Re: [PATCH 1/3] drm/format-helper: Add KUnit tests for drm_fb_xrgb8888_to_rgb888()

From: David Gow
Date: Wed Aug 17 2022 - 02:34:51 EST

On Tue, Aug 16, 2022 at 6:29 PM José Expósito <jose.exposito89@xxxxxxxxx> wrote:
>
> Extend the existing test cases to test the conversion from XRGB8888 to
> RGB888.
>
> Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx>
> ---

On the whole, this looks good to me. I'd like to see these tests use
KUNIT_EXPECT_MEMEQ(), but that might have to wait.

One other nitpick below, but otherwise:
Reviewed-by: David Gow <davidgow@xxxxxxxxxx>

Cheers,
-- David

> .../gpu/drm/tests/drm_format_helper_test.c | 65 +++++++++++++++++++
> 1 file changed, 65 insertions(+)
>
> diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c
> index 828487071796..08d08e7ab19a 100644
> --- a/drivers/gpu/drm/tests/drm_format_helper_test.c
> +++ b/drivers/gpu/drm/tests/drm_format_helper_test.c
> @@ -27,6 +27,11 @@ struct convert_to_rgb565_result {
> const u16 expected_swab[TEST_BUF_SIZE];
> };
>
> +struct convert_to_rgb888_result {
> + unsigned int dst_pitch;
> + const u8 expected[TEST_BUF_SIZE];

Could this maybe be 3*TEST_BUF_SIZE? That should match the other,
existing formats, which have room for TEST_BUF_SIZE pixels worth of
data, not TEST_BUF_SIZE bytes.


> +};
> +
> struct convert_xrgb8888_case {
> const char *name;
> unsigned int pitch;
> @@ -34,6 +39,7 @@ struct convert_xrgb8888_case {
> const u32 xrgb8888[TEST_BUF_SIZE];
> struct convert_to_rgb332_result rgb332_result;
> struct convert_to_rgb565_result rgb565_result;
> + struct convert_to_rgb888_result rgb888_result;
> };
>
> static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> @@ -51,6 +57,10 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> .expected = { 0xF800 },
> .expected_swab = { 0x00F8 },
> },
> + .rgb888_result = {
> + .dst_pitch = 0,
> + .expected = { 0x00, 0x00, 0xFF },
> + },
> },
> {
> .name = "single_pixel_clip_rectangle",
> @@ -69,6 +79,10 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> .expected = { 0xF800 },
> .expected_swab = { 0x00F8 },
> },
> + .rgb888_result = {
> + .dst_pitch = 0,
> + .expected = { 0x00, 0x00, 0xFF },
> + },
> },
> {
> /* Well known colors: White, black, red, green, blue, magenta,
> @@ -109,6 +123,15 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> 0xE0FF, 0xFF07,
> },
> },
> + .rgb888_result = {
> + .dst_pitch = 0,
> + .expected = {
> + 0xFF, 0xFF, 0xFF, 0x00, 0x00, 0x00,
> + 0x00, 0x00, 0xFF, 0x00, 0xFF, 0x00,
> + 0xFF, 0x00, 0x00, 0xFF, 0x00, 0xFF,
> + 0x00, 0xFF, 0xFF, 0xFF, 0xFF, 0x00,
> + },
> + },
> },
> {
> /* Randomly picked colors. Full buffer within the clip area. */
> @@ -141,6 +164,17 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> 0x00A8, 0x8E6B, 0x330A, 0x0000, 0x0000,
> },
> },
> + .rgb888_result = {
> + .dst_pitch = 15,
> + .expected = {
> + 0x9C, 0x44, 0x0E, 0x05, 0x4D, 0x11, 0x03, 0x03, 0xA8,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x73, 0x70, 0x6C, 0x9C, 0x44, 0x0E, 0x05, 0x4D, 0x11,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + 0x03, 0x03, 0xA8, 0x73, 0x70, 0x6C, 0x9C, 0x44, 0x0E,
> + 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
> + },
> + },
> },
> };
>
> @@ -255,9 +289,40 @@ static void xrgb8888_to_rgb565_test(struct kunit *test)
> KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected_swab, dst_size), 0);
> }
>
> +static void xrgb8888_to_rgb888_test(struct kunit *test)
> +{
> + const struct convert_xrgb8888_case *params = test->param_value;
> + const struct convert_to_rgb888_result *result = &params->rgb888_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_RGB888, 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_rgb888(&dst, &result->dst_pitch, &src, &fb, &params->clip);
> + KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);

At some point, this should use KUNIT_EXPECT_MEMEQ() rather than
KUNIT_EXPECT_EQ(..., memcmp(...), 0):
https://lore.kernel.org/all/20220808125237.277126-1-mairacanal@xxxxxxxxxx/

Of course, since that's not upstream yet (and probably will go in via
a different tree), it's fine to leave this as-is in this patch, and
tidy it up after they're merged.

> +}
> +
> static struct kunit_case drm_format_helper_test_cases[] = {
> KUNIT_CASE_PARAM(xrgb8888_to_rgb332_test, convert_xrgb8888_gen_params),
> KUNIT_CASE_PARAM(xrgb8888_to_rgb565_test, convert_xrgb8888_gen_params),
> + KUNIT_CASE_PARAM(xrgb8888_to_rgb888_test, convert_xrgb8888_gen_params),
> {}
> };
>
> --
> 2.25.1
>

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