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drm/i915: Disable DC states around GMBUS on GLK
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Fri, 8 Dec 2017 21:37:36 +0000 (23:37 +0200)
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Thu, 15 Mar 2018 09:54:28 +0000 (10:54 +0100)
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 <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20171208213739.16388-1-ville.syrjala@linux.intel.com
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
drivers/gpu/drm/i915/intel_runtime_pm.c patch | blob | blame | history

diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c
index 51cb5293bf43a64f6fad68303313ceec25b152c6..bcccacba1ec68d00faff67f3fc3c41de3ed06a25 100644 (file)
--- 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 = {