1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * linux/drivers/video/omap2/omapfb-main.c
4 *
5 * Copyright (C) 2008 Nokia Corporation
6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
7 *
8 * Some code and ideas taken from drivers/video/omap/ driver
9 * by Imre Deak.
10 */
11
12 #include <linux/module.h>
13 #include <linux/delay.h>
14 #include <linux/slab.h>
15 #include <linux/fb.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/vmalloc.h>
18 #include <linux/device.h>
19 #include <linux/platform_device.h>
20 #include <linux/omapfb.h>
21
22 #include <video/omapfb_dss.h>
23 #include <video/omapvrfb.h>
24
25 #include "omapfb.h"
26
27 #define MODULE_NAME "omapfb"
28
29 #define OMAPFB_PLANE_XRES_MIN 8
30 #define OMAPFB_PLANE_YRES_MIN 8
31
32 static char *def_mode;
33 static char *def_vram;
34 static bool def_vrfb;
35 static int def_rotate;
36 static bool def_mirror;
37 static bool auto_update;
38 static unsigned int auto_update_freq;
39 module_param(auto_update, bool, 0);
40 module_param(auto_update_freq, uint, 0644);
41
42 #ifdef DEBUG
43 bool omapfb_debug;
44 module_param_named(debug, omapfb_debug, bool, 0644);
45 static bool omapfb_test_pattern;
46 module_param_named(test, omapfb_test_pattern, bool, 0644);
47 #endif
48
49 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi);
50 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
51 struct omap_dss_device *dssdev);
52
53 #ifdef DEBUG
draw_pixel(struct fb_info * fbi,int x,int y,unsigned color)54 static void draw_pixel(struct fb_info *fbi, int x, int y, unsigned color)
55 {
56 struct fb_var_screeninfo *var = &fbi->var;
57 struct fb_fix_screeninfo *fix = &fbi->fix;
58 void __iomem *addr = fbi->screen_base;
59 const unsigned bytespp = var->bits_per_pixel >> 3;
60 const unsigned line_len = fix->line_length / bytespp;
61
62 int r = (color >> 16) & 0xff;
63 int g = (color >> 8) & 0xff;
64 int b = (color >> 0) & 0xff;
65
66 if (var->bits_per_pixel == 16) {
67 u16 __iomem *p = (u16 __iomem *)addr;
68 p += y * line_len + x;
69
70 r = r * 32 / 256;
71 g = g * 64 / 256;
72 b = b * 32 / 256;
73
74 __raw_writew((r << 11) | (g << 5) | (b << 0), p);
75 } else if (var->bits_per_pixel == 24) {
76 u8 __iomem *p = (u8 __iomem *)addr;
77 p += (y * line_len + x) * 3;
78
79 __raw_writeb(b, p + 0);
80 __raw_writeb(g, p + 1);
81 __raw_writeb(r, p + 2);
82 } else if (var->bits_per_pixel == 32) {
83 u32 __iomem *p = (u32 __iomem *)addr;
84 p += y * line_len + x;
85 __raw_writel(color, p);
86 }
87 }
88
fill_fb(struct fb_info * fbi)89 static void fill_fb(struct fb_info *fbi)
90 {
91 struct fb_var_screeninfo *var = &fbi->var;
92 const short w = var->xres_virtual;
93 const short h = var->yres_virtual;
94 void __iomem *addr = fbi->screen_base;
95 int y, x;
96
97 if (!addr)
98 return;
99
100 DBG("fill_fb %dx%d, line_len %d bytes\n", w, h, fbi->fix.line_length);
101
102 for (y = 0; y < h; y++) {
103 for (x = 0; x < w; x++) {
104 if (x < 20 && y < 20)
105 draw_pixel(fbi, x, y, 0xffffff);
106 else if (x < 20 && (y > 20 && y < h - 20))
107 draw_pixel(fbi, x, y, 0xff);
108 else if (y < 20 && (x > 20 && x < w - 20))
109 draw_pixel(fbi, x, y, 0xff00);
110 else if (x > w - 20 && (y > 20 && y < h - 20))
111 draw_pixel(fbi, x, y, 0xff0000);
112 else if (y > h - 20 && (x > 20 && x < w - 20))
113 draw_pixel(fbi, x, y, 0xffff00);
114 else if (x == 20 || x == w - 20 ||
115 y == 20 || y == h - 20)
116 draw_pixel(fbi, x, y, 0xffffff);
117 else if (x == y || w - x == h - y)
118 draw_pixel(fbi, x, y, 0xff00ff);
119 else if (w - x == y || x == h - y)
120 draw_pixel(fbi, x, y, 0x00ffff);
121 else if (x > 20 && y > 20 && x < w - 20 && y < h - 20) {
122 int t = x * 3 / w;
123 unsigned r = 0, g = 0, b = 0;
124 unsigned c;
125 if (var->bits_per_pixel == 16) {
126 if (t == 0)
127 b = (y % 32) * 256 / 32;
128 else if (t == 1)
129 g = (y % 64) * 256 / 64;
130 else if (t == 2)
131 r = (y % 32) * 256 / 32;
132 } else {
133 if (t == 0)
134 b = (y % 256);
135 else if (t == 1)
136 g = (y % 256);
137 else if (t == 2)
138 r = (y % 256);
139 }
140 c = (r << 16) | (g << 8) | (b << 0);
141 draw_pixel(fbi, x, y, c);
142 } else {
143 draw_pixel(fbi, x, y, 0);
144 }
145 }
146 }
147 }
148 #endif
149
omapfb_get_vrfb_offset(const struct omapfb_info * ofbi,int rot)150 static unsigned omapfb_get_vrfb_offset(const struct omapfb_info *ofbi, int rot)
151 {
152 const struct vrfb *vrfb = &ofbi->region->vrfb;
153 unsigned offset;
154
155 switch (rot) {
156 case FB_ROTATE_UR:
157 offset = 0;
158 break;
159 case FB_ROTATE_CW:
160 offset = vrfb->yoffset;
161 break;
162 case FB_ROTATE_UD:
163 offset = vrfb->yoffset * OMAP_VRFB_LINE_LEN + vrfb->xoffset;
164 break;
165 case FB_ROTATE_CCW:
166 offset = vrfb->xoffset * OMAP_VRFB_LINE_LEN;
167 break;
168 default:
169 BUG();
170 return 0;
171 }
172
173 offset *= vrfb->bytespp;
174
175 return offset;
176 }
177
omapfb_get_region_rot_paddr(const struct omapfb_info * ofbi,int rot)178 static u32 omapfb_get_region_rot_paddr(const struct omapfb_info *ofbi, int rot)
179 {
180 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
181 return ofbi->region->vrfb.paddr[rot]
182 + omapfb_get_vrfb_offset(ofbi, rot);
183 } else {
184 return ofbi->region->paddr;
185 }
186 }
187
omapfb_get_region_paddr(const struct omapfb_info * ofbi)188 static u32 omapfb_get_region_paddr(const struct omapfb_info *ofbi)
189 {
190 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
191 return ofbi->region->vrfb.paddr[0];
192 else
193 return ofbi->region->paddr;
194 }
195
omapfb_get_region_vaddr(const struct omapfb_info * ofbi)196 static void __iomem *omapfb_get_region_vaddr(const struct omapfb_info *ofbi)
197 {
198 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
199 return ofbi->region->vrfb.vaddr[0];
200 else
201 return ofbi->region->vaddr;
202 }
203
204 static struct omapfb_colormode omapfb_colormodes[] = {
205 {
206 .dssmode = OMAP_DSS_COLOR_UYVY,
207 .bits_per_pixel = 16,
208 .nonstd = OMAPFB_COLOR_YUV422,
209 }, {
210 .dssmode = OMAP_DSS_COLOR_YUV2,
211 .bits_per_pixel = 16,
212 .nonstd = OMAPFB_COLOR_YUY422,
213 }, {
214 .dssmode = OMAP_DSS_COLOR_ARGB16,
215 .bits_per_pixel = 16,
216 .red = { .length = 4, .offset = 8, .msb_right = 0 },
217 .green = { .length = 4, .offset = 4, .msb_right = 0 },
218 .blue = { .length = 4, .offset = 0, .msb_right = 0 },
219 .transp = { .length = 4, .offset = 12, .msb_right = 0 },
220 }, {
221 .dssmode = OMAP_DSS_COLOR_RGB16,
222 .bits_per_pixel = 16,
223 .red = { .length = 5, .offset = 11, .msb_right = 0 },
224 .green = { .length = 6, .offset = 5, .msb_right = 0 },
225 .blue = { .length = 5, .offset = 0, .msb_right = 0 },
226 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
227 }, {
228 .dssmode = OMAP_DSS_COLOR_RGB24P,
229 .bits_per_pixel = 24,
230 .red = { .length = 8, .offset = 16, .msb_right = 0 },
231 .green = { .length = 8, .offset = 8, .msb_right = 0 },
232 .blue = { .length = 8, .offset = 0, .msb_right = 0 },
233 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
234 }, {
235 .dssmode = OMAP_DSS_COLOR_RGB24U,
236 .bits_per_pixel = 32,
237 .red = { .length = 8, .offset = 16, .msb_right = 0 },
238 .green = { .length = 8, .offset = 8, .msb_right = 0 },
239 .blue = { .length = 8, .offset = 0, .msb_right = 0 },
240 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
241 }, {
242 .dssmode = OMAP_DSS_COLOR_ARGB32,
243 .bits_per_pixel = 32,
244 .red = { .length = 8, .offset = 16, .msb_right = 0 },
245 .green = { .length = 8, .offset = 8, .msb_right = 0 },
246 .blue = { .length = 8, .offset = 0, .msb_right = 0 },
247 .transp = { .length = 8, .offset = 24, .msb_right = 0 },
248 }, {
249 .dssmode = OMAP_DSS_COLOR_RGBA32,
250 .bits_per_pixel = 32,
251 .red = { .length = 8, .offset = 24, .msb_right = 0 },
252 .green = { .length = 8, .offset = 16, .msb_right = 0 },
253 .blue = { .length = 8, .offset = 8, .msb_right = 0 },
254 .transp = { .length = 8, .offset = 0, .msb_right = 0 },
255 }, {
256 .dssmode = OMAP_DSS_COLOR_RGBX32,
257 .bits_per_pixel = 32,
258 .red = { .length = 8, .offset = 24, .msb_right = 0 },
259 .green = { .length = 8, .offset = 16, .msb_right = 0 },
260 .blue = { .length = 8, .offset = 8, .msb_right = 0 },
261 .transp = { .length = 0, .offset = 0, .msb_right = 0 },
262 },
263 };
264
cmp_component(struct fb_bitfield * f1,struct fb_bitfield * f2)265 static bool cmp_component(struct fb_bitfield *f1, struct fb_bitfield *f2)
266 {
267 return f1->length == f2->length &&
268 f1->offset == f2->offset &&
269 f1->msb_right == f2->msb_right;
270 }
271
cmp_var_to_colormode(struct fb_var_screeninfo * var,struct omapfb_colormode * color)272 static bool cmp_var_to_colormode(struct fb_var_screeninfo *var,
273 struct omapfb_colormode *color)
274 {
275 if (var->bits_per_pixel == 0 ||
276 var->red.length == 0 ||
277 var->blue.length == 0 ||
278 var->green.length == 0)
279 return false;
280
281 return var->bits_per_pixel == color->bits_per_pixel &&
282 cmp_component(&var->red, &color->red) &&
283 cmp_component(&var->green, &color->green) &&
284 cmp_component(&var->blue, &color->blue) &&
285 cmp_component(&var->transp, &color->transp);
286 }
287
assign_colormode_to_var(struct fb_var_screeninfo * var,struct omapfb_colormode * color)288 static void assign_colormode_to_var(struct fb_var_screeninfo *var,
289 struct omapfb_colormode *color)
290 {
291 var->bits_per_pixel = color->bits_per_pixel;
292 var->nonstd = color->nonstd;
293 var->red = color->red;
294 var->green = color->green;
295 var->blue = color->blue;
296 var->transp = color->transp;
297 }
298
fb_mode_to_dss_mode(struct fb_var_screeninfo * var,enum omap_color_mode * mode)299 static int fb_mode_to_dss_mode(struct fb_var_screeninfo *var,
300 enum omap_color_mode *mode)
301 {
302 enum omap_color_mode dssmode;
303 int i;
304
305 /* first match with nonstd field */
306 if (var->nonstd) {
307 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
308 struct omapfb_colormode *m = &omapfb_colormodes[i];
309 if (var->nonstd == m->nonstd) {
310 assign_colormode_to_var(var, m);
311 *mode = m->dssmode;
312 return 0;
313 }
314 }
315
316 return -EINVAL;
317 }
318
319 /* then try exact match of bpp and colors */
320 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
321 struct omapfb_colormode *m = &omapfb_colormodes[i];
322 if (cmp_var_to_colormode(var, m)) {
323 assign_colormode_to_var(var, m);
324 *mode = m->dssmode;
325 return 0;
326 }
327 }
328
329 /* match with bpp if user has not filled color fields
330 * properly */
331 switch (var->bits_per_pixel) {
332 case 1:
333 dssmode = OMAP_DSS_COLOR_CLUT1;
334 break;
335 case 2:
336 dssmode = OMAP_DSS_COLOR_CLUT2;
337 break;
338 case 4:
339 dssmode = OMAP_DSS_COLOR_CLUT4;
340 break;
341 case 8:
342 dssmode = OMAP_DSS_COLOR_CLUT8;
343 break;
