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Merge tag 'probes-fixes-v6.16-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git...
[linux-block.git] / drivers / video / fbdev / omap / omapfb_main.c
... / ...
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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * Framebuffer driver for TI OMAP boards
4 *
5 * Copyright (C) 2004 Nokia Corporation
6 * Author: Imre Deak <imre.deak@nokia.com>
7 *
8 * Acknowledgements:
9 * Alex McMains <aam@ridgerun.com> - Original driver
10 * Juha Yrjola <juha.yrjola@nokia.com> - Original driver and improvements
11 * Dirk Behme <dirk.behme@de.bosch.com> - changes for 2.6 kernel API
12 * Texas Instruments - H3 support
13 */
14#include <linux/platform_device.h>
15#include <linux/mm.h>
16#include <linux/slab.h>
17#include <linux/uaccess.h>
18#include <linux/module.h>
19#include <linux/sysfs.h>
20
21#include <linux/omap-dma.h>
22
23#include <linux/soc/ti/omap1-soc.h>
24#include "omapfb.h"
25#include "lcdc.h"
26
27#define MODULE_NAME "omapfb"
28
29static unsigned int def_accel;
30static unsigned long def_vram[OMAPFB_PLANE_NUM];
31static unsigned int def_vram_cnt;
32static unsigned long def_vxres;
33static unsigned long def_vyres;
34static unsigned int def_rotate;
35static unsigned int def_mirror;
36
37static bool manual_update = IS_BUILTIN(CONFIG_FB_OMAP_MANUAL_UPDATE);
38
39static struct platform_device *fbdev_pdev;
40static struct lcd_panel *fbdev_panel;
41static struct omapfb_device *omapfb_dev;
42
43struct caps_table_struct {
44 unsigned long flag;
45 const char *name;
46};
47
48static const struct caps_table_struct ctrl_caps[] = {
49 { OMAPFB_CAPS_MANUAL_UPDATE, "manual update" },
50 { OMAPFB_CAPS_TEARSYNC, "tearing synchronization" },
51 { OMAPFB_CAPS_PLANE_RELOCATE_MEM, "relocate plane memory" },
52 { OMAPFB_CAPS_PLANE_SCALE, "scale plane" },
53 { OMAPFB_CAPS_WINDOW_PIXEL_DOUBLE, "pixel double window" },
54 { OMAPFB_CAPS_WINDOW_SCALE, "scale window" },
55 { OMAPFB_CAPS_WINDOW_OVERLAY, "overlay window" },
56 { OMAPFB_CAPS_WINDOW_ROTATE, "rotate window" },
57 { OMAPFB_CAPS_SET_BACKLIGHT, "backlight setting" },
58};
59
60static const struct caps_table_struct color_caps[] = {
61 { 1 << OMAPFB_COLOR_RGB565, "RGB565", },
62 { 1 << OMAPFB_COLOR_YUV422, "YUV422", },
63 { 1 << OMAPFB_COLOR_YUV420, "YUV420", },
64 { 1 << OMAPFB_COLOR_CLUT_8BPP, "CLUT8", },
65 { 1 << OMAPFB_COLOR_CLUT_4BPP, "CLUT4", },
66 { 1 << OMAPFB_COLOR_CLUT_2BPP, "CLUT2", },
67 { 1 << OMAPFB_COLOR_CLUT_1BPP, "CLUT1", },
68 { 1 << OMAPFB_COLOR_RGB444, "RGB444", },
69 { 1 << OMAPFB_COLOR_YUY422, "YUY422", },
70};
71
72static void omapdss_release(struct device *dev)
73{
74}
75
76/* dummy device for clocks */
77static struct platform_device omapdss_device = {
78 .name = "omapdss_dss",
79 .id = -1,
80 .dev = {
81 .release = omapdss_release,
82 },
83};
84
85/*
86 * ---------------------------------------------------------------------------
87 * LCD panel
88 * ---------------------------------------------------------------------------
89 */
90extern struct lcd_ctrl hwa742_ctrl;
91
92static const struct lcd_ctrl *ctrls[] = {
93 &omap1_int_ctrl,
94
95#ifdef CONFIG_FB_OMAP_LCDC_HWA742
96 &hwa742_ctrl,
97#endif
98};
99
100#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
101extern struct lcd_ctrl_extif omap1_ext_if;
102#endif
103
104static void omapfb_rqueue_lock(struct omapfb_device *fbdev)
105{
106 mutex_lock(&fbdev->rqueue_mutex);
107}
108
109static void omapfb_rqueue_unlock(struct omapfb_device *fbdev)
110{
111 mutex_unlock(&fbdev->rqueue_mutex);
112}
113
114/*
115 * ---------------------------------------------------------------------------
116 * LCD controller and LCD DMA
117 * ---------------------------------------------------------------------------
118 */
119/*
120 * Allocate resources needed for LCD controller and LCD DMA operations. Video
121 * memory is allocated from system memory according to the virtual display
122 * size, except if a bigger memory size is specified explicitly as a kernel
123 * parameter.
124 */
125static int ctrl_init(struct omapfb_device *fbdev)
126{
127 int r;
128 int i;
129
130 /* kernel/module vram parameters override boot tags/board config */
131 if (def_vram_cnt) {
132 for (i = 0; i < def_vram_cnt; i++)
133 fbdev->mem_desc.region[i].size =
134 PAGE_ALIGN(def_vram[i]);
135 fbdev->mem_desc.region_cnt = i;
136 }
137
138 if (!fbdev->mem_desc.region_cnt) {
139 struct lcd_panel *panel = fbdev->panel;
140 int def_size;
141 int bpp = panel->bpp;
142
143 /* 12 bpp is packed in 16 bits */
144 if (bpp == 12)
145 bpp = 16;
146 def_size = def_vxres * def_vyres * bpp / 8;
147 fbdev->mem_desc.region_cnt = 1;
148 fbdev->mem_desc.region[0].size = PAGE_ALIGN(def_size);
149 }
150 r = fbdev->ctrl->init(fbdev, 0, &fbdev->mem_desc);
151 if (r < 0) {
152 dev_err(fbdev->dev, "controller initialization failed (%d)\n",
153 r);
154 return r;
155 }
156
157#ifdef DEBUG
158 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
159 dev_dbg(fbdev->dev, "region%d phys %08x virt %p size=%lu\n",
160 i,
161 fbdev->mem_desc.region[i].paddr,
162 fbdev->mem_desc.region[i].vaddr,
163 fbdev->mem_desc.region[i].size);
164 }
165#endif
166 return 0;
167}
168
169static void ctrl_cleanup(struct omapfb_device *fbdev)
170{
171 fbdev->ctrl->cleanup();
172}
173
174/* Must be called with fbdev->rqueue_mutex held. */
175static int ctrl_change_mode(struct fb_info *fbi)
176{
177 int r;
178 unsigned long offset;
179 struct omapfb_plane_struct *plane = fbi->par;
180 struct omapfb_device *fbdev = plane->fbdev;
181 struct fb_var_screeninfo *var = &fbi->var;
182
183 offset = var->yoffset * fbi->fix.line_length +
184 var->xoffset * var->bits_per_pixel / 8;
185
186 if (fbdev->ctrl->sync)
187 fbdev->ctrl->sync();
188 r = fbdev->ctrl->setup_plane(plane->idx, plane->info.channel_out,
189 offset, var->xres_virtual,
190 plane->info.pos_x, plane->info.pos_y,
191 var->xres, var->yres, plane->color_mode);
192 if (r < 0)
193 return r;
194
195 if (fbdev->ctrl->set_rotate != NULL) {
196 r = fbdev->ctrl->set_rotate(var->rotate);
197 if (r < 0)
198 return r;
199 }
200
201 if (fbdev->ctrl->set_scale != NULL)
202 r = fbdev->ctrl->set_scale(plane->idx,
203 var->xres, var->yres,
204 plane->info.out_width,
205 plane->info.out_height);
206
207 return r;
208}
209
210/*
211 * ---------------------------------------------------------------------------
212 * fbdev framework callbacks and the ioctl interface
213 * ---------------------------------------------------------------------------
214 */
215/* Called each time the omapfb device is opened */
216static int omapfb_open(struct fb_info *info, int user)
217{
218 return 0;
219}
220
221static void omapfb_sync(struct fb_info *info);
222
223/* Called when the omapfb device is closed. We make sure that any pending
224 * gfx DMA operations are ended, before we return. */
225static int omapfb_release(struct fb_info *info, int user)
226{
227 omapfb_sync(info);
228 return 0;
229}
230
231/* Store a single color palette entry into a pseudo palette or the hardware
232 * palette if one is available. For now we support only 16bpp and thus store
233 * the entry only to the pseudo palette.
