Re: [PATCH 6/6] drm/format-helper: Add KUnit tests for drm_fb_memcpy()

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On 05/08/23 10:26, Maira Canal wrote:
> On 7/21/23 15:23, Arthur Grillo wrote:
>> Insert parameterized test for the drm_fb_memcpy() to ensure correctness
>> and prevent future regressions. The test case can accept different
>> formats.
>>
>> Signed-off-by: Arthur Grillo <arthurgrillo@xxxxxxxxxx>
>> ---
>>   .../gpu/drm/tests/drm_format_helper_test.c    | 391 ++++++++++++++++++
>>   1 file changed, 391 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c
>> index 6ecd92898e8e..3db4b95f3a98 100644
>> --- a/drivers/gpu/drm/tests/drm_format_helper_test.c
>> +++ b/drivers/gpu/drm/tests/drm_format_helper_test.c
>> @@ -1189,6 +1189,396 @@ static void drm_test_fb_build_fourcc_list(struct kunit *test)
>>       KUNIT_EXPECT_MEMEQ(test, fourccs_out, params->expected, TEST_BUF_SIZE);
>>   }
>>   +struct fb_memcpy_result {
>> +    unsigned int dst_pitches[DRM_FORMAT_MAX_PLANES];
>> +    const u32 expected[DRM_FORMAT_MAX_PLANES][TEST_BUF_SIZE];
>> +};
>> +
>> +struct multi_plane_op_case {
>> +    const char *name;
>> +    u32 format;
>> +    struct drm_rect clip;
>> +    unsigned int src_pitches[DRM_FORMAT_MAX_PLANES];
>> +    const u32 src[DRM_FORMAT_MAX_PLANES][TEST_BUF_SIZE];
>> +    struct fb_memcpy_result memcpy_result;
>> +};
>> +
>> +/* The `src` and `expected` buffers are u32 arrays. To deal with planes that
>> + * have a cpp != 4 the values are stored together on the same u32 number in a
>> + * way so the order in memory is correct in a little-endian machine.
>> + *
>> + * Because of that, on some occasions, parts of a u32 will not be part of the
>> + * test, to make this explicit the 0xFF byte is used on those parts.
>> + */
>> +
>> +static struct multi_plane_op_case multi_plane_op_cases[] = {
>> +    {
>> +        .name = "single_pixel_source_buffer",
>> +        .format = DRM_FORMAT_XRGB8888,
>> +        .clip = DRM_RECT_INIT(0, 0, 1, 1),
>> +        .src_pitches = { 1 * 4 },
>> +        .src = {{ 0x01020304 }},
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {{ 0x01020304 }},
>> +        }
>> +    },
>> +    {
>> +        .name = "single_pixel_source_buffer",
>> +        .format = DRM_FORMAT_XRGB8888_A8,
>> +        .clip = DRM_RECT_INIT(0, 0, 1, 1),
>> +        .src_pitches = { 1 * 4, 1 },
>> +        .src = {
>> +            { 0x01020304 },
>> +            { 0xFFFFFF01 },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                { 0x01020304 },
>> +                { 0x00000001 },
>> +            },
>> +        },
>> +    },
> 
> Some tests have the same description name. Could you distinct them with
> different names?

The test description is formed not only by the `.name` attribute but also by the
string representation of the `.format` attribute, so two test descriptions are
distinct if they have the same `.name` but different `.format`.

