Commit 62f2104f authored by Keith Packard's avatar Keith Packard Committed by Dave Airlie
Browse files

drm: Advertise async page flip ability through GETCAP ioctl 



Let applications know whether the kernel supports asynchronous page
flipping.

Signed-off-by: default avatarKeith Packard <keithp@keithp.com>
Signed-off-by: default avatarDave Airlie <airlied@gmail.com>
parent 9bba0c42

drivers/gpu/drm/drm_crtc.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

drivers/gpu/drm/drm_ioctl.c

+3 −0
Original line number Diff line number Diff line
@@ -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;

	}

include/drm/drm_crtc.h

+3 −0
Original line number Diff line number Diff line
@@ -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)

include/uapi/drm/drm.h

+1 −0
Original line number Diff line number Diff line
@@ -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