From 9a41e17de38e8528816598e728f784da68df17f7 Mon Sep 17 00:00:00 2001 From: Deepak M Date: Tue, 26 Apr 2016 16:14:24 +0300 Subject: drm/i915: Parse LFP brightness control field in VBT These fields in VBT indicates the PWM source which is used and also the controller number. v2 by Jani: check for out of bounds access, some renames, change default type, etc. v3 by Jani: s/INTEL_BACKLIGHT_CABC/INTEL_BACKLIGHT_DSI_DCS/ Signed-off-by: Deepak M Signed-off-by: Jani Nikula Link: http://patchwork.freedesktop.org/patch/msgid/eee2f7b683a081f006a7df1ddad9b20fbf53c48c.1461676337.git.jani.nikula@intel.com --- drivers/gpu/drm/i915/intel_bios.c | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/gpu/drm/i915/intel_bios.c') diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c index dbbd59171722..81518116e00d 100644 --- a/drivers/gpu/drm/i915/intel_bios.c +++ b/drivers/gpu/drm/i915/intel_bios.c @@ -318,6 +318,15 @@ parse_lfp_backlight(struct drm_i915_private *dev_priv, return; } + dev_priv->vbt.backlight.type = INTEL_BACKLIGHT_DISPLAY_DDI; + if (bdb->version >= 191 && + get_blocksize(backlight_data) >= sizeof(*backlight_data)) { + const struct bdb_lfp_backlight_control_method *method; + + method = &backlight_data->backlight_control[panel_type]; + dev_priv->vbt.backlight.type = method->type; + } + dev_priv->vbt.backlight.pwm_freq_hz = entry->pwm_freq_hz; dev_priv->vbt.backlight.active_low_pwm = entry->active_low_pwm; dev_priv->vbt.backlight.min_brightness = entry->min_brightness; -- cgit v1.2.3-59-g8ed1b