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xenbus_client.c: correct exit path for xenbus_map_ring_valloc_hvm
[linux/fpc-iii.git] / drivers / video / sh_mobile_lcdcfb.c
blob0264704a52be3d9e02b23178e489b2e567ec4c56
1 /*
2 * SuperH Mobile LCDC Framebuffer
3 *
4 * Copyright (c) 2008 Magnus Damm
5 *
6 * This file is subject to the terms and conditions of the GNU General Public
7 * License. See the file "COPYING" in the main directory of this archive
8 * for more details.
9 */
10
11 #include <linux/atomic.h>
12 #include <linux/backlight.h>
13 #include <linux/clk.h>
14 #include <linux/console.h>
15 #include <linux/ctype.h>
16 #include <linux/dma-mapping.h>
17 #include <linux/delay.h>
18 #include <linux/gpio.h>
19 #include <linux/init.h>
20 #include <linux/interrupt.h>
21 #include <linux/ioctl.h>
22 #include <linux/kernel.h>
23 #include <linux/mm.h>
24 #include <linux/module.h>
25 #include <linux/platform_device.h>
26 #include <linux/pm_runtime.h>
27 #include <linux/slab.h>
28 #include <linux/videodev2.h>
29 #include <linux/vmalloc.h>
30
31 #include <video/sh_mobile_lcdc.h>
32 #include <video/sh_mobile_meram.h>
33
34 #include "sh_mobile_lcdcfb.h"
35
36 /* ----------------------------------------------------------------------------
37 * Overlay register definitions
38 */
39
40 #define LDBCR 0xb00
41 #define LDBCR_UPC(n) (1 << ((n) + 16))
42 #define LDBCR_UPF(n) (1 << ((n) + 8))
43 #define LDBCR_UPD(n) (1 << ((n) + 0))
44 #define LDBnBSIFR(n) (0xb20 + (n) * 0x20 + 0x00)
45 #define LDBBSIFR_EN (1 << 31)
46 #define LDBBSIFR_VS (1 << 29)
47 #define LDBBSIFR_BRSEL (1 << 28)
48 #define LDBBSIFR_MX (1 << 27)
49 #define LDBBSIFR_MY (1 << 26)
50 #define LDBBSIFR_CV3 (3 << 24)
51 #define LDBBSIFR_CV2 (2 << 24)
52 #define LDBBSIFR_CV1 (1 << 24)
53 #define LDBBSIFR_CV0 (0 << 24)
54 #define LDBBSIFR_CV_MASK (3 << 24)
55 #define LDBBSIFR_LAY_MASK (0xff << 16)
56 #define LDBBSIFR_LAY_SHIFT 16
57 #define LDBBSIFR_ROP3_MASK (0xff << 16)
58 #define LDBBSIFR_ROP3_SHIFT 16
59 #define LDBBSIFR_AL_PL8 (3 << 14)
60 #define LDBBSIFR_AL_PL1 (2 << 14)
61 #define LDBBSIFR_AL_PK (1 << 14)
62 #define LDBBSIFR_AL_1 (0 << 14)
63 #define LDBBSIFR_AL_MASK (3 << 14)
64 #define LDBBSIFR_SWPL (1 << 10)
65 #define LDBBSIFR_SWPW (1 << 9)
66 #define LDBBSIFR_SWPB (1 << 8)
67 #define LDBBSIFR_RY (1 << 7)
68 #define LDBBSIFR_CHRR_420 (2 << 0)
69 #define LDBBSIFR_CHRR_422 (1 << 0)
70 #define LDBBSIFR_CHRR_444 (0 << 0)
71 #define LDBBSIFR_RPKF_ARGB32 (0x00 << 0)
72 #define LDBBSIFR_RPKF_RGB16 (0x03 << 0)
73 #define LDBBSIFR_RPKF_RGB24 (0x0b << 0)
74 #define LDBBSIFR_RPKF_MASK (0x1f << 0)
75 #define LDBnBSSZR(n) (0xb20 + (n) * 0x20 + 0x04)
76 #define LDBBSSZR_BVSS_MASK (0xfff << 16)
77 #define LDBBSSZR_BVSS_SHIFT 16
78 #define LDBBSSZR_BHSS_MASK (0xfff << 0)
79 #define LDBBSSZR_BHSS_SHIFT 0
80 #define LDBnBLOCR(n) (0xb20 + (n) * 0x20 + 0x08)
81 #define LDBBLOCR_CVLC_MASK (0xfff << 16)
82 #define LDBBLOCR_CVLC_SHIFT 16
83 #define LDBBLOCR_CHLC_MASK (0xfff << 0)
84 #define LDBBLOCR_CHLC_SHIFT 0
85 #define LDBnBSMWR(n) (0xb20 + (n) * 0x20 + 0x0c)
86 #define LDBBSMWR_BSMWA_MASK (0xffff << 16)
87 #define LDBBSMWR_BSMWA_SHIFT 16
88 #define LDBBSMWR_BSMW_MASK (0xffff << 0)
89 #define LDBBSMWR_BSMW_SHIFT 0
90 #define LDBnBSAYR(n) (0xb20 + (n) * 0x20 + 0x10)
91 #define LDBBSAYR_FG1A_MASK (0xff << 24)
92 #define LDBBSAYR_FG1A_SHIFT 24
93 #define LDBBSAYR_FG1R_MASK (0xff << 16)
94 #define LDBBSAYR_FG1R_SHIFT 16
95 #define LDBBSAYR_FG1G_MASK (0xff << 8)
96 #define LDBBSAYR_FG1G_SHIFT 8
97 #define LDBBSAYR_FG1B_MASK (0xff << 0)
98 #define LDBBSAYR_FG1B_SHIFT 0
99 #define LDBnBSACR(n) (0xb20 + (n) * 0x20 + 0x14)
100 #define LDBBSACR_FG2A_MASK (0xff << 24)
101 #define LDBBSACR_FG2A_SHIFT 24
102 #define LDBBSACR_FG2R_MASK (0xff << 16)
103 #define LDBBSACR_FG2R_SHIFT 16
104 #define LDBBSACR_FG2G_MASK (0xff << 8)
105 #define LDBBSACR_FG2G_SHIFT 8
106 #define LDBBSACR_FG2B_MASK (0xff << 0)
107 #define LDBBSACR_FG2B_SHIFT 0
108 #define LDBnBSAAR(n) (0xb20 + (n) * 0x20 + 0x18)
109 #define LDBBSAAR_AP_MASK (0xff << 24)
110 #define LDBBSAAR_AP_SHIFT 24
111 #define LDBBSAAR_R_MASK (0xff << 16)
112 #define LDBBSAAR_R_SHIFT 16
113 #define LDBBSAAR_GY_MASK (0xff << 8)
114 #define LDBBSAAR_GY_SHIFT 8
115 #define LDBBSAAR_B_MASK (0xff << 0)
116 #define LDBBSAAR_B_SHIFT 0
117 #define LDBnBPPCR(n) (0xb20 + (n) * 0x20 + 0x1c)
118 #define LDBBPPCR_AP_MASK (0xff << 24)
119 #define LDBBPPCR_AP_SHIFT 24
120 #define LDBBPPCR_R_MASK (0xff << 16)
121 #define LDBBPPCR_R_SHIFT 16
122 #define LDBBPPCR_GY_MASK (0xff << 8)
123 #define LDBBPPCR_GY_SHIFT 8
124 #define LDBBPPCR_B_MASK (0xff << 0)
125 #define LDBBPPCR_B_SHIFT 0
126 #define LDBnBBGCL(n) (0xb10 + (n) * 0x04)
127 #define LDBBBGCL_BGA_MASK (0xff << 24)
128 #define LDBBBGCL_BGA_SHIFT 24
129 #define LDBBBGCL_BGR_MASK (0xff << 16)
130 #define LDBBBGCL_BGR_SHIFT 16
131 #define LDBBBGCL_BGG_MASK (0xff << 8)
132 #define LDBBBGCL_BGG_SHIFT 8
133 #define LDBBBGCL_BGB_MASK (0xff << 0)
134 #define LDBBBGCL_BGB_SHIFT 0
135
136 #define SIDE_B_OFFSET 0x1000
137 #define MIRROR_OFFSET 0x2000
138
139 #define MAX_XRES 1920
140 #define MAX_YRES 1080
141
142 enum sh_mobile_lcdc_overlay_mode {
143 LCDC_OVERLAY_BLEND,
144 LCDC_OVERLAY_ROP3,
145 };
146
147 /*
148 * struct sh_mobile_lcdc_overlay - LCDC display overlay
149 *
150 * @channel: LCDC channel this overlay belongs to
151 * @cfg: Overlay configuration
152 * @info: Frame buffer device
153 * @index: Overlay index (0-3)
154 * @base: Overlay registers base address
155 * @enabled: True if the overlay is enabled
156 * @mode: Overlay blending mode (alpha blend or ROP3)
157 * @alpha: Global alpha blending value (0-255, for alpha blending mode)
158 * @rop3: Raster operation (for ROP3 mode)
159 * @fb_mem: Frame buffer virtual memory address
160 * @fb_size: Frame buffer size in bytes
161 * @dma_handle: Frame buffer DMA address
162 * @base_addr_y: Overlay base address (RGB or luma component)
163 * @base_addr_c: Overlay base address (chroma component)
