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Diffstat (limited to 'drivers/gpu/drm/vkms/tests/vkms_format_test.c')
-rw-r--r--drivers/gpu/drm/vkms/tests/vkms_format_test.c279
1 files changed, 279 insertions, 0 deletions
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..a7788fbc45dc
--- /dev/null
+++ b/drivers/gpu/drm/vkms/tests/vkms_format_test.c
@@ -0,0 +1,279 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <kunit/test.h>
+
+#include <drm/drm_fixed.h>
+#include <drm/drm_fourcc.h>
+
+#include "../../drm_crtc_internal.h"
+
+#include "../vkms_formats.h"
+
+#define TEST_BUFF_SIZE 50
+
+MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");
+
+/**
+ * struct pixel_yuv_u16 - Internal representation of a pixel color.
+ * @y: Luma value, stored in 16 bits, without padding, using
+ * machine endianness
+ * @u: Blue difference chroma value, stored in 16 bits, without padding, using
+ * machine endianness
+ * @v: Red difference chroma value, stored in 16 bits, without padding, using
+ * machine endianness
+ */
+struct pixel_yuv_u16 {
+ u16 y, u, v;
+};
+
+/*
+ * struct yuv_u16_to_argb_u16_case - Reference values to test the color
+ * conversions in VKMS between YUV to ARGB
+ *
+ * @encoding: Encoding used to convert RGB to YUV
+ * @range: Range used to convert RGB to YUV
+ * @n_colors: Count of test colors in this case
+ * @format_pair.name: Name used for this color conversion, used to
+ * clarify the test results
+ * @format_pair.rgb: RGB color tested
+ * @format_pair.yuv: Same color as @format_pair.rgb, but converted to
+ * YUV using @encoding and @range.
+ */
+struct yuv_u16_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_u16 yuv;
+ struct pixel_argb_u16 argb;
+ } colors[TEST_BUFF_SIZE];
+};
+
+/*
+ * The YUV color representation were acquired via the colour python framework.
+ * Below are the function calls used for generating each case.
+ *
+ * For more information got to the docs:
+ * https://colour.readthedocs.io/en/master/generated/colour.RGB_to_YCbCr.html
+ */
+static struct yuv_u16_to_argb_u16_case yuv_u16_to_argb_u16_cases[] = {
+ /*
+ * colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
+ * K=colour.WEIGHTS_YCBCR["ITU-R BT.601"],
+ * in_bits = 16,
+ * in_legal = False,
+ * in_int = True,
+ * out_bits = 16,
+ * out_legal = False,
+ * out_int = True)
+ *
+ * Tests cases for color conversion generated by converting RGB
+ * values to YUV BT601 full range using the ITU-R BT.601 weights.
+ */
+ {
+ .encoding = DRM_COLOR_YCBCR_BT601,
+ .range = DRM_COLOR_YCBCR_FULL_RANGE,
+ .n_colors = 6,
+ .colors = {
+ { "white", { 0xffff, 0x8000, 0x8000 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
+ { "gray", { 0x8080, 0x8000, 0x8000 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
+ { "black", { 0x0000, 0x8000, 0x8000 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
+ { "red", { 0x4c8b, 0x54ce, 0xffff }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
+ { "green", { 0x9645, 0x2b33, 0x14d1 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
+ { "blue", { 0x1d2f, 0xffff, 0x6b2f }, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ }
+ },
+ /*
+ * colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
+ * K=colour.WEIGHTS_YCBCR["ITU-R BT.601"],
+ * in_bits = 16,
+ * in_legal = False,
+ * in_int = True,
+ * out_bits = 16,
+ * out_legal = True,
+ * out_int = True)
+ * Tests cases for color conversion generated by converting RGB
+ * values to YUV BT601 limited range using the ITU-R BT.601 weights.
+ */
+ {
+ .encoding = DRM_COLOR_YCBCR_BT601,
+ .range = DRM_COLOR_YCBCR_LIMITED_RANGE,
+ .n_colors = 6,
+ .colors = {
+ { "white", { 0xeb00, 0x8000, 0x8000 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
+ { "gray", { 0x7dee, 0x8000, 0x8000 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
+ { "black", { 0x1000, 0x8000, 0x8000 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
+ { "red", { 0x517b, 0x5a34, 0xf000 }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
+ { "green", { 0x908e, 0x35cc, 0x2237 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
+ { "blue", { 0x28f7, 0xf000, 0x6dc9 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ }
+ },
+ /*
+ * colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
+ * K=colour.WEIGHTS_YCBCR["ITU-R BT.709"],
+ * in_bits = 16,
+ * in_legal = False,
+ * in_int = True,
+ * out_bits = 16,
+ * out_legal = False,
+ * out_int = True)
+ * Tests cases for color conversion generated by converting RGB
+ * values to YUV BT709 full range using the ITU-R BT.709 weights.
+ */
+ {
+ .encoding = DRM_COLOR_YCBCR_BT709,
+ .range = DRM_COLOR_YCBCR_FULL_RANGE,
+ .n_colors = 6,
+ .colors = {
+ { "white", { 0xffff, 0x8000, 0x8000 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
+ { "gray", { 0x8080, 0x8000, 0x8000 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
+ { "black", { 0x0000, 0x8000, 0x8000 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
+ { "red", { 0x366d, 0x62ac, 0xffff }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
+ { "green", { 0xb717, 0x1d55, 0x0bbd }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
+ { "blue", { 0x127c, 0xffff, 0x7443 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ }
+ },
+ /*
+ * colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
+ * K=colour.WEIGHTS_YCBCR["ITU-R BT.709"],
+ * in_bits = 16,
+ * in_legal = False,
+ * in_int = True,
+ * out_bits = 16,
+ * out_legal = True,
+ * out_int = True)
+ * Tests cases for color conversion generated by converting RGB
+ * values to YUV BT709 limited range using the ITU-R BT.709 weights.
