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drm/vmwgfx: Update comments for stdu plane update 

Update the 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 13:46:42 -07:00 committed by Thomas Hellstrom
parent 4606eeaf67
commit 88b37c3ae7
1 changed files with 3 additions and 15 deletions
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18
drivers/gpu/drm/vmwgfx/vmwgfx_stdu.c
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@ -1656,7 +1656,6 @@ static int vmw_stdu_plane_update_surface(struct vmw_private *dev_priv,
/**
* vmw_stdu_primary_plane_atomic_update - formally switches STDU to new plane
*
* @plane: display plane
* @old_state: Only used to get crtc info
*
@ -1677,10 +1676,7 @@ vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
struct vmw_private *dev_priv;
int ret;
/*
* We cannot really fail this function, so if we do, then output an
* error and maintain consistent atomic state.
*/
/* If case of device error, maintain consistent atomic state */
if (crtc && plane->state->fb) {
struct vmw_framebuffer *vfb =
vmw_framebuffer_to_vfb(plane->state->fb);
@ -1709,12 +1705,7 @@ vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
stdu = vmw_crtc_to_stdu(crtc);
dev_priv = vmw_priv(crtc->dev);
/*
* When disabling a plane, CRTC and FB should always be NULL
* together, otherwise it's an error.
* Here primary plane is being disable so blank the screen
* target display unit, if not already done.
*/
/* Blank STDU when fb and crtc are NULL */
if (!stdu->defined)
return;
@ -1729,11 +1720,8 @@ vmw_stdu_primary_plane_atomic_update(struct drm_plane *plane,
return;
}
/* In case of error, vblank event is send in 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;