Re: [Intel-gfx] [PATCH v2 1/2] drm/i915/backlight: setup and cache pwm alternate increment value

On Mon, 19 Sep 2016, "Lee, Shawn C" wrote: > PWM was enabled in bios. i915 driver will save max duty to > panel->backlight.max. > So *_hz_to_pwm will not be called if backlight.max not zero. And what difference does it make? BR, Jani. > > pch_ctl2 =

Re: [Intel-gfx] [PATCH v2 1/2] drm/i915/backlight: setup and cache pwm alternate increment value

PWM was enabled in bios. i915 driver will save max duty to panel->backlight.max. So *_hz_to_pwm will not be called if backlight.max not zero. pch_ctl2 = I915_READ(BLC_PWM_PCH_CTL2); panel->backlight.max = pch_ctl2 >> 16; if (!panel->backlight.max)

[Intel-gfx] [PATCH v2 1/2] drm/i915/backlight: setup and cache pwm alternate increment value

This will also be needed later on when setting up the alternate increment in backlight enable. Cc: Shawn Lee Signed-off-by: Jani Nikula --- drivers/gpu/drm/i915/intel_drv.h | 1 + drivers/gpu/drm/i915/intel_panel.c | 14 +++--- 2 files