Patch "Revert "drm/radeon: fix DP link training issue with second 4K monitor"" has been added to the 4.8-stable tree

Patch "Revert "drm/radeon: fix DP link training issue with second 4K monitor"" has been added to the 4.8-stable tree

[gregkh]

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

    Revert "drm/radeon: fix DP link training issue with second 4K monitor"

to the 4.8-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:
     revert-drm-radeon-fix-dp-link-training-issue-with-second-4k-monitor.patch
and it can be found in the queue-4.8 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 9dc79965b21967caebde575f5f5d8bf1aa2c23ab Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Michel=20D=C3=A4nzer?= <michel.daenzer@amd.com>
Date: Mon, 24 Oct 2016 16:52:20 +0900
Subject: Revert "drm/radeon: fix DP link training issue with second 4K monitor"
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Michel Dänzer <michel.daenzer@amd.com>

commit 9dc79965b21967caebde575f5f5d8bf1aa2c23ab upstream.

This reverts commit 1a738347df2ee4977459a8776fe2c62196bdcb1b.

It caused at least some Kaveri laptops to incorrectly report DisplayPort
connectors as connected.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97857
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/radeon_dp_auxch.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/radeon/radeon_dp_auxch.c
+++ b/drivers/gpu/drm/radeon/radeon_dp_auxch.c
@@ -105,7 +105,7 @@ radeon_dp_aux_transfer_native(struct drm
 
 	tmp &= AUX_HPD_SEL(0x7);
 	tmp |= AUX_HPD_SEL(chan->rec.hpd);
-	tmp |= AUX_EN | AUX_LS_READ_EN | AUX_HPD_DISCON(0x1);
+	tmp |= AUX_EN | AUX_LS_READ_EN;
 
 	WREG32(AUX_CONTROL + aux_offset[instance], tmp);
 


Patches currently in stable-queue which might be from michel.daenzer@amd.com are

queue-4.8/revert-drm-radeon-fix-dp-link-training-issue-with-second-4k-monitor.patch