344 case 12:
345 dssmode = OMAP_DSS_COLOR_RGB12U;
346 break;
347 case 16:
348 dssmode = OMAP_DSS_COLOR_RGB16;
349 break;
350 case 24:
351 dssmode = OMAP_DSS_COLOR_RGB24P;
352 break;
353 case 32:
354 dssmode = OMAP_DSS_COLOR_RGB24U;
355 break;
356 default:
357 return -EINVAL;
358 }
359
360 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
361 struct omapfb_colormode *m = &omapfb_colormodes[i];
362 if (dssmode == m->dssmode) {
363 assign_colormode_to_var(var, m);
364 *mode = m->dssmode;
365 return 0;
366 }
367 }
368
369 return -EINVAL;
370 }
371
check_fb_res_bounds(struct fb_var_screeninfo * var)372 static int check_fb_res_bounds(struct fb_var_screeninfo *var)
373 {
374 int xres_min = OMAPFB_PLANE_XRES_MIN;
375 int xres_max = 2048;
376 int yres_min = OMAPFB_PLANE_YRES_MIN;
377 int yres_max = 2048;
378
379 /* XXX: some applications seem to set virtual res to 0. */
380 if (var->xres_virtual == 0)
381 var->xres_virtual = var->xres;
382
383 if (var->yres_virtual == 0)
384 var->yres_virtual = var->yres;
385
386 if (var->xres_virtual < xres_min || var->yres_virtual < yres_min)
387 return -EINVAL;
388
389 if (var->xres < xres_min)
390 var->xres = xres_min;
391 if (var->yres < yres_min)
392 var->yres = yres_min;
393 if (var->xres > xres_max)
394 var->xres = xres_max;
395 if (var->yres > yres_max)
396 var->yres = yres_max;
397
398 if (var->xres > var->xres_virtual)
399 var->xres = var->xres_virtual;
400 if (var->yres > var->yres_virtual)
401 var->yres = var->yres_virtual;
402
403 return 0;
404 }
405
shrink_height(unsigned long max_frame_size,struct fb_var_screeninfo * var)406 static void shrink_height(unsigned long max_frame_size,
407 struct fb_var_screeninfo *var)
408 {
409 DBG("can't fit FB into memory, reducing y\n");
410 var->yres_virtual = max_frame_size /
411 (var->xres_virtual * var->bits_per_pixel >> 3);
412
413 if (var->yres_virtual < OMAPFB_PLANE_YRES_MIN)
414 var->yres_virtual = OMAPFB_PLANE_YRES_MIN;
415
416 if (var->yres > var->yres_virtual)
417 var->yres = var->yres_virtual;
418 }
419
shrink_width(unsigned long max_frame_size,struct fb_var_screeninfo * var)420 static void shrink_width(unsigned long max_frame_size,
421 struct fb_var_screeninfo *var)
422 {
423 DBG("can't fit FB into memory, reducing x\n");
424 var->xres_virtual = max_frame_size / var->yres_virtual /
425 (var->bits_per_pixel >> 3);
426
427 if (var->xres_virtual < OMAPFB_PLANE_XRES_MIN)
428 var->xres_virtual = OMAPFB_PLANE_XRES_MIN;
429
430 if (var->xres > var->xres_virtual)
431 var->xres = var->xres_virtual;
432 }
433
check_vrfb_fb_size(unsigned long region_size,const struct fb_var_screeninfo * var)434 static int check_vrfb_fb_size(unsigned long region_size,
435 const struct fb_var_screeninfo *var)
436 {
437 unsigned long min_phys_size = omap_vrfb_min_phys_size(var->xres_virtual,
438 var->yres_virtual, var->bits_per_pixel >> 3);
439
440 return min_phys_size > region_size ? -EINVAL : 0;
441 }
442
check_fb_size(const struct omapfb_info * ofbi,struct fb_var_screeninfo * var)443 static int check_fb_size(const struct omapfb_info *ofbi,
444 struct fb_var_screeninfo *var)
445 {
446 unsigned long max_frame_size = ofbi->region->size;
447 int bytespp = var->bits_per_pixel >> 3;
448 unsigned long line_size = var->xres_virtual * bytespp;
449
450 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
451 /* One needs to check for both VRFB and OMAPFB limitations. */
452 if (check_vrfb_fb_size(max_frame_size, var))
453 shrink_height(omap_vrfb_max_height(
454 max_frame_size, var->xres_virtual, bytespp) *
455 line_size, var);
456
457 if (check_vrfb_fb_size(max_frame_size, var)) {
458 DBG("cannot fit FB to memory\n");
459 return -EINVAL;
460 }
461
462 return 0;
463 }
464
465 DBG("max frame size %lu, line size %lu\n", max_frame_size, line_size);
466
467 if (line_size * var->yres_virtual > max_frame_size)
468 shrink_height(max_frame_size, var);
469
470 if (line_size * var->yres_virtual > max_frame_size) {
471 shrink_width(max_frame_size, var);
472 line_size = var->xres_virtual * bytespp;
473 }
474
475 if (line_size * var->yres_virtual > max_frame_size) {
476 DBG("cannot fit FB to memory\n");
477 return -EINVAL;
478 }
479
480 return 0;
481 }
482
483 /*
484 * Consider if VRFB assisted rotation is in use and if the virtual space for
485 * the zero degree view needs to be mapped. The need for mapping also acts as
486 * the trigger for setting up the hardware on the context in question. This
487 * ensures that one does not attempt to access the virtual view before the
488 * hardware is serving the address translations.
489 */
setup_vrfb_rotation(struct fb_info * fbi)490 static int setup_vrfb_rotation(struct fb_info *fbi)
491 {
492 struct omapfb_info *ofbi = FB2OFB(fbi);
493 struct omapfb2_mem_region *rg = ofbi->region;
494 struct vrfb *vrfb = &rg->vrfb;
495 struct fb_var_screeninfo *var = &fbi->var;
496 struct fb_fix_screeninfo *fix = &fbi->fix;
497 unsigned bytespp;
498 bool yuv_mode;
499 enum omap_color_mode mode;
500 int r;
501 bool reconf;
502
503 if (!rg->size || ofbi->rotation_type != OMAP_DSS_ROT_VRFB)
504 return 0;
505
506 DBG("setup_vrfb_rotation\n");
507
508 r = fb_mode_to_dss_mode(var, &mode);
509 if (r)
510 return r;
511
512 bytespp = var->bits_per_pixel >> 3;
513
514 yuv_mode = mode == OMAP_DSS_COLOR_YUV2 || mode == OMAP_DSS_COLOR_UYVY;
515
516 /* We need to reconfigure VRFB if the resolution changes, if yuv mode
517 * is enabled/disabled, or if bytes per pixel changes */
518
519 /* XXX we shouldn't allow this when framebuffer is mmapped */
520
521 reconf = false;
522
523 if (yuv_mode != vrfb->yuv_mode)
524 reconf = true;
525 else if (bytespp != vrfb->bytespp)
526 reconf = true;
527 else if (vrfb->xres != var->xres_virtual ||
528 vrfb->yres != var->yres_virtual)
529 reconf = true;
530
531 if (vrfb->vaddr[0] && reconf) {
532 fbi->screen_base = NULL;
533 fix->smem_start = 0;
534 fix->smem_len = 0;
535 iounmap(vrfb->vaddr[0]);
536 vrfb->vaddr[0] = NULL;
537 DBG("setup_vrfb_rotation: reset fb\n");
538 }
539
540 if (vrfb->vaddr[0])
541 return 0;
542
543 omap_vrfb_setup(&rg->vrfb, rg->paddr,
544 var->xres_virtual,
545 var->yres_virtual,
546 bytespp, yuv_mode);
547
548 /* Now one can ioremap the 0 angle view */
549 r = omap_vrfb_map_angle(vrfb, var->yres_virtual, 0);
550 if (r)
551 return r;
552
553 /* used by open/write in fbmem.c */
554 fbi->screen_base = ofbi->region->vrfb.vaddr[0];
555
556 fix->smem_start = ofbi->region->vrfb.paddr[0];
557
558 switch (var->nonstd) {
559 case OMAPFB_COLOR_YUV422:
560 case OMAPFB_COLOR_YUY422:
561 fix->line_length =
562 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
563 break;
564 default:
565 fix->line_length =
566 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
567 break;
568 }
569
570 fix->smem_len = var->yres_virtual * fix->line_length;
571
572 return 0;
573 }
574
dss_mode_to_fb_mode(enum omap_color_mode dssmode,struct fb_var_screeninfo * var)575 int dss_mode_to_fb_mode(enum omap_color_mode dssmode,
576 struct fb_var_screeninfo *var)
577 {
578 int i;
579
580 for (i = 0; i < ARRAY_SIZE(omapfb_colormodes); ++i) {
581 struct omapfb_colormode *mode = &omapfb_colormodes[i];
582 if (dssmode == mode->dssmode) {
583 assign_colormode_to_var(var, mode);
584 return 0;
585 }
586 }
587 return -ENOENT;
588 }
589
set_fb_fix(struct fb_info * fbi)590 void set_fb_fix(struct fb_info *fbi)
591 {
592 struct fb_fix_screeninfo *fix = &fbi->fix;
593 struct fb_var_screeninfo *var = &fbi->var;
594 struct omapfb_info *ofbi = FB2OFB(fbi);
595 struct omapfb2_mem_region *rg = ofbi->region;
596
597 DBG("set_fb_fix\n");
598
599 /* used by open/write in fbmem.c */
600 fbi->screen_base = (char __iomem *)omapfb_get_region_vaddr(ofbi);
601
602 /* used by mmap in fbmem.c */
603 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
604 switch (var->nonstd) {
605 case OMAPFB_COLOR_YUV422:
606 case OMAPFB_COLOR_YUY422:
607 fix->line_length =
608 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 2;
609 break;
610 default:
611 fix->line_length =
612 (OMAP_VRFB_LINE_LEN * var->bits_per_pixel) >> 3;
613 break;
614 }
615
616 fix->smem_len = var->yres_virtual * fix->line_length;
617 } else {
618 fix->line_length =
619 (var->xres_virtual * var->bits_per_pixel) >> 3;
620 fix->smem_len = rg->size;
621 }
622
623 fix->smem_start = omapfb_get_region_paddr(ofbi);
624
625 fix->type = FB_TYPE_PACKED_PIXELS;
626
627 if (var->nonstd)
628 fix->visual = FB_VISUAL_PSEUDOCOLOR;
629 else {
630 switch (var->bits_per_pixel) {
631 case 32:
632 case 24:
633 case 16:
634 case 12:
635 fix->visual = FB_VISUAL_TRUECOLOR;
636 /* 12bpp is stored in 16 bits */
637 break;
638 case 1:
639 case 2:
640 case 4:
641 case 8:
642 fix->visual = FB_VISUAL_PSEUDOCOLOR;
643 break;
644 }
645 }
646
647 fix->accel = FB_ACCEL_NONE;
648
649 fix->xpanstep = 1;
650 fix->ypanstep = 1;
651 }
652
653 /* check new var and possibly modify it to be ok */
check_fb_var(struct fb_info * fbi,struct fb_var_screeninfo * var)654 int check_fb_var(struct fb_info *fbi, struct fb_var_screeninfo *var)
655 {
656 struct omapfb_info *ofbi = FB2OFB(fbi);
657 struct omap_dss_device *display = fb2display(fbi);
658 enum omap_color_mode mode = 0;
659 int i;
660 int r;
661
662 DBG("check_fb_var %d\n", ofbi->id);
663
664 WARN_ON(!atomic_read(&ofbi->region->lock_count));
665
666 r = fb_mode_to_dss_mode(var, &mode);
667 if (r) {
668 DBG("cannot convert var to omap dss mode\n");
669 return r;
670 }
671
672 for (i = 0; i < ofbi->num_overlays; ++i) {
673 if ((ofbi->overlays[i]->supported_modes & mode) == 0) {
674 DBG("invalid mode\n");
675 return -EINVAL;
676 }
677 }
678
679 if (var->rotate > 3)
680 return -EINVAL;
681
682 if (check_fb_res_bounds(var))
683 return -EINVAL;
684
685 /* When no memory is allocated ignore the size check */
686 if (ofbi->region->size != 0 && check_fb_size(ofbi, var))
687 return -EINVAL;
688
689 if (var->xres + var->xoffset > var->xres_virtual)
690 var->xoffset = var->xres_virtual - var->xres;
691 if (var->yres + var->yoffset > var->yres_virtual)
692 var->yoffset = var->yres_virtual - var->yres;
693
694 DBG("xres = %d, yres = %d, vxres = %d, vyres = %d\n",
695 var->xres, var->yres,
696 var->xres_virtual, var->yres_virtual);
697
698 if (display && display->driver->get_dimensions) {
699 u32 w, h;
700 display->driver->get_dimensions(display, &w, &h);
701 var->width = DIV_ROUND_CLOSEST(w, 1000);
702 var->height = DIV_ROUND_CLOSEST(h, 1000);
703 } else {
704 var->height = -1;
705 var->width = -1;
706 }
707
708 var->grayscale = 0;
709
710 if (display && display->driver->get_timings) {
711 struct omap_video_timings timings;
712 display->driver->get_timings(display, &timings);
713
714 /* pixclock in ps, the rest in pixclock */
715 var->pixclock = timings.pixelclock != 0 ?
