[PATCH 4/5] drm/i915/bios: Define the (obsolete) backlight i2c VBT stuff

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

The VBT backlight entries include various fields for i2c
controlled backlights. These have been obsoleted at some
unknown point in time, but let's define them anyway so that
we have a full picture of what has been in there.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_vbt_defs.h | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index 5da8ae407dfd..bcd1b239eb65 100644
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -881,11 +881,12 @@ struct bdb_lvds_lfp_data_tail {
 struct lfp_backlight_data_entry {
 	u8 type:2;
 	u8 active_low_pwm:1;
-	u8 obsolete1:5;
+	u8 i2c_pin:3;						/* obsolete since ? */
+	u8 i2c_speed:2;						/* obsolete since ? */
 	u16 pwm_freq_hz;
 	u8 min_brightness;					/* ???-233 */
-	u8 obsolete2;
-	u8 obsolete3;
+	u8 i2c_address;						/* obsolete since ? */
+	u8 i2c_command;						/* obsolete since ? */
 } __packed;
 
 struct lfp_backlight_control_method {
-- 
2.43.2