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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
30#include <linux/hdmi.h>
31
32#include <drm/drm_mode_object.h>
33#include <drm/drm_connector.h>
34
35struct 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 horizontal 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 */
91enum 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 * The horizontal and vertical timings are defined per the following diagram.
199 *
200 * ::
201 *
202 *
203 * Active Front Sync Back
204 * Region Porch Porch
205 * <-----------------------><----------------><-------------><-------------->
206 * //////////////////////|
207 * ////////////////////// |
208 * ////////////////////// |.................. ................
209 * _______________
210 * <----- [hv]display ----->
211 * <------------- [hv]sync_start ------------>
212 * <--------------------- [hv]sync_end --------------------->
213 * <-------------------------------- [hv]total ----------------------------->*
214 *
215 * This structure contains two copies of timings. First are the plain timings,
216 * which specify the logical mode, as it would be for a progressive 1:1 scanout
217 * at the refresh rate userspace can observe through vblank timestamps. Then
218 * there's the hardware timings, which are corrected for interlacing,
219 * double-clocking and similar things. They are provided as a convenience, and
220 * can be appropriately computed using drm_mode_set_crtcinfo().
221 *
222 * For printing you can use %DRM_MODE_FMT and DRM_MODE_ARG().
223 */
224struct drm_display_mode {
225 /**
226 * @head:
227 *
228 * struct list_head for mode lists.
229 */
230 struct list_head head;
231
232 /**
233 * @name:
234 *
235 * Human-readable name of the mode, filled out with drm_mode_set_name().
236 */
237 char name[DRM_DISPLAY_MODE_LEN];
238
239 /**
240 * @status:
241 *
242 * Status of the mode, used to filter out modes not supported by the
243 * hardware. See enum &drm_mode_status.
244 */
245 enum drm_mode_status status;
246
247 /**
248 * @type:
249 *
250 * A bitmask of flags, mostly about the source of a mode. Possible flags
251 * are:
252 *
253 * - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
254 * resolution of an LCD panel. There should only be one preferred
255 * mode per connector at any given time.
256 * - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
257 * them really. Drivers must set this bit for all modes they create
258 * and expose to userspace.
259 * - DRM_MODE_TYPE_USERDEF: Mode defined via kernel command line
260 *
261 * Plus a big list of flags which shouldn't be used at all, but are
262 * still around since these flags are also used in the userspace ABI.
263 * We no longer accept modes with these types though:
264 *
265 * - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, unused.
266 * Use DRM_MODE_TYPE_DRIVER instead.
267 * - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
268 * DRM_MODE_TYPE_PREFERRED instead.
269 * - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
270 * which are stuck around for hysterical raisins only. No one has an
271 * idea what they were meant for. Don't use.
272 */
273 unsigned int type;
274
275 /**
276 * @clock:
277 *
278 * Pixel clock in kHz.
279 */
280 int clock; /* in kHz */
281 int hdisplay;
282 int hsync_start;
283 int hsync_end;
284 int htotal;
285 int hskew;
286 int vdisplay;
287 int vsync_start;
288 int vsync_end;
289 int vtotal;
290 int vscan;
291 /**
292 * @flags:
293 *
294 * Sync and timing flags:
295 *
296 * - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
297 * - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
298 * - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
299 * - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
300 * - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
301 * - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
302 * - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
303 * - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
304 * - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
305 * - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
306 * - DRM_MODE_FLAG_BCAST: <deprecated>
307 * - DRM_MODE_FLAG_PIXMUX: <deprecated>
308 * - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
309 * - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
310 *
311 * Additionally there's flags to specify how 3D modes are packed:
312 *
313 * - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
314 * - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
315 * - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
316 * - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
317 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
318 * - DRM_MODE_FLAG_3D_L_DEPTH: ?
319 * - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
320 * - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
321 * parts.
322 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
323 * right parts.
324 */
325 unsigned int flags;
326
327 /**
328 * @width_mm:
329 *
330 * Addressable size of the output in mm, projectors should set this to
331 * 0.
332 */
333 int width_mm;
334
335 /**
336 * @height_mm:
337 *
338 * Addressable size of the output in mm, projectors should set this to
339 * 0.
340 */
341 int height_mm;
342
343 /**
344 * @crtc_clock:
345 *
346 * Actual pixel or dot clock in the hardware. This differs from the
347 * logical @clock when e.g. using interlacing, double-clocking, stereo
348 * modes or other fancy stuff that changes the timings and signals
349 * actually sent over the wire.
350 *
351 * This is again in kHz.
352 *
353 * Note that with digital outputs like HDMI or DP there's usually a
354 * massive confusion between the dot clock and the signal clock at the
355 * bit encoding level. Especially when a 8b/10b encoding is used and the
356 * difference is exactly a factor of 10.
357 */
358 int crtc_clock;
359 int crtc_hdisplay;
360 int crtc_hblank_start;
361 int crtc_hblank_end;
362 int crtc_hsync_start;
363 int crtc_hsync_end;
364 int crtc_htotal;
365 int crtc_hskew;
366 int crtc_vdisplay;
367 int crtc_vblank_start;
368 int crtc_vblank_end;
369 int crtc_vsync_start;
370 int crtc_vsync_end;
371 int crtc_vtotal;
372
373 /**
374 * @private:
375 *
376 * Pointer for driver private data. This can only be used for mode
377 * objects passed to drivers in modeset operations. It shouldn't be used
378 * by atomic drivers since they can store any additional data by
379 * subclassing state structures.