716 KHZ2PICOS(timings.pixelclock / 1000) :
717 0;
718 var->left_margin = timings.hbp;
719 var->right_margin = timings.hfp;
720 var->upper_margin = timings.vbp;
721 var->lower_margin = timings.vfp;
722 var->hsync_len = timings.hsw;
723 var->vsync_len = timings.vsw;
724 var->sync |= timings.hsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
725 FB_SYNC_HOR_HIGH_ACT : 0;
726 var->sync |= timings.vsync_level == OMAPDSS_SIG_ACTIVE_HIGH ?
727 FB_SYNC_VERT_HIGH_ACT : 0;
728 var->vmode = timings.interlace ?
729 FB_VMODE_INTERLACED : FB_VMODE_NONINTERLACED;
730 } else {
731 var->pixclock = 0;
732 var->left_margin = 0;
733 var->right_margin = 0;
734 var->upper_margin = 0;
735 var->lower_margin = 0;
736 var->hsync_len = 0;
737 var->vsync_len = 0;
738 var->sync = 0;
739 var->vmode = FB_VMODE_NONINTERLACED;
740 }
741
742 return 0;
743 }
744
745 /*
746 * ---------------------------------------------------------------------------
747 * fbdev framework callbacks
748 * ---------------------------------------------------------------------------
749 */
omapfb_open(struct fb_info * fbi,int user)750 static int omapfb_open(struct fb_info *fbi, int user)
751 {
752 return 0;
753 }
754
omapfb_release(struct fb_info * fbi,int user)755 static int omapfb_release(struct fb_info *fbi, int user)
756 {
757 return 0;
758 }
759
calc_rotation_offset_dma(const struct fb_var_screeninfo * var,const struct fb_fix_screeninfo * fix,int rotation)760 static unsigned calc_rotation_offset_dma(const struct fb_var_screeninfo *var,
761 const struct fb_fix_screeninfo *fix, int rotation)
762 {
763 unsigned offset;
764
765 offset = var->yoffset * fix->line_length +
766 var->xoffset * (var->bits_per_pixel >> 3);
767
768 return offset;
769 }
770
calc_rotation_offset_vrfb(const struct fb_var_screeninfo * var,const struct fb_fix_screeninfo * fix,int rotation)771 static unsigned calc_rotation_offset_vrfb(const struct fb_var_screeninfo *var,
772 const struct fb_fix_screeninfo *fix, int rotation)
773 {
774 unsigned offset;
775
776 if (rotation == FB_ROTATE_UD)
777 offset = (var->yres_virtual - var->yres) *
778 fix->line_length;
779 else if (rotation == FB_ROTATE_CW)
780 offset = (var->yres_virtual - var->yres) *
781 (var->bits_per_pixel >> 3);
782 else
783 offset = 0;
784
785 if (rotation == FB_ROTATE_UR)
786 offset += var->yoffset * fix->line_length +
787 var->xoffset * (var->bits_per_pixel >> 3);
788 else if (rotation == FB_ROTATE_UD)
789 offset -= var->yoffset * fix->line_length +
790 var->xoffset * (var->bits_per_pixel >> 3);
791 else if (rotation == FB_ROTATE_CW)
792 offset -= var->xoffset * fix->line_length +
793 var->yoffset * (var->bits_per_pixel >> 3);
794 else if (rotation == FB_ROTATE_CCW)
795 offset += var->xoffset * fix->line_length +
796 var->yoffset * (var->bits_per_pixel >> 3);
797
798 return offset;
799 }
800
omapfb_calc_addr(const struct omapfb_info * ofbi,const struct fb_var_screeninfo * var,const struct fb_fix_screeninfo * fix,int rotation,u32 * paddr)801 static void omapfb_calc_addr(const struct omapfb_info *ofbi,
802 const struct fb_var_screeninfo *var,
803 const struct fb_fix_screeninfo *fix,
804 int rotation, u32 *paddr)
805 {
806 u32 data_start_p;
807 int offset;
808
809 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
810 data_start_p = omapfb_get_region_rot_paddr(ofbi, rotation);
811 else
812 data_start_p = omapfb_get_region_paddr(ofbi);
813
814 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
815 offset = calc_rotation_offset_vrfb(var, fix, rotation);
816 else
817 offset = calc_rotation_offset_dma(var, fix, rotation);
818
819 data_start_p += offset;
820
821 if (offset)
822 DBG("offset %d, %d = %d\n",
823 var->xoffset, var->yoffset, offset);
824
825 DBG("paddr %x\n", data_start_p);
826
827 *paddr = data_start_p;
828 }
829
830 /* setup overlay according to the fb */
omapfb_setup_overlay(struct fb_info * fbi,struct omap_overlay * ovl,u16 posx,u16 posy,u16 outw,u16 outh)831 int omapfb_setup_overlay(struct fb_info *fbi, struct omap_overlay *ovl,
832 u16 posx, u16 posy, u16 outw, u16 outh)
833 {
834 int r = 0;
835 struct omapfb_info *ofbi = FB2OFB(fbi);
836 struct fb_var_screeninfo *var = &fbi->var;
837 struct fb_fix_screeninfo *fix = &fbi->fix;
838 enum omap_color_mode mode = 0;
839 u32 data_start_p = 0;
840 struct omap_overlay_info info;
841 int xres, yres;
842 int screen_width;
843 int mirror;
844 int rotation = var->rotate;
845 int i;
846
847 WARN_ON(!atomic_read(&ofbi->region->lock_count));
848
849 for (i = 0; i < ofbi->num_overlays; i++) {
850 if (ovl != ofbi->overlays[i])
851 continue;
852
853 rotation = (rotation + ofbi->rotation[i]) % 4;
854 break;
855 }
856
857 DBG("setup_overlay %d, posx %d, posy %d, outw %d, outh %d\n", ofbi->id,
858 posx, posy, outw, outh);
859
860 if (rotation == FB_ROTATE_CW || rotation == FB_ROTATE_CCW) {
861 xres = var->yres;
862 yres = var->xres;
863 } else {
864 xres = var->xres;
865 yres = var->yres;
866 }
867
868 if (ofbi->region->size)
869 omapfb_calc_addr(ofbi, var, fix, rotation, &data_start_p);
870
871 r = fb_mode_to_dss_mode(var, &mode);
872 if (r) {
873 DBG("fb_mode_to_dss_mode failed");
874 goto err;
875 }
876
877 switch (var->nonstd) {
878 case OMAPFB_COLOR_YUV422:
879 case OMAPFB_COLOR_YUY422:
880 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
881 screen_width = fix->line_length
882 / (var->bits_per_pixel >> 2);
883 break;
884 }
885 fallthrough;
886 default:
887 screen_width = fix->line_length / (var->bits_per_pixel >> 3);
888 break;
889 }
890
891 ovl->get_overlay_info(ovl, &info);
892
893 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
894 mirror = 0;
895 else
896 mirror = ofbi->mirror;
897
898 info.paddr = data_start_p;
899 info.screen_width = screen_width;
900 info.width = xres;
901 info.height = yres;
902 info.color_mode = mode;
903 info.rotation_type = ofbi->rotation_type;
904 info.rotation = rotation;
905 info.mirror = mirror;
906
907 info.pos_x = posx;
908 info.pos_y = posy;
909 info.out_width = outw;
910 info.out_height = outh;
911
912 r = ovl->set_overlay_info(ovl, &info);
913 if (r) {
914 DBG("ovl->setup_overlay_info failed\n");
915 goto err;
916 }
917
918 return 0;
919
920 err:
921 DBG("setup_overlay failed\n");
922 return r;
923 }
924
925 /* apply var to the overlay */
omapfb_apply_changes(struct fb_info * fbi,int init)926 int omapfb_apply_changes(struct fb_info *fbi, int init)
927 {
928 int r = 0;
929 struct omapfb_info *ofbi = FB2OFB(fbi);
930 struct fb_var_screeninfo *var = &fbi->var;
931 struct omap_overlay *ovl;
932 u16 posx, posy;
933 u16 outw, outh;
934 int i;
935
936 #ifdef DEBUG
937 if (omapfb_test_pattern)
938 fill_fb(fbi);
939 #endif
940
941 WARN_ON(!atomic_read(&ofbi->region->lock_count));
942
943 for (i = 0; i < ofbi->num_overlays; i++) {
944 ovl = ofbi->overlays[i];
945
946 DBG("apply_changes, fb %d, ovl %d\n", ofbi->id, ovl->id);
947
948 if (ofbi->region->size == 0) {
949 /* the fb is not available. disable the overlay */
950 omapfb_overlay_enable(ovl, 0);
951 if (!init && ovl->manager)
952 ovl->manager->apply(ovl->manager);
953 continue;
954 }
955
956 if (init || (ovl->caps & OMAP_DSS_OVL_CAP_SCALE) == 0) {
957 int rotation = (var->rotate + ofbi->rotation[i]) % 4;
958 if (rotation == FB_ROTATE_CW ||
959 rotation == FB_ROTATE_CCW) {
960 outw = var->yres;
961 outh = var->xres;
962 } else {
963 outw = var->xres;
964 outh = var->yres;
965 }
966 } else {
967 struct omap_overlay_info info;
968 ovl->get_overlay_info(ovl, &info);
969 outw = info.out_width;
970 outh = info.out_height;
