Release 4.11 drivers/gpu/drm/drm_crtc_helper.c
/*
* Copyright (c) 2006-2008 Intel Corporation
* Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
*
* DRM core CRTC related 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:
* Keith Packard
* Eric Anholt <eric@anholt.net>
* Dave Airlie <airlied@linux.ie>
* Jesse Barnes <jesse.barnes@intel.com>
*/
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/moduleparam.h>
#include <drm/drmP.h>
#include <drm/drm_atomic.h>
#include <drm/drm_crtc.h>
#include <drm/drm_encoder.h>
#include <drm/drm_fourcc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_plane_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_edid.h>
/**
* DOC: overview
*
* The CRTC modeset helper library provides a default set_config implementation
* in drm_crtc_helper_set_config(). Plus a few other convenience functions using
* the same callbacks which drivers can use to e.g. restore the modeset
* configuration on resume with drm_helper_resume_force_mode().
*
* Note that this helper library doesn't track the current power state of CRTCs
* and encoders. It can call callbacks like &drm_encoder_helper_funcs.dpms even
* though the hardware is already in the desired state. This deficiency has been
* fixed in the atomic helpers.
*
* The driver callbacks are mostly compatible with the atomic modeset helpers,
* except for the handling of the primary plane: Atomic helpers require that the
* primary plane is implemented as a real standalone plane and not directly tied
* to the CRTC state. For easier transition this library provides functions to
* implement the old semantics required by the CRTC helpers using the new plane
* and atomic helper callbacks.
*
* Drivers are strongly urged to convert to the atomic helpers (by way of first
* converting to the plane helpers). New drivers must not use these functions
* but need to implement the atomic interface instead, potentially using the
* atomic helpers for that.
*
* These legacy modeset helpers use the same function table structures as
* all other modesetting helpers. See the documentation for struct
* &drm_crtc_helper_funcs, &struct drm_encoder_helper_funcs and struct
* &drm_connector_helper_funcs.
*/
/**
* drm_helper_encoder_in_use - check if a given encoder is in use
* @encoder: encoder to check
*
* Checks whether @encoder is with the current mode setting output configuration
* in use by any connector. This doesn't mean that it is actually enabled since
* the DPMS state is tracked separately.
*
* Returns:
* True if @encoder is used, false otherwise.
*/
bool drm_helper_encoder_in_use(struct drm_encoder *encoder)
{
struct drm_connector *connector;
struct drm_connector_list_iter conn_iter;
struct drm_device *dev = encoder->dev;
/*
* We can expect this mutex to be locked if we are not panicking.
* Locking is currently fubar in the panic handler.
*/
if (!oops_in_progress) {
WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
}
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->encoder == encoder) {
drm_connector_list_iter_put(&conn_iter);
return true;
}
}
drm_connector_list_iter_put(&conn_iter);
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 83 | 76.85% | 3 | 37.50% |
| Yakui Zhao | 12 | 11.11% | 1 | 12.50% |
| Sergei Antonov | 6 | 5.56% | 1 | 12.50% |
| Damien Lespiau | 4 | 3.70% | 1 | 12.50% |
| Dave Airlie | 2 | 1.85% | 1 | 12.50% |
| Rob Clark | 1 | 0.93% | 1 | 12.50% |
| Total | 108 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(drm_helper_encoder_in_use);
/**
* drm_helper_crtc_in_use - check if a given CRTC is in a mode_config
* @crtc: CRTC to check
*
* Checks whether @crtc is with the current mode setting output configuration
* in use by any connector. This doesn't mean that it is actually enabled since
* the DPMS state is tracked separately.
*
* Returns:
* True if @crtc is used, false otherwise.
*/
bool drm_helper_crtc_in_use(struct drm_crtc *crtc)
{
struct drm_encoder *encoder;
struct drm_device *dev = crtc->dev;
/*
* We can expect this mutex to be locked if we are not panicking.
* Locking is currently fubar in the panic handler.
