1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * linux/drivers/video/mmp/fb/mmpfb.c
4 * Framebuffer driver for Marvell Display controller.
5 *
6 * Copyright (C) 2012 Marvell Technology Group Ltd.
7 * Authors: Zhou Zhu <zzhu3@marvell.com>
8 */
9 #include <linux/module.h>
10 #include <linux/dma-mapping.h>
11 #include <linux/platform_device.h>
12 #include "mmpfb.h"
13
var_to_pixfmt(struct fb_var_screeninfo * var)14 static int var_to_pixfmt(struct fb_var_screeninfo *var)
15 {
16 /*
17 * Pseudocolor mode?
18 */
19 if (var->bits_per_pixel == 8)
20 return PIXFMT_PSEUDOCOLOR;
21
22 /*
23 * Check for YUV422PLANAR.
24 */
25 if (var->bits_per_pixel == 16 && var->red.length == 8 &&
26 var->green.length == 4 && var->blue.length == 4) {
27 if (var->green.offset >= var->blue.offset)
28 return PIXFMT_YUV422P;
29 else
30 return PIXFMT_YVU422P;
31 }
32
33 /*
34 * Check for YUV420PLANAR.
35 */
36 if (var->bits_per_pixel == 12 && var->red.length == 8 &&
37 var->green.length == 2 && var->blue.length == 2) {
38 if (var->green.offset >= var->blue.offset)
39 return PIXFMT_YUV420P;
40 else
41 return PIXFMT_YVU420P;
42 }
43
44 /*
45 * Check for YUV422PACK.
46 */
47 if (var->bits_per_pixel == 16 && var->red.length == 16 &&
48 var->green.length == 16 && var->blue.length == 16) {
49 if (var->red.offset == 0)
50 return PIXFMT_YUYV;
51 else if (var->green.offset >= var->blue.offset)
52 return PIXFMT_UYVY;
53 else
54 return PIXFMT_VYUY;
55 }
56
57 /*
58 * Check for 565/1555.
59 */
60 if (var->bits_per_pixel == 16 && var->red.length <= 5 &&
61 var->green.length <= 6 && var->blue.length <= 5) {
62 if (var->transp.length == 0) {
63 if (var->red.offset >= var->blue.offset)
64 return PIXFMT_RGB565;
65 else
66 return PIXFMT_BGR565;
67 }
68 }
69
70 /*
71 * Check for 888/A888.
72 */
73 if (var->bits_per_pixel <= 32 && var->red.length <= 8 &&
74 var->green.length <= 8 && var->blue.length <= 8) {
75 if (var->bits_per_pixel == 24 && var->transp.length == 0) {
76 if (var->red.offset >= var->blue.offset)
77 return PIXFMT_RGB888PACK;
78 else
79 return PIXFMT_BGR888PACK;
80 }
81
82 if (var->bits_per_pixel == 32 && var->transp.offset == 24) {
83 if (var->red.offset >= var->blue.offset)
84 return PIXFMT_RGBA888;
85 else
86 return PIXFMT_BGRA888;
87 } else {
88 if (var->red.offset >= var->blue.offset)
89 return PIXFMT_RGB888UNPACK;
90 else
91 return PIXFMT_BGR888UNPACK;
92 }
93 }
94
95 return -EINVAL;
96 }
97
pixfmt_to_var(struct fb_var_screeninfo * var,int pix_fmt)98 static void pixfmt_to_var(struct fb_var_screeninfo *var, int pix_fmt)
99 {
100 switch (pix_fmt) {
101 case PIXFMT_RGB565:
102 var->bits_per_pixel = 16;
103 var->red.offset = 11; var->red.length = 5;
104 var->green.offset = 5; var->green.length = 6;
105 var->blue.offset = 0; var->blue.length = 5;
106 var->transp.offset = 0; var->transp.length = 0;
107 break;
108 case PIXFMT_BGR565:
109 var->bits_per_pixel = 16;
110 var->red.offset = 0; var->red.length = 5;
111 var->green.offset = 5; var->green.length = 6;
112 var->blue.offset = 11; var->blue.length = 5;
113 var->transp.offset = 0; var->transp.length = 0;
114 break;
115 case PIXFMT_RGB888UNPACK:
