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1/*
2 * Copyright (c) 2006-2009 Red Hat Inc.
3 * Copyright (c) 2006-2008 Intel Corporation
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 *
6 * DRM framebuffer helper functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Dave Airlie <airlied@linux.ie>
28 * Jesse Barnes <jesse.barnes@intel.com>
29 */
30#ifndef DRM_FB_HELPER_H
31#define DRM_FB_HELPER_H
32
33struct drm_clip_rect;
34struct drm_fb_helper;
35
36#include <linux/fb.h>
37
38#include <drm/drm_client.h>
39
40/**
41 * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
42 * @fb_width: fbdev width
43 * @fb_height: fbdev height
44 * @surface_width: scanout buffer width
45 * @surface_height: scanout buffer height
46 * @surface_bpp: scanout buffer bpp
47 * @surface_depth: scanout buffer depth
48 *
49 * Note that the scanout surface width/height may be larger than the fbdev
50 * width/height. In case of multiple displays, the scanout surface is sized
51 * according to the largest width/height (so it is large enough for all CRTCs
52 * to scanout). But the fbdev width/height is sized to the minimum width/
53 * height of all the displays. This ensures that fbcon fits on the smallest
54 * of the attached displays. fb_width/fb_height is used by
55 * drm_fb_helper_fill_info() to fill out the &fb_info.var structure.
56 */
57struct drm_fb_helper_surface_size {
58 u32 fb_width;
59 u32 fb_height;
60 u32 surface_width;
61 u32 surface_height;
62 u32 surface_bpp;
63 u32 surface_depth;
64};
65
66/**
67 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
68 *
69 * Driver callbacks used by the fbdev emulation helper library.
70 */
71struct drm_fb_helper_funcs {
72 /**
73 * @fb_probe:
74 *
75 * Driver callback to allocate and initialize the fbdev info structure.
76 * Furthermore it also needs to allocate the DRM framebuffer used to
77 * back the fbdev.
78 *
79 * This callback is mandatory.
80 *
81 * RETURNS:
82 *
83 * The driver should return 0 on success and a negative error code on
84 * failure.
85 */
86 int (*fb_probe)(struct drm_fb_helper *helper,
87 struct drm_fb_helper_surface_size *sizes);
88
89 /**
90 * @fb_dirty:
91 *
92 * Driver callback to update the framebuffer memory. If set, fbdev
93 * emulation will invoke this callback in regular intervals after
94 * the framebuffer has been written.
95 *
96 * This callback is optional.
97 *
98 * Returns:
99 * 0 on success, or an error code otherwise.
100 */
101 int (*fb_dirty)(struct drm_fb_helper *helper, struct drm_clip_rect *clip);
102};
103
104/**
105 * struct drm_fb_helper - main structure to emulate fbdev on top of KMS
106 * @fb: Scanout framebuffer object
107 * @dev: DRM device
108 * @funcs: driver callbacks for fb helper
109 * @info: emulated fbdev device info struct
110 * @pseudo_palette: fake palette of 16 colors
111 * @damage_clip: clip rectangle used with deferred_io to accumulate damage to
112 * the screen buffer
113 * @damage_lock: spinlock protecting @damage_clip
114 * @damage_work: worker used to flush the framebuffer
115 * @resume_work: worker used during resume if the console lock is already taken
116 *
117 * This is the main structure used by the fbdev helpers. Drivers supporting
118 * fbdev emulation should embedded this into their overall driver structure.
119 * Drivers must also fill out a &struct drm_fb_helper_funcs with a few
120 * operations.
121 */
122struct drm_fb_helper {
123 /**
124 * @client:
125 *
126 * DRM client used by the generic fbdev emulation.
127 */
128 struct drm_client_dev client;
129
130 /**
131 * @buffer:
132 *
133 * Framebuffer used by the generic fbdev emulation.
134 */
135 struct drm_client_buffer *buffer;
136
137 struct drm_framebuffer *fb;
138 struct drm_device *dev;
139 const struct drm_fb_helper_funcs *funcs;
140 struct fb_info *info;
141 u32 pseudo_palette[17];
142 struct drm_clip_rect damage_clip;
143 spinlock_t damage_lock;
144 struct work_struct damage_work;
145 struct work_struct resume_work;
146
147 /**
148 * @lock:
149 *
150 * Top-level FBDEV helper lock. This protects all internal data
151 * structures and lists, such as @connector_info and @crtc_info.
