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drm: Advertise async page flip ability through GETCAP ioctl

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Let applications know whether the kernel supports asynchronous page
flipping.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Dave Airlie <airlied@gmail.com>
This commit is contained in:
Keith Packard 2013-07-22 18:50:00 -07:00 committed by Dave Airlie
parent 9bba0c42ec
commit 62f2104f3f
4 changed files with 10 additions and 0 deletions
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3
drivers/gpu/drm/drm_crtc.c
View File

@ -3508,6 +3508,9 @@ 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;

3
drivers/gpu/drm/drm_ioctl.c
View File

@ -293,6 +293,9 @@ 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;
}

3
include/drm/drm_crtc.h
View File

@ -842,6 +842,9 @@ 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)

1
include/uapi/drm/drm.h
View File

@ -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