Commit b395c29a authored by Ville Syrjälä's avatar Ville Syrjälä
Browse files

drm/i915: Read DRRS MSA timing delay from VBT 



VBT hsa a field for the MSA timing delay, which supposedly
should be used with DRRS. Extract the data from the VBT.

Signed-off-by: default avatarVille Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220310004802.16310-5-ville.syrjala@linux.intel.com


Reviewed-by: default avatarJani Nikula <jani.nikula@intel.com>
parent 5f6a9bea

drivers/gpu/drm/i915/display/intel_bios.c

+3 −0
Original line number Diff line number Diff line
@@ -888,6 +888,9 @@ parse_edp(struct drm_i915_private *i915, const struct bdb_header *bdb) 
			i915->vbt.edp.low_vswing = vswing == 0;

		}

	}



	i915->vbt.edp.drrs_msa_timing_delay =

		(edp->sdrrs_msa_timing_delay >> (panel_type * 2)) & 3;

}



static void

drivers/gpu/drm/i915/i915_drv.h

+3 −2
Original line number Diff line number Diff line
@@ -356,10 +356,11 @@ struct intel_vbt_data { 
		int lanes;

		int preemphasis;

		int vswing;

		bool low_vswing;

		bool initialized;

		int bpp;

		struct edp_power_seq pps;

		u8 drrs_msa_timing_delay;

		bool low_vswing;

		bool initialized;

		bool hobl;

	} edp;