1 /* 2 * Copyright © 2006 Keith Packard 3 * Copyright © 2007-2008 Dave Airlie 4 * Copyright © 2007-2008 Intel Corporation 5 * Jesse Barnes <jesse.barnes@intel.com> 6 * Copyright © 2014 Intel Corporation 7 * Daniel Vetter <daniel.vetter@ffwll.ch> 8 * 9 * Permission is hereby granted, free of charge, to any person obtaining a 10 * copy of this software and associated documentation files (the "Software"), 11 * to deal in the Software without restriction, including without limitation 12 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 13 * and/or sell copies of the Software, and to permit persons to whom the 14 * Software is furnished to do so, subject to the following conditions: 15 * 16 * The above copyright notice and this permission notice shall be included in 17 * all copies or substantial portions of the Software. 18 * 19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 22 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 * OTHER DEALINGS IN THE SOFTWARE. 26 */ 27 #ifndef __DRM_MODES_H__ 28 #define __DRM_MODES_H__ 29 30 #include <linux/hdmi.h> 31 32 #include <drm/drm_mode_object.h> 33 #include <drm/drm_connector.h> 34 35 struct videomode; 36 37 /* 38 * Note on terminology: here, for brevity and convenience, we refer to connector 39 * control chips as 'CRTCs'. They can control any type of connector, VGA, LVDS, 40 * DVI, etc. And 'screen' refers to the whole of the visible display, which 41 * may span multiple monitors (and therefore multiple CRTC and connector 42 * structures). 43 */ 44 45 /** 46 * enum drm_mode_status - hardware support status of a mode 47 * @MODE_OK: Mode OK 48 * @MODE_HSYNC: hsync out of range 49 * @MODE_VSYNC: vsync out of range 50 * @MODE_H_ILLEGAL: mode has illegal horizontal timings 51 * @MODE_V_ILLEGAL: mode has illegal vertical timings 52 * @MODE_BAD_WIDTH: requires an unsupported linepitch 53 * @MODE_NOMODE: no mode with a matching name 54 * @MODE_NO_INTERLACE: interlaced mode not supported 55 * @MODE_NO_DBLESCAN: doublescan mode not supported 56 * @MODE_NO_VSCAN: multiscan mode not supported 57 * @MODE_MEM: insufficient video memory 58 * @MODE_VIRTUAL_X: mode width too large for specified virtual size 59 * @MODE_VIRTUAL_Y: mode height too large for specified virtual size 60 * @MODE_MEM_VIRT: insufficient video memory given virtual size 61 * @MODE_NOCLOCK: no fixed clock available 62 * @MODE_CLOCK_HIGH: clock required is too high 63 * @MODE_CLOCK_LOW: clock required is too low 64 * @MODE_CLOCK_RANGE: clock/mode isn't in a ClockRange 65 * @MODE_BAD_HVALUE: horizontal timing was out of range 66 * @MODE_BAD_VVALUE: vertical timing was out of range 67 * @MODE_BAD_VSCAN: VScan value out of range 68 * @MODE_HSYNC_NARROW: horizontal sync too narrow 69 * @MODE_HSYNC_WIDE: horizontal sync too wide 70 * @MODE_HBLANK_NARROW: horizontal blanking too narrow 71 * @MODE_HBLANK_WIDE: horizontal blanking too wide 72 * @MODE_VSYNC_NARROW: vertical sync too narrow 73 * @MODE_VSYNC_WIDE: vertical sync too wide 74 * @MODE_VBLANK_NARROW: vertical blanking too narrow 75 * @MODE_VBLANK_WIDE: vertical blanking too wide 76 * @MODE_PANEL: exceeds panel dimensions 77 * @MODE_INTERLACE_WIDTH: width too large for interlaced mode 78 * @MODE_ONE_WIDTH: only one width is supported 79 * @MODE_ONE_HEIGHT: only one height is supported 80 * @MODE_ONE_SIZE: only one resolution is supported 81 * @MODE_NO_REDUCED: monitor doesn't accept reduced blanking 82 * @MODE_NO_STEREO: stereo modes not supported 83 * @MODE_NO_420: ycbcr 420 modes not supported 84 * @MODE_STALE: mode has become stale 85 * @MODE_BAD: unspecified reason 86 * @MODE_ERROR: error condition 87 * 88 * This enum is used to filter out modes not supported by the driver/hardware 89 * combination. 