4.14-stable review patch. If anyone has any objections, please let me know.
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From: Deepak Rawat drawat@vmware.com
commit 91ba9f28a3de97761c2b5fd5df5d88421268e507 upstream.
SOU primary plane prepare_fb hook depends upon dmabuf_size to pin up BO (and not call a new vmw_dmabuf_init) when a new fb size is same as current fb. This was changed in a recent commit which is causing page_flip to fail on VM with low display memory and multi-mon failure when cycle monitors from secondary display.
Cc: stable@vger.kernel.org # 4.14, 4.16 Fixes: 20fb5a635a0c ("drm/vmwgfx: Unpin the screen object backup buffer when not used") Signed-off-by: Deepak Rawat drawat@vmware.com Reviewed-by: Sinclair Yeh syeh@vmware.com Signed-off-by: Thomas Hellstrom thellstrom@vmware.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c | 2 ++ 1 file changed, 2 insertions(+)
--- a/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_scrn.c @@ -530,6 +530,8 @@ vmw_sou_primary_plane_prepare_fb(struct return ret; }
+ vps->dmabuf_size = size; + /* * TTM already thinks the buffer is pinned, but make sure the * pin_count is upped.