234 */
235static int _setcolreg(struct fb_info *info, u_int regno, u_int red, u_int green,
236 u_int blue, u_int transp, int update_hw_pal)
237{
238 struct omapfb_plane_struct *plane = info->par;
239 struct omapfb_device *fbdev = plane->fbdev;
240 struct fb_var_screeninfo *var = &info->var;
241 int r = 0;
242
243 switch (plane->color_mode) {
244 case OMAPFB_COLOR_YUV422:
245 case OMAPFB_COLOR_YUV420:
246 case OMAPFB_COLOR_YUY422:
247 r = -EINVAL;
248 break;
249 case OMAPFB_COLOR_CLUT_8BPP:
250 case OMAPFB_COLOR_CLUT_4BPP:
251 case OMAPFB_COLOR_CLUT_2BPP:
252 case OMAPFB_COLOR_CLUT_1BPP:
253 if (fbdev->ctrl->setcolreg)
254 r = fbdev->ctrl->setcolreg(regno, red, green, blue,
255 transp, update_hw_pal);
256 fallthrough;
257 case OMAPFB_COLOR_RGB565:
258 case OMAPFB_COLOR_RGB444:
259 if (r != 0)
260 break;
261
262 if (regno < 16) {
263 u16 pal;
264 pal = ((red >> (16 - var->red.length)) <<
265 var->red.offset) |
266 ((green >> (16 - var->green.length)) <<
267 var->green.offset) |
268 (blue >> (16 - var->blue.length));
269 ((u32 *)(info->pseudo_palette))[regno] = pal;
270 }
271 break;
272 default:
273 BUG();
274 }
275 return r;
276}
277
278static int omapfb_setcolreg(u_int regno, u_int red, u_int green, u_int blue,
279 u_int transp, struct fb_info *info)
280{
281 return _setcolreg(info, regno, red, green, blue, transp, 1);
282}
283
284static int omapfb_setcmap(struct fb_cmap *cmap, struct fb_info *info)
285{
286 int count, index, r;
287 u16 *red, *green, *blue, *transp;
288 u16 trans = 0xffff;
289
290 red = cmap->red;
291 green = cmap->green;
292 blue = cmap->blue;
293 transp = cmap->transp;
294 index = cmap->start;
295
296 for (count = 0; count < cmap->len; count++) {
297 if (transp)
298 trans = *transp++;
299 r = _setcolreg(info, index++, *red++, *green++, *blue++, trans,
300 count == cmap->len - 1);
301 if (r != 0)
302 return r;
303 }
304
305 return 0;
306}
307
308static int omapfb_update_full_screen(struct fb_info *fbi);
309
310static int omapfb_blank(int blank, struct fb_info *fbi)
311{
312 struct omapfb_plane_struct *plane = fbi->par;
313 struct omapfb_device *fbdev = plane->fbdev;
314 int do_update = 0;
315 int r = 0;
316
317 omapfb_rqueue_lock(fbdev);
318 switch (blank) {
319 case FB_BLANK_UNBLANK:
320 if (fbdev->state == OMAPFB_SUSPENDED) {
321 if (fbdev->ctrl->resume)
322 fbdev->ctrl->resume();
323 if (fbdev->panel->enable)
324 fbdev->panel->enable(fbdev->panel);
325 fbdev->state = OMAPFB_ACTIVE;
326 if (fbdev->ctrl->get_update_mode() ==
327 OMAPFB_MANUAL_UPDATE)
328 do_update = 1;
329 }
330 break;
331 case FB_BLANK_POWERDOWN:
332 if (fbdev->state == OMAPFB_ACTIVE) {
333 if (fbdev->panel->disable)
334 fbdev->panel->disable(fbdev->panel);
335 if (fbdev->ctrl->suspend)
336 fbdev->ctrl->suspend();
337 fbdev->state = OMAPFB_SUSPENDED;
338 }
339 break;
340 default:
341 r = -EINVAL;
342 }
343 omapfb_rqueue_unlock(fbdev);
344
345 if (r == 0 && do_update)
346 r = omapfb_update_full_screen(fbi);
347
348 return r;
349}
350
351static void omapfb_sync(struct fb_info *fbi)
352{
353 struct omapfb_plane_struct *plane = fbi->par;
354 struct omapfb_device *fbdev = plane->fbdev;
355
356 omapfb_rqueue_lock(fbdev);
357 if (fbdev->ctrl->sync)
358 fbdev->ctrl->sync();
359 omapfb_rqueue_unlock(fbdev);
360}
361
362/*
363 * Set fb_info.fix fields and also updates fbdev.
364 * When calling this fb_info.var must be set up already.
365 */
366static void set_fb_fix(struct fb_info *fbi, int from_init)
367{
368 struct fb_fix_screeninfo *fix = &fbi->fix;
369 struct fb_var_screeninfo *var = &fbi->var;
370 struct omapfb_plane_struct *plane = fbi->par;
371 struct omapfb_mem_region *rg;
372 int bpp;
373
374 rg = &plane->fbdev->mem_desc.region[plane->idx];
375 fbi->screen_base = rg->vaddr;
376
377 if (!from_init) {
378 mutex_lock(&fbi->mm_lock);
379 fix->smem_start = rg->paddr;
380 fix->smem_len = rg->size;
381 mutex_unlock(&fbi->mm_lock);
382 } else {
383 fix->smem_start = rg->paddr;
384 fix->smem_len = rg->size;
385 }
386
387 fix->type = FB_TYPE_PACKED_PIXELS;
388 bpp = var->bits_per_pixel;
389 if (var->nonstd)
390 fix->visual = FB_VISUAL_PSEUDOCOLOR;
391 else switch (var->bits_per_pixel) {
392 case 16:
393 case 12:
394 fix->visual = FB_VISUAL_TRUECOLOR;
395 /* 12bpp is stored in 16 bits */
396 bpp = 16;
397 break;
398 case 1:
399 case 2:
400 case 4:
401 case 8:
402 fix->visual = FB_VISUAL_PSEUDOCOLOR;
403 break;
404 }
405 fix->accel = FB_ACCEL_OMAP1610;
406 fix->line_length = var->xres_virtual * bpp / 8;
407}
408
409static int set_color_mode(struct omapfb_plane_struct *plane,
410 struct fb_var_screeninfo *var)
411{
412 switch (var->nonstd) {
413 case 0:
414 break;
415 case OMAPFB_COLOR_YUV422:
416 var->bits_per_pixel = 16;
417 plane->color_mode = var->nonstd;
418 return 0;
419 case OMAPFB_COLOR_YUV420:
420 var->bits_per_pixel = 12;
421 plane->color_mode = var->nonstd;
422 return 0;
423 case OMAPFB_COLOR_YUY422:
424 var->bits_per_pixel = 16;
425 plane->color_mode = var->nonstd;
426 return 0;
427 default:
428 return -EINVAL;
429 }
430
431 switch (var->bits_per_pixel) {
432 case 1:
433 plane->color_mode = OMAPFB_COLOR_CLUT_1BPP;
434 return 0;
435 case 2:
436 plane->color_mode = OMAPFB_COLOR_CLUT_2BPP;
437 return 0;
438 case 4:
439 plane->color_mode = OMAPFB_COLOR_CLUT_4BPP;
440 return 0;
441 case 8:
442 plane->color_mode = OMAPFB_COLOR_CLUT_8BPP;
443 return 0;
444 case 12:
445 var->bits_per_pixel = 16;
446 fallthrough;
447 case 16:
448 if (plane->fbdev->panel->bpp == 12)
449 plane->color_mode = OMAPFB_COLOR_RGB444;
450 else
451 plane->color_mode = OMAPFB_COLOR_RGB565;
452 return 0;
453 default:
454 return -EINVAL;
455 }
456}
457
458/*
459 * Check the values in var against our capabilities and in case of out of
460 * bound values try to adjust them.
