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d480ace0 PM |
1 | /* drivers/video/msm/msm_fb.c |
2 | * | |
3 | * Core MSM framebuffer driver. | |
4 | * | |
5 | * Copyright (C) 2007 Google Incorporated | |
6 | * | |
7 | * This software is licensed under the terms of the GNU General Public | |
8 | * License version 2, as published by the Free Software Foundation, and | |
9 | * may be copied, distributed, and modified under those terms. | |
10 | * | |
11 | * This program is distributed in the hope that it will be useful, | |
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | * GNU General Public License for more details. | |
15 | */ | |
16 | ||
17 | #include <linux/platform_device.h> | |
18 | #include <linux/module.h> | |
19 | #include <linux/fb.h> | |
5a0e3ad6 | 20 | #include <linux/slab.h> |
d480ace0 PM |
21 | #include <linux/delay.h> |
22 | ||
23 | #include <linux/freezer.h> | |
24 | #include <linux/wait.h> | |
25 | #include <linux/msm_mdp.h> | |
26 | #include <linux/io.h> | |
27 | #include <linux/uaccess.h> | |
1ef21f63 | 28 | #include <linux/platform_data/video-msm_fb.h> |
d480ace0 PM |
29 | #include <linux/workqueue.h> |
30 | #include <linux/clk.h> | |
31 | #include <linux/debugfs.h> | |
32 | #include <linux/dma-mapping.h> | |
33 | ||
34 | #define PRINT_FPS 0 | |
35 | #define PRINT_BLIT_TIME 0 | |
36 | ||
37 | #define SLEEPING 0x4 | |
38 | #define UPDATING 0x3 | |
39 | #define FULL_UPDATE_DONE 0x2 | |
40 | #define WAKING 0x1 | |
41 | #define AWAKE 0x0 | |
42 | ||
43 | #define NONE 0 | |
44 | #define SUSPEND_RESUME 0x1 | |
45 | #define FPS 0x2 | |
46 | #define BLIT_TIME 0x4 | |
47 | #define SHOW_UPDATES 0x8 | |
48 | ||
49 | #define DLOG(mask, fmt, args...) \ | |
50 | do { \ | |
51 | if (msmfb_debug_mask & mask) \ | |
52 | printk(KERN_INFO "msmfb: "fmt, ##args); \ | |
53 | } while (0) | |
54 | ||
55 | static int msmfb_debug_mask; | |
56 | module_param_named(msmfb_debug_mask, msmfb_debug_mask, int, | |
57 | S_IRUGO | S_IWUSR | S_IWGRP); | |
58 | ||
59 | struct mdp_device *mdp; | |
60 | ||
61 | struct msmfb_info { | |
62 | struct fb_info *fb; | |
63 | struct msm_panel_data *panel; | |
64 | int xres; | |
65 | int yres; | |
66 | unsigned output_format; | |
67 | unsigned yoffset; | |
68 | unsigned frame_requested; | |
69 | unsigned frame_done; | |
70 | int sleeping; | |
71 | unsigned update_frame; | |
72 | struct { | |
73 | int left; | |
74 | int top; | |
75 | int eright; /* exclusive */ | |
76 | int ebottom; /* exclusive */ | |
77 | } update_info; | |
78 | char *black; | |
79 | ||
80 | spinlock_t update_lock; | |
81 | struct mutex panel_init_lock; | |
82 | wait_queue_head_t frame_wq; | |
d480ace0 PM |
83 | struct work_struct resume_work; |
84 | struct msmfb_callback dma_callback; | |
85 | struct msmfb_callback vsync_callback; | |
86 | struct hrtimer fake_vsync; | |
87 | ktime_t vsync_request_time; | |
88 | }; | |
89 | ||
90 | static int msmfb_open(struct fb_info *info, int user) | |
91 | { | |
92 | return 0; | |
93 | } | |
94 | ||
95 | static int msmfb_release(struct fb_info *info, int user) | |
96 | { | |
97 | return 0; | |
98 | } | |
99 | ||
100 | /* Called from dma interrupt handler, must not sleep */ | |
101 | static void msmfb_handle_dma_interrupt(struct msmfb_callback *callback) | |
