Let applications know whether the kernel supports asynchronous page flipping.
Signed-off-by: Keith Packard keithp@keithp.com --- drivers/gpu/drm/drm_crtc.c | 3 +++ drivers/gpu/drm/drm_ioctl.c | 3 +++ include/drm/drm_crtc.h | 3 +++ include/uapi/drm/drm.h | 1 + 4 files changed, 10 insertions(+)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 989072c..0909af6 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -3514,6 +3514,9 @@ int drm_mode_page_flip_ioctl(struct drm_device *dev, page_flip->reserved != 0) return -EINVAL;
+ if ((page_flip->flags & DRM_MODE_PAGE_FLIP_ASYNC) && !dev->mode_config.async_page_flip) + return -EINVAL; + obj = drm_mode_object_find(dev, page_flip->crtc_id, DRM_MODE_OBJECT_CRTC); if (!obj) return -EINVAL; diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index ffd7a7b..7602177 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -303,6 +303,9 @@ int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_priv) case DRM_CAP_TIMESTAMP_MONOTONIC: req->value = drm_timestamp_monotonic; break; + case DRM_CAP_ASYNC_PAGE_FLIP: + req->value = dev->mode_config.async_page_flip; + break; default: return -EINVAL; } diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 0820ab6..13d215f 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -845,6 +845,9 @@ struct drm_mode_config {
/* dumb ioctl parameters */ uint32_t preferred_depth, prefer_shadow; + + /* whether async page flip is supported or not */ + bool async_page_flip; };
#define obj_to_crtc(x) container_of(x, struct drm_crtc, base) diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 238a166..2adfaa5 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -780,6 +780,7 @@ struct drm_event_vblank { #define DRM_CAP_DUMB_PREFER_SHADOW 0x4 #define DRM_CAP_PRIME 0x5 #define DRM_CAP_TIMESTAMP_MONOTONIC 0x6 +#define DRM_CAP_ASYNC_PAGE_FLIP 0x7
#define DRM_PRIME_CAP_IMPORT 0x1 #define DRM_PRIME_CAP_EXPORT 0x2