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drm/i915: Disable DC states around GMBUS on GLK

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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.syrjala@linux.intel.com
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>
This commit is contained in:
Ville Syrjälä 2017-12-08 23:37:36 +02:00 committed by Greg Kroah-Hartman
parent d4f9aaeb26
commit 5d8c39173b
1 changed files with 1 additions and 0 deletions
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1
drivers/gpu/drm/i915/intel_runtime_pm.c
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@ -1786,6 +1786,7 @@ void intel_display_power_put(struct drm_i915_private *dev_priv,
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 ( \