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Commit d99f38ae authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/amdgpu/display: add flag for multi-display mclk switching 



Add a dcfeaturemask flag for mclk switching.  Disable by default;
enable once the feature has seen more testing.

Set amdgpu.dcfeaturemask=2 on the kernel command line in grub
to enable this.

Acked-by: default avatarEvan Quan <evan.quan@amd.com>
Reviewed-by: default avatarNicholas Kazlauskas <nicholas.kazlauskas@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent 8b2608f1

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

+3 −0
Original line number Diff line number Diff line
@@ -694,6 +694,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev) 
	if (amdgpu_dc_feature_mask & DC_FBC_MASK)

		init_data.flags.fbc_support = true;



	if (amdgpu_dc_feature_mask & DC_MULTI_MON_PP_MCLK_SWITCH_MASK)

		init_data.flags.multi_mon_pp_mclk_switch = true;



	init_data.flags.power_down_display_on_boot = true;



#ifdef CONFIG_DRM_AMD_DC_DCN2_0

drivers/gpu/drm/amd/display/dc/calcs/dce_calcs.c

+4 −1
Original line number Diff line number Diff line
@@ -3025,7 +3025,10 @@ bool bw_calcs(struct dc_context *ctx, 


	populate_initial_data(pipe, pipe_count, data);



	if (ctx->dc->config.multi_mon_pp_mclk_switch)

		calcs_output->all_displays_in_sync = all_displays_in_sync(pipe, pipe_count);

	else

		calcs_output->all_displays_in_sync = false;



	if (data->number_of_displays != 0) {

		uint8_t yclk_lvl, sclk_lvl;

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

+1 −1
Original line number Diff line number Diff line
@@ -220,7 +220,7 @@ struct dc_config { 
	bool power_down_display_on_boot;

	bool edp_not_connected;

	bool forced_clocks;



	bool multi_mon_pp_mclk_switch;

};



enum visual_confirm {

drivers/gpu/drm/amd/include/amd_shared.h

+1 −0
Original line number Diff line number Diff line
@@ -142,6 +142,7 @@ enum PP_FEATURE_MASK { 


enum DC_FEATURE_MASK {

	DC_FBC_MASK = 0x1,

	DC_MULTI_MON_PP_MCLK_SWITCH_MASK = 0x2,

};



enum amd_dpm_forced_level;