[Intel-xe] [PATCH 3/3] drm/xe: Add helper to get dss per group

[Lucas De Marchi]

This is already used in intel_gt_mcr and will be used in workarounds.
Add helpers so the platform-dependency is in a single place.

Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 drivers/gpu/drm/xe/xe_gt_mcr.c      | 2 +-
 drivers/gpu/drm/xe/xe_gt_topology.c | 6 ++++++
 drivers/gpu/drm/xe/xe_gt_topology.h | 3 +++
 3 files changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_gt_mcr.c b/drivers/gpu/drm/xe/xe_gt_mcr.c
index 10eff02cc7db..fdbf9edb14cd 100644
--- a/drivers/gpu/drm/xe/xe_gt_mcr.c
+++ b/drivers/gpu/drm/xe/xe_gt_mcr.c
@@ -217,7 +217,7 @@ static void init_steering_dss(struct xe_gt *gt)
 {
 	unsigned int dss = min(xe_dss_mask_group_ffs(gt->fuse_topo.g_dss_mask, 0, 0),
 			       xe_dss_mask_group_ffs(gt->fuse_topo.c_dss_mask, 0, 0));
-	unsigned int dss_per_grp = gt_to_xe(gt)->info.platform == XE_PVC ? 8 : 4;
+	unsigned int dss_per_grp = xe_gt_topology_get_dss_per_group(gt);
 
 	gt->steering[DSS].group_target = dss / dss_per_grp;
 	gt->steering[DSS].instance_target = dss % dss_per_grp;
diff --git a/drivers/gpu/drm/xe/xe_gt_topology.c b/drivers/gpu/drm/xe/xe_gt_topology.c
index 967f2349c67a..9fe06a46a400 100644
--- a/drivers/gpu/drm/xe/xe_gt_topology.c
+++ b/drivers/gpu/drm/xe/xe_gt_topology.c
@@ -103,6 +103,12 @@ xe_gt_topology_dump(struct xe_gt *gt, struct drm_printer *p)
 
 }
 
+unsigned int
+xe_gt_topology_get_dss_per_group(struct xe_gt *gt)
+{
+	return gt_to_xe(gt)->info.platform == XE_PVC ? 8 : 4;
+}
+
 /*
  * Used to obtain the index of the first DSS.  Can start searching from the
  * beginning of a specific dss group (e.g., gslice, cslice, etc.) if
diff --git a/drivers/gpu/drm/xe/xe_gt_topology.h b/drivers/gpu/drm/xe/xe_gt_topology.h
index 2375f005e0c8..cf8f75a4c7dd 100644
--- a/drivers/gpu/drm/xe/xe_gt_topology.h
+++ b/drivers/gpu/drm/xe/xe_gt_topology.h
@@ -14,6 +14,9 @@ void xe_gt_topology_init(struct xe_gt *gt);
 
 void xe_gt_topology_dump(struct xe_gt *gt, struct drm_printer *p);
 
+unsigned int
+xe_gt_topology_get_dss_per_group(struct xe_gt *gt);
+
 unsigned int
 xe_dss_mask_group_ffs(const xe_dss_mask_t mask, int groupsize, int groupnum);
 
-- 
2.39.0