380 */
381 int *private;
382
383 /**
384 * @private_flags:
385 *
386 * Similar to @private, but just an integer.
387 */
388 int private_flags;
389
390 /**
391 * @vrefresh:
392 *
393 * Vertical refresh rate, for debug output in human readable form. Not
394 * used in a functional way.
395 *
396 * This value is in Hz.
397 */
398 int vrefresh;
399
400 /**
401 * @hsync:
402 *
403 * Horizontal refresh rate, for debug output in human readable form. Not
404 * used in a functional way.
405 *
406 * This value is in kHz.
407 */
408 int hsync;
409
410 /**
411 * @picture_aspect_ratio:
412 *
413 * Field for setting the HDMI picture aspect ratio of a mode.
414 */
415 enum hdmi_picture_aspect picture_aspect_ratio;
416
417 /**
418 * @export_head:
419 *
420 * struct list_head for modes to be exposed to the userspace.
421 * This is to maintain a list of exposed modes while preparing
422 * user-mode's list in drm_mode_getconnector ioctl. The purpose of this
423 * list_head only lies in the ioctl function, and is not expected to be
424 * used outside the function.
425 * Once used, the stale pointers are not reset, but left as it is, to
426 * avoid overhead of protecting it by mode_config.mutex.
427 */
428 struct list_head export_head;
429};
430
431/**
432 * DRM_MODE_FMT - printf string for &struct drm_display_mode
433 */
434#define DRM_MODE_FMT "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
435
436/**
437 * DRM_MODE_ARG - printf arguments for &struct drm_display_mode
438 * @m: display mode
439 */
440#define DRM_MODE_ARG(m) \
441 (m)->name, (m)->vrefresh, (m)->clock, \
442 (m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
443 (m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
444 (m)->type, (m)->flags
445
446#define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
447
448/**
449 * drm_mode_is_stereo - check for stereo mode flags
450 * @mode: drm_display_mode to check
451 *
452 * Returns:
453 * True if the mode is one of the stereo modes (like side-by-side), false if
454 * not.
455 */
456static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
457{
458 return mode->flags & DRM_MODE_FLAG_3D_MASK;
459}
460
461struct drm_connector;
462struct drm_cmdline_mode;
463
464struct drm_display_mode *drm_mode_create(struct drm_device *dev);
465void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
466void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
467 const struct drm_display_mode *in);
468int drm_mode_convert_umode(struct drm_device *dev,
469 struct drm_display_mode *out,
470 const struct drm_mode_modeinfo *in);
471void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
472void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
473bool drm_mode_is_420_only(const struct drm_display_info *display,
474 const struct drm_display_mode *mode);
475bool drm_mode_is_420_also(const struct drm_display_info *display,
476 const struct drm_display_mode *mode);
477bool drm_mode_is_420(const struct drm_display_info *display,
478 const struct drm_display_mode *mode);
479
480struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
481 int hdisplay, int vdisplay, int vrefresh,
482 bool reduced, bool interlaced,
483 bool margins);
484struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
485 int hdisplay, int vdisplay, int vrefresh,
486 bool interlaced, int margins);
487struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
488 int hdisplay, int vdisplay,
489 int vrefresh, bool interlaced,
490 int margins,
491 int GTF_M, int GTF_2C,
492 int GTF_K, int GTF_2J);
493void drm_display_mode_from_videomode(const struct videomode *vm,
494 struct drm_display_mode *dmode);
495void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
496 struct videomode *vm);
497void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
498int of_get_drm_display_mode(struct device_node *np,
499 struct drm_display_mode *dmode, u32 *bus_flags,
500 int index);
501
502void drm_mode_set_name(struct drm_display_mode *mode);
503int drm_mode_hsync(const struct drm_display_mode *mode);
504int drm_mode_vrefresh(const struct drm_display_mode *mode);
505void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
506 int *hdisplay, int *vdisplay);
507
508void drm_mode_set_crtcinfo(struct drm_display_mode *p,
509 int adjust_flags);
510void drm_mode_copy(struct drm_display_mode *dst,
511 const struct drm_display_mode *src);
512struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
513 const struct drm_display_mode *mode);
514bool drm_mode_match(const struct drm_display_mode *mode1,
515 const struct drm_display_mode *mode2,
516 unsigned int match_flags);
517bool drm_mode_equal(const struct drm_display_mode *mode1,
518 const struct drm_display_mode *mode2);
519bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
520 const struct drm_display_mode *mode2);
521bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
522 const struct drm_display_mode *mode2);
523
524/* for use by the crtc helper probe functions */
525enum drm_mode_status drm_mode_validate_driver(struct drm_device *dev,
526 const struct drm_display_mode *mode);
527enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
528 int maxX, int maxY);
529enum drm_mode_status
530drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
531 struct drm_connector *connector);
532void drm_mode_prune_invalid(struct drm_device *dev,
533 struct list_head *mode_list, bool verbose);
534void drm_mode_sort(struct list_head *mode_list);
535void drm_connector_list_update(struct drm_connector *connector);
536
537/* parsing cmdline modes */
538bool
539drm_mode_parse_command_line_for_connector(const char *mode_option,
540 const struct drm_connector *connector,
541 struct drm_cmdline_mode *mode);
542struct drm_display_mode *
543drm_mode_create_from_cmdline_mode(struct drm_device *dev,
544 struct drm_cmdline_mode *cmd);
545
546#endif /* __DRM_MODES_H__ */