diff options
| author | Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com> | 2017-04-04 17:52:21 +0100 |
|---|---|---|
| committer | Daniel Stone <daniels@collabora.com> | 2017-04-04 20:59:12 +0100 |
| commit | 5db06a8a98f515f67446a69c57577c4c363ec65d (patch) | |
| tree | d9c5720e05dd7727bb2ed4ca2a1e8504be88d450 /drivers/gpu/drm/drm_ioctl.c | |
| parent | 1bbfe9d1a315bb573d4f10bbf443b68b5ddac473 (diff) | |
drm: Pass CRTC ID in userspace vblank events
With the atomic API, it is possible that a single commit affects
multiple crtcs. If the user requests an event with that commit, one
event will be sent for each CRTC, but it is not possible to distinguish
which crtc an event is for in user space. To solve this, the reserved
field in struct drm_vblank_event is repurposed to include the crtc_id
which the event is for.
The DRM_CAP_CRTC_IN_VBLANK_EVENT is added to allow userspace to query if
the crtc field will be set properly.
[daniels: Rebased, using Maarten's forward-port.]
Signed-off-by: Ander Conselvan de Oliveira <ander.conselvan.de.oliveira@intel.com>
Signed-off-by: Daniel Stone <daniels@collabora.com>
Cc: Maarten Lankhorst <maarten.lankhorst@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170404165221.28240-2-daniels@collabora.com
Diffstat (limited to 'drivers/gpu/drm/drm_ioctl.c')
| -rw-r--r-- | drivers/gpu/drm/drm_ioctl.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 9f4241f0dd9c..865e3ee4d743 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -286,6 +286,9 @@ static int drm_getcap(struct drm_device *dev, void *data, struct drm_file *file_ case DRM_CAP_ADDFB2_MODIFIERS: req->value = dev->mode_config.allow_fb_modifiers; break; + case DRM_CAP_CRTC_IN_VBLANK_EVENT: + req->value = 1; + break; default: return -EINVAL; } |