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Commit 77a494a7 authored by Puthikorn Voravootivat's avatar Puthikorn Voravootivat Committed by Jani Nikula
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drm: Add definition for eDP backlight frequency 



This patch adds the following definition
- Bit mask for EDP_PWMGEN_BIT_COUNT and min/max cap
  register which only use bit 0:4
- Base frequency (27 MHz) for backlight PWM frequency
  generator.

Signed-off-by: default avatarPuthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: default avatarDhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Acked-by: default avatarDave Airlie <airlied@gmail.com>
Signed-off-by: default avatarJani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170523223805.46372-5-puthik@chromium.org
parent 49d191dd

include/drm/drm_dp_helper.h

+2 −0
Original line number Diff line number Diff line
@@ -572,10 +572,12 @@ 
#define DP_EDP_PWMGEN_BIT_COUNT             0x724

#define DP_EDP_PWMGEN_BIT_COUNT_CAP_MIN     0x725

#define DP_EDP_PWMGEN_BIT_COUNT_CAP_MAX     0x726

# define DP_EDP_PWMGEN_BIT_COUNT_MASK       (0x1f << 0)



#define DP_EDP_BACKLIGHT_CONTROL_STATUS     0x727



#define DP_EDP_BACKLIGHT_FREQ_SET           0x728

# define DP_EDP_BACKLIGHT_FREQ_BASE_KHZ     27000



#define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_MSB   0x72a

#define DP_EDP_BACKLIGHT_FREQ_CAP_MIN_MID   0x72b