102 | { | |
103 | unsigned long irq_flags; | |
104 | struct msmfb_info *msmfb = container_of(callback, struct msmfb_info, | |
105 | dma_callback); | |
106 | ||
107 | spin_lock_irqsave(&msmfb->update_lock, irq_flags); | |
108 | msmfb->frame_done = msmfb->frame_requested; | |
109 | if (msmfb->sleeping == UPDATING && | |
110 | msmfb->frame_done == msmfb->update_frame) { | |
111 | DLOG(SUSPEND_RESUME, "full update completed\n"); | |
48b63b69 | 112 | schedule_work(&msmfb->resume_work); |
d480ace0 PM |
113 | } |
114 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
115 | wake_up(&msmfb->frame_wq); | |
116 | } | |
117 | ||
118 | static int msmfb_start_dma(struct msmfb_info *msmfb) | |
119 | { | |
120 | uint32_t x, y, w, h; | |
121 | unsigned addr; | |
122 | unsigned long irq_flags; | |
123 | uint32_t yoffset; | |
124 | s64 time_since_request; | |
125 | struct msm_panel_data *panel = msmfb->panel; | |
126 | ||
127 | spin_lock_irqsave(&msmfb->update_lock, irq_flags); | |
128 | time_since_request = ktime_to_ns(ktime_sub(ktime_get(), | |
129 | msmfb->vsync_request_time)); | |
130 | if (time_since_request > 20 * NSEC_PER_MSEC) { | |
131 | uint32_t us; | |
132 | us = do_div(time_since_request, NSEC_PER_MSEC) / NSEC_PER_USEC; | |
133 | printk(KERN_WARNING "msmfb_start_dma %lld.%03u ms after vsync " | |
134 | "request\n", time_since_request, us); | |
135 | } | |
136 | if (msmfb->frame_done == msmfb->frame_requested) { | |
137 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
138 | return -1; | |
139 | } | |
140 | if (msmfb->sleeping == SLEEPING) { | |
141 | DLOG(SUSPEND_RESUME, "tried to start dma while asleep\n"); | |
142 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
143 | return -1; | |
144 | } | |
145 | x = msmfb->update_info.left; | |
146 | y = msmfb->update_info.top; | |
147 | w = msmfb->update_info.eright - x; | |
148 | h = msmfb->update_info.ebottom - y; | |
149 | yoffset = msmfb->yoffset; | |
150 | msmfb->update_info.left = msmfb->xres + 1; | |
151 | msmfb->update_info.top = msmfb->yres + 1; | |
152 | msmfb->update_info.eright = 0; | |
153 | msmfb->update_info.ebottom = 0; | |
154 | if (unlikely(w > msmfb->xres || h > msmfb->yres || | |
155 | w == 0 || h == 0)) { | |
156 | printk(KERN_INFO "invalid update: %d %d %d " | |
157 | "%d\n", x, y, w, h); | |
158 | msmfb->frame_done = msmfb->frame_requested; | |
159 | goto error; | |
160 | } | |
161 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
162 | ||
163 | addr = ((msmfb->xres * (yoffset + y) + x) * 2); | |
164 | mdp->dma(mdp, addr + msmfb->fb->fix.smem_start, | |
165 | msmfb->xres * 2, w, h, x, y, &msmfb->dma_callback, | |
166 | panel->interface_type); | |
167 | return 0; | |
168 | error: | |
169 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
170 | /* some clients need to clear their vsync interrupt */ | |
171 | if (panel->clear_vsync) | |
172 | panel->clear_vsync(panel); | |
173 | wake_up(&msmfb->frame_wq); | |
174 | return 0; | |
175 | } | |
176 | ||
177 | /* Called from esync interrupt handler, must not sleep */ | |
178 | static void msmfb_handle_vsync_interrupt(struct msmfb_callback *callback) | |
179 | { | |
180 | struct msmfb_info *msmfb = container_of(callback, struct msmfb_info, | |