971 }
972
973 if (init) {
974 posx = 0;
975 posy = 0;
976 } else {
977 struct omap_overlay_info info;
978 ovl->get_overlay_info(ovl, &info);
979 posx = info.pos_x;
980 posy = info.pos_y;
981 }
982
983 r = omapfb_setup_overlay(fbi, ovl, posx, posy, outw, outh);
984 if (r)
985 goto err;
986
987 if (!init && ovl->manager)
988 ovl->manager->apply(ovl->manager);
989 }
990 return 0;
991 err:
992 DBG("apply_changes failed\n");
993 return r;
994 }
995
996 /* checks var and eventually tweaks it to something supported,
997 * DO NOT MODIFY PAR */
omapfb_check_var(struct fb_var_screeninfo * var,struct fb_info * fbi)998 static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
999 {
1000 struct omapfb_info *ofbi = FB2OFB(fbi);
1001 int r;
1002
1003 DBG("check_var(%d)\n", FB2OFB(fbi)->id);
1004
1005 omapfb_get_mem_region(ofbi->region);
1006
1007 r = check_fb_var(fbi, var);
1008
1009 omapfb_put_mem_region(ofbi->region);
1010
1011 return r;
1012 }
1013
1014 /* set the video mode according to info->var */
omapfb_set_par(struct fb_info * fbi)1015 static int omapfb_set_par(struct fb_info *fbi)
1016 {
1017 struct omapfb_info *ofbi = FB2OFB(fbi);
1018 int r;
1019
1020 DBG("set_par(%d)\n", FB2OFB(fbi)->id);
1021
1022 omapfb_get_mem_region(ofbi->region);
1023
1024 set_fb_fix(fbi);
1025
1026 r = setup_vrfb_rotation(fbi);
1027 if (r)
1028 goto out;
1029
1030 r = omapfb_apply_changes(fbi, 0);
1031
1032 out:
1033 omapfb_put_mem_region(ofbi->region);
1034
1035 return r;
1036 }
1037
omapfb_pan_display(struct fb_var_screeninfo * var,struct fb_info * fbi)1038 static int omapfb_pan_display(struct fb_var_screeninfo *var,
1039 struct fb_info *fbi)
1040 {
1041 struct omapfb_info *ofbi = FB2OFB(fbi);
1042 struct fb_var_screeninfo new_var;
1043 int r;
1044
1045 DBG("pan_display(%d)\n", FB2OFB(fbi)->id);
1046
1047 if (var->xoffset == fbi->var.xoffset &&
1048 var->yoffset == fbi->var.yoffset)
1049 return 0;
1050
1051 new_var = fbi->var;
1052 new_var.xoffset = var->xoffset;
1053 new_var.yoffset = var->yoffset;
1054
1055 fbi->var = new_var;
1056
1057 omapfb_get_mem_region(ofbi->region);
1058
1059 r = omapfb_apply_changes(fbi, 0);
1060
1061 omapfb_put_mem_region(ofbi->region);
1062
1063 return r;
1064 }
1065
mmap_user_open(struct vm_area_struct * vma)1066 static void mmap_user_open(struct vm_area_struct *vma)
1067 {
1068 struct omapfb2_mem_region *rg = vma->vm_private_data;
1069
1070 omapfb_get_mem_region(rg);
1071 atomic_inc(&rg->map_count);
1072 omapfb_put_mem_region(rg);
1073 }
1074
mmap_user_close(struct vm_area_struct * vma)1075 static void mmap_user_close(struct vm_area_struct *vma)
1076 {
1077 struct omapfb2_mem_region *rg = vma->vm_private_data;
1078
1079 omapfb_get_mem_region(rg);
1080 atomic_dec(&rg->map_count);
1081 omapfb_put_mem_region(rg);
1082 }
1083
1084 static const struct vm_operations_struct mmap_user_ops = {
1085 .open = mmap_user_open,
1086 .close = mmap_user_close,
1087 };
1088
omapfb_mmap(struct fb_info * fbi,struct vm_area_struct * vma)1089 static int omapfb_mmap(struct fb_info *fbi, struct vm_area_struct *vma)
1090 {
1091 struct omapfb_info *ofbi = FB2OFB(fbi);
1092 struct fb_fix_screeninfo *fix = &fbi->fix;
1093 struct omapfb2_mem_region *rg;
1094 unsigned long start;
1095 u32 len;
1096 int r;
1097
1098 rg = omapfb_get_mem_region(ofbi->region);
1099
1100 start = omapfb_get_region_paddr(ofbi);
1101 len = fix->smem_len;
1102
1103 DBG("user mmap region start %lx, len %d, off %lx\n", start, len,
1104 vma->vm_pgoff << PAGE_SHIFT);
1105
1106 vma->vm_page_prot = pgprot_writecombine(vma->vm_page_prot);
1107 vma->vm_ops = &mmap_user_ops;
1108 vma->vm_private_data = rg;
1109
1110 r = vm_iomap_memory(vma, start, len);
1111 if (r)
1112 goto error;
1113
1114 /* vm_ops.open won't be called for mmap itself. */
1115 atomic_inc(&rg->map_count);
1116
1117 omapfb_put_mem_region(rg);
1118
1119 return 0;
1120
1121 error:
1122 omapfb_put_mem_region(ofbi->region);
1123
1124 return r;
1125 }
1126
1127 /* Store a single color palette entry into a pseudo palette or the hardware
1128 * palette if one is available. For now we support only 16bpp and thus store
1129 * the entry only to the pseudo palette.
1130 */
_setcolreg(struct fb_info * fbi,u_int regno,u_int red,u_int green,u_int blue,u_int transp,int update_hw_pal)1131 static int _setcolreg(struct fb_info *fbi, u_int regno, u_int red, u_int green,
1132 u_int blue, u_int transp, int update_hw_pal)
1133 {
1134 /*struct omapfb_info *ofbi = FB2OFB(fbi);*/
1135 /*struct omapfb2_device *fbdev = ofbi->fbdev;*/
1136 struct fb_var_screeninfo *var = &fbi->var;
1137 int r = 0;
1138
1139 enum omapfb_color_format mode = OMAPFB_COLOR_RGB24U; /* XXX */
1140
1141 /*switch (plane->color_mode) {*/
1142 switch (mode) {
1143 case OMAPFB_COLOR_YUV422:
1144 case OMAPFB_COLOR_YUV420:
1145 case OMAPFB_COLOR_YUY422:
1146 r = -EINVAL;
1147 break;
1148 case OMAPFB_COLOR_CLUT_8BPP:
1149 case OMAPFB_COLOR_CLUT_4BPP:
1150 case OMAPFB_COLOR_CLUT_2BPP:
1151 case OMAPFB_COLOR_CLUT_1BPP:
1152 /*
1153 if (fbdev->ctrl->setcolreg)
1154 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
1155 transp, update_hw_pal);
1156 */
1157 r = -EINVAL;
1158 break;
1159 case OMAPFB_COLOR_RGB565:
1160 case OMAPFB_COLOR_RGB444:
1161 case OMAPFB_COLOR_RGB24P:
1162 case OMAPFB_COLOR_RGB24U:
1163 if (regno < 16) {
1164 u32 pal;
1165 pal = ((red >> (16 - var->red.length)) <<
1166 var->red.offset) |
1167 ((green >> (16 - var->green.length)) <<
1168 var->green.offset) |
1169 (blue >> (16 - var->blue.length));
1170 ((u32 *)(fbi->pseudo_palette))[regno] = pal;
1171 }
1172 break;
1173 default:
1174 BUG();
1175 }
1176 return r;
1177 }
1178
omapfb_setcolreg(u_int regno,u_int red,u_int green,u_int blue,u_int transp,struct fb_info * info)1179 static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
1180 u_int transp, struct fb_info *info)
1181 {
1182 DBG("setcolreg\n");
1183
1184 return _setcolreg(info, regno, red, green, blue, transp, 1);
1185 }
1186
omapfb_setcmap(struct fb_cmap * cmap,struct fb_info * info)1187 static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
1188 {
1189 int count, index, r;
1190 u16 *red, *green, *blue, *transp;
1191 u16 trans = 0xffff;
1192
1193 DBG("setcmap\n");
1194
1195 red = cmap->red;
1196 green = cmap->green;
1197 blue = cmap->blue;
1198 transp = cmap->transp;
1199 index = cmap->start;
1200
1201 for (count = 0; count < cmap->len; count++) {
1202 if (transp)
1203 trans = *transp++;
1204 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
1205 count == cmap->len - 1);
1206 if (r != 0)
1207 return r;
1208 }
1209
1210 return 0;
1211 }
1212
omapfb_blank(int blank,struct fb_info * fbi)1213 static int omapfb_blank(int blank, struct fb_info *fbi)
1214 {
1215 struct omapfb_info *ofbi = FB2OFB(fbi);
1216 struct omapfb2_device *fbdev = ofbi->fbdev;
1217 struct omap_dss_device *display = fb2display(fbi);
1218 struct omapfb_display_data *d;
1219 int r = 0;
1220
1221 if (!display)
1222 return -EINVAL;
1223
1224 omapfb_lock(fbdev);
1225
1226 d = get_display_data(fbdev, display);
1227
1228 switch (blank) {
1229 case FB_BLANK_UNBLANK:
1230 if (display->state == OMAP_DSS_DISPLAY_ACTIVE)
1231 goto exit;
1232
1233 r = display->driver->enable(display);
1234
1235 if ((display->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) &&
1236 d->update_mode == OMAPFB_AUTO_UPDATE &&
1237 !d->auto_update_work_enabled)
1238 omapfb_start_auto_update(fbdev, display);
1239
1240 break;
1241
1242 case FB_BLANK_NORMAL:
1243 /* FB_BLANK_NORMAL could be implemented.
