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FAILED: patch "[PATCH] drm/amd/display: Consult MCCS FreeSync cap only if requested" failed to apply to 7.2-stable tree

PATCH [email protected] 1 participant 1 message Sep 16

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The patch below does not apply to the 7.2-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

To reproduce the conflict and resubmit, you may use the following commands:

git fetch https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ linux-7.2.y
git checkout FETCH_HEAD
git cherry-pick -x cfdcf5571c3107bf636002fc0c16ce93c19bd671
# <resolve conflicts, build, test, etc.>
git commit -s
git send-email --to '<[email protected]>' --in-reply-to '2026091625-unlisted-likely-9980@gregkh' --subject-prefix 'PATCH 7.2.y' 'HEAD^..'

Possible dependencies:

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From cfdcf5571c3107bf636002fc0c16ce93c19bd671 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <[email protected]>
Date: Mon, 18 May 2026 17:48:09 +0200
Subject: [PATCH] drm/amd/display: Consult MCCS FreeSync cap only if requested
& supported
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

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 6f71d5dd3206 ("drm/amd/display: Read sink freesync support via mccs")
(cherry picked from commit ac3aea794fb4156467b4b3b92c3155d95bf435c9)
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_connector.c +6 -8
index c8a1ab8c3b16..d03773887214 100644
@@ -3937,17 +3937,15 @@ 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)