Release 4.7 drivers/gpu/drm/omapdrm/omap_fbdev.c
/*
* drivers/gpu/drm/omapdrm/omap_fbdev.c
*
* Copyright (C) 2011 Texas Instruments
* Author: Rob Clark <rob@ti.com>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 as published by
* the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
* more details.
*
* You should have received a copy of the GNU General Public License along with
* this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <drm/drm_crtc.h>
#include <drm/drm_fb_helper.h>
#include "omap_drv.h"
MODULE_PARM_DESC(ywrap, "Enable ywrap scrolling (omap44xx and later, default 'y')");
static bool ywrap_enabled = true;
module_param_named(ywrap, ywrap_enabled, bool, 0644);
/*
* fbdev funcs, to implement legacy fbdev interface on top of drm driver
*/
#define to_omap_fbdev(x) container_of(x, struct omap_fbdev, base)
struct omap_fbdev {
struct drm_fb_helper base;
struct drm_framebuffer *fb;
struct drm_gem_object *bo;
bool ywrap_enabled;
/* for deferred dmm roll when getting called in atomic ctx */
struct work_struct work;
};
static struct drm_fb_helper *get_fb(struct fb_info *fbi);
static void pan_worker(struct work_struct *work)
{
struct omap_fbdev *fbdev = container_of(work, struct omap_fbdev, work);
struct fb_info *fbi = fbdev->base.fbdev;
int npages;
/* DMM roll shifts in 4K pages: */
npages = fbi->fix.line_length >> PAGE_SHIFT;
omap_gem_roll(fbdev->bo, fbi->var.yoffset * npages);
}
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| Total | 66 | 100.00% | 1 | 100.00% |
static int omap_fbdev_pan_display(struct fb_var_screeninfo *var,
struct fb_info *fbi)
{
struct drm_fb_helper *helper = get_fb(fbi);
struct omap_fbdev *fbdev = to_omap_fbdev(helper);
if (!helper)
goto fallback;
if (!fbdev->ywrap_enabled)
goto fallback;
if (drm_can_sleep()) {
pan_worker(&fbdev->work);
} else {
struct omap_drm_private *priv = helper->dev->dev_private;
queue_work(priv->wq, &fbdev->work);
}
return 0;
fallback:
return drm_fb_helper_pan_display(var, fbi);
}
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| rob clark | rob clark | 108 | 100.00% | 3 | 100.00% |
| Total | 108 | 100.00% | 3 | 100.00% |
static struct fb_ops omap_fb_ops = {
.owner = THIS_MODULE,
/* Note: to properly handle manual update displays, we wrap the
* basic fbdev ops which write to the framebuffer
*/
.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,
.fb_check_var = drm_fb_helper_check_var,
.fb_set_par = drm_fb_helper_set_par,
.fb_pan_display = omap_fbdev_pan_display,
.fb_blank = drm_fb_helper_blank,
.fb_setcmap = drm_fb_helper_setcmap,
};
static int omap_fbdev_create(struct drm_fb_helper *helper,
struct drm_fb_helper_surface_size *sizes)
{
struct omap_fbdev *fbdev = to_omap_fbdev(helper);
struct drm_device *dev = helper->dev;
struct omap_drm_private *priv = dev->dev_private;
struct drm_framebuffer *fb = NULL;
union omap_gem_size gsize;
struct fb_info *fbi = NULL;
struct drm_mode_fb_cmd2 mode_cmd = {0};
dma_addr_t paddr;
int ret;
sizes->surface_bpp = 32;
sizes->surface_depth = 24;
DBG("create fbdev: %dx%d@%d (%dx%d)", sizes->surface_width,
sizes->surface_height, sizes->surface_bpp,
sizes->fb_width, sizes->fb_height);
mode_cmd.pixel_format = drm_mode_legacy_fb_format(sizes->surface_bpp,
sizes->surface_depth);
mode_cmd.width = sizes->surface_width;
mode_cmd.height = sizes->surface_height;
mode_cmd.pitches[0] = align_pitch(