164 * @pan_y_offset: Panning linear offset in bytes (luma component)
165 * @format: Current pixelf format
166 * @xres: Horizontal visible resolution
167 * @xres_virtual: Horizontal total resolution
168 * @yres: Vertical visible resolution
169 * @yres_virtual: Vertical total resolution
170 * @pitch: Overlay line pitch
171 * @pos_x: Horizontal overlay position
172 * @pos_y: Vertical overlay position
173 */
174 struct sh_mobile_lcdc_overlay {
175 struct sh_mobile_lcdc_chan *channel;
176
177 const struct sh_mobile_lcdc_overlay_cfg *cfg;
178 struct fb_info *info;
179
180 unsigned int index;
181 unsigned long base;
182
183 bool enabled;
184 enum sh_mobile_lcdc_overlay_mode mode;
185 unsigned int alpha;
186 unsigned int rop3;
187
188 void *fb_mem;
189 unsigned long fb_size;
190
191 dma_addr_t dma_handle;
192 unsigned long base_addr_y;
193 unsigned long base_addr_c;
194 unsigned long pan_y_offset;
195
196 const struct sh_mobile_lcdc_format_info *format;
197 unsigned int xres;
198 unsigned int xres_virtual;
199 unsigned int yres;
200 unsigned int yres_virtual;
201 unsigned int pitch;
202 int pos_x;
203 int pos_y;
204 };
205
206 struct sh_mobile_lcdc_priv {
207 void __iomem *base;
208 int irq;
209 atomic_t hw_usecnt;
210 struct device *dev;
211 struct clk *dot_clk;
212 unsigned long lddckr;
213
214 struct sh_mobile_lcdc_chan ch[2];
215 struct sh_mobile_lcdc_overlay overlays[4];
216
217 struct notifier_block notifier;
218 int started;
219 int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
220 struct sh_mobile_meram_info *meram_dev;
221 };
222
223 /* -----------------------------------------------------------------------------
224 * Registers access
225 */
226
227 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
228 [LDDCKPAT1R] = 0x400,
229 [LDDCKPAT2R] = 0x404,
230 [LDMT1R] = 0x418,
231 [LDMT2R] = 0x41c,
232 [LDMT3R] = 0x420,
233 [LDDFR] = 0x424,
234 [LDSM1R] = 0x428,
235 [LDSM2R] = 0x42c,
236 [LDSA1R] = 0x430,
237 [LDSA2R] = 0x434,
238 [LDMLSR] = 0x438,
239 [LDHCNR] = 0x448,
240 [LDHSYNR] = 0x44c,
241 [LDVLNR] = 0x450,
242 [LDVSYNR] = 0x454,
243 [LDPMR] = 0x460,
244 [LDHAJR] = 0x4a0,
245 };
246
247 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
248 [LDDCKPAT1R] = 0x408,
249 [LDDCKPAT2R] = 0x40c,
250 [LDMT1R] = 0x600,
251 [LDMT2R] = 0x604,
252 [LDMT3R] = 0x608,
253 [LDDFR] = 0x60c,
254 [LDSM1R] = 0x610,
255 [LDSM2R] = 0x614,
256 [LDSA1R] = 0x618,
257 [LDMLSR] = 0x620,
258 [LDHCNR] = 0x624,
259 [LDHSYNR] = 0x628,
260 [LDVLNR] = 0x62c,
261 [LDVSYNR] = 0x630,
262 [LDPMR] = 0x63c,
263 };
264
265 static bool banked(int reg_nr)
266 {
267 switch (reg_nr) {
268 case LDMT1R:
269 case LDMT2R:
270 case LDMT3R:
271 case LDDFR:
272 case LDSM1R:
273 case LDSA1R:
274 case LDSA2R:
275 case LDMLSR:
276 case LDHCNR:
277 case LDHSYNR:
278 case LDVLNR:
279 case LDVSYNR:
280 return true;
281 }
282 return false;
283 }
284
285 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
286 {
287 return chan->cfg->chan == LCDC_CHAN_SUBLCD;
288 }
289
290 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
291 int reg_nr, unsigned long data)
292 {
293 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
294 if (banked(reg_nr))
295 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
296 SIDE_B_OFFSET);
297 }
298
299 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
300 int reg_nr, unsigned long data)
301 {
302 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
303 MIRROR_OFFSET);
304 }
305
306 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
307 int reg_nr)
308 {
309 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
310 }
311
312 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
313 int reg, unsigned long data)
314 {
315 iowrite32(data, ovl->channel->lcdc->base + reg);
316 iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
317 }
318
319 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
320 unsigned long reg_offs, unsigned long data)
321 {
322 iowrite32(data, priv->base + reg_offs);
323 }
324
325 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
326 unsigned long reg_offs)
327 {
328 return ioread32(priv->base + reg_offs);
329 }
330
331 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
332 unsigned long reg_offs,
333 unsigned long mask, unsigned long until)
334 {
335 while ((lcdc_read(priv, reg_offs) & mask) != until)
336 cpu_relax();
337 }
338
339 /* -----------------------------------------------------------------------------
340 * Clock management
341 */
342
343 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
344 {
345 if (atomic_inc_and_test(&priv->hw_usecnt)) {
346 if (priv->dot_clk)
347 clk_enable(priv->dot_clk);
348 pm_runtime_get_sync(priv->dev);
349 if (priv->meram_dev && priv->meram_dev->pdev)
350 pm_runtime_get_sync(&priv->meram_dev->pdev->dev);
351 }
352 }
353
354 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
355 {
356 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
357 if (priv->meram_dev && priv->meram_dev->pdev)
358 pm_runtime_put_sync(&priv->meram_dev->pdev->dev);
359 pm_runtime_put(priv->dev);
360 if (priv->dot_clk)
361 clk_disable(priv->dot_clk);
362 }
363 }
364
365 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
366 int clock_source)
367 {
368 struct clk *clk;
369 char *str;
370
371 switch (clock_source) {
372 case LCDC_CLK_BUS:
373 str = "bus_clk";
374 priv->lddckr = LDDCKR_ICKSEL_BUS;
375 break;
376 case LCDC_CLK_PERIPHERAL:
377 str = "peripheral_clk";
378 priv->lddckr = LDDCKR_ICKSEL_MIPI;
379 break;
380 case LCDC_CLK_EXTERNAL:
381 str = NULL;
382 priv->lddckr = LDDCKR_ICKSEL_HDMI;
383 break;
384 default:
385 return -EINVAL;
386 }
387
388 if (str == NULL)
389 return 0;
390
391 clk = clk_get(priv->dev, str);
392 if (IS_ERR(clk)) {
393 dev_err(priv->dev, "cannot get dot clock %s\n", str);
394 return PTR_ERR(clk);
395 }
396
397 priv->dot_clk = clk;
398 return 0;
399 }
400
401 /* -----------------------------------------------------------------------------