Best Regards,
~Arthur Grillo

> 
> Best Regards,
> - Maíra
> 
>> +    {
>> +        .name = "single_pixel_source_buffer",
>> +        .format = DRM_FORMAT_YUV444,
>> +        .clip = DRM_RECT_INIT(0, 0, 1, 1),
>> +        .src_pitches = { 1, 1, 1 },
>> +        .src = {
>> +            { 0xFFFFFF01 },
>> +            { 0xFFFFFF01 },
>> +            { 0xFFFFFF01 },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                { 0x00000001 },
>> +                { 0x00000001 },
>> +                { 0x00000001 },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "single_pixel_clip_rectangle",
>> +        .format = DRM_FORMAT_XBGR8888,
>> +        .clip = DRM_RECT_INIT(1, 1, 1, 1),
>> +        .src_pitches = { 2 * 4 },
>> +        .src = {
>> +            {
>> +                0x00000000, 0x00000000,
>> +                0x00000000, 0x01020304,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                { 0x01020304 },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "single_pixel_clip_rectangle",
>> +        .format = DRM_FORMAT_XRGB8888_A8,
>> +        .clip = DRM_RECT_INIT(1, 1, 1, 1),
>> +        .src_pitches = { 2 * 4, 2 * 1 },
>> +        .src = {
>> +            {
>> +                0x00000000, 0x00000000,
>> +                0x00000000, 0x01020304,
>> +            },
>> +            { 0x01000000 },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                { 0x01020304 },
>> +                { 0x00000001 },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "single_pixel_clip_rectangle",
>> +        .format = DRM_FORMAT_YUV444,
>> +        .clip = DRM_RECT_INIT(1, 1, 1, 1),
>> +        .src_pitches = { 2 * 1, 2 * 1, 2 * 1 },
>> +        .src = {
>> +            { 0x01000000 },
>> +            { 0x01000000 },
>> +            { 0x01000000 },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                { 0x00000001 },
>> +                { 0x00000001 },
>> +                { 0x00000001 },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "well_known_colors",
>> +        .format = DRM_FORMAT_XBGR8888,
>> +        .clip = DRM_RECT_INIT(1, 1, 2, 4),
>> +        .src_pitches = { 4 * 4 },
>> +        .src = {
>> +            {
>> +                0x00000000, 0x00000000, 0x00000000, 0x00000000,
>> +                0x00000000, 0x11FFFFFF, 0x22000000, 0x00000000,
>> +                0x00000000, 0x33FF0000, 0x4400FF00, 0x00000000,
>> +                0x00000000, 0x550000FF, 0x66FF00FF, 0x00000000,
>> +                0x00000000, 0x77FFFF00, 0x8800FFFF, 0x00000000,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                {
>> +                    0x11FFFFFF, 0x22000000,
>> +                    0x33FF0000, 0x4400FF00,
>> +                    0x550000FF, 0x66FF00FF,
>> +                    0x77FFFF00, 0x8800FFFF,
>> +                },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "well_known_colors",
>> +        .format = DRM_FORMAT_XRGB8888_A8,
>> +        .clip = DRM_RECT_INIT(1, 1, 2, 4),
>> +        .src_pitches = { 4 * 4, 4 * 1 },
>> +        .src = {
>> +            {
>> +                0x00000000, 0x00000000, 0x00000000, 0x00000000,
>> +                0x00000000, 0xFFFFFFFF, 0xFF000000, 0x00000000,
>> +                0x00000000, 0xFFFF0000, 0xFF00FF00, 0x00000000,
>> +                0x00000000, 0xFF0000FF, 0xFFFF00FF, 0x00000000,
>> +                0x00000000, 0xFFFFFF00, 0xFF00FFFF, 0x00000000,
>> +            },
>> +            {
>> +                0x00000000,
>> +                0x00221100,
>> +                0x00443300,
>> +                0x00665500,
>> +                0x00887700,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                {
>> +                    0xFFFFFFFF, 0xFF000000,
>> +                    0xFFFF0000, 0xFF00FF00,
>> +                    0xFF0000FF, 0xFFFF00FF,
