[PATCH v6 16/26] drm/xe/pat: Add helper for compression mode of pat index

[Himal Prasad Ghimiray]

From: Matthew Brost <matthew.brost at intel.com>

Add `xe_pat_index_get_comp_mode()` to extract compression mode from a
PAT index.

Signed-off-by: Matthew Brost <matthew.brost at intel.com>
Signed-off-by: Himal Prasad Ghimiray <himal.prasad.ghimiray at intel.com>
---
 drivers/gpu/drm/xe/xe_pat.c | 10 ++++++++++
 drivers/gpu/drm/xe/xe_pat.h | 10 ++++++++++
 2 files changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/xe/xe_pat.c b/drivers/gpu/drm/xe/xe_pat.c
index 2e7cb99ae87a..ac1767c812aa 100644
--- a/drivers/gpu/drm/xe/xe_pat.c
+++ b/drivers/gpu/drm/xe/xe_pat.c
@@ -154,6 +154,16 @@ static const struct xe_pat_table_entry xe2_pat_table[] = {
 static const struct xe_pat_table_entry xe2_pat_ats = XE2_PAT( 0, 0, 0, 0, 3, 3 );
 static const struct xe_pat_table_entry xe2_pat_pta = XE2_PAT( 0, 0, 0, 0, 3, 0 );
 
+bool xe_pat_index_get_comp_mode(struct xe_device *xe, u16 pat_index)
+{
+	WARN_ON(pat_index >= xe->pat.n_entries);
+
+	if (xe->pat.table != xe2_pat_table)
+		return false;
+
+	return xe->pat.table[pat_index].value & XE2_COMP_EN;
+}
+
 u16 xe_pat_index_get_coh_mode(struct xe_device *xe, u16 pat_index)
 {
 	WARN_ON(pat_index >= xe->pat.n_entries);
diff --git a/drivers/gpu/drm/xe/xe_pat.h b/drivers/gpu/drm/xe/xe_pat.h
index fa0dfbe525cd..8be2856a73af 100644
--- a/drivers/gpu/drm/xe/xe_pat.h
+++ b/drivers/gpu/drm/xe/xe_pat.h
@@ -58,4 +58,14 @@ 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_get_comp_mode() = Extract the compression mode for the given
+ * pat_index.
+ * @xe: xe device
+ * @pat_index: The pat_index to query
+ *
+ * Return: True if pat_index is compressed, False otherwise
+ */
+bool xe_pat_index_get_comp_mode(struct xe_device *xe, u16 pat_index);
+
 #endif
-- 
2.34.1