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>
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:
16 * The above copyright notice and this permission notice shall be included in
17 * all copies or substantial portions of the Software.
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.
27 #ifndef __DRM_MODES_H__
28 #define __DRM_MODES_H__
31 * Note on terminology: here, for brevity and convenience, we refer to connector
32 * control chips as 'CRTCs'. They can control any type of connector, VGA, LVDS,
33 * DVI, etc. And 'screen' refers to the whole of the visible display, which
34 * may span multiple monitors (and therefore multiple CRTC and connector
39 * enum drm_mode_status - hardware support status of a mode
41 * @MODE_HSYNC: hsync out of range
42 * @MODE_VSYNC: vsync out of range
43 * @MODE_H_ILLEGAL: mode has illegal horizontal timings
44 * @MODE_V_ILLEGAL: mode has illegal horizontal timings
45 * @MODE_BAD_WIDTH: requires an unsupported linepitch
46 * @MODE_NOMODE: no mode with a matching name
47 * @MODE_NO_INTERLACE: interlaced mode not supported
48 * @MODE_NO_DBLESCAN: doublescan mode not supported
49 * @MODE_NO_VSCAN: multiscan mode not supported
50 * @MODE_MEM: insufficient video memory
51 * @MODE_VIRTUAL_X: mode width too large for specified virtual size
52 * @MODE_VIRTUAL_Y: mode height too large for specified virtual size
53 * @MODE_MEM_VIRT: insufficient video memory given virtual size
54 * @MODE_NOCLOCK: no fixed clock available
55 * @MODE_CLOCK_HIGH: clock required is too high
56 * @MODE_CLOCK_LOW: clock required is too low
57 * @MODE_CLOCK_RANGE: clock/mode isn't in a ClockRange
58 * @MODE_BAD_HVALUE: horizontal timing was out of range
59 * @MODE_BAD_VVALUE: vertical timing was out of range
60 * @MODE_BAD_VSCAN: VScan value out of range
61 * @MODE_HSYNC_NARROW: horizontal sync too narrow
62 * @MODE_HSYNC_WIDE: horizontal sync too wide
63 * @MODE_HBLANK_NARROW: horizontal blanking too narrow
64 * @MODE_HBLANK_WIDE: horizontal blanking too wide
65 * @MODE_VSYNC_NARROW: vertical sync too narrow
66 * @MODE_VSYNC_WIDE: vertical sync too wide
67 * @MODE_VBLANK_NARROW: vertical blanking too narrow
68 * @MODE_VBLANK_WIDE: vertical blanking too wide
69 * @MODE_PANEL: exceeds panel dimensions
70 * @MODE_INTERLACE_WIDTH: width too large for interlaced mode
71 * @MODE_ONE_WIDTH: only one width is supported
72 * @MODE_ONE_HEIGHT: only one height is supported
73 * @MODE_ONE_SIZE: only one resolution is supported
74 * @MODE_NO_REDUCED: monitor doesn't accept reduced blanking
75 * @MODE_NO_STEREO: stereo modes not supported
76 * @MODE_STALE: mode has become stale
77 * @MODE_BAD: unspecified reason
78 * @MODE_ERROR: error condition
80 * This enum is used to filter out modes not supported by the driver/hardware
83 enum drm_mode_status
{
114 MODE_INTERLACE_WIDTH
,
125 #define DRM_MODE_TYPE_CLOCK_CRTC_C (DRM_MODE_TYPE_CLOCK_C | \
126 DRM_MODE_TYPE_CRTC_C)
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 .base.type = DRM_MODE_OBJECT_MODE
136 #define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */
137 #define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */
138 #define CRTC_NO_DBLSCAN (1 << 2) /* don't adjust doublescan */
139 #define CRTC_NO_VSCAN (1 << 3) /* don't adjust doublescan */
140 #define CRTC_STEREO_DOUBLE_ONLY (CRTC_STEREO_DOUBLE | CRTC_NO_DBLSCAN | CRTC_NO_VSCAN)
142 #define DRM_MODE_FLAG_3D_MAX DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF
145 * struct drm_display_mode - DRM kernel-internal display mode structure
146 * @hdisplay: horizontal display size
147 * @hsync_start: horizontal sync start
148 * @hsync_end: horizontal sync end
149 * @htotal: horizontal total size
150 * @hskew: horizontal skew?!
