[igt-dev] [PATCH i-g-t v3 3/6] lib/intel_pat: Add uc_comp pat_index

[Akshata Jahagirdar]

Compression in XE2 is programmed through pat-index attribute.
Add a dedicated pat-index for compression for XE2 and later platforms.
The caller to this helper function ensures GFX version is correct.

Signed-off-by: Akshata Jahagirdar <akshata.jahagirdar at intel.com>
---
 lib/intel_pat.c | 14 +++++++++++++-
 lib/intel_pat.h |  2 ++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/lib/intel_pat.c b/lib/intel_pat.c
index 2b892ee52..8ec8b72a8 100644
--- a/lib/intel_pat.c
+++ b/lib/intel_pat.c
@@ -11,7 +11,7 @@ struct intel_pat_cache {
 	uint8_t uc; /* UC + COH_NONE */
 	uint8_t wt; /* WT + COH_NONE */
 	uint8_t wb; /* WB + COH_AT_LEAST_1WAY */
-
+	uint8_t uc_comp; /* UC + COH_NONE + COMPRESSION, XE2 and later*/
 	uint8_t max_index;
 };
 
@@ -23,6 +23,7 @@ static void intel_get_pat_idx(int fd, struct intel_pat_cache *pat)
 		pat->uc = 3;
 		pat->wt = 15; /* Compressed + WB-transient */
 		pat->wb = 2;
+		pat->uc_comp = 12; /* Compressed + UC, XE2 and later */
 		pat->max_index = 31;
 	} else if (IS_METEORLAKE(dev_id)) {
 		pat->uc = 2;
@@ -60,6 +61,17 @@ uint8_t intel_get_pat_idx_uc(int fd)
 	return pat.uc;
 }
 
+uint8_t intel_get_pat_idx_uc_comp(int fd)
+{
+	struct intel_pat_cache pat = {};
+
+	uint16_t dev_id = intel_get_drm_devid(fd);
+	igt_assert(AT_LEAST_GEN(dev_id, 20));
+
+	intel_get_pat_idx(fd, &pat);
+	return pat.uc_comp;
+}
+
 uint8_t intel_get_pat_idx_wt(int fd)
 {
 	struct intel_pat_cache pat = {};
diff --git a/lib/intel_pat.h b/lib/intel_pat.h
index c24dbc275..eb48cbc65 100644
--- a/lib/intel_pat.h
+++ b/lib/intel_pat.h
@@ -16,4 +16,6 @@ uint8_t intel_get_pat_idx_uc(int fd);
 uint8_t intel_get_pat_idx_wt(int fd);
 uint8_t intel_get_pat_idx_wb(int fd);
 
+uint8_t intel_get_pat_idx_uc_comp(int fd);
+
 #endif /* INTEL_PAT_H */
-- 
2.34.1