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drm: Add DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags v2

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These flags allow userspace to explicitly specify the target vertical
blank period when a flip should take effect.

v2:
* Add new struct drm_mode_crtc_page_flip_target instead of modifying
  struct drm_mode_crtc_page_flip, to make sure all existing userspace
  code keeps compiling (Daniel Vetter)

Acked-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Michel Dänzer
2016-08-08 16:23:39 +09:00
committed by Alex Deucher
parent 5dd20bbae8
commit f837297ad8
4 changed files with 86 additions and 10 deletions
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8
drivers/gpu/drm/drm_ioctl.c
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@@ -228,6 +228,7 @@ static int drm_getstats(struct drm_device *dev, void *data,
static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv)
{
struct drm_get_cap *req = data;
struct drm_crtc *crtc;
req->value = 0;
switch (req->capability) {
@@ -254,6 +255,13 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_
case DRM_CAP_ASYNC_PAGE_FLIP:
req->value = dev->mode_config.async_page_flip;
break;
case DRM_CAP_PAGE_FLIP_TARGET:
req->value = 1;
drm_for_each_crtc(crtc, dev) {
if (!crtc->funcs->page_flip_target)
req->value = 0;
}
break;
case DRM_CAP_CURSOR_WIDTH:
if (dev->mode_config.cursor_width)
req->value = dev->mode_config.cursor_width;