drm/i915/bios: Define the (obsolete) backlight i2c VBT stuff

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@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240321161806.31714-5-ville.syrjala@linux.intel.com
Reviewed-by: Jani Nikula <jani.nikula@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_vbt_defs.h b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
index 5da8ae407dfda6ff51c09bdb127dcf9775b35302..bcd1b239eb65d72042dfbb12478d5b7aa23ee433 100644 (file)
--- 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 {