Commit b51178d6 authored by Duncan Ma's avatar Duncan Ma Committed by Alex Deucher
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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: default avatarCharlene Liu <Charlene.Liu@amd.com>
Acked-by: default avatarQingqing Zhuo <qingqing.zhuo@amd.com>
Signed-off-by: default avatarDuncan Ma <duncanma@amd.com>
Reviewed-by: default avatarHarry Wentland <harry.wentland@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 5b45b1c8

drivers/gpu/drm/amd/display/dc/dcn315/dcn315_resource.c

+1 −0
Original line number Diff line number Diff line
@@ -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,