461 */
462static int set_fb_var(struct fb_info *fbi,
463 struct fb_var_screeninfo *var)
464{
465 int bpp;
466 unsigned long max_frame_size;
467 unsigned long line_size;
468 int xres_min, xres_max;
469 int yres_min, yres_max;
470 struct omapfb_plane_struct *plane = fbi->par;
471 struct omapfb_device *fbdev = plane->fbdev;
472 struct lcd_panel *panel = fbdev->panel;
473
474 if (set_color_mode(plane, var) < 0)
475 return -EINVAL;
476
477 bpp = var->bits_per_pixel;
478 if (plane->color_mode == OMAPFB_COLOR_RGB444)
479 bpp = 16;
480
481 switch (var->rotate) {
482 case 0:
483 case 180:
484 xres_min = OMAPFB_PLANE_XRES_MIN;
485 xres_max = panel->x_res;
486 yres_min = OMAPFB_PLANE_YRES_MIN;
487 yres_max = panel->y_res;
488 if (cpu_is_omap15xx()) {
489 var->xres = panel->x_res;
490 var->yres = panel->y_res;
491 }
492 break;
493 case 90:
494 case 270:
495 xres_min = OMAPFB_PLANE_YRES_MIN;
496 xres_max = panel->y_res;
497 yres_min = OMAPFB_PLANE_XRES_MIN;
498 yres_max = panel->x_res;
499 if (cpu_is_omap15xx()) {
500 var->xres = panel->y_res;
501 var->yres = panel->x_res;
502 }
503 break;
504 default:
505 return -EINVAL;
506 }
507
508 if (var->xres < xres_min)
509 var->xres = xres_min;
510 if (var->yres < yres_min)
511 var->yres = yres_min;
512 if (var->xres > xres_max)
513 var->xres = xres_max;
514 if (var->yres > yres_max)
515 var->yres = yres_max;
516
517 if (var->xres_virtual < var->xres)
518 var->xres_virtual = var->xres;
519 if (var->yres_virtual < var->yres)
520 var->yres_virtual = var->yres;
521 max_frame_size = fbdev->mem_desc.region[plane->idx].size;
522 line_size = var->xres_virtual * bpp / 8;
523 if (line_size * var->yres_virtual > max_frame_size) {
524 /* Try to keep yres_virtual first */
525 line_size = max_frame_size / var->yres_virtual;
526 var->xres_virtual = line_size * 8 / bpp;
527 if (var->xres_virtual < var->xres) {
528 /* Still doesn't fit. Shrink yres_virtual too */
529 var->xres_virtual = var->xres;
530 line_size = var->xres * bpp / 8;
531 var->yres_virtual = max_frame_size / line_size;
532 }
533 /* Recheck this, as the virtual size changed. */
534 if (var->xres_virtual < var->xres)
535 var->xres = var->xres_virtual;
536 if (var->yres_virtual < var->yres)
537 var->yres = var->yres_virtual;
538 if (var->xres < xres_min || var->yres < yres_min)
539 return -EINVAL;
540 }
541 if (var->xres + var->xoffset > var->xres_virtual)
542 var->xoffset = var->xres_virtual - var->xres;
543 if (var->yres + var->yoffset > var->yres_virtual)
544 var->yoffset = var->yres_virtual - var->yres;
545
546 if (plane->color_mode == OMAPFB_COLOR_RGB444) {
547 var->red.offset = 8;
548 var->red.length = 4;
549 var->red.msb_right = 0;
550 var->green.offset = 4;
551 var->green.length = 4;
552 var->green.msb_right = 0;
553 var->blue.offset = 0;
554 var->blue.length = 4;
555 var->blue.msb_right = 0;
556 } else {
557 var->red.offset = 11;
558 var->red.length = 5;
559 var->red.msb_right = 0;
560 var->green.offset = 5;
561 var->green.length = 6;
562 var->green.msb_right = 0;
563 var->blue.offset = 0;
564 var->blue.length = 5;
565 var->blue.msb_right = 0;
566 }
567
568 var->height = -1;
569 var->width = -1;
570 var->grayscale = 0;
571
572 /* pixclock in ps, the rest in pixclock */
573 var->pixclock = 10000000 / (panel->pixel_clock / 100);
574 var->left_margin = panel->hfp;
575 var->right_margin = panel->hbp;
576 var->upper_margin = panel->vfp;
577 var->lower_margin = panel->vbp;
578 var->hsync_len = panel->hsw;
579 var->vsync_len = panel->vsw;
580
581 /* TODO: get these from panel->config */
582 var->vmode = FB_VMODE_NONINTERLACED;
583 var->sync = 0;
584
585 return 0;
586}
587
588
589/*
590 * Set new x,y offsets in the virtual display for the visible area and switch
591 * to the new mode.
592 */
593static int omapfb_pan_display(struct fb_var_screeninfo *var,
594 struct fb_info *fbi)
595{
596 struct omapfb_plane_struct *plane = fbi->par;
597 struct omapfb_device *fbdev = plane->fbdev;
598 int r = 0;
599
600 omapfb_rqueue_lock(fbdev);
601 if (var->xoffset != fbi->var.xoffset ||
602 var->yoffset != fbi->var.yoffset) {
603 struct fb_var_screeninfo *new_var = &fbdev->new_var;
604
605 memcpy(new_var, &fbi->var, sizeof(*new_var));
606 new_var->xoffset = var->xoffset;
607 new_var->yoffset = var->yoffset;
608 if (set_fb_var(fbi, new_var))
609 r = -EINVAL;
610 else {
611 memcpy(&fbi->var, new_var, sizeof(*new_var));
612 ctrl_change_mode(fbi);
613 }
614 }
615 omapfb_rqueue_unlock(fbdev);
616
617 return r;
618}
619
620/* Set mirror to vertical axis and switch to the new mode. */
621static int omapfb_mirror(struct fb_info *fbi, int mirror)
622{
623 struct omapfb_plane_struct *plane = fbi->par;
624 struct omapfb_device *fbdev = plane->fbdev;
625 int r = 0;
626
627 omapfb_rqueue_lock(fbdev);
628 mirror = mirror ? 1 : 0;
629 if (cpu_is_omap15xx())
630 r = -EINVAL;
631 else if (mirror != plane->info.mirror) {
632 plane->info.mirror = mirror;
633 r = ctrl_change_mode(fbi);
634 }
635 omapfb_rqueue_unlock(fbdev);
636
637 return r;
638}
639
640/*
641 * Check values in var, try to adjust them in case of out of bound values if
642 * possible, or return error.
643 */
644static int omapfb_check_var(struct fb_var_screeninfo *var, struct fb_info *fbi)
645{
646 struct omapfb_plane_struct *plane = fbi->par;
647 struct omapfb_device *fbdev = plane->fbdev;
648 int r;
649
650 omapfb_rqueue_lock(fbdev);
651 if (fbdev->ctrl->sync != NULL)
652 fbdev->ctrl->sync();
653 r = set_fb_var(fbi, var);
654 omapfb_rqueue_unlock(fbdev);
655
656 return r;
657}
658
659/*
660 * Switch to a new mode. The parameters for it has been check already by
661 * omapfb_check_var.