152 *
153 * FIXME: fbdev emulation locking is a mess and long term we want to
154 * protect all helper internal state with this lock as well as reduce
155 * core KMS locking as much as possible.
156 */
157 struct mutex lock;
158
159 /**
160 * @kernel_fb_list:
161 *
162 * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
163 */
164 struct list_head kernel_fb_list;
165
166 /**
167 * @delayed_hotplug:
168 *
169 * A hotplug was received while fbdev wasn't in control of the DRM
170 * device, i.e. another KMS master was active. The output configuration
171 * needs to be reprobe when fbdev is in control again.
172 */
173 bool delayed_hotplug;
174
175 /**
176 * @deferred_setup:
177 *
178 * If no outputs are connected (disconnected or unknown) the FB helper
179 * code will defer setup until at least one of the outputs shows up.
180 * This field keeps track of the status so that setup can be retried
181 * at every hotplug event until it succeeds eventually.
182 *
183 * Protected by @lock.
184 */
185 bool deferred_setup;
186
187 /**
188 * @preferred_bpp:
189 *
190 * Temporary storage for the driver's preferred BPP setting passed to
191 * FB helper initialization. This needs to be tracked so that deferred
192 * FB helper setup can pass this on.
193 *
194 * See also: @deferred_setup
195 */
196 int preferred_bpp;
197
198#ifdef CONFIG_FB_DEFERRED_IO
199 /**
200 * @fbdefio:
201 *
202 * Temporary storage for the driver's FB deferred I/O handler. If the
203 * driver uses the DRM fbdev emulation layer, this is set by the core
204 * to a generic deferred I/O handler if a driver is preferring to use
205 * a shadow buffer.
206 */
207 struct fb_deferred_io fbdefio;
208#endif
209};
210
211static inline struct drm_fb_helper *
212drm_fb_helper_from_client(struct drm_client_dev *client)
213{
214 return container_of(client, struct drm_fb_helper, client);
215}
216
217/**
218 * define DRM_FB_HELPER_DEFAULT_OPS - helper define for drm drivers
219 *
220 * Helper define to register default implementations of drm_fb_helper
221 * functions. To be used in struct fb_ops of drm drivers.
222 */
223#define DRM_FB_HELPER_DEFAULT_OPS \
224 .fb_check_var = drm_fb_helper_check_var, \
225 .fb_set_par = drm_fb_helper_set_par, \
226 .fb_setcmap = drm_fb_helper_setcmap, \
227 .fb_blank = drm_fb_helper_blank, \
228 .fb_pan_display = drm_fb_helper_pan_display, \
229 .fb_debug_enter = drm_fb_helper_debug_enter, \
230 .fb_debug_leave = drm_fb_helper_debug_leave, \
231 .fb_ioctl = drm_fb_helper_ioctl
232
233#ifdef CONFIG_DRM_FBDEV_EMULATION
234void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
235 unsigned int preferred_bpp,
236 const struct drm_fb_helper_funcs *funcs);
237void drm_fb_helper_unprepare(struct drm_fb_helper *fb_helper);
238int drm_fb_helper_init(struct drm_device *dev, struct drm_fb_helper *helper);
239void drm_fb_helper_fini(struct drm_fb_helper *helper);
240int drm_fb_helper_blank(int blank, struct fb_info *info);
241int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
242 struct fb_info *info);
243int drm_fb_helper_set_par(struct fb_info *info);
244int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
245 struct fb_info *info);
246
247int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
248
249struct fb_info *drm_fb_helper_alloc_info(struct drm_fb_helper *fb_helper);
250void drm_fb_helper_release_info(struct drm_fb_helper *fb_helper);
251void drm_fb_helper_unregister_info(struct drm_fb_helper *fb_helper);
252void drm_fb_helper_fill_info(struct fb_info *info,
253 struct drm_fb_helper *fb_helper,
254 struct drm_fb_helper_surface_size *sizes);
255
256void drm_fb_helper_damage_range(struct fb_info *info, off_t off, size_t len);
257void drm_fb_helper_damage_area(struct fb_info *info, u32 x, u32 y, u32 width, u32 height);
258
259#ifdef CONFIG_FB_DEFERRED_IO
260void drm_fb_helper_deferred_io(struct fb_info *info, struct list_head *pagereflist);
261#endif
262
263void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, bool suspend);
264void drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper,
265 bool suspend);
266
267int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
268
269int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
270 unsigned long arg);
271
272int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