151 * @vdisplay: vertical display size
152 * @vsync_start: vertical sync start
153 * @vsync_end: vertical sync end
154 * @vtotal: vertical total size
155 * @vscan: vertical scan?!
156 * @crtc_hdisplay: hardware mode horizontal display size
157 * @crtc_hblank_start: hardware mode horizontal blank start
158 * @crtc_hblank_end: hardware mode horizontal blank end
159 * @crtc_hsync_start: hardware mode horizontal sync start
160 * @crtc_hsync_end: hardware mode horizontal sync end
161 * @crtc_htotal: hardware mode horizontal total size
162 * @crtc_hskew: hardware mode horizontal skew?!
163 * @crtc_vdisplay: hardware mode vertical display size
164 * @crtc_vblank_start: hardware mode vertical blank start
165 * @crtc_vblank_end: hardware mode vertical blank end
166 * @crtc_vsync_start: hardware mode vertical sync start
167 * @crtc_vsync_end: hardware mode vertical sync end
168 * @crtc_vtotal: hardware mode vertical total size
170 * The horizontal and vertical timings are defined per the following diagram.
175 * Active Front Sync Back
177 * <-----------------------><----------------><-------------><-------------->
178 * //////////////////////|
179 * ////////////////////// |
180 * ////////////////////// |.................. ................
182 * <----- [hv]display ----->
183 * <------------- [hv]sync_start ------------>
184 * <--------------------- [hv]sync_end --------------------->
185 * <-------------------------------- [hv]total ----------------------------->*
187 * This structure contains two copies of timings. First are the plain timings,
188 * which specify the logical mode, as it would be for a progressive 1:1 scanout
189 * at the refresh rate userspace can observe through vblank timestamps. Then
190 * there's the hardware timings, which are corrected for interlacing,
191 * double-clocking and similar things. They are provided as a convenience, and
192 * can be appropriately computed using drm_mode_set_crtcinfo().
194 struct drm_display_mode
{
198 * struct list_head for mode lists.
200 struct list_head head
;
205 * A display mode is a normal modeset object, possibly including public
210 * This can probably be removed since the entire concept of userspace
211 * managing modes explicitly has never landed in upstream kernel mode
214 struct drm_mode_object base
;
219 * Human-readable name of the mode, filled out with drm_mode_set_name().
221 char name
[DRM_DISPLAY_MODE_LEN
];
226 * Status of the mode, used to filter out modes not supported by the
227 * hardware. See enum &drm_mode_status.
229 enum drm_mode_status status
;
234 * A bitmask of flags, mostly about the source of a mode. Possible flags
237 * - DRM_MODE_TYPE_BUILTIN: Meant for hard-coded modes, effectively
239 * - DRM_MODE_TYPE_PREFERRED: Preferred mode, usually the native
240 * resolution of an LCD panel. There should only be one preferred
241 * mode per connector at any given time.
242 * - DRM_MODE_TYPE_DRIVER: Mode created by the driver, which is all of
243 * them really. Drivers must set this bit for all modes they create
244 * and expose to userspace.
246 * Plus a big list of flags which shouldn't be used at all, but are
247 * still around since these flags are also used in the userspace ABI:
249 * - DRM_MODE_TYPE_DEFAULT: Again a leftover, use
250 * DRM_MODE_TYPE_PREFERRED instead.
251 * - DRM_MODE_TYPE_CLOCK_C and DRM_MODE_TYPE_CRTC_C: Define leftovers
252 * which are stuck around for hysterical raisins only. No one has an
253 * idea what they were meant for. Don't use.
