[PATCH i-g-t v2 2/2] tests/gem|xe_ccs: Check surface ccs data instead of naive comparison

["Zbigniew Kempczyński" <zbigniew.kempczynski@intel.com>]

Start using function which extracts ccs data from the surface and
determines its compression.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski@intel.com>
Cc: Karolina Stolarek <karolina.stolarek@intel.com>
Cc: Akshata Jahagirdar <akshata.jahagirdar@intel.com>
---
v2: rephrase comment (Karolina)
---
 tests/intel/gem_ccs.c | 16 +++++++++++++---
 tests/intel/xe_ccs.c  | 14 ++++++--------
 2 files changed, 19 insertions(+), 11 deletions(-)

diff --git a/tests/intel/gem_ccs.c b/tests/intel/gem_ccs.c
index e4126bcaa8..a8e7e8a747 100644
--- a/tests/intel/gem_ccs.c
+++ b/tests/intel/gem_ccs.c
@@ -305,6 +305,10 @@ static int blt_block_copy3(int i915,
 	return ret;
 }
 
+#define CHECK_FROM_WIDTH 256
+#define CHECK_FROM_HEIGHT 256
+#define FROM_EXP_WH(w, h) ((w) >= CHECK_FROM_WIDTH && (h) >= CHECK_FROM_HEIGHT)
+
 static void block_copy(int i915,
 		       const intel_ctx_t *ctx,
 		       const struct intel_execution_engine2 *e,
@@ -359,9 +363,15 @@ static void block_copy(int i915,
 	blt_block_copy(i915, ctx, e, ahnd, &blt, pext);
 	gem_sync(i915, mid->handle);
 
-	/* We expect mid != src if there's compression */
-	if (mid->compression)
-		igt_assert(memcmp(src->ptr, mid->ptr, src->size) != 0);
+	/*
+	 * If there's a compression we expect ctrl surface is not fully zeroed.
+	 * Gradient image used as the reference may be not compressible for
+	 * smaller sizes. Let's use some 'safe' size we're sure compression
+	 * occurs and ctrl surface will be filled with some not-zeroed values.
+	 */
+	if (mid->compression && FROM_EXP_WH(width, height))
+		igt_assert(blt_surface_is_compressed(i915, (intel_ctx_t *)ctx, e,
+						     ahnd, mid));
 
 	WRITE_PNG(i915, run_id, "mid", &blt.dst, width, height, bpp);
 
diff --git a/tests/intel/xe_ccs.c b/tests/intel/xe_ccs.c
index 7d0f2f2a11..b3bf97af7e 100644
--- a/tests/intel/xe_ccs.c
+++ b/tests/intel/xe_ccs.c
@@ -359,15 +359,13 @@ static void block_copy(int xe,
 	intel_ctx_xe_sync(ctx, true);
 
 	/*
-	 * We expect mid != src if there's compression. Ignore this for small
-	 * width x height for linear as compression for gradient occurs in the
-	 * middle for bigger sizes. We also ignore 1x1 as this looks same for
-	 * xmajor.
+	 * If there's a compression we expect ctrl surface is not fully zeroed.
+	 * Gradient image used as the reference may be not compressible for
+	 * smaller sizes. Let's use some 'safe' size we're sure compression
+	 * occurs and ctrl surface will be filled with some not-zeroed values.
 	 */
-	if (mid->compression && MIN_EXP_WH(width, height)) {
-		if (mid_tiling != T_LINEAR || FROM_EXP_WH(width, height))
-			igt_assert(memcmp(src->ptr, mid->ptr, src->size) != 0);
-	}
+	if (mid->compression && FROM_EXP_WH(width, height))
+		igt_assert(blt_surface_is_compressed(xe, ctx, NULL, ahnd, mid));
 
 	WRITE_PNG(xe, run_id, "mid", &blt.dst, width, height, bpp);
 
-- 
2.34.1