662 */
663static int omapfb_set_par(struct fb_info *fbi)
664{
665 struct omapfb_plane_struct *plane = fbi->par;
666 struct omapfb_device *fbdev = plane->fbdev;
667 int r = 0;
668
669 omapfb_rqueue_lock(fbdev);
670 set_fb_fix(fbi, 0);
671 r = ctrl_change_mode(fbi);
672 omapfb_rqueue_unlock(fbdev);
673
674 return r;
675}
676
677static int omapfb_update_window_async(struct fb_info *fbi,
678 struct omapfb_update_window *win,
679 void (*callback)(void *),
680 void *callback_data)
681{
682 int xres, yres;
683 struct omapfb_plane_struct *plane = fbi->par;
684 struct omapfb_device *fbdev = plane->fbdev;
685 struct fb_var_screeninfo *var = &fbi->var;
686
687 switch (var->rotate) {
688 case 0:
689 case 180:
690 xres = fbdev->panel->x_res;
691 yres = fbdev->panel->y_res;
692 break;
693 case 90:
694 case 270:
695 xres = fbdev->panel->y_res;
696 yres = fbdev->panel->x_res;
697 break;
698 default:
699 return -EINVAL;
700 }
701
702 if (win->x >= xres || win->y >= yres ||
703 win->out_x > xres || win->out_y > yres)
704 return -EINVAL;
705
706 if (!fbdev->ctrl->update_window ||
707 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
708 return -ENODEV;
709
710 if (win->x + win->width > xres)
711 win->width = xres - win->x;
712 if (win->y + win->height > yres)
713 win->height = yres - win->y;
714 if (win->out_x + win->out_width > xres)
715 win->out_width = xres - win->out_x;
716 if (win->out_y + win->out_height > yres)
717 win->out_height = yres - win->out_y;
718 if (!win->width || !win->height || !win->out_width || !win->out_height)
719 return 0;
720
721 return fbdev->ctrl->update_window(fbi, win, callback, callback_data);
722}
723
724static int omapfb_update_win(struct fb_info *fbi,
725 struct omapfb_update_window *win)
726{
727 struct omapfb_plane_struct *plane = fbi->par;
728 int ret;
729
730 omapfb_rqueue_lock(plane->fbdev);
731 ret = omapfb_update_window_async(fbi, win, NULL, NULL);
732 omapfb_rqueue_unlock(plane->fbdev);
733
734 return ret;
735}
736
737static int omapfb_update_full_screen(struct fb_info *fbi)
738{
739 struct omapfb_plane_struct *plane = fbi->par;
740 struct omapfb_device *fbdev = plane->fbdev;
741 struct omapfb_update_window win;
742 int r;
743
744 if (!fbdev->ctrl->update_window ||
745 fbdev->ctrl->get_update_mode() != OMAPFB_MANUAL_UPDATE)
746 return -ENODEV;
747
748 win.x = 0;
749 win.y = 0;
750 win.width = fbi->var.xres;
751 win.height = fbi->var.yres;
752 win.out_x = 0;
753 win.out_y = 0;
754 win.out_width = fbi->var.xres;
755 win.out_height = fbi->var.yres;
756 win.format = 0;
757
758 omapfb_rqueue_lock(fbdev);
759 r = fbdev->ctrl->update_window(fbi, &win, NULL, NULL);
760 omapfb_rqueue_unlock(fbdev);
761
762 return r;
763}
764
765static int omapfb_setup_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
766{
767 struct omapfb_plane_struct *plane = fbi->par;
768 struct omapfb_device *fbdev = plane->fbdev;
769 struct lcd_panel *panel = fbdev->panel;
770 struct omapfb_plane_info old_info;
771 int r = 0;
772
773 if (pi->pos_x + pi->out_width > panel->x_res ||
774 pi->pos_y + pi->out_height > panel->y_res)
775 return -EINVAL;
776
777 omapfb_rqueue_lock(fbdev);
778 if (pi->enabled && !fbdev->mem_desc.region[plane->idx].size) {
779 /*
780 * This plane's memory was freed, can't enable it
781 * until it's reallocated.
782 */
783 r = -EINVAL;
784 goto out;
785 }
786 old_info = plane->info;
787 plane->info = *pi;
788 if (pi->enabled) {
789 r = ctrl_change_mode(fbi);
790 if (r < 0) {
791 plane->info = old_info;
792 goto out;
793 }
794 }
795 r = fbdev->ctrl->enable_plane(plane->idx, pi->enabled);
796 if (r < 0) {
797 plane->info = old_info;
798 goto out;
799 }
800out:
801 omapfb_rqueue_unlock(fbdev);
802 return r;
803}
804
805static int omapfb_query_plane(struct fb_info *fbi, struct omapfb_plane_info *pi)
806{
807 struct omapfb_plane_struct *plane = fbi->par;
808
809 *pi = plane->info;
810 return 0;
811}
812
813static int omapfb_setup_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
814{
815 struct omapfb_plane_struct *plane = fbi->par;
816 struct omapfb_device *fbdev = plane->fbdev;
817 struct omapfb_mem_region *rg = &fbdev->mem_desc.region[plane->idx];
818 size_t size;
819 int r = 0;
820
821 if (fbdev->ctrl->setup_mem == NULL)
822 return -ENODEV;
823 if (mi->type != OMAPFB_MEMTYPE_SDRAM)
824 return -EINVAL;
825
826 size = PAGE_ALIGN(mi->size);
827 omapfb_rqueue_lock(fbdev);
828 if (plane->info.enabled) {
829 r = -EBUSY;
830 goto out;
831 }
832 if (rg->size != size || rg->type != mi->type) {
833 struct fb_var_screeninfo *new_var = &fbdev->new_var;
834 unsigned long old_size = rg->size;
835 u8 old_type = rg->type;
836 unsigned long paddr;
837
838 rg->size = size;
839 rg->type = mi->type;
840 /*
841 * size == 0 is a special case, for which we
842 * don't check / adjust the screen parameters.
843 * This isn't a problem since the plane can't
844 * be reenabled unless its size is > 0.
845 */
846 if (old_size != size && size) {
847 if (size) {
848 memcpy(new_var, &fbi->var, sizeof(*new_var));
849 r = set_fb_var(fbi, new_var);
850 if (r < 0)
851 goto out;
852 }
853 }
854
855 if (fbdev->ctrl->sync)
856 fbdev->ctrl->sync();
857 r = fbdev->ctrl->setup_mem(plane->idx, size, mi->type, &paddr);
858 if (r < 0) {
859 /* Revert changes. */
860 rg->size = old_size;
861 rg->type = old_type;
862 goto out;
863 }
864 rg->paddr = paddr;
865
866 if (old_size != size) {
867 if (size) {
868 memcpy(&fbi->var, new_var, sizeof(fbi->var));
869 set_fb_fix(fbi, 0);
870 } else {
871 /*
872 * Set these explicitly to indicate that the
873 * plane memory is dealloce'd, the other
874 * screen parameters in var / fix are invalid.
875 */
876 mutex_lock(&fbi->mm_lock);
877 fbi->fix.smem_start = 0;
878 fbi->fix.smem_len = 0;
879 mutex_unlock(&fbi->mm_lock);
880 }
881 }
882 }
883out:
884 omapfb_rqueue_unlock(fbdev);
885
886 return r;
887}
888
889static int omapfb_query_mem(struct fb_info *fbi, struct omapfb_mem_info *mi)
890{
891 struct omapfb_plane_struct *plane = fbi->par;
892 struct omapfb_device *fbdev = plane->fbdev;
893 struct omapfb_mem_region *rg;
894
895 rg = &fbdev->mem_desc.region[plane->idx];
896 memset(mi, 0, sizeof(*mi));
897 mi->size = rg->size;
898 mi->type = rg->type;
899
900 return 0;
901}
902
903static int omapfb_set_color_key(struct omapfb_device *fbdev,
904 struct omapfb_color_key *ck)
905{
906 int r;
907
908 if (!fbdev->ctrl->set_color_key)
909 return -ENODEV;
910
911 omapfb_rqueue_lock(fbdev);
912 r = fbdev->ctrl->set_color_key(ck);
913 omapfb_rqueue_unlock(fbdev);
914
915 return r;
916}
917
918static int omapfb_get_color_key(struct omapfb_device *fbdev,
919 struct omapfb_color_key *ck)
920{
921 int r;
922
923 if (!fbdev->ctrl->get_color_key)
924 return -ENODEV;
925
926 omapfb_rqueue_lock(fbdev);
927 r = fbdev->ctrl->get_color_key(ck);
928 omapfb_rqueue_unlock(fbdev);
929
930 return r;
931}
932
933static struct blocking_notifier_head omapfb_client_list[OMAPFB_PLANE_NUM];
934static int notifier_inited;
935
936static void omapfb_init_notifier(void)
937{
938 int i;
939
940 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
941 BLOCKING_INIT_NOTIFIER_HEAD(&omapfb_client_list[i]);
942}
943
944int omapfb_register_client(struct omapfb_notifier_block *omapfb_nb,
945 omapfb_notifier_callback_t callback,
946 void *callback_data)
947{
948 int r;
949
950 if ((unsigned)omapfb_nb->plane_idx >= OMAPFB_PLANE_NUM)
951 return -EINVAL;
952
953 if (!notifier_inited) {
954 omapfb_init_notifier();
955 notifier_inited = 1;
956 }
957
958 omapfb_nb->nb.notifier_call = (int (*)(struct notifier_block *,
959 unsigned long, void *))callback;
960 omapfb_nb->data = callback_data;
961 r = blocking_notifier_chain_register(
962 &omapfb_client_list[omapfb_nb->plane_idx],
963 &omapfb_nb->nb);
964 if (r)
965 return r;
966 if (omapfb_dev != NULL &&
967 omapfb_dev->ctrl && omapfb_dev->ctrl->bind_client) {
968 omapfb_dev->ctrl->bind_client(omapfb_nb);
969 }
970
971 return 0;
972}
973EXPORT_SYMBOL(omapfb_register_client);
974
975int omapfb_unregister_client(struct omapfb_notifier_block *omapfb_nb)
976{
977 return blocking_notifier_chain_unregister(
978 &omapfb_client_list[omapfb_nb->plane_idx], &omapfb_nb->nb);
979}
980EXPORT_SYMBOL(omapfb_unregister_client);
981
982void omapfb_notify_clients(struct omapfb_device *fbdev, unsigned long event)
983{
984 int i;
985
986 if (!notifier_inited)
987 /* no client registered yet */
988 return;
989
990 for (i = 0; i < OMAPFB_PLANE_NUM; i++)
991 blocking_notifier_call_chain(&omapfb_client_list[i], event,
992 fbdev->fb_info[i]);
993}
994EXPORT_SYMBOL(omapfb_notify_clients);
995
996static int omapfb_set_update_mode(struct omapfb_device *fbdev,
997 enum omapfb_update_mode mode)
998{
999 int r;
1000
1001 omapfb_rqueue_lock(fbdev);
1002 r = fbdev->ctrl->set_update_mode(mode);
1003 omapfb_rqueue_unlock(fbdev);
1004
1005 return r;
1006}
1007
1008static enum omapfb_update_mode omapfb_get_update_mode(struct omapfb_device *fbdev)
1009{
1010 int r;
1011
1012 omapfb_rqueue_lock(fbdev);
1013 r = fbdev->ctrl->get_update_mode();
1014 omapfb_rqueue_unlock(fbdev);
1015
1016 return r;
1017}
1018
1019static void omapfb_get_caps(struct omapfb_device *fbdev, int plane,
1020 struct omapfb_caps *caps)
1021{
1022 memset(caps, 0, sizeof(*caps));
1023 fbdev->ctrl->get_caps(plane, caps);
1024 if (fbdev->panel->get_caps)
1025 caps->ctrl |= fbdev->panel->get_caps(fbdev->panel);
1026}
1027
1028/* For lcd testing */
1029void omapfb_write_first_pixel(struct omapfb_device *fbdev, u16 pixval)
1030{
1031 omapfb_rqueue_lock(fbdev);
1032 *(u16 *)fbdev->mem_desc.region[0].vaddr = pixval;
1033 if (fbdev->ctrl->get_update_mode() == OMAPFB_MANUAL_UPDATE) {
1034 struct omapfb_update_window win;
1035
1036 memset(&win, 0, sizeof(win));
1037 win.width = 2;
1038 win.height = 2;
1039 win.out_width = 2;
1040 win.out_height = 2;
1041 fbdev->ctrl->update_window(fbdev->fb_info[0], &win, NULL, NULL);
1042 }
1043 omapfb_rqueue_unlock(fbdev);
1044}
1045EXPORT_SYMBOL(omapfb_write_first_pixel);
1046
1047/*
1048 * Ioctl interface. Part of the kernel mode frame buffer API is duplicated
1049 * here to be accessible by user mode code.