+ */
+ {
+ .encoding = DRM_COLOR_YCBCR_BT709,
+ .range = DRM_COLOR_YCBCR_LIMITED_RANGE,
+ .n_colors = 6,
+ .colors = {
+ { "white", { 0xeb00, 0x8000, 0x8000 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
+ { "gray", { 0x7dee, 0x8000, 0x8000 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
+ { "black", { 0x1000, 0x8000, 0x8000 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
+ { "red", { 0x3e8f, 0x6656, 0xf000 }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
+ { "green", { 0xaca1, 0x29aa, 0x1a45 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
+ { "blue", { 0x1fd0, 0xf000, 0x75bb }, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ }
+ },
+ /*
+ * colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
+ * K=colour.WEIGHTS_YCBCR["ITU-R BT.2020"],
+ * in_bits = 16,
+ * in_legal = False,
+ * in_int = True,
+ * out_bits = 16,
+ * out_legal = False,
+ * out_int = True)
+ * Tests cases for color conversion generated by converting RGB
+ * values to YUV BT2020 full range using the ITU-R BT.2020 weights.
+ */
+ {
+ .encoding = DRM_COLOR_YCBCR_BT2020,
+ .range = DRM_COLOR_YCBCR_FULL_RANGE,
+ .n_colors = 6,
+ .colors = {
+ { "white", { 0xffff, 0x8000, 0x8000 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
+ { "gray", { 0x8080, 0x8000, 0x8000 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
+ { "black", { 0x0000, 0x8000, 0x8000 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
+ { "red", { 0x4340, 0x5c41, 0xffff }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
+ { "green", { 0xad91, 0x23bf, 0x0a4c }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
+ { "blue", { 0x0f2e, 0xffff, 0x75b5 }, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ }
+ },
+ /*
+ * colour.RGB_to_YCbCr(<rgb color in 16 bit form>,
+ * K=colour.WEIGHTS_YCBCR["ITU-R BT.2020"],
+ * in_bits = 16,
+ * in_legal = False,
+ * in_int = True,
+ * out_bits = 16,
+ * out_legal = True,
+ * out_int = True)
+ * Tests cases for color conversion generated by converting RGB
+ * values to YUV BT2020 limited range using the ITU-R BT.2020 weights.
+ */
+ {
+ .encoding = DRM_COLOR_YCBCR_BT2020,
+ .range = DRM_COLOR_YCBCR_LIMITED_RANGE,
+ .n_colors = 6,
+ .colors = {
+ { "white", { 0xeb00, 0x8000, 0x8000 }, { 0xffff, 0xffff, 0xffff, 0xffff }},
+ { "gray", { 0x7dee, 0x8000, 0x8000 }, { 0xffff, 0x8080, 0x8080, 0x8080 }},
+ { "black", { 0x1000, 0x8000, 0x8000 }, { 0xffff, 0x0000, 0x0000, 0x0000 }},
+ { "red", { 0x4988, 0x60b9, 0xf000 }, { 0xffff, 0xffff, 0x0000, 0x0000 }},
+ { "green", { 0xa47b, 0x2f47, 0x1902 }, { 0xffff, 0x0000, 0xffff, 0x0000 }},
+ { "blue", { 0x1cfd, 0xf000, 0x76fe }, { 0xffff, 0x0000, 0x0000, 0xffff }},
+ }
+ },
+};
+
+/*
+ * vkms_format_test_yuv_u16_to_argb_u16 - Testing the conversion between YUV
+ * colors to ARGB colors in VKMS
+ *
+ * This test will use the functions get_conversion_matrix_to_argb_u16 and
+ * argb_u16_from_yuv161616 to convert YUV colors (stored in
+ * yuv_u16_to_argb_u16_cases) into ARGB colors.
+ *
+ * The conversion between YUV and RGB is not totally reversible, so there may be
+ * some difference between the expected value and the result.
+ */
+static void vkms_format_test_yuv_u16_to_argb_u16(struct kunit *test)
+{
+ const struct yuv_u16_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];
+ struct conversion_matrix matrix;
+
+ get_conversion_matrix_to_argb_u16
+ (DRM_FORMAT_NV12, param->encoding, param->range, &matrix);
+
+ argb = argb_u16_from_yuv161616(&matrix, color->yuv.y, color->yuv.u,
+ color->yuv.v);
+
+ KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.a, color->argb.a), 0x1ff,
+ "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), 0x1ff,
+ "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), 0x1ff,
+ "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), 0x1ff,
+ "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_u16_to_argb_u16_case_desc(struct yuv_u16_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_u16_to_argb_u16, yuv_u16_to_argb_u16_cases,
+ vkms_format_test_yuv_u16_to_argb_u16_case_desc
+);
+
+static struct kunit_case vkms_format_test_cases[] = {
+ KUNIT_CASE_PARAM(vkms_format_test_yuv_u16_to_argb_u16, yuv_u16_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");
+MODULE_DESCRIPTION("Kunit test for vkms format conversion");
generated by cgit v1.2.3 (git 2.39.0) at 2025-10-05 12:34:24 +0300