[PATCH i-g-t v4 4/6] tests/gem_gpgpu_fill: Add command line switch to dump the surface

[Zbigniew Kempczyński]

When implementation for new platform is added and shader + pipeline
needs to be adopted there's useful to dump the surface data.

0xC4 pattern makes distinction from 0x4C written by the shader very
hard so change it to 0x88 makes dump more clear.

Signed-off-by: Zbigniew Kempczyński <zbigniew.kempczynski at intel.com>
Cc: Dominik Grzegorzek <dominik.grzegorzek at intel.com>
---
 tests/intel/gem_gpgpu_fill.c | 43 +++++++++++++++++++++++++++++++-----
 1 file changed, 38 insertions(+), 5 deletions(-)

diff --git a/tests/intel/gem_gpgpu_fill.c b/tests/intel/gem_gpgpu_fill.c
index aa735e5395..36c60e75f0 100644
--- a/tests/intel/gem_gpgpu_fill.c
+++ b/tests/intel/gem_gpgpu_fill.c
@@ -64,9 +64,11 @@
 #define HEIGHT 64
 #define STRIDE (WIDTH)
 #define SIZE (HEIGHT*STRIDE)
-#define COLOR_C4	0xc4
+#define COLOR_88	0x88
 #define COLOR_4C	0x4c
 
+static bool dump_surface;
+
 typedef struct {
 	int drm_fd;
 	uint32_t devid;
@@ -117,27 +119,58 @@ static void gpgpu_fill(data_t *data, igt_fillfunc_t fill, uint32_t region)
 	uint8_t *ptr;
 	int i, j;
 
-	buf = create_buf(data, WIDTH, HEIGHT, COLOR_C4, region);
+	buf = create_buf(data, WIDTH, HEIGHT, COLOR_88, region);
 	ptr = gem_mmap__device_coherent(data->drm_fd, buf->handle, 0,
 					buf->surface[0].size, PROT_READ);
 
 	for (i = 0; i < WIDTH; i++)
 		for (j = 0; j < HEIGHT; j++)
-			buf_check(ptr, i, j, COLOR_C4);
+			buf_check(ptr, i, j, COLOR_88);
 
 	fill(data->drm_fd, buf, 0, 0, WIDTH / 2, HEIGHT / 2, COLOR_4C);
 
+	if (dump_surface) {
+		for (j = 0; j < HEIGHT; j++) {
+			igt_info("[%04x] ", j);
+			for (i = 0; i < WIDTH; i++) {
+				igt_info("%02x", ptr[j * HEIGHT + i]);
+				if (i % 4 == 3)
+					igt_info(" ");
+			}
+			igt_info("\n");
+		}
+	}
+
 	for (i = 0; i < WIDTH; i++)
 		for (j = 0; j < HEIGHT; j++)
 			if (i < WIDTH / 2 && j < HEIGHT / 2)
 				buf_check(ptr, i, j, COLOR_4C);
 			else
-				buf_check(ptr, i, j, COLOR_C4);
+				buf_check(ptr, i, j, COLOR_88);
 
 	munmap(ptr, buf->surface[0].size);
 }
 
-igt_main
+static int opt_handler(int opt, int opt_index, void *data)
+{
+	switch (opt) {
+	case 'd':
+		dump_surface = true;
+		break;
+	default:
+		return IGT_OPT_HANDLER_ERROR;
+	}
+
+	return IGT_OPT_HANDLER_SUCCESS;
+}
+
+
+const char *help_str =
+	"  -d\tDump surface\n"
+	;
+
+
+igt_main_args("d", NULL, help_str, opt_handler, NULL)
 {
 	data_t data = {0, };
 	igt_fillfunc_t fill_fn = NULL;
-- 
2.34.1