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Subject[PATCH v4 3/3] drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to_gray8()
Date
Extend the existing test cases to test the conversion from XRGB8888 to
grayscale.

Tested-by: Maíra Canal <mairacanal@riseup.net>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: José Expósito <jose.exposito89@gmail.com>
---
.../gpu/drm/tests/drm_format_helper_test.c | 62 +++++++++++++++++++
1 file changed, 62 insertions(+)

diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c
index 09d358b54da0..71722e828abe 100644
--- a/drivers/gpu/drm/tests/drm_format_helper_test.c
+++ b/drivers/gpu/drm/tests/drm_format_helper_test.c
@@ -37,6 +37,11 @@ struct convert_to_xrgb2101010_result {
const u32 expected[TEST_BUF_SIZE];
};

+struct convert_to_gray8_result {
+ unsigned int dst_pitch;
+ const u8 expected[TEST_BUF_SIZE];
+};
+
struct convert_xrgb8888_case {
const char *name;
unsigned int pitch;
@@ -46,6 +51,7 @@ struct convert_xrgb8888_case {
struct convert_to_rgb565_result rgb565_result;
struct convert_to_rgb888_result rgb888_result;
struct convert_to_xrgb2101010_result xrgb2101010_result;
+ struct convert_to_gray8_result gray8_result;
};

static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
@@ -71,6 +77,10 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
.dst_pitch = 0,
.expected = { 0x3FF00000 },
},
+ .gray8_result = {
+ .dst_pitch = 0,
+ .expected = { 0x4C },
+ },
},
{
.name = "single_pixel_clip_rectangle",
@@ -97,6 +107,10 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
.dst_pitch = 0,
.expected = { 0x3FF00000 },
},
+ .gray8_result = {
+ .dst_pitch = 0,
+ .expected = { 0x4C },
+ },
},
{
/* Well known colors: White, black, red, green, blue, magenta,
@@ -155,6 +169,15 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
0x3FFFFC00, 0x000FFFFF,
},
},
+ .gray8_result = {
+ .dst_pitch = 0,
+ .expected = {
+ 0xFF, 0x00,
+ 0x4C, 0x99,
+ 0x19, 0x66,
+ 0xE5, 0xB2,
+ },
+ },
},
{
/* Randomly picked colors. Full buffer within the clip area. */
@@ -206,6 +229,14 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
0x2A20300C, 0x1B1705CD, 0x03844672, 0x00000000, 0x00000000,
},
},
+ .gray8_result = {
+ .dst_pitch = 5,
+ .expected = {
+ 0x3C, 0x33, 0x34, 0x00, 0x00,
+ 0x6F, 0x3C, 0x33, 0x00, 0x00,
+ 0x34, 0x6F, 0x3C, 0x00, 0x00,
+ },
+ },
},
};

@@ -381,11 +412,42 @@ static void drm_test_fb_xrgb8888_to_xrgb2101010_test(struct kunit *test)
KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
}

+static void drm_test_fb_xrgb8888_to_gray8_test(struct kunit *test)
+{
+ const struct convert_xrgb8888_case *params = test->param_value;
+ const struct convert_to_gray8_result *result = &params->gray8_result;
+ size_t dst_size;
+ __u8 *buf = NULL;
+ __u32 *xrgb8888 = NULL;
+ struct iosys_map dst, src;
+
+ struct drm_framebuffer fb = {
+ .format = drm_format_info(DRM_FORMAT_XRGB8888),
+ .pitches = { params->pitch, 0, 0 },
+ };
+
+ dst_size = conversion_buf_size(DRM_FORMAT_R8, result->dst_pitch,
+ &params->clip);
+ KUNIT_ASSERT_GT(test, dst_size, 0);
+
+ buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
+ iosys_map_set_vaddr(&dst, buf);
+
+ xrgb8888 = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
+ KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
+ iosys_map_set_vaddr(&src, xrgb8888);
+
+ drm_fb_xrgb8888_to_gray8(&dst, &result->dst_pitch, &src, &fb, &params->clip);
+ KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
+}
+
static struct kunit_case drm_format_helper_test_cases[] = {
KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_rgb332, convert_xrgb8888_gen_params),
KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_rgb565, convert_xrgb8888_gen_params),
KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_rgb888_test, convert_xrgb8888_gen_params),
KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_xrgb2101010_test, convert_xrgb8888_gen_params),
+ KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_gray8_test, convert_xrgb8888_gen_params),
{}
};

--
2.25.1
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