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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_STALE: mode has become stale
84 * @MODE_BAD: unspecified reason
85 * @MODE_ERROR: error condition
86 *
87 * This enum is used to filter out modes not supported by the driver/hardware
88 * combination.
89 */
90enum drm_mode_status {
91 MODE_OK = 0,
92 MODE_HSYNC,
93 MODE_VSYNC,
94 MODE_H_ILLEGAL,
95 MODE_V_ILLEGAL,
96 MODE_BAD_WIDTH,
97 MODE_NOMODE,
98 MODE_NO_INTERLACE,
99 MODE_NO_DBLESCAN,
100 MODE_NO_VSCAN,
101 MODE_MEM,
102 MODE_VIRTUAL_X,
103 MODE_VIRTUAL_Y,
104 MODE_MEM_VIRT,
105 MODE_NOCLOCK,
106 MODE_CLOCK_HIGH,
107 MODE_CLOCK_LOW,
108 MODE_CLOCK_RANGE,
109 MODE_BAD_HVALUE,
110 MODE_BAD_VVALUE,
111 MODE_BAD_VSCAN,
112 MODE_HSYNC_NARROW,
113 MODE_HSYNC_WIDE,
114 MODE_HBLANK_NARROW,
115 MODE_HBLANK_WIDE,
116 MODE_VSYNC_NARROW,
117 MODE_VSYNC_WIDE,
118 MODE_VBLANK_NARROW,
119 MODE_VBLANK_WIDE,
120 MODE_PANEL,
121 MODE_INTERLACE_WIDTH,
122 MODE_ONE_WIDTH,
123 MODE_ONE_HEIGHT,
124 MODE_ONE_SIZE,
125 MODE_NO_REDUCED,
126 MODE_NO_STEREO,
127 MODE_STALE = -3,
128 MODE_BAD = -2,
129 MODE_ERROR = -1
130};
131
132#define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
133 DRM_MODE_TYPE_CRTC_C)
134
135#define DRM_MODE(nm, t, c, hd, hss, hse, ht, hsk, vd, vss, vse, vt, vs, f) \
136 .name = nm, .status = 0, .type = (t), .clock = (c), \
137 .hdisplay = (hd), .hsync_start = (hss), .hsync_end = (hse), \
138 .htotal = (ht), .hskew = (hsk), .vdisplay = (vd), \
139 .vsync_start = (vss), .vsync_end = (vse), .vtotal = (vt), \
140 .vscan = (vs), .flags = (f), \
141 .base.type = DRM_MODE_OBJECT_MODE
142
143#define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */
144#define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */
145#define CRTC_NO_DBLSCAN (1 << 2) /* don't adjust doublescan */
146#define CRTC_NO_VSCAN (1 << 3) /* don't adjust doublescan */
147#define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
148
149#define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
150
151/**
152 * struct drm_display_mode - DRM kernel-internal display mode structure
153 * @hdisplay: horizontal display size
154 * @hsync_start: horizontal sync start
155 * @hsync_end: horizontal sync end
156 * @htotal: horizontal total size
157 * @hskew: horizontal skew?!
158 * @vdisplay: vertical display size
159 * @vsync_start: vertical sync start
160 * @vsync_end: vertical sync end
161 * @vtotal: vertical total size
162 * @vscan: vertical scan?!
163 * @crtc_hdisplay: hardware mode horizontal display size
164 * @crtc_hblank_start: hardware mode horizontal blank start
165 * @crtc_hblank_end: hardware mode horizontal blank end
166 * @crtc_hsync_start: hardware mode horizontal sync start
167 * @crtc_hsync_end: hardware mode horizontal sync end
168 * @crtc_htotal: hardware mode horizontal total size
169 * @crtc_hskew: hardware mode horizontal skew?!
170 * @crtc_vdisplay: hardware mode vertical display size
171 * @crtc_vblank_start: hardware mode vertical blank start
172 * @crtc_vblank_end: hardware mode vertical blank end
173 * @crtc_vsync_start: hardware mode vertical sync start
174 * @crtc_vsync_end: hardware mode vertical sync end
175 * @crtc_vtotal: hardware mode vertical total size
176 *
177 * The horizontal and vertical timings are defined per the following diagram.
178 *
179 * ::
180 *
181 *
182 * Active Front Sync Back
183 * Region Porch Porch
184 * <-----------------------><----------------><-------------><-------------->
185 * //////////////////////|
186 * ////////////////////// |
187 * ////////////////////// |.................. ................