90 */ 91 enum drm_mode_status { 92 MODE_OK = 0, 93 MODE_HSYNC, 94 MODE_VSYNC, 95 MODE_H_ILLEGAL, 96 MODE_V_ILLEGAL, 97 MODE_BAD_WIDTH, 98 MODE_NOMODE, 99 MODE_NO_INTERLACE, 100 MODE_NO_DBLESCAN, 101 MODE_NO_VSCAN, 102 MODE_MEM, 103 MODE_VIRTUAL_X, 104 MODE_VIRTUAL_Y, 105 MODE_MEM_VIRT, 106 MODE_NOCLOCK, 107 MODE_CLOCK_HIGH, 108 MODE_CLOCK_LOW, 109 MODE_CLOCK_RANGE, 110 MODE_BAD_HVALUE, 111 MODE_BAD_VVALUE, 112 MODE_BAD_VSCAN, 113 MODE_HSYNC_NARROW, 114 MODE_HSYNC_WIDE, 115 MODE_HBLANK_NARROW, 116 MODE_HBLANK_WIDE, 117 MODE_VSYNC_NARROW, 118 MODE_VSYNC_WIDE, 119 MODE_VBLANK_NARROW, 120 MODE_VBLANK_WIDE, 121 MODE_PANEL, 122 MODE_INTERLACE_WIDTH, 123 MODE_ONE_WIDTH, 124 MODE_ONE_HEIGHT, 125 MODE_ONE_SIZE, 126 MODE_NO_REDUCED, 127 MODE_NO_STEREO, 128 MODE_NO_420, 129 MODE_STALE = -3, 130 MODE_BAD = -2, 131 MODE_ERROR = -1 132 }; 133 134 #define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \ 135 .name = nm, .status = 0, .type = (t), .clock = (c), \ 136 .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \ 137 .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \ 138 .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \ 139 .vscan = (vs), .flags = (f) 140 141 /** 142 * DRM_SIMPLE_MODE - Simple display mode 143 * @hd: Horizontal resolution, width 144 * @vd: Vertical resolution, height 145 * @hd_mm: Display width in millimeters 146 * @vd_mm: Display height in millimeters 147 * 148 * This macro initializes a &drm_display_mode that only contains info about 149 * resolution and physical size. 150 */ 151 #define DRM_SIMPLE_MODE(hd, vd, hd_mm, vd_mm) \ 152 .type = DRM_MODE_TYPE_DRIVER, .clock = 1 /* pass validation */, \ 153 .hdisplay = (hd), .hsync_start = (hd), .hsync_end = (hd), \ 154 .htotal = (hd), .vdisplay = (vd), .vsync_start = (vd), \ 155 .vsync_end = (vd), .vtotal = (vd), .width_mm = (hd_mm), \ 156 .height_mm = (vd_mm) 157 158 #define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */ 159 #define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */ 160 #define CRTC_NO_DBLSCAN (1 << 2) /* don't adjust doublescan */ 161 #define CRTC_NO_VSCAN (1 << 3) /* don't adjust doublescan */ 162 #define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN) 163 164 #define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF 165 166 #define DRM_MODE_MATCH_TIMINGS (1 << 0) 167 #define DRM_MODE_MATCH_CLOCK (1 << 1) 168 #define DRM_MODE_MATCH_FLAGS (1 << 2) 169 #define DRM_MODE_MATCH_3D_FLAGS (1 << 3) 170 #define DRM_MODE_MATCH_ASPECT_RATIO (1 << 4) 171 172 /** 173 * struct drm_display_mode - DRM kernel-internal display mode structure 174 * @hdisplay: horizontal display size 175 * @hsync_start: horizontal sync start 176 * @hsync_end: horizontal sync end 177 * @htotal: horizontal total size 178 * @hskew: horizontal skew?! 179 * @vdisplay: vertical display size 180 * @vsync_start: vertical sync start 181 * @vsync_end: vertical sync end 182 * @vtotal: vertical total size 183 * @vscan: vertical scan?! 184 * @crtc_hdisplay: hardware mode horizontal display size 185 * @crtc_hblank_start: hardware mode horizontal blank start 186 * @crtc_hblank_end: hardware mode horizontal blank end 187 * @crtc_hsync_start: hardware mode horizontal sync start 188 * @crtc_hsync_end: hardware mode horizontal sync end 189 * @crtc_htotal: hardware mode horizontal total size 190 * @crtc_hskew: hardware mode horizontal skew?! 191 * @crtc_vdisplay: hardware mode vertical display size 192 * @crtc_vblank_start: hardware mode vertical blank start 193 * @crtc_vblank_end: hardware mode vertical blank end 194 * @crtc_vsync_start: hardware mode vertical sync start 195 * @crtc_vsync_end: hardware mode vertical sync end 196 * @crtc_vtotal: hardware mode vertical total size 197 * 198 * This is the kernel API display mode information structure. For the 199 * user-space version see struct drm_mode_modeinfo. 