| Author | Tokens | Token Proportion | Commits | Commit Proportion |
|---|---|---|---|---|
| Dave Airlie | 3849 | 28.82% | 23 | 13.07% |
| Noralf Trönnes | 2591 | 19.40% | 12 | 6.82% |
| Peter Rosin | 1121 | 8.39% | 3 | 1.70% |
| Ivan Mironov | 960 | 7.19% | 2 | 1.14% |
| Daniel Vetter | 845 | 6.33% | 34 | 19.32% |
| Archit Taneja | 530 | 3.97% | 5 | 2.84% |
| Thierry Reding | 480 | 3.59% | 8 | 4.55% |
| Rob Clark | 466 | 3.49% | 7 | 3.98% |
| Jesse Barnes | 382 | 2.86% | 5 | 2.84% |
| Hans de Goede | 298 | 2.23% | 1 | 0.57% |
| Ville Syrjälä | 287 | 2.15% | 9 | 5.11% |
| Chris Wilson | 268 | 2.01% | 9 | 5.11% |
| Eugeniy Paltsev | 179 | 1.34% | 1 | 0.57% |
| David Lechner | 166 | 1.24% | 3 | 1.70% |
| Maxime Ripard | 143 | 1.07% | 1 | 0.57% |
| Neil Armstrong | 81 | 0.61% | 1 | 0.57% |
| Geert Uytterhoeven | 78 | 0.58% | 1 | 0.57% |
| Jason Wessel | 73 | 0.55% | 3 | 1.70% |
| Maarten Lankhorst | 66 | 0.49% | 5 | 2.84% |
| Takashi Iwai | 60 | 0.45% | 2 | 1.14% |
| David Fries | 59 | 0.44% | 1 | 0.57% |
| Peter Wu | 51 | 0.38% | 1 | 0.57% |
| Xinliang Liu | 40 | 0.30% | 1 | 0.57% |
| Alex Deucher | 38 | 0.28% | 1 | 0.57% |
| Sachin Kamat | 30 | 0.22% | 2 | 1.14% |
| Sascha Hauer | 27 | 0.20% | 2 | 1.14% |
| Gabriel Krisman Bertazi | 18 | 0.13% | 1 | 0.57% |
| Shashank Sharma | 18 | 0.13% | 1 | 0.57% |
| Stefan Christ | 18 | 0.13% | 1 | 0.57% |
| Matt Roper | 13 | 0.10% | 3 | 1.70% |
| Adam Jackson | 12 | 0.09% | 2 | 1.14% |
| Laurent Pinchart | 11 | 0.08% | 1 | 0.57% |
| Rafael Antognolli | 10 | 0.07% | 1 | 0.57% |
| Paul Kocialkowski | 9 | 0.07% | 1 | 0.57% |
| Paulo Zanoni | 9 | 0.07% | 1 | 0.57% |
| Randy Dunlap | 9 | 0.07% | 1 | 0.57% |
| Xiubo Li | 9 | 0.07% | 1 | 0.57% |
| Gustavo A. R. Silva | 6 | 0.04% | 1 | 0.57% |
| Mikael Pettersson | 5 | 0.04% | 1 | 0.57% |
| James Simmons | 5 | 0.04% | 1 | 0.57% |
| Stephen Chandler Paul | 4 | 0.03% | 1 | 0.57% |
| David Howells | 4 | 0.03% | 1 | 0.57% |
| Sonika Jindal | 3 | 0.02% | 1 | 0.57% |
| Tejun Heo | 3 | 0.02% | 1 | 0.57% |
| Paul Gortmaker | 3 | 0.02% | 1 | 0.57% |
| Andy Shevchenko | 3 | 0.02% | 1 | 0.57% |
| Jani Nikula | 2 | 0.01% | 1 | 0.57% |
| Harsha Sharma | 2 | 0.01% | 1 | 0.57% |
| David Rientjes | 2 | 0.01% | 1 | 0.57% |
| Robert Foss | 2 | 0.01% | 1 | 0.57% |
| Daniel Stone | 1 | 0.01% | 1 | 0.57% |
| Wei Yongjun | 1 | 0.01% | 1 | 0.57% |
| Zhenyu Wang | 1 | 0.01% | 1 | 0.57% |
| Johannes Berg | 1 | 0.01% | 1 | 0.57% |
| Kees Cook | 1 | 0.01% | 1 | 0.57% |
| Clemens Ladisch | 1 | 0.01% | 1 | 0.57% |
| Total | 13354 | 176 |
/* * Copyright (c) 2006-2009 Red Hat Inc. * Copyright (c) 2006-2008 Intel Corporation * Copyright (c) 2007 Dave Airlie <airlied@linux.ie> * * DRM framebuffer helper functions * * Permission to use, copy, modify, distribute, and sell this software and its * documentation for any purpose is hereby granted without fee, provided that * the above copyright notice appear in all copies and that both that copyright * notice and this permission notice appear in supporting documentation, and * that the name of the copyright holders not be used in advertising or * publicity pertaining to distribution of the software without specific, * written prior permission. The copyright holders make no representations * about the suitability of this software for any purpose. It is provided "as * is" without express or implied warranty. * * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE * OF THIS SOFTWARE. * * Authors: * Dave Airlie <airlied@linux.ie> * Jesse Barnes <jesse.barnes@intel.com> */ #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt #include <linux/console.h> #include <linux/dma-buf.h> #include <linux/kernel.h> #include <linux/sysrq.h> #include <linux/slab.h> #include <linux/module.h> #include <drm/drmP.h> #include <drm/drm_crtc.h> #include <drm/drm_fb_helper.h> #include <drm/drm_crtc_helper.h> #include <drm/drm_atomic.h> #include <drm/drm_atomic_helper.h> #include "drm_crtc_internal.h" #include "drm_crtc_helper_internal.h" static bool drm_fbdev_emulation = true; module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); MODULE_PARM_DESC(fbdev_emulation, "Enable legacy fbdev emulation [default=true]"); static int drm_fbdev_overalloc = CONFIG_DRM_FBDEV_OVERALLOC; module_param(drm_fbdev_overalloc, int, 0444); MODULE_PARM_DESC(drm_fbdev_overalloc, "Overallocation of the fbdev buffer (%) [default=" __MODULE_STRING(CONFIG_DRM_FBDEV_OVERALLOC) "]"); /* * In order to keep user-space compatibility, we want in certain use-cases * to keep leaking the fbdev physical address to the user-space program * handling the fbdev buffer. * This is a bad habit essentially kept into closed source opengl driver * that should really be moved into open-source upstream projects instead * of using legacy physical addresses in user space to communicate with * other out-of-tree kernel modules. * * This module_param *should* be removed as soon as possible and be * considered as a broken and legacy behaviour from a modern fbdev device. */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) static bool drm_leak_fbdev_smem = false; module_param_unsafe(drm_leak_fbdev_smem, bool, 0600); MODULE_PARM_DESC(drm_leak_fbdev_smem, "Allow unsafe leaking fbdev physical smem address [default=false]"); #endif static LIST_HEAD(kernel_fb_helper_list); static DEFINE_MUTEX(kernel_fb_helper_lock); /** * DOC: fbdev helpers * * The fb helper functions are useful to provide an fbdev on top of a drm kernel * mode setting driver. They can be used mostly independently from the crtc * helper functions used by many drivers to implement the kernel mode setting * interfaces. * * Drivers that support a dumb buffer with a virtual address and mmap support, * should try out the generic fbdev emulation using drm_fbdev_generic_setup(). * * Setup fbdev emulation by calling drm_fb_helper_fbdev_setup() and tear it * down by calling drm_fb_helper_fbdev_teardown(). * * Drivers that need to handle connector hotplugging (e.g. dp mst) can't use * the setup helper and will need to do the whole four-step setup process with * drm_fb_helper_prepare(), drm_fb_helper_init(), * drm_fb_helper_single_add_all_connectors(), enable hotplugging and * drm_fb_helper_initial_config() to avoid a possible race window. * * At runtime drivers should restore the fbdev console by using * drm_fb_helper_lastclose() as their &drm_driver.lastclose callback. * They should also notify the fb helper code from updates to the output * configuration by using drm_fb_helper_output_poll_changed() as their * &drm_mode_config_funcs.output_poll_changed callback. * * For suspend/resume consider using drm_mode_config_helper_suspend() and * drm_mode_config_helper_resume() which takes care of fbdev as well. * * All other functions exported by the fb helper library can be used to * implement the fbdev driver interface by the driver. * * It is possible, though perhaps somewhat tricky, to implement race-free * hotplug detection using the fbdev helpers. The drm_fb_helper_prepare() * helper must be called first to initialize the minimum required to make * hotplug detection work. Drivers also need to make sure to properly set up * the &drm_mode_config.funcs member. After calling drm_kms_helper_poll_init() * it is safe to enable interrupts and start processing hotplug events. At the * same time, drivers should initialize all modeset objects such as CRTCs, * encoders and connectors. To finish up the fbdev helper initialization, the * drm_fb_helper_init() function is called. To probe for all attached displays * and set up an initial configuration using the detected hardware, drivers * should call drm_fb_helper_single_add_all_connectors() followed by * drm_fb_helper_initial_config(). * * If &drm_framebuffer_funcs.dirty is set, the * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will * accumulate changes and schedule &drm_fb_helper.dirty_work to run right * away. This worker then calls the dirty() function ensuring that it will * always run in process context since the fb_*() function could be running in * atomic context. If drm_fb_helper_deferred_io() is used as the deferred_io * callback it will also schedule dirty_work with the damage collected from the * mmap page writes. Drivers can use drm_fb_helper_defio_init() to setup * deferred I/O (coupled with drm_fb_helper_fbdev_teardown()). */ #define drm_fb_helper_for_each_connector(fbh, i__) \ for (({ lockdep_assert_held(&(fbh)->lock); }), \ i__ = 0; i__ < (fbh)->connector_count; i__++) static int __drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) { struct drm_fb_helper_connector *fb_conn; struct drm_fb_helper_connector **temp; unsigned int count; if (!drm_fbdev_emulation) return 0; lockdep_assert_held(&fb_helper->lock); count = fb_helper->connector_count + 1; if (count > fb_helper->connector_info_alloc_count) { size_t size = count * sizeof(fb_conn); temp = krealloc(fb_helper->connector_info, size, GFP_KERNEL); if (!temp) return -ENOMEM; fb_helper->connector_info_alloc_count = count; fb_helper->connector_info = temp; } fb_conn = kzalloc(sizeof(*fb_conn), GFP_KERNEL); if (!fb_conn) return -ENOMEM; drm_connector_get(connector); fb_conn->connector = connector; fb_helper->connector_info[fb_helper->connector_count++] = fb_conn; return 0; } int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) { int err; if (!fb_helper) return 0; mutex_lock(&fb_helper->lock); err = __drm_fb_helper_add_one_connector(fb_helper, connector); mutex_unlock(&fb_helper->lock); return err; } EXPORT_SYMBOL(drm_fb_helper_add_one_connector); /** * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev * emulation helper * @fb_helper: fbdev initialized with drm_fb_helper_init, can be NULL * * This functions adds all the available connectors for use with the given * fb_helper. This is a separate step to allow drivers to freely assign * connectors to the fbdev, e.g. if some are reserved for special purposes or * not adequate to be used for the fbcon. * * This function is protected against concurrent connector hotadds/removals * using drm_fb_helper_add_one_connector() and * drm_fb_helper_remove_one_connector(). */ int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) { struct drm_device *dev; struct drm_connector *connector; struct drm_connector_list_iter conn_iter; int i, ret = 0; if (!drm_fbdev_emulation || !fb_helper) return 0; dev = fb_helper->dev; mutex_lock(&fb_helper->lock); drm_connector_list_iter_begin(dev, &conn_iter); drm_for_each_connector_iter(connector, &conn_iter) { if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) continue; ret = __drm_fb_helper_add_one_connector(fb_helper, connector); if (ret) goto fail; } goto out; fail: drm_fb_helper_for_each_connector(fb_helper, i) { struct drm_fb_helper_connector *fb_helper_connector = fb_helper->connector_info[i]; drm_connector_put(fb_helper_connector->connector); kfree(fb_helper_connector); fb_helper->connector_info[i] = NULL; } fb_helper->connector_count = 0; out: drm_connector_list_iter_end(&conn_iter); mutex_unlock(&fb_helper->lock); return ret; } EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); static