181 | vsync_callback); | |
182 | msmfb_start_dma(msmfb); | |
183 | } | |
184 | ||
185 | static enum hrtimer_restart msmfb_fake_vsync(struct hrtimer *timer) | |
186 | { | |
187 | struct msmfb_info *msmfb = container_of(timer, struct msmfb_info, | |
188 | fake_vsync); | |
189 | msmfb_start_dma(msmfb); | |
190 | return HRTIMER_NORESTART; | |
191 | } | |
192 | ||
193 | static void msmfb_pan_update(struct fb_info *info, uint32_t left, uint32_t top, | |
194 | uint32_t eright, uint32_t ebottom, | |
195 | uint32_t yoffset, int pan_display) | |
196 | { | |
197 | struct msmfb_info *msmfb = info->par; | |
198 | struct msm_panel_data *panel = msmfb->panel; | |
199 | unsigned long irq_flags; | |
200 | int sleeping; | |
201 | int retry = 1; | |
202 | ||
203 | DLOG(SHOW_UPDATES, "update %d %d %d %d %d %d\n", | |
204 | left, top, eright, ebottom, yoffset, pan_display); | |
205 | restart: | |
206 | spin_lock_irqsave(&msmfb->update_lock, irq_flags); | |
207 | ||
208 | /* if we are sleeping, on a pan_display wait 10ms (to throttle back | |
209 | * drawing otherwise return */ | |
210 | if (msmfb->sleeping == SLEEPING) { | |
211 | DLOG(SUSPEND_RESUME, "drawing while asleep\n"); | |
212 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
213 | if (pan_display) | |
214 | wait_event_interruptible_timeout(msmfb->frame_wq, | |
215 | msmfb->sleeping != SLEEPING, HZ/10); | |
216 | return; | |
217 | } | |
218 | ||
219 | sleeping = msmfb->sleeping; | |
220 | /* on a full update, if the last frame has not completed, wait for it */ | |
5d55779a AH |
221 | if ((pan_display && msmfb->frame_requested != msmfb->frame_done) || |
222 | sleeping == UPDATING) { | |
d480ace0 PM |
223 | int ret; |
224 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
225 | ret = wait_event_interruptible_timeout(msmfb->frame_wq, | |
226 | msmfb->frame_done == msmfb->frame_requested && | |
227 | msmfb->sleeping != UPDATING, 5 * HZ); | |
228 | if (ret <= 0 && (msmfb->frame_requested != msmfb->frame_done || | |
229 | msmfb->sleeping == UPDATING)) { | |
230 | if (retry && panel->request_vsync && | |
231 | (sleeping == AWAKE)) { | |
232 | panel->request_vsync(panel, | |
233 | &msmfb->vsync_callback); | |
234 | retry = 0; | |
235 | printk(KERN_WARNING "msmfb_pan_display timeout " | |
236 | "rerequest vsync\n"); | |
237 | } else { | |
238 | printk(KERN_WARNING "msmfb_pan_display timeout " | |
239 | "waiting for frame start, %d %d\n", | |
240 | msmfb->frame_requested, | |
241 | msmfb->frame_done); | |
242 | return; | |
243 | } | |
244 | } | |
245 | goto restart; | |
246 | } | |
247 | ||
248 | ||
249 | msmfb->frame_requested++; | |
250 | /* if necessary, update the y offset, if this is the | |
251 | * first full update on resume, set the sleeping state */ | |
252 | if (pan_display) { | |
253 | msmfb->yoffset = yoffset; | |
254 | if (left == 0 && top == 0 && eright == info->var.xres && | |
255 | ebottom == info->var.yres) { | |
256 | if (sleeping == WAKING) { | |
257 | msmfb->update_frame = msmfb->frame_requested; | |
258 | DLOG(SUSPEND_RESUME, "full update starting\n"); | |
259 | msmfb->sleeping = UPDATING; | |
260 | } | |
261 | } | |
262 | } | |
263 | ||
264 | /* set the update request */ | |
265 | if (left < msmfb->update_info.left) | |
