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drm/vmwgfx: Fix a screen object framebuffer dirty corner case

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If there are no cliprects for a particular crtc, an invalid command would
have been generated. If that's the case, instead ditch the generated
command sequence.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
This commit is contained in:
Thomas Hellstrom 2016-02-12 08:26:37 +01:00
parent f3b3355073
commit fea7dd547b
1 changed files with 15 additions and 0 deletions
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15
drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c
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@ -738,6 +738,11 @@ static void vmw_sou_surface_fifo_commit(struct vmw_kms_dirty *dirty)
SVGASignedRect *blit = (SVGASignedRect *) &cmd[1];
int i;
if (!dirty->num_hits) {
vmw_fifo_commit(dirty->dev_priv, 0);
return;
}
cmd->header.id = SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN;
cmd->header.size = sizeof(cmd->body) + region_size;
@ -875,6 +880,11 @@ int vmw_kms_sou_do_surface_dirty(struct vmw_private *dev_priv,
*/
static void vmw_sou_dmabuf_fifo_commit(struct vmw_kms_dirty *dirty)
{
if (!dirty->num_hits) {
vmw_fifo_commit(dirty->dev_priv, 0);
return;
}
vmw_fifo_commit(dirty->dev_priv,
sizeof(struct vmw_kms_sou_dmabuf_blit) *
dirty->num_hits);
@ -967,6 +977,11 @@ out_revert:
*/
static void vmw_sou_readback_fifo_commit(struct vmw_kms_dirty *dirty)
{
if (!dirty->num_hits) {
vmw_fifo_commit(dirty->dev_priv, 0);
return;
}
vmw_fifo_commit(dirty->dev_priv,
sizeof(struct vmw_kms_sou_readback_blit) *
dirty->num_hits);