116 var->bits_per_pixel = 32;
117 var->red.offset = 16; var->red.length = 8;
118 var->green.offset = 8; var->green.length = 8;
119 var->blue.offset = 0; var->blue.length = 8;
120 var->transp.offset = 0; var->transp.length = 0;
121 break;
122 case PIXFMT_BGR888UNPACK:
123 var->bits_per_pixel = 32;
124 var->red.offset = 0; var->red.length = 8;
125 var->green.offset = 8; var->green.length = 8;
126 var->blue.offset = 16; var->blue.length = 8;
127 var->transp.offset = 0; var->transp.length = 0;
128 break;
129 case PIXFMT_RGBA888:
130 var->bits_per_pixel = 32;
131 var->red.offset = 16; var->red.length = 8;
132 var->green.offset = 8; var->green.length = 8;
133 var->blue.offset = 0; var->blue.length = 8;
134 var->transp.offset = 24; var->transp.length = 8;
135 break;
136 case PIXFMT_BGRA888:
137 var->bits_per_pixel = 32;
138 var->red.offset = 0; var->red.length = 8;
139 var->green.offset = 8; var->green.length = 8;
140 var->blue.offset = 16; var->blue.length = 8;
141 var->transp.offset = 24; var->transp.length = 8;
142 break;
143 case PIXFMT_RGB888PACK:
144 var->bits_per_pixel = 24;
145 var->red.offset = 16; var->red.length = 8;
146 var->green.offset = 8; var->green.length = 8;
147 var->blue.offset = 0; var->blue.length = 8;
148 var->transp.offset = 0; var->transp.length = 0;
149 break;
150 case PIXFMT_BGR888PACK:
151 var->bits_per_pixel = 24;
152 var->red.offset = 0; var->red.length = 8;
153 var->green.offset = 8; var->green.length = 8;
154 var->blue.offset = 16; var->blue.length = 8;
155 var->transp.offset = 0; var->transp.length = 0;
156 break;
157 case PIXFMT_YUV420P:
158 var->bits_per_pixel = 12;
159 var->red.offset = 4; var->red.length = 8;
160 var->green.offset = 2; var->green.length = 2;
161 var->blue.offset = 0; var->blue.length = 2;
162 var->transp.offset = 0; var->transp.length = 0;
163 break;
164 case PIXFMT_YVU420P:
165 var->bits_per_pixel = 12;
166 var->red.offset = 4; var->red.length = 8;
167 var->green.offset = 0; var->green.length = 2;
168 var->blue.offset = 2; var->blue.length = 2;
169 var->transp.offset = 0; var->transp.length = 0;
170 break;
171 case PIXFMT_YUV422P:
172 var->bits_per_pixel = 16;
173 var->red.offset = 8; var->red.length = 8;
174 var->green.offset = 4; var->green.length = 4;
175 var->blue.offset = 0; var->blue.length = 4;
176 var->transp.offset = 0; var->transp.length = 0;
177 break;
178 case PIXFMT_YVU422P:
179 var->bits_per_pixel = 16;
180 var->red.offset = 8; var->red.length = 8;
181 var->green.offset = 0; var->green.length = 4;
182 var->blue.offset = 4; var->blue.length = 4;
183 var->transp.offset = 0; var->transp.length = 0;
184 break;
185 case PIXFMT_UYVY:
186 var->bits_per_pixel = 16;
187 var->red.offset = 8; var->red.length = 16;
188 var->green.offset = 4; var->green.length = 16;
189 var->blue.offset = 0; var->blue.length = 16;
190 var->transp.offset = 0; var->transp.length = 0;
191 break;
192 case PIXFMT_VYUY:
193 var->bits_per_pixel = 16;
194 var->red.offset = 8; var->red.length = 16;
195 var->green.offset = 0; var->green.length = 16;
196 var->blue.offset = 4; var->blue.length = 16;
197 var->transp.offset = 0; var->transp.length = 0;
