drm/i915/bios: Add the old DPST field into VBT LFP power block

According to some VBIOS sources the LFP power block used to
have a single bit for DPST support. In version 159 that bit
got moved into the driver features block, and then in version
228 back into the LFP power block (but this time as a
per-panel thing). We have definitions for the last two, but
not the original bit. Define it as well.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240321161806.31714-4-ville.syrjala@linux.intel.com
Acked-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 24583b455f2d423f1ce119de1125be9027e767e9..5da8ae407dfda6ff51c09bdb127dcf9775b35302 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_vbt_defs.h
+++ b/drivers/gpu/drm/i915/display/intel_vbt_defs.h
@@ -918,7 +918,7 @@ struct bdb_lfp_backlight_data {
  * Block 44 - LFP Power Conservation Features Block
  */
 struct lfp_power_features {
-       u8 reserved1:1;
+       u8 dpst_support:1;                                              /* ???-159 */
        u8 power_conservation_pref:3;
        u8 reserved2:1;
        u8 lace_enabled_status:1;                                       /* 210+ */