drm/vmwgfx: Fix a screen object framebuffer dirty corner case
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>
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@ -738,6 +738,11 @@ static void vmw_sou_surface_fifo_commit(struct vmw_kms_dirty *dirty)
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SVGASignedRect *blit = (SVGASignedRect *) &cmd[1];
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int i;
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if (!dirty->num_hits) {
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vmw_fifo_commit(dirty->dev_priv, 0);
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return;
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}
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cmd->header.id = SVGA_3D_CMD_BLIT_SURFACE_TO_SCREEN;
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cmd->header.size = sizeof(cmd->body) + region_size;
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@ -875,6 +880,11 @@ int vmw_kms_sou_do_surface_dirty(struct vmw_private *dev_priv,
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*/
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static void vmw_sou_dmabuf_fifo_commit(struct vmw_kms_dirty *dirty)
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{
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if (!dirty->num_hits) {
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vmw_fifo_commit(dirty->dev_priv, 0);
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return;
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}
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vmw_fifo_commit(dirty->dev_priv,
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sizeof(struct vmw_kms_sou_dmabuf_blit) *
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dirty->num_hits);
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@ -967,6 +977,11 @@ out_revert:
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*/
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static void vmw_sou_readback_fifo_commit(struct vmw_kms_dirty *dirty)
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{
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if (!dirty->num_hits) {
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vmw_fifo_commit(dirty->dev_priv, 0);
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return;
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}
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vmw_fifo_commit(dirty->dev_priv,
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sizeof(struct vmw_kms_sou_readback_blit) *
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dirty->num_hits);
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