Commit 74d70e30 authored by Paul Hsieh's avatar Paul Hsieh Committed by Alex Deucher
Browse files

drm/amd/display: Add monitor patch to read psr cap again 



[Why & How]
According to the vendor’s requirement, after each OUI write,
the PSR cap must be read; otherwise, the vendor will default
to using PSRSU. But its PSR cap indicates that it only supports
PSR1.

Reviewed-by: default avatarWenjing Liu <wenjing.liu@amd.com>
Signed-off-by: default avatarPaul Hsieh <Paul.Hsieh@amd.com>
Signed-off-by: default avatarIvan Lipski <ivan.lipski@amd.com>
Tested-by: default avatarDan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: default avatarAlex Deucher <alexander.deucher@amd.com>
parent c8bedab2

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

+1 −0
Original line number Diff line number Diff line
@@ -1217,6 +1217,7 @@ struct dc_panel_config { 
		bool rc_disable;

		bool rc_allow_static_screen;

		bool rc_allow_fullscreen_VPB;

		bool read_psrcap_again;

		unsigned int replay_enable_option;

	} psr;

	/* ABM */

drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c

+14 −0
Original line number Diff line number Diff line
@@ -703,6 +703,20 @@ bool edp_setup_psr(struct dc_link *link, 
	if (!link)

		return false;



	/* This is a workaround: some vendors require the source to

	 * read the PSR cap; otherwise, the vendor's PSR feature will

	 * fall back to its default behavior, causing a misconfiguration

	 * of this feature.

	 */

	if (link->panel_config.psr.read_psrcap_again) {

		dm_helpers_dp_read_dpcd(

			link->ctx,

			link,

			DP_PSR_SUPPORT,

			&link->dpcd_caps.psr_info.psr_version,

			sizeof(link->dpcd_caps.psr_info.psr_version));

	}



	//Clear PSR cfg

	memset(&psr_configuration, 0, sizeof(psr_configuration));

	dm_helpers_dp_write_dpcd(