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authorLaurent Pinchart <laurent.pinchart@ideasonboard.com>2013-04-22 01:38:46 +0200
committerDave Airlie <airlied@redhat.com>2013-04-22 11:48:21 +0200
commit909d9cda2edfc61b8ec82e248eee3545b592e20d (patch)
tree253a10c2ee12c32820bddb29290757170aeee431 /drivers/gpu/drm/drm_crtc.c
parentMerge branch 'exynos-drm-next' of git://git.kernel.org/pub/scm/linux/kernel/g... (diff)
downloadlinux-909d9cda2edfc61b8ec82e248eee3545b592e20d.tar.xz
linux-909d9cda2edfc61b8ec82e248eee3545b592e20d.zip
drm: Don't allow page flip to change pixel format
A page flip is not a mode set, changing the frame buffer pixel format doesn't make sense and isn't handled by most drivers anyway. Disallow it. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
-rw-r--r--drivers/gpu/drm/drm_crtc.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 957fb70e8d0e..c577baec416f 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3638,6 +3638,12 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev,
goto out;
}
+ if (crtc->fb->pixel_format != fb->pixel_format) {
+ DRM_DEBUG_KMS("Page flip is not allowed to change frame buffer format.\n");
+ ret = -EINVAL;
+ goto out;
+ }
+
if (page_flip->flags & DRM_MODE_PAGE_FLIP_EVENT) {
ret = -ENOMEM;
spin_lock_irqsave(&dev->event_lock, flags);