273int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper);
274int drm_fb_helper_debug_enter(struct fb_info *info);
275int drm_fb_helper_debug_leave(struct fb_info *info);
276void drm_fb_helper_lastclose(struct drm_device *dev);
277#else
278static inline void drm_fb_helper_prepare(struct drm_device *dev,
279 struct drm_fb_helper *helper,
280 unsigned int preferred_bpp,
281 const struct drm_fb_helper_funcs *funcs)
282{
283}
284
285static inline void drm_fb_helper_unprepare(struct drm_fb_helper *fb_helper)
286{
287}
288
289static inline int drm_fb_helper_init(struct drm_device *dev,
290 struct drm_fb_helper *helper)
291{
292 /* So drivers can use it to free the struct */
293 helper->dev = dev;
294 dev->fb_helper = helper;
295
296 return 0;
297}
298
299static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
300{
301 if (helper && helper->dev)
302 helper->dev->fb_helper = NULL;
303}
304
305static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
306{
307 return 0;
308}
309
310static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
311 struct fb_info *info)
312{
313 return 0;
314}
315
316static inline int drm_fb_helper_set_par(struct fb_info *info)
317{
318 return 0;
319}
320
321static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
322 struct fb_info *info)
323{
324 return 0;
325}
326
327static inline int
328drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
329{
330 return 0;
331}
332
333static inline struct fb_info *
334drm_fb_helper_alloc_info(struct drm_fb_helper *fb_helper)
335{
336 return NULL;
337}
338
339static inline void drm_fb_helper_release_info(struct drm_fb_helper *fb_helper)
340{
341}
342
343static inline void drm_fb_helper_unregister_info(struct drm_fb_helper *fb_helper)
344{
345}
346
347static inline void
348drm_fb_helper_fill_info(struct fb_info *info,
349 struct drm_fb_helper *fb_helper,
350 struct drm_fb_helper_surface_size *sizes)
351{
352}
353
354static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
355 struct fb_info *info)
356{
357 return 0;
358}
359
360static inline int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,
361 unsigned long arg)
362{
363 return 0;
364}
365
366#ifdef CONFIG_FB_DEFERRED_IO
367static inline void drm_fb_helper_deferred_io(struct fb_info *info,
368 struct list_head *pagelist)
369{
370}
371#endif
372
373static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
374 bool suspend)
375{
376}
377
378static inline void
379drm_fb_helper_set_suspend_unlocked(struct drm_fb_helper *fb_helper, bool suspend)
380{
381}
382
383static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
384{
385 return 0;
386}
387
388static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper)
389{
390 return 0;
391}
392
393static inline int drm_fb_helper_debug_enter(struct fb_info *info)
394{
395 return 0;
396}
397
398static inline int drm_fb_helper_debug_leave(struct fb_info *info)
399{
400 return 0;
401}
402
403static inline void drm_fb_helper_lastclose(struct drm_device *dev)
404{
405}
406#endif
407
408#endif
1/*
2 * Copyright (c) 2006-2009 Red Hat Inc.
3 * Copyright (c) 2006-2008 Intel Corporation
4 * Copyright (c) 2007 Dave Airlie <airlied@linux.ie>
5 *
6 * DRM framebuffer helper functions
7 *
8 * Permission to use, copy, modify, distribute, and sell this software and its
9 * documentation for any purpose is hereby granted without fee, provided that
10 * the above copyright notice appear in all copies and that both that copyright
11 * notice and this permission notice appear in supporting documentation, and
12 * that the name of the copyright holders not be used in advertising or
13 * publicity pertaining to distribution of the software without specific,
14 * written prior permission. The copyright holders make no representations
15 * about the suitability of this software for any purpose. It is provided "as
16 * is" without express or implied warranty.
17 *
18 * THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
19 * INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
20 * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
21 * CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
22 * DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
23 * TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
24 * OF THIS SOFTWARE.