>> +                    0xFFFFFF00, 0xFF00FFFF,
>> +                },
>> +                {
>> +                    0x44332211,
>> +                    0x88776655,
>> +                },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "well_known_colors",
>> +        .format = DRM_FORMAT_YUV444,
>> +        .clip = DRM_RECT_INIT(1, 1, 2, 4),
>> +        .src_pitches = { 4 * 1, 4 * 1, 4 * 1 },
>> +        .src = {
>> +            {
>> +                0x00000000,
>> +                0x0000FF00,
>> +                0x00954C00,
>> +                0x00691D00,
>> +                0x00B2E100,
>> +            },
>> +            {
>> +                0x00000000,
>> +                0x00000000,
>> +                0x00BEDE00,
>> +                0x00436500,
>> +                0x00229B00,
>> +            },
>> +            {
>> +                0x00000000,
>> +                0x00000000,
>> +                0x007E9C00,
>> +                0x0083E700,
>> +                0x00641A00,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { TEST_USE_DEFAULT_PITCH },
>> +            .expected = {
>> +                {
>> +                    0x954C00FF,
>> +                    0xB2E1691D,
>> +                },
>> +                {
>> +                    0xBEDE0000,
>> +                    0x229B4365,
>> +                },
>> +                {
>> +                    0x7E9C0000,
>> +                    0x641A83E7,
>> +                },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "destination_pitch",
>> +        .format = DRM_FORMAT_XBGR8888,
>> +        .clip = DRM_RECT_INIT(0, 0, 3, 3),
>> +        .src_pitches = { 3 * 4 },
>> +        .src = {
>> +            {
>> +                0xA10E449C, 0xB1114D05, 0xC1A8F303,
>> +                0xD16CF073, 0xA20E449C, 0xB2114D05,
>> +                0xC2A80303, 0xD26CF073, 0xA30E449C,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { 5 * 4 },
>> +            .expected = {
>> +                {
>> +                    0xA10E449C, 0xB1114D05, 0xC1A8F303, 0x00000000, 0x00000000,
>> +                    0xD16CF073, 0xA20E449C, 0xB2114D05, 0x00000000, 0x00000000,
>> +                    0xC2A80303, 0xD26CF073, 0xA30E449C, 0x00000000, 0x00000000,
>> +                },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "destination_pitch",
>> +        .format = DRM_FORMAT_XRGB8888_A8,
>> +        .clip = DRM_RECT_INIT(0, 0, 3, 3),
>> +        .src_pitches = { 3 * 4, 3 * 1 },
>> +        .src = {
>> +            {
>> +                0xFF0E449C, 0xFF114D05, 0xFFA8F303,
>> +                0xFF6CF073, 0xFF0E449C, 0xFF114D05,
>> +                0xFFA80303, 0xFF6CF073, 0xFF0E449C,
>> +            },
>> +            {
>> +                0xB2C1B1A1,
>> +                0xD2A3D1A2,
>> +                0xFFFFFFC2,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { 5 * 4, 5 * 1 },
>> +            .expected = {
>> +                {
>> +                    0xFF0E449C, 0xFF114D05, 0xFFA8F303, 0x00000000, 0x00000000,
>> +                    0xFF6CF073, 0xFF0E449C, 0xFF114D05, 0x00000000, 0x00000000,
>> +                    0xFFA80303, 0xFF6CF073, 0xFF0E449C, 0x00000000, 0x00000000,
>> +                },
>> +                {
>> +                    0x00C1B1A1,
>> +                    0xD1A2B200,
>> +                    0xD2A30000,
>> +                    0xFF0000C2,
>> +                },
>> +            },
>> +        },
>> +    },
>> +    {
>> +        .name = "destination_pitch",
>> +        .format = DRM_FORMAT_YUV444,
>> +        .clip = DRM_RECT_INIT(0, 0, 3, 3),
>> +        .src_pitches = { 3 * 1, 3 * 1, 3 * 1 },
>> +        .src = {
>> +            {
>> +                0xBAC1323D,
>> +                0xBA34323D,
>> +                0xFFFFFF3D,
>> +            },
>> +            {
>> +                0xE1ABEC2A,
