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_MODE_RES_MM - Calculates the display size from resolution and DPI
143  * @res: The resolution in pixel
144  * @dpi: The number of dots per inch
145  */
146 #define DRM_MODE_RES_MM(res, dpi)	\
147 	(((res) * 254ul) / ((dpi) * 10ul))
148 
149 #define __DRM_MODE_INIT(pix, hd, vd, hd_mm, vd_mm) \
150 	.type = DRM_MODE_TYPE_DRIVER, .clock = (pix), \
151 	.hdisplay = (hd), .hsync_start = (hd), .hsync_end = (hd), \
152 	.htotal = (hd), .vdisplay = (vd), .vsync_start = (vd), \
153 	.vsync_end = (vd), .vtotal = (vd), .width_mm = (hd_mm), \
154 	.height_mm = (vd_mm)
155 
156 /**
157  * DRM_MODE_INIT - Initialize display mode
158  * @hz: Vertical refresh rate in Hertz
159  * @hd: Horizontal resolution, width
160  * @vd: Vertical resolution, height
161  * @hd_mm: Display width in millimeters
162  * @vd_mm: Display height in millimeters
163  *
164  * This macro initializes a &drm_display_mode that contains information about
165  * refresh rate, resolution and physical size.
166  */
167 #define DRM_MODE_INIT(hz, hd, vd, hd_mm, vd_mm) \
168 	__DRM_MODE_INIT((hd) * (vd) * (hz) / 1000 /* kHz */, hd, vd, hd_mm, vd_mm)
169 
170 /**
171  * DRM_SIMPLE_MODE - Simple display mode
172  * @hd: Horizontal resolution, width
173  * @vd: Vertical resolution, height
174  * @hd_mm: Display width in millimeters
175  * @vd_mm: Display height in millimeters
176  *
177  * This macro initializes a &drm_display_mode that only contains info about
178  * resolution and physical size.
179  */
180 #define DRM_SIMPLE_MODE(hd, vd, hd_mm, vd_mm) \
181 	__DRM_MODE_INIT(1 /* pass validation */, hd, vd, hd_mm, vd_mm)
182 
183 #define CRTC_INTERLACE_HALVE_V	(1 << 0) /* halve V values for interlacing */
184 #define CRTC_STEREO_DOUBLE	(1 << 1) /* adjust timings for stereo modes */
185 #define CRTC_NO_DBLSCAN		(1 << 2) /* don't adjust doublescan */
186 #define CRTC_NO_VSCAN		(1 << 3) /* don't adjust doublescan */
187 #define CRTC_STEREO_DOUBLE_ONLY	(CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
188 
189 #define DRM_MODE_FLAG_3D_MAX	DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
190 
191 #define DRM_MODE_MATCH_TIMINGS (1 << 0)
192 #define DRM_MODE_MATCH_CLOCK (1 << 1)
193 #define DRM_MODE_MATCH_FLAGS (1 << 2)
194 #define DRM_MODE_MATCH_3D_FLAGS (1 << 3)
195 #define DRM_MODE_MATCH_ASPECT_RATIO (1 << 4)
196 
197 /**
198  * struct drm_display_mode - DRM kernel-internal display mode structure
199  * @hdisplay: horizontal display size
200  * @hsync_start: horizontal sync start
201  * @hsync_end: horizontal sync end
202  * @htotal: horizontal total size
203  * @hskew: horizontal skew?!
204  * @vdisplay: vertical display size
205  * @vsync_start: vertical sync start
206  * @vsync_end: vertical sync end
207  * @vtotal: vertical total size
208  * @vscan: vertical scan?!
209  * @crtc_hdisplay: hardware mode horizontal display size
210  * @crtc_hblank_start: hardware mode horizontal blank start
211  * @crtc_hblank_end: hardware mode horizontal blank end
212  * @crtc_hsync_start: hardware mode horizontal sync start
213  * @crtc_hsync_end: hardware mode horizontal sync end
214  * @crtc_htotal: hardware mode horizontal total size
215  * @crtc_hskew: hardware mode horizontal skew?!
216  * @crtc_vdisplay: hardware mode vertical display size
217  * @crtc_vblank_start: hardware mode vertical blank start
218  * @crtc_vblank_end: hardware mode vertical blank end
219  * @crtc_vsync_start: hardware mode vertical sync start
220  * @crtc_vsync_end: hardware mode vertical sync end
221  * @crtc_vtotal: hardware mode vertical total size
222  *
223  * This is the kernel API display mode information structure. For the
224  * user-space version see struct drm_mode_modeinfo.
225  *
226  * The horizontal and vertical timings are defined per the following diagram.
