[PATCH 1/4] drm/xe/pat: annotate pat index table with compression info

[Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>]

From: Matthew Auld <matthew.auld@intel.com>

In a future patch we need to be able to determine if a given pat_index
enables compression on xe2. Simplest is to annotate the PAT index table
with this information.

Signed-off-by: Matthew Auld <matthew.auld@intel.com>
Reviewed-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Signed-off-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
---
 drivers/gpu/drm/xe/xe_pat.c |  9 ++++++++-
 drivers/gpu/drm/xe/xe_pat.h | 14 ++++++++++++++
 2 files changed, 22 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c
index 1ff6bc79e7d4..c3cc6e90b068 100644
--- a/drivers/gpu/drm/xe/xe_pat.c
+++ b/drivers/gpu/drm/xe/xe_pat.c
@@ -104,7 +104,8 @@ static const struct xe_pat_table_entry xelpg_pat_table[] = {
 			REG_FIELD_PREP(XE2_L3_POLICY, l3_policy) | \
 			REG_FIELD_PREP(XE2_L4_POLICY, l4_policy) | \
 			REG_FIELD_PREP(XE2_COH_MODE, __coh_mode), \
-		.coh_mode = __coh_mode ? XE_COH_AT_LEAST_1WAY : XE_COH_NONE \
+		.coh_mode = __coh_mode ? XE_COH_AT_LEAST_1WAY : XE_COH_NONE, \
+		.compressed = comp_en \
 	}
 
 static const struct xe_pat_table_entry xe2_pat_table[] = {
@@ -148,6 +149,12 @@ u16 xe_pat_index_get_coh_mode(struct xe_device *xe, u16 pat_index)
 	return xe->pat.table[pat_index].coh_mode;
 }
 
+bool xe_pat_index_has_compression(struct xe_device *xe, u16 pat_index)
+{
+	WARN_ON(pat_index >= xe->pat.n_entries);
+	return xe->pat.table[pat_index].compressed;
+}
+
 static void program_pat(struct xe_gt *gt, const struct xe_pat_table_entry table[],
 			int n_entries)
 {
diff --git a/drivers/gpu/drm/xe/xe_pat.h b/drivers/gpu/drm/xe/xe_pat.h
index fa0dfbe525cd..8c0fc68e844f 100644
--- a/drivers/gpu/drm/xe/xe_pat.h
+++ b/drivers/gpu/drm/xe/xe_pat.h
@@ -29,6 +29,10 @@ struct xe_pat_table_entry {
 #define XE_COH_NONE          1
 #define XE_COH_AT_LEAST_1WAY 2
 	u16 coh_mode;
+	/**
+	 * @compressed: Whether compression is enabled or not with @value.
+	 */
+	bool compressed;
 };
 
 /**
@@ -58,4 +62,14 @@ void xe_pat_dump(struct xe_gt *gt, struct drm_printer *p);
  */
 u16 xe_pat_index_get_coh_mode(struct xe_device *xe, u16 pat_index);
 
+/**
+ * xe_pat_index_has_compression - Check if the given pat_index enables
+ * compression.
+ * @xe: xe device
+ * @pat_index: The pat_index to query
+ *
+ * Note: Only applicable to xe2+, where compression is part of the PAT index.
+ */
+bool xe_pat_index_has_compression(struct xe_device *xe, u16 pat_index);
+
 #endif
-- 
2.25.1