diff options
| author | Michel Dänzer <michel.daenzer@amd.com> | 2016-08-08 16:23:39 +0900 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-08-10 14:28:09 -0400 |
| commit | f837297ad82480024d3ad08cd84f6670bcafa862 (patch) | |
| tree | 42aca44491b3f0ea57170b0290eb382a51fc8c7c /drivers/gpu/drm/drm_crtc.c | |
| parent | 5dd20bbae8a39100e1cf4a7fcc8ecd598c09d992 (diff) | |
drm: Add DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags v2
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>
Diffstat (limited to 'drivers/gpu/drm/drm_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 48 |
1 files changed, 41 insertions, 7 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index a316f7336aeb..93b9821f7f24 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -5398,15 +5398,23 @@ out: int drm_mode_page_flip_ioctl(struct drm_device *dev, void *data, struct drm_file *file_priv) { - struct drm_mode_crtc_page_flip *page_flip = data; + struct drm_mode_crtc_page_flip_target *page_flip = data; struct drm_crtc *crtc; struct drm_framebuffer *fb = NULL; struct drm_pending_vblank_event *e = NULL; - u32 target_vblank = 0; + u32 target_vblank = page_flip->sequence; int ret = -EINVAL; - if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS || - page_flip->reserved != 0) + if (page_flip->flags & ~DRM_MODE_PAGE_FLIP_FLAGS) + return -EINVAL; + + if (page_flip->sequence != 0 && !(page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) + return -EINVAL; + + /* Only one of the DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE/RELATIVE flags + * can be specified + */ + if ((page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) == DRM_MODE_PAGE_FLIP_TARGET) return -EINVAL; if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) @@ -5417,15 +5425,41 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev, return -ENOENT; if (crtc->funcs->page_flip_target) { + u32 current_vblank; int r; r = drm_crtc_vblank_get(crtc); if (r) return r; - target_vblank = drm_crtc_vblank_count(crtc) + - !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC); - } else if (crtc->funcs->page_flip == NULL) { + current_vblank = drm_crtc_vblank_count(crtc); + + switch (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET) { + case DRM_MODE_PAGE_FLIP_TARGET_ABSOLUTE: + if ((int)(target_vblank - current_vblank) > 1) { + DRM_DEBUG("Invalid absolute flip target %u, " + "must be <= %u\n", target_vblank, + current_vblank + 1); + drm_crtc_vblank_put(crtc); + return -EINVAL; + } + break; + case DRM_MODE_PAGE_FLIP_TARGET_RELATIVE: + if (target_vblank != 0 && target_vblank != 1) { + DRM_DEBUG("Invalid relative flip target %u, " + "must be 0 or 1\n", target_vblank); + drm_crtc_vblank_put(crtc); + return -EINVAL; + } + target_vblank += current_vblank; + break; + default: + target_vblank = current_vblank + + !(page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC); + break; + } + } else if (crtc->funcs->page_flip == NULL || + (page_flip->flags & DRM_MODE_PAGE_FLIP_TARGET)) { return -EINVAL; } |