1244 * Needs DSS additions. */
1245 case FB_BLANK_VSYNC_SUSPEND:
1246 case FB_BLANK_HSYNC_SUSPEND:
1247 case FB_BLANK_POWERDOWN:
1248 if (display->state != OMAP_DSS_DISPLAY_ACTIVE)
1249 goto exit;
1250
1251 if (d->auto_update_work_enabled)
1252 omapfb_stop_auto_update(fbdev, display);
1253
1254 display->driver->disable(display);
1255
1256 break;
1257
1258 default:
1259 r = -EINVAL;
1260 }
1261
1262 exit:
1263 omapfb_unlock(fbdev);
1264
1265 return r;
1266 }
1267
1268 #if 0
1269 /* XXX fb_read and fb_write are needed for VRFB */
1270 ssize_t omapfb_write(struct fb_info *info, const char __user *buf,
1271 size_t count, loff_t *ppos)
1272 {
1273 DBG("omapfb_write %d, %lu\n", count, (unsigned long)*ppos);
1274 /* XXX needed for VRFB */
1275 return count;
1276 }
1277 #endif
1278
1279 static const struct fb_ops omapfb_ops = {
1280 .owner = THIS_MODULE,
1281 .fb_open = omapfb_open,
1282 .fb_release = omapfb_release,
1283 .fb_fillrect = cfb_fillrect,
1284 .fb_copyarea = cfb_copyarea,
1285 .fb_imageblit = cfb_imageblit,
1286 .fb_blank = omapfb_blank,
1287 .fb_ioctl = omapfb_ioctl,
1288 .fb_check_var = omapfb_check_var,
1289 .fb_set_par = omapfb_set_par,
1290 .fb_pan_display = omapfb_pan_display,
1291 .fb_mmap = omapfb_mmap,
1292 .fb_setcolreg = omapfb_setcolreg,
1293 .fb_setcmap = omapfb_setcmap,
1294 /*.fb_write = omapfb_write,*/
1295 };
1296
omapfb_free_fbmem(struct fb_info * fbi)1297 static void omapfb_free_fbmem(struct fb_info *fbi)
1298 {
1299 struct omapfb_info *ofbi = FB2OFB(fbi);
1300 struct omapfb2_device *fbdev = ofbi->fbdev;
1301 struct omapfb2_mem_region *rg;
1302
1303 rg = ofbi->region;
1304
1305 if (rg->token == NULL)
1306 return;
1307
1308 WARN_ON(atomic_read(&rg->map_count));
1309
1310 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1311 /* unmap the 0 angle rotation */
1312 if (rg->vrfb.vaddr[0]) {
1313 iounmap(rg->vrfb.vaddr[0]);
1314 rg->vrfb.vaddr[0] = NULL;
1315 }
1316
1317 omap_vrfb_release_ctx(&rg->vrfb);
1318 }
1319
1320 dma_free_attrs(fbdev->dev, rg->size, rg->token, rg->dma_handle,
1321 rg->attrs);
1322
1323 rg->token = NULL;
1324 rg->vaddr = NULL;
1325 rg->paddr = 0;
1326 rg->alloc = 0;
1327 rg->size = 0;
1328 }
1329
clear_fb_info(struct fb_info * fbi)1330 static void clear_fb_info(struct fb_info *fbi)
1331 {
1332 memset(&fbi->var, 0, sizeof(fbi->var));
1333 memset(&fbi->fix, 0, sizeof(fbi->fix));
1334 strlcpy(fbi->fix.id, MODULE_NAME, sizeof(fbi->fix.id));
1335 }
1336
omapfb_free_all_fbmem(struct omapfb2_device * fbdev)1337 static int omapfb_free_all_fbmem(struct omapfb2_device *fbdev)
1338 {
1339 int i;
1340
1341 DBG("free all fbmem\n");
1342
1343 for (i = 0; i < fbdev->num_fbs; i++) {
1344 struct fb_info *fbi = fbdev->fbs[i];
1345 omapfb_free_fbmem(fbi);
1346 clear_fb_info(fbi);
1347 }
1348
1349 return 0;
1350 }
1351
omapfb_alloc_fbmem(struct fb_info * fbi,unsigned long size,unsigned long paddr)1352 static int omapfb_alloc_fbmem(struct fb_info *fbi, unsigned long size,
1353 unsigned long paddr)
1354 {
1355 struct omapfb_info *ofbi = FB2OFB(fbi);
1356 struct omapfb2_device *fbdev = ofbi->fbdev;
1357 struct omapfb2_mem_region *rg;
1358 void *token;
1359 unsigned long attrs;
1360 dma_addr_t dma_handle;
1361 int r;
1362
1363 rg = ofbi->region;
1364
1365 rg->paddr = 0;
1366 rg->vaddr = NULL;
1367 memset(&rg->vrfb, 0, sizeof rg->vrfb);
1368 rg->size = 0;
1369 rg->type = 0;
1370 rg->alloc = false;
1371 rg->map = false;
1372
1373 size = PAGE_ALIGN(size);
1374
1375 attrs = DMA_ATTR_WRITE_COMBINE;
1376
1377 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB)
1378 attrs |= DMA_ATTR_NO_KERNEL_MAPPING;
1379
1380 DBG("allocating %lu bytes for fb %d\n", size, ofbi->id);
1381
1382 token = dma_alloc_attrs(fbdev->dev, size, &dma_handle,
1383 GFP_KERNEL, attrs);
1384
1385 if (token == NULL) {
1386 dev_err(fbdev->dev, "failed to allocate framebuffer\n");
1387 return -ENOMEM;
1388 }
1389
1390 DBG("allocated VRAM paddr %lx, vaddr %p\n",
1391 (unsigned long)dma_handle, token);
1392
1393 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1394 r = omap_vrfb_request_ctx(&rg->vrfb);
1395 if (r) {
1396 dma_free_attrs(fbdev->dev, size, token, dma_handle,
1397 attrs);
1398 dev_err(fbdev->dev, "vrfb create ctx failed\n");
1399 return r;
1400 }
1401 }
1402
1403 rg->attrs = attrs;
1404 rg->token = token;
1405 rg->dma_handle = dma_handle;
1406
1407 rg->paddr = (unsigned long)dma_handle;
1408 rg->vaddr = (void __iomem *)token;
1409 rg->size = size;
1410 rg->alloc = 1;
1411
1412 return 0;
1413 }
1414
1415 /* allocate fbmem using display resolution as reference */
omapfb_alloc_fbmem_display(struct fb_info * fbi,unsigned long size,unsigned long paddr)1416 static int omapfb_alloc_fbmem_display(struct fb_info *fbi, unsigned long size,
1417 unsigned long paddr)
1418 {
1419 struct omapfb_info *ofbi = FB2OFB(fbi);
1420 struct omapfb2_device *fbdev = ofbi->fbdev;
1421 struct omap_dss_device *display;
1422 int bytespp;
1423
1424 display = fb2display(fbi);
1425
1426 if (!display)
1427 return 0;
1428
1429 switch (omapfb_get_recommended_bpp(fbdev, display)) {
1430 case 16:
1431 bytespp = 2;
1432 break;
1433 case 24:
1434 bytespp = 4;
1435 break;
1436 default:
1437 bytespp = 4;
1438 break;
1439 }
1440
1441 if (!size) {
1442 u16 w, h;
1443
1444 display->driver->get_resolution(display, &w, &h);
1445
1446 if (ofbi->rotation_type == OMAP_DSS_ROT_VRFB) {
1447 size = max(omap_vrfb_min_phys_size(w, h, bytespp),
1448 omap_vrfb_min_phys_size(h, w, bytespp));
1449
1450 DBG("adjusting fb mem size for VRFB, %u -> %lu\n",
1451 w * h * bytespp, size);
1452 } else {
1453 size = w * h * bytespp;
1454 }
1455 }
1456
1457 if (!size)
1458 return 0;
1459
1460 return omapfb_alloc_fbmem(fbi, size, paddr);
1461 }
1462
omapfb_parse_vram_param(const char * param,int max_entries,unsigned long * sizes,unsigned long * paddrs)1463 static int omapfb_parse_vram_param(const char *param, int max_entries,
1464 unsigned long *sizes, unsigned long *paddrs)
1465 {
1466 unsigned int fbnum;
1467 unsigned long size;
1468 unsigned long paddr = 0;
1469 char *p, *start;
1470
1471 start = (char *)param;
1472
1473 while (1) {
1474 p = start;
1475
1476 fbnum = simple_strtoul(p, &p, 10);
1477
1478 if (p == start)
1479 return -EINVAL;
1480
1481 if (*p != ':')
1482 return -EINVAL;
1483
1484 if (fbnum >= max_entries)
1485 return -EINVAL;
1486
1487 size = memparse(p + 1, &p);
1488
1489 if (!size)
1490 return -EINVAL;
1491
1492 paddr = 0;
1493
1494 if (*p == '@') {
1495 paddr = simple_strtoul(p + 1, &p, 16);
1496
1497 if (!paddr)
1498 return -EINVAL;
1499
1500 }
1501
1502 WARN_ONCE(paddr,
1503 "reserving memory at predefined address not supported\n");
1504
1505 paddrs[fbnum] = paddr;
1506 sizes[fbnum] = size;
1507
1508 if (*p == 0)
1509 break;
1510
1511 if (*p != ',')
1512 return -EINVAL;
1513
1514 ++p;
1515
1516 start = p;
1517 }
1518
1519 return 0;
1520 }
1521
omapfb_allocate_all_fbs(struct omapfb2_device * fbdev)1522 static int omapfb_allocate_all_fbs(struct omapfb2_device *fbdev)
1523 {
1524 int i, r;
1525 unsigned long vram_sizes[10];
1526 unsigned long vram_paddrs[10];
1527
1528 memset(&vram_sizes, 0, sizeof(vram_sizes));
1529 memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1530
1531 if (def_vram && omapfb_parse_vram_param(def_vram, 10,
1532 vram_sizes, vram_paddrs)) {
1533 dev_err(fbdev->dev, "failed to parse vram parameter\n");
1534
1535 memset(&vram_sizes, 0, sizeof(vram_sizes));
1536 memset(&vram_paddrs, 0, sizeof(vram_paddrs));
1537 }
1538
1539 for (i = 0; i < fbdev->num_fbs; i++) {
1540 /* allocate memory automatically only for fb0, or if
1541 * excplicitly defined with vram or plat data option */
1542 if (i == 0 || vram_sizes[i] != 0) {
1543 r = omapfb_alloc_fbmem_display(fbdev->fbs[i],
1544 vram_sizes[i], vram_paddrs[i]);
1545
1546 if (r)
1547 return r;
1548 }
1549 }
1550
1551 for (i = 0; i < fbdev->num_fbs; i++) {
1552 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1553 struct omapfb2_mem_region *rg;
1554 rg = ofbi->region;
1555
1556 DBG("region%d phys %08x virt %p size=%lu\n",
1557 i,
1558 rg->paddr,
1559 rg->vaddr,
1560 rg->size);
1561 }
1562
1563 return 0;
1564 }
1565
omapfb_clear_fb(struct fb_info * fbi)1566 static void omapfb_clear_fb(struct fb_info *fbi)
1567 {
1568 const struct fb_fillrect rect = {
1569 .dx = 0,
1570 .dy = 0,
1571 .width = fbi->var.xres_virtual,
1572 .height = fbi->var.yres_virtual,
1573 .color = 0,
1574 .rop = ROP_COPY,
1575 };
1576
1577 cfb_fillrect(fbi, &rect);
1578 }
1579
