Patch "drm/amd/display: limit DPIA link rate to HBR3" has been added to the 6.3-stable tree

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This is a note to let you know that I've just added the patch titled

    drm/amd/display: limit DPIA link rate to HBR3

to the 6.3-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-amd-display-limit-dpia-link-rate-to-hbr3.patch
and it can be found in the queue-6.3 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 7c5835bcb9176df94683396f1c0e5df6bf5094b3 Mon Sep 17 00:00:00 2001
From: Peichen Huang <peichen.huang@xxxxxxx>
Date: Wed, 31 May 2023 13:36:14 +0800
Subject: drm/amd/display: limit DPIA link rate to HBR3

From: Peichen Huang <peichen.huang@xxxxxxx>

commit 7c5835bcb9176df94683396f1c0e5df6bf5094b3 upstream.

[Why]
DPIA doesn't support UHBR, driver should not enable UHBR
for dp tunneling

[How]
limit DPIA link rate to HBR3

Cc: Mario Limonciello <mario.limonciello@xxxxxxx>
Cc: Alex Deucher <alexander.deucher@xxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Acked-by: Stylon Wang <stylon.wang@xxxxxxx>
Signed-off-by: Peichen Huang <peichen.huang@xxxxxxx>
Reviewed-by: Mustapha Ghaddar <Mustapha.Ghaddar@xxxxxxx>
Tested-by: Daniel Wheeler <daniel.wheeler@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/amd/display/dc/link/link_detection.c |    5 +++++
 1 file changed, 5 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/link/link_detection.c
+++ b/drivers/gpu/drm/amd/display/dc/link/link_detection.c
@@ -980,6 +980,11 @@ static bool detect_link_and_local_sink(s
 					(link->dpcd_caps.dongle_type !=
 							DISPLAY_DONGLE_DP_HDMI_CONVERTER))
 				converter_disable_audio = true;
+
+			/* limited link rate to HBR3 for DPIA until we implement USB4 V2 */
+			if (link->ep_type == DISPLAY_ENDPOINT_USB4_DPIA &&
+					link->reported_link_cap.link_rate > LINK_RATE_HIGH3)
+				link->reported_link_cap.link_rate = LINK_RATE_HIGH3;
 			break;
 		}
 


Patches currently in stable-queue which might be from peichen.huang@xxxxxxx are

queue-6.3/drm-amd-display-limit-dpia-link-rate-to-hbr3.patch



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