1 // SPDX-License-Identifier: GPL-2.0+ 2 3 #include <kunit/test.h> 4 5 #include <drm/drm_fixed.h> 6 #include <drm/drm_fourcc.h> 7 8 #include "../../drm_crtc_internal.h" 9 10 #include "../vkms_formats.h" 11 12 #define TEST_BUFF_SIZE 50 13 14 MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING"); 15 16 /** 17 * struct pixel_yuv_u8 - Internal representation of a pixel color. 18 * @y: Luma value, stored in 8 bits, without padding, using 19 * machine endianness 20 * @u: Blue difference chroma value, stored in 8 bits, without padding, using 21 * machine endianness 22 * @v: Red difference chroma value, stored in 8 bits, without padding, using 23 * machine endianness 24 */ 25 struct pixel_yuv_u8 { 26 u8 y, u, v; 27 }; 28 29 /* 30 * struct yuv_u8_to_argb_u16_case - Reference values to test the color 31 * conversions in VKMS between YUV to ARGB 32 * 33 * @encoding: Encoding used to convert RGB to YUV 34 * @range: Range used to convert RGB to YUV 35 * @n_colors: Count of test colors in this case 36 * @format_pair.name: Name used for this color conversion, used to 37 * clarify the test results 38 * @format_pair.rgb: RGB color tested 39 * @format_pair.yuv: Same color as @format_pair.rgb, but converted to 40 * YUV using @encoding and @range. 41 */ 42 struct yuv_u8_to_argb_u16_case { 43 enum drm_color_encoding encoding; 44 enum drm_color_range range; 45 size_t n_colors; 46 struct format_pair { 47 char *name; 48 struct pixel_yuv_u8 yuv; 49 struct pixel_argb_u16 argb; 50 } colors[TEST_BUFF_SIZE]; 51 }; 52 53 /* 54 * The YUV color representation were acquired via the colour python framework. 55 * Below are the function calls used for generating each case. 56 * 57 * For more information got to the docs: 58 * https://colour.readthedocs.io/en/master/generated/colour.RGB_to_YCbCr.html 59 */ 60 static struct yuv_u8_to_argb_u16_case yuv_u8_to_argb_u16_cases[] = { 61 /* 62 * colour.RGB_to_YCbCr(<rgb color in 16 bit form>, 63 * K=colour.WEIGHTS_YCBCR["ITU-R BT.601"], 64 * in_bits = 16, 65 * in_legal = False, 66 * in_int = True, 67 * out_bits = 8, 68 * out_legal = False, 69 * out_int = True) 70 * 71 * Tests cases for color conversion generated by converting RGB 72 * values to YUV BT601 full range using the ITU-R BT.601 weights. 73 */ 74 { 75 .encoding = DRM_COLOR_YCBCR_BT601, 76 .range = DRM_COLOR_YCBCR_FULL_RANGE, 77 .n_colors = 6, 78 .colors = { 79 { "white", { 0xff, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }}, 80 { "gray", { 0x80, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }}, 81 { "black", { 0x00, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }}, 82 { "red", { 0x4c, 0x55, 0xff }, { 0xffff, 0xffff, 0x0000, 0x0000 }}, 83 { "green", { 0x96, 0x2c, 0x15 }, { 0xffff, 0x0000, 0xffff, 0x0000 }}, 84 { "blue", { 0x1d, 0xff, 0x6b }, { 0xffff, 0x0000, 0x0000, 0xffff }}, 85 }, 86 }, 87 /* 88 * colour.RGB_to_YCbCr(<rgb color in 16 bit form>, 89 * K=colour.WEIGHTS_YCBCR["ITU-R BT.601"], 90 * in_bits = 16, 91 * in_legal = False, 92 * in_int = True, 93 * out_bits = 8, 94 * out_legal = True, 95 * out_int = True) 96 * Tests cases for color conversion generated by converting RGB 97 * values to YUV BT601 limited range using the ITU-R BT.601 weights. 