omapfb_realloc_fbmem(struct fb_info * fbi,unsigned long size,int type)1580 int omapfb_realloc_fbmem(struct fb_info *fbi, unsigned long size, int type)
1581 {
1582 struct omapfb_info *ofbi = FB2OFB(fbi);
1583 struct omapfb2_device *fbdev = ofbi->fbdev;
1584 struct omapfb2_mem_region *rg = ofbi->region;
1585 unsigned long old_size = rg->size;
1586 unsigned long old_paddr = rg->paddr;
1587 int old_type = rg->type;
1588 int r;
1589
1590 if (type != OMAPFB_MEMTYPE_SDRAM)
1591 return -EINVAL;
1592
1593 size = PAGE_ALIGN(size);
1594
1595 if (old_size == size && old_type == type)
1596 return 0;
1597
1598 omapfb_free_fbmem(fbi);
1599
1600 if (size == 0) {
1601 clear_fb_info(fbi);
1602 return 0;
1603 }
1604
1605 r = omapfb_alloc_fbmem(fbi, size, 0);
1606
1607 if (r) {
1608 if (old_size)
1609 omapfb_alloc_fbmem(fbi, old_size, old_paddr);
1610
1611 if (rg->size == 0)
1612 clear_fb_info(fbi);
1613
1614 return r;
1615 }
1616
1617 if (old_size == size)
1618 return 0;
1619
1620 if (old_size == 0) {
1621 DBG("initializing fb %d\n", ofbi->id);
1622 r = omapfb_fb_init(fbdev, fbi);
1623 if (r) {
1624 DBG("omapfb_fb_init failed\n");
1625 goto err;
1626 }
1627 r = omapfb_apply_changes(fbi, 1);
1628 if (r) {
1629 DBG("omapfb_apply_changes failed\n");
1630 goto err;
1631 }
1632 } else {
1633 struct fb_var_screeninfo new_var;
1634 memcpy(&new_var, &fbi->var, sizeof(new_var));
1635 r = check_fb_var(fbi, &new_var);
1636 if (r)
1637 goto err;
1638 memcpy(&fbi->var, &new_var, sizeof(fbi->var));
1639 set_fb_fix(fbi);
1640 r = setup_vrfb_rotation(fbi);
1641 if (r)
1642 goto err;
1643 }
1644
1645 omapfb_clear_fb(fbi);
1646
1647 return 0;
1648 err:
1649 omapfb_free_fbmem(fbi);
1650 clear_fb_info(fbi);
1651 return r;
1652 }
1653
omapfb_auto_update_work(struct work_struct * work)1654 static void omapfb_auto_update_work(struct work_struct *work)
1655 {
1656 struct omap_dss_device *dssdev;
1657 struct omap_dss_driver *dssdrv;
1658 struct omapfb_display_data *d;
1659 u16 w, h;
1660 unsigned int freq;
1661 struct omapfb2_device *fbdev;
1662
1663 d = container_of(work, struct omapfb_display_data,
1664 auto_update_work.work);
1665
1666 dssdev = d->dssdev;
1667 dssdrv = dssdev->driver;
1668 fbdev = d->fbdev;
1669
1670 if (!dssdrv || !dssdrv->update)
1671 return;
1672
1673 if (dssdrv->sync)
1674 dssdrv->sync(dssdev);
1675
1676 dssdrv->get_resolution(dssdev, &w, &h);
1677 dssdrv->update(dssdev, 0, 0, w, h);
1678
1679 freq = auto_update_freq;
1680 if (freq == 0)
1681 freq = 20;
1682 queue_delayed_work(fbdev->auto_update_wq,
1683 &d->auto_update_work, HZ / freq);
1684 }
1685
omapfb_start_auto_update(struct omapfb2_device * fbdev,struct omap_dss_device * display)1686 void omapfb_start_auto_update(struct omapfb2_device *fbdev,
1687 struct omap_dss_device *display)
1688 {
1689 struct omapfb_display_data *d;
1690
1691 if (fbdev->auto_update_wq == NULL) {
1692 struct workqueue_struct *wq;
1693
1694 wq = create_singlethread_workqueue("omapfb_auto_update");
1695
1696 if (wq == NULL) {
1697 dev_err(fbdev->dev, "Failed to create workqueue for "
1698 "auto-update\n");
1699 return;
1700 }
1701
1702 fbdev->auto_update_wq = wq;
1703 }
1704
1705 d = get_display_data(fbdev, display);
1706
1707 INIT_DELAYED_WORK(&d->auto_update_work, omapfb_auto_update_work);
1708
1709 d->auto_update_work_enabled = true;
1710
1711 omapfb_auto_update_work(&d->auto_update_work.work);
1712 }
1713
omapfb_stop_auto_update(struct omapfb2_device * fbdev,struct omap_dss_device * display)1714 void omapfb_stop_auto_update(struct omapfb2_device *fbdev,
1715 struct omap_dss_device *display)
1716 {
1717 struct omapfb_display_data *d;
1718
1719 d = get_display_data(fbdev, display);
1720
1721 cancel_delayed_work_sync(&d->auto_update_work);
1722
1723 d->auto_update_work_enabled = false;
1724 }
1725
1726 /* initialize fb_info, var, fix to something sane based on the display */
omapfb_fb_init(struct omapfb2_device * fbdev,struct fb_info * fbi)1727 static int omapfb_fb_init(struct omapfb2_device *fbdev, struct fb_info *fbi)
1728 {
1729 struct fb_var_screeninfo *var = &fbi->var;
1730 struct omap_dss_device *display = fb2display(fbi);
1731 struct omapfb_info *ofbi = FB2OFB(fbi);
1732 int r = 0;
1733
1734 fbi->fbops = &omapfb_ops;
1735 fbi->flags = FBINFO_FLAG_DEFAULT;
1736 fbi->pseudo_palette = fbdev->pseudo_palette;
1737
1738 if (ofbi->region->size == 0) {
1739 clear_fb_info(fbi);
1740 return 0;
1741 }
1742
1743 var->nonstd = 0;
1744 var->bits_per_pixel = 0;
1745
1746 var->rotate = def_rotate;
1747
1748 if (display) {
1749 u16 w, h;
1750 int rotation = (var->rotate + ofbi->rotation[0]) % 4;
1751
1752 display->driver->get_resolution(display, &w, &h);
1753
1754 if (rotation == FB_ROTATE_CW ||
1755 rotation == FB_ROTATE_CCW) {
1756 var->xres = h;
1757 var->yres = w;
1758 } else {
1759 var->xres = w;
1760 var->yres = h;
1761 }
1762
1763 var->xres_virtual = var->xres;
1764 var->yres_virtual = var->yres;
1765
1766 if (!var->bits_per_pixel) {
1767 switch (omapfb_get_recommended_bpp(fbdev, display)) {
1768 case 16:
1769 var->bits_per_pixel = 16;
1770 break;
1771 case 24:
1772 var->bits_per_pixel = 32;
1773 break;
1774 default:
1775 dev_err(fbdev->dev, "illegal display "
1776 "bpp\n");
1777 return -EINVAL;
1778 }
1779 }
1780 } else {
1781 /* if there's no display, let's just guess some basic values */
1782 var->xres = 320;
1783 var->yres = 240;
1784 var->xres_virtual = var->xres;
1785 var->yres_virtual = var->yres;
1786 if (!var->bits_per_pixel)
1787 var->bits_per_pixel = 16;
1788 }
1789
1790 r = check_fb_var(fbi, var);
1791 if (r)
1792 goto err;
1793
1794 set_fb_fix(fbi);
1795 r = setup_vrfb_rotation(fbi);
1796 if (r)
1797 goto err;
1798
1799 r = fb_alloc_cmap(&fbi->cmap, 256, 0);
1800 if (r)
1801 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1802
1803 err:
1804 return r;
1805 }
1806
fbinfo_cleanup(struct omapfb2_device * fbdev,struct fb_info * fbi)1807 static void fbinfo_cleanup(struct omapfb2_device *fbdev, struct fb_info *fbi)
1808 {
1809 fb_dealloc_cmap(&fbi->cmap);
1810 }
1811
1812
omapfb_free_resources(struct omapfb2_device * fbdev)1813 static void omapfb_free_resources(struct omapfb2_device *fbdev)
1814 {
1815 int i;
1816
1817 DBG("free_resources\n");
1818
1819 if (fbdev == NULL)
1820 return;
1821
1822 for (i = 0; i < fbdev->num_overlays; i++) {
1823 struct omap_overlay *ovl = fbdev->overlays[i];
1824
1825 ovl->disable(ovl);
1826
1827 if (ovl->manager)
1828 ovl->unset_manager(ovl);
1829 }
1830
1831 for (i = 0; i < fbdev->num_fbs; i++)
1832 unregister_framebuffer(fbdev->fbs[i]);
1833
1834 /* free the reserved fbmem */
1835 omapfb_free_all_fbmem(fbdev);
1836
1837 for (i = 0; i < fbdev->num_fbs; i++) {
1838 fbinfo_cleanup(fbdev, fbdev->fbs[i]);
1839 framebuffer_release(fbdev->fbs[i]);
1840 }
1841
1842 for (i = 0; i < fbdev->num_displays; i++) {
1843 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
1844
1845 if (fbdev->displays[i].auto_update_work_enabled)
1846 omapfb_stop_auto_update(fbdev, dssdev);
1847
1848 if (dssdev->state != OMAP_DSS_DISPLAY_DISABLED)
1849 dssdev->driver->disable(dssdev);
1850
1851 dssdev->driver->disconnect(dssdev);
1852
1853 omap_dss_put_device(dssdev);
1854 }
1855
1856 if (fbdev->auto_update_wq != NULL) {
1857 flush_workqueue(fbdev->auto_update_wq);
1858 destroy_workqueue(fbdev->auto_update_wq);
1859 fbdev->auto_update_wq = NULL;
1860 }
1861
1862 dev_set_drvdata(fbdev->dev, NULL);
1863 }
1864
omapfb_create_framebuffers(struct omapfb2_device * fbdev)1865 static int omapfb_create_framebuffers(struct omapfb2_device *fbdev)
1866 {
1867 int r, i;
1868
1869 fbdev->num_fbs = 0;
1870
1871 DBG("create %d framebuffers\n", CONFIG_FB_OMAP2_NUM_FBS);
1872
1873 /* allocate fb_infos */
1874 for (i = 0; i < CONFIG_FB_OMAP2_NUM_FBS; i++) {
1875 struct fb_info *fbi;
1876 struct omapfb_info *ofbi;
1877
1878 fbi = framebuffer_alloc(sizeof(struct omapfb_info),
1879 fbdev->dev);
1880 if (!fbi)
1881 return -ENOMEM;
1882
1883 clear_fb_info(fbi);
1884
1885 fbdev->fbs[i] = fbi;
1886
1887 ofbi = FB2OFB(fbi);
1888 ofbi->fbdev = fbdev;
1889 ofbi->id = i;
1890
1891 ofbi->region = &fbdev->regions[i];
1892 ofbi->region->id = i;
1893 init_rwsem(&ofbi->region->lock);
1894
1895 /* assign these early, so that fb alloc can use them */
1896 ofbi->rotation_type = def_vrfb ? OMAP_DSS_ROT_VRFB :
1897 OMAP_DSS_ROT_DMA;
1898 ofbi->mirror = def_mirror;
1899
1900 fbdev->num_fbs++;
1901 }
1902
1903 DBG("fb_infos allocated\n");
1904
1905 /* assign overlays for the fbs */