*/
if (!oops_in_progress)
WARN_ON(!mutex_is_locked(&dev->mode_config.mutex));
drm_for_each_encoder(encoder, dev)
if (encoder->crtc == crtc && drm_helper_encoder_in_use(encoder))
return true;
return false;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 43 | 62.32% | 3 | 42.86% |
| Dave Airlie | 19 | 27.54% | 2 | 28.57% |
| Sergei Antonov | 6 | 8.70% | 1 | 14.29% |
| Damien Lespiau | 1 | 1.45% | 1 | 14.29% |
| Total | 69 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(drm_helper_crtc_in_use);
static void
drm_encoder_disable(struct drm_encoder *encoder)
{
const struct drm_encoder_helper_funcs *encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
return;
drm_bridge_disable(encoder->bridge);
if (encoder_funcs->disable)
(*encoder_funcs->disable)(encoder);
else if (encoder_funcs->dpms)
(*encoder_funcs->dpms)(encoder, DRM_MODE_DPMS_OFF);
drm_bridge_post_disable(encoder->bridge);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 41 | 53.95% | 1 | 12.50% |
| Dave Airlie | 15 | 19.74% | 2 | 25.00% |
| Noralf Trönnes | 13 | 17.11% | 1 | 12.50% |
| Yakui Zhao | 3 | 3.95% | 1 | 12.50% |
| Archit Taneja | 2 | 2.63% | 1 | 12.50% |
| Chris Wilson | 1 | 1.32% | 1 | 12.50% |
| Jani Nikula | 1 | 1.32% | 1 | 12.50% |
| Total | 76 | 100.00% | 8 | 100.00% |
static void __drm_helper_disable_unused_functions(struct drm_device *dev)
{
struct drm_encoder *encoder;
struct drm_crtc *crtc;
drm_warn_on_modeset_not_all_locked(dev);
drm_for_each_encoder(encoder, dev) {
if (!drm_helper_encoder_in_use(encoder)) {
drm_encoder_disable(encoder);
/* disconnect encoder from any connector */
encoder->crtc = NULL;
}
}
drm_for_each_crtc(crtc, dev) {
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
crtc->enabled = drm_helper_crtc_in_use(crtc);
if (!crtc->enabled) {
if (crtc_funcs->disable)
(*crtc_funcs->disable)(crtc);
else
(*crtc_funcs->dpms)(crtc, DRM_MODE_DPMS_OFF);
crtc->primary->fb = NULL;
}
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 91 | 70.54% | 2 | 25.00% |
| Dave Airlie | 19 | 14.73% | 1 | 12.50% |
| Yakui Zhao | 13 | 10.08% | 2 | 25.00% |
| Damien Lespiau | 4 | 3.10% | 1 | 12.50% |
| Rob Clark | 1 | 0.78% | 1 | 12.50% |
| Jani Nikula | 1 | 0.78% | 1 | 12.50% |
| Total | 129 | 100.00% | 8 | 100.00% |
/**
* drm_helper_disable_unused_functions - disable unused objects
* @dev: DRM device
*
* This function walks through the entire mode setting configuration of @dev. It
* will remove any CRTC links of unused encoders and encoder links of
* disconnected connectors. Then it will disable all unused encoders and CRTCs
* either by calling their disable callback if available or by calling their
* dpms callback with DRM_MODE_DPMS_OFF.
*
* NOTE:
*
* This function is part of the legacy modeset helper library and will cause
* major confusion with atomic drivers. This is because atomic helpers guarantee
* to never call ->disable() hooks on a disabled function, or ->enable() hooks
* on an enabled functions. drm_helper_disable_unused_functions() on the other
* hand throws such guarantees into the wind and calls disable hooks
* unconditionally on unused functions.
*/
void drm_helper_disable_unused_functions(struct drm_device *dev)
{
if (drm_core_check_feature(dev, DRIVER_ATOMIC))
DRM_ERROR("Called for atomic driver, this is not what you want.\n");
drm_modeset_lock_all(dev);
__drm_helper_disable_unused_functions(dev);
drm_modeset_unlock_all(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 28 | 71.79% | 2 | 66.67% |
| Dave Airlie | 11 | 28.21% | 1 | 33.33% |
| Total | 39 | 100.00% | 3 | 100.00% |
EXPORT_SYMBOL(drm_helper_disable_unused_functions);
/*
* Check the CRTC we're going to map each output to vs. its current
* CRTC. If they don't match, we have to disable the output and the CRTC
* since the driver will have to re-route things.
*/
static void
drm_crtc_prepare_encoders(struct drm_device *dev)
{
const struct drm_encoder_helper_funcs *encoder_funcs;
struct drm_encoder *encoder;
drm_for_each_encoder(encoder, dev) {
encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
continue;
/* Disable unused encoders */
if (encoder->crtc == NULL)
drm_encoder_disable(encoder);
/* Disable encoders whose CRTC is about to change */
if (encoder_funcs->get_crtc &&
encoder->crtc != (*encoder_funcs->get_crtc)(encoder))
drm_encoder_disable(encoder);
}
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 51 | 62.20% | 2 | 40.00% |
| Keith Packard | 24 | 29.27% | 1 | 20.00% |
| Noralf Trönnes | 6 | 7.32% | 1 | 20.00% |
| Jani Nikula | 1 | 1.22% | 1 | 20.00% |
| Total | 82 | 100.00% | 5 | 100.00% |
/**
* drm_crtc_helper_set_mode - internal helper to set a mode
* @crtc: CRTC to program
* @mode: mode to use
* @x: horizontal offset into the surface
* @y: vertical offset into the surface
* @old_fb: old framebuffer, for cleanup
*
* Try to set @mode on @crtc. Give @crtc and its associated connectors a chance
* to fixup or reject the mode prior to trying to set it. This is an internal
* helper that drivers could e.g. use to update properties that require the
* entire output pipe to be disabled and re-enabled in a new configuration. For
* example for changing whether audio is enabled on a hdmi link or for changing
* panel fitter or dither attributes. It is also called by the
* drm_crtc_helper_set_config() helper function to drive the mode setting
* sequence.
*
* Returns:
* True if the mode was set successfully, false otherwise.
*/
bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
struct drm_display_mode *mode,
int x, int y,
struct drm_framebuffer *old_fb)
{
struct drm_device *dev = crtc->dev;
struct drm_display_mode *adjusted_mode, saved_mode, saved_hwmode;
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
const struct drm_encoder_helper_funcs *encoder_funcs;
int saved_x, saved_y;
bool saved_enabled;
struct drm_encoder *encoder;
bool ret = true;
drm_warn_on_modeset_not_all_locked(dev);
saved_enabled = crtc->enabled;
crtc->enabled = drm_helper_crtc_in_use(crtc);
if (!crtc->enabled)
return true;
adjusted_mode = drm_mode_duplicate(dev, mode);
if (!adjusted_mode) {
crtc->enabled = saved_enabled;
return false;
}
saved_mode = crtc->mode;
saved_hwmode = crtc->hwmode;
saved_x = crtc->x;
saved_y = crtc->y;
/* Update crtc values up front so the driver can rely on them for mode
* setting.
