drm_modes.h 18 KB

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