188 * _______________
189 * <----- [hv]display ----->
190 * <------------- [hv]sync_start ------------>
191 * <--------------------- [hv]sync_end --------------------->
192 * <-------------------------------- [hv]total ----------------------------->*
193 *
194 * This structure contains two copies of timings. First are the plain timings,
195 * which specify the logical mode, as it would be for a progressive 1:1 scanout
196 * at the refresh rate userspace can observe through vblank timestamps. Then
197 * there's the hardware timings, which are corrected for interlacing,
198 * double-clocking and similar things. They are provided as a convenience, and
199 * can be appropriately computed using drm_mode_set_crtcinfo().
200 */
201struct drm_display_mode {
202 /**
203 * @head:
204 *
205 * struct list_head for mode lists.
206 */
207 struct list_head head;
208
209 /**
210 * @base:
211 *
212 * A display mode is a normal modeset object, possibly including public
213 * userspace id.
214 *
215 * FIXME:
216 *
217 * This can probably be removed since the entire concept of userspace
218 * managing modes explicitly has never landed in upstream kernel mode
219 * setting support.
220 */
221 struct drm_mode_object base;
222
223 /**
224 * @name:
225 *
226 * Human-readable name of the mode, filled out with drm_mode_set_name().
227 */
228 char name[DRM_DISPLAY_MODE_LEN];
229
230 /**
231 * @status:
232 *
233 * Status of the mode, used to filter out modes not supported by the
234 * hardware. See enum &drm_mode_status.
235 */
236 enum drm_mode_status status;
237
238 /**
239 * @type:
240 *
241 * A bitmask of flags, mostly about the source of a mode. Possible flags
242 * are:
243 *
244 * - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively
245 * unused.
246 * - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
247 * resolution of an LCD panel. There should only be one preferred
248 * mode per connector at any given time.
249 * - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
250 * them really. Drivers must set this bit for all modes they create
251 * and expose to userspace.
252 *
253 * Plus a big list of flags which shouldn't be used at all, but are
254 * still around since these flags are also used in the userspace ABI:
255 *
256 * - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
257 * DRM_MODE_TYPE_PREFERRED instead.
258 * - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
259 * which are stuck around for hysterical raisins only. No one has an
260 * idea what they were meant for. Don't use.
261 * - DRM_MODE_TYPE_USERDEF: Mode defined by userspace, again a vestige
262 * from older kms designs where userspace had to first add a custom
263 * mode to the kernel's mode list before it could use it. Don't use.
264 */
265 unsigned int type;
266
267 /**
268 * @clock:
269 *
270 * Pixel clock in kHz.
271 */
272 int clock; /* in kHz */
273 int hdisplay;
274 int hsync_start;
275 int hsync_end;
276 int htotal;
277 int hskew;
278 int vdisplay;
279 int vsync_start;
280 int vsync_end;
281 int vtotal;
282 int vscan;
283 /**
284 * @flags:
285 *
286 * Sync and timing flags:
287 *
288 * - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
289 * - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
290 * - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
291 * - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
292 * - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
293 * - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
294 * - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
295 * - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
296 * - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
297 * - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
298 * - DRM_MODE_FLAG_BCAST: not used?
299 * - DRM_MODE_FLAG_PIXMUX: not used?
300 * - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
301 * - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
302 *
303 * Additionally there's flags to specify how 3D modes are packed:
304 *
305 * - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
306 * - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
307 * - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
308 * - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
309 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
310 * - DRM_MODE_FLAG_3D_L_DEPTH: ?
311 * - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
312 * - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
313 * parts.
314 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
315 * right parts.
316 */
317 unsigned int flags;
318
319 /**
320 * @width_mm:
321 *
322 * Addressable size of the output in mm, projectors should set this to
323 * 0.
324 */
325 int width_mm;
326
327 /**
328 * @height_mm:
329 *
330 * Addressable size of the output in mm, projectors should set this to
331 * 0.
332 */
333 int height_mm;
334
335 /**
336 * @crtc_clock:
337 *
338 * Actual pixel or dot clock in the hardware. This differs from the
339 * logical @clock when e.g. using interlacing, double-clocking, stereo
340 * modes or other fancy stuff that changes the timings and signals
341 * actually sent over the wire.
342 *
343 * This is again in kHz.
344 *
345 * Note that with digital outputs like HDMI or DP there's usually a
346 * massive confusion between the dot clock and the signal clock at the
347 * bit encoding level. Especially when a 8b/10b encoding is used and the
348 * difference is exactly a factor of 10.