266 | msmfb->update_info.left = left; | |
267 | if (top < msmfb->update_info.top) | |
268 | msmfb->update_info.top = top; | |
269 | if (eright > msmfb->update_info.eright) | |
270 | msmfb->update_info.eright = eright; | |
271 | if (ebottom > msmfb->update_info.ebottom) | |
272 | msmfb->update_info.ebottom = ebottom; | |
273 | DLOG(SHOW_UPDATES, "update queued %d %d %d %d %d\n", | |
274 | msmfb->update_info.left, msmfb->update_info.top, | |
275 | msmfb->update_info.eright, msmfb->update_info.ebottom, | |
276 | msmfb->yoffset); | |
277 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
278 | ||
279 | /* if the panel is all the way on wait for vsync, otherwise sleep | |
280 | * for 16 ms (long enough for the dma to panel) and then begin dma */ | |
281 | msmfb->vsync_request_time = ktime_get(); | |
282 | if (panel->request_vsync && (sleeping == AWAKE)) { | |
283 | panel->request_vsync(panel, &msmfb->vsync_callback); | |
284 | } else { | |
285 | if (!hrtimer_active(&msmfb->fake_vsync)) { | |
286 | hrtimer_start(&msmfb->fake_vsync, | |
287 | ktime_set(0, NSEC_PER_SEC/60), | |
288 | HRTIMER_MODE_REL); | |
289 | } | |
290 | } | |
291 | } | |
292 | ||
293 | static void msmfb_update(struct fb_info *info, uint32_t left, uint32_t top, | |
294 | uint32_t eright, uint32_t ebottom) | |
295 | { | |
296 | msmfb_pan_update(info, left, top, eright, ebottom, 0, 0); | |
297 | } | |
298 | ||
299 | static void power_on_panel(struct work_struct *work) | |
300 | { | |
301 | struct msmfb_info *msmfb = | |
302 | container_of(work, struct msmfb_info, resume_work); | |
303 | struct msm_panel_data *panel = msmfb->panel; | |
304 | unsigned long irq_flags; | |
305 | ||
306 | mutex_lock(&msmfb->panel_init_lock); | |
307 | DLOG(SUSPEND_RESUME, "turning on panel\n"); | |
308 | if (msmfb->sleeping == UPDATING) { | |
309 | if (panel->unblank(panel)) { | |
310 | printk(KERN_INFO "msmfb: panel unblank failed," | |
311 | "not starting drawing\n"); | |
312 | goto error; | |
313 | } | |
314 | spin_lock_irqsave(&msmfb->update_lock, irq_flags); | |
315 | msmfb->sleeping = AWAKE; | |
316 | wake_up(&msmfb->frame_wq); | |
317 | spin_unlock_irqrestore(&msmfb->update_lock, irq_flags); | |
318 | } | |
319 | error: | |
320 | mutex_unlock(&msmfb->panel_init_lock); | |
321 | } | |
322 | ||
323 | ||
324 | static int msmfb_check_var(struct fb_var_screeninfo *var, struct fb_info *info) | |
325 | { | |
326 | if ((var->xres != info->var.xres) || | |
327 | (var->yres != info->var.yres) || | |
328 | (var->xres_virtual != info->var.xres_virtual) || | |
329 | (var->yres_virtual != info->var.yres_virtual) || | |
330 | (var->xoffset != info->var.xoffset) || | |
331 | (var->bits_per_pixel != info->var.bits_per_pixel) || | |
332 | (var->grayscale != info->var.grayscale)) | |
333 | return -EINVAL; | |
334 | return 0; | |
335 | } | |
336 | ||
337 | int msmfb_pan_display(struct fb_var_screeninfo *var, struct fb_info *info) | |
338 | { | |
339 | struct msmfb_info *msmfb = info->par; | |
340 | struct msm_panel_data *panel = msmfb->panel; | |
341 | ||
342 | /* "UPDT" */ | |
343 | if ((panel->caps & MSMFB_CAP_PARTIAL_UPDATES) && | |
344 | (var->reserved[0] == 0x54445055)) { | |
345 | msmfb_pan_update(info, var->reserved[1] & 0xffff, | |
