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authorPuthikorn Voravootivat <puthik@chromium.org>2017-05-23 15:38:04 -0700
committerJani Nikula <jani.nikula@intel.com>2017-05-26 15:20:51 +0300
commit77a494a7250ce082def81a5fa67c24789ecabe0b (patch)
tree4c9ad7ec657f0b8303eea958fcc8a866375d7c80 /include/drm/drm_dp_helper.h
parent49d191dd5d41ca3a6b447075d50ce5f287171f71 (diff)
downloadop-kernel-dev-77a494a7250ce082def81a5fa67c24789ecabe0b.zip
op-kernel-dev-77a494a7250ce082def81a5fa67c24789ecabe0b.tar.gz
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: 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
Diffstat (limited to 'include/drm/drm_dp_helper.h')
-rw-r--r--include/drm/drm_dp_helper.h2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index c0bd0d7..23837f5 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -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
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