int __drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) { struct drm_fb_helper_connector *fb_helper_connector; int i, j; if (!drm_fbdev_emulation) return 0; lockdep_assert_held(&fb_helper->lock); drm_fb_helper_for_each_connector(fb_helper, i) { if (fb_helper->connector_info[i]->connector == connector) break; } if (i == fb_helper->connector_count) return -EINVAL; fb_helper_connector = fb_helper->connector_info[i]; drm_connector_put(fb_helper_connector->connector); for (j = i + 1; j < fb_helper->connector_count; j++) fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; fb_helper->connector_count--; kfree(fb_helper_connector); return 0; } int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector) { int err; if (!fb_helper) return 0; mutex_lock(&fb_helper->lock); err = __drm_fb_helper_remove_one_connector(fb_helper, connector); mutex_unlock(&fb_helper->lock); return err; } EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) { uint16_t *r_base, *g_base, *b_base; if (crtc->funcs->gamma_set == NULL) return; r_base = crtc->gamma_store; g_base = r_base + crtc->gamma_size; b_base = g_base + crtc->gamma_size; crtc->funcs->gamma_set(crtc, r_base, g_base, b_base, crtc->gamma_size, NULL); } /** * drm_fb_helper_debug_enter - implementation for &fb_ops.fb_debug_enter * @info: fbdev registered by the helper */ int drm_fb_helper_debug_enter(struct fb_info *info) { struct drm_fb_helper *helper = info->par; const struct drm_crtc_helper_funcs *funcs; int i; list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { for (i = 0; i < helper->crtc_count; i++) { struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; if (!mode_set->crtc->enabled) continue; funcs = mode_set->crtc->helper_private; if (funcs->mode_set_base_atomic == NULL) continue; if (drm_drv_uses_atomic_modeset(mode_set->crtc->dev)) continue; funcs->mode_set_base_atomic(mode_set->crtc, mode_set->fb, mode_set->x, mode_set->y, ENTER_ATOMIC_MODE_SET); } } return 0; } EXPORT_SYMBOL(drm_fb_helper_debug_enter); /** * drm_fb_helper_debug_leave - implementation for &fb_ops.fb_debug_leave * @info: fbdev registered by the helper */ int drm_fb_helper_debug_leave(struct fb_info *info) { struct drm_fb_helper *helper = info->par; struct drm_crtc *crtc; const struct drm_crtc_helper_funcs *funcs; struct drm_framebuffer *fb; int i; for (i = 0; i < helper->crtc_count; i++) { struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set; crtc = mode_set->crtc; if (drm_drv_uses_atomic_modeset(crtc->dev)) continue; funcs = crtc->helper_private; fb = crtc->primary->fb; if (!crtc->enabled) continue; if (!fb) { DRM_ERROR("no fb to restore??\n"); continue; } if (funcs->mode_set_base_atomic == NULL) continue; drm_fb_helper_restore_lut_atomic(mode_set->crtc); funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, crtc->y, LEAVE_ATOMIC_MODE_SET); } return 0; } EXPORT_SYMBOL(drm_fb_helper_debug_leave); static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active) { struct drm_device *dev = fb_helper->dev; struct drm_plane_state *plane_state; struct drm_plane *plane; struct drm_atomic_state *state; int i, ret; struct drm_modeset_acquire_ctx ctx; drm_modeset_acquire_init(&ctx, 0); state = drm_atomic_state_alloc(dev); if (!state) { ret = -ENOMEM; goto out_ctx; } state->acquire_ctx = &ctx; retry: drm_for_each_plane(plane, dev) { plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { ret = PTR_ERR(plane_state); goto out_state; } plane_state->rotation = DRM_MODE_ROTATE_0; /* disable non-primary: */ if (plane->type == DRM_PLANE_TYPE_PRIMARY) continue; ret = __drm_atomic_helper_disable_plane(plane, plane_state); if (ret != 0) goto out_state; } for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; struct drm_plane *primary = mode_set->crtc->primary; /* Cannot fail as we've already gotten the plane state above */ plane_state = drm_atomic_get_new_plane_state(state, primary); plane_state->rotation = fb_helper->crtc_info[i].rotation; ret = __drm_atomic_helper_set_config(mode_set, state); if (ret != 0) goto out_state; /* * __drm_atomic_helper_set_config() sets active when a * mode is set, unconditionally clear it if we force DPMS off */ if (!active) { struct drm_crtc *crtc = mode_set->crtc; struct drm_crtc_state *crtc_state = drm_atomic_get_new_crtc_state(state, crtc); crtc_state->active = false; } } ret = drm_atomic_commit(state); out_state: if (ret == -EDEADLK) goto backoff; drm_atomic_state_put(state); out_ctx: drm_modeset_drop_locks(&ctx); drm_modeset_acquire_fini(&ctx); return ret; backoff: drm_atomic_state_clear(state); drm_modeset_backoff(&ctx); goto retry; } static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_plane *plane; int i, ret = 0; drm_modeset_lock_all(fb_helper->dev); drm_for_each_plane(plane, dev) { if (plane->type != DRM_PLANE_TYPE_PRIMARY) drm_plane_force_disable(plane); if (plane->rotation_property) drm_mode_plane_set_obj_prop(plane, plane->rotation_property, DRM_MODE_ROTATE_0); } for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; struct drm_crtc *crtc = mode_set->crtc; if (crtc->funcs->cursor_set2) { ret = crtc->funcs->cursor_set2(crtc, NULL, 0, 0, 0, 0, 0); if (ret) goto out; } else if (crtc->funcs->cursor_set) { ret = crtc->funcs->cursor_set(crtc, NULL, 0, 0, 0); if (ret) goto out; } ret = drm_mode_set_config_internal(mode_set); if (ret) goto out; } out: drm_modeset_unlock_all(fb_helper->dev); return ret; } static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; if (drm_drv_uses_atomic_modeset(dev)) return restore_fbdev_mode_atomic(fb_helper, true); else return restore_fbdev_mode_legacy(fb_helper); } /** * drm_fb_helper_restore_fbdev_mode_unlocked - restore fbdev configuration * @fb_helper: driver-allocated fbdev helper, can be NULL * * This should be called from driver's drm &drm_driver.lastclose callback * when implementing an fbcon on top of kms using this helper. This ensures that * the user isn't greeted with a black screen when e.g. X dies. * * RETURNS: * Zero if everything went ok, negative error code otherwise. */ int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) { bool do_delayed; int ret; if (!drm_fbdev_emulation || !fb_helper) return -ENODEV; if (READ_ONCE(fb_helper->deferred_setup)) return 0; mutex_lock(&fb_helper->lock); ret = restore_fbdev_mode(fb_helper); do_delayed = fb_helper->delayed_hotplug; if (do_delayed) fb_helper->delayed_hotplug = false; mutex_unlock(&fb_helper->lock); if (do_delayed) drm_fb_helper_hotplug_event(fb_helper); return ret; } EXPORT_SYMBOL(drm_fb_helper_restore_fbdev_mode_unlocked); static bool drm_fb_helper_is_bound(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; struct drm_crtc *crtc; int bound = 0, crtcs_bound = 0; /* * Sometimes user space wants everything disabled, so don't steal the * display if there's a master. */ if (READ_ONCE(dev->master)) return false; drm_for_each_crtc(crtc, dev) { drm_modeset_lock(&crtc->mutex, NULL); if (crtc->primary->fb) crtcs_bound++; if (crtc->primary->fb == fb_helper->fb) bound++; drm_modeset_unlock(&crtc->mutex); } if (bound < crtcs_bound) return false; return true; } #ifdef CONFIG_MAGIC_SYSRQ /* * restore fbcon display for all kms driver's using this helper, used for sysrq * and panic handling. */ static bool drm_fb_helper_force_kernel_mode(void) { bool ret, error = false; struct drm_fb_helper *helper; if (list_empty(&kernel_fb_helper_list)) return false; list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { struct drm_device *dev = helper->dev; if (dev->switch_power_state == DRM_SWITCH_POWER_OFF) continue; mutex_lock(&helper->lock); ret = restore_fbdev_mode(helper); if (ret) error = true; mutex_unlock(&helper->lock); } return error; } static void drm_fb_helper_restore_work_fn(struct work_struct *ignored) { bool ret; ret = drm_fb_helper_force_kernel_mode(); if (ret == true) DRM_ERROR("Failed to restore crtc configuration\n"); } static DECLARE_WORK(drm_fb_helper_restore_work, drm_fb_helper_restore_work_fn); static void drm_fb_helper_sysrq(int dummy1) { schedule_work(&drm_fb_helper_restore_work); } static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { .handler = drm_fb_helper_sysrq, .help_msg = "force-fb(V)", .action_msg = "Restore framebuffer console", }; #else static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; #endif static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode) { struct drm_device *dev = fb_helper->dev; struct drm_crtc *crtc; struct drm_connector *connector; int i, j; drm_modeset_lock_all(dev); for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; if (!crtc->enabled) continue; /* Walk the connectors & encoders on this fb turning them on/off */ drm_fb_helper_for_each_connector(fb_helper, j) { connector = fb_helper->connector_info[j]->connector; connector->funcs->dpms(connector, dpms_mode); drm_object_property_set_value(&connector->base, dev->mode_config.dpms_property, dpms_mode); } } drm_modeset_unlock_all(dev); } static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) { struct drm_fb_helper *fb_helper = info->par; /* * For each CRTC in this fb, turn the connectors on/off. */ mutex_lock(&fb_helper->lock); if (!drm_fb_helper_is_bound(fb_helper)) { mutex_unlock(&fb_helper->lock); return; } if (drm_drv_uses_atomic_modeset(fb_helper->dev)) restore_fbdev_mode_atomic(fb_helper, dpms_mode == DRM_MODE_DPMS_ON); else dpms_legacy(fb_helper, dpms_mode); mutex_unlock(&fb_helper->lock); } /** * drm_fb_helper_blank - implementation for &fb_ops.fb_blank * @blank: desired blanking state * @info: fbdev registered by the helper */ int drm_fb_helper_blank(int blank, struct fb_info *info) { if (oops_in_progress) return -EBUSY; switch (blank) { /* Display: On; HSync: On, VSync: On */ case FB_BLANK_UNBLANK: drm_fb_helper_dpms(info, DRM_MODE_DPMS_ON); break; /* Display: Off; HSync: On, VSync: On */ case FB_BLANK_NORMAL: drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); break; /* Display: Off; HSync: Off, VSync: On */ case FB_BLANK_HSYNC_SUSPEND: drm_fb_helper_dpms(info, DRM_MODE_DPMS_STANDBY); break; /* Display: Off; HSync: On, VSync: Off */ case FB_BLANK_VSYNC_SUSPEND: drm_fb_helper_dpms(info, DRM_MODE_DPMS_SUSPEND); break; /* Display: Off; HSync: Off, VSync: Off */ case FB_BLANK_POWERDOWN: drm_fb_helper_dpms(info, DRM_MODE_DPMS_OFF); break; } return 0; } EXPORT_SYMBOL(drm_fb_helper_blank); static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, struct drm_mode_set *modeset) { int i; for (i = 0; i < modeset->num_connectors; i++) { drm_connector_put(modeset->connectors[i]); modeset->connectors[i] = NULL; } modeset->num_connectors = 0; drm_mode_destroy(helper->dev, modeset->mode); modeset->mode = NULL; /* FIXME should hold a ref? */ modeset->fb = NULL; } static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) { int i; for (i = 0; i < helper->connector_count; i++) { drm_connector_put(helper->connector_info[i]->connector); kfree(helper->connector_info[i]); } kfree(helper->connector_info); for (i = 0; i < helper->crtc_count; i++) { struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; drm_fb_helper_modeset_release(helper, modeset); kfree(modeset->connectors); } kfree(helper->crtc_info); } static