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drm/amd/display: Consult MCCS FreeSync cap only if requested & supported

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When the do_mccs parameter is false, we don't call
dm_helpers_read_mccs_caps, so sink->mccs_caps.freesync_supported is
unlikely to be true.

Fixes: 6f71d5dd32 ("drm/amd/display: Read sink freesync support via mccs")
Bug: https://gitlab.freedesktop.org/drm/amd/-/work_items/5286
Signed-off-by: Michel Dänzer <mdaenzer@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
(cherry picked from commit 115bf5ca31)
This commit is contained in:
Michel Dänzer 2026-05-18 17:48:09 +02:00 committed by Alex Deucher
parent a50676d5a7
commit 2eeb342aff
1 changed files with 6 additions and 8 deletions
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14
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -13446,17 +13446,15 @@ void amdgpu_dm_update_freesync_caps(struct drm_connector *connector,
}
/* Handle MCCS */
if (do_mccs)
if (do_mccs) {
dm_helpers_read_mccs_caps(adev->dm.dc->ctx, amdgpu_dm_connector->dc_link, sink);
if ((sink->sink_signal == SIGNAL_TYPE_HDMI_TYPE_A ||
as_type == FREESYNC_TYPE_PCON_IN_WHITELIST) &&
(!sink->edid_caps.freesync_vcp_code ||
(sink->edid_caps.freesync_vcp_code && !sink->mccs_caps.freesync_supported)))
freesync_capable = false;
if (sink->edid_caps.freesync_vcp_code && !sink->mccs_caps.freesync_supported)
freesync_capable = false;
if (do_mccs && sink->mccs_caps.freesync_supported && freesync_capable)
dm_helpers_mccs_vcp_set(adev->dm.dc->ctx, amdgpu_dm_connector->dc_link, sink);
if (sink->mccs_caps.freesync_supported && freesync_capable)
dm_helpers_mccs_vcp_set(adev->dm.dc->ctx, amdgpu_dm_connector->dc_link, sink);
}
update:
if (dm_con_state)