From: <gregkh@linuxfoundation.org>
To: alexander.deucher@amd.com, gregkh@linuxfoundation.org
Cc: <stable@vger.kernel.org>, <stable-commits@vger.kernel.org>
Subject: Patch "drm/amdgpu: fix DP mode validation" has been added to the 4.5-stable tree
Date: Mon, 16 May 2016 11:26:20 -0700 [thread overview]
Message-ID: <146342318016768@kroah.com> (raw)
This is a note to let you know that I've just added the patch titled
drm/amdgpu: fix DP mode validation
to the 4.5-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-amdgpu-fix-dp-mode-validation.patch
and it can be found in the queue-4.5 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 c47b9e0944e483309d66c807d650ac8b8ceafb57 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 11 May 2016 16:21:03 -0400
Subject: drm/amdgpu: fix DP mode validation
From: Alex Deucher <alexander.deucher@amd.com>
commit c47b9e0944e483309d66c807d650ac8b8ceafb57 upstream.
Switch the order of the loops to walk the rates on the top
so we exhaust all DP 1.1 rate/lane combinations before trying
DP 1.2 rate/lane combos.
This avoids selecting rates that are supported by the monitor,
but not the connector leading to valid modes getting rejected.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=95206
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/gpu/drm/amd/amdgpu/atombios_dp.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
--- a/drivers/gpu/drm/amd/amdgpu/atombios_dp.c
+++ b/drivers/gpu/drm/amd/amdgpu/atombios_dp.c
@@ -276,8 +276,8 @@ static int amdgpu_atombios_dp_get_dp_lin
}
}
} else {
- for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
- for (i = 0; i < ARRAY_SIZE(link_rates) && link_rates[i] <= max_link_rate; i++) {
+ for (i = 0; i < ARRAY_SIZE(link_rates) && link_rates[i] <= max_link_rate; i++) {
+ for (lane_num = 1; lane_num <= max_lane_num; lane_num <<= 1) {
max_pix_clock = (lane_num * link_rates[i] * 8) / bpp;
if (max_pix_clock >= pix_clock) {
*dp_lanes = lane_num;
Patches currently in stable-queue which might be from alexander.deucher@amd.com are
queue-4.5/drm-radeon-fix-pll-sharing-on-dce6.1-v2.patch
queue-4.5/drm-amdgpu-fix-dp-mode-validation.patch
queue-4.5/drm-radeon-fix-dp-mode-validation.patch
queue-4.5/drm-radeon-fix-dp-link-training-issue-with-second-4k-monitor.patch
reply other threads:[~2016-05-16 18:34 UTC|newest]
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