[Intel-gfx] [PATCH v2 1/1] drm/i915: Handle the DG2 max bw properly

[Vinod Govindapillai]

DG2 has a constant bandwidth regardless of the number of planes
enabled. Handle the DG2 bw separately.

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 | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bw.c b/drivers/gpu/drm/i915/display/intel_bw.c
index ac11ff19e47d..8955f9f8476a 100644
--- a/drivers/gpu/drm/i915/display/intel_bw.c
+++ b/drivers/gpu/drm/i915/display/intel_bw.c
@@ -1003,7 +1003,9 @@ 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 = dev_priv->max_bw[0].deratedbw[0];
+		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