This is a note to let you know that I've just added the patch titled
drm/i915: Reject HDMI 12bpc if the sink doesn't indicate support
to the 4.10-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-reject-hdmi-12bpc-if-the-sink-doesn-t-indicate-support.patch
and it can be found in the queue-4.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 9c31b087348cb2b5e668261f2eee2f224b3780b5 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= <ville.syrjala@xxxxxxxxxxxxxxx>
Date: Mon, 13 Feb 2017 19:58:18 +0200
Subject: drm/i915: Reject HDMI 12bpc if the sink doesn't indicate support
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From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
commit 9c31b087348cb2b5e668261f2eee2f224b3780b5 upstream.
Check that the sink really declared 12bpc support before we enable it.
This should not actually never happen since it's mandatory for HDMI
sinks to support 12bpc if they support any deep color modes. But
reality disagrees with the theory and there are actually sinks in
the wild that violate the spec.
v2: Fix the output_types check
Update commit message to state that these things are in fact real
Cc: Nicholas Sielicki <nicholas.sielicki@xxxxxxxxx>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=99250
Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx>
Link: http://patchwork.freedesktop.org/patch/msgid/20170213175818.24958-1-ville.syrjala@xxxxxxxxxxxxxxx
Reviewed-by: Shashank Sharma <shashank.sharma@xxxxxxxxx>
(cherry picked from commit c750bdd3e7e204cc88b32806c3864487a03cd84b)
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_hdmi.c | 24 +++++++++++++++++++++---
1 file changed, 21 insertions(+), 3 deletions(-)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -1293,16 +1293,34 @@ intel_hdmi_mode_valid(struct drm_connect
static bool hdmi_12bpc_possible(struct intel_crtc_state *crtc_state)
{
- struct drm_device *dev = crtc_state->base.crtc->dev;
+ struct drm_i915_private *dev_priv =
+ to_i915(crtc_state->base.crtc->dev);
+ struct drm_atomic_state *state = crtc_state->base.state;
+ struct drm_connector_state *connector_state;
+ struct drm_connector *connector;
+ int i;
- if (HAS_GMCH_DISPLAY(to_i915(dev)))
+ if (HAS_GMCH_DISPLAY(dev_priv))
return false;
/*
* HDMI 12bpc affects the clocks, so it's only possible
* when not cloning with other encoder types.
*/
- return crtc_state->output_types == 1 << INTEL_OUTPUT_HDMI;
+ if (crtc_state->output_types != 1 << INTEL_OUTPUT_HDMI)
+ return false;
+
+ for_each_connector_in_state(state, connector, connector_state, i) {
+ const struct drm_display_info *info = &connector->display_info;
+
+ if (connector_state->crtc != crtc_state->base.crtc)
+ continue;
+
+ if ((info->edid_hdmi_dc_modes & DRM_EDID_HDMI_DC_36) == 0)
+ return false;
+ }
+
+ return true;
}
bool intel_hdmi_compute_config(struct intel_encoder *encoder,
Patches currently in stable-queue which might be from ville.syrjala@xxxxxxxxxxxxxxx are
queue-4.10/drm-i915-reject-hdmi-12bpc-if-the-sink-doesn-t-indicate-support.patch
queue-4.10/drm-i915-nuke-debug-messages-from-the-pipe-update-critical-section.patch
queue-4.10/drm-i915-only-enable-hotplug-interrupts-if-the-display-interrupts-are-enabled.patch
queue-4.10/drm-i915-do-.init_clock_gating-earlier-to-avoid-it-clobbering-watermarks.patch
queue-4.10/drm-i915-gen9-increase-pcode-request-timeout-to-50ms.patch
queue-4.10/drm-i915-avoid-tweaking-evaluation-thresholds-on-baytrail-v3.patch
queue-4.10/drm-i915-move-updating-color-management-to-before-vblank-evasion.patch