1050 */
1051static int omapfb_ioctl(struct fb_info *fbi, unsigned int cmd,
1052 unsigned long arg)
1053{
1054 struct omapfb_plane_struct *plane = fbi->par;
1055 struct omapfb_device *fbdev = plane->fbdev;
1056 const struct fb_ops *ops = fbi->fbops;
1057 union {
1058 struct omapfb_update_window update_window;
1059 struct omapfb_plane_info plane_info;
1060 struct omapfb_mem_info mem_info;
1061 struct omapfb_color_key color_key;
1062 enum omapfb_update_mode update_mode;
1063 struct omapfb_caps caps;
1064 unsigned int mirror;
1065 int plane_out;
1066 int enable_plane;
1067 } p;
1068 int r = 0;
1069
1070 BUG_ON(!ops);
1071 switch (cmd) {
1072 case OMAPFB_MIRROR:
1073 if (get_user(p.mirror, (int __user *)arg))
1074 r = -EFAULT;
1075 else
1076 omapfb_mirror(fbi, p.mirror);
1077 break;
1078 case OMAPFB_SYNC_GFX:
1079 omapfb_sync(fbi);
1080 break;
1081 case OMAPFB_VSYNC:
1082 break;
1083 case OMAPFB_SET_UPDATE_MODE:
1084 if (get_user(p.update_mode, (int __user *)arg))
1085 r = -EFAULT;
1086 else
1087 r = omapfb_set_update_mode(fbdev, p.update_mode);
1088 break;
1089 case OMAPFB_GET_UPDATE_MODE:
1090 p.update_mode = omapfb_get_update_mode(fbdev);
1091 if (put_user(p.update_mode,
1092 (enum omapfb_update_mode __user *)arg))
1093 r = -EFAULT;
1094 break;
1095 case OMAPFB_UPDATE_WINDOW_OLD:
1096 if (copy_from_user(&p.update_window, (void __user *)arg,
1097 sizeof(struct omapfb_update_window_old)))
1098 r = -EFAULT;
1099 else {
1100 struct omapfb_update_window *u = &p.update_window;
1101 u->out_x = u->x;
1102 u->out_y = u->y;
1103 u->out_width = u->width;
1104 u->out_height = u->height;
1105 memset(u->reserved, 0, sizeof(u->reserved));
1106 r = omapfb_update_win(fbi, u);
1107 }
1108 break;
1109 case OMAPFB_UPDATE_WINDOW:
1110 if (copy_from_user(&p.update_window, (void __user *)arg,
1111 sizeof(p.update_window)))
1112 r = -EFAULT;
1113 else
1114 r = omapfb_update_win(fbi, &p.update_window);
1115 break;
1116 case OMAPFB_SETUP_PLANE:
1117 if (copy_from_user(&p.plane_info, (void __user *)arg,
1118 sizeof(p.plane_info)))
1119 r = -EFAULT;
1120 else
1121 r = omapfb_setup_plane(fbi, &p.plane_info);
1122 break;
1123 case OMAPFB_QUERY_PLANE:
1124 if ((r = omapfb_query_plane(fbi, &p.plane_info)) < 0)
1125 break;
1126 if (copy_to_user((void __user *)arg, &p.plane_info,
1127 sizeof(p.plane_info)))
1128 r = -EFAULT;
1129 break;
1130 case OMAPFB_SETUP_MEM:
1131 if (copy_from_user(&p.mem_info, (void __user *)arg,
1132 sizeof(p.mem_info)))
1133 r = -EFAULT;
1134 else
1135 r = omapfb_setup_mem(fbi, &p.mem_info);
1136 break;
1137 case OMAPFB_QUERY_MEM:
1138 if ((r = omapfb_query_mem(fbi, &p.mem_info)) < 0)
1139 break;
1140 if (copy_to_user((void __user *)arg, &p.mem_info,
1141 sizeof(p.mem_info)))
1142 r = -EFAULT;
1143 break;
1144 case OMAPFB_SET_COLOR_KEY:
1145 if (copy_from_user(&p.color_key, (void __user *)arg,
1146 sizeof(p.color_key)))
1147 r = -EFAULT;
1148 else
1149 r = omapfb_set_color_key(fbdev, &p.color_key);
1150 break;
1151 case OMAPFB_GET_COLOR_KEY:
1152 if ((r = omapfb_get_color_key(fbdev, &p.color_key)) < 0)
1153 break;
1154 if (copy_to_user((void __user *)arg, &p.color_key,
1155 sizeof(p.color_key)))
1156 r = -EFAULT;
1157 break;
1158 case OMAPFB_GET_CAPS:
1159 omapfb_get_caps(fbdev, plane->idx, &p.caps);
1160 if (copy_to_user((void __user *)arg, &p.caps, sizeof(p.caps)))
1161 r = -EFAULT;
1162 break;
1163 case OMAPFB_LCD_TEST:
1164 {
1165 int test_num;
1166
1167 if (get_user(test_num, (int __user *)arg)) {
1168 r = -EFAULT;
1169 break;
1170 }
1171 if (!fbdev->panel->run_test) {
1172 r = -EINVAL;
1173 break;
1174 }
1175 r = fbdev->panel->run_test(fbdev->panel, test_num);
1176 break;
1177 }
1178 case OMAPFB_CTRL_TEST:
1179 {
1180 int test_num;
1181
1182 if (get_user(test_num, (int __user *)arg)) {
1183 r = -EFAULT;
1184 break;
1185 }
1186 if (!fbdev->ctrl->run_test) {
1187 r = -EINVAL;
1188 break;
1189 }
1190 r = fbdev->ctrl->run_test(test_num);
1191 break;
1192 }
1193 default:
1194 r = -EINVAL;
1195 }
1196
1197 return r;
1198}
1199
1200static int omapfb_mmap(struct fb_info *info, struct vm_area_struct *vma)
1201{
1202 struct omapfb_plane_struct *plane = info->par;
1203 struct omapfb_device *fbdev = plane->fbdev;
1204 int r;
1205
1206 vma->vm_page_prot = pgprot_decrypted(vma->vm_page_prot);
1207
1208 omapfb_rqueue_lock(fbdev);
1209 r = fbdev->ctrl->mmap(info, vma);
1210 omapfb_rqueue_unlock(fbdev);
1211
1212 return r;
1213}
1214
1215/*
1216 * Callback table for the frame buffer framework. Some of these pointers
1217 * will be changed according to the current setting of fb_info->accel_flags.
