1 // SPDX-License-Identifier: MIT 2 3 #include <linux/export.h> 4 #include <linux/module.h> 5 6 #include <drm/display/drm_hdmi_helper.h> 7 #include <drm/drm_connector.h> 8 #include <drm/drm_edid.h> 9 #include <drm/drm_modes.h> 10 #include <drm/drm_print.h> 11 #include <drm/drm_property.h> 12 13 static inline bool is_eotf_supported(u8 output_eotf, u8 sink_eotf) 14 { 15 return sink_eotf & BIT(output_eotf); 16 } 17 18 /** 19 * drm_hdmi_infoframe_set_hdr_metadata() - fill an HDMI DRM infoframe with 20 * HDR metadata from userspace 21 * @frame: HDMI DRM infoframe 22 * @conn_state: Connector state containing HDR metadata 23 * 24 * Return: 0 on success or a negative error code on failure. 25 */ 26 int drm_hdmi_infoframe_set_hdr_metadata(struct hdmi_drm_infoframe *frame, 27 const struct drm_connector_state *conn_state) 28 { 29 struct drm_connector *connector; 30 struct hdr_output_metadata *hdr_metadata; 31 int err; 32 33 if (!frame || !conn_state) 34 return -EINVAL; 35 36 connector = conn_state->connector; 37 38 if (!conn_state->hdr_output_metadata) 39 return -EINVAL; 40 41 hdr_metadata = conn_state->hdr_output_metadata->data; 42 43 if (!hdr_metadata || !connector) 44 return -EINVAL; 45 46 /* Sink EOTF is Bit map while infoframe is absolute values */ 47 if (!is_eotf_supported(hdr_metadata->hdmi_metadata_type1.eotf, 48 connector->display_info.hdr_sink_metadata.hdmi_type1.eotf)) 49 DRM_DEBUG_KMS("Unknown EOTF %d\n", hdr_metadata->hdmi_metadata_type1.eotf); 50 51 err = hdmi_drm_infoframe_init(frame); 52 if (err < 0) 53 return err; 54 55 frame->eotf = hdr_metadata->hdmi_metadata_type1.eotf; 56 frame->metadata_type = hdr_metadata->hdmi_metadata_type1.metadata_type; 57 58 BUILD_BUG_ON(sizeof(frame->display_primaries) != 59 sizeof(hdr_metadata->hdmi_metadata_type1.display_primaries)); 60 BUILD_BUG_ON(sizeof(frame->white_point) != 61 sizeof(hdr_metadata->hdmi_metadata_type1.white_point)); 62 63 memcpy(&frame->display_primaries, 64 &hdr_metadata->hdmi_metadata_type1.display_primaries, 65 sizeof(frame->display_primaries)); 66 67 memcpy(&frame->white_point, 68 &hdr_metadata->hdmi_metadata_type1.white_point, 69 sizeof(frame->white_point)); 70 71 frame->max_display_mastering_luminance = 72 hdr_metadata->hdmi_metadata_type1.max_display_mastering_luminance; 73 frame->min_display_mastering_luminance = 74 hdr_metadata->hdmi_metadata_type1.min_display_mastering_luminance; 75 frame->max_fall = hdr_metadata->hdmi_metadata_type1.max_fall; 76 frame->max_cll = hdr_metadata->hdmi_metadata_type1.max_cll; 77 78 return 0; 79 } 80 EXPORT_SYMBOL(drm_hdmi_infoframe_set_hdr_metadata); 81 82 /* HDMI Colorspace Spec Definitions */ 83 #define FULL_COLORIMETRY_MASK 0x1FF 84 #define NORMAL_COLORIMETRY_MASK 0x3 85 #define EXTENDED_COLORIMETRY_MASK 0x7 86 #define EXTENDED_ACE_COLORIMETRY_MASK 0xF 87 88 #define C(x) ((x) << 0) 89 #define EC(x) ((x) << 2) 90 #define ACE(x) ((x) << 