402 * Display, panel and deferred I/O
403 */
404
405 static void lcdc_sys_write_index(void *handle, unsigned long data)
406 {
407 struct sh_mobile_lcdc_chan *ch = handle;
408
409 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
410 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
411 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
412 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
413 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
414 }
415
416 static void lcdc_sys_write_data(void *handle, unsigned long data)
417 {
418 struct sh_mobile_lcdc_chan *ch = handle;
419
420 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
421 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
422 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
423 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
424 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
425 }
426
427 static unsigned long lcdc_sys_read_data(void *handle)
428 {
429 struct sh_mobile_lcdc_chan *ch = handle;
430
431 lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
432 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
433 lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
434 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
435 udelay(1);
436 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
437
438 return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
439 }
440
441 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
442 lcdc_sys_write_index,
443 lcdc_sys_write_data,
444 lcdc_sys_read_data,
445 };
446
447 static int sh_mobile_lcdc_sginit(struct fb_info *info,
448 struct list_head *pagelist)
449 {
450 struct sh_mobile_lcdc_chan *ch = info->par;
451 unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
452 struct page *page;
453 int nr_pages = 0;
454
455 sg_init_table(ch->sglist, nr_pages_max);
456
457 list_for_each_entry(page, pagelist, lru)
458 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
459
460 return nr_pages;
461 }
462
463 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
464 struct list_head *pagelist)
465 {
466 struct sh_mobile_lcdc_chan *ch = info->par;
467 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
468
469 /* enable clocks before accessing hardware */
470 sh_mobile_lcdc_clk_on(ch->lcdc);
471
472 /*
473 * It's possible to get here without anything on the pagelist via
474 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
475 * invocation. In the former case, the acceleration routines are
476 * stepped in to when using the framebuffer console causing the
477 * workqueue to be scheduled without any dirty pages on the list.
478 *
479 * Despite this, a panel update is still needed given that the
480 * acceleration routines have their own methods for writing in
481 * that still need to be updated.
482 *
483 * The fsync() and empty pagelist case could be optimized for,
484 * but we don't bother, as any application exhibiting such
485 * behaviour is fundamentally broken anyways.
486 */
487 if (!list_empty(pagelist)) {
488 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
489
490 /* trigger panel update */
491 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
492 if (panel->start_transfer)
493 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
494 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
495 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
496 DMA_TO_DEVICE);
497 } else {
498 if (panel->start_transfer)
499 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
500 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
501 }
502 }
503
504 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
505 {
506 struct fb_deferred_io *fbdefio = info->fbdefio;
507
508 if (fbdefio)
509 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
510 }
511
512 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
513 {
514 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
515
516 if (ch->tx_dev) {
517 int ret;
518
519 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
520 if (ret < 0)
521 return;
522
523 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
524 ch->info->state = FBINFO_STATE_SUSPENDED;
525 }
526
527 /* HDMI must be enabled before LCDC configuration */
528 if (panel->display_on)
529 panel->display_on();
530 }
531
532 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
533 {
534 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
535
536 if (panel->display_off)
537 panel->display_off();
538
539 if (ch->tx_dev)
540 ch->tx_dev->ops->display_off(ch->tx_dev);
541 }
542
543 static bool
544 sh_mobile_lcdc_must_reconfigure(struct sh_mobile_lcdc_chan *ch,
545 const struct fb_videomode *new_mode)
546 {
547 dev_dbg(ch->info->dev, "Old %ux%u, new %ux%u\n",
548 ch->display.mode.xres, ch->display.mode.yres,
549 new_mode->xres, new_mode->yres);
550
551 /* It can be a different monitor with an equal video-mode */
552 if (fb_mode_is_equal(&ch->display.mode, new_mode))
553 return false;
554
555 dev_dbg(ch->info->dev, "Switching %u -> %u lines\n",
556 ch->display.mode.yres, new_mode->yres);
557 ch->display.mode = *new_mode;
558
559 return true;
560 }
561
562 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
563 struct fb_info *info);
564
565 static int sh_mobile_lcdc_display_notify(struct sh_mobile_lcdc_chan *ch,
566 enum sh_mobile_lcdc_entity_event event,
567 const struct fb_videomode *mode,
568 const struct fb_monspecs *monspec)
569 {
570 struct fb_info *info = ch->info;
571 struct fb_var_screeninfo var;
572 int ret = 0;
573
574 switch (event) {
575 case SH_MOBILE_LCDC_EVENT_DISPLAY_CONNECT:
576 /* HDMI plug in */
577 if (lock_fb_info(info)) {
578 console_lock();
579
580 ch->display.width = monspec->max_x * 10;
581 ch->display.height = monspec->max_y * 10;
582
583 if (!sh_mobile_lcdc_must_reconfigure(ch, mode) &&
584 info->state == FBINFO_STATE_RUNNING) {
585 /* First activation with the default monitor.
586 * Just turn on, if we run a resume here, the
587 * logo disappears.
