Patch "drm/bridge: tc358767: fix AUXDATAn registers access" has been added to the 4.9-stable tree

Patch "drm/bridge: tc358767: fix AUXDATAn registers access" has been added to the 4.9-stable tree

[gregkh]

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

    drm/bridge: tc358767: fix AUXDATAn registers access

to the 4.9-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-bridge-tc358767-fix-auxdatan-registers-access.patch
and it can be found in the queue-4.9 subdirectory.

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


>From foo@baz Thu Feb  1 14:00:34 CET 2018
From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Date: Tue, 7 Nov 2017 19:56:23 +0300
Subject: drm/bridge: tc358767: fix AUXDATAn registers access

From: Andrey Gusakov <andrey.gusakov@cogentembedded.com>


[ Upstream commit 9217c1abbc145a77d65c476cf2004a3df02104c7 ]

First four bytes should go to DP0_AUXWDATA0. Due to bug if
len > 4 first four bytes was writen to DP0_AUXWDATA1 and all
data get shifted by 4 bytes. Fix it.

Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Andrey Gusakov <andrey.gusakov@cogentembedded.com>
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1510073785-16108-6-git-send-email-andrey.gusakov@cogentembedded.com
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 drivers/gpu/drm/bridge/tc358767.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -318,7 +318,7 @@ static ssize_t tc_aux_transfer(struct dr
 				tmp = (tmp << 8) | buf[i];
 			i++;
 			if (((i % 4) == 0) || (i == size)) {
-				tc_write(DP0_AUXWDATA(i >> 2), tmp);
+				tc_write(DP0_AUXWDATA((i - 1) >> 2), tmp);
 				tmp = 0;
 			}
 		}


Patches currently in stable-queue which might be from andrey.gusakov@cogentembedded.com are

queue-4.9/drm-bridge-tc358767-fix-timing-calculations.patch
queue-4.9/drm-bridge-tc358767-fix-auxdatan-registers-access.patch
queue-4.9/drm-bridge-tc358767-filter-out-too-high-modes.patch
queue-4.9/drm-bridge-tc358767-fix-1-lane-behavior.patch
queue-4.9/drm-bridge-tc358767-fix-dp0_misc-register-set.patch
queue-4.9/drm-bridge-tc358767-do-no-fail-on-hi-res-displays.patch