*/
crtc->mode = *mode;
crtc->x = x;
crtc->y = y;
/* Pass our mode to the connectors and the CRTC to give them a chance to
* adjust it according to limitations or connector properties, and also
* a chance to reject the mode entirely.
*/
drm_for_each_encoder(encoder, dev) {
if (encoder->crtc != crtc)
continue;
encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
continue;
ret = drm_bridge_mode_fixup(encoder->bridge,
mode, adjusted_mode);
if (!ret) {
DRM_DEBUG_KMS("Bridge fixup failed\n");
goto done;
}
encoder_funcs = encoder->helper_private;
if (encoder_funcs->mode_fixup) {
if (!(ret = encoder_funcs->mode_fixup(encoder, mode,
adjusted_mode))) {
DRM_DEBUG_KMS("Encoder fixup failed\n");
goto done;
}
}
}
if (crtc_funcs->mode_fixup) {
if (!(ret = crtc_funcs->mode_fixup(crtc, mode,
adjusted_mode))) {
DRM_DEBUG_KMS("CRTC fixup failed\n");
goto done;
}
}
DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
crtc->hwmode = *adjusted_mode;
/* Prepare the encoders and CRTCs before setting the mode. */
drm_for_each_encoder(encoder, dev) {
if (encoder->crtc != crtc)
continue;
encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
continue;
drm_bridge_disable(encoder->bridge);
/* Disable the encoders as the first thing we do. */
if (encoder_funcs->prepare)
encoder_funcs->prepare(encoder);
drm_bridge_post_disable(encoder->bridge);
}
drm_crtc_prepare_encoders(dev);
crtc_funcs->prepare(crtc);
/* Set up the DPLL and any encoders state that needs to adjust or depend
* on the DPLL.
*/
ret = !crtc_funcs->mode_set(crtc, mode, adjusted_mode, x, y, old_fb);
if (!ret)
goto done;
drm_for_each_encoder(encoder, dev) {
if (encoder->crtc != crtc)
continue;
encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
continue;
DRM_DEBUG_KMS("[ENCODER:%d:%s] set [MODE:%d:%s]\n",
encoder->base.id, encoder->name,
mode->base.id, mode->name);
if (encoder_funcs->mode_set)
encoder_funcs->mode_set(encoder, mode, adjusted_mode);
drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode);
}
/* Now enable the clocks, plane, pipe, and connectors that we set up. */
crtc_funcs->commit(crtc);
drm_for_each_encoder(encoder, dev) {
if (encoder->crtc != crtc)
continue;
encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
continue;
drm_bridge_pre_enable(encoder->bridge);
if (encoder_funcs->commit)
encoder_funcs->commit(encoder);
drm_bridge_enable(encoder->bridge);
}
/* Calculate and store various constants which
* are later needed by vblank and swap-completion
* timestamping. They are derived from true hwmode.
*/
drm_calc_timestamping_constants(crtc, &crtc->hwmode);
/* FIXME: add subpixel order */
done:
drm_mode_destroy(dev, adjusted_mode);
if (!ret) {
crtc->enabled = saved_enabled;
crtc->mode = saved_mode;
crtc->hwmode = saved_hwmode;
crtc->x = saved_x;
crtc->y = saved_y;
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 366 | 57.10% | 4 | 18.18% |
| Dave Airlie | 90 | 14.04% | 3 | 13.64% |
| Noralf Trönnes | 61 | 9.52% | 1 | 4.55% |
| Sean Paul | 33 | 5.15% | 1 | 4.55% |
| Daniel Stone | 21 | 3.28% | 1 | 4.55% |
| Carlos Palminha | 16 | 2.50% | 2 | 9.09% |
| Jesse Barnes | 15 | 2.34% | 1 | 4.55% |
| Ben Skeggs | 14 | 2.18% | 1 | 4.55% |
| Archit Taneja | 6 | 0.94% | 1 | 4.55% |
| Ville Syrjälä | 5 | 0.78% | 1 | 4.55% |
| Chris Wilson | 5 | 0.78% | 1 | 4.55% |
| Jani Nikula | 4 | 0.62% | 2 | 9.09% |
| Jérôme Glisse | 2 | 0.31% | 1 | 4.55% |
| Keith Packard | 2 | 0.31% | 1 | 4.55% |
| Matt Roper | 1 | 0.16% | 1 | 4.55% |
| Total | 641 | 100.00% | 22 | 100.00% |
EXPORT_SYMBOL(drm_crtc_helper_set_mode);
static void
drm_crtc_helper_disable(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct drm_connector *connector;
struct drm_encoder *encoder;
/* Decouple all encoders and their attached connectors from this crtc */
drm_for_each_encoder(encoder, dev) {
struct drm_connector_list_iter conn_iter;
if (encoder->crtc != crtc)
continue;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
if (connector->encoder != encoder)
continue;
connector->encoder = NULL;
/*
* drm_helper_disable_unused_functions() ought to be
* doing this, but since we've decoupled the encoder
* from the connector above, the required connection
* between them is henceforth no longer available.