588 */
589 info->var.width = ch->display.width;
590 info->var.height = ch->display.height;
591 sh_mobile_lcdc_display_on(ch);
592 } else {
593 /* New monitor or have to wake up */
594 fb_set_suspend(info, 0);
595 }
596
597 console_unlock();
598 unlock_fb_info(info);
599 }
600 break;
601
602 case SH_MOBILE_LCDC_EVENT_DISPLAY_DISCONNECT:
603 /* HDMI disconnect */
604 if (lock_fb_info(info)) {
605 console_lock();
606 fb_set_suspend(info, 1);
607 console_unlock();
608 unlock_fb_info(info);
609 }
610 break;
611
612 case SH_MOBILE_LCDC_EVENT_DISPLAY_MODE:
613 /* Validate a proposed new mode */
614 fb_videomode_to_var(&var, mode);
615 var.bits_per_pixel = info->var.bits_per_pixel;
616 var.grayscale = info->var.grayscale;
617 ret = sh_mobile_lcdc_check_var(&var, info);
618 break;
619 }
620
621 return ret;
622 }
623
624 /* -----------------------------------------------------------------------------
625 * Format helpers
626 */
627
628 struct sh_mobile_lcdc_format_info {
629 u32 fourcc;
630 unsigned int bpp;
631 bool yuv;
632 u32 lddfr;
633 };
634
635 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
636 {
637 .fourcc = V4L2_PIX_FMT_RGB565,
638 .bpp = 16,
639 .yuv = false,
640 .lddfr = LDDFR_PKF_RGB16,
641 }, {
642 .fourcc = V4L2_PIX_FMT_BGR24,
643 .bpp = 24,
644 .yuv = false,
645 .lddfr = LDDFR_PKF_RGB24,
646 }, {
647 .fourcc = V4L2_PIX_FMT_BGR32,
648 .bpp = 32,
649 .yuv = false,
650 .lddfr = LDDFR_PKF_ARGB32,
651 }, {
652 .fourcc = V4L2_PIX_FMT_NV12,
653 .bpp = 12,
654 .yuv = true,
655 .lddfr = LDDFR_CC | LDDFR_YF_420,
656 }, {
657 .fourcc = V4L2_PIX_FMT_NV21,
658 .bpp = 12,
659 .yuv = true,
660 .lddfr = LDDFR_CC | LDDFR_YF_420,
661 }, {
662 .fourcc = V4L2_PIX_FMT_NV16,
663 .bpp = 16,
664 .yuv = true,
665 .lddfr = LDDFR_CC | LDDFR_YF_422,
666 }, {
667 .fourcc = V4L2_PIX_FMT_NV61,
668 .bpp = 16,
669 .yuv = true,
670 .lddfr = LDDFR_CC | LDDFR_YF_422,
671 }, {
672 .fourcc = V4L2_PIX_FMT_NV24,
673 .bpp = 24,
674 .yuv = true,
675 .lddfr = LDDFR_CC | LDDFR_YF_444,
676 }, {
677 .fourcc = V4L2_PIX_FMT_NV42,
678 .bpp = 24,
679 .yuv = true,
680 .lddfr = LDDFR_CC | LDDFR_YF_444,
681 },
682 };
683
684 static const struct sh_mobile_lcdc_format_info *
685 sh_mobile_format_info(u32 fourcc)
686 {
687 unsigned int i;
688
689 for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
690 if (sh_mobile_format_infos[i].fourcc == fourcc)
691 return &sh_mobile_format_infos[i];
692 }
693
694 return NULL;
695 }
696
697 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
698 {
699 if (var->grayscale > 1)
700 return var->grayscale;
701
702 switch (var->bits_per_pixel) {
703 case 16:
704 return V4L2_PIX_FMT_RGB565;
705 case 24:
706 return V4L2_PIX_FMT_BGR24;
707 case 32:
708 return V4L2_PIX_FMT_BGR32;
709 default:
710 return 0;
711 }
712 }
713
714 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
715 {
716 return var->grayscale > 1;
717 }
718
719 /* -----------------------------------------------------------------------------
720 * Start, stop and IRQ
721 */
722
723 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
724 {
725 struct sh_mobile_lcdc_priv *priv = data;
726 struct sh_mobile_lcdc_chan *ch;
727 unsigned long ldintr;
728 int is_sub;
729 int k;
730
731 /* Acknowledge interrupts and disable further VSYNC End IRQs. */
732 ldintr = lcdc_read(priv, _LDINTR);
733 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
734
735 /* figure out if this interrupt is for main or sub lcd */
736 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
737
738 /* wake up channel and disable clocks */
739 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
740 ch = &priv->ch[k];
741
742 if (!ch->enabled)
743 continue;
744
745 /* Frame End */
746 if (ldintr & LDINTR_FS) {
747 if (is_sub == lcdc_chan_is_sublcd(ch)) {
748 ch->frame_end = 1;
749 wake_up(&ch->frame_end_wait);
750
751 sh_mobile_lcdc_clk_off(priv);
752 }
753 }
754
755 /* VSYNC End */
756 if (ldintr & LDINTR_VES)
757 complete(&ch->vsync_completion);
758 }
759
760 return IRQ_HANDLED;
761 }
762
763 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
764 {
765 unsigned long ldintr;
766 int ret;
767
768 /* Enable VSync End interrupt and be careful not to acknowledge any
769 * pending interrupt.
770 */
771 ldintr = lcdc_read(ch->lcdc, _LDINTR);
772 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
773 lcdc_write(ch->lcdc, _LDINTR, ldintr);
774
775 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
776 msecs_to_jiffies(100));
777 if (!ret)
778 return -ETIMEDOUT;
779
780 return 0;
781 }
782
783 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
784 int start)
785 {
786 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
787 int k;
788
789 /* start or stop the lcdc */
790 if (start)
791 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
792 else
793 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
794
795 /* wait until power is applied/stopped on all channels */
796 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
797 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
798 while (1) {
799 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
800 & LDPMR_LPS;
801 if (start && tmp == LDPMR_LPS)
802 break;
803 if (!start && tmp == 0)
804 break;
805 cpu_relax();
806 }
807
808 if (!start)
809 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
810 }
811
812 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
813 {
814 const struct fb_var_screeninfo *var = &ch->info->var;
815 const struct fb_videomode *mode = &ch->display.mode;
816 unsigned long h_total, hsync_pos, display_h_total;
817 u32 tmp;
818
819 tmp = ch->ldmt1r_value;
820 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
821 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
822 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
823 tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
824 tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
825 tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
826 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
827 lcdc_write_chan(ch, LDMT1R, tmp);
828
829 /* setup SYS bus */
830 lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
831 lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
832
833 /* horizontal configuration */
834 h_total = mode->xres + mode->hsync_len + mode->left_margin
835 + mode->right_margin;
836 tmp = h_total / 8; /* HTCN */
837 tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
838 lcdc_write_chan(ch, LDHCNR, tmp);
839
840 hsync_pos = mode->xres + mode->right_margin;
841 tmp = hsync_pos / 8; /* HSYNP */
842 tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
843 lcdc_write_chan(ch, LDHSYNR, tmp);
844
845 /* vertical configuration */
846 tmp = mode->yres + mode->vsync_len + mode->upper_margin
847 + mode->lower_margin; /* VTLN */
848 tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
849 lcdc_write_chan(ch, LDVLNR, tmp);
850
851 tmp = mode->yres + mode->lower_margin; /* VSYNP */
852 tmp |= mode->vsync_len << 16; /* VSYNW */
853 lcdc_write_chan(ch, LDVSYNR, tmp);
854
855 /* Adjust horizontal synchronisation for HDMI */
856 display_h_total = mode->xres + mode->hsync_len + mode->left_margin
857 + mode->right_margin;
858 tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
859 | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
860 lcdc_write_chan(ch, LDHAJR, tmp);
861 lcdc_write_chan_mirror(ch, LDHAJR, tmp);
862 }
863
864 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
865 {
866 u32 format = 0;
867
868 if (!ovl->enabled) {
869 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
870 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
871 lcdc_write(ovl->channel->lcdc, LDBCR,
872 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
873 return;
874 }
875
876 ovl->base_addr_y = ovl->dma_handle;
877 ovl->base_addr_c = ovl->dma_handle
878 + ovl->xres_virtual * ovl->yres_virtual;
879
880 switch (ovl->mode) {
881 case LCDC_OVERLAY_BLEND:
882 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
883 break;
884
885 case LCDC_OVERLAY_ROP3:
886 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
887 | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
888 break;
889 }
890
891 switch (ovl->format->fourcc) {
892 case V4L2_PIX_FMT_RGB565:
893 case V4L2_PIX_FMT_NV21:
894 case V4L2_PIX_FMT_NV61:
895 case V4L2_PIX_FMT_NV42:
896 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
897 break;
898 case V4L2_PIX_FMT_BGR24:
899 case V4L2_PIX_FMT_NV12:
900 case V4L2_PIX_FMT_NV16:
901 case V4L2_PIX_FMT_NV24:
902 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
903 break;
904 case V4L2_PIX_FMT_BGR32:
905 default:
906 format |= LDBBSIFR_SWPL;
907 break;
908 }
909
910 switch (ovl->format->fourcc) {
911 case V4L2_PIX_FMT_RGB565:
912 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
913 break;
914 case V4L2_PIX_FMT_BGR24:
915 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
916 break;
917 case V4L2_PIX_FMT_BGR32:
918 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
919 break;
920 case V4L2_PIX_FMT_NV12:
921 case V4L2_PIX_FMT_NV21:
922 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
923 break;
924 case V4L2_PIX_FMT_NV16:
925 case V4L2_PIX_FMT_NV61:
926 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
927 break;
928 case V4L2_PIX_FMT_NV24:
929 case V4L2_PIX_FMT_NV42:
930 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
931 break;
932 }
933
934 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
935
936 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
937
938 lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
939 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
940 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
941 lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
942 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
943 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
944 lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
945 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
946
947 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
948 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
949
950 lcdc_write(ovl->channel->lcdc, LDBCR,
951 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
952 }
953
954 /*
955 * __sh_mobile_lcdc_start - Configure and start the LCDC
956 * @priv: LCDC device
957 *
958 * Configure all enabled channels and start the LCDC device. All external
959 * devices (clocks, MERAM, panels, ...) are not touched by this function.