1218 */
1219static struct fb_ops omapfb_ops = {
1220 .owner = THIS_MODULE,
1221 FB_DEFAULT_IOMEM_OPS,
1222 .fb_open = omapfb_open,
1223 .fb_release = omapfb_release,
1224 .fb_setcolreg = omapfb_setcolreg,
1225 .fb_setcmap = omapfb_setcmap,
1226 .fb_blank = omapfb_blank,
1227 .fb_ioctl = omapfb_ioctl,
1228 .fb_check_var = omapfb_check_var,
1229 .fb_set_par = omapfb_set_par,
1230 .fb_pan_display = omapfb_pan_display,
1231};
1232
1233/*
1234 * ---------------------------------------------------------------------------
1235 * Sysfs interface
1236 * ---------------------------------------------------------------------------
1237 */
1238/* omapfbX sysfs entries */
1239static ssize_t omapfb_show_caps_num(struct device *dev,
1240 struct device_attribute *attr, char *buf)
1241{
1242 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1243 int plane;
1244 size_t size = 0;
1245 struct omapfb_caps caps;
1246
1247 plane = 0;
1248 while (plane < OMAPFB_PLANE_NUM) {
1249 omapfb_get_caps(fbdev, plane, &caps);
1250 size += sysfs_emit_at(buf, size,
1251 "plane#%d %#010x %#010x %#010x\n",
1252 plane, caps.ctrl, caps.plane_color, caps.wnd_color);
1253 plane++;
1254 }
1255 return size;
1256}
1257
1258static ssize_t omapfb_show_caps_text(struct device *dev,
1259 struct device_attribute *attr, char *buf)
1260{
1261 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1262 int i;
1263 struct omapfb_caps caps;
1264 int plane;
1265 size_t size = 0;
1266
1267 plane = 0;
1268 while (plane < OMAPFB_PLANE_NUM) {
1269 omapfb_get_caps(fbdev, plane, &caps);
1270 size += sysfs_emit_at(buf, size, "plane#%d:\n", plane);
1271 for (i = 0; i < ARRAY_SIZE(ctrl_caps); i++) {
1272 if (ctrl_caps[i].flag & caps.ctrl)
1273 size += sysfs_emit_at(buf, size,
1274 " %s\n", ctrl_caps[i].name);
1275 }
1276 size += sysfs_emit_at(buf, size, " plane colors:\n");
1277 for (i = 0; i < ARRAY_SIZE(color_caps); i++) {
1278 if (color_caps[i].flag & caps.plane_color)
1279 size += sysfs_emit_at(buf, size,
1280 " %s\n", color_caps[i].name);
1281 }
1282 size += sysfs_emit_at(buf, size, " window colors:\n");
1283 for (i = 0; i < ARRAY_SIZE(color_caps); i++) {
1284 if (color_caps[i].flag & caps.wnd_color)
1285 size += sysfs_emit_at(buf, size,
1286 " %s\n", color_caps[i].name);
1287 }
1288
1289 plane++;
1290 }
1291 return size;
1292}
1293
1294static DEVICE_ATTR(caps_num, 0444, omapfb_show_caps_num, NULL);
1295static DEVICE_ATTR(caps_text, 0444, omapfb_show_caps_text, NULL);
1296
1297/* panel sysfs entries */
1298static ssize_t omapfb_show_panel_name(struct device *dev,
1299 struct device_attribute *attr, char *buf)
1300{
1301 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1302
1303 return sysfs_emit(buf, "%s\n", fbdev->panel->name);
1304}
1305
1306static ssize_t omapfb_show_bklight_level(struct device *dev,
1307 struct device_attribute *attr,
1308 char *buf)
1309{
1310 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1311 int r;
1312
1313 if (fbdev->panel->get_bklight_level) {
1314 r = sysfs_emit(buf, "%d\n",
1315 fbdev->panel->get_bklight_level(fbdev->panel));
1316 } else
1317 r = -ENODEV;
1318 return r;
1319}
1320
1321static ssize_t omapfb_store_bklight_level(struct device *dev,
1322 struct device_attribute *attr,
1323 const char *buf, size_t size)
1324{
1325 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1326 int r;
1327
1328 if (fbdev->panel->set_bklight_level) {
1329 unsigned int level;
1330
1331 if (sscanf(buf, "%10d", &level) == 1) {
1332 r = fbdev->panel->set_bklight_level(fbdev->panel,
1333 level);
1334 } else
1335 r = -EINVAL;
1336 } else
1337 r = -ENODEV;
1338 return r ? r : size;
1339}
1340
1341static ssize_t omapfb_show_bklight_max(struct device *dev,
1342 struct device_attribute *attr, char *buf)
1343{
1344 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1345 int r;
1346
1347 if (fbdev->panel->get_bklight_level) {
1348 r = sysfs_emit(buf, "%d\n",
1349 fbdev->panel->get_bklight_max(fbdev->panel));
1350 } else
1351 r = -ENODEV;
1352 return r;
1353}
1354
1355static struct device_attribute dev_attr_panel_name =
1356 __ATTR(name, 0444, omapfb_show_panel_name, NULL);
1357static DEVICE_ATTR(backlight_level, 0664,
1358 omapfb_show_bklight_level, omapfb_store_bklight_level);
1359static DEVICE_ATTR(backlight_max, 0444, omapfb_show_bklight_max, NULL);
1360
1361static struct attribute *panel_attrs[] = {
1362 &dev_attr_panel_name.attr,
1363 &dev_attr_backlight_level.attr,
1364 &dev_attr_backlight_max.attr,
1365 NULL,
1366};
1367
1368static const struct attribute_group panel_attr_grp = {
1369 .name = "panel",
1370 .attrs = panel_attrs,
1371};
1372
1373/* ctrl sysfs entries */
1374static ssize_t omapfb_show_ctrl_name(struct device *dev,
1375 struct device_attribute *attr, char *buf)
1376{
1377 struct omapfb_device *fbdev = dev_get_drvdata(dev);
1378
1379 return sysfs_emit(buf, "%s\n", fbdev->ctrl->name);
1380}
1381
1382static struct device_attribute dev_attr_ctrl_name =
1383 __ATTR(name, 0444, omapfb_show_ctrl_name, NULL);
1384
1385static struct attribute *ctrl_attrs[] = {
1386 &dev_attr_ctrl_name.attr,
1387 NULL,
1388};
1389
1390static const struct attribute_group ctrl_attr_grp = {
1391 .name = "ctrl",
1392 .attrs = ctrl_attrs,
1393};
1394
1395static int omapfb_register_sysfs(struct omapfb_device *fbdev)
1396{
1397 int r;
1398
1399 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_num)))
1400 goto fail0;
1401
1402 if ((r = device_create_file(fbdev->dev, &dev_attr_caps_text)))
1403 goto fail1;
1404
1405 if ((r = sysfs_create_group(&fbdev->dev->kobj, &panel_attr_grp)))
1406 goto fail2;
1407
1408 if ((r = sysfs_create_group(&fbdev->dev->kobj, &ctrl_attr_grp)))
1409 goto fail3;
1410
1411 return 0;
1412fail3:
1413 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1414fail2:
1415 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1416fail1:
1417 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1418fail0:
1419 dev_err(fbdev->dev, "unable to register sysfs interface\n");
1420 return r;
1421}
1422
1423static void omapfb_unregister_sysfs(struct omapfb_device *fbdev)
1424{
1425 sysfs_remove_group(&fbdev->dev->kobj, &ctrl_attr_grp);
1426 sysfs_remove_group(&fbdev->dev->kobj, &panel_attr_grp);
1427 device_remove_file(fbdev->dev, &dev_attr_caps_num);
1428 device_remove_file(fbdev->dev, &dev_attr_caps_text);
1429}
1430
1431/*
1432 * ---------------------------------------------------------------------------
1433 * LDM callbacks
1434 * ---------------------------------------------------------------------------
1435 */
1436/* Initialize system fb_info object and set the default video mode.
