On Tue, Dec 20, 2022 at 05:11:40PM +0100, Thomas Zimmermann wrote:
> Add dedicated helper to convert from XRGB8888 to ARGB2101010. Sets
> all alpha bits to make pixels fully opaque.
>
> v2:
> * set correct format in struct drm_framebuffer (Javier)
> * use cpubuf_to_le32()
> * type fixes
>
> Signed-off-by: Thomas Zimmermann <tzimmermann@xxxxxxx>
> Reviewed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
Reviewed-by: José Expósito <jose.exposito89@xxxxxxxxx>
> ---
> drivers/gpu/drm/drm_format_helper.c | 58 ++++++++++++++++-
> .../gpu/drm/tests/drm_format_helper_test.c | 63 +++++++++++++++++++
> include/drm/drm_format_helper.h | 3 +
> 3 files changed, 122 insertions(+), 2 deletions(-)
>
> diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c
> index 23837b202988..3767213ba97d 100644
> --- a/drivers/gpu/drm/drm_format_helper.c
> +++ b/drivers/gpu/drm/drm_format_helper.c
> @@ -605,6 +605,59 @@ void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map *dst, const unsigned int *d
> }
> EXPORT_SYMBOL(drm_fb_xrgb8888_to_xrgb2101010);
>
> +static void drm_fb_xrgb8888_to_argb2101010_line(void *dbuf, const void *sbuf, unsigned int pixels)
> +{
> + __le32 *dbuf32 = dbuf;
> + const __le32 *sbuf32 = sbuf;
> + unsigned int x;
> + u32 val32;
> + u32 pix;
> +
> + for (x = 0; x < pixels; x++) {
> + pix = le32_to_cpu(sbuf32[x]);
> + val32 = ((pix & 0x000000ff) << 2) |
> + ((pix & 0x0000ff00) << 4) |
> + ((pix & 0x00ff0000) << 6);
> + pix = GENMASK(31, 30) | /* set alpha bits */
> + val32 | ((val32 >> 8) & 0x00300c03);
> + *dbuf32++ = cpu_to_le32(pix);
> + }
> +}
> +
> +/**
> + * drm_fb_xrgb8888_to_argb2101010 - Convert XRGB8888 to ARGB2101010 clip buffer
> + * @dst: Array of ARGB2101010 destination buffers
> + * @dst_pitch: Array of numbers of bytes between the start of two consecutive scanlines
> + * within @dst; can be NULL if scanlines are stored next to each other.
> + * @src: Array of XRGB8888 source buffers
> + * @fb: DRM framebuffer
> + * @clip: Clip rectangle area to copy
> + *
> + * This function copies parts of a framebuffer to display memory and converts
> + * the color format during the process. The parameters @dst, @dst_pitch and
> + * @src refer to arrays. Each array must have at least as many entries as
> + * there are planes in @fb's format. Each entry stores the value for the
> + * format's respective color plane at the same index.
> + *
> + * This function does not apply clipping on @dst (i.e. the destination is at the
> + * top-left corner).
> + *
> + * Drivers can use this function for ARGB2101010 devices that don't support XRGB8888
> + * natively.
> + */
> +void drm_fb_xrgb8888_to_argb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
> + const struct iosys_map *src, const struct drm_framebuffer *fb,
> + const struct drm_rect *clip)
> +{
> + static const u8 dst_pixsize[DRM_FORMAT_MAX_PLANES] = {
> + 4,
> + };
> +
> + drm_fb_xfrm(dst, dst_pitch, dst_pixsize, src, fb, clip, false,
> + drm_fb_xrgb8888_to_argb2101010_line);
> +}
> +EXPORT_SYMBOL(drm_fb_xrgb8888_to_argb2101010);
> +
> static void drm_fb_xrgb8888_to_gray8_line(void *dbuf, const void *sbuf, unsigned int pixels)
> {
> u8 *dbuf8 = dbuf;
> @@ -696,8 +749,6 @@ int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t d
> fb_format = DRM_FORMAT_XRGB8888;
> if (fb_format == DRM_FORMAT_ARGB2101010)
> fb_format = DRM_FORMAT_XRGB2101010;
> - if (dst_format == DRM_FORMAT_ARGB2101010)
> - dst_format = DRM_FORMAT_XRGB2101010;
>
> if (fb_format == dst_format) {
> drm_fb_memcpy(dst, dst_pitch, src, fb, clip);
> @@ -721,6 +772,9 @@ int drm_fb_blit(struct iosys_map *dst, const unsigned int *dst_pitch, uint32_t d
> } else if (dst_format == DRM_FORMAT_XRGB2101010) {
> drm_fb_xrgb8888_to_xrgb2101010(dst, dst_pitch, src, fb, clip);
> return 0;
> + } else if (dst_format == DRM_FORMAT_ARGB2101010) {
> + drm_fb_xrgb8888_to_argb2101010(dst, dst_pitch, src, fb, clip);
> + return 0;
> } else if (dst_format == DRM_FORMAT_BGRX8888) {
> drm_fb_swab(dst, dst_pitch, src, fb, clip, false);
> return 0;
> diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c
> index bc969413a412..de3aa252e8eb 100644
> --- a/drivers/gpu/drm/tests/drm_format_helper_test.c
> +++ b/drivers/gpu/drm/tests/drm_format_helper_test.c
> @@ -47,6 +47,11 @@ struct convert_to_xrgb2101010_result {