960 */
961 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
962 {
963 struct sh_mobile_lcdc_chan *ch;
964 unsigned long tmp;
965 int k, m;
966
967 /* Enable LCDC channels. Read data from external memory, avoid using the
968 * BEU for now.
969 */
970 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
971
972 /* Stop the LCDC first and disable all interrupts. */
973 sh_mobile_lcdc_start_stop(priv, 0);
974 lcdc_write(priv, _LDINTR, 0);
975
976 /* Configure power supply, dot clocks and start them. */
977 tmp = priv->lddckr;
978 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
979 ch = &priv->ch[k];
980 if (!ch->enabled)
981 continue;
982
983 /* Power supply */
984 lcdc_write_chan(ch, LDPMR, 0);
985
986 m = ch->cfg->clock_divider;
987 if (!m)
988 continue;
989
990 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
991 * denominator.
992 */
993 lcdc_write_chan(ch, LDDCKPAT1R, 0);
994 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
995
996 if (m == 1)
997 m = LDDCKR_MOSEL;
998 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
999 }
1000
1001 lcdc_write(priv, _LDDCKR, tmp);
1002 lcdc_write(priv, _LDDCKSTPR, 0);
1003 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
1004
1005 /* Setup geometry, format, frame buffer memory and operation mode. */
1006 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1007 ch = &priv->ch[k];
1008 if (!ch->enabled)
1009 continue;
1010
1011 sh_mobile_lcdc_geometry(ch);
1012
1013 tmp = ch->format->lddfr;
1014
1015 if (ch->format->yuv) {
1016 switch (ch->colorspace) {
1017 case V4L2_COLORSPACE_REC709:
1018 tmp |= LDDFR_CF1;
1019 break;
1020 case V4L2_COLORSPACE_JPEG:
1021 tmp |= LDDFR_CF0;
1022 break;
1023 }
1024 }
1025
1026 lcdc_write_chan(ch, LDDFR, tmp);
1027 lcdc_write_chan(ch, LDMLSR, ch->line_size);
1028 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
1029 if (ch->format->yuv)
1030 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
1031
1032 /* When using deferred I/O mode, configure the LCDC for one-shot
1033 * operation and enable the frame end interrupt. Otherwise use
1034 * continuous read mode.
1035 */
1036 if (ch->ldmt1r_value & LDMT1R_IFM &&
1037 ch->cfg->sys_bus_cfg.deferred_io_msec) {
1038 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
1039 lcdc_write(priv, _LDINTR, LDINTR_FE);
1040 } else {
1041 lcdc_write_chan(ch, LDSM1R, 0);
1042 }
1043 }
1044
1045 /* Word and long word swap. */
1046 switch (priv->ch[0].format->fourcc) {
1047 case V4L2_PIX_FMT_RGB565:
1048 case V4L2_PIX_FMT_NV21:
1049 case V4L2_PIX_FMT_NV61:
1050 case V4L2_PIX_FMT_NV42:
1051 tmp = LDDDSR_LS | LDDDSR_WS;
1052 break;
1053 case V4L2_PIX_FMT_BGR24:
1054 case V4L2_PIX_FMT_NV12:
1055 case V4L2_PIX_FMT_NV16:
1056 case V4L2_PIX_FMT_NV24:
1057 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
1058 break;
1059 case V4L2_PIX_FMT_BGR32:
1060 default:
1061 tmp = LDDDSR_LS;
1062 break;
1063 }
1064 lcdc_write(priv, _LDDDSR, tmp);
1065
1066 /* Enable the display output. */
1067 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
1068 sh_mobile_lcdc_start_stop(priv, 1);
1069 priv->started = 1;
1070 }
1071
1072 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
1073 {
1074 struct sh_mobile_meram_info *mdev = priv->meram_dev;
1075 struct sh_mobile_lcdc_chan *ch;
1076 unsigned long tmp;
1077 int ret;
1078 int k;
1079
1080 /* enable clocks before accessing the hardware */
1081 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1082 if (priv->ch[k].enabled)
1083 sh_mobile_lcdc_clk_on(priv);
1084 }
1085
1086 /* reset */
1087 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1088 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1089
1090 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1091 const struct sh_mobile_lcdc_panel_cfg *panel;
1092
1093 ch = &priv->ch[k];
1094 if (!ch->enabled)
1095 continue;
1096
1097 panel = &ch->cfg->panel_cfg;
1098 if (panel->setup_sys) {
1099 ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1100 if (ret)
1101 return ret;
1102 }
1103 }
1104
1105 /* Compute frame buffer base address and pitch for each channel. */
1106 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1107 int pixelformat;
1108 void *cache;
1109
1110 ch = &priv->ch[k];
1111 if (!ch->enabled)
1112 continue;
1113
1114 ch->base_addr_y = ch->dma_handle;
1115 ch->base_addr_c = ch->dma_handle
1116 + ch->xres_virtual * ch->yres_virtual;
1117 ch->line_size = ch->pitch;
1118
1119 /* Enable MERAM if possible. */
1120 if (mdev == NULL || ch->cfg->meram_cfg == NULL)
1121 continue;
1122
1123 /* Free the allocated MERAM cache. */
1124 if (ch->cache) {
1125 sh_mobile_meram_cache_free(mdev, ch->cache);
1126 ch->cache = NULL;
1127 }
1128
1129 switch (ch->format->fourcc) {
1130 case V4L2_PIX_FMT_NV12:
1131 case V4L2_PIX_FMT_NV21:
1132 case V4L2_PIX_FMT_NV16:
1133 case V4L2_PIX_FMT_NV61:
1134 pixelformat = SH_MOBILE_MERAM_PF_NV;
1135 break;
1136 case V4L2_PIX_FMT_NV24:
1137 case V4L2_PIX_FMT_NV42:
1138 pixelformat = SH_MOBILE_MERAM_PF_NV24;
1139 break;
1140 case V4L2_PIX_FMT_RGB565:
1141 case V4L2_PIX_FMT_BGR24:
1142 case V4L2_PIX_FMT_BGR32:
1143 default:
1144 pixelformat = SH_MOBILE_MERAM_PF_RGB;
1145 break;
1146 }
1147
1148 cache = sh_mobile_meram_cache_alloc(mdev, ch->cfg->meram_cfg,
1149 ch->pitch, ch->yres, pixelformat,
1150 &ch->line_size);
1151 if (!IS_ERR(cache)) {
1152 sh_mobile_meram_cache_update(mdev, cache,
1153 ch->base_addr_y, ch->base_addr_c,
1154 &ch->base_addr_y, &ch->base_addr_c);
1155 ch->cache = cache;
1156 }
1157 }
1158
1159 for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1160 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1161 sh_mobile_lcdc_overlay_setup(ovl);
1162 }
1163
1164 /* Start the LCDC. */
1165 __sh_mobile_lcdc_start(priv);
1166
1167 /* Setup deferred I/O, tell the board code to enable the panels, and
1168 * turn backlight on.