349 */
350 int crtc_clock;
351 int crtc_hdisplay;
352 int crtc_hblank_start;
353 int crtc_hblank_end;
354 int crtc_hsync_start;
355 int crtc_hsync_end;
356 int crtc_htotal;
357 int crtc_hskew;
358 int crtc_vdisplay;
359 int crtc_vblank_start;
360 int crtc_vblank_end;
361 int crtc_vsync_start;
362 int crtc_vsync_end;
363 int crtc_vtotal;
364
365 /**
366 * @private:
367 *
368 * Pointer for driver private data. This can only be used for mode
369 * objects passed to drivers in modeset operations. It shouldn't be used
370 * by atomic drivers since they can store any additional data by
371 * subclassing state structures.
372 */
373 int *private;
374
375 /**
376 * @private_flags:
377 *
378 * Similar to @private, but just an integer.
379 */
380 int private_flags;
381
382 /**
383 * @vrefresh:
384 *
385 * Vertical refresh rate, for debug output in human readable form. Not
386 * used in a functional way.
387 *
388 * This value is in Hz.
389 */
390 int vrefresh;
391
392 /**
393 * @hsync:
394 *
395 * Horizontal refresh rate, for debug output in human readable form. Not
396 * used in a functional way.
397 *
398 * This value is in kHz.
399 */
400 int hsync;
401
402 /**
403 * @picture_aspect_ratio:
404 *
405 * Field for setting the HDMI picture aspect ratio of a mode.
406 */
407 enum hdmi_picture_aspect picture_aspect_ratio;
408};
409
410#define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
411
412/**
413 * drm_mode_is_stereo - check for stereo mode flags
414 * @mode: drm_display_mode to check
415 *
416 * Returns:
417 * True if the mode is one of the stereo modes (like side-by-side), false if
418 * not.
419 */
420static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
421{
422 return mode->flags & DRM_MODE_FLAG_3D_MASK;
423}
424
425struct drm_connector;
426struct drm_cmdline_mode;
427
428struct drm_display_mode *drm_mode_create(struct drm_device *dev);
429void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
430void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
431 const struct drm_display_mode *in);
432int drm_mode_convert_umode(struct drm_display_mode *out,
433 const struct drm_mode_modeinfo *in);
434void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
435void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
436
437struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
438 int hdisplay, int vdisplay, int vrefresh,
439 bool reduced, bool interlaced,
440 bool margins);
441struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
442 int hdisplay, int vdisplay, int vrefresh,
443 bool interlaced, int margins);
444struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
445 int hdisplay, int vdisplay,
446 int vrefresh, bool interlaced,
447 int margins,
448 int GTF_M, int GTF_2C,
449 int GTF_K, int GTF_2J);
450void drm_display_mode_from_videomode(const struct videomode *vm,
451 struct drm_display_mode *dmode);
452void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
453 struct videomode *vm);
454void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
455int of_get_drm_display_mode(struct device_node *np,
456 struct drm_display_mode *dmode, u32 *bus_flags,
457 int index);
458
459void drm_mode_set_name(struct drm_display_mode *mode);
460int drm_mode_hsync(const struct drm_display_mode *mode);
461int drm_mode_vrefresh(const struct drm_display_mode *mode);
462
463void drm_mode_set_crtcinfo(struct drm_display_mode *p,
464 int adjust_flags);
465void drm_mode_copy(struct drm_display_mode *dst,
466 const struct drm_display_mode *src);
467struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
468 const struct drm_display_mode *mode);
469bool drm_mode_equal(const struct drm_display_mode *mode1,
470 const struct drm_display_mode *mode2);
471bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
472 const struct drm_display_mode *mode2);
473bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
474 const struct drm_display_mode *mode2);
475
476/* for use by the crtc helper probe functions */
477enum drm_mode_status drm_mode_validate_basic(const struct drm_display_mode *mode);
478enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
479 int maxX, int maxY);
480void drm_mode_prune_invalid(struct drm_device *dev,
481 struct list_head *mode_list, bool verbose);
482void drm_mode_sort(struct list_head *mode_list);
483void drm_mode_connector_list_update(struct drm_connector *connector);
484
485/* parsing cmdline modes */
486bool
487drm_mode_parse_command_line_for_connector(const char *mode_option,
488 struct drm_connector *connector,
489 struct drm_cmdline_mode *mode);
490struct drm_display_mode *
491drm_mode_create_from_cmdline_mode(struct drm_device *dev,
492 struct drm_cmdline_mode *cmd);
493
494#endif /* __DRM_MODES_H__ */