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

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[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: Wenjing Liu <wenjing.liu@amd.com>
Signed-off-by: Paul Hsieh <Paul.Hsieh@amd.com>
Signed-off-by: Ivan Lipski <ivan.lipski@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Paul Hsieh 2025-09-05 11:38:21 +08:00 committed by Alex Deucher
parent c8bedab2d9
commit 74d70e309d
2 changed files with 15 additions and 0 deletions
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1
drivers/gpu/drm/amd/display/dc/dc_types.h
View File

@ -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 */

14
drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c
View File

@ -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(