5) 91 92 #define HDMI_COLORIMETRY_NO_DATA 0x0 93 #define HDMI_COLORIMETRY_SMPTE_170M_YCC (C(1) | EC(0) | ACE(0)) 94 #define HDMI_COLORIMETRY_BT709_YCC (C(2) | EC(0) | ACE(0)) 95 #define HDMI_COLORIMETRY_XVYCC_601 (C(3) | EC(0) | ACE(0)) 96 #define HDMI_COLORIMETRY_XVYCC_709 (C(3) | EC(1) | ACE(0)) 97 #define HDMI_COLORIMETRY_SYCC_601 (C(3) | EC(2) | ACE(0)) 98 #define HDMI_COLORIMETRY_OPYCC_601 (C(3) | EC(3) | ACE(0)) 99 #define HDMI_COLORIMETRY_OPRGB (C(3) | EC(4) | ACE(0)) 100 #define HDMI_COLORIMETRY_BT2020_CYCC (C(3) | EC(5) | ACE(0)) 101 #define HDMI_COLORIMETRY_BT2020_RGB (C(3) | EC(6) | ACE(0)) 102 #define HDMI_COLORIMETRY_BT2020_YCC (C(3) | EC(6) | ACE(0)) 103 #define HDMI_COLORIMETRY_DCI_P3_RGB_D65 (C(3) | EC(7) | ACE(0)) 104 #define HDMI_COLORIMETRY_DCI_P3_RGB_THEATER (C(3) | EC(7) | ACE(1)) 105 106 static const u32 hdmi_colorimetry_val[] = { 107 [DRM_MODE_COLORIMETRY_NO_DATA] = HDMI_COLORIMETRY_NO_DATA, 108 [DRM_MODE_COLORIMETRY_SMPTE_170M_YCC] = HDMI_COLORIMETRY_SMPTE_170M_YCC, 109 [DRM_MODE_COLORIMETRY_BT709_YCC] = HDMI_COLORIMETRY_BT709_YCC, 110 [DRM_MODE_COLORIMETRY_XVYCC_601] = HDMI_COLORIMETRY_XVYCC_601, 111 [DRM_MODE_COLORIMETRY_XVYCC_709] = HDMI_COLORIMETRY_XVYCC_709, 112 [DRM_MODE_COLORIMETRY_SYCC_601] = HDMI_COLORIMETRY_SYCC_601, 113 [DRM_MODE_COLORIMETRY_OPYCC_601] = HDMI_COLORIMETRY_OPYCC_601, 114 [DRM_MODE_COLORIMETRY_OPRGB] = HDMI_COLORIMETRY_OPRGB, 115 [DRM_MODE_COLORIMETRY_BT2020_CYCC] = HDMI_COLORIMETRY_BT2020_CYCC, 116 [DRM_MODE_COLORIMETRY_BT2020_RGB] = HDMI_COLORIMETRY_BT2020_RGB, 117 [DRM_MODE_COLORIMETRY_BT2020_YCC] = HDMI_COLORIMETRY_BT2020_YCC, 118 }; 119 120 #undef C 121 #undef EC 122 #undef ACE 123 124 /** 125 * drm_hdmi_avi_infoframe_colorimetry() - fill the HDMI AVI infoframe 126 * colorimetry information 127 * @frame: HDMI AVI infoframe 128 * @conn_state: connector state 129 */ 130 void drm_hdmi_avi_infoframe_colorimetry(struct hdmi_avi_infoframe *frame, 131 const struct drm_connector_state *conn_state) 132 { 133 u32 colorimetry_val; 134 u32 colorimetry_index = conn_state->colorspace & FULL_COLORIMETRY_MASK; 135 136 if (colorimetry_index >= ARRAY_SIZE(hdmi_colorimetry_val)) 137 colorimetry_val = HDMI_COLORIMETRY_NO_DATA; 138 else 139 colorimetry_val = hdmi_colorimetry_val[colorimetry_index]; 140 141 frame->colorimetry = colorimetry_val & NORMAL_COLORIMETRY_MASK; 142 /* 143 * ToDo: Extend it for ACE formats as well. Modify the infoframe 144 * structure and extend it in drivers/video/hdmi 145 */ 146 frame->extended_colorimetry = (colorimetry_val >> 2) & 147 EXTENDED_COLORIMETRY_MASK; 148 } 149 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_colorimetry); 150 151 /** 152 * drm_hdmi_avi_infoframe_bars() - fill the HDMI AVI infoframe 153 * bar information 154 * @frame: HDMI AVI infoframe 155 * @conn_state: connector state 156 */ 157 void drm_hdmi_avi_infoframe_bars(struct hdmi_avi_infoframe *frame, 158 const struct drm_connector_state *conn_state) 159 { 160 frame->right_bar = conn_state->tv.margins.right; 161 frame->left_bar = conn_state->tv.margins.left; 162 frame->top_bar = conn_state->tv.margins.top; 163 frame->bottom_bar = conn_state->tv.margins.bottom; 164 } 165 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_bars); 166 167 /** 168 * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe 169 * content type information, based 170 * on correspondent DRM property. 171 * @frame: HDMI AVI infoframe 172 * @conn_state: DRM display connector state 173 * 174 */ 175 void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, 176 const struct drm_connector_state *conn_state) 177 { 178 switch (conn_state->content_type) { 179 case DRM_MODE_CONTENT_TYPE_GRAPHICS: 180 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; 181 break; 182 case DRM_MODE_CONTENT_TYPE_CINEMA: 183 frame->content_type = HDMI_CONTENT_TYPE_CINEMA; 184 break; 185 case DRM_MODE_CONTENT_TYPE_GAME: 186 frame->content_type = HDMI_CONTENT_TYPE_GAME; 187 break; 188 case DRM_MODE_CONTENT_TYPE_PHOTO: 189 frame->content_type = HDMI_CONTENT_TYPE_PHOTO; 190 break; 191 default: 192 /* Graphics is the default(0) */ 193 frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; 194 } 195 196 frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; 197 } 198 EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); 199 200 /** 201 * drm_hdmi_compute_mode_clock() - Computes the TMDS Character Rate 202 * @mode: Display mode to compute the clock for 203 * @bpc: Bits per character 204 * @fmt: Output Pixel Format used 205 * 206 * Returns the TMDS Character Rate for a given mode, bpc count and output format. 207 * 208 * RETURNS: 209 * The TMDS Character Rate, in Hertz, or 0 on error. 210 */ 211 unsigned long long 212 drm_hdmi_compute_mode_clock(const struct drm_display_mode *mode, 213 unsigned int bpc, enum hdmi_colorspace fmt) 214 { 215 unsigned long long clock = mode->clock * 1000ULL; 216 unsigned int vic = drm_match_cea_mode(mode); 217 218 /* 219 * CTA-861-G Spec, section 5.4 - Color Coding and Quantization 220 * mandates that VIC 1 always uses 8 bpc. 221 */ 222 if (vic == 1 && bpc != 8) 223 return 0; 224 225 if (fmt == HDMI_COLORSPACE_YUV422) { 226 /* 227 * HDMI 1.0 Spec, section 6.5 - Pixel Encoding states that 228 * YUV422 sends 24 bits over three channels, with Cb and Cr 229 * components being sent on odd and even pixels, respectively. 230 * 231 * If fewer than 12 bpc are sent, data are left justified. 