Re: [PATCH v2 03/13] drm/format-helper: Fix test-input format conversion

["José Expósito" <jose.exposito89@gmail.com>]

On Tue, Dec 20, 2022 at 05:11:35PM +0100, Thomas Zimmermann wrote:
> Convert test input for format helpers from host byte order to
> little-endian order. The current code does it the other way around,
> but there's no effective difference to the result.
> 
> Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>

Reviewed-by: José Expósito <jose.exposito89@gmail.com>

> ---
>  .../gpu/drm/tests/drm_format_helper_test.c    | 35 +++++++++++++------
>  1 file changed, 25 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/gpu/drm/tests/drm_format_helper_test.c b/drivers/gpu/drm/tests/drm_format_helper_test.c
> index cd1d7da3483c..e7c49e6d3f6d 100644
> --- a/drivers/gpu/drm/tests/drm_format_helper_test.c
> +++ b/drivers/gpu/drm/tests/drm_format_helper_test.c
> @@ -279,6 +279,21 @@ static u32 *le32buf_to_cpu(struct kunit *test, const u32 *buf, size_t buf_size)
>  	return dst;
>  }
>  
> +static __le32 *cpubuf_to_le32(struct kunit *test, const u32 *buf, size_t buf_size)
> +{
> +	__le32 *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] = cpu_to_le32(buf[n]);
> +
> +	return dst;
> +}
> +
>  static void convert_xrgb8888_case_desc(struct convert_xrgb8888_case *t,
>  				       char *desc)
>  {
> @@ -294,7 +309,7 @@ static void drm_test_fb_xrgb8888_to_gray8(struct kunit *test)
>  	const struct convert_to_gray8_result *result = &params->gray8_result;
>  	size_t dst_size;
>  	__u8 *buf = NULL;
> -	__u32 *xrgb8888 = NULL;
> +	__le32 *xrgb8888 = NULL;
>  	struct iosys_map dst, src;
>  
>  	struct drm_framebuffer fb = {
> @@ -310,7 +325,7 @@ static void drm_test_fb_xrgb8888_to_gray8(struct kunit *test)
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
>  	iosys_map_set_vaddr(&dst, buf);
>  
> -	xrgb8888 = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
> +	xrgb8888 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
>  	iosys_map_set_vaddr(&src, xrgb8888);
>  
> @@ -324,7 +339,7 @@ static void drm_test_fb_xrgb8888_to_rgb332(struct kunit *test)
>  	const struct convert_to_rgb332_result *result = &params->rgb332_result;
>  	size_t dst_size;
>  	__u8 *buf = NULL;
> -	__u32 *xrgb8888 = NULL;
> +	__le32 *xrgb8888 = NULL;
>  	struct iosys_map dst, src;
>  
>  	struct drm_framebuffer fb = {
> @@ -340,7 +355,7 @@ static void drm_test_fb_xrgb8888_to_rgb332(struct kunit *test)
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
>  	iosys_map_set_vaddr(&dst, buf);
>  
> -	xrgb8888 = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
> +	xrgb8888 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
>  	iosys_map_set_vaddr(&src, xrgb8888);
>  
> @@ -354,7 +369,7 @@ static void drm_test_fb_xrgb8888_to_rgb565(struct kunit *test)
>  	const struct convert_to_rgb565_result *result = &params->rgb565_result;
>  	size_t dst_size;
>  	__u16 *buf = NULL;
> -	__u32 *xrgb8888 = NULL;
> +	__le32 *xrgb8888 = NULL;
>  	struct iosys_map dst, src;
>  
>  	struct drm_framebuffer fb = {
> @@ -370,7 +385,7 @@ static void drm_test_fb_xrgb8888_to_rgb565(struct kunit *test)
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
>  	iosys_map_set_vaddr(&dst, buf);
>  
> -	xrgb8888 = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
> +	xrgb8888 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
>  	iosys_map_set_vaddr(&src, xrgb8888);
>  
> @@ -387,7 +402,7 @@ static void drm_test_fb_xrgb8888_to_rgb888(struct kunit *test)
>  	const struct convert_to_rgb888_result *result = &params->rgb888_result;
>  	size_t dst_size;
>  	__u8 *buf = NULL;
> -	__u32 *xrgb8888 = NULL;
> +	__le32 *xrgb8888 = NULL;
>  	struct iosys_map dst, src;
>  
>  	struct drm_framebuffer fb = {
> @@ -403,7 +418,7 @@ static void drm_test_fb_xrgb8888_to_rgb888(struct kunit *test)
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
>  	iosys_map_set_vaddr(&dst, buf);
>  
> -	xrgb8888 = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
> +	xrgb8888 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
>  	iosys_map_set_vaddr(&src, xrgb8888);
>  
> @@ -421,7 +436,7 @@ static void drm_test_fb_xrgb8888_to_xrgb2101010(struct kunit *test)
>  	const struct convert_to_xrgb2101010_result *result = &params->xrgb2101010_result;
>  	size_t dst_size;
>  	__u32 *buf = NULL;
> -	__u32 *xrgb8888 = NULL;
> +	__le32 *xrgb8888 = NULL;
>  	struct iosys_map dst, src;
>  
>  	struct drm_framebuffer fb = {
> @@ -437,7 +452,7 @@ static void drm_test_fb_xrgb8888_to_xrgb2101010(struct kunit *test)
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buf);
>  	iosys_map_set_vaddr(&dst, buf);
>  
> -	xrgb8888 = le32buf_to_cpu(test, params->xrgb8888, TEST_BUF_SIZE);
> +	xrgb8888 = cpubuf_to_le32(test, params->xrgb8888, TEST_BUF_SIZE);
>  	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, xrgb8888);
>  	iosys_map_set_vaddr(&src, xrgb8888);
>  
> -- 
> 2.39.0
>