[Intel-gfx] [PATCH 04/13] drm/i915: Read DRRS MSA timing delay from VBT

[Ville Syrjala <ville.syrjala@linux.intel.com>]

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

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: Ville Syrjälä <ville.syrjala@linux.intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c | 3 +++
 drivers/gpu/drm/i915/i915_drv.h           | 5 +++--
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c b/drivers/gpu/drm/i915/display/intel_bios.c
index a559a1914588..93dc32fb3e40 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -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
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index 943267393ecb..020c5f7602a2 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -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;
 
-- 
2.34.1