*/
connector->dpms = DRM_MODE_DPMS_OFF;
/* we keep a reference while the encoder is bound */
drm_connector_unreference(connector);
}
drm_connector_list_iter_put(&conn_iter);
}
__drm_helper_disable_unused_functions(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 64 | 59.81% | 3 | 33.33% |
| Dave Airlie | 33 | 30.84% | 2 | 22.22% |
| Sean Paul | 5 | 4.67% | 1 | 11.11% |
| Mario Kleiner | 3 | 2.80% | 1 | 11.11% |
| Thierry Reding | 1 | 0.93% | 1 | 11.11% |
| Jérôme Glisse | 1 | 0.93% | 1 | 11.11% |
| Total | 107 | 100.00% | 9 | 100.00% |
/**
* drm_crtc_helper_set_config - set a new config from userspace
* @set: mode set configuration
*
* The drm_crtc_helper_set_config() helper function implements the of
* &drm_crtc_funcs.set_config callback for drivers using the legacy CRTC
* helpers.
*
* It first tries to locate the best encoder for each connector by calling the
* connector @drm_connector_helper_funcs.best_encoder helper operation.
*
* After locating the appropriate encoders, the helper function will call the
* mode_fixup encoder and CRTC helper operations to adjust the requested mode,
* or reject it completely in which case an error will be returned to the
* application. If the new configuration after mode adjustment is identical to
* the current configuration the helper function will return without performing
* any other operation.
*
* If the adjusted mode is identical to the current mode but changes to the
* frame buffer need to be applied, the drm_crtc_helper_set_config() function
* will call the CRTC &drm_crtc_helper_funcs.mode_set_base helper operation.
*
* If the adjusted mode differs from the current mode, or if the
* ->mode_set_base() helper operation is not provided, the helper function
* performs a full mode set sequence by calling the ->prepare(), ->mode_set()
* and ->commit() CRTC and encoder helper operations, in that order.
* Alternatively it can also use the dpms and disable helper operations. For
* details see &struct drm_crtc_helper_funcs and struct
* &drm_encoder_helper_funcs.
*
* This function is deprecated. New drivers must implement atomic modeset
* support, for which this function is unsuitable. Instead drivers should use
* drm_atomic_helper_set_config().
*
* Returns:
* Returns 0 on success, negative errno numbers on failure.
*/
int drm_crtc_helper_set_config(struct drm_mode_set *set)
{
struct drm_device *dev;
struct drm_crtc **save_encoder_crtcs, *new_crtc;
struct drm_encoder **save_connector_encoders, *new_encoder, *encoder;
bool mode_changed = false; /* if true do a full mode set */
bool fb_changed = false; /* if true and !mode_changed just do a flip */
struct drm_connector *connector;
struct drm_connector_list_iter conn_iter;
int count = 0, ro, fail = 0;
const struct drm_crtc_helper_funcs *crtc_funcs;
struct drm_mode_set save_set;
int ret;
int i;
DRM_DEBUG_KMS("\n");
BUG_ON(!set);
BUG_ON(!set->crtc);
BUG_ON(!set->crtc->helper_private);
/* Enforce sane interface api - has been abused by the fb helper. */
BUG_ON(!set->mode && set->fb);
BUG_ON(set->fb && set->num_connectors == 0);
crtc_funcs = set->crtc->helper_private;
if (!set->mode)
set->fb = NULL;
if (set->fb) {
DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
set->crtc->base.id, set->crtc->name,
set->fb->base.id,
(int)set->num_connectors, set->x, set->y);
} else {
DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
set->crtc->base.id, set->crtc->name);
drm_crtc_helper_disable(set->crtc);
return 0;
}
dev = set->crtc->dev;
drm_warn_on_modeset_not_all_locked(dev);
/*
* Allocate space for the backup of all (non-pointer) encoder and
* connector data.
*/
save_encoder_crtcs = kzalloc(dev->mode_config.num_encoder *
sizeof(struct drm_crtc *), GFP_KERNEL);
if (!save_encoder_crtcs)
return -ENOMEM;
save_connector_encoders = kzalloc(dev->mode_config.num_connector *
sizeof(struct drm_encoder *), GFP_KERNEL);
if (!save_connector_encoders) {
kfree(save_encoder_crtcs);
return -ENOMEM;
}
/*
* Copy data. Note that driver private data is not affected.
* Should anything bad happen only the expected state is
* restored, not the drivers personal bookkeeping.