254 * - DRM_MODE_TYPE_USERDEF: Mode defined by userspace, again a vestige
255 * from older kms designs where userspace had to first add a custom
256 * mode to the kernel's mode list before it could use it. Don't use.
263 * Pixel clock in kHz.
265 int clock
; /* in kHz */
279 * Sync and timing flags:
281 * - DRM_MODE_FLAG_PHSYNC: horizontal sync is active high.
282 * - DRM_MODE_FLAG_NHSYNC: horizontal sync is active low.
283 * - DRM_MODE_FLAG_PVSYNC: vertical sync is active high.
284 * - DRM_MODE_FLAG_NVSYNC: vertical sync is active low.
285 * - DRM_MODE_FLAG_INTERLACE: mode is interlaced.
286 * - DRM_MODE_FLAG_DBLSCAN: mode uses doublescan.
287 * - DRM_MODE_FLAG_CSYNC: mode uses composite sync.
288 * - DRM_MODE_FLAG_PCSYNC: composite sync is active high.
289 * - DRM_MODE_FLAG_NCSYNC: composite sync is active low.
290 * - DRM_MODE_FLAG_HSKEW: hskew provided (not used?).
291 * - DRM_MODE_FLAG_BCAST: not used?
292 * - DRM_MODE_FLAG_PIXMUX: not used?
293 * - DRM_MODE_FLAG_DBLCLK: double-clocked mode.
294 * - DRM_MODE_FLAG_CLKDIV2: half-clocked mode.
296 * Additionally there's flags to specify how 3D modes are packed:
298 * - DRM_MODE_FLAG_3D_NONE: normal, non-3D mode.
299 * - DRM_MODE_FLAG_3D_FRAME_PACKING: 2 full frames for left and right.
300 * - DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE: interleaved like fields.
301 * - DRM_MODE_FLAG_3D_LINE_ALTERNATIVE: interleaved lines.
302 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL: side-by-side full frames.
303 * - DRM_MODE_FLAG_3D_L_DEPTH: ?
304 * - DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH: ?
305 * - DRM_MODE_FLAG_3D_TOP_AND_BOTTOM: frame split into top and bottom
307 * - DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF: frame split into left and
315 * Addressable size of the output in mm, projectors should set this to
323 * Addressable size of the output in mm, projectors should set this to
331 * Actual pixel or dot clock in the hardware. This differs from the
332 * logical @clock when e.g. using interlacing, double-clocking, stereo
333 * modes or other fancy stuff that changes the timings and signals
334 * actually sent over the wire.
336 * This is again in kHz.
338 * Note that with digital outputs like HDMI or DP there's usually a
339 * massive confusion between the dot clock and the signal clock at the
340 * bit encoding level. Especially when a 8b/10b encoding is used and the
341 * difference is exactly a factor of 10.
345 int crtc_hblank_start
;
347 int crtc_hsync_start
;
352 int crtc_vblank_start
;
354 int crtc_vsync_start
;
361 * Pointer for driver private data. This can only be used for mode
362 * objects passed to drivers in modeset operations. It shouldn't be used
363 * by atomic drivers since they can store any additional data by
364 * subclassing state structures.
371 * Similar to @private, but just an integer.
378 * Vertical refresh rate, for debug output in human readable form. Not
379 * used in a functional way.
381 * This value is in Hz.
388 * Horizontal refresh rate, for debug output in human readable form. Not
389 * used in a functional way.
391 * This value is in kHz.
396 * @picture_aspect_ratio:
398 * Field for setting the HDMI picture aspect ratio of a mode.
