Re: [PATCH v2 9/9] drm/vkms: Create KUnit tests for YUV conversions

Arthur Grillo
2024-02-26T16:39:23Z

On 23/02/24 08:37, Louis Chauvet wrote:
> From: Arthur Grillo <arthurgrillo@riseup.net>
>
> Create KUnit tests to test the conversion between YUV and RGB. Test each
> conversion and range combination with some common colors.
>
> Signed-off-by: Arthur Grillo <arthurgrillo@riseup.net>
> [Louis Chauvet: fix minor formating issues (whitespace, double line)]
> Signed-off-by: Louis Chauvet <louis.chauvet@bootlin.com>
> ---
> drivers/gpu/drm/vkms/Makefile | 1 +
> drivers/gpu/drm/vkms/tests/.kunitconfig | 4 +
> drivers/gpu/drm/vkms/tests/Makefile | 3 +
> drivers/gpu/drm/vkms/tests/vkms_format_test.c | 155 ++++++++++++++++++++++++++
> drivers/gpu/drm/vkms/vkms_formats.c | 9 +-
> drivers/gpu/drm/vkms/vkms_formats.h | 5 +
> 6 files changed, 175 insertions(+), 2 deletions(-)

You need to add the CONFIG_DRM_VKMS_KUNIT_TESTS config to
drivers/gpu/drm/vkms/Kconfig, like my previous patch did.

