Hi, On Mon, Sep 19, 2022 at 09:15:31AM +0200, José Expósito wrote: > Extend the existing test cases to test the conversion from XRGB8888 to > grayscale. > > Tested-by: Maíra Canal <mairacanal@xxxxxxxxxx> > Reviewed-by: David Gow <davidgow@xxxxxxxxxx> > Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx> > --- > .../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 = ¶ms->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, > + ¶ms->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, ¶ms->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), The trailing test feels redundant, and we should order them alphabetically to avoid conflicts as much as possible. Feel free to add my Acked-by: Maxime Ripard <maxime@xxxxxxxxxx> And fix this while applying Maxime