400 enum hdmi_picture_aspect picture_aspect_ratio
;
403 /* mode specified on the command line */
404 struct drm_cmdline_mode
{
406 bool refresh_specified
;
415 enum drm_connector_force force
;
419 * drm_mode_is_stereo - check for stereo mode flags
420 * @mode: drm_display_mode to check
423 * True if the mode is one of the stereo modes (like side-by-side), false if
426 static inline bool drm_mode_is_stereo(const struct drm_display_mode
*mode
)
428 return mode
->flags
& DRM_MODE_FLAG_3D_MASK
;
431 struct drm_connector
;
432 struct drm_cmdline_mode
;
434 struct drm_display_mode
*drm_mode_create(struct drm_device
*dev
);
435 void drm_mode_destroy(struct drm_device
*dev
, struct drm_display_mode
*mode
);
436 void drm_mode_convert_to_umode(struct drm_mode_modeinfo
*out
,
437 const struct drm_display_mode
*in
);
438 int drm_mode_convert_umode(struct drm_display_mode
*out
,
439 const struct drm_mode_modeinfo
*in
);
440 void drm_mode_probed_add(struct drm_connector
*connector
, struct drm_display_mode
*mode
);
441 void drm_mode_debug_printmodeline(const struct drm_display_mode
*mode
);
443 struct drm_display_mode
*drm_cvt_mode(struct drm_device
*dev
,
444 int hdisplay
, int vdisplay
, int vrefresh
,
445 bool reduced
, bool interlaced
,
447 struct drm_display_mode
*drm_gtf_mode(struct drm_device
*dev
,
448 int hdisplay
, int vdisplay
, int vrefresh
,
449 bool interlaced
, int margins
);
450 struct drm_display_mode
*drm_gtf_mode_complex(struct drm_device
*dev
,
451 int hdisplay
, int vdisplay
,
452 int vrefresh
, bool interlaced
,
454 int GTF_M
, int GTF_2C
,
455 int GTF_K
, int GTF_2J
);
456 void drm_display_mode_from_videomode(const struct videomode
*vm
,
457 struct drm_display_mode
*dmode
);
458 void drm_display_mode_to_videomode(const struct drm_display_mode
*dmode
,
459 struct videomode
*vm
);
460 int of_get_drm_display_mode(struct device_node
*np
,
461 struct drm_display_mode
*dmode
,
464 void drm_mode_set_name(struct drm_display_mode
*mode
);
465 int drm_mode_hsync(const struct drm_display_mode
*mode
);
466 int drm_mode_vrefresh(const struct drm_display_mode
*mode
);
468 void drm_mode_set_crtcinfo(struct drm_display_mode
*p
,
470 void drm_mode_copy(struct drm_display_mode
*dst
,
471 const struct drm_display_mode
*src
);
472 struct drm_display_mode
*drm_mode_duplicate(struct drm_device
*dev
,
473 const struct drm_display_mode
*mode
);
474 bool drm_mode_equal(const struct drm_display_mode
*mode1
,
475 const struct drm_display_mode
*mode2
);
476 bool drm_mode_equal_no_clocks(const struct drm_display_mode
*mode1
,
477 const struct drm_display_mode
*mode2
);
478 bool drm_mode_equal_no_clocks_no_stereo(const struct drm_display_mode
*mode1
,
479 const struct drm_display_mode
*mode2
);
481 /* for use by the crtc helper probe functions */
482 enum drm_mode_status
drm_mode_validate_basic(const struct drm_display_mode
*mode
);
483 enum drm_mode_status
drm_mode_validate_size(const struct drm_display_mode
*mode
,
485 void drm_mode_prune_invalid(struct drm_device
*dev
,
486 struct list_head
*mode_list
, bool verbose
);
487 void drm_mode_sort(struct list_head
*mode_list
);
488 void drm_mode_connector_list_update(struct drm_connector
*connector
);
490 /* parsing cmdline modes */
492 drm_mode_parse_command_line_for_connector(const char *mode_option
,
493 struct drm_connector
*connector
,
494 struct drm_cmdline_mode
*mode
);
495 struct drm_display_mode
*
496 drm_mode_create_from_cmdline_mode(struct drm_device
*dev
,
497 struct drm_cmdline_mode
*cmd
);
499 #endif /* __DRM_MODES_H__ */