From: Thomas Zimmermann Date: Mon, 2 Jan 2023 11:29:18 +0000 (+0100) Subject: drm/format-helper: Store RGB565 in little-endian order X-Git-Tag: v6.6.17~3937^2~23^2~1074 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=f21d62c9ce3db2c74875a15bec6afbae93ee43cc;p=platform%2Fkernel%2Flinux-rpi.git drm/format-helper: Store RGB565 in little-endian order Fix to-RGB565 conversion helpers to store the result in little- endian byte order. Update test cases as well. Signed-off-by: Thomas Zimmermann Reviewed-by: Maíra Canal Reviewed-by: José Expósito Link: https://patchwork.freedesktop.org/patch/msgid/20230102112927.26565-5-tzimmermann@suse.de --- diff --git a/drivers/gpu/drm/drm_format_helper.c b/drivers/gpu/drm/drm_format_helper.c index b98bd7c..f3f3b38 100644 --- a/drivers/gpu/drm/drm_format_helper.c +++ b/drivers/gpu/drm/drm_format_helper.c @@ -322,7 +322,7 @@ EXPORT_SYMBOL(drm_fb_xrgb8888_to_rgb332); static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigned int pixels) { - u16 *dbuf16 = dbuf; + __le16 *dbuf16 = dbuf; const __le32 *sbuf32 = sbuf; unsigned int x; u16 val16; @@ -333,14 +333,15 @@ static void drm_fb_xrgb8888_to_rgb565_line(void *dbuf, const void *sbuf, unsigne val16 = ((pix & 0x00F80000) >> 8) | ((pix & 0x0000FC00) >> 5) | ((pix & 0x000000F8) >> 3); - dbuf16[x] = val16; + dbuf16[x] = cpu_to_le16(val16); } } +/* TODO: implement this helper as conversion to RGB565|BIG_ENDIAN */ static void drm_fb_xrgb8888_to_rgb565_swab_line(void *dbuf, const void *sbuf, unsigned int pixels) { - u16 *dbuf16 = dbuf; + __le16 *dbuf16 = dbuf; const __le32 *sbuf32 = sbuf; unsigned int x; u16 val16; @@ -351,7 +352,7 @@ static void drm_fb_xrgb8888_to_rgb565_swab_line(void *dbuf, const void *sbuf, val16 = ((pix & 0x00F80000) >> 8) | ((pix & 0x0000FC00) >> 5) | ((pix & 0x000000F8) >> 3); - dbuf16[x] = swab16(val16); + dbuf16[x] = cpu_to_le16(swab16(val16)); } } diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c index e7c49e6..04fe373 100644 --- a/drivers/gpu/drm/tests/drm_format_helper_test.c +++ b/drivers/gpu/drm/tests/drm_format_helper_test.c @@ -264,6 +264,21 @@ static size_t conversion_buf_size(u32 dst_format, unsigned int dst_pitch, return dst_pitch * drm_rect_height(clip); } +static u16 *le16buf_to_cpu(struct kunit *test, const __le16 *buf, size_t buf_size) +{ + u16 *dst = NULL; + int n; + + dst = kunit_kzalloc(test, sizeof(*dst) * buf_size, GFP_KERNEL); + if (!dst) + return NULL; + + for (n = 0; n < buf_size; n++) + dst[n] = le16_to_cpu(buf[n]); + + return dst; +} + static u32 *le32buf_to_cpu(struct kunit *test, const u32 *buf, size_t buf_size) { u32 *dst = NULL; @@ -368,7 +383,7 @@ static void drm_test_fb_xrgb8888_to_rgb565(struct kunit *test) const struct convert_xrgb8888_case *params = test->param_value; const struct convert_to_rgb565_result *result = ¶ms->rgb565_result; size_t dst_size; - __u16 *buf = NULL; + u16 *buf = NULL; __le32 *xrgb8888 = NULL; struct iosys_map dst, src; @@ -390,9 +405,12 @@ static void drm_test_fb_xrgb8888_to_rgb565(struct kunit *test) iosys_map_set_vaddr(&src, xrgb8888); drm_fb_xrgb8888_to_rgb565(&dst, &result->dst_pitch, &src, &fb, ¶ms->clip, false); + buf = le16buf_to_cpu(test, (__force const __le16 *)buf, dst_size / sizeof(__le16)); KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0); + buf = dst.vaddr; /* restore original value of buf */ drm_fb_xrgb8888_to_rgb565(&dst, &result->dst_pitch, &src, &fb, ¶ms->clip, true); + buf = le16buf_to_cpu(test, (__force const __le16 *)buf, dst_size / sizeof(__le16)); KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected_swab, dst_size), 0); }