98 */ 99 { 100 .encoding = DRM_COLOR_YCBCR_BT601, 101 .range = DRM_COLOR_YCBCR_LIMITED_RANGE, 102 .n_colors = 6, 103 .colors = { 104 { "white", { 0xeb, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }}, 105 { "gray", { 0x7e, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }}, 106 { "black", { 0x10, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }}, 107 { "red", { 0x51, 0x5a, 0xf0 }, { 0xffff, 0xffff, 0x0000, 0x0000 }}, 108 { "green", { 0x91, 0x36, 0x22 }, { 0xffff, 0x0000, 0xffff, 0x0000 }}, 109 { "blue", { 0x29, 0xf0, 0x6e }, { 0xffff, 0x0000, 0x0000, 0xffff }}, 110 }, 111 }, 112 /* 113 * colour.RGB_to_YCbCr(<rgb color in 16 bit form>, 114 * K=colour.WEIGHTS_YCBCR["ITU-R BT.709"], 115 * in_bits = 16, 116 * in_legal = False, 117 * in_int = True, 118 * out_bits = 8, 119 * out_legal = False, 120 * out_int = True) 121 * Tests cases for color conversion generated by converting RGB 122 * values to YUV BT709 full range using the ITU-R BT.709 weights. 123 */ 124 { 125 .encoding = DRM_COLOR_YCBCR_BT709, 126 .range = DRM_COLOR_YCBCR_FULL_RANGE, 127 .n_colors = 6, 128 .colors = { 129 { "white", { 0xff, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }}, 130 { "gray", { 0x80, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }}, 131 { "black", { 0x00, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }}, 132 { "red", { 0x36, 0x63, 0xff }, { 0xffff, 0xffff, 0x0000, 0x0000 }}, 133 { "green", { 0xb6, 0x1e, 0x0c }, { 0xffff, 0x0000, 0xffff, 0x0000 }}, 134 { "blue", { 0x12, 0xff, 0x74 }, { 0xffff, 0x0000, 0x0000, 0xffff }}, 135 }, 136 }, 137 /* 138 * colour.RGB_to_YCbCr(<rgb color in 16 bit form>, 139 * K=colour.WEIGHTS_YCBCR["ITU-R BT.709"], 140 * in_bits = 16, 141 * int_legal = False, 142 * in_int = True, 143 * out_bits = 8, 144 * out_legal = True, 145 * out_int = True) 146 * Tests cases for color conversion generated by converting RGB 147 * values to YUV BT709 limited range using the ITU-R BT.709 weights. 148 */ 149 { 150 .encoding = DRM_COLOR_YCBCR_BT709, 151 .range = DRM_COLOR_YCBCR_LIMITED_RANGE, 152 .n_colors = 6, 153 .colors = { 154 { "white", { 0xeb, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }}, 155 { "gray", { 0x7e, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }}, 156 { "black", { 0x10, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }}, 157 { "red", { 0x3f, 0x66, 0xf0 }, { 0xffff, 0xffff, 0x0000, 0x0000 }}, 158 { "green", { 0xad, 0x2a, 0x1a }, { 0xffff, 0x0000, 0xffff, 0x0000 }}, 159 { "blue", { 0x20, 0xf0, 0x76 }, { 0xffff, 0x0000, 0x0000, 0xffff }}, 160 }, 161 }, 162 /* 163 * colour.RGB_to_YCbCr(<rgb color in 16 bit form>, 164 * K=colour.WEIGHTS_YCBCR["ITU-R BT.2020"], 165 * in_bits = 16, 166 * in_legal = False, 167 * in_int = True, 168 * out_bits = 8, 169 * out_legal = False, 170 * out_int = True) 171 * Tests cases for color conversion generated by converting RGB 172 * values to YUV BT2020 full range using the ITU-R BT.2020 weights. 173 */ 174 { 175 .encoding = DRM_COLOR_YCBCR_BT2020, 176 .range = DRM_COLOR_YCBCR_FULL_RANGE, 177 .n_colors = 6, 178 .colors = { 179 { "white", { 0xff, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }}, 180 { "gray", { 0x80, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }}, 181 { "black", { 0x00, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }}, 182 { "red", { 0x43, 0x5c, 0xff }, { 0xffff, 0xffff, 0x0000, 0x0000 }}, 183 { "green", { 0xad, 0x24, 0x0b }, { 0xffff, 0x0000, 0xffff, 0x0000 }}, 184 { "blue", { 0x0f, 0xff, 0x76 }, { 0xffff, 0x0000, 0x0000, 0xffff }}, 185 }, 186 }, 187 /* 188 * colour.RGB_to_YCbCr(<rgb color in 16 bit form>, 189 * K=colour.WEIGHTS_YCBCR["ITU-R BT.2020"], 190 * in_bits = 16, 191 * in_legal = False, 192 * in_int = True, 193 * out_bits = 8, 194 * out_legal = True, 195 * out_int = True) 196 * Tests cases for color conversion generated by converting RGB 197 * values to YUV BT2020 limited range using the ITU-R BT.2020 weights. 