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drm/vmwgfx: Update comments for sou plane update function 

Update comments to sync with code.

Signed-off-by: Deepak Rawat <drawat@vmware.com>
Reviewed-by: Thomas Hellstrom <thellstrom@vmware.com>
Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
This commit is contained in:
Deepak Rawat 2018-09-21 14:10:35 -07:00 committed by Thomas Hellstrom
parent 67a51b3d98
commit 31da2df8ce
1 changed files with 3 additions and 15 deletions
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18
drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
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@ -770,6 +770,7 @@ vmw_sou_primary_plane_atomic_update(struct drm_plane *plane,
struct vmw_fence_obj *fence = NULL;
int ret;
/* In case of device error, maintain consistent atomic state */
if (crtc && plane->state->fb) {
struct vmw_private *dev_priv = vmw_priv(crtc->dev);
struct vmw_framebuffer *vfb =
@ -782,28 +783,15 @@ vmw_sou_primary_plane_atomic_update(struct drm_plane *plane,
ret = vmw_sou_plane_update_surface(dev_priv, plane,
old_state, vfb,
&fence);
/*
* We cannot really fail this function, so if we do, then output
* an error and maintain consistent atomic state.
*/
if (ret != 0)
DRM_ERROR("Failed to update screen.\n");
} else {
/*
* When disabling a plane, CRTC and FB should always be NULL
* together, otherwise it's an error.
* Here primary plane is being disable so should really blank
* the screen object display unit, if not already done.
*/
/* Do nothing when fb and crtc is NULL (blank crtc) */
return;
}
/* For error case vblank event is send from vmw_du_crtc_atomic_flush */
event = crtc->state->event;
/*
* In case of failure and other cases, vblank event will be sent in
* vmw_du_crtc_atomic_flush.
*/
if (event && fence) {
struct drm_file *file_priv = event->base.file_priv;