*/
count = 0;
drm_for_each_encoder(encoder, dev) {
save_encoder_crtcs[count++] = encoder->crtc;
}
count = 0;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter)
save_connector_encoders[count++] = connector->encoder;
drm_connector_list_iter_put(&conn_iter);
save_set.crtc = set->crtc;
save_set.mode = &set->crtc->mode;
save_set.x = set->crtc->x;
save_set.y = set->crtc->y;
save_set.fb = set->crtc->primary->fb;
/* We should be able to check here if the fb has the same properties
* and then just flip_or_move it */
if (set->crtc->primary->fb != set->fb) {
/* If we have no fb then treat it as a full mode set */
if (set->crtc->primary->fb == NULL) {
DRM_DEBUG_KMS("crtc has no fb, full mode set\n");
mode_changed = true;
} else if (set->fb->format != set->crtc->primary->fb->format) {
mode_changed = true;
} else
fb_changed = true;
}
if (set->x != set->crtc->x || set->y != set->crtc->y)
fb_changed = true;
if (!drm_mode_equal(set->mode, &set->crtc->mode)) {
DRM_DEBUG_KMS("modes are different, full mode set\n");
drm_mode_debug_printmodeline(&set->crtc->mode);
drm_mode_debug_printmodeline(set->mode);
mode_changed = true;
}
/* take a reference on all unbound connectors in set, reuse the
* already taken reference for bound connectors
*/
for (ro = 0; ro < set->num_connectors; ro++) {
if (set->connectors[ro]->encoder)
continue;
drm_connector_reference(set->connectors[ro]);
}
/* a) traverse passed in connector list and get encoders for them */
count = 0;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
const struct drm_connector_helper_funcs *connector_funcs =
connector->helper_private;
new_encoder = connector->encoder;
for (ro = 0; ro < set->num_connectors; ro++) {
if (set->connectors[ro] == connector) {
new_encoder = connector_funcs->best_encoder(connector);
/* if we can't get an encoder for a connector
we are setting now - then fail */
if (new_encoder == NULL)
/* don't break so fail path works correct */
fail = 1;
if (connector->dpms != DRM_MODE_DPMS_ON) {
DRM_DEBUG_KMS("connector dpms not on, full mode switch\n");
mode_changed = true;
}
break;
}
}
if (new_encoder != connector->encoder) {
DRM_DEBUG_KMS("encoder changed, full mode switch\n");
mode_changed = true;
/* If the encoder is reused for another connector, then
* the appropriate crtc will be set later.
*/
if (connector->encoder)
connector->encoder->crtc = NULL;
connector->encoder = new_encoder;
}
}
drm_connector_list_iter_put(&conn_iter);
if (fail) {
ret = -EINVAL;
goto fail;
}
count = 0;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter) {
if (!connector->encoder)
continue;
if (connector->encoder->crtc == set->crtc)
new_crtc = NULL;
else
new_crtc = connector->encoder->crtc;
for (ro = 0; ro < set->num_connectors; ro++) {
if (set->connectors[ro] == connector)
new_crtc = set->crtc;
}
/* Make sure the new CRTC will work with the encoder */
if (new_crtc &&
!drm_encoder_crtc_ok(connector->encoder, new_crtc)) {
ret = -EINVAL;
drm_connector_list_iter_put(&conn_iter);
goto fail;
}
if (new_crtc != connector->encoder->crtc) {
DRM_DEBUG_KMS("crtc changed, full mode switch\n");
mode_changed = true;
connector->encoder->crtc = new_crtc;
}
if (new_crtc) {
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
connector->base.id, connector->name,
new_crtc->base.id, new_crtc->name);
} else {
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
connector->base.id, connector->name);
}
}
drm_connector_list_iter_put(&conn_iter);
/* mode_set_base is not a required function */
if (fb_changed && !crtc_funcs->mode_set_base)
mode_changed = true;
if (mode_changed) {
if (drm_helper_crtc_in_use(set->crtc)) {
DRM_DEBUG_KMS("attempting to set mode from"
" userspace\n");
drm_mode_debug_printmodeline(set->mode);
set->crtc->primary->fb = set->fb;
if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
set->x, set->y,
save_set.fb)) {
DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
set->crtc->base.id, set->crtc->name);
set->crtc->primary->fb = save_set.fb;
ret = -EINVAL;
goto fail;
}
DRM_DEBUG_KMS("Setting connector DPMS state to on\n");
for (i = 0; i < set->num_connectors; i++) {
DRM_DEBUG_KMS("\t[CONNECTOR:%d:%s] set DPMS on\n", set->connectors[i]->base.id,
set->connectors[i]->name);
set->connectors[i]->funcs->dpms(set->connectors[i], DRM_MODE_DPMS_ON);
}
}
__drm_helper_disable_unused_functions(dev);
} else if (fb_changed) {
set->crtc->x = set->x;
set->crtc->y = set->y;
set->crtc->primary->fb = set->fb;
ret = crtc_funcs->mode_set_base(set->crtc,
set->x, set->y, save_set.fb);
if (ret != 0) {
set->crtc->x = save_set.x;
set->crtc->y = save_set.y;
set->crtc->primary->fb = save_set.fb;
goto fail;
}
}
kfree(save_connector_encoders);
kfree(save_encoder_crtcs);
return 0;
fail:
/* Restore all previous data. */
count = 0;
drm_for_each_encoder(encoder, dev) {
encoder->crtc = save_encoder_crtcs[count++];
}
count = 0;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter)
connector->encoder = save_connector_encoders[count++];
drm_connector_list_iter_put(&conn_iter);
/* after fail drop reference on all unbound connectors in set, let
* bound connectors keep their reference
*/
for (ro = 0; ro < set->num_connectors; ro++) {
if (set->connectors[ro]->encoder)
continue;
drm_connector_unreference(set->connectors[ro]);
}
/* Try to restore the config */
if (mode_changed &&
!drm_crtc_helper_set_mode(save_set.crtc, save_set.mode, save_set.x,
save_set.y, save_set.fb))
DRM_ERROR("failed to restore config after modeset failure\n");
kfree(save_connector_encoders);
kfree(save_encoder_crtcs);
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Dave Airlie | 542 | 37.61% | 2 | 4.76% |
| Daniel Vetter | 367 | 25.47% | 7 | 16.67% |
| Jesse Barnes | 127 | 8.81% | 5 | 11.90% |
| Maarten Maathuis | 83 | 5.76% | 3 | 7.14% |
| Jérôme Glisse | 69 | 4.79% | 1 | 2.38% |
| Chris Wilson | 66 | 4.58% | 6 | 14.29% |
| Philipp Zabel | 57 | 3.96% | 2 | 4.76% |
| Ville Syrjälä | 35 | 2.43% | 3 | 7.14% |
| Keith Packard | 32 | 2.22% | 2 | 4.76% |
| Laurent Pinchart | 14 | 0.97% | 1 | 2.38% |
| Matt Roper | 12 | 0.83% | 1 | 2.38% |
| Ilija Hadzic | 10 | 0.69% | 3 | 7.14% |
| Yakui Zhao | 10 | 0.69% | 1 | 2.38% |
| Jani Nikula | 8 | 0.56% | 2 | 4.76% |
| Jakob Bornecrantz | 5 | 0.35% | 1 | 2.38% |
| Thierry Reding | 3 | 0.21% | 1 | 2.38% |
| Kristian Högsberg | 1 | 0.07% | 1 | 2.38% |
| Total | 1441 | 100.00% | 42 | 100.00% |
EXPORT_SYMBOL(drm_crtc_helper_set_config);
static int drm_helper_choose_encoder_dpms(struct drm_encoder *encoder)
{
int dpms = DRM_MODE_DPMS_OFF;
struct drm_connector *connector;
struct drm_connector_list_iter conn_iter;
struct drm_device *dev = encoder->dev;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter)
if (connector->encoder == encoder)
if (connector->dpms < dpms)
dpms = connector->dpms;
drm_connector_list_iter_put(&conn_iter);
return dpms;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 56 | 70.89% | 2 | 40.00% |
| Dave Airlie | 18 | 22.78% | 2 | 40.00% |
| David John | 5 | 6.33% | 1 | 20.00% |
| Total | 79 | 100.00% | 5 | 100.00% |
/* Helper which handles bridge ordering around encoder dpms */
static void drm_helper_encoder_dpms(struct drm_encoder *encoder, int mode)
{
struct drm_bridge *bridge = encoder->bridge;
const struct drm_encoder_helper_funcs *encoder_funcs;
encoder_funcs = encoder->helper_private;
if (!encoder_funcs)
return;
if (mode == DRM_MODE_DPMS_ON)
drm_bridge_pre_enable(bridge);
else
drm_bridge_disable(bridge);
if (encoder_funcs->dpms)
encoder_funcs->dpms(encoder, mode);
if (mode == DRM_MODE_DPMS_ON)
drm_bridge_enable(bridge);
else
drm_bridge_post_disable(bridge);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 53 | 58.89% | 2 | 25.00% |
| David John | 16 | 17.78% | 1 | 12.50% |
| Noralf Trönnes | 12 | 13.33% | 1 | 12.50% |
| Archit Taneja | 4 | 4.44% | 1 | 12.50% |
| Dave Airlie | 2 | 2.22% | 1 | 12.50% |
| Sean Paul | 2 | 2.22% | 1 | 12.50% |
| Jani Nikula | 1 | 1.11% | 1 | 12.50% |
| Total | 90 | 100.00% | 8 | 100.00% |
static int drm_helper_choose_crtc_dpms(struct drm_crtc *crtc)
{
int dpms = DRM_MODE_DPMS_OFF;
struct drm_connector *connector;
struct drm_connector_list_iter conn_iter;
struct drm_device *dev = crtc->dev;
drm_connector_list_iter_get(dev, &conn_iter);
drm_for_each_connector_iter(connector, &conn_iter)
if (connector->encoder && connector->encoder->crtc == crtc)
if (connector->dpms < dpms)
dpms = connector->dpms;
drm_connector_list_iter_put(&conn_iter);
return dpms;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 59 | 69.41% | 4 | 80.00% |
| Dave Airlie | 26 | 30.59% | 1 | 20.00% |
| Total | 85 | 100.00% | 5 | 100.00% |
/**
* drm_helper_connector_dpms() - connector dpms helper implementation
* @connector: affected connector
* @mode: DPMS mode
*
* The drm_helper_connector_dpms() helper function implements the
* &drm_connector_funcs.dpms callback for drivers using the legacy CRTC
* helpers.
*
* This is the main helper function provided by the CRTC helper framework for
* implementing the DPMS connector attribute. It computes the new desired DPMS
* state for all encoders and CRTCs in the output mesh and calls the
* &drm_crtc_helper_funcs.dpms and &drm_encoder_helper_funcs.dpms callbacks
* provided by the driver.
*
* This function is deprecated. New drivers must implement atomic modeset
* support, for which this function is unsuitable. Instead drivers should use
* drm_atomic_helper_connector_dpms().
*
* Returns:
* Always returns 0.