200 * 201 * The horizontal and vertical timings are defined per the following diagram. 202 * 203 * :: 204 * 205 * 206 * Active Front Sync Back 207 * Region Porch Porch 208 * <-----------------------><----------------><-------------><--------------> 209 * //////////////////////| 210 * ////////////////////// | 211 * ////////////////////// |.................. ................ 212 * _______________ 213 * <----- [hv]display -----> 214 * <------------- [hv]sync_start ------------> 215 * <--------------------- [hv]sync_end ---------------------> 216 * <-------------------------------- [hv]total ----------------------------->* 217 * 218 * This structure contains two copies of timings. First are the plain timings, 219 * which specify the logical mode, as it would be for a progressive 1:1 scanout 220 * at the refresh rate userspace can observe through vblank timestamps. Then 221 * there's the hardware timings, which are corrected for interlacing, 222 * double-clocking and similar things. They are provided as a convenience, and 223 * can be appropriately computed using drm_mode_set_crtcinfo(). 224 * 225 * For printing you can use %DRM_MODE_FMT and DRM_MODE_ARG(). 226 */ 227 struct drm_display_mode { 228 /** 229 * @clock: 230 * 231 * Pixel clock in kHz. 232 */ 233 int clock; /* in kHz */ 234 u16 hdisplay; 235 u16 hsync_start; 236 u16 hsync_end; 237 u16 htotal; 238 u16 hskew; 239 u16 vdisplay; 240 u16 vsync_start; 241 u16 vsync_end; 242 u16 vtotal; 243 u16 vscan; 244 /** 245 * @flags: 246 * 247 * Sync and timing flags: 248 * 249 * - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high. 250 * - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low. 251 * - DRM_MODE_FLAG_PVSYNC: vertical sync is active high. 252 * - DRM_MODE_FLAG_NVSYNC: vertical sync is active low. 253 * - DRM_MODE_FLAG_INTERLACE: mode is interlaced. 254 * - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan. 255 * - DRM_MODE_FLAG_CSYNC: mode uses composite sync. 256 * - DRM_MODE_FLAG_PCSYNC: composite sync is active high. 257 * - DRM_MODE_FLAG_NCSYNC: composite sync is active low. 258 * - DRM_MODE_FLAG_HSKEW: hskew provided (not used?). 259 * - DRM_MODE_FLAG_BCAST: <deprecated> 260 * - DRM_MODE_FLAG_PIXMUX: <deprecated> 261 * - DRM_MODE_FLAG_DBLCLK: double-clocked mode. 262 * - DRM_MODE_FLAG_CLKDIV2: half-clocked mode. 263 * 264 * Additionally there's flags to specify how 3D modes are packed: 265 * 266 * - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode. 267 * - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right. 268 * - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields. 269 * - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines. 270 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames. 271 * - DRM_MODE_FLAG_3D_L_DEPTH: ? 272 * - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ? 273 * - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom 274 * parts. 275 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and 276 * right parts. 277 */ 278 u32 flags; 279 280 /** 281 * @crtc_clock: 282 * 283 * Actual pixel or dot clock in the hardware. This differs from the 284 * logical @clock when e.g. using interlacing, double-clocking, stereo 285 * modes or other fancy stuff that changes the timings and signals 286 * actually sent over the wire. 287 * 288 * This is again in kHz. 289 * 290 * Note that with digital outputs like HDMI or DP there's usually a 291 * massive confusion between the dot clock and the signal clock at the 292 * bit encoding level. Especially when a 8b/10b encoding is used and the 293 * difference is exactly a factor of 10. 