[Intel-gfx] [PATCH 1/1] drm/i915: Handle the DG2 max bw properly

[Vinod Govindapillai]

Separate the max bw call for DG2 as it has a constant bandwidth
regardless of the number of planes enabled.

cc: Ville Syrjälä <ville.syrjala at linux.intel.com>
cc: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>

Signed-off-by: Vinod Govindapillai <vinod.govindapillai at intel.com>
---
 drivers/gpu/drm/i915/display/intel_bw.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index 395e48930b08..f1e1feb8db06 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -538,6 +538,13 @@ static unsigned int tgl_max_bw(struct drm_i915_private *dev_priv,
 	return dev_priv->max_bw[0].deratedbw[qgv_point];
 }
 
+static unsigned int dg2_max_bw(struct drm_i915_private *i915)
+{
+	struct intel_bw_info *bi = &i915->max_bw[0];
+
+	return bi->deratedbw[0];
+}
+
 static unsigned int adl_psf_bw(struct drm_i915_private *dev_priv,
 			       int psf_gv_point)
 {
@@ -931,7 +938,9 @@ int intel_bw_atomic_check(struct intel_atomic_state *state)
 	for (i = 0; i < num_qgv_points; i++) {
 		unsigned int max_data_rate;
 
-		if (DISPLAY_VER(dev_priv) > 11)
+		if (IS_DG2(dev_priv))
+			max_data_rate = dg2_max_bw(dev_priv);
+		else if (DISPLAY_VER(dev_priv) > 11)
 			max_data_rate = tgl_max_bw(dev_priv, num_active_planes, i);
 		else
 			max_data_rate = icl_max_bw(dev_priv, num_active_planes, i);
-- 
2.25.1