25 *
26 * Authors:
27 * Dave Airlie <airlied@linux.ie>
28 * Jesse Barnes <jesse.barnes@intel.com>
29 */
30#ifndef DRM_FB_HELPER_H
31#define DRM_FB_HELPER_H
32
33struct drm_fb_helper;
34
35#include <linux/kgdb.h>
36
37enum mode_set_atomic {
38 LEAVE_ATOMIC_MODE_SET,
39 ENTER_ATOMIC_MODE_SET,
40};
41
42struct drm_fb_offset {
43 int x, y;
44};
45
46struct drm_fb_helper_crtc {
47 struct drm_mode_set mode_set;
48 struct drm_display_mode *desired_mode;
49 int x, y;
50};
51
52/**
53 * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size
54 * @fb_width: fbdev width
55 * @fb_height: fbdev height
56 * @surface_width: scanout buffer width
57 * @surface_height: scanout buffer height
58 * @surface_bpp: scanout buffer bpp
59 * @surface_depth: scanout buffer depth
60 *
61 * Note that the scanout surface width/height may be larger than the fbdev
62 * width/height. In case of multiple displays, the scanout surface is sized
63 * according to the largest width/height (so it is large enough for all CRTCs
64 * to scanout). But the fbdev width/height is sized to the minimum width/
65 * height of all the displays. This ensures that fbcon fits on the smallest
66 * of the attached displays.
67 *
68 * So what is passed to drm_fb_helper_fill_var() should be fb_width/fb_height,
69 * rather than the surface size.
70 */
71struct drm_fb_helper_surface_size {
72 u32 fb_width;
73 u32 fb_height;
74 u32 surface_width;
75 u32 surface_height;
76 u32 surface_bpp;
77 u32 surface_depth;
78};
79
80/**
81 * struct drm_fb_helper_funcs - driver callbacks for the fbdev emulation library
82 *
83 * Driver callbacks used by the fbdev emulation helper library.
84 */
85struct drm_fb_helper_funcs {
86 /**
87 * @gamma_set:
88 *
89 * Set the given gamma LUT register on the given CRTC.
90 *
91 * This callback is optional.
92 *
93 * FIXME:
94 *
95 * This callback is functionally redundant with the core gamma table
96 * support and simply exists because the fbdev hasn't yet been
97 * refactored to use the core gamma table interfaces.
98 */
99 void (*gamma_set)(struct drm_crtc *crtc, u16 red, u16 green,
100 u16 blue, int regno);
101 /**
102 * @gamma_get:
103 *
104 * Read the given gamma LUT register on the given CRTC, used to save the
105 * current LUT when force-restoring the fbdev for e.g. kdbg.
106 *
107 * This callback is optional.
108 *
109 * FIXME:
110 *
111 * This callback is functionally redundant with the core gamma table
112 * support and simply exists because the fbdev hasn't yet been
113 * refactored to use the core gamma table interfaces.
114 */
115 void (*gamma_get)(struct drm_crtc *crtc, u16 *red, u16 *green,
116 u16 *blue, int regno);
117
118 /**
119 * @fb_probe:
120 *
121 * Driver callback to allocate and initialize the fbdev info structure.
122 * Furthermore it also needs to allocate the DRM framebuffer used to
123 * back the fbdev.
124 *
125 * This callback is mandatory.
126 *
127 * RETURNS:
128 *
129 * The driver should return 0 on success and a negative error code on
130 * failure.
131 */
132 int (*fb_probe)(struct drm_fb_helper *helper,
133 struct drm_fb_helper_surface_size *sizes);
134
135 /**
136 * @initial_config:
137 *
138 * Driver callback to setup an initial fbdev display configuration.
139 * Drivers can use this callback to tell the fbdev emulation what the
140 * preferred initial configuration is. This is useful to implement
141 * smooth booting where the fbdev (and subsequently all userspace) never
142 * changes the mode, but always inherits the existing configuration.
143 *
144 * This callback is optional.
145 *
146 * RETURNS:
147 *
148 * The driver should return true if a suitable initial configuration has
149 * been filled out and false when the fbdev helper should fall back to
150 * the default probing logic.
151 */
152 bool (*initial_config)(struct drm_fb_helper *fb_helper,
153 struct drm_fb_helper_crtc **crtcs,
154 struct drm_display_mode **modes,
155 struct drm_fb_offset *offsets,
156 bool *enabled, int width, int height);
157};
158
159struct drm_fb_helper_connector {
160 struct drm_connector *connector;
161};
162
163/**
164 * struct drm_fb_helper - main structure to emulate fbdev on top of KMS
165 * @fb: Scanout framebuffer object
166 * @dev: DRM device
167 * @crtc_count: number of possible CRTCs
168 * @crtc_info: per-CRTC helper state (mode, x/y offset, etc)
169 * @connector_count: number of connected connectors
170 * @connector_info_alloc_count: size of connector_info
171 * @connector_info: array of per-connector information
172 * @funcs: driver callbacks for fb helper
173 * @fbdev: emulated fbdev device info struct
174 * @pseudo_palette: fake palette of 16 colors
175 *
176 * This is the main structure used by the fbdev helpers. Drivers supporting
177 * fbdev emulation should embedded this into their overall driver structure.