1169 */
1170 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1171 ch = &priv->ch[k];
1172 if (!ch->enabled)
1173 continue;
1174
1175 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1176 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1177 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1178 ch->defio.delay = msecs_to_jiffies(tmp);
1179 ch->info->fbdefio = &ch->defio;
1180 fb_deferred_io_init(ch->info);
1181 }
1182
1183 sh_mobile_lcdc_display_on(ch);
1184
1185 if (ch->bl) {
1186 ch->bl->props.power = FB_BLANK_UNBLANK;
1187 backlight_update_status(ch->bl);
1188 }
1189 }
1190
1191 return 0;
1192 }
1193
1194 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1195 {
1196 struct sh_mobile_lcdc_chan *ch;
1197 int k;
1198
1199 /* clean up deferred io and ask board code to disable panel */
1200 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1201 ch = &priv->ch[k];
1202 if (!ch->enabled)
1203 continue;
1204
1205 /* deferred io mode:
1206 * flush frame, and wait for frame end interrupt
1207 * clean up deferred io and enable clock
1208 */
1209 if (ch->info && ch->info->fbdefio) {
1210 ch->frame_end = 0;
1211 schedule_delayed_work(&ch->info->deferred_work, 0);
1212 wait_event(ch->frame_end_wait, ch->frame_end);
1213 fb_deferred_io_cleanup(ch->info);
1214 ch->info->fbdefio = NULL;
1215 sh_mobile_lcdc_clk_on(priv);
1216 }
1217
1218 if (ch->bl) {
1219 ch->bl->props.power = FB_BLANK_POWERDOWN;
1220 backlight_update_status(ch->bl);
1221 }
1222
1223 sh_mobile_lcdc_display_off(ch);
1224
1225 /* Free the MERAM cache. */
1226 if (ch->cache) {
1227 sh_mobile_meram_cache_free(priv->meram_dev, ch->cache);
1228 ch->cache = 0;
1229 }
1230
1231 }
1232
1233 /* stop the lcdc */
1234 if (priv->started) {
1235 sh_mobile_lcdc_start_stop(priv, 0);
1236 priv->started = 0;
1237 }
1238
1239 /* stop clocks */
1240 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1241 if (priv->ch[k].enabled)
1242 sh_mobile_lcdc_clk_off(priv);
1243 }
1244
1245 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1246 struct fb_info *info)
1247 {
1248 if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1249 return -EINVAL;
1250
1251 /* Make sure the virtual resolution is at least as big as the visible
1252 * resolution.
1253 */
1254 if (var->xres_virtual < var->xres)
1255 var->xres_virtual = var->xres;
1256 if (var->yres_virtual < var->yres)
1257 var->yres_virtual = var->yres;
1258
1259 if (sh_mobile_format_is_fourcc(var)) {
1260 const struct sh_mobile_lcdc_format_info *format;
1261
1262 format = sh_mobile_format_info(var->grayscale);
1263 if (format == NULL)
1264 return -EINVAL;
1265 var->bits_per_pixel = format->bpp;
1266
1267 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1268 * respectively.
1269 */
1270 if (!format->yuv)
1271 var->colorspace = V4L2_COLORSPACE_SRGB;
1272 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1273 var->colorspace = V4L2_COLORSPACE_JPEG;
1274 } else {
1275 if (var->bits_per_pixel <= 16) { /* RGB 565 */
1276 var->bits_per_pixel = 16;
1277 var->red.offset = 11;
1278 var->red.length = 5;
1279 var->green.offset = 5;
1280 var->green.length = 6;
1281 var->blue.offset = 0;
1282 var->blue.length = 5;
1283 var->transp.offset = 0;
1284 var->transp.length = 0;
1285 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */
1286 var->bits_per_pixel = 24;
1287 var->red.offset = 16;
1288 var->red.length = 8;
1289 var->green.offset = 8;
1290 var->green.length = 8;
1291 var->blue.offset = 0;
1292 var->blue.length = 8;
1293 var->transp.offset = 0;
1294 var->transp.length = 0;
1295 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
1296 var->bits_per_pixel = 32;
1297 var->red.offset = 16;
1298 var->red.length = 8;
1299 var->green.offset = 8;
1300 var->green.length = 8;
1301 var->blue.offset = 0;
1302 var->blue.length = 8;
1303 var->transp.offset = 24;
1304 var->transp.length = 8;
1305 } else
1306 return -EINVAL;
1307
1308 var->red.msb_right = 0;
1309 var->green.msb_right = 0;
1310 var->blue.msb_right = 0;
1311 var->transp.msb_right = 0;
1312 }
1313
1314 /* Make sure we don't exceed our allocated memory. */
1315 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1316 info->fix.smem_len)
1317 return -EINVAL;
1318
1319 return 0;
1320 }
1321
1322 /* -----------------------------------------------------------------------------
1323 * Frame buffer operations - Overlays
1324 */
1325
1326 static ssize_t
1327 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1328 {
1329 struct fb_info *info = dev_get_drvdata(dev);
1330 struct sh_mobile_lcdc_overlay *ovl = info->par;
1331
1332 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1333 }
1334
1335 static ssize_t
1336 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1337 const char *buf, size_t count)
1338 {
1339 struct fb_info *info = dev_get_drvdata(dev);
1340 struct sh_mobile_lcdc_overlay *ovl = info->par;
1341 unsigned int alpha;
1342 char *endp;
1343
1344 alpha = simple_strtoul(buf, &endp, 10);
1345 if (isspace(*endp))
1346 endp++;
1347
1348 if (endp - buf != count)
1349 return -EINVAL;
1350
1351 if (alpha > 255)
1352 return -EINVAL;
1353
1354 if (ovl->alpha != alpha) {
1355 ovl->alpha = alpha;
1356
1357 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1358 sh_mobile_lcdc_overlay_setup(ovl);
1359 }
1360
1361 return count;
1362 }
1363
1364 static ssize_t
1365 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1366 {
1367 struct fb_info *info = dev_get_drvdata(dev);
1368 struct sh_mobile_lcdc_overlay *ovl = info->par;
1369
1370 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1371 }
1372
1373 static ssize_t
1374 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1375 const char *buf, size_t count)
1376 {
1377 struct fb_info *info = dev_get_drvdata(dev);
1378 struct sh_mobile_lcdc_overlay *ovl = info->par;
1379 unsigned int mode;
1380 char *endp;
1381
1382 mode = simple_strtoul(buf, &endp, 10);
1383 if (isspace(*endp))
1384 endp++;
1385
1386 if (endp - buf != count)
1387 return -EINVAL;
1388
1389 if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1390 return -EINVAL;
1391
1392 if (ovl->mode != mode) {
1393 ovl->mode = mode;
1394
