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drm/i915: extract backlight minimum brightness from VBT 

Reviewed-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Jani Nikula 2014-06-24 18:27:39 +03:00 committed by Daniel Vetter
parent b98856a86b
commit 1de6068eb7
2 changed files with 3 additions and 1 deletions
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1
drivers/gpu/drm/i915/i915_drv.h
View File

@ -1270,6 +1270,7 @@ struct intel_vbt_data {
u16 pwm_freq_hz;
bool present;
bool active_low_pwm;
u8 min_brightness; /* min_brightness/255 of max */
} backlight;
/* MIPI DSI */

3
drivers/gpu/drm/i915/intel_bios.c
View File

@ -336,11 +336,12 @@ parse_lfp_backlight(struct drm_i915_private *dev_priv, struct bdb_header *bdb)
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;
DRM_DEBUG_KMS("VBT backlight PWM modulation frequency %u Hz, "
"active %s, min brightness %u, level %u\n",
dev_priv->vbt.backlight.pwm_freq_hz,
dev_priv->vbt.backlight.active_low_pwm ? "low" : "high",
entry->min_brightness,
dev_priv->vbt.backlight.min_brightness,
backlight_data->level[panel_type]);
}