198 break;
199 case PIXFMT_YUYV:
200 var->bits_per_pixel = 16;
201 var->red.offset = 0; var->red.length = 16;
202 var->green.offset = 4; var->green.length = 16;
203 var->blue.offset = 8; var->blue.length = 16;
204 var->transp.offset = 0; var->transp.length = 0;
205 break;
206 case PIXFMT_PSEUDOCOLOR:
207 var->bits_per_pixel = 8;
208 var->red.offset = 0; var->red.length = 8;
209 var->green.offset = 0; var->green.length = 8;
210 var->blue.offset = 0; var->blue.length = 8;
211 var->transp.offset = 0; var->transp.length = 0;
212 break;
213 }
214 }
215
216 /*
217 * fb framework has its limitation:
218 * 1. input color/output color is not seprated
219 * 2. fb_videomode not include output color
220 * so for fb usage, we keep a output format which is not changed
221 * then it's added for mmpmode
222 */
fbmode_to_mmpmode(struct mmp_mode * mode,struct fb_videomode * videomode,int output_fmt)223 static void fbmode_to_mmpmode(struct mmp_mode *mode,
224 struct fb_videomode *videomode, int output_fmt)
225 {
226 u64 div_result = 1000000000000ll;
227 mode->name = videomode->name;
228 mode->refresh = videomode->refresh;
229 mode->xres = videomode->xres;
230 mode->yres = videomode->yres;
231
232 do_div(div_result, videomode->pixclock);
233 mode->pixclock_freq = (u32)div_result;
234
235 mode->left_margin = videomode->left_margin;
236 mode->right_margin = videomode->right_margin;
237 mode->upper_margin = videomode->upper_margin;
238 mode->lower_margin = videomode->lower_margin;
239 mode->hsync_len = videomode->hsync_len;
240 mode->vsync_len = videomode->vsync_len;
241 mode->hsync_invert = !!(videomode->sync & FB_SYNC_HOR_HIGH_ACT);
242 mode->vsync_invert = !!(videomode->sync & FB_SYNC_VERT_HIGH_ACT);
243 /* no defined flag in fb, use vmode>>3*/
244 mode->invert_pixclock = !!(videomode->vmode & 8);
245 mode->pix_fmt_out = output_fmt;
246 }
247
mmpmode_to_fbmode(struct fb_videomode * videomode,struct mmp_mode * mode)248 static void mmpmode_to_fbmode(struct fb_videomode *videomode,
249 struct mmp_mode *mode)
250 {
251 u64 div_result = 1000000000000ll;
252
253 videomode->name = mode->name;
254 videomode->refresh = mode->refresh;
255 videomode->xres = mode->xres;
256 videomode->yres = mode->yres;
257
258 do_div(div_result, mode->pixclock_freq);
259 videomode->pixclock = (u32)div_result;
260
261 videomode->left_margin = mode->left_margin;
262 videomode->right_margin = mode->right_margin;
263 videomode->upper_margin = mode->upper_margin;
264 videomode->lower_margin = mode->lower_margin;
265 videomode->hsync_len = mode->hsync_len;
266 videomode->vsync_len = mode->vsync_len;
267 videomode->sync = (mode->hsync_invert ? FB_SYNC_HOR_HIGH_ACT : 0)
268 | (mode->vsync_invert ? FB_SYNC_VERT_HIGH_ACT : 0);
269 videomode->vmode = mode->invert_pixclock ? 8 : 0;
270 }
271
mmpfb_check_var(struct fb_var_screeninfo * var,struct fb_info * info)272 static int mmpfb_check_var(struct fb_var_screeninfo *var,
273 struct fb_info *info)
274 {
275 struct mmpfb_info *fbi = info->par;
276
277 if (var->bits_per_pixel == 8)
278 return -EINVAL;
279 /*
280 * Basic geometry sanity checks.
