diff options
| author | Wayne Lin <Wayne.Lin@amd.com> | 2026-03-03 13:55:42 +0800 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2026-04-17 15:20:56 -0400 |
| commit | 6f71d5dd320663f2003fff252a5da93f4f753bef (patch) | |
| tree | 01711ac9df24bdc1109b830e2429d78cced0fc21 /drivers/gpu/drm/amd/display/dc | |
| parent | 72022bad019e038c647a8ea50193ed30459fdb19 (diff) | |
drm/amd/display: Read sink freesync support via mccs
If EDID AMD VSDB declares that sink supports MCCS method for freesync
usage, send mccs request to understand sink freesync current supporting
state.
If sink supports freesync but user toggles OSD to turn off it, disable
freesync.
If HDMI sink doesn't support MCCS method for freesync usage, disable
freesync as well.
Reviewed-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Wayne Lin <Wayne.Lin@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Dan Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/amd/display/dc')
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dc_types.h | 4 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/dm_helpers.h | 5 | ||||
| -rw-r--r-- | drivers/gpu/drm/amd/display/dc/link/link_detection.c | 14 |
4 files changed, 24 insertions, 0 deletions
diff --git a/drivers/gpu/drm/amd/display/dc/dc.h b/drivers/gpu/drm/amd/display/dc/dc.h index 5ceadcdca524..7d170eaeb163 100644 --- a/drivers/gpu/drm/amd/display/dc/dc.h +++ b/drivers/gpu/drm/amd/display/dc/dc.h @@ -2725,6 +2725,7 @@ struct dc_sink { struct stereo_3d_features features_3d[TIMING_3D_FORMAT_MAX]; bool converter_disable_audio; + struct mccs_caps mccs_caps; struct scdc_caps scdc_caps; struct dc_sink_dsc_caps dsc_caps; struct dc_sink_fec_caps fec_caps; diff --git a/drivers/gpu/drm/amd/display/dc/dc_types.h b/drivers/gpu/drm/amd/display/dc/dc_types.h index 5b7490a7dc7a..7672ee88be82 100644 --- a/drivers/gpu/drm/amd/display/dc/dc_types.h +++ b/drivers/gpu/drm/amd/display/dc/dc_types.h @@ -1315,6 +1315,10 @@ struct dc_panel_config { } rio; }; +struct mccs_caps { + bool freesync_supported; +}; + #define MAX_SINKS_PER_LINK 4 /* diff --git a/drivers/gpu/drm/amd/display/dc/dm_helpers.h b/drivers/gpu/drm/amd/display/dc/dm_helpers.h index 2818df555e62..3aa2b11f559b 100644 --- a/drivers/gpu/drm/amd/display/dc/dm_helpers.h +++ b/drivers/gpu/drm/amd/display/dc/dm_helpers.h @@ -181,6 +181,11 @@ enum dc_edid_status dm_helpers_read_local_edid( struct dc_link *link, struct dc_sink *sink); +void dm_helpers_read_mccs_caps( + struct dc_context *ctx, + struct dc_link *link, + struct dc_sink *sink); + bool dm_helpers_dp_handle_test_pattern_request( struct dc_context *ctx, const struct dc_link *link, diff --git a/drivers/gpu/drm/amd/display/dc/link/link_detection.c b/drivers/gpu/drm/amd/display/dc/link/link_detection.c index 714370e773c1..794dd6a95918 100644 --- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c +++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c @@ -1234,6 +1234,20 @@ static bool detect_link_and_local_sink(struct dc_link *link, if (dc_is_hdmi_signal(link->connector_signal)) read_scdc_caps(link->ddc, link->local_sink); + /* When FreeSync is toggled through OSD, + * we see same EDID no matter what. Check MCCS caps + * to see if we should update FreeSync caps now. + */ + dm_helpers_read_mccs_caps( + link->ctx, + link, + sink); + + if (prev_sink != NULL) { + if (memcmp(&sink->mccs_caps, &prev_sink->mccs_caps, sizeof(struct mccs_caps))) + same_edid = false; + } + if (link->connector_signal == SIGNAL_TYPE_DISPLAY_PORT && sink_caps.transaction_type == DDC_TRANSACTION_TYPE_I2C_OVER_AUX) { |