Commit 1bbefa38 authored Oct 16, 2020 by Nirmal Abraham Committed by Gerrit - the friendly Code Review server Oct 20, 2020

fbdev: msm: disable cpu sync during dma_buf_map_attachment



In some usecases, the CPU_SYNC attribute is causing around
2 - 2.5ms execution time per call to dma_buf_map_attachment
while mapping the display buffers causing frame drops.
Disable CPU SYNC to resolve this.

Change-Id: I5bdf2049b265d7ed8b0a42ac92bea57296aca9f6
Signed-off-by: Nirmal Abraham <nabrah@codeaurora.org>

parent 33a5e163

drivers/video/fbdev/msm/mdss_mdp_util.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -1027,7 +1027,7 @@ static int mdss_mdp_get_img(struct msmfb_data *img,


		data->srcp_attachment->dma_map_attrs \|=
		DMA_ATTR_DELAYED_UNMAP;
		(DMA_ATTR_DELAYED_UNMAP \| DMA_ATTR_SKIP_CPU_SYNC);

		data->srcp_table =
		dma_buf_map_attachment(data->srcp_attachment,