This is a note to let you know that I've just added the patch titled
drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
to the 3.14-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-radeon-properly-filter-dp1.2-4k-modes-on-non-dp1.2-hw.patch
and it can be found in the queue-3.14 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 410cce2a6b82299b46ff316c6384e789ce275ecb Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@xxxxxxx>
Date: Wed, 10 Dec 2014 09:42:10 -0500
Subject: drm/radeon: properly filter DP1.2 4k modes on non-DP1.2 hw
From: Alex Deucher <alexander.deucher@xxxxxxx>
commit 410cce2a6b82299b46ff316c6384e789ce275ecb upstream.
The check was already in place in the dp mode_valid check, but
radeon_dp_get_dp_link_clock() never returned the high clock
mode_valid was checking for because that function clipped the
clock based on the hw capabilities. Add an explicit check
in the mode_valid function.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=87172
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/radeon/atombios_dp.c | 4 ++++
1 file changed, 4 insertions(+)
--- a/drivers/gpu/drm/radeon/atombios_dp.c
+++ b/drivers/gpu/drm/radeon/atombios_dp.c
@@ -576,6 +576,10 @@ int radeon_dp_mode_valid_helper(struct d
struct radeon_connector_atom_dig *dig_connector;
int dp_clock;
+ if ((mode->clock > 340000) &&
+ (!radeon_connector_is_dp12_capable(connector)))
+ return MODE_CLOCK_HIGH;
+
if (!radeon_connector->con_priv)
return MODE_CLOCK_HIGH;
dig_connector = radeon_connector->con_priv;
Patches currently in stable-queue which might be from alexander.deucher@xxxxxxx are
queue-3.14/drm-radeon-fix-typo-in-ci-dpm-disable.patch
queue-3.14/drm-radeon-check-the-right-ring-in-radeon_evict_flags.patch
queue-3.14/drm-radeon-properly-filter-dp1.2-4k-modes-on-non-dp1.2-hw.patch
queue-3.14/drm-radeon-work-around-a-hw-bug-in-mgcg-on-cik.patch
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