Best Regards,
~Arthur Grillo

>
> diff --git a/drivers/gpu/drm/vkms/Makefile b/drivers/gpu/drm/vkms/Makefile
> index 1b28a6a32948..8d3e46dde635 100644
> --- a/drivers/gpu/drm/vkms/Makefile
> +++ b/drivers/gpu/drm/vkms/Makefile
> @@ -9,3 +9,4 @@ vkms-y := \
> vkms_writeback.o
>
> obj-$(CONFIG_DRM_VKMS) += vkms.o
> +obj-$(CONFIG_DRM_VKMS_KUNIT_TESTS) += tests/
> diff --git a/drivers/gpu/drm/vkms/tests/.kunitconfig b/drivers/gpu/drm/vkms/tests/.kunitconfig
> new file mode 100644
> index 000000000000..70e378228cbd
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/tests/.kunitconfig
> @@ -0,0 +1,4 @@
> +CONFIG_KUNIT=y
> +CONFIG_DRM=y
> +CONFIG_DRM_VKMS=y
> +CONFIG_DRM_VKMS_KUNIT_TESTS=y
> diff --git a/drivers/gpu/drm/vkms/tests/Makefile b/drivers/gpu/drm/vkms/tests/Makefile
> new file mode 100644
> index 000000000000..2d1df668569e
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/tests/Makefile
> @@ -0,0 +1,3 @@
> +# SPDX-License-Identifier: GPL-2.0-only
> +
> +obj-$(CONFIG_DRM_VKMS_KUNIT_TESTS) += vkms_format_test.o
> diff --git a/drivers/gpu/drm/vkms/tests/vkms_format_test.c b/drivers/gpu/drm/vkms/tests/vkms_format_test.c
> new file mode 100644
> index 000000000000..cb6d32ff115d
> --- /dev/null
> +++ b/drivers/gpu/drm/vkms/tests/vkms_format_test.c
> @@ -0,0 +1,155 @@
> +// SPDX-License-Identifier: GPL-2.0+
> +
> +#include <kunit/test.h>
> +
> +#include <drm/drm_fixed.h>
> +#include <drm/drm_fourcc.h>
> +#include <drm/drm_print.h>
> +
> +#include "../../drm_crtc_internal.h"
> +
> +#include "../vkms_drv.h"
> +#include "../vkms_formats.h"
> +
> +#define TEST_BUFF_SIZE 50
> +
> +struct yuv_u8_to_argb_u16_case {
> + enum drm_color_encoding encoding;
> + enum drm_color_range range;
> + size_t n_colors;
> + struct format_pair {
> + char *name;
> + struct pixel_yuv_u8 yuv;
> + struct pixel_argb_u16 argb;
> + } colors[TEST_BUFF_SIZE];
> +};
> +
> +static struct yuv_u8_to_argb_u16_case yuv_u8_to_argb_u16_cases[] = {
> + {
> + .encoding = DRM_COLOR_YCBCR_BT601,
> + .range = DRM_COLOR_YCBCR_FULL_RANGE,
> + .n_colors = 6,
> + .colors = {
> + {"white", {0xff, 0x80, 0x80}, {0x0000, 0xffff, 0xffff, 0xffff}},
> + {"gray", {0x80, 0x80, 0x80}, {0x0000, 0x8000, 0x8000, 0x8000}},
> + {"black", {0x00, 0x80, 0x80}, {0x0000, 0x0000, 0x0000, 0x0000}},
> + {"red", {0x4c, 0x55, 0xff}, {0x0000, 0xffff, 0x0000, 0x0000}},
> + {"green", {0x96, 0x2c, 0x15}, {0x0000, 0x0000, 0xffff, 0x0000}},
> + {"blue", {0x1d, 0xff, 0x6b}, {0x0000, 0x0000, 0x0000, 0xffff}},
> + },
> + },
> + {
> + .encoding = DRM_COLOR_YCBCR_BT601,
> + .range = DRM_COLOR_YCBCR_LIMITED_RANGE,
> + .n_colors = 6,
> + .colors = {
> + {"white", {0xeb, 0x80, 0x80}, {0x0000, 0xffff, 0xffff, 0xffff}},
> + {"gray", {0x7e, 0x80, 0x80}, {0x0000, 0x8000, 0x8000, 0x8000}},
> + {"black", {0x10, 0x80, 0x80}, {0x0000, 0x0000, 0x0000, 0x0000}},
> + {"red", {0x51, 0x5a, 0xf0}, {0x0000, 0xffff, 0x0000, 0x0000}},
> + {"green", {0x91, 0x36, 0x22}, {0x0000, 0x0000, 0xffff, 0x0000}},
> + {"blue", {0x29, 0xf0, 0x6e}, {0x0000, 0x0000, 0x0000, 0xffff}},
> + },
> + },
> + {
> + .encoding = DRM_COLOR_YCBCR_BT709,
> + .range = DRM_COLOR_YCBCR_FULL_RANGE,
> + .n_colors = 4,
> + .colors = {
> + {"white", {0xff, 0x80, 0x80}, {0x0000, 0xffff, 0xffff, 0xffff}},
> + {"gray", {0x80, 0x80, 0x80}, {0x0000, 0x8000, 0x8000, 0x8000}},
> + {"black", {0x00, 0x80, 0x80}, {0x0000, 0x0000, 0x0000, 0x0000}},
> + {"red", {0x35, 0x63, 0xff}, {0x0000, 0xffff, 0x0000, 0x0000}},
> + {"green", {0xb6, 0x1e, 0x0c}, {0x0000, 0x0000, 0xffff, 0x0000}},
> + {"blue", {0x12, 0xff, 0x74}, {0x0000, 0x0000, 0x0000, 0xffff}},
> + },
> + },
> + {
> + .encoding = DRM_COLOR_YCBCR_BT709,
> + .range = DRM_COLOR_YCBCR_LIMITED_RANGE,
> + .n_colors = 4,
> + .colors = {
> + {"white", {0xeb, 0x80, 0x80}, {0x0000, 0xffff, 0xffff, 0xffff}},
> + {"gray", {0x7e, 0x80, 0x80}, {0x0000, 0x8000, 0x8000, 0x8000}},
> + {"black", {0x10, 0x80, 0x80}, {0x0000, 0x0000, 0x0000, 0x0000}},
> + {"red", {0x3f, 0x66, 0xf0}, {0x0000, 0xffff, 0x0000, 0x0000}},
> + {"green", {0xad, 0x2a, 0x1a}, {0x0000, 0x0000, 0xffff, 0x0000}},
> + {"blue", {0x20, 0xf0, 0x76}, {0x0000, 0x0000, 0x0000, 0xffff}},
> + },
> + },
> + {
> + .encoding = DRM_COLOR_YCBCR_BT2020,
> + .range = DRM_COLOR_YCBCR_FULL_RANGE,
> + .n_colors = 4,
> + .colors = {
> + {"white", {0xff, 0x80, 0x80}, {0x0000, 0xffff, 0xffff, 0xffff}},
> + {"gray", {0x80, 0x80, 0x80}, {0x0000, 0x8000, 0x8000, 0x8000}},
> + {"black", {0x00, 0x80, 0x80}, {0x0000, 0x0000, 0x0000, 0x0000}},
