diff options
| author | Paul Hsieh <Paul.Hsieh@amd.com> | 2025-09-05 11:38:21 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2025-09-23 10:26:47 -0400 |
| commit | 74d70e309d155550c9bd8bce74812875df47fb7b (patch) | |
| tree | 2e2550f119ed41a41edfdb8ec03cc9c375676ce8 /drivers | |
| parent | drm/amd/display: Add AVI infoframe copy in copy_stream_update_to_stream (diff) | |
| download | linux-74d70e309d155550c9bd8bce74812875df47fb7b.tar.gz linux-74d70e309d155550c9bd8bce74812875df47fb7b.zip | |
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: 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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_types.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c | 14 |
2 files changed, 15 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h index 619834a328a3..b5aa03a3e39c 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -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 */ diff --git a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c index 8b7b87b21c2e..5e806edbb9f6 100644 --- a/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c +++ b/drivers/gpu/drm/amd/display/dc/link/protocols/link_edp_panel_control.c @@ -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( |