From 77a494a7250ce082def81a5fa67c24789ecabe0b Mon Sep 17 00:00:00 2001
From: Puthikorn Voravootivat <puthik@chromium.org>
Date: Tue, 23 May 2017 15:38:04 -0700
Subject: [PATCH] drm: Add definition for eDP backlight frequency
Git-commit: 77a494a7250ce082def81a5fa67c24789ecabe0b
Patch-mainline: v4.13-rc1
References: FATE#322643 bsc#1055900
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: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-by: Dhinakaran Pandiyan <dhinakaran.pandiyan@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20170523223805.46372-5-puthik@chromium.org
Acked-by: Takashi Iwai <tiwai@suse.de>
---
include/drm/drm_dp_helper.h | 2 ++
1 file changed, 2 insertions(+)
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -679,10 +679,12 @@
#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