227  *
228  * ::
229  *
230  *
231  *               Active                 Front           Sync           Back
232  *              Region                 Porch                          Porch
233  *     <-----------------------><----------------><-------------><-------------->
234  *       //////////////////////|
235  *      ////////////////////// |
236  *     //////////////////////  |..................               ................
237  *                                                _______________
238  *     <----- [hv]display ----->
239  *     <------------- [hv]sync_start ------------>
240  *     <--------------------- [hv]sync_end --------------------->
241  *     <-------------------------------- [hv]total ----------------------------->*
242  *
243  * This structure contains two copies of timings. First are the plain timings,
244  * which specify the logical mode, as it would be for a progressive 1:1 scanout
245  * at the refresh rate userspace can observe through vblank timestamps. Then
246  * there's the hardware timings, which are corrected for interlacing,
247  * double-clocking and similar things. They are provided as a convenience, and
248  * can be appropriately computed using drm_mode_set_crtcinfo().
249  *
250  * For printing you can use %DRM_MODE_FMT and DRM_MODE_ARG().
251  */
252 struct drm_display_mode {
253 	/**
254 	 * @clock:
255 	 *
256 	 * Pixel clock in kHz.
257 	 */
258 	int clock;		/* in kHz */
259 	u16 hdisplay;
260 	u16 hsync_start;
261 	u16 hsync_end;
262 	u16 htotal;
263 	u16 hskew;
264 	u16 vdisplay;
265 	u16 vsync_start;
266 	u16 vsync_end;
267 	u16 vtotal;
268 	u16 vscan;
269 	/**
270 	 * @flags:
271 	 *
272 	 * Sync and timing flags:
273 	 *
274 	 *  - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
275 	 *  - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
276 	 *  - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
277 	 *  - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
278 	 *  - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
279 	 *  - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
280 	 *  - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
281 	 *  - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
282 	 *  - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
283 	 *  - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
284 	 *  - DRM_MODE_FLAG_BCAST: <deprecated>
285 	 *  - DRM_MODE_FLAG_PIXMUX: <deprecated>
286 	 *  - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
287 	 *  - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
288 	 *
289 	 * Additionally there's flags to specify how 3D modes are packed:
290 	 *
291 	 *  - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
292 	 *  - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
293 	 *  - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
294 	 *  - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
295 	 *  - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
296 	 *  - DRM_MODE_FLAG_3D_L_DEPTH: ?
297 	 *  - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
298 	 *  - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
299 	 *    parts.
300 	 *  - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
301 	 *    right parts.
302 	 */
303 	u32 flags;
304 
305 	/**
306 	 * @crtc_clock:
307 	 *
308 	 * Actual pixel or dot clock in the hardware. This differs from the
309 	 * logical @clock when e.g. using interlacing, double-clocking, stereo
310 	 * modes or other fancy stuff that changes the timings and signals
311 	 * actually sent over the wire.
312 	 *
313 	 * This is again in kHz.
314 	 *
315 	 * Note that with digital outputs like HDMI or DP there's usually a
316 	 * massive confusion between the dot clock and the signal clock at the
317 	 * bit encoding level. Especially when a 8b/10b encoding is used and the
318 	 * difference is exactly a factor of 10.
319 	 */
320 	int crtc_clock;
321 	u16 crtc_hdisplay;
322 	u16 crtc_hblank_start;
323 	u16 crtc_hblank_end;
324 	u16 crtc_hsync_start;
325 	u16 crtc_hsync_end;
326 	u16 crtc_htotal;
327 	u16 crtc_hskew;
328 	u16 crtc_vdisplay;
329 	u16 crtc_vblank_start;
330 	u16 crtc_vblank_end;
331 	u16 crtc_vsync_start;
332 	u16 crtc_vsync_end;
333 	u16 crtc_vtotal;
334 
335 	/**
336 	 * @width_mm:
337 	 *
338 	 * Addressable size of the output in mm, projectors should set this to
339 	 * 0.
340 	 */
341 	u16 width_mm;
342 
343 	/**
344 	 * @height_mm:
345 	 *
346 	 * Addressable size of the output in mm, projectors should set this to
347 	 * 0.
348 	 */
349 	u16 height_mm;
350 
351 	/**
352 	 * @type:
353 	 *
354 	 * A bitmask of flags, mostly about the source of a mode. Possible flags
355 	 * are:
356 	 *
357 	 *  - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
358 	 *    resolution of an LCD panel. There should only be one preferred
359 	 *    mode per connector at any given time.
360 	 *  - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
361 	 *    them really. Drivers must set this bit for all modes they create
362 	 *    and expose to userspace.
363 	 *  - DRM_MODE_TYPE_USERDEF: Mode defined or selected via the kernel
364 	 *    command line.
365 	 *
366 	 * Plus a big list of flags which shouldn't be used at all, but are
367 	 * still around since these flags are also used in the userspace ABI.