346 | var->reserved[1] >> 16, | |
347 | var->reserved[2] & 0xffff, | |
348 | var->reserved[2] >> 16, var->yoffset, 1); | |
349 | } else { | |
350 | msmfb_pan_update(info, 0, 0, info->var.xres, info->var.yres, | |
351 | var->yoffset, 1); | |
352 | } | |
353 | return 0; | |
354 | } | |
355 | ||
356 | static void msmfb_fillrect(struct fb_info *p, const struct fb_fillrect *rect) | |
357 | { | |
358 | cfb_fillrect(p, rect); | |
359 | msmfb_update(p, rect->dx, rect->dy, rect->dx + rect->width, | |
360 | rect->dy + rect->height); | |
361 | } | |
362 | ||
363 | static void msmfb_copyarea(struct fb_info *p, const struct fb_copyarea *area) | |
364 | { | |
365 | cfb_copyarea(p, area); | |
366 | msmfb_update(p, area->dx, area->dy, area->dx + area->width, | |
367 | area->dy + area->height); | |
368 | } | |
369 | ||
370 | static void msmfb_imageblit(struct fb_info *p, const struct fb_image *image) | |
371 | { | |
372 | cfb_imageblit(p, image); | |
373 | msmfb_update(p, image->dx, image->dy, image->dx + image->width, | |
374 | image->dy + image->height); | |
375 | } | |
376 | ||
377 | ||
378 | static int msmfb_blit(struct fb_info *info, | |
379 | void __user *p) | |
380 | { | |
381 | struct mdp_blit_req req; | |
382 | struct mdp_blit_req_list req_list; | |
383 | int i; | |
384 | int ret; | |
385 | ||
386 | if (copy_from_user(&req_list, p, sizeof(req_list))) | |
387 | return -EFAULT; | |
388 | ||
389 | for (i = 0; i < req_list.count; i++) { | |
390 | struct mdp_blit_req_list *list = | |
391 | (struct mdp_blit_req_list *)p; | |
392 | if (copy_from_user(&req, &list->req[i], sizeof(req))) | |
393 | return -EFAULT; | |
394 | ret = mdp->blit(mdp, info, &req); | |
395 | if (ret) | |
396 | return ret; | |
397 | } | |
398 | return 0; | |
399 | } | |
400 | ||
401 | ||
402 | DEFINE_MUTEX(mdp_ppp_lock); | |
403 | ||
404 | static int msmfb_ioctl(struct fb_info *p, unsigned int cmd, unsigned long arg) | |
405 | { | |
406 | void __user *argp = (void __user *)arg; | |
407 | int ret; | |
408 | ||
409 | switch (cmd) { | |
410 | case MSMFB_GRP_DISP: | |
411 | mdp->set_grp_disp(mdp, arg); | |
412 | break; | |
413 | case MSMFB_BLIT: | |
414 | ret = msmfb_blit(p, argp); | |
415 | if (ret) | |
416 | return ret; | |
417 | break; | |
418 | default: | |
419 | printk(KERN_INFO "msmfb unknown ioctl: %d\n", cmd); | |
420 | return -EINVAL; | |
421 | } | |
422 | return 0; | |
423 | } | |
424 | ||
425 | static struct fb_ops msmfb_ops = { | |
426 | .owner = THIS_MODULE, | |
427 | .fb_open = msmfb_open, | |
428 | .fb_release = msmfb_release, | |
429 | .fb_check_var = msmfb_check_var, | |
430 | .fb_pan_display = msmfb_pan_display, | |
431 | .fb_fillrect = msmfb_fillrect, | |
432 | .fb_copyarea = msmfb_copyarea, | |
433 | .fb_imageblit = msmfb_imageblit, | |
434 | .fb_ioctl = msmfb_ioctl, | |
435 | }; | |
436 | ||
437 | static unsigned PP[16]; | |
438 | ||
439 | ||
440 | ||
441 | #define BITS_PER_PIXEL 16 | |
442 | ||
443 | static void setup_fb_info(struct msmfb_info *msmfb) | |
444 | { | |
445 | struct fb_info *fb_info = msmfb->fb; | |
446 | int r; | |
447 | ||
448 | /* finish setting up the fb_info struct */ | |
449 | strncpy(fb_info->fix.id, "msmfb", 16); | |
450 | fb_info->fix.ypanstep = 1; | |
451 | ||
452 | fb_info->fbops = &msmfb_ops; | |
