From 7b3f881e41c5d38329a934269679e40f88b22604 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Fri, 8 Dec 2017 23:37:36 +0200 Subject: [PATCH] drm/i915: Disable DC states around GMBUS on GLK MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit commit 156961ae7bdf6feb72778e8da83d321b273343fd upstream. Prevent the DMC from destroying GMBUS transfers on GLK. GMBUS lives in PG1 so DC off is all we need. Cc: stable@vger.kernel.org Signed-off-by: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20171208213739.16388-1-ville.syrjala@linux.intel.com Reviewed-by: Dhinakaran Pandiyan Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_runtime_pm.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 51cb5293bf43..bcccacba1ec6 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -1844,6 +1844,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv, CNL_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)) static const struct i915_power_well_ops i9xx_always_on_power_well_ops = { -- 2.20.1