[Bug 82829] [hsw Color] Intel Haswell GPU HD4400 has wrong color management on external screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=82829

--- Comment #7 from Jani Nikula <jani.nikula at intel.com> ---
I'd also be interested in dmesg with drm.debug=0xe running this patch on top of
drm-intel-nightly.

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 9c0ebf62c0cc..929fde9e5f6a 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -3744,6 +3744,10 @@ intel_dp_get_dpcd(struct intel_dp *intel_dp)
                                    DP_MAX_DOWNSTREAM_PORTS) < 0)
                return false; /* downstream port status fetch failed */

+       DRM_DEBUG_KMS("DPCD downstream ports: %*ph\n",
+                     (int) sizeof(intel_dp->downstream_ports),
+                     intel_dp->downstream_ports);
+
        return true;
 }

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