281 */
282 if (var->xoffset + var->xres > var->xres_virtual)
283 return -EINVAL;
284 if (var->yoffset + var->yres > var->yres_virtual)
285 return -EINVAL;
286
287 /*
288 * Check size of framebuffer.
289 */
290 if (var->xres_virtual * var->yres_virtual *
291 (var->bits_per_pixel >> 3) > fbi->fb_size)
292 return -EINVAL;
293
294 return 0;
295 }
296
chan_to_field(unsigned int chan,struct fb_bitfield * bf)297 static unsigned int chan_to_field(unsigned int chan, struct fb_bitfield *bf)
298 {
299 return ((chan & 0xffff) >> (16 - bf->length)) << bf->offset;
300 }
301
to_rgb(u16 red,u16 green,u16 blue)302 static u32 to_rgb(u16 red, u16 green, u16 blue)
303 {
304 red >>= 8;
305 green >>= 8;
306 blue >>= 8;
307
308 return (red << 16) | (green << 8) | blue;
309 }
310
mmpfb_setcolreg(unsigned int regno,unsigned int red,unsigned int green,unsigned int blue,unsigned int trans,struct fb_info * info)311 static int mmpfb_setcolreg(unsigned int regno, unsigned int red,
312 unsigned int green, unsigned int blue,
313 unsigned int trans, struct fb_info *info)
314 {
315 struct mmpfb_info *fbi = info->par;
316 u32 val;
317
318 if (info->fix.visual == FB_VISUAL_TRUECOLOR && regno < 16) {
319 val = chan_to_field(red, &info->var.red);
320 val |= chan_to_field(green, &info->var.green);
321 val |= chan_to_field(blue , &info->var.blue);
322 fbi->pseudo_palette[regno] = val;
323 }
324
325 if (info->fix.visual == FB_VISUAL_PSEUDOCOLOR && regno < 256) {
326 val = to_rgb(red, green, blue);
327 /* TODO */
328 }
329
330 return 0;
331 }
332
mmpfb_pan_display(struct fb_var_screeninfo * var,struct fb_info * info)333 static int mmpfb_pan_display(struct fb_var_screeninfo *var,
334 struct fb_info *info)
335 {
336 struct mmpfb_info *fbi = info->par;
337 struct mmp_addr addr;
338
339 memset(&addr, 0, sizeof(addr));
340 addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
341 * var->bits_per_pixel / 8 + fbi->fb_start_dma;
342 mmp_overlay_set_addr(fbi->overlay, &addr);
343
344 return 0;
345 }
346
var_update(struct fb_info * info)347 static int var_update(struct fb_info *info)
348 {
349 struct mmpfb_info *fbi = info->par;
350 struct fb_var_screeninfo *var = &info->var;
351 struct fb_videomode *m;
352 int pix_fmt;
353
354 /* set pix_fmt */
355 pix_fmt = var_to_pixfmt(var);
356 if (pix_fmt < 0)
357 return -EINVAL;
358 pixfmt_to_var(var, pix_fmt);
359 fbi->pix_fmt = pix_fmt;
360
361 /* set var according to best video mode*/
362 m = (struct fb_videomode *)fb_match_mode(var, &info->modelist);
363 if (!m) {
364 dev_err(fbi->dev, "set par: no match mode, use best mode\n");
365 m = (struct fb_videomode *)fb_find_best_mode(var,
366 &info->modelist);
367 fb_videomode_to_var(var, m);
368 }
369 memcpy(&fbi->mode, m, sizeof(struct fb_videomode));
370
371 /* fix to 2* yres */
372 var->yres_virtual = var->yres * 2;
373 info->fix.visual = (pix_fmt == PIXFMT_PSEUDOCOLOR) ?