1906 for (i = 0; i < min(fbdev->num_fbs, fbdev->num_overlays); i++) {
1907 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[i]);
1908
1909 ofbi->overlays[0] = fbdev->overlays[i];
1910 ofbi->num_overlays = 1;
1911 }
1912
1913 /* allocate fb memories */
1914 r = omapfb_allocate_all_fbs(fbdev);
1915 if (r) {
1916 dev_err(fbdev->dev, "failed to allocate fbmem\n");
1917 return r;
1918 }
1919
1920 DBG("fbmems allocated\n");
1921
1922 /* setup fb_infos */
1923 for (i = 0; i < fbdev->num_fbs; i++) {
1924 struct fb_info *fbi = fbdev->fbs[i];
1925 struct omapfb_info *ofbi = FB2OFB(fbi);
1926
1927 omapfb_get_mem_region(ofbi->region);
1928 r = omapfb_fb_init(fbdev, fbi);
1929 omapfb_put_mem_region(ofbi->region);
1930
1931 if (r) {
1932 dev_err(fbdev->dev, "failed to setup fb_info\n");
1933 return r;
1934 }
1935 }
1936
1937 for (i = 0; i < fbdev->num_fbs; i++) {
1938 struct fb_info *fbi = fbdev->fbs[i];
1939 struct omapfb_info *ofbi = FB2OFB(fbi);
1940
1941 if (ofbi->region->size == 0)
1942 continue;
1943
1944 omapfb_clear_fb(fbi);
1945 }
1946
1947 DBG("fb_infos initialized\n");
1948
1949 for (i = 0; i < fbdev->num_fbs; i++) {
1950 r = register_framebuffer(fbdev->fbs[i]);
1951 if (r != 0) {
1952 dev_err(fbdev->dev,
1953 "registering framebuffer %d failed\n", i);
1954 return r;
1955 }
1956 }
1957
1958 DBG("framebuffers registered\n");
1959
1960 for (i = 0; i < fbdev->num_fbs; i++) {
1961 struct fb_info *fbi = fbdev->fbs[i];
1962 struct omapfb_info *ofbi = FB2OFB(fbi);
1963
1964 omapfb_get_mem_region(ofbi->region);
1965 r = omapfb_apply_changes(fbi, 1);
1966 omapfb_put_mem_region(ofbi->region);
1967
1968 if (r) {
1969 dev_err(fbdev->dev, "failed to change mode\n");
1970 return r;
1971 }
1972 }
1973
1974 /* Enable fb0 */
1975 if (fbdev->num_fbs > 0) {
1976 struct omapfb_info *ofbi = FB2OFB(fbdev->fbs[0]);
1977
1978 if (ofbi->num_overlays > 0) {
1979 struct omap_overlay *ovl = ofbi->overlays[0];
1980
1981 ovl->manager->apply(ovl->manager);
1982
1983 r = omapfb_overlay_enable(ovl, 1);
1984
1985 if (r) {
1986 dev_err(fbdev->dev,
1987 "failed to enable overlay\n");
1988 return r;
1989 }
1990 }
1991 }
1992
1993 DBG("create_framebuffers done\n");
1994
1995 return 0;
1996 }
1997
omapfb_mode_to_timings(const char * mode_str,struct omap_dss_device * display,struct omap_video_timings * timings,u8 * bpp)1998 static int omapfb_mode_to_timings(const char *mode_str,
1999 struct omap_dss_device *display,
2000 struct omap_video_timings *timings, u8 *bpp)
2001 {
2002 struct fb_info *fbi;
2003 struct fb_var_screeninfo *var;
2004 struct fb_ops *fbops;
2005 int r;
2006
2007 #ifdef CONFIG_OMAP2_DSS_VENC
2008 if (strcmp(mode_str, "pal") == 0) {
2009 *timings = omap_dss_pal_timings;
2010 *bpp = 24;
2011 return 0;
2012 } else if (strcmp(mode_str, "ntsc") == 0) {
2013 *timings = omap_dss_ntsc_timings;
2014 *bpp = 24;
2015 return 0;
2016 }
2017 #endif
2018
2019 /* this is quite a hack, but I wanted to use the modedb and for
2020 * that we need fb_info and var, so we create dummy ones */
2021
2022 *bpp = 0;
2023 fbi = NULL;
2024 var = NULL;
2025 fbops = NULL;
2026
2027 fbi = kzalloc(sizeof(*fbi), GFP_KERNEL);
2028 if (fbi == NULL) {
2029 r = -ENOMEM;
2030 goto err;
2031 }
2032
2033 var = kzalloc(sizeof(*var), GFP_KERNEL);
2034 if (var == NULL) {
2035 r = -ENOMEM;
2036 goto err;
2037 }
2038
2039 fbops = kzalloc(sizeof(*fbops), GFP_KERNEL);
2040 if (fbops == NULL) {
2041 r = -ENOMEM;
2042 goto err;
2043 }
2044
2045 fbi->fbops = fbops;
2046
2047 r = fb_find_mode(var, fbi, mode_str, NULL, 0, NULL, 24);
2048 if (r == 0) {
2049 r = -EINVAL;
2050 goto err;
2051 }
2052
2053 if (display->driver->get_timings) {
2054 display->driver->get_timings(display, timings);
2055 } else {
2056 timings->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
2057 timings->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
2058 timings->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
2059 }
2060
2061 timings->pixelclock = PICOS2KHZ(var->pixclock) * 1000;
2062 timings->hbp = var->left_margin;
2063 timings->hfp = var->right_margin;
2064 timings->vbp = var->upper_margin;
2065 timings->vfp = var->lower_margin;
2066 timings->hsw = var->hsync_len;
2067 timings->vsw = var->vsync_len;
2068 timings->x_res = var->xres;
2069 timings->y_res = var->yres;
2070 timings->hsync_level = var->sync & FB_SYNC_HOR_HIGH_ACT ?
2071 OMAPDSS_SIG_ACTIVE_HIGH :
2072 OMAPDSS_SIG_ACTIVE_LOW;
2073 timings->vsync_level = var->sync & FB_SYNC_VERT_HIGH_ACT ?
2074 OMAPDSS_SIG_ACTIVE_HIGH :
2075 OMAPDSS_SIG_ACTIVE_LOW;
2076 timings->interlace = var->vmode & FB_VMODE_INTERLACED;
2077
2078 switch (var->bits_per_pixel) {
2079 case 16:
2080 *bpp = 16;
2081 break;
2082 case 24:
2083 case 32:
2084 default:
2085 *bpp = 24;
2086 break;
2087 }
2088
2089 r = 0;
2090
2091 err:
2092 kfree(fbi);
2093 kfree(var);
2094 kfree(fbops);
2095
2096 return r;
2097 }
2098
omapfb_set_def_mode(struct omapfb2_device * fbdev,struct omap_dss_device * display,char * mode_str)2099 static int omapfb_set_def_mode(struct omapfb2_device *fbdev,
2100 struct omap_dss_device *display, char *mode_str)
2101 {
2102 int r;
2103 u8 bpp;
2104 struct omap_video_timings timings, temp_timings;
2105 struct omapfb_display_data *d;
2106
2107 r = omapfb_mode_to_timings(mode_str, display, &timings, &bpp);
2108 if (r)
2109 return r;
2110
2111 d = get_display_data(fbdev, display);
2112 d->bpp_override = bpp;
2113
2114 if (display->driver->check_timings) {
2115 r = display->driver->check_timings(display, &timings);
2116 if (r)
2117 return r;
2118 } else {
2119 /* If check_timings is not present compare xres and yres */
2120 if (display->driver->get_timings) {
2121 display->driver->get_timings(display, &temp_timings);
2122
2123 if (temp_timings.x_res != timings.x_res ||
2124 temp_timings.y_res != timings.y_res)
2125 return -EINVAL;
2126 }
2127 }
2128
2129 if (display->driver->set_timings)
2130 display->driver->set_timings(display, &timings);
2131
2132 return 0;
2133 }
2134
omapfb_get_recommended_bpp(struct omapfb2_device * fbdev,struct omap_dss_device * dssdev)2135 static int omapfb_get_recommended_bpp(struct omapfb2_device *fbdev,
2136 struct omap_dss_device *dssdev)
2137 {
2138 struct omapfb_display_data *d;
2139
2140 BUG_ON(dssdev->driver->get_recommended_bpp == NULL);
2141
2142 d = get_display_data(fbdev, dssdev);
2143
2144 if (d->bpp_override != 0)
2145 return d->bpp_override;
2146
2147 return dssdev->driver->get_recommended_bpp(dssdev);
2148 }
2149
omapfb_parse_def_modes(struct omapfb2_device * fbdev)2150 static int omapfb_parse_def_modes(struct omapfb2_device *fbdev)
2151 {
2152 char *str, *options, *this_opt;
2153 int r = 0;
2154
2155 str = kstrdup(def_mode, GFP_KERNEL);
2156 if (!str)
2157 return -ENOMEM;
2158 options = str;
2159
2160 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
2161 char *p, *display_str, *mode_str;
2162 struct omap_dss_device *display;
2163 int i;
2164
2165 p = strchr(this_opt, ':');
2166 if (!p) {
2167 r = -EINVAL;
2168 break;
2169 }
2170
2171 *p = 0;
2172 display_str = this_opt;
2173 mode_str = p + 1;
2174
2175 display = NULL;
2176 for (i = 0; i < fbdev->num_displays; ++i) {
2177 if (strcmp(fbdev->displays[i].dssdev->name,
2178 display_str) == 0) {
2179 display = fbdev->displays[i].dssdev;
2180 break;
2181 }
2182 }
2183
2184 if (!display) {
2185 r = -EINVAL;
2186 break;
2187 }
2188
2189 r = omapfb_set_def_mode(fbdev, display, mode_str);
2190 if (r)
2191 break;
2192 }
2193
2194 kfree(str);
2195
2196 return r;
2197 }
2198
fb_videomode_to_omap_timings(struct fb_videomode * m,struct omap_dss_device * display,struct omap_video_timings * t)2199 static void fb_videomode_to_omap_timings(struct fb_videomode *m,
2200 struct omap_dss_device *display,
2201 struct omap_video_timings *t)
2202 {
2203 if (display->driver->get_timings) {
2204 display->driver->get_timings(display, t);
2205 } else {
2206 t->data_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE;
2207 t->de_level = OMAPDSS_SIG_ACTIVE_HIGH;
2208 t->sync_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE;
2209 }
2210
2211 t->x_res = m->xres;
2212 t->y_res = m->yres;
2213 t->pixelclock = PICOS2KHZ(m->pixclock) * 1000;
2214 t->hsw = m->hsync_len;
2215 t->hfp = m->right_margin;
2216 t->hbp = m->left_margin;
2217 t->vsw = m->vsync_len;
2218 t->vfp = m->lower_margin;
2219 t->vbp = m->upper_margin;
2220 t->hsync_level = m->sync & FB_SYNC_HOR_HIGH_ACT ?
2221 OMAPDSS_SIG_ACTIVE_HIGH :
2222 OMAPDSS_SIG_ACTIVE_LOW;
2223 t->vsync_level = m->sync & FB_SYNC_VERT_HIGH_ACT ?