198 */ 199 { 200 .encoding = DRM_COLOR_YCBCR_BT2020, 201 .range = DRM_COLOR_YCBCR_LIMITED_RANGE, 202 .n_colors = 6, 203 .colors = { 204 { "white", { 0xeb, 0x80, 0x80 }, { 0xffff, 0xffff, 0xffff, 0xffff }}, 205 { "gray", { 0x7e, 0x80, 0x80 }, { 0xffff, 0x8080, 0x8080, 0x8080 }}, 206 { "black", { 0x10, 0x80, 0x80 }, { 0xffff, 0x0000, 0x0000, 0x0000 }}, 207 { "red", { 0x4a, 0x61, 0xf0 }, { 0xffff, 0xffff, 0x0000, 0x0000 }}, 208 { "green", { 0xa4, 0x2f, 0x19 }, { 0xffff, 0x0000, 0xffff, 0x0000 }}, 209 { "blue", { 0x1d, 0xf0, 0x77 }, { 0xffff, 0x0000, 0x0000, 0xffff }}, 210 }, 211 }, 212 }; 213 214 /* 215 * vkms_format_test_yuv_u8_to_argb_u16 - Testing the conversion between YUV 216 * colors to ARGB colors in VKMS 217 * 218 * This test will use the functions get_conversion_matrix_to_argb_u16 and 219 * argb_u16_from_yuv888 to convert YUV colors (stored in 220 * yuv_u8_to_argb_u16_cases) into ARGB colors. 221 * 222 * The conversion between YUV and RGB is not totally reversible, so there may be 223 * some difference between the expected value and the result. 224 * In addition, there may be some rounding error as the input color is 8 bits 225 * and output color is 16 bits. 226 */ 227 static void vkms_format_test_yuv_u8_to_argb_u16(struct kunit *test) 228 { 229 const struct yuv_u8_to_argb_u16_case *param = test->param_value; 230 struct pixel_argb_u16 argb; 231 232 for (size_t i = 0; i < param->n_colors; i++) { 233 const struct format_pair *color = ¶m->colors[i]; 234 struct conversion_matrix matrix; 235 236 get_conversion_matrix_to_argb_u16 237 (DRM_FORMAT_NV12, param->encoding, param->range, &matrix); 238 239 argb = argb_u16_from_yuv888(color->yuv.y, color->yuv.u, color->yuv.v, &matrix); 240 241 KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.a, color->argb.a), 0x1ff, 242 "On the A channel of the color %s expected 0x%04x, got 0x%04x", 243 color->name, color->argb.a, argb.a); 244 KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.r, color->argb.r), 0x1ff, 245 "On the R channel of the color %s expected 0x%04x, got 0x%04x", 246 color->name, color->argb.r, argb.r); 247 KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.g, color->argb.g), 0x1ff, 248 "On the G channel of the color %s expected 0x%04x, got 0x%04x", 249 color->name, color->argb.g, argb.g); 250 KUNIT_EXPECT_LE_MSG(test, abs_diff(argb.b, color->argb.b), 0x1ff, 251 "On the B channel of the color %s expected 0x%04x, got 0x%04x", 252 color->name, color->argb.b, argb.b); 253 } 254 } 255 256 static void vkms_format_test_yuv_u8_to_argb_u16_case_desc(struct yuv_u8_to_argb_u16_case *t, 257 char *desc) 258 { 259 snprintf(desc, KUNIT_PARAM_DESC_SIZE, "%s - %s", 260 drm_get_color_encoding_name(t->encoding), drm_get_color_range_name(t->range)); 261 } 262 263 KUNIT_ARRAY_PARAM(yuv_u8_to_argb_u16, yuv_u8_to_argb_u16_cases, 264 vkms_format_test_yuv_u8_to_argb_u16_case_desc 265 ); 266 267 static struct kunit_case vkms_format_test_cases[] = { 268 KUNIT_CASE_PARAM(vkms_format_test_yuv_u8_to_argb_u16, yuv_u8_to_argb_u16_gen_params), 269 {} 270 }; 271 272 static struct kunit_suite vkms_format_test_suite = { 273 .name = "vkms-format", 274 .test_cases = vkms_format_test_cases, 275 }; 276 277 kunit_test_suite(vkms_format_test_suite); 278 279 MODULE_LICENSE("GPL"); 280 MODULE_DESCRIPTION("Kunit test for vkms format conversion"); 281