232 */ 233 if (bpc > 12) 234 return 0; 235 236 /* 237 * HDMI 1.0 Spec, section 6.5 - Pixel Encoding 238 * specifies that YUV422 sends two 12-bits components over 239 * three TMDS channels per pixel clock, which is equivalent to 240 * three 8-bits components over three channels used by RGB as 241 * far as the clock rate goes. 242 */ 243 bpc = 8; 244 } 245 246 /* 247 * HDMI 2.0 Spec, Section 7.1 - YCbCr 4:2:0 Pixel Encoding 248 * specifies that YUV420 encoding is carried at a TMDS Character Rate 249 * equal to half the pixel clock rate. 250 */ 251 if (fmt == HDMI_COLORSPACE_YUV420) 252 clock = clock / 2; 253 254 if (mode->flags & DRM_MODE_FLAG_DBLCLK) 255 clock = clock * 2; 256 257 return DIV_ROUND_CLOSEST_ULL(clock * bpc, 8); 258 } 259 EXPORT_SYMBOL(drm_hdmi_compute_mode_clock); 260 261 struct drm_hdmi_acr_n_cts_entry { 262 unsigned int n; 263 unsigned int cts; 264 }; 265 266 struct drm_hdmi_acr_data { 267 unsigned long tmds_clock_khz; 268 struct drm_hdmi_acr_n_cts_entry n_cts_32k, 269 n_cts_44k1, 270 n_cts_48k; 271 }; 272 273 static const struct drm_hdmi_acr_data hdmi_acr_n_cts[] = { 274 { 275 /* "Other" entry */ 276 .n_cts_32k = { .n = 4096, }, 277 .n_cts_44k1 = { .n = 6272, }, 278 .n_cts_48k = { .n = 6144, }, 279 }, { 280 .tmds_clock_khz = 25175, 281 .n_cts_32k = { .n = 4576, .cts = 28125, }, 282 .n_cts_44k1 = { .n = 7007, .cts = 31250, }, 283 .n_cts_48k = { .n = 6864, .cts = 28125, }, 284 }, { 285 .tmds_clock_khz = 25200, 286 .n_cts_32k = { .n = 4096, .cts = 25200, }, 287 .n_cts_44k1 = { .n = 6272, .cts = 28000, }, 288 .n_cts_48k = { .n = 6144, .cts = 25200, }, 289 }, { 290 .tmds_clock_khz = 27000, 291 .n_cts_32k = { .n = 4096, .cts = 27000, }, 292 .n_cts_44k1 = { .n = 6272, .cts = 30000, }, 293 .n_cts_48k = { .n = 6144, .cts = 27000, }, 294 }, { 295 .tmds_clock_khz = 27027, 296 .n_cts_32k = { .n = 4096, .cts = 27027, }, 297 .n_cts_44k1 = { .n = 6272, .cts = 30030, }, 298 .n_cts_48k = { .n = 6144, .cts = 27027, }, 299 }, { 300 .tmds_clock_khz = 54000, 301 .n_cts_32k = { .n = 4096, .cts = 54000, }, 302 .n_cts_44k1 = { .n = 6272, .cts = 60000, }, 303 .n_cts_48k = { .n = 6144, .cts = 54000, }, 304 }, { 305 .tmds_clock_khz = 54054, 306 .n_cts_32k = { .n = 4096, .cts = 54054, }, 307 .n_cts_44k1 = { .n = 6272, .cts = 60060, }, 308 .n_cts_48k = { .n = 6144, .cts = 54054, }, 309 }, { 310 .tmds_clock_khz = 74176, 311 .n_cts_32k = { .n = 11648, .cts = 210937, }, /* and 210938 */ 312 .n_cts_44k1 = { .n = 17836, .cts = 234375, }, 313 .n_cts_48k = { .n = 11648, .cts = 140625, }, 314 }, { 315 .tmds_clock_khz = 74250, 316 .n_cts_32k = { .n = 4096, .cts = 74250, }, 317 .n_cts_44k1 = { .n = 6272, .cts = 82500, }, 318 .n_cts_48k = { .n = 6144, .cts = 74250, }, 319 }, { 320 .tmds_clock_khz = 148352, 321 .n_cts_32k = { .n = 11648, .cts = 421875, }, 322 .n_cts_44k1 = { .n = 8918, .cts = 234375, }, 323 .n_cts_48k = { .n = 5824, .cts = 140625, }, 324 }, { 325 .tmds_clock_khz = 148500, 326 .n_cts_32k = { .n = 4096, .cts = 148500, }, 327 .n_cts_44k1 = { .n = 6272, .cts = 165000, }, 328 .n_cts_48k = { .n = 6144, .cts = 148500, }, 329 }, { 330 .tmds_clock_khz = 296703, 331 .n_cts_32k = { .n = 5824, .cts = 421875, }, 332 .n_cts_44k1 = { .n = 4459, .cts = 234375, }, 333 .n_cts_48k = { .n = 5824, .cts = 281250, }, 334 }, { 335 .tmds_clock_khz = 297000, 336 .n_cts_32k = { .n = 3072, .cts = 222750, }, 337 .n_cts_44k1 = { .n = 4704, .cts = 247500, }, 338 .n_cts_48k = { .n = 5120, .cts = 247500, }, 339 }, { 340 .tmds_clock_khz = 593407, 341 .n_cts_32k = { .n = 5824, .cts = 843750, }, 342 .n_cts_44k1 = { .n = 8918, .cts = 937500, }, 343 .n_cts_48k = { .n = 5824, .cts = 562500, }, 344 }, { 345 .tmds_clock_khz = 594000, 346 .n_cts_32k = { .n = 3072, .cts = 445500, }, 347 .n_cts_44k1 = { .n = 9408, .cts = 990000, }, 348 .n_cts_48k = { .n = 6144, .cts = 594000, }, 349 }, 350 }; 351 352 static int drm_hdmi_acr_find_tmds_entry(unsigned long tmds_clock_khz) 353 { 354 int i; 355 356 /* skip the "other" entry */ 357 for (i = 1; i < ARRAY_SIZE(hdmi_acr_n_cts); i++) { 358 if (hdmi_acr_n_cts[i].tmds_clock_khz == tmds_clock_khz) 359 return i; 360 } 361 362 return 0; 363 } 364 365 /** 366 * drm_hdmi_acr_get_n_cts() - get N and CTS values for Audio Clock Regeneration 367 * 368 * @tmds_char_rate: TMDS clock (char rate) as used by the HDMI connector 369 * @sample_rate: audio sample rate 370 * @out_n: a pointer to write the N value 371 * @out_cts: a pointer to write the CTS value 372 * 373 * Get the N and CTS values (either by calculating them or by returning data 374 * from the tables. This follows the HDMI 1.4b Section 7.2 "Audio Sample Clock 375 * Capture and Regeneration". 376 * 377 * Note, @sample_rate corresponds to the Fs value, see sections 7.2.4 - 7.2.6 378 * on how to select Fs for non-L-PCM formats. 379 */ 380 void 381 drm_hdmi_acr_get_n_cts(unsigned long long tmds_char_rate, 382 unsigned int sample_rate, 383 unsigned int *out_n, 384 unsigned int *out_cts) 385 { 386 /* be a bit more tolerant, especially for the 1.001 entries */ 387 unsigned long tmds_clock_khz = DIV_ROUND_CLOSEST_ULL(tmds_char_rate, 1000); 388 const struct drm_hdmi_acr_n_cts_entry *entry; 389 unsigned int n, cts, mult; 390 int tmds_idx; 391 392 tmds_idx = drm_hdmi_acr_find_tmds_entry(tmds_clock_khz); 393 394 /* 395 * Don't change the order, 192 kHz is divisible by 48k and 32k, but it 396 * should use 48k entry. 397 */ 398 if (sample_rate % 48000 == 0) { 399 entry = &hdmi_acr_n_cts[tmds_idx].n_cts_48k; 400 mult = sample_rate / 48000; 401 } else if (sample_rate % 44100 == 0) { 402 entry = &hdmi_acr_n_cts[tmds_idx].n_cts_44k1; 403 mult = sample_rate / 44100; 404 } else if (sample_rate % 32000 == 0) { 405 entry = &hdmi_acr_n_cts[tmds_idx].n_cts_32k; 406 mult = sample_rate / 32000; 407 } else { 408 entry = NULL; 409 } 410 411 if (entry) { 412 n = entry->n * mult; 413 cts = entry->cts; 414 } else { 415 /* Recommended optimal value, HDMI 1.4b, Section 7.2.1 */ 416 n = 128 * sample_rate / 1000; 417 cts = 0; 418 } 419 420 if (!cts) 421 cts = DIV_ROUND_CLOSEST_ULL(tmds_char_rate * n, 422 128 * sample_rate); 423 424 *out_n = n; 425 *out_cts = cts; 426 } 427 EXPORT_SYMBOL(drm_hdmi_acr_get_n_cts); 428