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drm/i915: spt does not have pch backlight override bit 

SPT is always in the PCH override mode, and the bit MBZ. Only set
override on LPT.

v2: check for PCH version (Ville)

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
hifive-unleashed-5.1
Jani Nikula 2014-10-10 17:53:33 +03:00 committed by Daniel Vetter
parent d9ceb81633
commit e6b2627c6a
1 changed files with 3 additions and 2 deletions
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5
drivers/gpu/drm/i915/intel_panel.c
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@ -775,8 +775,9 @@ static void bdw_enable_backlight(struct intel_connector *connector)
if (panel->backlight.active_low_pwm)
pch_ctl1 |= BLM_PCH_POLARITY;
/* BDW always uses the pch pwm controls. */
pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
/* After LPT, override is the default. */
if (HAS_PCH_LPT(dev_priv))
pch_ctl1 |= BLM_PCH_OVERRIDE_ENABLE;
I915_WRITE(BLC_PWM_PCH_CTL1, pch_ctl1);
POSTING_READ(BLC_PWM_PCH_CTL1);