1437 * The frame buffer memory already allocated by lcddma_init
1438 */
1439static int fbinfo_init(struct omapfb_device *fbdev, struct fb_info *info)
1440{
1441 struct fb_var_screeninfo *var = &info->var;
1442 struct fb_fix_screeninfo *fix = &info->fix;
1443 int r = 0;
1444
1445 info->fbops = &omapfb_ops;
1446
1447 strscpy(fix->id, MODULE_NAME, sizeof(fix->id));
1448
1449 info->pseudo_palette = fbdev->pseudo_palette;
1450
1451 var->accel_flags = def_accel ? FB_ACCELF_TEXT : 0;
1452 var->xres = def_vxres;
1453 var->yres = def_vyres;
1454 var->xres_virtual = def_vxres;
1455 var->yres_virtual = def_vyres;
1456 var->rotate = def_rotate;
1457 var->bits_per_pixel = fbdev->panel->bpp;
1458
1459 set_fb_var(info, var);
1460 set_fb_fix(info, 1);
1461
1462 r = fb_alloc_cmap(&info->cmap, 16, 0);
1463 if (r != 0)
1464 dev_err(fbdev->dev, "unable to allocate color map memory\n");
1465
1466 return r;
1467}
1468
1469/* Release the fb_info object */
1470static void fbinfo_cleanup(struct omapfb_device *fbdev, struct fb_info *fbi)
1471{
1472 fb_dealloc_cmap(&fbi->cmap);
1473}
1474
1475static void planes_cleanup(struct omapfb_device *fbdev)
1476{
1477 int i;
1478
1479 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1480 if (fbdev->fb_info[i] == NULL)
1481 break;
1482 fbinfo_cleanup(fbdev, fbdev->fb_info[i]);
1483 framebuffer_release(fbdev->fb_info[i]);
1484 }
1485}
1486
1487static int planes_init(struct omapfb_device *fbdev)
1488{
1489 struct fb_info *fbi;
1490 int i;
1491 int r;
1492
1493 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1494 struct omapfb_plane_struct *plane;
1495 fbi = framebuffer_alloc(sizeof(struct omapfb_plane_struct),
1496 fbdev->dev);
1497 if (fbi == NULL) {
1498 planes_cleanup(fbdev);
1499 return -ENOMEM;
1500 }
1501 plane = fbi->par;
1502 plane->idx = i;
1503 plane->fbdev = fbdev;
1504 plane->info.mirror = def_mirror;
1505 fbdev->fb_info[i] = fbi;
1506
1507 if ((r = fbinfo_init(fbdev, fbi)) < 0) {
1508 framebuffer_release(fbi);
1509 planes_cleanup(fbdev);
1510 return r;
1511 }
1512 plane->info.out_width = fbi->var.xres;
1513 plane->info.out_height = fbi->var.yres;
1514 }
1515 return 0;
1516}
1517
1518/*
1519 * Free driver resources. Can be called to rollback an aborted initialization
1520 * sequence.
1521 */
1522static void omapfb_free_resources(struct omapfb_device *fbdev, int state)
1523{
1524 int i;
1525
1526 switch (state) {
1527 case OMAPFB_ACTIVE:
1528 for (i = 0; i < fbdev->mem_desc.region_cnt; i++)
1529 unregister_framebuffer(fbdev->fb_info[i]);
1530 fallthrough;
1531 case 7:
1532 omapfb_unregister_sysfs(fbdev);
1533 fallthrough;
1534 case 6:
1535 if (fbdev->panel->disable)
1536 fbdev->panel->disable(fbdev->panel);
1537 fallthrough;
1538 case 5:
1539 omapfb_set_update_mode(fbdev, OMAPFB_UPDATE_DISABLED);
1540 fallthrough;
1541 case 4:
1542 planes_cleanup(fbdev);
1543 fallthrough;
1544 case 3:
1545 ctrl_cleanup(fbdev);
1546 fallthrough;
1547 case 2:
1548 if (fbdev->panel->cleanup)
1549 fbdev->panel->cleanup(fbdev->panel);
1550 fallthrough;
1551 case 1:
1552 dev_set_drvdata(fbdev->dev, NULL);
1553 kfree(fbdev);
1554 break;
1555 case 0:
1556 /* nothing to free */
1557 break;
1558 default:
1559 BUG();
1560 }
1561}
1562
1563static int omapfb_find_ctrl(struct omapfb_device *fbdev)
1564{
1565 struct omapfb_platform_data *conf;
1566 char name[17];
1567 int i;
1568
1569 conf = dev_get_platdata(fbdev->dev);
1570
1571 fbdev->ctrl = NULL;
1572
1573 strscpy(name, conf->lcd.ctrl_name, sizeof(name));
1574
1575 if (strcmp(name, "internal") == 0) {
1576 fbdev->ctrl = fbdev->int_ctrl;
1577 return 0;
1578 }
1579
1580 for (i = 0; i < ARRAY_SIZE(ctrls); i++) {
1581 dev_dbg(fbdev->dev, "ctrl %s\n", ctrls[i]->name);
1582 if (strcmp(ctrls[i]->name, name) == 0) {
1583 fbdev->ctrl = ctrls[i];
1584 break;
1585 }
1586 }
1587
1588 if (fbdev->ctrl == NULL) {
1589 dev_dbg(fbdev->dev, "ctrl %s not supported\n", name);
1590 return -1;
1591 }
1592
1593 return 0;
1594}
1595
1596/*
1597 * Called by LDM binding to probe and attach a new device.
1598 * Initialization sequence:
1599 * 1. allocate system omapfb_device structure
1600 * 2. select controller type according to platform configuration
1601 * init LCD panel
1602 * 3. init LCD controller and LCD DMA
1603 * 4. init system fb_info structure for all planes
1604 * 5. setup video mode for first plane and enable it
1605 * 6. enable LCD panel
1606 * 7. register sysfs attributes
1607 * OMAPFB_ACTIVE: register system fb_info structure for all planes
1608 */
1609static int omapfb_do_probe(struct platform_device *pdev,
1610 struct lcd_panel *panel)
1611{
1612 struct omapfb_device *fbdev = NULL;
1613 int init_state;
1614 unsigned long phz, hhz, vhz;
1615 unsigned long vram;
1616 int i;
1617 int r = 0;
1618
1619 init_state = 0;
1620
1621 if (pdev->num_resources != 2) {
1622 dev_err(&pdev->dev, "probed for an unknown device\n");
1623 r = -ENODEV;
1624 goto cleanup;
1625 }
1626
1627 if (dev_get_platdata(&pdev->dev) == NULL) {
1628 dev_err(&pdev->dev, "missing platform data\n");
1629 r = -ENOENT;
1630 goto cleanup;
1631 }
1632
1633 fbdev = kzalloc(sizeof(*fbdev), GFP_KERNEL);
1634 if (fbdev == NULL) {
1635 dev_err(&pdev->dev,
1636 "unable to allocate memory for device info\n");
1637 r = -ENOMEM;
1638 goto cleanup;
1639 }
1640
1641 r = platform_get_irq(pdev, 0);
1642 if (r < 0)
1643 goto cleanup;
1644 fbdev->int_irq = r;
1645
1646 r = platform_get_irq(pdev, 1);
1647 if (r < 0)
1648 goto cleanup;
1649 fbdev->ext_irq = r;
1650
1651 init_state++;
1652
1653 fbdev->dev = &pdev->dev;
1654 fbdev->panel = panel;
1655 fbdev->dssdev = &omapdss_device;
1656 platform_set_drvdata(pdev, fbdev);
1657
1658 mutex_init(&fbdev->rqueue_mutex);
1659
1660 fbdev->int_ctrl = &omap1_int_ctrl;
1661#ifdef CONFIG_FB_OMAP_LCDC_EXTERNAL
1662 fbdev->ext_if = &omap1_ext_if;
1663#endif
1664 if (omapfb_find_ctrl(fbdev) < 0) {
1665 dev_err(fbdev->dev,
1666 "LCD controller not found, board not supported\n");
1667 r = -ENODEV;
1668 goto cleanup;
1669 }
1670
1671 if (fbdev->panel->init) {
1672 r = fbdev->panel->init(fbdev->panel, fbdev);
1673 if (r)
1674 goto cleanup;
1675 }
1676
1677 pr_info("omapfb: configured for panel %s\n", fbdev->panel->name);
1678
1679 def_vxres = def_vxres ? def_vxres : fbdev->panel->x_res;
1680 def_vyres = def_vyres ? def_vyres : fbdev->panel->y_res;
1681
1682 init_state++;
1683
1684 r = ctrl_init(fbdev);
1685 if (r)
1686 goto cleanup;
1687 if (fbdev->ctrl->mmap != NULL)
1688 omapfb_ops.fb_mmap = omapfb_mmap;
1689 init_state++;
1690
1691 r = planes_init(fbdev);
1692 if (r)
1693 goto cleanup;
1694 init_state++;
1695
1696#ifdef CONFIG_FB_OMAP_DMA_TUNE
1697 /* Set DMA priority for EMIFF access to highest */
1698 omap_set_dma_priority(0, OMAP_DMA_PORT_EMIFF, 15);
1699#endif
1700
1701 r = ctrl_change_mode(fbdev->fb_info[0]);
1702 if (r) {
1703 dev_err(fbdev->dev, "mode setting failed\n");
1704 goto cleanup;
1705 }
1706
1707 /* GFX plane is enabled by default */
1708 r = fbdev->ctrl->enable_plane(OMAPFB_PLANE_GFX, 1);
1709 if (r)
1710 goto cleanup;
1711
1712 omapfb_set_update_mode(fbdev, manual_update ?