>> +                0xE1EAEC2A,
>> +                0xFFFFFF2A,
>> +            },
>> +            {
>> +                0xBCEBE4D7,
>> +                0xBC65E4D7,
>> +                0xFFFFFFD7,
>> +            },
>> +        },
>> +        .memcpy_result = {
>> +            .dst_pitches = { 5 * 1, 5 * 1, 5 * 1 },
>> +            .expected = {
>> +                {
>> +                    0x00C1323D,
>> +                    0x323DBA00,
>> +                    0xBA340000,
>> +                    0xFF00003D,
>> +                },
>> +                {
>> +                    0x00ABEC2A,
>> +                    0xEC2AE100,
>> +                    0xE1EA0000,
>> +                    0xFF00002A,
>> +                },
>> +                {
>> +                    0x00EBE4D7,
>> +                    0xE4D7BC00,
>> +                    0xBC650000,
>> +                    0xFF0000D7,
>> +                },
>> +            },
>> +        },
>> +    },
>> +};
>> +
>> +static void multi_plane_op_case_desc(struct multi_plane_op_case *t, char *desc)
>> +{
>> +    snprintf(desc, KUNIT_PARAM_DESC_SIZE, "%s: %p4cc", t->name, &t->format);
>> +}
>> +
>> +KUNIT_ARRAY_PARAM(multi_plane_op, multi_plane_op_cases, multi_plane_op_case_desc);
>> +
>> +static void drm_test_fb_memcpy(struct kunit *test)
>> +{
>> +    const struct multi_plane_op_case *params = test->param_value;
>> +    const struct fb_memcpy_result *result = &params->memcpy_result;
>> +    size_t dst_size[DRM_FORMAT_MAX_PLANES] = { 0 };
>> +    u32 *buf[DRM_FORMAT_MAX_PLANES] = { 0 };
>> +    u32 *src_cp[DRM_FORMAT_MAX_PLANES] = { 0 };
>> +    u32 *expected[DRM_FORMAT_MAX_PLANES] = { 0 };
>> +    struct iosys_map dst[DRM_FORMAT_MAX_PLANES];
>> +    struct iosys_map src[DRM_FORMAT_MAX_PLANES];
>> +
>> +    struct drm_framebuffer fb = {
>> +        .format = drm_format_info(params->format),
>> +    };
>> +
>> +    memcpy(fb.pitches, params->src_pitches, DRM_FORMAT_MAX_PLANES * sizeof(int));
>> +
>> +    for (size_t i = 0; i < fb.format->num_planes; i++) {
>> +        dst_size[i] = conversion_buf_size(params->format, result->dst_pitches[i],
>> +                          &params->clip, i);
>> +        KUNIT_ASSERT_GT(test, dst_size[i], 0);
>> +
>> +        buf[i] = kunit_kzalloc(test, dst_size[i], GFP_KERNEL);
>> +        KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf[i]);
>> +        iosys_map_set_vaddr(&dst[i], buf[i]);
>> +
>> +        src_cp[i] = cpubuf_to_le32(test, params->src[i], TEST_BUF_SIZE);
>> +        iosys_map_set_vaddr(&src[i], src_cp[i]);
>> +    }
>> +
>> +    if (result->dst_pitches[0] == TEST_USE_DEFAULT_PITCH)
>> +        drm_fb_memcpy(dst, NULL, src, &fb, &params->clip);
>> +    else
>> +        drm_fb_memcpy(dst, result->dst_pitches, src, &fb, &params->clip);
>> +
>> +    for (size_t i = 0; i < fb.format->num_planes; i++) {
>> +        expected[i] = cpubuf_to_le32(test, result->expected[i], TEST_BUF_SIZE);
>> +        KUNIT_EXPECT_MEMEQ_MSG(test, buf[i], expected[i], dst_size[i],
>> +                       "Failed expectation on plane %zu", i);
>> +    }
>> +}
>> +
>>   static struct kunit_case drm_format_helper_test_cases[] = {
>>       KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_gray8, convert_xrgb8888_gen_params),
>>       KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_rgb332, convert_xrgb8888_gen_params),
>> @@ -1204,6 +1594,7 @@ static struct kunit_case drm_format_helper_test_cases[] = {
>>       KUNIT_CASE_PARAM(drm_test_fb_swab, convert_xrgb8888_gen_params),
>>       KUNIT_CASE_PARAM(drm_test_fb_clip_offset, clip_offset_gen_params),
>>       KUNIT_CASE_PARAM(drm_test_fb_build_fourcc_list, fb_build_fourcc_list_gen_params),
>> +    KUNIT_CASE_PARAM(drm_test_fb_memcpy, multi_plane_op_gen_params),
>>       {}
>>   };
>>   



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