374 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
375 info->fix.line_length = var->xres_virtual * var->bits_per_pixel / 8;
376 info->fix.ypanstep = var->yres;
377 return 0;
378 }
379
mmpfb_set_win(struct fb_info * info)380 static void mmpfb_set_win(struct fb_info *info)
381 {
382 struct mmpfb_info *fbi = info->par;
383 struct fb_var_screeninfo *var = &info->var;
384 struct mmp_win win;
385 u32 stride;
386
387 memset(&win, 0, sizeof(win));
388 win.xsrc = win.xdst = fbi->mode.xres;
389 win.ysrc = win.ydst = fbi->mode.yres;
390 win.pix_fmt = fbi->pix_fmt;
391 stride = pixfmt_to_stride(win.pix_fmt);
392 win.pitch[0] = var->xres_virtual * stride;
393 win.pitch[1] = win.pitch[2] =
394 (stride == 1) ? (var->xres_virtual >> 1) : 0;
395 mmp_overlay_set_win(fbi->overlay, &win);
396 }
397
mmpfb_set_par(struct fb_info * info)398 static int mmpfb_set_par(struct fb_info *info)
399 {
400 struct mmpfb_info *fbi = info->par;
401 struct fb_var_screeninfo *var = &info->var;
402 struct mmp_addr addr;
403 struct mmp_mode mode;
404 int ret;
405
406 ret = var_update(info);
407 if (ret != 0)
408 return ret;
409
410 /* set window/path according to new videomode */
411 fbmode_to_mmpmode(&mode, &fbi->mode, fbi->output_fmt);
412 mmp_path_set_mode(fbi->path, &mode);
413
414 /* set window related info */
415 mmpfb_set_win(info);
416
417 /* set address always */
418 memset(&addr, 0, sizeof(addr));
419 addr.phys[0] = (var->yoffset * var->xres_virtual + var->xoffset)
420 * var->bits_per_pixel / 8 + fbi->fb_start_dma;
421 mmp_overlay_set_addr(fbi->overlay, &addr);
422
423 return 0;
424 }
425
mmpfb_power(struct mmpfb_info * fbi,int power)426 static void mmpfb_power(struct mmpfb_info *fbi, int power)
427 {
428 struct mmp_addr addr;
429 struct fb_var_screeninfo *var = &fbi->fb_info->var;
430
431 /* for power on, always set address/window again */
432 if (power) {
433 /* set window related info */
434 mmpfb_set_win(fbi->fb_info);
435
436 /* set address always */
437 memset(&addr, 0, sizeof(addr));
438 addr.phys[0] = fbi->fb_start_dma +
439 (var->yoffset * var->xres_virtual + var->xoffset)
440 * var->bits_per_pixel / 8;
441 mmp_overlay_set_addr(fbi->overlay, &addr);
442 }
443 mmp_overlay_set_onoff(fbi->overlay, power);
444 }
445
mmpfb_blank(int blank,struct fb_info * info)446 static int mmpfb_blank(int blank, struct fb_info *info)
447 {
448 struct mmpfb_info *fbi = info->par;
449
450 mmpfb_power(fbi, (blank == FB_BLANK_UNBLANK));
451
452 return 0;
453 }
454
455 static const struct fb_ops mmpfb_ops = {
456 .owner = THIS_MODULE,
457 .fb_blank = mmpfb_blank,
458 .fb_check_var = mmpfb_check_var,
459 .fb_set_par = mmpfb_set_par,
460 .fb_setcolreg = mmpfb_setcolreg,
461 .fb_pan_display = mmpfb_pan_display,
462 .fb_fillrect = cfb_fillrect,
463 .fb_copyarea = cfb_copyarea,
464 .fb_imageblit = cfb_imageblit,
465 };
466
modes_setup(struct mmpfb_info * fbi)467 static int modes_setup(struct mmpfb_info *fbi)
468 {
469 struct fb_videomode *videomodes;