178 * Drivers must also fill out a struct &drm_fb_helper_funcs with a few
179 * operations.
180 */
181struct drm_fb_helper {
182 struct drm_framebuffer *fb;
183 struct drm_device *dev;
184 int crtc_count;
185 struct drm_fb_helper_crtc *crtc_info;
186 int connector_count;
187 int connector_info_alloc_count;
188 struct drm_fb_helper_connector **connector_info;
189 const struct drm_fb_helper_funcs *funcs;
190 struct fb_info *fbdev;
191 u32 pseudo_palette[17];
192
193 /**
194 * @kernel_fb_list:
195 *
196 * Entry on the global kernel_fb_helper_list, used for kgdb entry/exit.
197 */
198 struct list_head kernel_fb_list;
199
200 /**
201 * @delayed_hotplug:
202 *
203 * A hotplug was received while fbdev wasn't in control of the DRM
204 * device, i.e. another KMS master was active. The output configuration
205 * needs to be reprobe when fbdev is in control again.
206 */
207 bool delayed_hotplug;
208
209 /**
210 * @atomic:
211 *
212 * Use atomic updates for restore_fbdev_mode(), etc. This defaults to
213 * true if driver has DRIVER_ATOMIC feature flag, but drivers can
214 * override it to true after drm_fb_helper_init() if they support atomic
215 * modeset but do not yet advertise DRIVER_ATOMIC (note that fb-helper
216 * does not require ASYNC commits).
217 */
218 bool atomic;
219};
220
221#ifdef CONFIG_DRM_FBDEV_EMULATION
222int drm_fb_helper_modinit(void);
223void drm_fb_helper_prepare(struct drm_device *dev, struct drm_fb_helper *helper,
224 const struct drm_fb_helper_funcs *funcs);
225int drm_fb_helper_init(struct drm_device *dev,
226 struct drm_fb_helper *helper, int crtc_count,
227 int max_conn);
228void drm_fb_helper_fini(struct drm_fb_helper *helper);
229int drm_fb_helper_blank(int blank, struct fb_info *info);
230int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
231 struct fb_info *info);
232int drm_fb_helper_set_par(struct fb_info *info);
233int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
234 struct fb_info *info);
235
236int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper);
237
238struct fb_info *drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper);
239void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper);
240void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper);
241void drm_fb_helper_fill_var(struct fb_info *info, struct drm_fb_helper *fb_helper,
242 uint32_t fb_width, uint32_t fb_height);
243void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
244 uint32_t depth);
245
246void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper);
247
248ssize_t drm_fb_helper_sys_read(struct fb_info *info, char __user *buf,
249 size_t count, loff_t *ppos);
250ssize_t drm_fb_helper_sys_write(struct fb_info *info, const char __user *buf,
251 size_t count, loff_t *ppos);
252
253void drm_fb_helper_sys_fillrect(struct fb_info *info,
254 const struct fb_fillrect *rect);
255void drm_fb_helper_sys_copyarea(struct fb_info *info,
256 const struct fb_copyarea *area);
257void drm_fb_helper_sys_imageblit(struct fb_info *info,
258 const struct fb_image *image);
259
260void drm_fb_helper_cfb_fillrect(struct fb_info *info,
261 const struct fb_fillrect *rect);
262void drm_fb_helper_cfb_copyarea(struct fb_info *info,
263 const struct fb_copyarea *area);
264void drm_fb_helper_cfb_imageblit(struct fb_info *info,
265 const struct fb_image *image);
266
267void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper, int state);
268
269int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info);
270
271int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper);
272int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel);
273int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper);
274int drm_fb_helper_debug_enter(struct fb_info *info);
275int drm_fb_helper_debug_leave(struct fb_info *info);
276struct drm_display_mode *
277drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
278 int width, int height);
279struct drm_display_mode *
280drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
281 int width, int height);
282
283int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector);
284int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
285 struct drm_connector *connector);
