Patch "drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel" has been added to the 4.9-stable tree

Patch "drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel" has been added to the 4.9-stable tree

[gregkh]

This is a note to let you know that I've just added the patch titled

    drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel

to the 4.9-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-parse-ddi-ports-also-for-chv-for-hdmi-ddc-pin-and-dp-aux-channel.patch
and it can be found in the queue-4.9 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From ea850f64c2722278f150dc11de2141baeb24211c Mon Sep 17 00:00:00 2001
From: Jani Nikula <jani.nikula@intel.com>
Date: Thu, 28 Sep 2017 11:21:57 +0300
Subject: drm/i915/bios: parse DDI ports also for CHV for HDMI DDC pin and DP AUX channel
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

From: Jani Nikula <jani.nikula@intel.com>

commit ea850f64c2722278f150dc11de2141baeb24211c upstream.

While technically CHV isn't DDI, we do look at the VBT based DDI port
info for HDMI DDC pin and DP AUX channel. (We call these "alternate",
but they're really just something that aren't platform defaults.)

In commit e4ab73a13291 ("drm/i915: Respect alternate_ddc_pin for all DDI
ports") Ville writes, "IIRC there may be CHV system that might actually
need this."

I'm not sure why there couldn't be even more platforms that need this,
but start conservative, and parse the info for CHV in addition to DDI.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=100553
Reported-by: Marek Wilczewski <mw@3cte.pl>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/d0815082cb98487618429b62414854137049b888.1506586821.git.jani.nikula@intel.com
(cherry picked from commit 348e4058ebf53904e817eec7a1b25327143c2ed2)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/i915/intel_bios.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -1219,7 +1219,7 @@ static void parse_ddi_ports(struct drm_i
 {
 	enum port port;
 
-	if (!HAS_DDI(dev_priv))
+	if (!HAS_DDI(dev_priv) && !IS_CHERRYVIEW(dev_priv))
 		return;
 
 	if (!dev_priv->vbt.child_dev_num)


Patches currently in stable-queue which might be from jani.nikula@intel.com are

queue-4.9/drm-i915-bios-parse-ddi-ports-also-for-chv-for-hdmi-ddc-pin-and-dp-aux-channel.patch
queue-4.9/drm-i915-edp-get-the-panel-power-off-timestamp-after-panel-is-off.patch