void drm_fb_helper_resume_worker(struct work_struct *work) { struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, resume_work); console_lock(); fb_set_suspend(helper->fbdev, 0); console_unlock(); } static void drm_fb_helper_dirty_blit_real(struct drm_fb_helper *fb_helper, struct drm_clip_rect *clip) { struct drm_framebuffer *fb = fb_helper->fb; unsigned int cpp = drm_format_plane_cpp(fb->format->format, 0); size_t offset = clip->y1 * fb->pitches[0] + clip->x1 * cpp; void *src = fb_helper->fbdev->screen_buffer + offset; void *dst = fb_helper->buffer->vaddr + offset; size_t len = (clip->x2 - clip->x1) * cpp; unsigned int y; for (y = clip->y1; y < clip->y2; y++) { memcpy(dst, src, len); src += fb->pitches[0]; dst += fb->pitches[0]; } } static void drm_fb_helper_dirty_work(struct work_struct *work) { struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, dirty_work); struct drm_clip_rect *clip = &helper->dirty_clip; struct drm_clip_rect clip_copy; unsigned long flags; spin_lock_irqsave(&helper->dirty_lock, flags); clip_copy = *clip; clip->x1 = clip->y1 = ~0; clip->x2 = clip->y2 = 0; spin_unlock_irqrestore(&helper->dirty_lock, flags); /* call dirty callback only when it has been really touched */ if (clip_copy.x1 < clip_copy.x2 && clip_copy.y1 < clip_copy.y2) { /* Generic fbdev uses a shadow buffer */ if (helper->buffer) drm_fb_helper_dirty_blit_real(helper, &clip_copy); helper->fb->funcs->dirty(helper->fb, NULL, 0, 0, &clip_copy, 1); } } /** * drm_fb_helper_prepare - setup a drm_fb_helper structure * @dev: DRM device * @helper: driver-allocated fbdev helper structure to set up * @funcs: pointer to structure of functions associate with this helper * * Sets up the bare minimum to make the framebuffer helper usable. This is * useful to implement race-free initialization of the polling helpers. */ void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper, const struct drm_fb_helper_funcs *funcs) { INIT_LIST_HEAD(&helper->kernel_fb_list); spin_lock_init(&helper->dirty_lock); INIT_WORK(&helper->resume_work, drm_fb_helper_resume_worker); INIT_WORK(&helper->dirty_work, drm_fb_helper_dirty_work); helper->dirty_clip.x1 = helper->dirty_clip.y1 = ~0; mutex_init(&helper->lock); helper->funcs = funcs; helper->dev = dev; } EXPORT_SYMBOL(drm_fb_helper_prepare); /** * drm_fb_helper_init - initialize a &struct drm_fb_helper * @dev: drm device * @fb_helper: driver-allocated fbdev helper structure to initialize * @max_conn_count: max connector count * * This allocates the structures for the fbdev helper with the given limits. * Note that this won't yet touch the hardware (through the driver interfaces) * nor register the fbdev. This is only done in drm_fb_helper_initial_config() * to allow driver writes more control over the exact init sequence. * * Drivers must call drm_fb_helper_prepare() before calling this function. * * RETURNS: * Zero if everything went ok, nonzero otherwise. */ int drm_fb_helper_init(struct drm_device *dev, struct drm_fb_helper *fb_helper, int max_conn_count) { struct drm_crtc *crtc; struct drm_mode_config *config = &dev->mode_config; int i; if (!drm_fbdev_emulation) { dev->fb_helper = fb_helper; return 0; } if (!max_conn_count) return -EINVAL; fb_helper->crtc_info = kcalloc(config->num_crtc, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); if (!fb_helper->crtc_info) return -ENOMEM; fb_helper->crtc_count = config->num_crtc; fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); if (!fb_helper->connector_info) { kfree(fb_helper->crtc_info); return -ENOMEM; } fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; fb_helper->connector_count = 0; for (i = 0; i < fb_helper->crtc_count; i++) { fb_helper->crtc_info[i].mode_set.connectors = kcalloc(max_conn_count, sizeof(struct drm_connector *), GFP_KERNEL); if (!fb_helper->crtc_info[i].mode_set.connectors) goto out_free; fb_helper->crtc_info[i].mode_set.num_connectors = 0; fb_helper->crtc_info[i].rotation = DRM_MODE_ROTATE_0; } i = 0; drm_for_each_crtc(crtc, dev) { fb_helper->crtc_info[i].mode_set.crtc = crtc; i++; } dev->fb_helper = fb_helper; return 0; out_free: drm_fb_helper_crtc_free(fb_helper); return -ENOMEM; } EXPORT_SYMBOL(drm_fb_helper_init); /** * drm_fb_helper_alloc_fbi - allocate fb_info and some of its members * @fb_helper: driver-allocated fbdev helper * * A helper to alloc fb_info and the members cmap and apertures. Called * by the driver within the fb_probe fb_helper callback function. Drivers do not * need to release the allocated fb_info structure themselves, this is * automatically done when calling drm_fb_helper_fini(). * * RETURNS: * fb_info pointer if things went okay, pointer containing error code * otherwise */ struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper) { struct device *dev = fb_helper->dev->dev; struct fb_info *info; int ret; info = framebuffer_alloc(0, dev); if (!info) return ERR_PTR(-ENOMEM); ret = fb_alloc_cmap(&info->cmap, 256, 0); if (ret) goto err_release; info->apertures = alloc_apertures(1); if (!info->apertures) { ret = -ENOMEM; goto err_free_cmap; } fb_helper->fbdev = info; return info; err_free_cmap: fb_dealloc_cmap(&info->cmap); err_release: framebuffer_release(info); return ERR_PTR(ret); } EXPORT_SYMBOL(drm_fb_helper_alloc_fbi); /** * drm_fb_helper_unregister_fbi - unregister fb_info framebuffer device * @fb_helper: driver-allocated fbdev helper, can be NULL * * A wrapper around unregister_framebuffer, to release the fb_info * framebuffer device. This must be called before releasing all resources for * @fb_helper by calling drm_fb_helper_fini(). */ void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper) { if (fb_helper && fb_helper->fbdev) unregister_framebuffer(fb_helper->fbdev); } EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); /** * drm_fb_helper_fini - finialize a &struct drm_fb_helper * @fb_helper: driver-allocated fbdev helper, can be NULL * * This cleans up all remaining resources associated with @fb_helper. Must be * called after drm_fb_helper_unlink_fbi() was called. */ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) { struct fb_info *info; if (!fb_helper) return; fb_helper->dev->fb_helper = NULL; if (!drm_fbdev_emulation) return; cancel_work_sync(&fb_helper->resume_work); cancel_work_sync(&fb_helper->dirty_work); info = fb_helper->fbdev; if (info) { if (info->cmap.len) fb_dealloc_cmap(&info->cmap); framebuffer_release(info); } fb_helper->fbdev = NULL; mutex_lock(&kernel_fb_helper_lock); if (!list_empty(&fb_helper->kernel_fb_list)) { list_del(&fb_helper->kernel_fb_list); if (list_empty(&kernel_fb_helper_list)) unregister_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); } mutex_unlock(&kernel_fb_helper_lock); mutex_destroy(&fb_helper->lock); drm_fb_helper_crtc_free(fb_helper); } EXPORT_SYMBOL(drm_fb_helper_fini); /** * drm_fb_helper_unlink_fbi - wrapper around unlink_framebuffer * @fb_helper: driver-allocated fbdev helper, can be NULL * * A wrapper around unlink_framebuffer implemented by fbdev core */ void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper) { if (fb_helper && fb_helper->fbdev) unlink_framebuffer(fb_helper->fbdev); } EXPORT_SYMBOL(drm_fb_helper_unlink_fbi); static void drm_fb_helper_dirty(struct fb_info *info, u32 x, u32 y, u32 width, u32 height) { struct drm_fb_helper *helper = info->par; struct drm_clip_rect *clip = &helper->dirty_clip; unsigned long flags; if (!helper->fb->funcs->dirty) return; spin_lock_irqsave(&helper->dirty_lock, flags); clip->x1 = min_t(u32, clip->x1, x); clip->y1 = min_t(u32, clip->y1, y); clip->x2 = max_t(u32, clip->x2, x + width); clip->y2 = max_t(u32, clip->y2, y + height); spin_unlock_irqrestore(&helper->dirty_lock, flags); schedule_work(&helper->dirty_work); } /** * drm_fb_helper_deferred_io() - fbdev deferred_io callback function * @info: fb_info struct pointer * @pagelist: list of dirty mmap framebuffer pages * * This function is used as the &fb_deferred_io.deferred_io * callback function for flushing the fbdev mmap writes. */ void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagelist) { unsigned long start, end, min, max; struct page *page; u32 y1, y2; min = ULONG_MAX; max = 0; list_for_each_entry(page, pagelist, lru) { start = page->index << PAGE_SHIFT; end = start + PAGE_SIZE - 1; min = min(min, start); max = max(max, end); } if (min < max) { y1 = min / info->fix.line_length; y2 = min_t(u32, DIV_ROUND_UP(max, info->fix.line_length), info->var.yres); drm_fb_helper_dirty(info, 0, y1, info->var.xres, y2 - y1); } } EXPORT_SYMBOL(drm_fb_helper_deferred_io); /** * drm_fb_helper_defio_init - fbdev deferred I/O initialization * @fb_helper: driver-allocated fbdev helper * * This function allocates &fb_deferred_io, sets callback to * drm_fb_helper_deferred_io(), delay to 50ms and calls fb_deferred_io_init(). * It should be called from the &drm_fb_helper_funcs->fb_probe callback. * drm_fb_helper_fbdev_teardown() cleans up deferred I/O. * * NOTE: A copy of &fb_ops is made and assigned to &info->fbops. This is done * because fb_deferred_io_cleanup() clears &fbops->fb_mmap and would thereby * affect other instances of that &fb_ops. * * Returns: * 0 on success or a negative error code on failure. */ int drm_fb_helper_defio_init(struct drm_fb_helper *fb_helper) { struct fb_info *info = fb_helper->fbdev; struct fb_deferred_io *fbdefio; struct fb_ops *fbops; fbdefio = kzalloc(sizeof(*fbdefio), GFP_KERNEL); fbops = kzalloc(sizeof(*fbops), GFP_KERNEL); if (!fbdefio || !fbops) { kfree(fbdefio); kfree(fbops); return -ENOMEM; } info->fbdefio = fbdefio; fbdefio->delay = msecs_to_jiffies(50); fbdefio->deferred_io = drm_fb_helper_deferred_io; *fbops = *info->fbops; info->fbops = fbops; fb_deferred_io_init(info); return 0; } EXPORT_SYMBOL(drm_fb_helper_defio_init); /** * drm_fb_helper_sys_read - wrapper around fb_sys_read * @info: fb_info struct pointer * @buf: userspace buffer to read from framebuffer memory * @count: number of bytes to read from framebuffer memory * @ppos: read offset within framebuffer memory * * A wrapper around fb_sys_read implemented by fbdev core */ ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf, size_t count, loff_t *ppos) { return fb_sys_read(info, buf, count, ppos); } EXPORT_SYMBOL(drm_fb_helper_sys_read); /** * drm_fb_helper_sys_write - wrapper around fb_sys_write * @info: fb_info struct pointer * @buf: userspace buffer to write to framebuffer memory * @count: number of bytes to write to framebuffer memory * @ppos: write offset within framebuffer memory * * A wrapper around fb_sys_write implemented by fbdev core */ ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf, size_t count, loff_t *ppos) { ssize_t ret; ret = fb_sys_write(info, buf, count, ppos); if (ret > 0) drm_fb_helper_dirty(info, 0, 0, info->var.xres, info->var.yres); return ret; } EXPORT_SYMBOL(drm_fb_helper_sys_write); /** * drm_fb_helper_sys_fillrect - wrapper around sys_fillrect * @info: fbdev registered by the helper * @rect: info about rectangle to fill * * A wrapper around sys_fillrect implemented by fbdev core */ void