1395 if (ovl->enabled)
1396 sh_mobile_lcdc_overlay_setup(ovl);
1397 }
1398
1399 return count;
1400 }
1401
1402 static ssize_t
1403 overlay_position_show(struct device *dev, struct device_attribute *attr,
1404 char *buf)
1405 {
1406 struct fb_info *info = dev_get_drvdata(dev);
1407 struct sh_mobile_lcdc_overlay *ovl = info->par;
1408
1409 return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1410 }
1411
1412 static ssize_t
1413 overlay_position_store(struct device *dev, struct device_attribute *attr,
1414 const char *buf, size_t count)
1415 {
1416 struct fb_info *info = dev_get_drvdata(dev);
1417 struct sh_mobile_lcdc_overlay *ovl = info->par;
1418 char *endp;
1419 int pos_x;
1420 int pos_y;
1421
1422 pos_x = simple_strtol(buf, &endp, 10);
1423 if (*endp != ',')
1424 return -EINVAL;
1425
1426 pos_y = simple_strtol(endp + 1, &endp, 10);
1427 if (isspace(*endp))
1428 endp++;
1429
1430 if (endp - buf != count)
1431 return -EINVAL;
1432
1433 if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1434 ovl->pos_x = pos_x;
1435 ovl->pos_y = pos_y;
1436
1437 if (ovl->enabled)
1438 sh_mobile_lcdc_overlay_setup(ovl);
1439 }
1440
1441 return count;
1442 }
1443
1444 static ssize_t
1445 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1446 {
1447 struct fb_info *info = dev_get_drvdata(dev);
1448 struct sh_mobile_lcdc_overlay *ovl = info->par;
1449
1450 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1451 }
1452
1453 static ssize_t
1454 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1455 const char *buf, size_t count)
1456 {
1457 struct fb_info *info = dev_get_drvdata(dev);
1458 struct sh_mobile_lcdc_overlay *ovl = info->par;
1459 unsigned int rop3;
1460 char *endp;
1461
1462 rop3 = !!simple_strtoul(buf, &endp, 10);
1463 if (isspace(*endp))
1464 endp++;
1465
1466 if (endp - buf != count)
1467 return -EINVAL;
1468
1469 if (rop3 > 255)
1470 return -EINVAL;
1471
1472 if (ovl->rop3 != rop3) {
1473 ovl->rop3 = rop3;
1474
1475 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1476 sh_mobile_lcdc_overlay_setup(ovl);
1477 }
1478
1479 return count;
1480 }
1481
1482 static const struct device_attribute overlay_sysfs_attrs[] = {
1483 __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1484 overlay_alpha_show, overlay_alpha_store),
1485 __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1486 overlay_mode_show, overlay_mode_store),
1487 __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1488 overlay_position_show, overlay_position_store),
1489 __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1490 overlay_rop3_show, overlay_rop3_store),
1491 };
1492
1493 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix = {
1494 .id = "SH Mobile LCDC",
1495 .type = FB_TYPE_PACKED_PIXELS,
1496 .visual = FB_VISUAL_TRUECOLOR,
1497 .accel = FB_ACCEL_NONE,
1498 .xpanstep = 1,
1499 .ypanstep = 1,
1500 .ywrapstep = 0,
1501 .capabilities = FB_CAP_FOURCC,
1502 };
1503
1504 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1505 struct fb_info *info)
1506 {
1507 struct sh_mobile_lcdc_overlay *ovl = info->par;
1508 unsigned long base_addr_y;
1509 unsigned long base_addr_c;
1510 unsigned long y_offset;
1511 unsigned long c_offset;
1512
1513 if (!ovl->format->yuv) {
1514 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1515 * ovl->format->bpp / 8;
1516 c_offset = 0;
1517 } else {
1518 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1519 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1520
1521 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1522 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1523 + var->xoffset * 2 / xsub;
1524 }
1525
1526 /* If the Y offset hasn't changed, the C offset hasn't either. There's
1527 * nothing to do in that case.
1528 */
1529 if (y_offset == ovl->pan_y_offset)
1530 return 0;
1531
1532 /* Set the source address for the next refresh */
1533 base_addr_y = ovl->dma_handle + y_offset;
1534 base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1535 + c_offset;
1536
1537 ovl->base_addr_y = base_addr_y;
1538 ovl->base_addr_c = base_addr_c;
1539 ovl->pan_y_offset = y_offset;
1540
1541 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1542
1543 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1544 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1545
1546 lcdc_write(ovl->channel->lcdc, LDBCR,
1547 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1548
1549 return 0;
1550 }
1551
1552 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1553 unsigned long arg)
1554 {
1555 struct sh_mobile_lcdc_overlay *ovl = info->par;
1556
1557 switch (cmd) {
1558 case FBIO_WAITFORVSYNC:
1559 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1560
1561 default:
1562 return -ENOIOCTLCMD;
1563 }
1564 }
1565
1566 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1567 struct fb_info *info)
1568 {
1569 return __sh_mobile_lcdc_check_var(var, info);
1570 }
1571
1572 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1573 {
1574 struct sh_mobile_lcdc_overlay *ovl = info->par;
1575
1576 ovl->format =
1577 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1578
1579 ovl->xres = info->var.xres;
1580 ovl->xres_virtual = info->var.xres_virtual;
1581 ovl->yres = info->var.yres;
1582 ovl->yres_virtual = info->var.yres_virtual;
1583
1584 if (ovl->format->yuv)
1585 ovl->pitch = info->var.xres_virtual;
1586 else
1587 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1588
1589 sh_mobile_lcdc_overlay_setup(ovl);
1590
1591 info->fix.line_length = ovl->pitch;
1592
1593 if (sh_mobile_format_is_fourcc(&info->var)) {
1594 info->fix.type = FB_TYPE_FOURCC;
1595 info->fix.visual = FB_VISUAL_FOURCC;
1596 } else {
1597 info->fix.type = FB_TYPE_PACKED_PIXELS;
1598 info->fix.visual = FB_VISUAL_TRUECOLOR;
1599 }
1600
1601 return 0;
1602 }
1603
1604 /* Overlay blanking. Disable the overlay when blanked. */
1605 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1606 {
1607 struct sh_mobile_lcdc_overlay *ovl = info->par;
1608
1609 ovl->enabled = !blank;
1610 sh_mobile_lcdc_overlay_setup(ovl);
1611
1612 /* Prevent the backlight from receiving a blanking event by returning
1613 * a non-zero value.
