drm/format-helper: Support multiple target formats results

In order to support multiple destination format conversions, store the
destination pitch and the expected result in its own structure.

Tested-by: Tales L. Aparecida <tales.aparecida@gmail.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220726230916.390575-4-jose.exposito89@gmail.com

drivers/gpu/drm/tests/drm_format_helper_test.c

@@ -16,35 +16,43 @@
 
 #define TEST_BUF_SIZE 50
 
+struct convert_to_rgb332_result {
+	unsigned int dst_pitch;
+	const u8 expected[TEST_BUF_SIZE];
+};
+
 struct convert_xrgb8888_case {
 	const char *name;
 	unsigned int pitch;
-	unsigned int dst_pitch;
 	struct drm_rect clip;
 	const u32 xrgb8888[TEST_BUF_SIZE];
-	const u8 expected[4 * TEST_BUF_SIZE];
+	struct convert_to_rgb332_result rgb332_result;
 };
 
 static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
 	{
 		.name = "single_pixel_source_buffer",
 		.pitch = 1 * 4,
-		.dst_pitch = 0,
 		.clip = DRM_RECT_INIT(0, 0, 1, 1),
 		.xrgb8888 = { 0x01FF0000 },
+		.rgb332_result = {
+			.dst_pitch = 0,
 			.expected = { 0xE0 },
 		},
+	},
 	{
 		.name = "single_pixel_clip_rectangle",
 		.pitch = 2 * 4,
-		.dst_pitch = 0,
 		.clip = DRM_RECT_INIT(1, 1, 1, 1),
 		.xrgb8888 = {
 			0x00000000, 0x00000000,
 			0x00000000, 0x10FF0000,
 		},
+		.rgb332_result = {
+			.dst_pitch = 0,
 			.expected = { 0xE0 },
 		},
+	},
 	{
 		/* Well known colors: White, black, red, green, blue, magenta,
 		 * yellow and cyan. Different values for the X in XRGB8888 to
@@ -52,7 +60,6 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
 		 */
 		.name = "well_known_colors",
 		.pitch = 4 * 4,
-		.dst_pitch = 0,
 		.clip = DRM_RECT_INIT(1, 1, 2, 4),
 		.xrgb8888 = {
 			0x00000000, 0x00000000, 0x00000000, 0x00000000,
@@ -61,6 +68,8 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
 			0x00000000, 0x550000FF, 0x66FF00FF, 0x00000000,
 			0x00000000, 0x77FFFF00, 0x8800FFFF, 0x00000000,
 		},
+		.rgb332_result = {
+			.dst_pitch = 0,
 			.expected = {
 				0xFF, 0x00,
 				0xE0, 0x1C,
@@ -68,23 +77,26 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
 				0xFC, 0x1F,
 			},
 		},
+	},
 	{
 		/* Randomly picked colors. Full buffer within the clip area. */
 		.name = "destination_pitch",
 		.pitch = 3 * 4,
-		.dst_pitch = 5,
 		.clip = DRM_RECT_INIT(0, 0, 3, 3),
 		.xrgb8888 = {
 			0xA10E449C, 0xB1114D05, 0xC1A80303,
 			0xD16C7073, 0xA20E449C, 0xB2114D05,
 			0xC2A80303, 0xD26C7073, 0xA30E449C,
 		},
+		.rgb332_result = {
+			.dst_pitch = 5,
 			.expected = {
 				0x0A, 0x08, 0xA0, 0x00, 0x00,
 				0x6D, 0x0A, 0x08, 0x00, 0x00,
 				0xA0, 0x6D, 0x0A, 0x00, 0x00,
 			},
 		},
+	},
 };
 
 /*
@@ -138,6 +150,7 @@ KUNIT_ARRAY_PARAM(convert_xrgb8888, convert_xrgb8888_cases,
 static void xrgb8888_to_rgb332_test(struct kunit *test)
 {
 	const struct convert_xrgb8888_case *params = test->param_value;
+	const struct convert_to_rgb332_result *result = &params->rgb332_result;
 	size_t dst_size;
 	__u8 *dst = NULL;
 	__u32 *src = NULL;
@@ -147,7 +160,7 @@ static void xrgb8888_to_rgb332_test(struct kunit *test)
 		.pitches = { params->pitch, 0, 0 },
 	};
 
-	dst_size = conversion_buf_size(DRM_FORMAT_RGB332, params->dst_pitch,
+	dst_size = conversion_buf_size(DRM_FORMAT_RGB332, result->dst_pitch,
 				       &params->clip);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
@@ -157,9 +170,9 @@ static void xrgb8888_to_rgb332_test(struct kunit *test)
 	src = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, src);
 
-	drm_fb_xrgb8888_to_rgb332(dst, params->dst_pitch, src, &fb,
+	drm_fb_xrgb8888_to_rgb332(dst, result->dst_pitch, src, &fb,
 				  &params->clip);
-	KUNIT_EXPECT_EQ(test, memcmp(dst, params->expected, dst_size), 0);
+	KUNIT_EXPECT_EQ(test, memcmp(dst, result->expected, dst_size), 0);
 }
 
 static struct kunit_case drm_format_helper_test_cases[] = {