> const u32 expected[TEST_BUF_SIZE];
> };
>
> +struct convert_to_argb2101010_result {
> + unsigned int dst_pitch;
> + const u32 expected[TEST_BUF_SIZE];
> +};
> +
> struct convert_xrgb8888_case {
> const char *name;
> unsigned int pitch;
> @@ -58,6 +63,7 @@ struct convert_xrgb8888_case {
> struct convert_to_rgb888_result rgb888_result;
> struct convert_to_argb8888_result argb8888_result;
> struct convert_to_xrgb2101010_result xrgb2101010_result;
> + struct convert_to_argb2101010_result argb2101010_result;
> };
>
> static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> @@ -91,6 +97,10 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> .dst_pitch = 0,
> .expected = { 0x3FF00000 },
> },
> + .argb2101010_result = {
> + .dst_pitch = 0,
> + .expected = { 0xFFF00000 },
> + },
> },
> {
> .name = "single_pixel_clip_rectangle",
> @@ -125,6 +135,10 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> .dst_pitch = 0,
> .expected = { 0x3FF00000 },
> },
> + .argb2101010_result = {
> + .dst_pitch = 0,
> + .expected = { 0xFFF00000 },
> + },
> },
> {
> /* Well known colors: White, black, red, green, blue, magenta,
> @@ -201,6 +215,15 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> 0x3FFFFC00, 0x000FFFFF,
> },
> },
> + .argb2101010_result = {
> + .dst_pitch = 0,
> + .expected = {
> + 0xFFFFFFFF, 0xC0000000,
> + 0xFFF00000, 0xC00FFC00,
> + 0xC00003FF, 0xFFF003FF,
> + 0xFFFFFC00, 0xC00FFFFF,
> + },
> + },
> },
> {
> /* Randomly picked colors. Full buffer within the clip area. */
> @@ -268,6 +291,14 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
> 0x2A20300C, 0x1B1705CD, 0x03844672, 0x00000000, 0x00000000,
> },
> },
> + .argb2101010_result = {
> + .dst_pitch = 20,
> + .expected = {
> + 0xC3844672, 0xC444D414, 0xEA20300C, 0x00000000, 0x00000000,
> + 0xDB1705CD, 0xC3844672, 0xC444D414, 0x00000000, 0x00000000,
> + 0xEA20300C, 0xDB1705CD, 0xC3844672, 0x00000000, 0x00000000,
> + },
> + },
> },
> };
>
> @@ -541,6 +572,37 @@ static void drm_test_fb_xrgb8888_to_xrgb2101010(struct kunit *test)
> KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
> }
>
> +static void drm_test_fb_xrgb8888_to_argb2101010(struct kunit *test)
> +{
> + const struct convert_xrgb8888_case *params = test->param_value;
> + const struct convert_to_argb2101010_result *result = ¶ms->argb2101010_result;
> + size_t dst_size;
> + u32 *buf = NULL;
> + __le32 *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_ARGB2101010,
> + 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 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
> + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
> + iosys_map_set_vaddr(&src, xrgb8888);
> +
> + drm_fb_xrgb8888_to_argb2101010(&dst, &result->dst_pitch, &src, &fb, ¶ms->clip);
> + buf = le32buf_to_cpu(test, (__force const __le32 *)buf, dst_size / sizeof(u32));
> + 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_gray8, convert_xrgb8888_gen_params),
> KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_rgb332, convert_xrgb8888_gen_params),
> @@ -548,6 +610,7 @@ static struct kunit_case drm_format_helper_test_cases[] = {
> KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_rgb888, convert_xrgb8888_gen_params),
> KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_argb8888, convert_xrgb8888_gen_params),
> KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_xrgb2101010, convert_xrgb8888_gen_params),
> + KUNIT_CASE_PARAM(drm_test_fb_xrgb8888_to_argb2101010, convert_xrgb8888_gen_params),
> {}
> };
>
> diff --git a/include/drm/drm_format_helper.h b/include/drm/drm_format_helper.h
> index 3ce8129dfe43..10b2d19cdb66 100644
> --- a/include/drm/drm_format_helper.h
> +++ b/include/drm/drm_format_helper.h
> @@ -39,6 +39,9 @@ void drm_fb_xrgb8888_to_argb8888(struct iosys_map *dst, const unsigned int *dst_
> void drm_fb_xrgb8888_to_xrgb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> +void drm_fb_xrgb8888_to_argb2101010(struct iosys_map *dst, const unsigned int *dst_pitch,
> + const struct iosys_map *src, const struct drm_framebuffer *fb,
> + const struct drm_rect *clip);
> void drm_fb_xrgb8888_to_gray8(struct iosys_map *dst, const unsigned int *dst_pitch,
> const struct iosys_map *src, const struct drm_framebuffer *fb,
> const struct drm_rect *clip);
> --
> 2.39.0
>