2224 OMAPDSS_SIG_ACTIVE_HIGH :
2225 OMAPDSS_SIG_ACTIVE_LOW;
2226 t->interlace = m->vmode & FB_VMODE_INTERLACED;
2227 }
2228
omapfb_find_best_mode(struct omap_dss_device * display,struct omap_video_timings * timings)2229 static int omapfb_find_best_mode(struct omap_dss_device *display,
2230 struct omap_video_timings *timings)
2231 {
2232 struct fb_monspecs *specs;
2233 u8 *edid;
2234 int r, i, best_idx, len;
2235
2236 if (!display->driver->read_edid)
2237 return -ENODEV;
2238
2239 len = 0x80 * 2;
2240 edid = kmalloc(len, GFP_KERNEL);
2241 if (edid == NULL)
2242 return -ENOMEM;
2243
2244 r = display->driver->read_edid(display, edid, len);
2245 if (r < 0)
2246 goto err1;
2247
2248 specs = kzalloc(sizeof(*specs), GFP_KERNEL);
2249 if (specs == NULL) {
2250 r = -ENOMEM;
2251 goto err1;
2252 }
2253
2254 fb_edid_to_monspecs(edid, specs);
2255
2256 best_idx = -1;
2257
2258 for (i = 0; i < specs->modedb_len; ++i) {
2259 struct fb_videomode *m;
2260 struct omap_video_timings t;
2261
2262 m = &specs->modedb[i];
2263
2264 if (m->pixclock == 0)
2265 continue;
2266
2267 /* skip repeated pixel modes */
2268 if (m->xres == 2880 || m->xres == 1440)
2269 continue;
2270
2271 if (m->vmode & FB_VMODE_INTERLACED ||
2272 m->vmode & FB_VMODE_DOUBLE)
2273 continue;
2274
2275 fb_videomode_to_omap_timings(m, display, &t);
2276
2277 r = display->driver->check_timings(display, &t);
2278 if (r == 0) {
2279 best_idx = i;
2280 break;
2281 }
2282 }
2283
2284 if (best_idx == -1) {
2285 r = -ENOENT;
2286 goto err2;
2287 }
2288
2289 fb_videomode_to_omap_timings(&specs->modedb[best_idx], display,
2290 timings);
2291
2292 r = 0;
2293
2294 err2:
2295 fb_destroy_modedb(specs->modedb);
2296 kfree(specs);
2297 err1:
2298 kfree(edid);
2299
2300 return r;
2301 }
2302
omapfb_init_display(struct omapfb2_device * fbdev,struct omap_dss_device * dssdev)2303 static int omapfb_init_display(struct omapfb2_device *fbdev,
2304 struct omap_dss_device *dssdev)
2305 {
2306 struct omap_dss_driver *dssdrv = dssdev->driver;
2307 struct omapfb_display_data *d;
2308 int r;
2309
2310 r = dssdrv->enable(dssdev);
2311 if (r) {
2312 dev_warn(fbdev->dev, "Failed to enable display '%s'\n",
2313 dssdev->name);
2314 return r;
2315 }
2316
2317 d = get_display_data(fbdev, dssdev);
2318
2319 d->fbdev = fbdev;
2320
2321 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE) {
2322 u16 w, h;
2323
2324 if (auto_update) {
2325 omapfb_start_auto_update(fbdev, dssdev);
2326 d->update_mode = OMAPFB_AUTO_UPDATE;
2327 } else {
2328 d->update_mode = OMAPFB_MANUAL_UPDATE;
2329 }
2330
2331 if (dssdrv->enable_te) {
2332 r = dssdrv->enable_te(dssdev, 1);
2333 if (r) {
2334 dev_err(fbdev->dev, "Failed to set TE\n");
2335 return r;
2336 }
2337 }
2338
2339 dssdrv->get_resolution(dssdev, &w, &h);
2340 r = dssdrv->update(dssdev, 0, 0, w, h);
2341 if (r) {
2342 dev_err(fbdev->dev,
2343 "Failed to update display\n");
2344 return r;
2345 }
2346 } else {
2347 d->update_mode = OMAPFB_AUTO_UPDATE;
2348 }
2349
2350 return 0;
2351 }
2352
omapfb_init_connections(struct omapfb2_device * fbdev,struct omap_dss_device * def_dssdev)2353 static int omapfb_init_connections(struct omapfb2_device *fbdev,
2354 struct omap_dss_device *def_dssdev)
2355 {
2356 int i, r;
2357 struct omap_overlay_manager *mgr;
2358
2359 r = def_dssdev->driver->connect(def_dssdev);
2360 if (r) {
2361 dev_err(fbdev->dev, "failed to connect default display\n");
2362 return r;
2363 }
2364
2365 for (i = 0; i < fbdev->num_displays; ++i) {
2366 struct omap_dss_device *dssdev = fbdev->displays[i].dssdev;
2367
2368 if (dssdev == def_dssdev)
2369 continue;
2370
2371 /*
2372 * We don't care if the connect succeeds or not. We just want to
2373 * connect as many displays as possible.
2374 */
2375 dssdev->driver->connect(dssdev);
2376 }
2377
2378 mgr = omapdss_find_mgr_from_display(def_dssdev);
2379
2380 if (!mgr) {
2381 dev_err(fbdev->dev, "no ovl manager for the default display\n");
2382 return -EINVAL;
2383 }
2384
2385 for (i = 0; i < fbdev->num_overlays; i++) {
2386 struct omap_overlay *ovl = fbdev->overlays[i];
2387
2388 if (ovl->manager)
2389 ovl->unset_manager(ovl);
2390
2391 r = ovl->set_manager(ovl, mgr);
2392 if (r)
2393 dev_warn(fbdev->dev,
2394 "failed to connect overlay %s to manager %s\n",
2395 ovl->name, mgr->name);
2396 }
2397
2398 return 0;
2399 }
2400
2401 static struct omap_dss_device *
omapfb_find_default_display(struct omapfb2_device * fbdev)2402 omapfb_find_default_display(struct omapfb2_device *fbdev)
2403 {
2404 const char *def_name;
2405 int i;
2406
2407 /*
2408 * Search with the display name from the user or the board file,
2409 * comparing to display names and aliases
2410 */
2411
2412 def_name = omapdss_get_default_display_name();
2413
2414 if (def_name) {
2415 for (i = 0; i < fbdev->num_displays; ++i) {
2416 struct omap_dss_device *dssdev;
2417
2418 dssdev = fbdev->displays[i].dssdev;
2419
2420 if (dssdev->name && strcmp(def_name, dssdev->name) == 0)
2421 return dssdev;
2422
2423 if (strcmp(def_name, dssdev->alias) == 0)
2424 return dssdev;
2425 }
2426
2427 /* def_name given but not found */
2428 return NULL;
2429 }
2430
2431 /* then look for DT alias display0 */
2432 for (i = 0; i < fbdev->num_displays; ++i) {
2433 struct omap_dss_device *dssdev;
2434 int id;
2435
2436 dssdev = fbdev->displays[i].dssdev;
2437
2438 if (dssdev->dev->of_node == NULL)
2439 continue;
2440
2441 id = of_alias_get_id(dssdev->dev->of_node, "display");
2442 if (id == 0)
2443 return dssdev;
2444 }
2445
2446 /* return the first display we have in the list */
2447 return fbdev->displays[0].dssdev;
2448 }
2449
omapfb_probe(struct platform_device * pdev)2450 static int omapfb_probe(struct platform_device *pdev)
2451 {
2452 struct omapfb2_device *fbdev = NULL;
2453 int r = 0;
2454 int i;
2455 struct omap_dss_device *def_display;
2456 struct omap_dss_device *dssdev;
2457
2458 DBG("omapfb_probe\n");
2459
2460 if (omapdss_is_initialized() == false)
2461 return -EPROBE_DEFER;
2462
2463 if (pdev->num_resources != 0) {
2464 dev_err(&pdev->dev, "probed for an unknown device\n");
2465 r = -ENODEV;
2466 goto err0;
2467 }
2468
2469 fbdev = devm_kzalloc(&pdev->dev, sizeof(struct omapfb2_device),
2470 GFP_KERNEL);
2471 if (fbdev == NULL) {
2472 r = -ENOMEM;
2473 goto err0;
2474 }
2475
2476 if (def_vrfb && !omap_vrfb_supported()) {
2477 def_vrfb = 0;
2478 dev_warn(&pdev->dev, "VRFB is not supported on this hardware, "
2479 "ignoring the module parameter vrfb=y\n");
2480 }
2481
2482 r = omapdss_compat_init();
2483 if (r)
2484 goto err0;
2485
2486 mutex_init(&fbdev->mtx);
2487
2488 fbdev->dev = &pdev->dev;
2489 platform_set_drvdata(pdev, fbdev);
2490
2491 fbdev->num_displays = 0;
2492 dssdev = NULL;
2493 for_each_dss_dev(dssdev) {
2494 struct omapfb_display_data *d;
2495
2496 omap_dss_get_device(dssdev);
2497
2498 if (!dssdev->driver) {
2499 dev_warn(&pdev->dev, "no driver for display: %s\n",
2500 dssdev->name);
2501 omap_dss_put_device(dssdev);
2502 continue;
2503 }
2504
2505 d = &fbdev->displays[fbdev->num_displays++];
2506 d->dssdev = dssdev;
2507 if (dssdev->caps & OMAP_DSS_DISPLAY_CAP_MANUAL_UPDATE)
2508 d->update_mode = OMAPFB_MANUAL_UPDATE;
2509 else
2510 d->update_mode = OMAPFB_AUTO_UPDATE;
2511 }
2512
2513 if (fbdev->num_displays == 0) {
2514 dev_err(&pdev->dev, "no displays\n");
2515 r = -EPROBE_DEFER;
2516 goto cleanup;
2517 }
2518
2519 fbdev->num_overlays = omap_dss_get_num_overlays();
2520 for (i = 0; i < fbdev->num_overlays; i++)
2521 fbdev->overlays[i] = omap_dss_get_overlay(i);
2522
2523 fbdev->num_managers = omap_dss_get_num_overlay_managers();
2524 for (i = 0; i < fbdev->num_managers; i++)
2525 fbdev->managers[i] = omap_dss_get_overlay_manager(i);
2526
2527 def_display = omapfb_find_default_display(fbdev);
2528 if (def_display == NULL) {
2529 dev_err(fbdev->dev, "failed to find default display\n");
2530 r = -EPROBE_DEFER;
2531 goto cleanup;
2532 }
2533
2534 r = omapfb_init_connections(fbdev, def_display);
2535 if (r) {
2536 dev_err(fbdev->dev, "failed to init overlay connections\n");
2537 goto cleanup;
2538 }
2539
2540 if (def_mode && strlen(def_mode) > 0) {
2541 if (omapfb_parse_def_modes(fbdev))
2542 dev_warn(&pdev->dev, "cannot parse default modes\n");
2543 } else if (def_display && def_display->driver->set_timings &&
2544 def_display->driver->check_timings) {
2545 struct omap_video_timings t;
2546
2547 r = omapfb_find_best_mode(def_display, &t);
2548
2549 if (r == 0)
2550 def_display->driver->set_timings(def_display, &t);
2551 }
2552
2553 r = omapfb_create_framebuffers(fbdev);
2554 if (r)
2555 goto cleanup;
2556
2557 for (i = 0; i < fbdev->num_managers; i++) {
2558 struct omap_overlay_manager *mgr;
2559 mgr = fbdev->managers[i];
2560 r = mgr->apply(mgr);
2561 if (r)
2562 dev_warn(fbdev->dev, "failed to apply dispc config\n");
2563 }
2564
2565 DBG("mgr->apply'ed\n");
2566
2567 if (def_display) {
2568 r = omapfb_init_display(fbdev, def_display);
2569 if (r) {
2570 dev_err(fbdev->dev,
2571 "failed to initialize default "
2572 "display\n");
2573 goto cleanup;
2574 }
2575 }
2576
2577 DBG("create sysfs for fbs\n");
2578 r = omapfb_create_sysfs(fbdev);
2579 if (r) {
2580 dev_err(fbdev->dev, "failed to create sysfs entries\n");
2581 goto cleanup;
2582 }
2583
2584 if (def_display) {
2585 u16 w, h;
2586
2587 def_display->driver->get_resolution(def_display, &w, &h);
2588
2589 dev_info(fbdev->dev, "using display '%s' mode %dx%d\n",
2590 def_display->name, w, h);
2591 }
2592
2593 return 0;
2594
2595 cleanup:
2596 omapfb_free_resources(fbdev);
2597 omapdss_compat_uninit();
2598 err0:
2599 dev_err(&pdev->dev, "failed to setup omapfb\n");
2600 return r;
2601 }
2602
omapfb_remove(struct platform_device * pdev)2603 static int omapfb_remove(struct platform_device *pdev)
2604 {
2605 struct omapfb2_device *fbdev = platform_get_drvdata(pdev);
2606
2607 /* FIXME: wait till completion of pending events */
2608
2609 omapfb_remove_sysfs(fbdev);
2610
2611 omapfb_free_resources(fbdev);
2612
2613 omapdss_compat_uninit();
2614
2615 return 0;
2616 }
2617
2618 static struct platform_driver omapfb_driver = {
2619 .probe = omapfb_probe,
2620 .remove = omapfb_remove,
2621 .driver = {
2622 .name = "omapfb",
2623 },
2624 };
2625
2626 module_param_named(mode, def_mode, charp, 0);
2627 module_param_named(vram, def_vram, charp, 0);
2628 module_param_named(rotate, def_rotate, int, 0);
2629 module_param_named(vrfb, def_vrfb, bool, 0);
2630 module_param_named(mirror, def_mirror, bool, 0);
2631
2632 module_platform_driver(omapfb_driver);
2633
2634 MODULE_ALIAS("platform:omapfb");
2635 MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@nokia.com>");
2636 MODULE_DESCRIPTION("OMAP2/3 Framebuffer");
2637 MODULE_LICENSE("GPL v2");
2638