1713 OMAPFB_MANUAL_UPDATE : OMAPFB_AUTO_UPDATE);
1714 init_state++;
1715
1716 if (fbdev->panel->enable) {
1717 r = fbdev->panel->enable(fbdev->panel);
1718 if (r)
1719 goto cleanup;
1720 }
1721 init_state++;
1722
1723 r = omapfb_register_sysfs(fbdev);
1724 if (r)
1725 goto cleanup;
1726 init_state++;
1727
1728 vram = 0;
1729 for (i = 0; i < fbdev->mem_desc.region_cnt; i++) {
1730 r = register_framebuffer(fbdev->fb_info[i]);
1731 if (r != 0) {
1732 dev_err(fbdev->dev,
1733 "registering framebuffer %d failed\n", i);
1734 goto cleanup;
1735 }
1736 vram += fbdev->mem_desc.region[i].size;
1737 }
1738
1739 fbdev->state = OMAPFB_ACTIVE;
1740
1741 panel = fbdev->panel;
1742 phz = panel->pixel_clock * 1000;
1743 hhz = phz * 10 / (panel->hfp + panel->x_res + panel->hbp + panel->hsw);
1744 vhz = hhz / (panel->vfp + panel->y_res + panel->vbp + panel->vsw);
1745
1746 omapfb_dev = fbdev;
1747
1748 pr_info("omapfb: Framebuffer initialized. Total vram %lu planes %d\n",
1749 vram, fbdev->mem_desc.region_cnt);
1750 pr_info("omapfb: Pixclock %lu kHz hfreq %lu.%lu kHz "
1751 "vfreq %lu.%lu Hz\n",
1752 phz / 1000, hhz / 10000, hhz % 10, vhz / 10, vhz % 10);
1753
1754 return 0;
1755
1756cleanup:
1757 omapfb_free_resources(fbdev, init_state);
1758
1759 return r;
1760}
1761
1762static int omapfb_probe(struct platform_device *pdev)
1763{
1764 int r;
1765
1766 BUG_ON(fbdev_pdev != NULL);
1767
1768 r = platform_device_register(&omapdss_device);
1769 if (r) {
1770 dev_err(&pdev->dev, "can't register omapdss device\n");
1771 return r;
1772 }
1773
1774 /* Delay actual initialization until the LCD is registered */
1775 fbdev_pdev = pdev;
1776 if (fbdev_panel != NULL)
1777 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1778 return 0;
1779}
1780
1781void omapfb_register_panel(struct lcd_panel *panel)
1782{
1783 BUG_ON(fbdev_panel != NULL);
1784
1785 fbdev_panel = panel;
1786 if (fbdev_pdev != NULL)
1787 omapfb_do_probe(fbdev_pdev, fbdev_panel);
1788}
1789EXPORT_SYMBOL_GPL(omapfb_register_panel);
1790
1791/* Called when the device is being detached from the driver */
1792static void omapfb_remove(struct platform_device *pdev)
1793{
1794 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1795 enum omapfb_state saved_state = fbdev->state;
1796
1797 /* FIXME: wait till completion of pending events */
1798
1799 fbdev->state = OMAPFB_DISABLED;
1800 omapfb_free_resources(fbdev, saved_state);
1801
1802 platform_device_unregister(&omapdss_device);
1803 fbdev->dssdev = NULL;
1804}
1805
1806/* PM suspend */
1807static int omapfb_suspend(struct platform_device *pdev, pm_message_t mesg)
1808{
1809 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1810
1811 if (fbdev != NULL)
1812 omapfb_blank(FB_BLANK_POWERDOWN, fbdev->fb_info[0]);
1813 return 0;
1814}
1815
1816/* PM resume */
1817static int omapfb_resume(struct platform_device *pdev)
1818{
1819 struct omapfb_device *fbdev = platform_get_drvdata(pdev);
1820
1821 if (fbdev != NULL)
1822 omapfb_blank(FB_BLANK_UNBLANK, fbdev->fb_info[0]);
1823 return 0;
1824}
1825
1826static struct platform_driver omapfb_driver = {
1827 .probe = omapfb_probe,
1828 .remove = omapfb_remove,
1829 .suspend = omapfb_suspend,
1830 .resume = omapfb_resume,
1831 .driver = {
1832 .name = MODULE_NAME,
1833 },
1834};
1835
1836#ifndef MODULE
1837
1838/* Process kernel command line parameters */
1839static int __init omapfb_setup(char *options)
1840{
1841 char *this_opt = NULL;
1842 int r = 0;
1843
1844 pr_debug("omapfb: options %s\n", options);
1845
1846 if (!options || !*options)
1847 return 0;
1848
1849 while (!r && (this_opt = strsep(&options, ",")) != NULL) {
1850 if (!strncmp(this_opt, "accel", 5))
1851 def_accel = 1;
1852 else if (!strncmp(this_opt, "vram:", 5)) {
1853 unsigned long long vram;
1854 char *suffix;
1855
1856 vram = memparse(this_opt + 5, &suffix);
1857 switch (suffix[0]) {
1858 case '\0':
1859 break;
1860 default:
1861 pr_debug("omapfb: invalid vram suffix %c\n",
1862 suffix[0]);
1863 r = -1;
1864 }
1865 def_vram[def_vram_cnt++] = vram;
1866 }
1867 else if (!strncmp(this_opt, "vxres:", 6))
1868 def_vxres = simple_strtoul(this_opt + 6, NULL, 0);
1869 else if (!strncmp(this_opt, "vyres:", 6))
1870 def_vyres = simple_strtoul(this_opt + 6, NULL, 0);
1871 else if (!strncmp(this_opt, "rotate:", 7))
1872 def_rotate = (simple_strtoul(this_opt + 7, NULL, 0));
1873 else if (!strncmp(this_opt, "mirror:", 7))
1874 def_mirror = (simple_strtoul(this_opt + 7, NULL, 0));
1875 else if (!strncmp(this_opt, "manual_update", 13))
1876 manual_update = 1;
1877 else {
1878 pr_debug("omapfb: invalid option\n");
1879 r = -1;
1880 }
1881 }
1882
1883 return r;
1884}
1885
1886#endif
1887
1888/* Register both the driver and the device */
1889static int __init omapfb_init(void)
1890{
1891#ifndef MODULE
1892 char *option;
1893
1894 if (fb_get_options("omapfb", &option))
1895 return -ENODEV;
1896 omapfb_setup(option);
1897#endif
1898 /* Register the driver with LDM */
1899 if (platform_driver_register(&omapfb_driver)) {
1900 pr_debug("failed to register omapfb driver\n");
1901 return -ENODEV;
1902 }
1903
1904 return 0;
1905}
1906
1907static void __exit omapfb_cleanup(void)
1908{
1909 platform_driver_unregister(&omapfb_driver);
1910}
1911
1912module_param_named(accel, def_accel, uint, 0664);
1913module_param_array_named(vram, def_vram, ulong, &def_vram_cnt, 0664);
1914module_param_named(vxres, def_vxres, long, 0664);
1915module_param_named(vyres, def_vyres, long, 0664);
1916module_param_named(rotate, def_rotate, uint, 0664);
1917module_param_named(mirror, def_mirror, uint, 0664);
1918module_param_named(manual_update, manual_update, bool, 0664);
1919
1920module_init(omapfb_init);
1921module_exit(omapfb_cleanup);
1922
1923MODULE_DESCRIPTION("TI OMAP framebuffer driver");
1924MODULE_AUTHOR("Imre Deak <imre.deak@nokia.com>");
1925MODULE_LICENSE("GPL");
Linux 6.x block layer and io_uring tree(s)