453 | fb_info->flags = FBINFO_DEFAULT; | |
454 | ||
455 | fb_info->fix.type = FB_TYPE_PACKED_PIXELS; | |
456 | fb_info->fix.visual = FB_VISUAL_TRUECOLOR; | |
457 | fb_info->fix.line_length = msmfb->xres * 2; | |
458 | ||
459 | fb_info->var.xres = msmfb->xres; | |
460 | fb_info->var.yres = msmfb->yres; | |
461 | fb_info->var.width = msmfb->panel->fb_data->width; | |
462 | fb_info->var.height = msmfb->panel->fb_data->height; | |
463 | fb_info->var.xres_virtual = msmfb->xres; | |
464 | fb_info->var.yres_virtual = msmfb->yres * 2; | |
465 | fb_info->var.bits_per_pixel = BITS_PER_PIXEL; | |
466 | fb_info->var.accel_flags = 0; | |
467 | ||
468 | fb_info->var.yoffset = 0; | |
469 | ||
470 | if (msmfb->panel->caps & MSMFB_CAP_PARTIAL_UPDATES) { | |
b0a67932 DZ |
471 | /* |
472 | * Set the param in the fixed screen, so userspace can't | |
473 | * change it. This will be used to check for the | |
474 | * capability. | |
475 | */ | |
476 | fb_info->fix.reserved[0] = 0x5444; | |
477 | fb_info->fix.reserved[1] = 0x5055; | |
478 | ||
479 | /* | |
480 | * This preloads the value so that if userspace doesn't | |
481 | * change it, it will be a full update | |
482 | */ | |
d480ace0 PM |
483 | fb_info->var.reserved[0] = 0x54445055; |
484 | fb_info->var.reserved[1] = 0; | |
485 | fb_info->var.reserved[2] = (uint16_t)msmfb->xres | | |
486 | ((uint32_t)msmfb->yres << 16); | |
487 | } | |
488 | ||
489 | fb_info->var.red.offset = 11; | |
490 | fb_info->var.red.length = 5; | |
491 | fb_info->var.red.msb_right = 0; | |
492 | fb_info->var.green.offset = 5; | |
493 | fb_info->var.green.length = 6; | |
494 | fb_info->var.green.msb_right = 0; | |
495 | fb_info->var.blue.offset = 0; | |
496 | fb_info->var.blue.length = 5; | |
497 | fb_info->var.blue.msb_right = 0; | |
498 | ||
499 | r = fb_alloc_cmap(&fb_info->cmap, 16, 0); | |
500 | fb_info->pseudo_palette = PP; | |
501 | ||
502 | PP[0] = 0; | |
503 | for (r = 1; r < 16; r++) | |
504 | PP[r] = 0xffffffff; | |
505 | } | |
506 | ||
507 | static int setup_fbmem(struct msmfb_info *msmfb, struct platform_device *pdev) | |
508 | { | |
509 | struct fb_info *fb = msmfb->fb; | |
510 | struct resource *resource; | |
511 | unsigned long size = msmfb->xres * msmfb->yres * | |
512 | (BITS_PER_PIXEL >> 3) * 2; | |
513 | unsigned char *fbram; | |
514 | ||
515 | /* board file might have attached a resource describing an fb */ | |
516 | resource = platform_get_resource(pdev, IORESOURCE_MEM, 0); | |
517 | if (!resource) | |
518 | return -EINVAL; | |
519 | ||
520 | /* check the resource is large enough to fit the fb */ | |
521 | if (resource->end - resource->start < size) { | |
522 | printk(KERN_ERR "allocated resource is too small for " | |
523 | "fb\n"); | |
524 | return -ENOMEM; | |
525 | } | |
526 | fb->fix.smem_start = resource->start; | |
28f65c11 JP |
527 | fb->fix.smem_len = resource_size(resource); |
528 | fbram = ioremap(resource->start, resource_size(resource)); | |
529 | if (fbram == NULL) { | |
d480ace0 PM |
530 | printk(KERN_ERR "msmfb: cannot allocate fbram!\n"); |
531 | return -ENOMEM; | |
532 | } | |
533 | fb->screen_base = fbram; | |
534 | return 0; | |
535 | } | |
536 | ||
537 | static int msmfb_probe(struct platform_device *pdev) | |
