This is a note to let you know that I've just added the patch titled
drm/i915/bios: ignore HDMI on port A
to the 4.4-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-i915-bios-ignore-hdmi-on-port-a.patch
and it can be found in the queue-4.4 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 2ba7d7e0437127314864238f8bfcb8369d81075c Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@xxxxxxxxx>
Date: Thu, 21 Sep 2017 17:19:20 +0300
Subject: drm/i915/bios: ignore HDMI on port A
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From: Jani Nikula <jani.nikula@xxxxxxxxx>
commit 2ba7d7e0437127314864238f8bfcb8369d81075c upstream.
The hardware state readout oopses after several warnings when trying to
use HDMI on port A, if such a combination is configured in VBT. Filter
the combo out already at the VBT parsing phase.
v2: also ignore DVI (Ville)
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=102889
Cc: Imre Deak <imre.deak@xxxxxxxxx>
Reviewed-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Tested-by: Daniel Drake <dan@xxxxxxxxxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20170921141920.18172-1-jani.nikula@xxxxxxxxx
(cherry picked from commit d27ffc1d00327c29b3aa97f941b42f0949f9e99f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_bios.c | 7 +++++++
1 file changed, 7 insertions(+)
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -957,6 +957,13 @@ static void parse_ddi_port(struct drm_i9
is_hdmi = is_dvi && (child->common.device_type & DEVICE_TYPE_NOT_HDMI_OUTPUT) == 0;
is_edp = is_dp && (child->common.device_type & DEVICE_TYPE_INTERNAL_CONNECTOR);
+ if (port == PORT_A && is_dvi) {
+ DRM_DEBUG_KMS("VBT claims port A supports DVI%s, ignoring\n",
+ is_hdmi ? "/HDMI" : "");
+ is_dvi = false;
+ is_hdmi = false;
+ }
+
info->supports_dvi = is_dvi;
info->supports_hdmi = is_hdmi;
info->supports_dp = is_dp;
Patches currently in stable-queue which might be from jani.nikula@xxxxxxxxx are
queue-4.4/drm-i915-bios-ignore-hdmi-on-port-a.patch