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>

2 files changed, 3 insertions, 1 deletions

diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 30b23bf7df28..12ab3201ee1e 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -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 */
diff --git a/drivers/gpu/drm/i915/intel_bios.c b/drivers/gpu/drm/i915/intel_bios.c
index 827498e081df..608ed302f24d 100644
--- a/drivers/gpu/drm/i915/intel_bios.c
+++ b/drivers/gpu/drm/i915/intel_bios.c
@@ -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]);
 }