*/
int drm_helper_connector_dpms(struct drm_connector *connector, int mode)
{
struct drm_encoder *encoder = connector->encoder;
struct drm_crtc *crtc = encoder ? encoder->crtc : NULL;
int old_dpms, encoder_dpms = DRM_MODE_DPMS_OFF;
if (mode == connector->dpms)
return 0;
old_dpms = connector->dpms;
connector->dpms = mode;
if (encoder)
encoder_dpms = drm_helper_choose_encoder_dpms(encoder);
/* from off to on, do crtc then encoder */
if (mode < old_dpms) {
if (crtc) {
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
if (crtc_funcs->dpms)
(*crtc_funcs->dpms) (crtc,
drm_helper_choose_crtc_dpms(crtc));
}
if (encoder)
drm_helper_encoder_dpms(encoder, encoder_dpms);
}
/* from on to off, do encoder then crtc */
if (mode > old_dpms) {
if (encoder)
drm_helper_encoder_dpms(encoder, encoder_dpms);
if (crtc) {
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
if (crtc_funcs->dpms)
(*crtc_funcs->dpms) (crtc,
drm_helper_choose_crtc_dpms(crtc));
}
}
return 0;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 134 | 69.43% | 1 | 11.11% |
| Dave Airlie | 37 | 19.17% | 2 | 22.22% |
| Damien Lespiau | 8 | 4.15% | 2 | 22.22% |
| Maarten Lankhorst | 7 | 3.63% | 1 | 11.11% |
| Chris Wilson | 4 | 2.07% | 1 | 11.11% |
| Jani Nikula | 2 | 1.04% | 1 | 11.11% |
| Keith Packard | 1 | 0.52% | 1 | 11.11% |
| Total | 193 | 100.00% | 9 | 100.00% |
EXPORT_SYMBOL(drm_helper_connector_dpms);
/**
* drm_helper_resume_force_mode - force-restore mode setting configuration
* @dev: drm_device which should be restored
*
* Drivers which use the mode setting helpers can use this function to
* force-restore the mode setting configuration e.g. on resume or when something
* else might have trampled over the hw state (like some overzealous old BIOSen
* tended to do).
*
* This helper doesn't provide a error return value since restoring the old
* config should never fail due to resource allocation issues since the driver
* has successfully set the restored configuration already. Hence this should
* boil down to the equivalent of a few dpms on calls, which also don't provide
* an error code.
*
* Drivers where simply restoring an old configuration again might fail (e.g.
* due to slight differences in allocating shared resources when the
* configuration is restored in a different order than when userspace set it up)
* need to use their own restore logic.
*
* This function is deprecated. New drivers should implement atomic mode-
* setting and use the atomic suspend/resume helpers.
*
* See also:
* drm_atomic_helper_suspend(), drm_atomic_helper_resume()
*/
void drm_helper_resume_force_mode(struct drm_device *dev)
{
struct drm_crtc *crtc;
struct drm_encoder *encoder;
const struct drm_crtc_helper_funcs *crtc_funcs;
int encoder_dpms;
bool ret;
drm_modeset_lock_all(dev);
drm_for_each_crtc(crtc, dev) {
if (!crtc->enabled)
continue;
ret = drm_crtc_helper_set_mode(crtc, &crtc->mode,
crtc->x, crtc->y, crtc->primary->fb);
/* Restoring the old config should never fail! */
if (ret == false)
DRM_ERROR("failed to set mode on crtc %p\n", crtc);
/* Turn off outputs that were already powered off */
if (drm_helper_choose_crtc_dpms(crtc)) {
drm_for_each_encoder(encoder, dev) {
if(encoder->crtc != crtc)
continue;
encoder_dpms = drm_helper_choose_encoder_dpms(
encoder);
drm_helper_encoder_dpms(encoder, encoder_dpms);
}
crtc_funcs = crtc->helper_private;
if (crtc_funcs->dpms)
(*crtc_funcs->dpms) (crtc,
drm_helper_choose_crtc_dpms(crtc));
}
}
/* disable the unused connectors while restoring the modesetting */
__drm_helper_disable_unused_functions(dev);
drm_modeset_unlock_all(dev);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 158 | 91.86% | 3 | 42.86% |
| Dave Airlie | 9 | 5.23% | 2 | 28.57% |
| Damien Lespiau | 4 | 2.33% | 1 | 14.29% |
| Jani Nikula | 1 | 0.58% | 1 | 14.29% |
| Total | 172 | 100.00% | 7 | 100.00% |
EXPORT_SYMBOL(drm_helper_resume_force_mode);
/**
* drm_helper_crtc_mode_set - mode_set implementation for atomic plane helpers
* @crtc: DRM CRTC
* @mode: DRM display mode which userspace requested
* @adjusted_mode: DRM display mode adjusted by ->mode_fixup callbacks
* @x: x offset of the CRTC scanout area on the underlying framebuffer
* @y: y offset of the CRTC scanout area on the underlying framebuffer
* @old_fb: previous framebuffer
*
* This function implements a callback useable as the ->mode_set callback
* required by the CRTC helpers. Besides the atomic plane helper functions for
* the primary plane the driver must also provide the ->mode_set_nofb callback
* to set up the CRTC.
*
* This is a transitional helper useful for converting drivers to the atomic
* interfaces.