> + {"red", {0x43, 0x5c, 0xff}, {0x0000, 0xffff, 0x0000, 0x0000}},
> + {"green", {0xad, 0x24, 0x0b}, {0x0000, 0x0000, 0xffff, 0x0000}},
> + {"blue", {0x0f, 0xff, 0x76}, {0x0000, 0x0000, 0x0000, 0xffff}},
> + },
> + },
> + {
> + .encoding = DRM_COLOR_YCBCR_BT2020,
> + .range = DRM_COLOR_YCBCR_LIMITED_RANGE,
> + .n_colors = 4,
> + .colors = {
> + {"white", {0xeb, 0x80, 0x80}, {0x0000, 0xffff, 0xffff, 0xffff}},
> + {"gray", {0x7e, 0x80, 0x80}, {0x0000, 0x8000, 0x8000, 0x8000}},
> + {"black", {0x10, 0x80, 0x80}, {0x0000, 0x0000, 0x0000, 0x0000}},
> + {"red", {0x4a, 0x61, 0xf0}, {0x0000, 0xffff, 0x0000, 0x0000}},
> + {"green", {0xa4, 0x2f, 0x19}, {0x0000, 0x0000, 0xffff, 0x0000}},
> + {"blue", {0x1d, 0xf0, 0x77}, {0x0000, 0x0000, 0x0000, 0xffff}},
> + },
> + },
> +};
> +
> +static void vkms_format_test_yuv_u8_to_argb_u16(struct kunit *test)
> +{
> + const struct yuv_u8_to_argb_u16_case *param = test->param_value;
> + struct pixel_argb_u16 argb;
> +
> + for (size_t i = 0; i < param->n_colors; i++) {
> + const struct format_pair *color = &param->colors[i];
> +
> + yuv_u8_to_argb_u16(&argb, &color->yuv, param->encoding, param->range);
> +
> + KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.a, color->argb.a), 257,
> + "On the A channel of the color %s expected 0x%04x, got 0x%04x",
> + color->name, color->argb.a, argb.a);
> + KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.r, color->argb.r), 257,
> + "On the R channel of the color %s expected 0x%04x, got 0x%04x",
> + color->name, color->argb.r, argb.r);
> + KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.g, color->argb.g), 257,
> + "On the G channel of the color %s expected 0x%04x, got 0x%04x",
> + color->name, color->argb.g, argb.g);
> + KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.b, color->argb.b), 257,
> + "On the B channel of the color %s expected 0x%04x, got 0x%04x",
> + color->name, color->argb.b, argb.b);
> + }
> +}
> +
> +static void vkms_format_test_yuv_u8_to_argb_u16_case_desc(struct yuv_u8_to_argb_u16_case *t,
> + char *desc)
> +{
> + snprintf(desc, KUNIT_PARAM_DESC_SIZE, "%s - %s",
> + drm_get_color_encoding_name(t->encoding), drm_get_color_range_name(t->range));
> +}
> +
> +KUNIT_ARRAY_PARAM(yuv_u8_to_argb_u16, yuv_u8_to_argb_u16_cases,
> + vkms_format_test_yuv_u8_to_argb_u16_case_desc);
> +
> +static struct kunit_case vkms_format_test_cases[] = {
> + KUNIT_CASE_PARAM(vkms_format_test_yuv_u8_to_argb_u16, yuv_u8_to_argb_u16_gen_params),
> + {}
> +};
> +
> +static struct kunit_suite vkms_format_test_suite = {
> + .name = "vkms-format",
> + .test_cases = vkms_format_test_cases,
> +};
> +
> +kunit_test_suite(vkms_format_test_suite);
> +
> +MODULE_LICENSE("GPL");
> diff --git a/drivers/gpu/drm/vkms/vkms_formats.c b/drivers/gpu/drm/vkms/vkms_formats.c
> index 515c80866a58..20dd23ce9051 100644
> --- a/drivers/gpu/drm/vkms/vkms_formats.c
> +++ b/drivers/gpu/drm/vkms/vkms_formats.c
> @@ -7,6 +7,8 @@
> #include <drm/drm_rect.h>
> #include <drm/drm_fixed.h>
>
> +#include <kunit/visibility.h>
> +
> #include "vkms_formats.h"
>
> /**
> @@ -175,8 +177,10 @@ static void ycbcr2rgb(const s16 m[3][3], u8 y, u8 cb, u8 cr, u8 y_offset, u8 *r,
> *b = clamp(b_16, 0, 0xffff) >> 8;
> }
>
> -static void yuv_u8_to_argb_u16(struct pixel_argb_u16 *argb_u16, const struct pixel_yuv_u8 *yuv_u8,
> - enum drm_color_encoding encoding, enum drm_color_range range)
> +VISIBLE_IF_KUNIT void yuv_u8_to_argb_u16(struct pixel_argb_u16 *argb_u16,
> + const struct pixel_yuv_u8 *yuv_u8,
> + enum drm_color_encoding encoding,
> + enum drm_color_range range)
> {
> static const s16 bt601_full[3][3] = {
> { 256, 0, 359 },
> @@ -237,6 +241,7 @@ static void yuv_u8_to_argb_u16(struct pixel_argb_u16 *argb_u16, const struct pix
> argb_u16->g = g * 257;
> argb_u16->b = b * 257;
> }
> +EXPORT_SYMBOL_IF_KUNIT(yuv_u8_to_argb_u16);
>
> /*
> * The following functions are read_line function for each pixel format supported by VKMS.
> diff --git a/drivers/gpu/drm/vkms/vkms_formats.h b/drivers/gpu/drm/vkms/vkms_formats.h
> index 5a3a9e1328d8..4245a5c5e956 100644
> --- a/drivers/gpu/drm/vkms/vkms_formats.h
> +++ b/drivers/gpu/drm/vkms/vkms_formats.h
> @@ -13,4 +13,9 @@ struct pixel_yuv_u8 {
> u8 y, u, v;
> };
>
> +#if IS_ENABLED(CONFIG_KUNIT)
> +void yuv_u8_to_argb_u16(struct pixel_argb_u16 *argb_u16, const struct pixel_yuv_u8 *yuv_u8,
> + enum drm_color_encoding encoding, enum drm_color_range range);
> +#endif
> +
> #endif /* _VKMS_FORMATS_H_ */
>