drm/tests: Add multi-plane support to conversion_buf_size()

The drm_fb_memcpy() supports multi-plane formats. To fully test it in
the future, add multi-plane support to the conversion_buf_size() helper.
Signed-off-by: Arthur Grillo <arthurgrillo@riseup.net>
Reviewed-by: Maíra Canal <mairacanal@riseup.net>
Signed-off-by: Maíra Canal <mairacanal@riseup.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20230814-gsoc-drm-format-test-v2-v3-5-bd3e9f9bc2fb@riseup.net

drivers/gpu/drm/tests/drm_format_helper_test.c

@@ -472,7 +472,7 @@ static struct convert_xrgb8888_case convert_xrgb8888_cases[] = {
  * The size of the destination buffer or negative value on error.
  */
 static size_t conversion_buf_size(u32 dst_format, unsigned int dst_pitch,
-				  const struct drm_rect *clip)
+				  const struct drm_rect *clip, int plane)
 {
 	const struct drm_format_info *dst_fi = drm_format_info(dst_format);
 
@@ -480,7 +480,7 @@ static size_t conversion_buf_size(u32 dst_format, unsigned int dst_pitch,
 		return -EINVAL;
 
 	if (!dst_pitch)
-		dst_pitch = drm_format_info_min_pitch(dst_fi, 0, drm_rect_width(clip));
+		dst_pitch = drm_format_info_min_pitch(dst_fi, plane, drm_rect_width(clip));
 
 	return dst_pitch * drm_rect_height(clip);
 }
@@ -554,7 +554,7 @@ static void drm_test_fb_xrgb8888_to_gray8(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_R8, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -588,7 +588,7 @@ static void drm_test_fb_xrgb8888_to_rgb332(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_RGB332, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -621,7 +621,7 @@ static void drm_test_fb_xrgb8888_to_rgb565(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_RGB565, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -660,7 +660,7 @@ static void drm_test_fb_xrgb8888_to_xrgb1555(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_XRGB1555, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -694,7 +694,7 @@ static void drm_test_fb_xrgb8888_to_argb1555(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_ARGB1555, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -728,7 +728,7 @@ static void drm_test_fb_xrgb8888_to_rgba5551(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_RGBA5551, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -762,7 +762,7 @@ static void drm_test_fb_xrgb8888_to_rgb888(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_RGB888, result->dst_pitch,
-				       &params->clip);
+				       &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -799,7 +799,7 @@ static void drm_test_fb_xrgb8888_to_argb8888(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_ARGB8888,
-				       result->dst_pitch, &params->clip);
+				       result->dst_pitch, &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -833,7 +833,7 @@ static void drm_test_fb_xrgb8888_to_xrgb2101010(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_XRGB2101010,
-				       result->dst_pitch, &params->clip);
+				       result->dst_pitch, &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -867,7 +867,7 @@ static void drm_test_fb_xrgb8888_to_argb2101010(struct kunit *test)
 	};
 
 	dst_size = conversion_buf_size(DRM_FORMAT_ARGB2101010,
-				       result->dst_pitch, &params->clip);
+				       result->dst_pitch, &params->clip, 0);
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
 	buf = kunit_kzalloc(test, dst_size, GFP_KERNEL);
@@ -900,7 +900,7 @@ static void drm_test_fb_xrgb8888_to_mono(struct kunit *test)
 		.pitches = { params->pitch, 0, 0 },
 	};
 
-	dst_size = conversion_buf_size(DRM_FORMAT_C1, result->dst_pitch, &params->clip);
+	dst_size = conversion_buf_size(DRM_FORMAT_C1, result->dst_pitch, &params->clip, 0);
 
 	KUNIT_ASSERT_GT(test, dst_size, 0);
 
@@ -933,7 +933,7 @@ static void drm_test_fb_swab(struct kunit *test)
 		.pitches = { params->pitch, 0, 0 },
 	};
 
-	dst_size = conversion_buf_size(DRM_FORMAT_XRGB8888, result->dst_pitch, &params->clip);
+	dst_size = conversion_buf_size(DRM_FORMAT_XRGB8888, result->dst_pitch, &params->clip, 0);
 
 	KUNIT_ASSERT_GT(test, dst_size, 0);