286#else
287static inline int drm_fb_helper_modinit(void)
288{
289 return 0;
290}
291
292static inline void drm_fb_helper_prepare(struct drm_device *dev,
293 struct drm_fb_helper *helper,
294 const struct drm_fb_helper_funcs *funcs)
295{
296}
297
298static inline int drm_fb_helper_init(struct drm_device *dev,
299 struct drm_fb_helper *helper, int crtc_count,
300 int max_conn)
301{
302 return 0;
303}
304
305static inline void drm_fb_helper_fini(struct drm_fb_helper *helper)
306{
307}
308
309static inline int drm_fb_helper_blank(int blank, struct fb_info *info)
310{
311 return 0;
312}
313
314static inline int drm_fb_helper_pan_display(struct fb_var_screeninfo *var,
315 struct fb_info *info)
316{
317 return 0;
318}
319
320static inline int drm_fb_helper_set_par(struct fb_info *info)
321{
322 return 0;
323}
324
325static inline int drm_fb_helper_check_var(struct fb_var_screeninfo *var,
326 struct fb_info *info)
327{
328 return 0;
329}
330
331static inline int
332drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper)
333{
334 return 0;
335}
336
337static inline struct fb_info *
338drm_fb_helper_alloc_fbi(struct drm_fb_helper *fb_helper)
339{
340 return NULL;
341}
342
343static inline void drm_fb_helper_unregister_fbi(struct drm_fb_helper *fb_helper)
344{
345}
346static inline void drm_fb_helper_release_fbi(struct drm_fb_helper *fb_helper)
347{
348}
349
350static inline void drm_fb_helper_fill_var(struct fb_info *info,
351 struct drm_fb_helper *fb_helper,
352 uint32_t fb_width, uint32_t fb_height)
353{
354}
355
356static inline void drm_fb_helper_fill_fix(struct fb_info *info, uint32_t pitch,
357 uint32_t depth)
358{
359}
360
361static inline int drm_fb_helper_setcmap(struct fb_cmap *cmap,
362 struct fb_info *info)
363{
364 return 0;
365}
366
367static inline void drm_fb_helper_unlink_fbi(struct drm_fb_helper *fb_helper)
368{
369}
370
371static inline ssize_t drm_fb_helper_sys_read(struct fb_info *info,
372 char __user *buf, size_t count,
373 loff_t *ppos)
374{
375 return -ENODEV;
376}
377
378static inline ssize_t drm_fb_helper_sys_write(struct fb_info *info,
379 const char __user *buf,
380 size_t count, loff_t *ppos)
381{
382 return -ENODEV;
383}
384
385static inline void drm_fb_helper_sys_fillrect(struct fb_info *info,
386 const struct fb_fillrect *rect)
387{
388}
389
390static inline void drm_fb_helper_sys_copyarea(struct fb_info *info,
391 const struct fb_copyarea *area)
392{
393}
394
395static inline void drm_fb_helper_sys_imageblit(struct fb_info *info,
396 const struct fb_image *image)
397{
398}
399
400static inline void drm_fb_helper_cfb_fillrect(struct fb_info *info,
401 const struct fb_fillrect *rect)
402{
403}
404
405static inline void drm_fb_helper_cfb_copyarea(struct fb_info *info,
406 const struct fb_copyarea *area)
407{
408}
409
410static inline void drm_fb_helper_cfb_imageblit(struct fb_info *info,
411 const struct fb_image *image)
412{
413}
414
415static inline void drm_fb_helper_set_suspend(struct drm_fb_helper *fb_helper,
416 int state)
417{
418}
419
420static inline int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper)
421{
422 return 0;
423}
424
425static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper,
426 int bpp_sel)
427{
428 return 0;
429}
430
431static inline int
432drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper)
433{
434 return 0;
435}
436
437static inline int drm_fb_helper_debug_enter(struct fb_info *info)
438{
439 return 0;
440}
441
442static inline int drm_fb_helper_debug_leave(struct fb_info *info)
443{
444 return 0;
445}
446
447static inline struct drm_display_mode *
448drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector,
449 int width, int height)
450{
451 return NULL;
452}
453
454static inline struct drm_display_mode *
455drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn,
456 int width, int height)
457{
458 return NULL;
459}
460
461static inline int
462drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper,
463 struct drm_connector *connector)
464{
465 return 0;
466}
467
468static inline int
469drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper,
470 struct drm_connector *connector)
471{
472 return 0;
473}
474#endif
475#endif