368 	 * We no longer accept modes with these types though:
369 	 *
370 	 *  - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, unused.
371 	 *    Use DRM_MODE_TYPE_DRIVER instead.
372 	 *  - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
373 	 *    DRM_MODE_TYPE_PREFERRED instead.
374 	 *  - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
375 	 *    which are stuck around for hysterical raisins only. No one has an
376 	 *    idea what they were meant for. Don't use.
377 	 */
378 	u8 type;
379 
380 	/**
381 	 * @expose_to_userspace:
382 	 *
383 	 * Indicates whether the mode is to be exposed to the userspace.
384 	 * This is to maintain a set of exposed modes while preparing
385 	 * user-mode's list in drm_mode_getconnector ioctl. The purpose of
386 	 * this only lies in the ioctl function, and is not to be used
387 	 * outside the function.
388 	 */
389 	bool expose_to_userspace;
390 
391 	/**
392 	 * @head:
393 	 *
394 	 * struct list_head for mode lists.
395 	 */
396 	struct list_head head;
397 
398 	/**
399 	 * @name:
400 	 *
401 	 * Human-readable name of the mode, filled out with drm_mode_set_name().
402 	 */
403 	char name[DRM_DISPLAY_MODE_LEN];
404 
405 	/**
406 	 * @status:
407 	 *
408 	 * Status of the mode, used to filter out modes not supported by the
409 	 * hardware. See enum &drm_mode_status.
410 	 */
411 	enum drm_mode_status status;
412 
413 	/**
414 	 * @picture_aspect_ratio:
415 	 *
416 	 * Field for setting the HDMI picture aspect ratio of a mode.
417 	 */
418 	enum hdmi_picture_aspect picture_aspect_ratio;
419 
420 };
421 
422 /**
423  * DRM_MODE_FMT - printf string for &struct drm_display_mode
424  */
425 #define DRM_MODE_FMT    "\"%s\": %d %d %d %d %d %d %d %d %d %d 0x%x 0x%x"
426 
427 /**
428  * DRM_MODE_ARG - printf arguments for &struct drm_display_mode
429  * @m: display mode
430  */
431 #define DRM_MODE_ARG(m) \
432 	(m)->name, drm_mode_vrefresh(m), (m)->clock, \
433 	(m)->hdisplay, (m)->hsync_start, (m)->hsync_end, (m)->htotal, \
434 	(m)->vdisplay, (m)->vsync_start, (m)->vsync_end, (m)->vtotal, \
435 	(m)->type, (m)->flags
436 
437 #define obj_to_mode(x) container_of(x, struct drm_display_mode, base)
438 
439 /**
440  * drm_mode_is_stereo - check for stereo mode flags
441  * @mode: drm_display_mode to check
442  *
443  * Returns:
444  * True if the mode is one of the stereo modes (like side-by-side), false if
445  * not.
446  */
drm_mode_is_stereo(const struct drm_display_mode * mode)447 static inline bool drm_mode_is_stereo(const struct drm_display_mode *mode)
448 {
449 	return mode->flags & DRM_MODE_FLAG_3D_MASK;
450 }
451 
452 struct drm_connector;
453 struct drm_cmdline_mode;
454 
455 struct drm_display_mode *drm_mode_create(struct drm_device *dev);
456 void drm_mode_destroy(struct drm_device *dev, struct drm_display_mode *mode);
457 void drm_mode_convert_to_umode(struct drm_mode_modeinfo *out,
458 			       const struct drm_display_mode *in);
459 int drm_mode_convert_umode(struct drm_device *dev,
460 			   struct drm_display_mode *out,
461 			   const struct drm_mode_modeinfo *in);
462 void drm_mode_probed_add(struct drm_connector *connector, struct drm_display_mode *mode);
463 void drm_mode_debug_printmodeline(const struct drm_display_mode *mode);
464 bool drm_mode_is_420_only(const struct drm_display_info *display,
465 			  const struct drm_display_mode *mode);
466 bool drm_mode_is_420_also(const struct drm_display_info *display,
467 			  const struct drm_display_mode *mode);
468 bool drm_mode_is_420(const struct drm_display_info *display,
469 		     const struct drm_display_mode *mode);
470 
471 struct drm_display_mode *drm_analog_tv_mode(struct drm_device *dev,
472 					    enum drm_connector_tv_mode mode,
473 					    unsigned long pixel_clock_hz,
474 					    unsigned int hdisplay,
475 					    unsigned int vdisplay,
476 					    bool interlace);
477 
drm_mode_analog_ntsc_480i(struct drm_device * dev)478 static inline struct drm_display_mode *drm_mode_analog_ntsc_480i(struct drm_device *dev)
479 {
480 	return drm_analog_tv_mode(dev, DRM_MODE_TV_MODE_NTSC, 13500000, 720, 480, true);
481 }
482 