538 | { | |
539 | struct fb_info *fb; | |
540 | struct msmfb_info *msmfb; | |
541 | struct msm_panel_data *panel = pdev->dev.platform_data; | |
542 | int ret; | |
543 | ||
544 | if (!panel) { | |
545 | pr_err("msmfb_probe: no platform data\n"); | |
546 | return -EINVAL; | |
547 | } | |
548 | if (!panel->fb_data) { | |
549 | pr_err("msmfb_probe: no fb_data\n"); | |
550 | return -EINVAL; | |
551 | } | |
552 | ||
553 | fb = framebuffer_alloc(sizeof(struct msmfb_info), &pdev->dev); | |
554 | if (!fb) | |
555 | return -ENOMEM; | |
556 | msmfb = fb->par; | |
557 | msmfb->fb = fb; | |
558 | msmfb->panel = panel; | |
559 | msmfb->xres = panel->fb_data->xres; | |
560 | msmfb->yres = panel->fb_data->yres; | |
561 | ||
562 | ret = setup_fbmem(msmfb, pdev); | |
563 | if (ret) | |
564 | goto error_setup_fbmem; | |
565 | ||
566 | setup_fb_info(msmfb); | |
567 | ||
568 | spin_lock_init(&msmfb->update_lock); | |
569 | mutex_init(&msmfb->panel_init_lock); | |
570 | init_waitqueue_head(&msmfb->frame_wq); | |
d480ace0 PM |
571 | INIT_WORK(&msmfb->resume_work, power_on_panel); |
572 | msmfb->black = kzalloc(msmfb->fb->var.bits_per_pixel*msmfb->xres, | |
573 | GFP_KERNEL); | |
574 | ||
575 | printk(KERN_INFO "msmfb_probe() installing %d x %d panel\n", | |
576 | msmfb->xres, msmfb->yres); | |
577 | ||
578 | msmfb->dma_callback.func = msmfb_handle_dma_interrupt; | |
579 | msmfb->vsync_callback.func = msmfb_handle_vsync_interrupt; | |
580 | hrtimer_init(&msmfb->fake_vsync, CLOCK_MONOTONIC, | |
581 | HRTIMER_MODE_REL); | |
582 | ||
583 | ||
584 | msmfb->fake_vsync.function = msmfb_fake_vsync; | |
585 | ||
586 | ret = register_framebuffer(fb); | |
587 | if (ret) | |
588 | goto error_register_framebuffer; | |
589 | ||
590 | msmfb->sleeping = WAKING; | |
591 | ||
592 | return 0; | |
593 | ||
594 | error_register_framebuffer: | |
d480ace0 PM |
595 | iounmap(fb->screen_base); |
596 | error_setup_fbmem: | |
597 | framebuffer_release(msmfb->fb); | |
598 | return ret; | |
599 | } | |
600 | ||
601 | static struct platform_driver msm_panel_driver = { | |
602 | /* need to write remove */ | |
603 | .probe = msmfb_probe, | |
604 | .driver = {.name = "msm_panel"}, | |
605 | }; | |
606 | ||
607 | ||
608 | static int msmfb_add_mdp_device(struct device *dev, | |
609 | struct class_interface *class_intf) | |
610 | { | |
611 | /* might need locking if mulitple mdp devices */ | |
612 | if (mdp) | |
613 | return 0; | |
614 | mdp = container_of(dev, struct mdp_device, dev); | |
615 | return platform_driver_register(&msm_panel_driver); | |
616 | } | |
617 | ||
618 | static void msmfb_remove_mdp_device(struct device *dev, | |
619 | struct class_interface *class_intf) | |
620 | { | |
621 | /* might need locking if mulitple mdp devices */ | |
622 | if (dev != &mdp->dev) | |
623 | return; | |
624 | platform_driver_unregister(&msm_panel_driver); | |
625 | mdp = NULL; | |
626 | } | |
627 | ||
628 | static struct class_interface msm_fb_interface = { | |
629 | .add_dev = &msmfb_add_mdp_device, | |
630 | .remove_dev = &msmfb_remove_mdp_device, | |
631 | }; | |
632 | ||
633 | static int __init msmfb_init(void) | |
634 | { | |
635 | return register_mdp_client(&msm_fb_interface); | |
636 | } | |
637 | ||
638 | module_init(msmfb_init); |