mode_cmd.width * ((sizes->surface_bpp + 7) / 8),
mode_cmd.width, sizes->surface_bpp);
fbdev->ywrap_enabled = priv->has_dmm && ywrap_enabled;
if (fbdev->ywrap_enabled) {
/* need to align pitch to page size if using DMM scrolling */
mode_cmd.pitches[0] = PAGE_ALIGN(mode_cmd.pitches[0]);
}
/* allocate backing bo */
gsize = (union omap_gem_size){
.bytes = PAGE_ALIGN(mode_cmd.pitches[0] * mode_cmd.height),
};
DBG("allocating %d bytes for fb %d", gsize.bytes, dev->primary->index);
fbdev->bo = omap_gem_new(dev, gsize, OMAP_BO_SCANOUT | OMAP_BO_WC);
if (!fbdev->bo) {
dev_err(dev->dev, "failed to allocate buffer object\n");
ret = -ENOMEM;
goto fail;
}
fb = omap_framebuffer_init(dev, &mode_cmd, &fbdev->bo);
if (IS_ERR(fb)) {
dev_err(dev->dev, "failed to allocate fb\n");
/* note: if fb creation failed, we can't rely on fb destroy
* to unref the bo:
*/
drm_gem_object_unreference_unlocked(fbdev->bo);
ret = PTR_ERR(fb);
goto fail;
}
/* note: this keeps the bo pinned.. which is perhaps not ideal,
* but is needed as long as we use fb_mmap() to mmap to userspace
* (since this happens using fix.smem_start). Possibly we could
* implement our own mmap using GEM mmap support to avoid this
* (non-tiled buffer doesn't need to be pinned for fbcon to write
* to it). Then we just need to be sure that we are able to re-
* pin it in case of an opps.
*/
ret = omap_gem_get_paddr(fbdev->bo, &paddr, true);
if (ret) {
dev_err(dev->dev,
"could not map (paddr)! Skipping framebuffer alloc\n");
ret = -ENOMEM;
goto fail;
}
mutex_lock(&dev->struct_mutex);
fbi = drm_fb_helper_alloc_fbi(helper);
if (IS_ERR(fbi)) {
dev_err(dev->dev, "failed to allocate fb info\n");
ret = PTR_ERR(fbi);
goto fail_unlock;
}
DBG("fbi=%p, dev=%p", fbi, dev);
fbdev->fb = fb;
helper->fb = fb;
fbi->par = helper;
fbi->flags = FBINFO_DEFAULT;
fbi->fbops = &omap_fb_ops;
strcpy(fbi->fix.id, MODULE_NAME);
drm_fb_helper_fill_fix(fbi, fb->pitches[0], fb->depth);
drm_fb_helper_fill_var(fbi, helper, sizes->fb_width, sizes->fb_height);
dev->mode_config.fb_base = paddr;
fbi->screen_base = omap_gem_vaddr(fbdev->bo);
fbi->screen_size = fbdev->bo->size;
fbi->fix.smem_start = paddr;
fbi->fix.smem_len = fbdev->bo->size;
/* if we have DMM, then we can use it for scrolling by just
* shuffling pages around in DMM rather than doing sw blit.
*/
if (fbdev->ywrap_enabled) {
DRM_INFO("Enabling DMM ywrap scrolling\n");
fbi->flags |= FBINFO_HWACCEL_YWRAP | FBINFO_READS_FAST;
fbi->fix.ywrapstep = 1;
}
DBG("par=%p, %dx%d", fbi->par, fbi->var.xres, fbi->var.yres);
DBG("allocated %dx%d fb", fbdev->fb->width, fbdev->fb->height);
mutex_unlock(&dev->struct_mutex);
return 0;
fail_unlock:
mutex_unlock(&dev->struct_mutex);
fail:
if (ret) {
drm_fb_helper_release_fbi(helper);
if (fb) {
drm_framebuffer_unregister_private(fb);
drm_framebuffer_remove(fb);
}
}
return ret;
}
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| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 658 | 96.76% | 5 | 45.45% |
| archit taneja | archit taneja | 11 | 1.62% | 1 | 9.09% |
| daniel vetter | daniel vetter | 8 | 1.18% | 2 | 18.18% |
| andy gross | andy gross | 1 | 0.15% | 1 | 9.09% |
| tomi valkeinen | tomi valkeinen | 1 | 0.15% | 1 | 9.09% |
| fabian frederick | fabian frederick | 1 | 0.15% | 1 | 9.09% |
| Total | 680 | 100.00% | 11 | 100.00% |
static const struct drm_fb_helper_funcs omap_fb_helper_funcs = {