drm_fb_helper_sys_fillrect(struct fb_info *info, const struct fb_fillrect *rect) { sys_fillrect(info, rect); drm_fb_helper_dirty(info, rect->dx, rect->dy, rect->width, rect->height); } EXPORT_SYMBOL(drm_fb_helper_sys_fillrect); /** * drm_fb_helper_sys_copyarea - wrapper around sys_copyarea * @info: fbdev registered by the helper * @area: info about area to copy * * A wrapper around sys_copyarea implemented by fbdev core */ void drm_fb_helper_sys_copyarea(struct fb_info *info, const struct fb_copyarea *area) { sys_copyarea(info, area); drm_fb_helper_dirty(info, area->dx, area->dy, area->width, area->height); } EXPORT_SYMBOL(drm_fb_helper_sys_copyarea); /** * drm_fb_helper_sys_imageblit - wrapper around sys_imageblit * @info: fbdev registered by the helper * @image: info about image to blit * * A wrapper around sys_imageblit implemented by fbdev core */ void drm_fb_helper_sys_imageblit(struct fb_info *info, const struct fb_image *image) { sys_imageblit(info, image); drm_fb_helper_dirty(info, image->dx, image->dy, image->width, image->height); } EXPORT_SYMBOL(drm_fb_helper_sys_imageblit); /** * drm_fb_helper_cfb_fillrect - wrapper around cfb_fillrect * @info: fbdev registered by the helper * @rect: info about rectangle to fill * * A wrapper around cfb_fillrect implemented by fbdev core */ void drm_fb_helper_cfb_fillrect(struct fb_info *info, const struct fb_fillrect *rect) { cfb_fillrect(info, rect); drm_fb_helper_dirty(info, rect->dx, rect->dy, rect->width, rect->height); } EXPORT_SYMBOL(drm_fb_helper_cfb_fillrect); /** * drm_fb_helper_cfb_copyarea - wrapper around cfb_copyarea * @info: fbdev registered by the helper * @area: info about area to copy * * A wrapper around cfb_copyarea implemented by fbdev core */ void drm_fb_helper_cfb_copyarea(struct fb_info *info, const struct fb_copyarea *area) { cfb_copyarea(info, area); drm_fb_helper_dirty(info, area->dx, area->dy, area->width, area->height); } EXPORT_SYMBOL(drm_fb_helper_cfb_copyarea); /** * drm_fb_helper_cfb_imageblit - wrapper around cfb_imageblit * @info: fbdev registered by the helper * @image: info about image to blit * * A wrapper around cfb_imageblit implemented by fbdev core */ void drm_fb_helper_cfb_imageblit(struct fb_info *info, const struct fb_image *image) { cfb_imageblit(info, image); drm_fb_helper_dirty(info, image->dx, image->dy, image->width, image->height); } EXPORT_SYMBOL(drm_fb_helper_cfb_imageblit); /** * drm_fb_helper_set_suspend - wrapper around fb_set_suspend * @fb_helper: driver-allocated fbdev helper, can be NULL * @suspend: whether to suspend or resume * * A wrapper around fb_set_suspend implemented by fbdev core. * Use drm_fb_helper_set_suspend_unlocked() if you don't need to take * the lock yourself */ void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend) { if (fb_helper && fb_helper->fbdev) fb_set_suspend(fb_helper->fbdev, suspend); } EXPORT_SYMBOL(drm_fb_helper_set_suspend); /** * drm_fb_helper_set_suspend_unlocked - wrapper around fb_set_suspend that also * takes the console lock * @fb_helper: driver-allocated fbdev helper, can be NULL * @suspend: whether to suspend or resume * * A wrapper around fb_set_suspend() that takes the console lock. If the lock * isn't available on resume, a worker is tasked with waiting for the lock * to become available. The console lock can be pretty contented on resume * due to all the printk activity. * * This function can be called multiple times with the same state since * &fb_info.state is checked to see if fbdev is running or not before locking. * * Use drm_fb_helper_set_suspend() if you need to take the lock yourself. */ void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, bool suspend) { if (!fb_helper || !fb_helper->fbdev) return; /* make sure there's no pending/ongoing resume */ flush_work(&fb_helper->resume_work); if (suspend) { if (fb_helper->fbdev->state != FBINFO_STATE_RUNNING) return; console_lock(); } else { if (fb_helper->fbdev->state == FBINFO_STATE_RUNNING) return; if (!console_trylock()) { schedule_work(&fb_helper->resume_work); return; } } fb_set_suspend(fb_helper->fbdev, suspend); console_unlock(); } EXPORT_SYMBOL(drm_fb_helper_set_suspend_unlocked); static int setcmap_pseudo_palette(struct fb_cmap *cmap, struct fb_info *info) { u32 *palette = (u32 *)info->pseudo_palette; int i; if (cmap->start + cmap->len > 16) return -EINVAL; for (i = 0; i < cmap->len; ++i) { u16 red = cmap->red[i]; u16 green = cmap->green[i]; u16 blue = cmap->blue[i]; u32 value; red >>= 16 - info->var.red.length; green >>= 16 - info->var.green.length; blue >>= 16 - info->var.blue.length; value = (red << info->var.red.offset) | (green << info->var.green.offset) | (blue << info->var.blue.offset); if (info->var.transp.length > 0) { u32 mask = (1 << info->var.transp.length) - 1; mask <<= info->var.transp.offset; value |= mask; } palette[cmap->start + i] = value; } return 0; } static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_crtc *crtc; u16 *r, *g, *b; int i, ret = 0; drm_modeset_lock_all(fb_helper->dev); for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; if (!crtc->funcs->gamma_set || !crtc->gamma_size) return -EINVAL; if (cmap->start + cmap->len > crtc->gamma_size) return -EINVAL; r = crtc->gamma_store; g = r + crtc->gamma_size; b = g + crtc->gamma_size; memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r)); memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g)); memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b)); ret = crtc->funcs->gamma_set(crtc, r, g, b, crtc->gamma_size, NULL); if (ret) return ret; } drm_modeset_unlock_all(fb_helper->dev); return ret; } static struct drm_property_blob *setcmap_new_gamma_lut(struct drm_crtc *crtc, struct fb_cmap *cmap) { struct drm_device *dev = crtc->dev; struct drm_property_blob *gamma_lut; struct drm_color_lut *lut; int size = crtc->gamma_size; int i; if (!size || cmap->start + cmap->len > size) return ERR_PTR(-EINVAL); gamma_lut = drm_property_create_blob(dev, sizeof(*lut) * size, NULL); if (IS_ERR(gamma_lut)) return gamma_lut; lut = gamma_lut->data; if (cmap->start || cmap->len != size) { u16 *r = crtc->gamma_store; u16 *g = r + crtc->gamma_size; u16 *b = g + crtc->gamma_size; for (i = 0; i < cmap->start; i++) { lut[i].red = r[i]; lut[i].green = g[i]; lut[i].blue = b[i]; } for (i = cmap->start + cmap->len; i < size; i++) { lut[i].red = r[i]; lut[i].green = g[i]; lut[i].blue = b[i]; } } for (i = 0; i < cmap->len; i++) { lut[cmap->start + i].red = cmap->red[i]; lut[cmap->start + i].green = cmap->green[i]; lut[cmap->start + i].blue = cmap->blue[i]; } return gamma_lut; } static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_device *dev = fb_helper->dev; struct drm_property_blob *gamma_lut = NULL; struct drm_modeset_acquire_ctx ctx; struct drm_crtc_state *crtc_state; struct drm_atomic_state *state; struct drm_crtc *crtc; u16 *r, *g, *b; int i, ret = 0; bool replaced; drm_modeset_acquire_init(&ctx, 0); state = drm_atomic_state_alloc(dev); if (!state) { ret = -ENOMEM; goto out_ctx; } state->acquire_ctx = &ctx; retry: for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; if (!gamma_lut) gamma_lut = setcmap_new_gamma_lut(crtc, cmap); if (IS_ERR(gamma_lut)) { ret = PTR_ERR(gamma_lut); gamma_lut = NULL; goto out_state; } crtc_state = drm_atomic_get_crtc_state(state, crtc); if (IS_ERR(crtc_state)) { ret = PTR_ERR(crtc_state); goto out_state; } replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL); replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL); replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, gamma_lut); crtc_state->color_mgmt_changed |= replaced; } ret = drm_atomic_commit(state); if (ret) goto out_state; for (i = 0; i < fb_helper->crtc_count; i++) { crtc = fb_helper->crtc_info[i].mode_set.crtc; r = crtc->gamma_store; g = r + crtc->gamma_size; b = g + crtc->gamma_size; memcpy(r + cmap->start, cmap->red, cmap->len * sizeof(*r)); memcpy(g + cmap->start, cmap->green, cmap->len * sizeof(*g)); memcpy(b + cmap->start, cmap->blue, cmap->len * sizeof(*b)); } out_state: if (ret == -EDEADLK) goto backoff; drm_property_blob_put(gamma_lut); drm_atomic_state_put(state); out_ctx: drm_modeset_drop_locks(&ctx); drm_modeset_acquire_fini(&ctx); return ret; backoff: drm_atomic_state_clear(state); drm_modeset_backoff(&ctx); goto retry; } /** * drm_fb_helper_setcmap - implementation for &fb_ops.fb_setcmap * @cmap: cmap to set * @info: fbdev registered by the helper */ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; int ret; if (oops_in_progress) return -EBUSY; mutex_lock(&fb_helper->lock); if (!drm_fb_helper_is_bound(fb_helper)) { ret = -EBUSY; goto out; } if (info->fix.visual == FB_VISUAL_TRUECOLOR) ret = setcmap_pseudo_palette(cmap, info); else if (drm_drv_uses_atomic_modeset(fb_helper->dev)) ret = setcmap_atomic(cmap, info); else ret = setcmap_legacy(cmap, info); out: mutex_unlock(&fb_helper->lock); return ret; } EXPORT_SYMBOL(drm_fb_helper_setcmap); /** * drm_fb_helper_ioctl - legacy ioctl implementation * @info: fbdev registered by the helper * @cmd: ioctl command * @arg: ioctl argument * * A helper to implement the standard fbdev ioctl. Only * FBIO_WAITFORVSYNC is implemented for now. */ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, unsigned long arg) { struct drm_fb_helper *fb_helper = info->par; struct drm_mode_set *mode_set; struct drm_crtc *crtc; int ret = 0; mutex_lock(&fb_helper->lock); if (!drm_fb_helper_is_bound(fb_helper)) { ret = -EBUSY; goto unlock; } switch (cmd) { case FBIO_WAITFORVSYNC: /* * Only consider the first CRTC. * * This ioctl is supposed to take the CRTC number as * an argument, but in fbdev times, what that number * was supposed to be was quite unclear, different * drivers were passing that argument differently * (some by reference, some by value), and most of the * userspace applications were just hardcoding 0 as an * argument. * * The first CRTC should be the integrated panel on * most drivers, so this is the best choice we can * make. If we're not smart enough here, one should * just consider switch the userspace to KMS. */ mode_set = &fb_helper->crtc_info[0].mode_set; crtc = mode_set->crtc; /* * Only wait for a vblank event if the CRTC is * enabled, otherwise just don't do anythintg, * not even report an error. */ ret = drm_crtc_vblank_get(crtc); if (!ret) { drm_crtc_wait_one_vblank(crtc); drm_crtc_vblank_put(crtc); } ret = 0; goto unlock; default: ret = -ENOTTY; } unlock: mutex_unlock(&fb_helper->lock); return ret; } EXPORT_SYMBOL(drm_fb_helper_ioctl); static bool drm_fb_pixel_format_equal(const struct fb_var_screeninfo *var_1, const struct fb_var_screeninfo *var_2) { return var_1->bits_per_pixel == var_2->bits_per_pixel && var_1->grayscale == var_2->grayscale && var_1->red.offset == var_2->red.offset && var_1->red.length == var_2->red.length && var_1->red.msb_right == var_2->red.msb_right && var_1->green.offset == var_2->green.offset && var_1->green.length == var_2->green.length && var_1->green.msb_right == var_2->green.msb_right && var_1->blue.offset == var_2->blue.offset && var_1->blue.length == var_2->blue.length && var_1->blue.msb_right == var_2->blue.msb_right && var_1->transp.offset == var_2->transp.offset && var_1->transp.length == var_2->transp.length && var_1->transp.msb_right == var_2->transp.msb_right; } static void drm_fb_helper_fill_pixel_fmt(struct fb_var_screeninfo *var, u8 depth) { switch (depth) { case 8: var->red.offset = 0; var->green.offset = 0; var->blue.offset = 0; var->red.length = 8; /* 8bit DAC */ var->green.length = 8; var->blue.length = 8; var->transp.offset = 0; var->transp.length = 0; break; case 15: var->red.offset = 10; var->green.offset = 5; var->blue.offset = 0; var->red.length = 5; var->green.length = 5; var->blue.length = 5; var->transp.offset = 15; var->transp.length = 1; break; case 16: var->red.offset = 11; var->green.offset = 5; var->blue.offset = 0; var->red.length = 5; var->green.length = 6; var->blue.length = 5; var->transp.offset = 0; break; case 24: var->red.offset = 16; var->green.offset = 8; var->blue.offset = 0; var->red.length = 8; var->green.length = 8; var->blue.length = 8; var->transp.offset = 0; var->transp.length = 0; break; case 32: var->red.offset = 16; var->green.offset = 8; var->blue.offset = 0; var->red.length = 8; var->green.length = 8; var->blue.length = 8; var->transp.offset = 24; var->transp.length = 8; break; default: break; } } /** * drm_fb_helper_check_var - implementation for &fb_ops.fb_check_var * @var: screeninfo to check * @info: fbdev registered by the helper */ int drm_fb_helper_check_var(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_framebuffer *fb = fb_helper->fb; if (in_dbg_master()) return -EINVAL; if (var->pixclock != 0) { DRM_DEBUG("fbdev emulation doesn't support changing the pixel clock, value of pixclock is ignored\n"); var->pixclock = 0; } if ((drm_format_info_block_width(fb->format, 0) > 1) || (drm_format_info_block_height(fb->format, 0) > 1)) return -EINVAL; /* * Changes struct fb_var_screeninfo are currently not pushed back * to KMS, hence fail if different settings are requested. */ if (var->bits_per_pixel != fb->format->cpp[0] * 8 || var->xres > fb->width || var->yres > fb->height || var->xres_virtual > fb->width || var->yres_virtual > fb->height) { DRM_DEBUG("fb requested width/height/bpp can't fit in current fb " "request %dx%d-%d (virtual %dx%d) > %dx%d-%d\n", var->xres, var->yres, var->bits_per_pixel, var->xres_virtual, var->yres_virtual, fb->width, fb->height, fb->format->cpp[0] * 8); return -EINVAL; } /* * Workaround for SDL 1.2, which is known to be setting all pixel format * fields values to zero in some cases. We treat this situation as a * kind of "use some reasonable autodetected values". */ if (!var->red.offset && !var->green.offset && !var->blue.offset && !var->transp.offset && !var->red.length && !var->green.length && !var->blue.length && !var->transp.length && !var->red.msb_right && !var->green.msb_right && !var->blue.msb_right && !var->transp.msb_right) { drm_fb_helper_fill_pixel_fmt(var, fb->format->depth); } /* * drm fbdev emulation doesn't support changing the pixel format at all, * so reject all pixel format changing requests. */ if (!drm_fb_pixel_format_equal(var, &info->var)) { DRM_DEBUG("fbdev emulation doesn't support changing the pixel format\n"); return -EINVAL; } return 0; } EXPORT_SYMBOL(drm_fb_helper_check_var); /** * drm_fb_helper_set_par - implementation for &fb_ops.fb_set_par * @info: fbdev registered by the helper * * This will let fbcon do the mode init and is called at initialization time by * the fbdev core when registering the driver, and later on through the hotplug * callback. */ int drm_fb_helper_set_par(struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct fb_var_screeninfo *var = &info->var; if (oops_in_progress) return -EBUSY; if (var->pixclock != 0) { DRM_ERROR("PIXEL CLOCK SET\n"); return -EINVAL; } drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); return 0; } EXPORT_SYMBOL(drm_fb_helper_set_par); static void pan_set(struct drm_fb_helper *fb_helper, int x, int y) { int i; for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_mode_set *mode_set; mode_set = &fb_helper->crtc_info[i].mode_set; mode_set->x = x; mode_set->y = y; } } static int pan_display_atomic(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; int ret; pan_set(fb_helper, var->xoffset, var->yoffset); ret = restore_fbdev_mode_atomic(fb_helper, true); if (!ret) { info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; } else pan_set(fb_helper, info->var.xoffset, info->var.yoffset); return ret; } static int pan_display_legacy(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_mode_set *modeset; int ret = 0; int i; drm_modeset_lock_all(fb_helper->dev); for (i = 0; i < fb_helper->crtc_count; i++) { modeset = &fb_helper->crtc_info[i].mode_set; modeset->x = var->xoffset; modeset->y = var->yoffset; if (modeset->num_connectors) { ret = drm_mode_set_config_internal(modeset); if (!ret) { info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; } } } drm_modeset_unlock_all(fb_helper->dev); return ret; } /** * drm_fb_helper_pan_display - implementation for &fb_ops.fb_pan_display * @var: updated screen information * @info: fbdev registered by the helper */ int drm_fb_helper_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct drm_device *dev = fb_helper->dev; int ret; if (oops_in_progress) return -EBUSY; mutex_lock(&fb_helper->lock); if (!drm_fb_helper_is_bound(fb_helper)) { mutex_unlock(&fb_helper->lock); return -EBUSY; } if (drm_drv_uses_atomic_modeset(dev)) ret = pan_display_atomic(var, info); else ret = pan_display_legacy(var, info); mutex_unlock(&fb_helper->lock); return ret; } EXPORT_SYMBOL(drm_fb_helper_pan_display); /* * Allocates the backing storage and sets up the fbdev info structure through * the ->fb_probe callback. */ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, int preferred_bpp) { int ret = 0; int crtc_count = 0; int i; struct drm_fb_helper_surface_size sizes; int gamma_size = 0; memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); sizes.surface_depth = 24; sizes.surface_bpp = 32; sizes.fb_width = (u32)-1; sizes.fb_height = (u32)-1; /* if driver picks 8 or 16 by default use that for both depth/bpp */ if (preferred_bpp != sizes.surface_bpp) sizes.surface_depth = sizes.surface_bpp = preferred_bpp; /* first up get a count of crtcs now in use and new min/maxes width/heights */ drm_fb_helper_for_each_connector(fb_helper, i) { struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; struct drm_cmdline_mode *cmdline_mode; cmdline_mode = &fb_helper_conn->connector->cmdline_mode; if (cmdline_mode->bpp_specified) { switch (cmdline_mode->bpp) { case 8: sizes.surface_depth = sizes.surface_bpp = 8; break; case 15: sizes.surface_depth = 15; sizes.surface_bpp = 16; break; case 16: sizes.surface_depth = sizes.surface_bpp = 16; break; case 24: sizes.surface_depth = sizes.surface_bpp = 24; break; case 32: sizes.surface_depth = 24; sizes.surface_bpp = 32; break; } break; } } crtc_count = 0; for (i = 0; i < fb_helper->crtc_count; i++) { struct drm_display_mode *desired_mode; struct drm_mode_set *mode_set; int x, y, j; /* in case of tile group, are we the last tile vert or horiz? * If no tile group you are always the last one both vertically * and horizontally */ bool lastv = true, lasth = true; desired_mode = fb_helper->crtc_info[i].desired_mode; mode_set = &fb_helper->crtc_info[i].mode_set; if (!desired_mode) continue; crtc_count++; x = fb_helper->crtc_info[i].x; y = fb_helper->crtc_info[i].y; if (gamma_size == 0) gamma_size = fb_helper->crtc_info[i].mode_set.crtc->gamma_size; sizes.surface_width = max_t(u32, desired_mode->hdisplay + x, sizes.surface_width); sizes.surface_height = max_t(u32, desired_mode->vdisplay + y, sizes.surface_height); for (j = 0; j < mode_set->num_connectors; j++) { struct drm_connector *connector = mode_set->connectors[j]; if (connector->has_tile) { lasth = (connector->tile_h_loc == (connector->num_h_tile - 1)); lastv = (connector->tile_v_loc == (connector->num_v_tile - 1)); /* cloning to multiple tiles is just crazy-talk, so: */ break; } } if (lasth) sizes.fb_width = min_t(u32, desired_mode->hdisplay + x, sizes.fb_width); if (lastv) sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); } if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { DRM_INFO("Cannot find any crtc or sizes\n"); /* First time: disable all crtc's.. */ if (!fb_helper->deferred_setup && !READ_ONCE(fb_helper->dev->master)) restore_fbdev_mode(fb_helper); return -EAGAIN; } /* Handle our overallocation */ sizes.surface_height *= drm_fbdev_overalloc; sizes.surface_height /= 100; /* push down into drivers */ ret = (*fb_helper->funcs->fb_probe)(fb_helper, &sizes); if (ret < 0) return ret; strcpy(fb_helper->fb->comm, "[fbcon]"); return 0; } /** * drm_fb_helper_fill_fix - initializes fixed fbdev information * @info: fbdev registered by the helper * @pitch: desired pitch * @depth: desired depth * * Helper to fill in the fixed fbdev information useful for a non-accelerated * fbdev emulations. Drivers which support acceleration methods which impose * additional constraints need to set up their own limits. * * Drivers should call this (or their equivalent setup code) from their * &drm_fb_helper_funcs.fb_probe callback. */ void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch, uint32_t depth) { info->fix.type = FB_TYPE_PACKED_PIXELS; info->fix.visual = depth == 8 ? FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR; info->fix.mmio_start = 0; info->fix.mmio_len = 0; info->fix.type_aux = 0; info->fix.xpanstep = 1; /* doing it in hw */ info->fix.ypanstep = 1; /* doing it in hw */ info->fix.ywrapstep = 0; info->fix.accel = FB_ACCEL_NONE; info->fix.line_length = pitch; } EXPORT_SYMBOL(drm_fb_helper_fill_fix); /** * drm_fb_helper_fill_var - initalizes variable fbdev information * @info: fbdev instance to set up * @fb_helper: fb helper instance to use as template * @fb_width: desired fb width * @fb_height: desired fb height * * Sets up the variable fbdev metainformation from the given fb helper instance * and the drm framebuffer allocated in &drm_fb_helper.fb. * * Drivers should call this (or their equivalent setup code) from their * &drm_fb_helper_funcs.fb_probe callback after having allocated the fbdev * backing storage framebuffer. */ void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper, uint32_t fb_width, uint32_t fb_height) { struct drm_framebuffer *fb = fb_helper->fb; WARN_ON((drm_format_info_block_width(fb->format, 0) > 1) || (drm_format_info_block_height(fb->format, 0) > 1)); info->pseudo_palette = fb_helper->pseudo_palette; info->var.xres_virtual = fb->width; info->var.yres_virtual = fb->height; info->var.bits_per_pixel = fb->format->cpp[0] * 8; info->var.accel_flags = FB_ACCELF_TEXT; info->var.xoffset = 0; info->var.yoffset = 0; info->var.activate = FB_ACTIVATE_NOW; drm_fb_helper_fill_pixel_fmt(&info->var, fb->format->depth); info->var.xres = fb_width; info->var.yres = fb_height; } EXPORT_SYMBOL(drm_fb_helper_fill_var); static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, uint32_t maxX, uint32_t maxY) { struct drm_connector *connector; int i, count = 0; drm_fb_helper_for_each_connector(fb_helper, i) { connector = fb_helper->connector_info[i]->connector; count += connector->funcs->fill_modes(connector, maxX, maxY); } return count; } struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) { struct drm_display_mode *mode; list_for_each_entry(mode, &fb_connector->connector->modes, head) { if (mode->hdisplay > width || mode->vdisplay > height) continue; if (mode->type & DRM_MODE_TYPE_PREFERRED) return mode; } return NULL; } EXPORT_SYMBOL(drm_has_preferred_mode); static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) { return fb_connector->connector->cmdline_mode.specified; } struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn) { struct drm_cmdline_mode *cmdline_mode; struct drm_display_mode *mode; bool prefer_non_interlace; cmdline_mode = &fb_helper_conn->connector->cmdline_mode; if (cmdline_mode->specified == false) return NULL; /* attempt to find a matching mode in the list of modes * we have gotten so far, if not add a CVT mode that conforms */ if (cmdline_mode->rb || cmdline_mode->margins) goto create_mode; prefer_non_interlace = !cmdline_mode->interlace; again: list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { /* check width/height */ if (mode->hdisplay != cmdline_mode->xres || mode->vdisplay != cmdline_mode->yres) continue; if (cmdline_mode->refresh_specified) { if (mode->vrefresh != cmdline_mode->refresh) continue; } if (cmdline_mode->interlace) { if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) continue; } else if (prefer_non_interlace) { if (mode->flags & DRM_MODE_FLAG_INTERLACE) continue; } return mode; } if (prefer_non_interlace) { prefer_non_interlace = false; goto again; } create_mode: mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, cmdline_mode); list_add(&mode->head, &fb_helper_conn->connector->modes); return mode; } EXPORT_SYMBOL(drm_pick_cmdline_mode); static bool drm_connector_enabled(struct drm_connector *connector, bool strict) { bool enable; if (connector->display_info.non_desktop) return false; if (strict) enable = connector->status == connector_status_connected; else enable = connector->status != connector_status_disconnected; return enable; } static void drm_enable_connectors(struct drm_fb_helper *fb_helper, bool *enabled) { bool any_enabled = false; struct drm_connector *connector; int i = 0; drm_fb_helper_for_each_connector(fb_helper, i) { connector = fb_helper->connector_info[i]->connector; enabled[i] = drm_connector_enabled(connector, true); DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no"); any_enabled |= enabled[i]; } if (any_enabled) return; drm_fb_helper_for_each_connector(fb_helper, i) { connector = fb_helper->connector_info[i]->connector; enabled[i] = drm_connector_enabled(connector, false); } } static bool drm_target_cloned(struct drm_fb_helper *fb_helper, struct drm_display_mode **modes, struct drm_fb_offset *offsets, bool *enabled, int width, int height) { int count, i, j; bool can_clone = false; struct drm_fb_helper_connector *fb_helper_conn; struct drm_display_mode *dmt_mode, *mode; /* only contemplate cloning in the single crtc case */ if (fb_helper->crtc_count > 1) return false; count = 0; drm_fb_helper_for_each_connector(fb_helper, i) { if (enabled[i]) count++; } /* only contemplate cloning if more than one connector is enabled */ if (count <= 1) return false; /* check the command line or if nothing common pick 1024x768 */ can_clone = true; drm_fb_helper_for_each_connector(fb_helper, i) { if (!enabled[i]) continue; fb_helper_conn = fb_helper->connector_info[i]; modes[i] = drm_pick_cmdline_mode(fb_helper_conn); if (!modes[i]) { can_clone = false; break; } for (j = 0; j < i; j++) { if (!enabled[j]) continue; if (!drm_mode_match(modes[j], modes[i], DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_CLOCK | DRM_MODE_MATCH_FLAGS | DRM_MODE_MATCH_3D_FLAGS)) can_clone = false; } } if (can_clone) { DRM_DEBUG_KMS("can clone using command line\n"); return true; } /* try and find a 1024x768 mode on each connector */ can_clone = true; dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); drm_fb_helper_for_each_connector(fb_helper, i) { if (!enabled[i]) continue; fb_helper_conn = fb_helper->connector_info[i]; list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { if (drm_mode_match(mode, dmt_mode, DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_CLOCK | DRM_MODE_MATCH_FLAGS | DRM_MODE_MATCH_3D_FLAGS)) modes[i] = mode; } if (!modes[i]) can_clone = false; } if (can_clone) { DRM_DEBUG_KMS("can clone using 1024x768\n"); return true; } DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); return false; } static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, struct drm_display_mode **modes, struct drm_fb_offset *offsets, int idx, int h_idx, int v_idx) { struct drm_fb_helper_connector *fb_helper_conn; int i; int hoffset = 0, voffset = 0; drm_fb_helper_for_each_connector(fb_helper, i) { fb_helper_conn = fb_helper->connector_info[i]; if (!fb_helper_conn->connector->has_tile) continue; if (!modes[i] && (h_idx || v_idx)) { DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, fb_helper_conn->connector->base.id); continue; } if (fb_helper_conn->connector->tile_h_loc < h_idx) hoffset += modes[i]->hdisplay; if (fb_helper_conn->connector->tile_v_loc < v_idx) voffset += modes[i]->vdisplay; } offsets[idx].x = hoffset; offsets[idx].y = voffset; DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); return 0; } static bool drm_target_preferred(struct drm_fb_helper *fb_helper, struct drm_display_mode **modes, struct drm_fb_offset *offsets, bool *enabled, int width, int height) { struct drm_fb_helper_connector *fb_helper_conn; const u64 mask = BIT_ULL(fb_helper->connector_count) - 1; u64 conn_configured = 0; int tile_pass = 0; int i; retry: drm_fb_helper_for_each_connector(fb_helper, i) { fb_helper_conn = fb_helper->connector_info[i]; if (conn_configured & BIT_ULL(i)) continue; if (enabled[i] == false) { conn_configured |= BIT_ULL(i); continue; } /* first pass over all the untiled connectors */ if (tile_pass == 0 && fb_helper_conn->connector->has_tile) continue; if (tile_pass == 1) { if (fb_helper_conn->connector->tile_h_loc != 0 || fb_helper_conn->connector->tile_v_loc != 0) continue; } else { if (fb_helper_conn->connector->tile_h_loc != tile_pass - 1 && fb_helper_conn->connector->tile_v_loc != tile_pass - 1) /* if this tile_pass doesn't cover any of the tiles - keep going */ continue; /* * find the tile offsets for this pass - need to find * all tiles left and above */ drm_get_tile_offsets(fb_helper, modes, offsets, i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); } DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", fb_helper_conn->connector->base.id); /* got for command line mode first */ modes[i] = drm_pick_cmdline_mode(fb_helper_conn); if (!modes[i]) { DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); } /* No preferred modes, pick one off the list */ if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) break; } DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : "none"); conn_configured |= BIT_ULL(i); } if ((conn_configured & mask) != mask) { tile_pass++; goto retry; } return true; } static bool connector_has_possible_crtc(struct drm_connector *connector, struct drm_crtc *crtc) { struct drm_encoder *encoder; int i; drm_connector_for_each_possible_encoder(connector, encoder, i) { if (encoder->possible_crtcs & drm_crtc_mask(crtc)) return true; } return false; } static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, struct drm_fb_helper_crtc **best_crtcs, struct drm_display_mode **modes, int n, int width, int height) { int c, o; struct drm_connector *connector; int my_score, best_score, score; struct drm_fb_helper_crtc **crtcs, *crtc; struct drm_fb_helper_connector *fb_helper_conn; if (n == fb_helper->connector_count) return 0; fb_helper_conn = fb_helper->connector_info[n]; connector = fb_helper_conn->connector; best_crtcs[n] = NULL; best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); if (modes[n] == NULL) return best_score; crtcs = kcalloc(fb_helper->connector_count, sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); if (!crtcs) return best_score; my_score = 1; if (connector->status == connector_status_connected) my_score++; if (drm_has_cmdline_mode(fb_helper_conn)) my_score++; if (drm_has_preferred_mode(fb_helper_conn, width, height)) my_score++; /* * select a crtc for this connector and then attempt to configure * remaining connectors */ for (c = 0; c < fb_helper->crtc_count; c++) { crtc = &fb_helper->crtc_info[c]; if (!connector_has_possible_crtc(connector, crtc->mode_set.crtc)) continue; for (o = 0; o < n; o++) if (best_crtcs[o] == crtc) break; if (o < n) { /* ignore cloning unless only a single crtc */ if (fb_helper->crtc_count > 1) continue; if (!drm_mode_equal(modes[o], modes[n])) continue; } crtcs[n] = crtc; memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, width, height); if (score > best_score) { best_score = score; memcpy(best_crtcs, crtcs, fb_helper->connector_count * sizeof(struct drm_fb_helper_crtc *)); } } kfree(crtcs); return best_score; } /* * This function checks if rotation is necessary because of panel orientation * and if it is, if it is supported. * If rotation is necessary and supported, its gets set in fb_crtc.rotation. * If rotation is necessary but not supported, a DRM_MODE_ROTATE_* flag gets * or-ed into fb_helper->sw_rotations. In drm_setup_crtcs_fb() we check if only * one bit is set and then we set fb_info.fbcon_rotate_hint to make fbcon do * the unsupported rotation. */ static void drm_setup_crtc_rotation(struct drm_fb_helper *fb_helper, struct drm_fb_helper_crtc *fb_crtc, struct drm_connector *connector) { struct drm_plane *plane = fb_crtc->mode_set.crtc->primary; uint64_t valid_mask = 0; int i, rotation; fb_crtc->rotation = DRM_MODE_ROTATE_0; switch (connector->display_info.panel_orientation) { case DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP: rotation = DRM_MODE_ROTATE_180; break; case DRM_MODE_PANEL_ORIENTATION_LEFT_UP: rotation = DRM_MODE_ROTATE_90; break; case DRM_MODE_PANEL_ORIENTATION_RIGHT_UP: rotation = DRM_MODE_ROTATE_270; break; default: rotation = DRM_MODE_ROTATE_0; } /* * TODO: support 90 / 270 degree hardware rotation, * depending on the hardware this may require the framebuffer * to be in a specific tiling format. */ if (rotation != DRM_MODE_ROTATE_180 || !plane->rotation_property) { fb_helper->sw_rotations |= rotation; return; } for (i = 0; i < plane->rotation_property->num_values; i++) valid_mask |= (1ULL << plane->rotation_property->values[i]); if (!