294 */ 295 int crtc_clock; 296 u16 crtc_hdisplay; 297 u16 crtc_hblank_start; 298 u16 crtc_hblank_end; 299 u16 crtc_hsync_start; 300 u16 crtc_hsync_end; 301 u16 crtc_htotal; 302 u16 crtc_hskew; 303 u16 crtc_vdisplay; 304 u16 crtc_vblank_start; 305 u16 crtc_vblank_end; 306 u16 crtc_vsync_start; 307 u16 crtc_vsync_end; 308 u16 crtc_vtotal; 309 310 /** 311 * @width_mm: 312 * 313 * Addressable size of the output in mm, projectors should set this to 314 * 0. 315 */ 316 u16 width_mm; 317 318 /** 319 * @height_mm: 320 * 321 * Addressable size of the output in mm, projectors should set this to 322 * 0. 323 */ 324 u16 height_mm; 325 326 /** 327 * @type: 328 * 329 * A bitmask of flags, mostly about the source of a mode. Possible flags 330 * are: 331 * 332 * - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native 333 * resolution of an LCD panel. There should only be one preferred 334 * mode per connector at any given time. 335 * - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of 336 * them really. Drivers must set this bit for all modes they create 337 * and expose to userspace. 338 * - DRM_MODE_TYPE_USERDEF: Mode defined or selected via the kernel 339 * command line. 340 * 341 * Plus a big list of flags which shouldn't be used at all, but are 342 * still around since these flags are also used in the userspace ABI. 343 * We no longer accept modes with these types though: 344 * 345 * - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, unused. 346 * Use DRM_MODE_TYPE_DRIVER instead. 347 * - DRM_MODE_TYPE_DEFAULT: Again a leftover, use 348 * DRM_MODE_TYPE_PREFERRED instead. 349 * - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers 350 * which are stuck around for hysterical raisins only. No one has an 351 * idea what they were meant for. Don't use. 352 */ 353 u8 type; 354 355 /** 356 * @expose_to_userspace: 357 * 358 * Indicates whether the mode is to be exposed to the userspace. 359 * This is to maintain a set of exposed modes while preparing 360 * user-mode's list in drm_mode_getconnector ioctl. The purpose of 361 * this only lies in the ioctl function, and is not to be used 362 * outside the function. 363 */ 364 bool expose_to_userspace; 365 366 /** 367 * @head: 368 * 369 * struct list_head for mode lists. 370 */ 371 struct list_head head; 372 373 /** 374 * @name: 375 * 376 * Human-readable name of the mode, filled out with drm_mode_set_name(). 377 */ 378 char name[DRM_DISPLAY_MODE_LEN]; 379 380 /** 381 * @status: 382 * 383 * Status of the mode, used to filter out modes not supported by the 384 * hardware. See enum &drm_mode_status. 385 */ 386 enum drm_mode_status status; 387 388 /** 389 * @picture_aspect_ratio: 390 * 391 * Field for setting the HDMI picture aspect ratio of a mode. 392 */ 393 enum hdmi_picture_aspect picture_aspect_ratio; 394 395 }; 396 397 /** 398 * DRM_MODE_FMT - printf string for &struct drm_display_mode 399 */ 400 #define DRM_MODE_FMT "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x" 401 402 /** 403 * DRM_MODE_ARG - printf arguments for &struct drm_display_mode 404 * @m: display mode 405 */ 406 #define DRM_MODE_ARG(m) \ 407 (m)->name, drm_mode_vrefresh(m), (m)->clock, \ 408 (m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \ 409 (m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \ 410 (m)->type, (m)->flags 411 412 #define obj_to_mode(x) container_of(x, struct drm_display_mode, base) 413 414 /** 415 * drm_mode_is_stereo - check for stereo mode flags 416 * @mode: drm_display_mode to check 417 * 418 * Returns: 419 * True if the mode is one of the stereo modes (like side-by-side), false if 420 * not. 421 */ 422 static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode) 423 { 424 return mode->flags & DRM_MODE_FLAG_3D_MASK; 425 } 426 427 struct drm_connector; 428 struct drm_cmdline_mode; 429 430 struct drm_display_mode *drm_mode_create(struct drm_device *dev); 431 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode); 