From b51178d6edddbfc8cb4da5b5e9c924f2d24bbcac Mon Sep 17 00:00:00 2001 From: Duncan Ma Date: Tue, 8 Feb 2022 15:05:09 -0500 Subject: [PATCH] drm/amd/display: Set compbuf size to min at prep prevent overbook crb [Why] Detbuffer size is dynamically set for dcn31x. At certain moment, compbuf+(def size * num pipes) > config return buffer size causing flickering. This is easily reproducible when MPO is enabled with two displays. [How] At prepare BW, use the min comp buffer size. When it is to optimize BW, set compbuf size back to maximum possible size. Reviewed-by: Charlene Liu Acked-by: Qingqing Zhuo Signed-off-by: Duncan Ma Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c index f22158bb4b137..46b170e60a54c 100644 --- a/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c +++ b/drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c @@ -147,6 +147,7 @@ struct _vcs_dpi_ip_params_st dcn3_15_ip = { .hostvm_max_page_table_levels = 2, .rob_buffer_size_kbytes = 64, .det_buffer_size_kbytes = DCN3_15_DEFAULT_DET_SIZE, + .min_comp_buffer_size_kbytes = DCN3_15_MIN_COMPBUF_SIZE_KB, .config_return_buffer_size_in_kbytes = 1024, .compressed_buffer_segment_size_in_kbytes = 64, .meta_fifo_size_in_kentries = 32, -- 2.30.2