summaryrefslogtreecommitdiffstats
path: root/drivers
diff options
context:
space:
mode:
authorJani Nikula <jani.nikula@intel.com>2014-10-29 10:03:26 +0100
committerJani Nikula <jani.nikula@intel.com>2014-10-30 14:51:11 +0100
commit7809a61176b385ebb3299ea43c58b1bb31ffb8c0 (patch)
tree436fce21c4fdab0ff19c7cb6cf30d9957b271d71 /drivers
parentdrm/i915: Ignore VBT backlight check on Macbook 2, 1 (diff)
downloadlinux-7809a61176b385ebb3299ea43c58b1bb31ffb8c0.tar.xz
linux-7809a61176b385ebb3299ea43c58b1bb31ffb8c0.zip
drm/i915/dp: only use training pattern 3 on platforms that support it
Ivybridge + 30" monitor prints a drm error on every modeset, since IVB doesn't support DP3 we should even bother trying to use it. This regression has been introduced in commit 06ea66b6bb445043dc25a9626254d5c130093199 Author: Todd Previte <tprevite@gmail.com> Date: Mon Jan 20 10:19:39 2014 -0700 drm/i915: Enable 5.4Ghz (HBR2) link rate for Displayport 1.2-capable devices Reported-by: Dave Airlie <airlied@redhat.com> Reference: http://mid.gmane.org/1414566170-9868-1-git-send-email-airlied@gmail.com Cc: Todd Previte <tprevite@gmail.com> Cc: stable@vger.kernel.org (3.15+) Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com> Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/gpu/drm/i915/intel_dp.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 464d8ad9bb71..5ad45bfff3fe 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3731,9 +3731,10 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
}
}
- /* Training Pattern 3 support */
+ /* Training Pattern 3 support, both source and sink */
if (intel_dp->dpcd[DP_DPCD_REV] >= 0x12 &&
- intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED) {
+ intel_dp->dpcd[DP_MAX_LANE_COUNT] & DP_TPS3_SUPPORTED &&
+ (IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8)) {
intel_dp->use_tps3 = true;
DRM_DEBUG_KMS("Displayport TPS3 supported\n");
} else