432 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out, 433 const struct drm_display_mode *in); 434 int drm_mode_convert_umode(struct drm_device *dev, 435 struct drm_display_mode *out, 436 const struct drm_mode_modeinfo *in); 437 void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode); 438 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode); 439 bool drm_mode_is_420_only(const struct drm_display_info *display, 440 const struct drm_display_mode *mode); 441 bool drm_mode_is_420_also(const struct drm_display_info *display, 442 const struct drm_display_mode *mode); 443 bool drm_mode_is_420(const struct drm_display_info *display, 444 const struct drm_display_mode *mode); 445 446 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, 447 int hdisplay, int vdisplay, int vrefresh, 448 bool reduced, bool interlaced, 449 bool margins); 450 struct drm_display_mode *drm_gtf_mode(struct drm_device *dev, 451 int hdisplay, int vdisplay, int vrefresh, 452 bool interlaced, int margins); 453 struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev, 454 int hdisplay, int vdisplay, 455 int vrefresh, bool interlaced, 456 int margins, 457 int GTF_M, int GTF_2C, 458 int GTF_K, int GTF_2J); 459 void drm_display_mode_from_videomode(const struct videomode *vm, 460 struct drm_display_mode *dmode); 461 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode, 462 struct videomode *vm); 463 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags); 464 465 #if defined(CONFIG_OF) 466 int of_get_drm_display_mode(struct device_node *np, 467 struct drm_display_mode *dmode, u32 *bus_flags, 468 int index); 469 #else 470 static inline int of_get_drm_display_mode(struct device_node *np, 471 struct drm_display_mode *dmode, 472 u32 *bus_flags, int index) 473 { 474 return -EINVAL; 475 } 476 #endif 477 478 void drm_mode_set_name(struct drm_display_mode *mode); 479 int drm_mode_vrefresh(const struct drm_display_mode *mode); 480 void drm_mode_get_hv_timing(const struct drm_display_mode *mode, 481 int *hdisplay, int *vdisplay); 482 483 void drm_mode_set_crtcinfo(struct drm_display_mode *p, 484 int adjust_flags); 485 void drm_mode_copy(struct drm_display_mode *dst, 486 const struct drm_display_mode *src); 487 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev, 488 const struct drm_display_mode *mode); 489 bool drm_mode_match(const struct drm_display_mode *mode1, 490 const struct drm_display_mode *mode2, 491 unsigned int match_flags); 492 bool drm_mode_equal(const struct drm_display_mode *mode1, 493 const struct drm_display_mode *mode2); 494 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1, 495 const struct drm_display_mode *mode2); 496 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1, 497 const struct drm_display_mode *mode2); 498 499 /* for use by the crtc helper probe functions */ 500 enum drm_mode_status drm_mode_validate_driver(struct drm_device *dev, 501 const struct drm_display_mode *mode); 502 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode, 503 int maxX, int maxY); 504 enum drm_mode_status 505 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode, 506 struct drm_connector *connector); 507 void drm_mode_prune_invalid(struct drm_device *dev, 508 struct list_head *mode_list, bool verbose); 509 void drm_mode_sort(struct list_head *mode_list); 510 void drm_connector_list_update(struct drm_connector *connector); 511 512 /* parsing cmdline modes */ 513 bool 514 drm_mode_parse_command_line_for_connector(const char *mode_option, 515 const struct drm_connector *connector, 516 struct drm_cmdline_mode *mode); 517 struct drm_display_mode * 518 drm_mode_create_from_cmdline_mode(struct drm_device *dev, 519 struct drm_cmdline_mode *cmd); 520 521 #endif /* __DRM_MODES_H__ */ 522