470 struct mmp_mode *mmp_modes;
471 struct fb_info *info = fbi->fb_info;
472 int videomode_num, i;
473
474 /* get videomodes from path */
475 videomode_num = mmp_path_get_modelist(fbi->path, &mmp_modes);
476 if (!videomode_num) {
477 dev_warn(fbi->dev, "can't get videomode num\n");
478 return 0;
479 }
480 /* put videomode list to info structure */
481 videomodes = kcalloc(videomode_num, sizeof(struct fb_videomode),
482 GFP_KERNEL);
483 if (!videomodes)
484 return -ENOMEM;
485
486 for (i = 0; i < videomode_num; i++)
487 mmpmode_to_fbmode(&videomodes[i], &mmp_modes[i]);
488 fb_videomode_to_modelist(videomodes, videomode_num, &info->modelist);
489
490 /* set videomode[0] as default mode */
491 memcpy(&fbi->mode, &videomodes[0], sizeof(struct fb_videomode));
492 fbi->output_fmt = mmp_modes[0].pix_fmt_out;
493 fb_videomode_to_var(&info->var, &fbi->mode);
494 mmp_path_set_mode(fbi->path, &mmp_modes[0]);
495
496 kfree(videomodes);
497 return videomode_num;
498 }
499
fb_info_setup(struct fb_info * info,struct mmpfb_info * fbi)500 static int fb_info_setup(struct fb_info *info,
501 struct mmpfb_info *fbi)
502 {
503 int ret = 0;
504 /* Initialise static fb parameters.*/
505 info->flags = FBINFO_DEFAULT | FBINFO_PARTIAL_PAN_OK |
506 FBINFO_HWACCEL_XPAN | FBINFO_HWACCEL_YPAN;
507 info->node = -1;
508 strcpy(info->fix.id, fbi->name);
509 info->fix.type = FB_TYPE_PACKED_PIXELS;
510 info->fix.type_aux = 0;
511 info->fix.xpanstep = 0;
512 info->fix.ypanstep = info->var.yres;
513 info->fix.ywrapstep = 0;
514 info->fix.accel = FB_ACCEL_NONE;
515 info->fix.smem_start = fbi->fb_start_dma;
516 info->fix.smem_len = fbi->fb_size;
517 info->fix.visual = (fbi->pix_fmt == PIXFMT_PSEUDOCOLOR) ?
518 FB_VISUAL_PSEUDOCOLOR : FB_VISUAL_TRUECOLOR;
519 info->fix.line_length = info->var.xres_virtual *
520 info->var.bits_per_pixel / 8;
521 info->fbops = &mmpfb_ops;
522 info->pseudo_palette = fbi->pseudo_palette;
523 info->screen_buffer = fbi->fb_start;
524 info->screen_size = fbi->fb_size;
525
526 /* For FB framework: Allocate color map and Register framebuffer*/
527 if (fb_alloc_cmap(&info->cmap, 256, 0) < 0)
528 ret = -ENOMEM;
529
530 return ret;
531 }
532
fb_info_clear(struct fb_info * info)533 static void fb_info_clear(struct fb_info *info)
534 {
535 fb_dealloc_cmap(&info->cmap);
536 }
537
mmpfb_probe(struct platform_device * pdev)538 static int mmpfb_probe(struct platform_device *pdev)
539 {
540 struct mmp_buffer_driver_mach_info *mi;
541 struct fb_info *info;
542 struct mmpfb_info *fbi;
543 int ret, modes_num;
544
545 mi = pdev->dev.platform_data;
546 if (mi == NULL) {
547 dev_err(&pdev->dev, "no platform data defined\n");
548 return -EINVAL;
549 }
550
551 /* initialize fb */
552 info = framebuffer_alloc(sizeof(struct mmpfb_info), &pdev->dev);
553 if (info == NULL)
554 return -ENOMEM;
555 fbi = info->par;
556
557 /* init fb */
558 fbi->fb_info = info;
559 platform_set_drvdata(pdev, fbi);
560 fbi->dev = &pdev->dev;
