Commit ae308e93 authored by Iswara Nagulendran's avatar Iswara Nagulendran Committed by Alex Deucher
Browse files

drm/amd/display: Restrict multi-disp support for in-game FAMS 



[HOW&WHY]
In multi-monitor cases the VBLANK stretch that is required to align both
monitors may be so large that it may create issues for gaming performance.

Use debug value to restrict in-game FAMS support for multi-disp use case.

Reviewed-by: default avatarHarry Vanzylldejong <harry.vanzylldejong@amd.com>
Acked-by: default avatarWayne Lin <wayne.lin@amd.com>
Signed-off-by: default avatarIswara Nagulendran <iswara.nagulendran@amd.com>
Tested-by: default avatarDaniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 69925c00

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

+7 −1
Original line number Diff line number Diff line
@@ -499,6 +499,12 @@ enum dcc_option { 
	DCC_HALF_REQ_DISALBE = 2,

};



enum in_game_fams_config {

	INGAME_FAMS_SINGLE_DISP_ENABLE, // enable in-game fams

	INGAME_FAMS_DISABLE, // disable in-game fams

	INGAME_FAMS_MULTI_DISP_ENABLE, //enable in-game fams for multi-display

};



/**

 * enum pipe_split_policy - Pipe split strategy supported by DCN

 *
@@ -951,7 +957,7 @@ struct dc_debug_options { 
	/* Enable dmub aux for legacy ddc */

	bool enable_dmub_aux_for_legacy_ddc;

	bool disable_fams;

	bool disable_fams_gaming;

	enum in_game_fams_config disable_fams_gaming;

	/* FEC/PSR1 sequence enable delay in 100us */

	uint8_t fec_enable_delay_in100us;

	bool enable_driver_sequence_debug;

drivers/gpu/drm/amd/display/dc/dcn32/dcn32_resource_helpers.c

+3 −1
Original line number Diff line number Diff line
@@ -580,7 +580,9 @@ struct dc_stream_state *dcn32_can_support_mclk_switch_using_fw_based_vblank_stre 
	if (!fpo_candidate_stream->allow_freesync)

		return NULL;



	if (fpo_candidate_stream->vrr_active_variable && dc->debug.disable_fams_gaming)

	if (fpo_candidate_stream->vrr_active_variable &&

	((dc->debug.disable_fams_gaming == INGAME_FAMS_DISABLE) ||

	(context->stream_count > 1 && !(dc->debug.disable_fams_gaming == INGAME_FAMS_MULTI_DISP_ENABLE))))

		return NULL;



	return fpo_candidate_stream;

drivers/gpu/drm/amd/display/dc/resource/dcn30/dcn30_resource.c

+1 −1
Original line number Diff line number Diff line
@@ -1996,7 +1996,7 @@ bool dcn30_can_support_mclk_switch_using_fw_based_vblank_stretch(struct dc *dc, 
	if (!context->streams[0]->allow_freesync)

		return false;



	if (context->streams[0]->vrr_active_variable && dc->debug.disable_fams_gaming)

	if (context->streams[0]->vrr_active_variable && (dc->debug.disable_fams_gaming == INGAME_FAMS_DISABLE))

		return false;



	context->streams[0]->fpo_in_use = true;