.fb_probe = omap_fbdev_create,
};
static struct drm_fb_helper *get_fb(struct fb_info *fbi)
{
if (!fbi || strcmp(fbi->fix.id, MODULE_NAME)) {
/* these are not the fb's you're looking for */
return NULL;
}
return fbi->par;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 40 | 100.00% | 1 | 100.00% |
| Total | 40 | 100.00% | 1 | 100.00% |
/* initialize fbdev helper */
struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
struct omap_fbdev *fbdev = NULL;
struct drm_fb_helper *helper;
int ret = 0;
fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
if (!fbdev)
goto fail;
INIT_WORK(&fbdev->work, pan_worker);
helper = &fbdev->base;
drm_fb_helper_prepare(dev, helper, &omap_fb_helper_funcs);
ret = drm_fb_helper_init(dev, helper,
priv->num_crtcs, priv->num_connectors);
if (ret) {
dev_err(dev->dev, "could not init fbdev: ret=%d\n", ret);
goto fail;
}
ret = drm_fb_helper_single_add_all_connectors(helper);
if (ret)
goto fini;
/* disable all the possible outputs/crtcs before entering KMS mode */
drm_helper_disable_unused_functions(dev);
ret = drm_fb_helper_initial_config(helper, 32);
if (ret)
goto fini;
priv->fbdev = helper;
return helper;
fini:
drm_fb_helper_fini(helper);
fail:
kfree(fbdev);
dev_warn(dev->dev, "omap_fbdev_init failed\n");
/* well, limp along without an fbdev.. maybe X11 will work? */
return NULL;
}
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| rob clark | rob clark | 148 | 75.90% | 2 | 33.33% |
| thierry reding | thierry reding | 31 | 15.90% | 2 | 33.33% |
| laurent pinchart | laurent pinchart | 10 | 5.13% | 1 | 16.67% |
| daniel vetter | daniel vetter | 6 | 3.08% | 1 | 16.67% |
| Total | 195 | 100.00% | 6 | 100.00% |
void omap_fbdev_free(struct drm_device *dev)
{
struct omap_drm_private *priv = dev->dev_private;
struct drm_fb_helper *helper = priv->fbdev;
struct omap_fbdev *fbdev;
DBG();
drm_fb_helper_unregister_fbi(helper);
drm_fb_helper_release_fbi(helper);
drm_fb_helper_fini(helper);
fbdev = to_omap_fbdev(priv->fbdev);
/* release the ref taken in omap_fbdev_create() */
omap_gem_put_paddr(fbdev->bo);
/* this will free the backing object */
if (fbdev->fb) {
drm_framebuffer_unregister_private(fbdev->fb);
drm_framebuffer_remove(fbdev->fb);
}
kfree(fbdev);
priv->fbdev = NULL;
}
Contributors
| Person | Tokens | Prop | Commits | CommitProp |
| rob clark | rob clark | 76 | 74.51% | 3 | 42.86% |
| daniel vetter | daniel vetter | 9 | 8.82% | 1 | 14.29% |
| tomi valkeinen | tomi valkeinen | 8 | 7.84% | 1 | 14.29% |
| julia lawall | julia lawall | 5 | 4.90% | 1 | 14.29% |
| archit taneja | archit taneja | 4 | 3.92% | 1 | 14.29% |
| Total | 102 | 100.00% | 7 | 100.00% |
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| rob clark | rob clark | 1244 | 92.22% | 7 | 31.82% |
| thierry reding | thierry reding | 32 | 2.37% | 3 | 13.64% |
| daniel vetter | daniel vetter | 24 | 1.78% | 4 | 18.18% |
| archit taneja | archit taneja | 20 | 1.48% | 1 | 4.55% |
| laurent pinchart | laurent pinchart | 13 | 0.96% | 2 | 9.09% |
| tomi valkeinen | tomi valkeinen | 9 | 0.67% | 2 | 9.09% |
| julia lawall | julia lawall | 5 | 0.37% | 1 | 4.55% |
| fabian frederick | fabian frederick | 1 | 0.07% | 1 | 4.55% |
| andy gross | andy gross | 1 | 0.07% | 1 | 4.55% |
| Total | 1349 | 100.00% | 22 | 100.00% |
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