*/
int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode, int x, int y,
struct drm_framebuffer *old_fb)
{
struct drm_crtc_state *crtc_state;
const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
int ret;
if (crtc->funcs->atomic_duplicate_state)
crtc_state = crtc->funcs->atomic_duplicate_state(crtc);
else {
if (!crtc->state)
drm_atomic_helper_crtc_reset(crtc);
crtc_state = drm_atomic_helper_crtc_duplicate_state(crtc);
}
if (!crtc_state)
return -ENOMEM;
crtc_state->planes_changed = true;
crtc_state->mode_changed = true;
ret = drm_atomic_set_mode_for_crtc(crtc_state, mode);
if (ret)
goto out;
drm_mode_copy(&crtc_state->adjusted_mode, adjusted_mode);
if (crtc_funcs->atomic_check) {
ret = crtc_funcs->atomic_check(crtc, crtc_state);
if (ret)
goto out;
}
swap(crtc->state, crtc_state);
crtc_funcs->mode_set_nofb(crtc);
ret = drm_helper_crtc_mode_set_base(crtc, x, y, old_fb);
out:
if (crtc_state) {
if (crtc->funcs->atomic_destroy_state)
crtc->funcs->atomic_destroy_state(crtc, crtc_state);
else
drm_atomic_helper_crtc_destroy_state(crtc, crtc_state);
}
return ret;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 194 | 84.35% | 5 | 62.50% |
| Daniel Stone | 35 | 15.22% | 2 | 25.00% |
| Jani Nikula | 1 | 0.43% | 1 | 12.50% |
| Total | 230 | 100.00% | 8 | 100.00% |
EXPORT_SYMBOL(drm_helper_crtc_mode_set);
/**
* drm_helper_crtc_mode_set_base - mode_set_base implementation for atomic plane helpers
* @crtc: DRM CRTC
* @x: x offset of the CRTC scanout area on the underlying framebuffer
* @y: y offset of the CRTC scanout area on the underlying framebuffer
* @old_fb: previous framebuffer
*
* This function implements a callback useable as the ->mode_set_base used
* required by the CRTC helpers. The driver must provide the atomic plane helper
* functions for the primary plane.
*
* This is a transitional helper useful for converting drivers to the atomic
* interfaces.
*/
int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb)
{
struct drm_plane_state *plane_state;
struct drm_plane *plane = crtc->primary;
if (plane->funcs->atomic_duplicate_state)
plane_state = plane->funcs->atomic_duplicate_state(plane);
else {
if (!plane->state)
drm_atomic_helper_plane_reset(plane);
plane_state = drm_atomic_helper_plane_duplicate_state(plane);
}
if (!plane_state)
return -ENOMEM;
plane_state->plane = plane;
plane_state->crtc = crtc;
drm_atomic_set_fb_for_plane(plane_state, crtc->primary->fb);
plane_state->crtc_x = 0;
plane_state->crtc_y = 0;
plane_state->crtc_h = crtc->mode.vdisplay;
plane_state->crtc_w = crtc->mode.hdisplay;
plane_state->src_x = x << 16;
plane_state->src_y = y << 16;
plane_state->src_h = crtc->mode.vdisplay << 16;
plane_state->src_w = crtc->mode.hdisplay << 16;
return drm_plane_helper_commit(plane, plane_state, old_fb);
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 183 | 96.32% | 3 | 75.00% |
| Liu Ying | 7 | 3.68% | 1 | 25.00% |
| Total | 190 | 100.00% | 4 | 100.00% |
EXPORT_SYMBOL(drm_helper_crtc_mode_set_base);
Overall Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| Daniel Vetter | 2017 | 52.69% | 23 | 23.23% |
| Dave Airlie | 848 | 22.15% | 9 | 9.09% |
| Jesse Barnes | 147 | 3.84% | 5 | 5.05% |
| Noralf Trönnes | 92 | 2.40% | 1 | 1.01% |
| Maarten Maathuis | 83 | 2.17% | 3 | 3.03% |
| Chris Wilson | 76 | 1.99% | 9 | 9.09% |
| Jérôme Glisse | 72 | 1.88% | 1 | 1.01% |
| Keith Packard | 59 | 1.54% | 3 | 3.03% |
| Philipp Zabel | 57 | 1.49% | 2 | 2.02% |
| Daniel Stone | 56 | 1.46% | 3 | 3.03% |
| Sean Paul | 40 | 1.04% | 1 | 1.01% |
| Ville Syrjälä | 40 | 1.04% | 3 | 3.03% |
| Yakui Zhao | 38 | 0.99% | 4 | 4.04% |
| Damien Lespiau | 21 | 0.55% | 4 | 4.04% |
| David John | 21 | 0.55% | 1 | 1.01% |
| Jani Nikula | 20 | 0.52% | 3 | 3.03% |
| Laurent Pinchart | 17 | 0.44% | 2 | 2.02% |
| Carlos Palminha | 16 | 0.42% | 2 | 2.02% |
| Sergei Antonov | 15 | 0.39% | 1 | 1.01% |
| Ben Skeggs | 14 | 0.37% | 1 | 1.01% |
| Matt Roper | 13 | 0.34% | 1 | 1.01% |
| Archit Taneja | 12 | 0.31% | 1 | 1.01% |
| Ilija Hadzic | 10 | 0.26% | 3 | 3.03% |
| Maarten Lankhorst | 7 | 0.18% | 1 | 1.01% |
| Liu Ying | 7 | 0.18% | 1 | 1.01% |
| David Howells | 6 | 0.16% | 1 | 1.01% |
| Paul Gortmaker | 6 | 0.16% | 2 | 2.02% |
| Jakob Bornecrantz | 5 | 0.13% | 1 | 1.01% |
| Thierry Reding | 5 | 0.13% | 2 | 2.02% |
| Mario Kleiner | 3 | 0.08% | 1 | 1.01% |
| Carsten Emde | 2 | 0.05% | 1 | 1.01% |
| Rob Clark | 2 | 0.05% | 2 | 2.02% |
| Kristian Högsberg | 1 | 0.03% | 1 | 1.01% |
| Total | 3828 | 100.00% | 99 | 100.00% |
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