drm_mode_analog_pal_576i(struct drm_device * dev)483 static inline struct drm_display_mode *drm_mode_analog_pal_576i(struct drm_device *dev)
484 {
485 	return drm_analog_tv_mode(dev, DRM_MODE_TV_MODE_PAL, 13500000, 720, 576, true);
486 }
487 
488 struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
489 				      int hdisplay, int vdisplay, int vrefresh,
490 				      bool reduced, bool interlaced,
491 				      bool margins);
492 struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
493 				      int hdisplay, int vdisplay, int vrefresh,
494 				      bool interlaced, int margins);
495 struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev,
496 					      int hdisplay, int vdisplay,
497 					      int vrefresh, bool interlaced,
498 					      int margins,
499 					      int GTF_M, int GTF_2C,
500 					      int GTF_K, int GTF_2J);
501 void drm_display_mode_from_videomode(const struct videomode *vm,
502 				     struct drm_display_mode *dmode);
503 void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,
504 				   struct videomode *vm);
505 void drm_bus_flags_from_videomode(const struct videomode *vm, u32 *bus_flags);
506 
507 #if defined(CONFIG_OF)
508 int of_get_drm_display_mode(struct device_node *np,
509 			    struct drm_display_mode *dmode, u32 *bus_flags,
510 			    int index);
511 int of_get_drm_panel_display_mode(struct device_node *np,
512 				  struct drm_display_mode *dmode, u32 *bus_flags);
513 #else
of_get_drm_display_mode(struct device_node * np,struct drm_display_mode * dmode,u32 * bus_flags,int index)514 static inline int of_get_drm_display_mode(struct device_node *np,
515 					  struct drm_display_mode *dmode,
516 					  u32 *bus_flags, int index)
517 {
518 	return -EINVAL;
519 }
520 
of_get_drm_panel_display_mode(struct device_node * np,struct drm_display_mode * dmode,u32 * bus_flags)521 static inline int of_get_drm_panel_display_mode(struct device_node *np,
522 						struct drm_display_mode *dmode, u32 *bus_flags)
523 {
524 	return -EINVAL;
525 }
526 #endif
527 
528 void drm_mode_set_name(struct drm_display_mode *mode);
529 int drm_mode_vrefresh(const struct drm_display_mode *mode);
530 void drm_mode_get_hv_timing(const struct drm_display_mode *mode,
531 			    int *hdisplay, int *vdisplay);
532 
533 void drm_mode_set_crtcinfo(struct drm_display_mode *p,
534 			   int adjust_flags);
535 void drm_mode_copy(struct drm_display_mode *dst,
536 		   const struct drm_display_mode *src);
537 void drm_mode_init(struct drm_display_mode *dst,
538 		   const struct drm_display_mode *src);
539 struct drm_display_mode *drm_mode_duplicate(struct drm_device *dev,
540 					    const struct drm_display_mode *mode);
541 bool drm_mode_match(const struct drm_display_mode *mode1,
542 		    const struct drm_display_mode *mode2,
543 		    unsigned int match_flags);
544 bool drm_mode_equal(const struct drm_display_mode *mode1,
545 		    const struct drm_display_mode *mode2);
546 bool drm_mode_equal_no_clocks(const struct drm_display_mode *mode1,
547 			      const struct drm_display_mode *mode2);
548 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode *mode1,
549 					const struct drm_display_mode *mode2);
550 
551 /* for use by the crtc helper probe functions */
552 enum drm_mode_status drm_mode_validate_driver(struct drm_device *dev,
553 					      const struct drm_display_mode *mode);
554 enum drm_mode_status drm_mode_validate_size(const struct drm_display_mode *mode,
555 					    int maxX, int maxY);
556 enum drm_mode_status
557 drm_mode_validate_ycbcr420(const struct drm_display_mode *mode,
558 			   struct drm_connector *connector);
559 void drm_mode_prune_invalid(struct drm_device *dev,
560 			    struct list_head *mode_list, bool verbose);
561 void drm_mode_sort(struct list_head *mode_list);
562 void drm_connector_list_update(struct drm_connector *connector);
563 
564 /* parsing cmdline modes */
565 bool
566 drm_mode_parse_command_line_for_connector(const char *mode_option,
567 					  const struct drm_connector *connector,
568 					  struct drm_cmdline_mode *mode);
569 struct drm_display_mode *
570 drm_mode_create_from_cmdline_mode(struct drm_device *dev,
571 				  struct drm_cmdline_mode *cmd);
572 
573 #endif /* __DRM_MODES_H__ */
574