561 fbi->name = mi->name;
562 fbi->pix_fmt = mi->default_pixfmt;
563 pixfmt_to_var(&info->var, fbi->pix_fmt);
564 mutex_init(&fbi->access_ok);
565
566 /* get display path by name */
567 fbi->path = mmp_get_path(mi->path_name);
568 if (!fbi->path) {
569 dev_err(&pdev->dev, "can't get the path %s\n", mi->path_name);
570 ret = -EINVAL;
571 goto failed_destroy_mutex;
572 }
573
574 dev_info(fbi->dev, "path %s get\n", fbi->path->name);
575
576 /* get overlay */
577 fbi->overlay = mmp_path_get_overlay(fbi->path, mi->overlay_id);
578 if (!fbi->overlay) {
579 ret = -EINVAL;
580 goto failed_destroy_mutex;
581 }
582 /* set fetch used */
583 mmp_overlay_set_fetch(fbi->overlay, mi->dmafetch_id);
584
585 modes_num = modes_setup(fbi);
586 if (modes_num < 0) {
587 ret = modes_num;
588 goto failed_destroy_mutex;
589 }
590
591 /*
592 * if get modes success, means not hotplug panels, use caculated buffer
593 * or use default size
594 */
595 if (modes_num > 0) {
596 /* fix to 2* yres */
597 info->var.yres_virtual = info->var.yres * 2;
598
599 /* Allocate framebuffer memory: size = modes xy *4 */
600 fbi->fb_size = info->var.xres_virtual * info->var.yres_virtual
601 * info->var.bits_per_pixel / 8;
602 } else {
603 fbi->fb_size = MMPFB_DEFAULT_SIZE;
604 }
605
606 fbi->fb_start = dma_alloc_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size),
607 &fbi->fb_start_dma, GFP_KERNEL);
608 if (fbi->fb_start == NULL) {
609 dev_err(&pdev->dev, "can't alloc framebuffer\n");
610 ret = -ENOMEM;
611 goto failed_destroy_mutex;
612 }
613 dev_info(fbi->dev, "fb %dk allocated\n", fbi->fb_size/1024);
614
615 /* fb power on */
616 if (modes_num > 0)
617 mmpfb_power(fbi, 1);
618
619 ret = fb_info_setup(info, fbi);
620 if (ret < 0)
621 goto failed_free_buff;
622
623 ret = register_framebuffer(info);
624 if (ret < 0) {
625 dev_err(&pdev->dev, "Failed to register fb: %d\n", ret);
626 ret = -ENXIO;
627 goto failed_clear_info;
628 }
629
630 dev_info(fbi->dev, "loaded to /dev/fb%d <%s>.\n",
631 info->node, info->fix.id);
632
633 #ifdef CONFIG_LOGO
634 if (fbi->fb_start) {
635 fb_prepare_logo(info, 0);
636 fb_show_logo(info, 0);
637 }
638 #endif
639
640 return 0;
641
642 failed_clear_info:
643 fb_info_clear(info);
644 failed_free_buff:
645 dma_free_coherent(&pdev->dev, PAGE_ALIGN(fbi->fb_size), fbi->fb_start,
646 fbi->fb_start_dma);
647 failed_destroy_mutex:
648 mutex_destroy(&fbi->access_ok);
649 dev_err(fbi->dev, "mmp-fb: frame buffer device init failed\n");
650
651 framebuffer_release(info);
652
653 return ret;
654 }
655
656 static struct platform_driver mmpfb_driver = {
657 .driver = {
658 .name = "mmp-fb",
659 },
660 .probe = mmpfb_probe,
661 };
662
mmpfb_init(void)663 static int mmpfb_init(void)
664 {
665 return platform_driver_register(&mmpfb_driver);
666 }
667 module_init(mmpfb_init);
668
669 MODULE_AUTHOR("Zhou Zhu <zhou.zhu@marvell.com>");
670 MODULE_DESCRIPTION("Framebuffer driver for Marvell displays");
671 MODULE_LICENSE("GPL");
672