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

drm/i915: Disable DC states around GMBUS on GLK

to the 4.14-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git%3Ba=su...

The filename of the patch is: drm-i915-disable-dc-states-around-gmbus-on-glk.patch and it can be found in the queue-4.14 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 3488d0237f6364614f0c59d6d784bb79b11eeb92 Mon Sep 17 00:00:00 2001

From: =?UTF-8?q?Ville=20Syrj=C3=A4l=C3=A4?= ville.syrjala@linux.intel.com Date: Fri, 8 Dec 2017 23:37:36 +0200 Subject: drm/i915: Disable DC states around GMBUS on GLK MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit

From: Ville Syrjälä ville.syrjala@linux.intel.com

commit 3488d0237f6364614f0c59d6d784bb79b11eeb92 upstream.

Prevent the DMC from destroying GMBUS transfers on GLK. GMBUS lives in PG1 so DC off is all we need.

Signed-off-by: Ville Syrjälä ville.syrjala@linux.intel.com Link: https://patchwork.freedesktop.org/patch/msgid/20171208213739.16388-1-ville.s... Reviewed-by: Dhinakaran Pandiyan dhinakaran.pandiyan@intel.com (cherry picked from commit 156961ae7bdf6feb72778e8da83d321b273343fd) Signed-off-by: Jani Nikula jani.nikula@intel.com Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org

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

--- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -1786,6 +1786,7 @@ void intel_display_power_put(struct drm_ GLK_DISPLAY_POWERWELL_2_POWER_DOMAINS | \ BIT_ULL(POWER_DOMAIN_MODESET) | \ BIT_ULL(POWER_DOMAIN_AUX_A) | \ + BIT_ULL(POWER_DOMAIN_GMBUS) | \ BIT_ULL(POWER_DOMAIN_INIT))

#define CNL_DISPLAY_POWERWELL_2_POWER_DOMAINS ( \

Patches currently in stable-queue which might be from ville.syrjala@linux.intel.com are

queue-4.14/drm-i915-apply-display-wa-1183-on-skl-kbl-and-cfl.patch queue-4.14/drm-i915-disable-dc-states-around-gmbus-on-glk.patch