Commit 3fc98044 authored by Zhongwei's avatar Zhongwei Committed by Alex Deucher
Browse files

drm/amd/display: Monitor patch to call blank_stream() before otg off 



[Why]
Turning off OTG before DIG is on and backlight is on, might cause:

DIG FIFO underflow.
EDP output unexpected video data. That might violate EDP spec.
EDP spec requires black light should be off before validate
video data is turned off.

Currently garbage issue only occurs in one type of EDP to MIPI converter.

[How]
Add monitor patch to call blank_stream() before disable_crtc().
That will be no impact for current sequence.

If there are more types of EDP panels meeting this issue later,
we might remove this monitor patch and fix the current sequence.

Reviewed-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: default avatarZhongwei <Zhongwei.Zhang@amd.com>
Signed-off-by: default avatarAurabindo Pillai <aurabindo.pillai@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent faee3edf

drivers/gpu/drm/amd/display/dc/dc_types.h

+1 −0
Original line number Diff line number Diff line
@@ -178,6 +178,7 @@ struct dc_panel_patch { 
	unsigned int skip_avmute;

	unsigned int mst_start_top_delay;

	unsigned int remove_sink_ext_caps;

	uint8_t blankstream_before_otg_off;

};



struct dc_edid_caps {

drivers/gpu/drm/amd/display/dc/hwss/dcn31/dcn31_hwseq.c

+5 −0
Original line number Diff line number Diff line
@@ -517,6 +517,11 @@ static void dcn31_reset_back_end_for_pipe( 


	dc->hwss.set_abm_immediate_disable(pipe_ctx);



	if ((!pipe_ctx->stream->dpms_off || pipe_ctx->stream->link->link_status.link_active)

		&& pipe_ctx->stream->sink && pipe_ctx->stream->sink->edid_caps.panel_patch.blankstream_before_otg_off) {

		dc->hwss.blank_stream(pipe_ctx);

	}



	pipe_ctx->stream_res.tg->funcs->set_dsc_config(

			pipe_ctx->stream_res.tg,

			OPTC_DSC_DISABLED, 0, 0);