(rotation & valid_mask)) { fb_helper->sw_rotations |= rotation; return; } fb_crtc->rotation = rotation; /* Rotating in hardware, fbcon should not rotate */ fb_helper->sw_rotations |= DRM_MODE_ROTATE_0; } static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, u32 width, u32 height) { struct drm_device *dev = fb_helper->dev; struct drm_fb_helper_crtc **crtcs; struct drm_display_mode **modes; struct drm_fb_offset *offsets; bool *enabled; int i; DRM_DEBUG_KMS("\n"); /* prevent concurrent modification of connector_count by hotplug */ lockdep_assert_held(&fb_helper->lock); crtcs = kcalloc(fb_helper->connector_count, sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); modes = kcalloc(fb_helper->connector_count, sizeof(struct drm_display_mode *), GFP_KERNEL); offsets = kcalloc(fb_helper->connector_count, sizeof(struct drm_fb_offset), GFP_KERNEL); enabled = kcalloc(fb_helper->connector_count, sizeof(bool), GFP_KERNEL); if (!crtcs || !modes || !enabled || !offsets) { DRM_ERROR("Memory allocation failed\n"); goto out; } mutex_lock(&fb_helper->dev->mode_config.mutex); if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) DRM_DEBUG_KMS("No connectors reported connected with modes\n"); drm_enable_connectors(fb_helper, enabled); if (!(fb_helper->funcs->initial_config && fb_helper->funcs->initial_config(fb_helper, crtcs, modes, offsets, enabled, width, height))) { memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); if (!drm_target_cloned(fb_helper, modes, offsets, enabled, width, height) && !drm_target_preferred(fb_helper, modes, offsets, enabled, width, height)) DRM_ERROR("Unable to find initial modes\n"); DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height); drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); } mutex_unlock(&fb_helper->dev->mode_config.mutex); /* need to set the modesets up here for use later */ /* fill out the connector<->crtc mappings into the modesets */ for (i = 0; i < fb_helper->crtc_count; i++) drm_fb_helper_modeset_release(fb_helper, &fb_helper->crtc_info[i].mode_set); fb_helper->sw_rotations = 0; drm_fb_helper_for_each_connector(fb_helper, i) { struct drm_display_mode *mode = modes[i]; struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; struct drm_fb_offset *offset = &offsets[i]; if (mode && fb_crtc) { struct drm_mode_set *modeset = &fb_crtc->mode_set; struct drm_connector *connector = fb_helper->connector_info[i]->connector; DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); fb_crtc->desired_mode = mode; fb_crtc->x = offset->x; fb_crtc->y = offset->y; modeset->mode = drm_mode_duplicate(dev, fb_crtc->desired_mode); drm_connector_get(connector); drm_setup_crtc_rotation(fb_helper, fb_crtc, connector); modeset->connectors[modeset->num_connectors++] = connector; modeset->x = offset->x; modeset->y = offset->y; } } out: kfree(crtcs); kfree(modes); kfree(offsets); kfree(enabled); } /* * This is a continuation of drm_setup_crtcs() that sets up anything related * to the framebuffer. During initialization, drm_setup_crtcs() is called before * the framebuffer has been allocated (fb_helper->fb and fb_helper->fbdev). * So, any setup that touches those fields needs to be done here instead of in * drm_setup_crtcs(). */ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) { struct fb_info *info = fb_helper->fbdev; int i; for (i = 0; i < fb_helper->crtc_count; i++) if (fb_helper->crtc_info[i].mode_set.num_connectors) fb_helper->crtc_info[i].mode_set.fb = fb_helper->fb; mutex_lock(&fb_helper->dev->mode_config.mutex); drm_fb_helper_for_each_connector(fb_helper, i) { struct drm_connector *connector = fb_helper->connector_info[i]->connector; /* use first connected connector for the physical dimensions */ if (connector->status == connector_status_connected) { info->var.width = connector->display_info.width_mm; info->var.height = connector->display_info.height_mm; break; } } mutex_unlock(&fb_helper->dev->mode_config.mutex); switch (fb_helper->sw_rotations) { case DRM_MODE_ROTATE_0: info->fbcon_rotate_hint = FB_ROTATE_UR; break; case DRM_MODE_ROTATE_90: info->fbcon_rotate_hint = FB_ROTATE_CCW; break; case DRM_MODE_ROTATE_180: info->fbcon_rotate_hint = FB_ROTATE_UD; break; case DRM_MODE_ROTATE_270: info->fbcon_rotate_hint = FB_ROTATE_CW; break; default: /* * Multiple bits are set / multiple rotations requested * fbcon cannot handle separate rotation settings per * output, so fallback to unrotated. */ info->fbcon_rotate_hint = FB_ROTATE_UR; } } /* Note: Drops fb_helper->lock before returning. */ static int __drm_fb_helper_initial_config_and_unlock(struct drm_fb_helper *fb_helper, int bpp_sel) { struct drm_device *dev = fb_helper->dev; struct fb_info *info; unsigned int width, height; int ret; width = dev->mode_config.max_width; height = dev->mode_config.max_height; drm_setup_crtcs(fb_helper, width, height); ret = drm_fb_helper_single_fb_probe(fb_helper, bpp_sel); if (ret < 0) { if (ret == -EAGAIN) { fb_helper->preferred_bpp = bpp_sel; fb_helper->deferred_setup = true; ret = 0; } mutex_unlock(&fb_helper->lock); return ret; } drm_setup_crtcs_fb(fb_helper); fb_helper->deferred_setup = false; info = fb_helper->fbdev; info->var.pixclock = 0; /* Shamelessly allow physical address leaking to userspace */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) if (!drm_leak_fbdev_smem) #endif /* don't leak any physical addresses to userspace */ info->flags |= FBINFO_HIDE_SMEM_START; /* Need to drop locks to avoid recursive deadlock in * register_framebuffer. This is ok because the only thing left to do is * register the fbdev emulation instance in kernel_fb_helper_list. */ mutex_unlock(&fb_helper->lock); ret = register_framebuffer(info); if (ret < 0) return ret; dev_info(dev->dev, "fb%d: %s frame buffer device\n", info->node, info->fix.id); mutex_lock(&kernel_fb_helper_lock); if (list_empty(&kernel_fb_helper_list)) register_sysrq_key('v', &sysrq_drm_fb_helper_restore_op); list_add(&fb_helper->kernel_fb_list, &kernel_fb_helper_list); mutex_unlock(&kernel_fb_helper_lock); return 0; } /** * drm_fb_helper_initial_config - setup a sane initial connector configuration * @fb_helper: fb_helper device struct * @bpp_sel: bpp value to use for the framebuffer configuration * * Scans the CRTCs and connectors and tries to put together an initial setup. * At the moment, this is a cloned configuration across all heads with * a new framebuffer object as the backing store. * * Note that this also registers the fbdev and so allows userspace to call into * the driver through the fbdev interfaces. * * This function will call down into the &drm_fb_helper_funcs.fb_probe callback * to let the driver allocate and initialize the fbdev info structure and the * drm framebuffer used to back the fbdev. drm_fb_helper_fill_var() and * drm_fb_helper_fill_fix() are provided as helpers to setup simple default * values for the fbdev info structure. * * HANG DEBUGGING: * * When you have fbcon support built-in or already loaded, this function will do * a full modeset to setup the fbdev console. Due to locking misdesign in the * VT/fbdev subsystem that entire modeset sequence has to be done while holding * console_lock. Until console_unlock is called no dmesg lines will be sent out * to consoles, not even serial console. This means when your driver crashes, * you will see absolutely nothing else but a system stuck in this function, * with no further output. Any kind of printk() you place within your own driver * or in the drm core modeset code will also never show up. * * Standard debug practice is to run the fbcon setup without taking the * console_lock as a hack, to be able to see backtraces and crashes on the * serial line. This can be done by setting the fb.lockless_register_fb=1 kernel * cmdline option. * * The other option is to just disable fbdev emulation since very likely the * first modeset from userspace will crash in the same way, and is even easier * to debug. This can be done by setting the drm_kms_helper.fbdev_emulation=0 * kernel cmdline option. * * RETURNS: * Zero if everything went ok, nonzero otherwise. */ int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel) { int ret; if (!drm_fbdev_emulation) return 0; mutex_lock(&fb_helper->lock); ret = __drm_fb_helper_initial_config_and_unlock(fb_helper, bpp_sel); return ret; } EXPORT_SYMBOL(drm_fb_helper_initial_config); /** * drm_fb_helper_hotplug_event - respond to a hotplug notification by * probing all the outputs attached to the fb * @fb_helper: driver-allocated fbdev helper, can be NULL * * Scan the connectors attached to the fb_helper and try to put together a * setup after notification of a change in output configuration. * * Called at runtime, takes the mode config locks to be able to check/change the * modeset configuration. Must be run from process context (which usually means * either the output polling work or a work item launched from the driver's * hotplug interrupt). * * Note that drivers may call this even before calling * drm_fb_helper_initial_config but only after drm_fb_helper_init. This allows * for a race-free fbcon setup and will make sure that the fbdev emulation will * not miss any hotplug events. * * RETURNS: * 0 on success and a non-zero error code otherwise. */ int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper) { int err = 0; if (!drm_fbdev_emulation || !fb_helper) return 0; mutex_lock(&fb_helper->lock); if (fb_helper->deferred_setup) { err = __drm_fb_helper_initial_config_and_unlock(fb_helper, fb_helper->preferred_bpp); return err; } if (!fb_helper->fb || !drm_fb_helper_is_bound(fb_helper)) { fb_helper->delayed_hotplug = true; mutex_unlock(&fb_helper->lock); return err; } DRM_DEBUG_KMS("\n"); drm_setup_crtcs(fb_helper, fb_helper->fb->width, fb_helper->fb->height); drm_setup_crtcs_fb(fb_helper); mutex_unlock(&fb_helper->lock); drm_fb_helper_set_par(fb_helper->fbdev); return 0; } EXPORT_SYMBOL(drm_fb_helper_hotplug_event); /** * drm_fb_helper_fbdev_setup() - Setup fbdev emulation * @dev: DRM device * @fb_helper: fbdev helper structure to set up * @funcs: fbdev helper functions * @preferred_bpp: Preferred bits per pixel for the device. * @dev->mode_config.preferred_depth is used if this is zero. * @max_conn_count: Maximum number of connectors. * @dev->mode_config.num_connector is used if this is zero. * * This function sets up fbdev emulation and registers fbdev for access by * userspace. If all connectors are disconnected, setup is deferred to the next * time drm_fb_helper_hotplug_event() is called. * The caller must to provide a &drm_fb_helper_funcs->fb_probe callback * function. * * Use drm_fb_helper_fbdev_teardown() to destroy the fbdev. * * See also: drm_fb_helper_initial_config(), drm_fbdev_generic_setup(). * * Returns: * Zero on success or negative error code on failure. */ int drm_fb_helper_fbdev_setup(struct drm_device *dev, struct drm_fb_helper *fb_helper, const struct drm_fb_helper_funcs *funcs, unsigned int preferred_bpp, unsigned int max_conn_count) { int ret; if (!preferred_bpp) preferred_bpp = dev->mode_config.preferred_depth; if (!preferred_bpp) preferred_bpp = 32; if (!max_conn_count) max_conn_count = dev->mode_config.num_connector; if (!max_conn_count) { DRM_DEV_ERROR(dev->dev, "fbdev: No connectors\n"); return -EINVAL; } drm_fb_helper_prepare(dev, fb_helper, funcs); ret = drm_fb_helper_init(dev, fb_helper, max_conn_count); if (ret < 0) { DRM_DEV_ERROR(dev->dev, "fbdev: Failed to initialize (ret=%d)\n", ret); return ret; } ret = drm_fb_helper_single_add_all_connectors(fb_helper); if (ret < 0) { DRM_DEV_ERROR(dev->dev, "fbdev: Failed to add connectors (ret=%d)\n", ret); goto err_drm_fb_helper_fini; } if (!drm_drv_uses_atomic_modeset(dev)) drm_helper_disable_unused_functions(dev); ret = drm_fb_helper_initial_config(fb_helper, preferred_bpp); if (ret < 0) { DRM_DEV_ERROR(dev->dev, "fbdev: Failed to set configuration (ret=%d)\n", ret); goto err_drm_fb_helper_fini; } return 0; err_drm_fb_helper_fini: drm_fb_helper_fini(fb_helper); return ret; } EXPORT_SYMBOL(drm_fb_helper_fbdev_setup); /** * drm_fb_helper_fbdev_teardown - Tear down fbdev emulation * @dev: DRM device * * This function unregisters fbdev if not already done and cleans up the * associated resources including the &drm_framebuffer. * The driver is responsible for freeing the &drm_fb_helper structure which is * stored in &drm_device->fb_helper. Do note that this pointer has been cleared * when this function returns. * * In order to support device removal/unplug while file handles are still open, * drm_fb_helper_unregister_fbi() should be called on device removal and * drm_fb_helper_fbdev_teardown() in the &drm_driver->release callback when * file handles are closed. */ void drm_fb_helper_fbdev_teardown(struct drm_device *dev) { struct drm_fb_helper *fb_helper = dev->fb_helper; struct fb_ops *fbops = NULL; if (!fb_helper) return; /* Unregister if it hasn't been done already */ if (fb_helper->fbdev && fb_helper->fbdev->dev) drm_fb_helper_unregister_fbi(fb_helper); if (fb_helper->fbdev && fb_helper->fbdev->fbdefio) { fb_deferred_io_cleanup(fb_helper->fbdev); kfree(fb_helper->fbdev->fbdefio); fbops = fb_helper->fbdev->fbops; } drm_fb_helper_fini(fb_helper); kfree(fbops); if (fb_helper->fb) drm_framebuffer_remove(fb_helper->fb); } EXPORT_SYMBOL(drm_fb_helper_fbdev_teardown); /** * drm_fb_helper_lastclose - DRM driver lastclose helper for fbdev emulation * @dev: DRM device * * This function can be used as the &drm_driver->lastclose callback for drivers * that only need to call drm_fb_helper_restore_fbdev_mode_unlocked(). */ void drm_fb_helper_lastclose(struct drm_device *dev) { drm_fb_helper_restore_fbdev_mode_unlocked(dev->fb_helper); } EXPORT_SYMBOL(drm_fb_helper_lastclose); /** * drm_fb_helper_output_poll_changed - DRM mode config \.output_poll_changed * helper for fbdev emulation * @dev: DRM device * * This function can be used as the * &drm_mode_config_funcs.output_poll_changed callback for drivers that only * need to call drm_fb_helper_hotplug_event(). */ void drm_fb_helper_output_poll_changed(struct drm_device *dev) { drm_fb_helper_hotplug_event(dev->fb_helper); } EXPORT_SYMBOL(drm_fb_helper_output_poll_changed); /* @user: 1=userspace, 0=fbcon */ static int drm_fbdev_fb_open(struct fb_info *info, int user) { struct drm_fb_helper *fb_helper = info->par; if (!try_module_get(fb_helper->dev->driver->fops->owner)) return -ENODEV; return 0; } static int drm_fbdev_fb_release(struct fb_info *info, int user) { struct drm_fb_helper *fb_helper = info->par; module_put(fb_helper->dev->driver->fops->owner); return 0; } /* * fb_ops.fb_destroy is called by the last put_fb_info() call at the end of * unregister_framebuffer() or fb_release(). */ static void drm_fbdev_fb_destroy(struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; struct fb_info *fbi = fb_helper->fbdev; struct fb_ops *fbops = NULL; void *shadow = NULL; if (fbi->fbdefio) { fb_deferred_io_cleanup(fbi); shadow = fbi->screen_buffer; fbops = fbi->fbops; } drm_fb_helper_fini(fb_helper); if (shadow) { vfree(shadow); kfree(fbops); } drm_client_framebuffer_delete(fb_helper->buffer); /* * FIXME: * Remove conditional when all CMA drivers have been moved over to using * drm_fbdev_generic_setup(). */ if (fb_helper->client.funcs) { drm_client_release(&fb_helper->client); kfree(fb_helper); } } static int drm_fbdev_fb_mmap(struct fb_info *info, struct vm_area_struct *vma) { struct drm_fb_helper *fb_helper = info->par; if (fb_helper->dev->driver->gem_prime_mmap) return fb_helper->dev->driver->gem_prime_mmap(fb_helper->buffer->gem, vma); else return -ENODEV; } static struct fb_ops drm_fbdev_fb_ops = { .owner = THIS_MODULE, DRM_FB_HELPER_DEFAULT_OPS, .fb_open = drm_fbdev_fb_open, .fb_release = drm_fbdev_fb_release, .fb_destroy = drm_fbdev_fb_destroy, .fb_mmap = drm_fbdev_fb_mmap, .fb_read = drm_fb_helper_sys_read, .fb_write = drm_fb_helper_sys_write, .fb_fillrect = drm_fb_helper_sys_fillrect, .fb_copyarea = drm_fb_helper_sys_copyarea, .fb_imageblit = drm_fb_helper_sys_imageblit, }; static struct fb_deferred_io drm_fbdev_defio = { .delay = HZ / 20, .deferred_io = drm_fb_helper_deferred_io, }; /** * drm_fb_helper_generic_probe - Generic fbdev emulation probe helper * @fb_helper: fbdev helper structure * @sizes: describes fbdev size and scanout surface size * * This function uses the client API to create a framebuffer backed by a dumb buffer. * * The _sys_ versions are used for &fb_ops.fb_read, fb_write, fb_fillrect, * fb_copyarea, fb_imageblit. * * Returns: * Zero on success or negative error code on failure. */ int drm_fb_helper_generic_probe(struct drm_fb_helper *fb_helper, struct drm_fb_helper_surface_size *sizes) { struct drm_client_dev *client = &fb_helper->client; struct drm_client_buffer *buffer; struct drm_framebuffer *fb; struct fb_info *fbi; u32 format; int ret; DRM_DEBUG_KMS("surface width(%d), height(%d) and bpp(%d)\n", sizes->surface_width, sizes->surface_height, sizes->surface_bpp); format = drm_mode_legacy_fb_format(sizes->surface_bpp, sizes->surface_depth); buffer = drm_client_framebuffer_create(client, sizes->surface_width, sizes->surface_height, format); if (IS_ERR(buffer)) return PTR_ERR(buffer); fb_helper->buffer = buffer; fb_helper->fb = buffer->fb; fb = buffer->fb; fbi = drm_fb_helper_alloc_fbi(fb_helper); if (IS_ERR(fbi)) { ret = PTR_ERR(fbi); goto err_free_buffer; } fbi->par = fb_helper; fbi->fbops = &drm_fbdev_fb_ops; fbi->screen_size = fb->height * fb->pitches[0]; fbi->fix.smem_len = fbi->screen_size; fbi->screen_buffer = buffer->vaddr; /* Shamelessly leak the physical address to user-space */ #if IS_ENABLED(CONFIG_DRM_FBDEV_LEAK_PHYS_SMEM) if (drm_leak_fbdev_smem && fbi->fix.smem_start == 0) fbi->fix.smem_start = page_to_phys(virt_to_page(fbi->screen_buffer)); #endif strcpy(fbi->fix.id, "DRM emulated"); drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->format->depth); drm_fb_helper_fill_var(fbi, fb_helper, sizes->fb_width, sizes->fb_height); if (fb->funcs->dirty) { struct fb_ops *fbops; void *shadow; /* * fb_deferred_io_cleanup() clears &fbops->fb_mmap so a per * instance version is necessary. */ fbops = kzalloc(sizeof(*fbops), GFP_KERNEL); shadow = vzalloc(fbi->screen_size); if (!fbops || !shadow) { kfree(fbops); vfree(shadow); ret = -ENOMEM; goto err_fb_info_destroy; } *fbops = *fbi->fbops; fbi->fbops = fbops; fbi->screen_buffer = shadow; fbi->fbdefio = &drm_fbdev_defio; fb_deferred_io_init(fbi); } return 0; err_fb_info_destroy: drm_fb_helper_fini(fb_helper); err_free_buffer: drm_client_framebuffer_delete(buffer); return ret; } EXPORT_SYMBOL(drm_fb_helper_generic_probe); static const struct drm_fb_helper_funcs drm_fb_helper_generic_funcs = { .fb_probe = drm_fb_helper_generic_probe, }; static void drm_fbdev_client_unregister(struct drm_client_dev *client) { struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); if (fb_helper->fbdev) { drm_fb_helper_unregister_fbi(fb_helper); /* drm_fbdev_fb_destroy() takes care of cleanup */ return; } /* Did drm_fb_helper_fbdev_setup() run? */ if (fb_helper->dev) drm_fb_helper_fini(fb_helper); drm_client_release(client); kfree(fb_helper); } static int drm_fbdev_client_restore(struct drm_client_dev *client) { struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); drm_fb_helper_restore_fbdev_mode_unlocked(fb_helper); return 0; } static int drm_fbdev_client_hotplug(struct drm_client_dev *client) { struct drm_fb_helper *fb_helper = drm_fb_helper_from_client(client); struct drm_device *dev = client->dev; int ret; /* If drm_fb_helper_fbdev_setup() failed, we only try once */ if (!fb_helper->dev && fb_helper->funcs) return 0; if (dev->fb_helper) return drm_fb_helper_hotplug_event(dev->fb_helper); if (!dev->mode_config.num_connector) { DRM_DEV_DEBUG(dev->dev, "No connectors found, will not create framebuffer!\n"); return 0; } ret = drm_fb_helper_fbdev_setup(dev, fb_helper, &drm_fb_helper_generic_funcs, fb_helper->preferred_bpp, 0); if (ret) { fb_helper->dev = NULL; fb_helper->fbdev = NULL; return ret; } return 0; } static const struct drm_client_funcs drm_fbdev_client_funcs = { .owner = THIS_MODULE, .unregister = drm_fbdev_client_unregister, .restore = drm_fbdev_client_restore, .hotplug = drm_fbdev_client_hotplug, }; /** * drm_fbdev_generic_setup() - Setup generic fbdev emulation * @dev: DRM device * @preferred_bpp: Preferred bits per pixel for the device. * @dev->mode_config.preferred_depth is used if this is zero. * * This function sets up generic fbdev emulation for drivers that supports * dumb buffers with a virtual address and that can be mmap'ed. If the driver * does not support these functions, it could use drm_fb_helper_fbdev_setup(). * * Restore, hotplug events and teardown are all taken care of. Drivers that do * suspend/resume need to call drm_fb_helper_set_suspend_unlocked() themselves. * Simple drivers might use drm_mode_config_helper_suspend(). * * Drivers that set the dirty callback on their framebuffer will get a shadow * fbdev buffer that is blitted onto the real buffer. This is done in order to * make deferred I/O work with all kinds of buffers. * * This function is safe to call even when there are no connectors present. * Setup will be retried on the next hotplug event. * * The fbdev is destroyed by drm_dev_unregister(). * * Returns: * Zero on success or negative error code on failure. */ int drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp) { struct drm_fb_helper *fb_helper; int ret; WARN(dev->fb_helper, "fb_helper is already set!\n"); if (!drm_fbdev_emulation) return 0; fb_helper = kzalloc(sizeof(*fb_helper), GFP_KERNEL); if (!fb_helper) return -ENOMEM; ret = drm_client_init(dev, &fb_helper->client, "fbdev", &drm_fbdev_client_funcs); if (ret) { kfree(fb_helper); DRM_DEV_ERROR(dev->dev, "Failed to register client: %d\n", ret); return ret; } drm_client_add(&fb_helper->client); fb_helper->preferred_bpp = preferred_bpp; ret = drm_fbdev_client_hotplug(&fb_helper->client); if (ret) DRM_DEV_DEBUG(dev->dev, "client hotplug ret=%d\n", ret); return 0; } EXPORT_SYMBOL(drm_fbdev_generic_setup); /* The Kconfig DRM_KMS_HELPER selects FRAMEBUFFER_CONSOLE (if !EXPERT) * but the module doesn't depend on any fb console symbols. At least * attempt to load fbcon to avoid leaving the system without a usable console. */ int __init drm_fb_helper_modinit(void) { #if defined(CONFIG_FRAMEBUFFER_CONSOLE_MODULE) && !defined(CONFIG_EXPERT) const char name[] = "fbcon"; struct module *fbcon; mutex_lock(&module_mutex); fbcon = find_module(name); mutex_unlock(&module_mutex); if (!fbcon) request_module_nowait(name); #endif return 0; } EXPORT_SYMBOL(drm_fb_helper_modinit);
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1