Commit e4d983ac authored by Simon Ser's avatar Simon Ser
Browse files

drm: introduce DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP 



This new kernel capability indicates whether async page-flips are
supported via the atomic uAPI. DRM clients can use it to check
for support before feeding DRM_MODE_PAGE_FLIP_ASYNC to the kernel.

Make it clear that DRM_CAP_ASYNC_PAGE_FLIP is for legacy uAPI only.

Signed-off-by: default avatarSimon Ser <contact@emersion.fr>
Reviewed-by: default avatarAndré Almeida <andrealmeid@igalia.com>
Reviewed-by: default avatarAlex Deucher <alexander.deucher@amd.com>
Signed-off-by: default avatarAndré Almeida <andrealmeid@igalia.com>
Signed-off-by: default avatarSimon Ser <contact@emersion.fr>
Link: https://patchwork.freedesktop.org/patch/msgid/20231122161941.320564-4-andrealmeid@igalia.com
parent 4b4af74a

drivers/gpu/drm/drm_ioctl.c

+4 −0
Original line number Diff line number Diff line
@@ -301,6 +301,10 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_ 
	case DRM_CAP_CRTC_IN_VBLANK_EVENT:

		req->value = 1;

		break;

	case DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP:

		req->value = drm_core_check_feature(dev, DRIVER_ATOMIC) &&

			     dev->mode_config.async_page_flip;

		break;

	default:

		return -EINVAL;

	}

include/uapi/drm/drm.h

+9 −1
Original line number Diff line number Diff line
@@ -713,7 +713,8 @@ struct drm_gem_open { 
/**

 * DRM_CAP_ASYNC_PAGE_FLIP

 *

 * If set to 1, the driver supports &DRM_MODE_PAGE_FLIP_ASYNC.

 * If set to 1, the driver supports &DRM_MODE_PAGE_FLIP_ASYNC for legacy

 * page-flips.

 */

#define DRM_CAP_ASYNC_PAGE_FLIP		0x7

/**
@@ -773,6 +774,13 @@ struct drm_gem_open { 
 * :ref:`drm_sync_objects`.

 */

#define DRM_CAP_SYNCOBJ_TIMELINE	0x14

/**

 * DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP

 *

 * If set to 1, the driver supports &DRM_MODE_PAGE_FLIP_ASYNC for atomic

 * commits.

 */

#define DRM_CAP_ATOMIC_ASYNC_PAGE_FLIP	0x15



/* DRM_IOCTL_GET_CAP ioctl argument type */

struct drm_get_cap {