1614 */
1615 return 1;
1616 }
1617
1618 static int
1619 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1620 {
1621 struct sh_mobile_lcdc_overlay *ovl = info->par;
1622
1623 return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1624 ovl->dma_handle, ovl->fb_size);
1625 }
1626
1627 static struct fb_ops sh_mobile_lcdc_overlay_ops = {
1628 .owner = THIS_MODULE,
1629 .fb_read = fb_sys_read,
1630 .fb_write = fb_sys_write,
1631 .fb_fillrect = sys_fillrect,
1632 .fb_copyarea = sys_copyarea,
1633 .fb_imageblit = sys_imageblit,
1634 .fb_blank = sh_mobile_lcdc_overlay_blank,
1635 .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1636 .fb_ioctl = sh_mobile_lcdc_overlay_ioctl,
1637 .fb_check_var = sh_mobile_lcdc_overlay_check_var,
1638 .fb_set_par = sh_mobile_lcdc_overlay_set_par,
1639 .fb_mmap = sh_mobile_lcdc_overlay_mmap,
1640 };
1641
1642 static void
1643 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1644 {
1645 struct fb_info *info = ovl->info;
1646
1647 if (info == NULL || info->dev == NULL)
1648 return;
1649
1650 unregister_framebuffer(ovl->info);
1651 }
1652
1653 static int
1654 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1655 {
1656 struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1657 struct fb_info *info = ovl->info;
1658 unsigned int i;
1659 int ret;
1660
1661 if (info == NULL)
1662 return 0;
1663
1664 ret = register_framebuffer(info);
1665 if (ret < 0)
1666 return ret;
1667
1668 dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1669 dev_name(lcdc->dev), ovl->index, info->var.xres,
1670 info->var.yres, info->var.bits_per_pixel);
1671
1672 for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1673 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1674 if (ret < 0)
1675 return ret;
1676 }
1677
1678 return 0;
1679 }
1680
1681 static void
1682 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1683 {
1684 struct fb_info *info = ovl->info;
1685
1686 if (info == NULL || info->device == NULL)
1687 return;
1688
1689 framebuffer_release(info);
1690 }
1691
1692 static int
1693 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1694 {
1695 struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1696 struct fb_var_screeninfo *var;
1697 struct fb_info *info;
1698
1699 /* Allocate and initialize the frame buffer device. */
1700 info = framebuffer_alloc(0, priv->dev);
1701 if (info == NULL) {
1702 dev_err(priv->dev, "unable to allocate fb_info\n");
1703 return -ENOMEM;
1704 }
1705
1706 ovl->info = info;
1707
1708 info->flags = FBINFO_FLAG_DEFAULT;
1709 info->fbops = &sh_mobile_lcdc_overlay_ops;
1710 info->device = priv->dev;
1711 info->screen_base = ovl->fb_mem;
1712 info->par = ovl;
1713
1714 /* Initialize fixed screen information. Restrict pan to 2 lines steps
1715 * for NV12 and NV21.
1716 */
1717 info->fix = sh_mobile_lcdc_overlay_fix;
1718 snprintf(info->fix.id, sizeof(info->fix.id),
1719 "SH Mobile LCDC Overlay %u", ovl->index);
1720 info->fix.smem_start = ovl->dma_handle;
1721 info->fix.smem_len = ovl->fb_size;
1722 info->fix.line_length = ovl->pitch;
1723
1724 if (ovl->format->yuv)
1725 info->fix.visual = FB_VISUAL_FOURCC;
1726 else
1727 info->fix.visual = FB_VISUAL_TRUECOLOR;
1728
1729 switch (ovl->format->fourcc) {
1730 case V4L2_PIX_FMT_NV12:
1731 case V4L2_PIX_FMT_NV21:
1732 info->fix.ypanstep = 2;
1733 case V4L2_PIX_FMT_NV16:
1734 case V4L2_PIX_FMT_NV61:
1735 info->fix.xpanstep = 2;
1736 }
1737
1738 /* Initialize variable screen information. */
1739 var = &info->var;
1740 memset(var, 0, sizeof(*var));
1741 var->xres = ovl->xres;
1742 var->yres = ovl->yres;
1743 var->xres_virtual = ovl->xres_virtual;
1744 var->yres_virtual = ovl->yres_virtual;
1745 var->activate = FB_ACTIVATE_NOW;
1746
1747 /* Use the legacy API by default for RGB formats, and the FOURCC API
1748 * for YUV formats.
1749 */
1750 if (!ovl->format->yuv)
1751 var->bits_per_pixel = ovl->format->bpp;
1752 else
1753 var->grayscale = ovl->format->fourcc;
1754
1755 return sh_mobile_lcdc_overlay_check_var(var, info);
1756 }
1757
1758 /* -----------------------------------------------------------------------------
1759 * Frame buffer operations - main frame buffer
1760 */
1761
1762 static int sh_mobile_lcdc_setcolreg(u_int regno,
1763 u_int red, u_int green, u_int blue,
1764 u_int transp, struct fb_info *info)
1765 {
1766 u32 *palette = info->pseudo_palette;
1767
1768 if (regno >= PALETTE_NR)
1769 return -EINVAL;
1770
1771 /* only FB_VISUAL_TRUECOLOR supported */
1772
1773 red >>= 16 - info->var.red.length;
1774 green >>= 16 - info->var.green.length;
1775 blue >>= 16 - info->var.blue.length;
1776 transp >>= 16 - info->var.transp.length;
1777
1778 palette[regno] = (red << info->var.red.offset) |
1779 (green << info->var.green.offset) |
1780 (blue << info->var.blue.offset) |
1781 (transp << info->var.transp.offset);
1782
1783 return 0;
1784 }
1785
1786 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
1787 .id = "SH Mobile LCDC",
1788 .type = FB_TYPE_PACKED_PIXELS,
1789 .visual = FB_VISUAL_TRUECOLOR,
1790 .accel = FB_ACCEL_NONE,
1791 .xpanstep = 1,
1792 .ypanstep = 1,
1793 .ywrapstep = 0,
1794 .capabilities = FB_CAP_FOURCC,
1795 };
1796
1797 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1798 const struct fb_fillrect *rect)
1799 {
1800 sys_fillrect(info, rect);
1801 sh_mobile_lcdc_deferred_io_touch(info);
1802 }
1803
1804 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1805 const struct fb_copyarea *area)
1806 {
1807 sys_copyarea(info, area);
1808 sh_mobile_lcdc_deferred_io_touch(info);
1809 }
1810
1811 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1812 const struct fb_image *image)
1813 {
1814 sys_imageblit(info, image);
1815 sh_mobile_lcdc_deferred_io_touch(info);
1816 }
1817
1818 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1819 struct fb_info *info)
1820 {
1821 struct sh_mobile_lcdc_chan *ch = info->par;
1822 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1823 unsigned long ldrcntr;
1824 unsigned long base_addr_y, base_addr_c;
1825 unsigned long y_offset;
1826 unsigned long c_offset;
1827
1828 if (!ch->format->yuv) {
1829 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1830 * ch->format->bpp / 8;
1831 c_offset = 0;
1832 } else {
1833 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1834 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1835
1836 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1837 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1838 + var->xoffset * 2 / xsub;
1839 }
1840
1841 /* If the Y offset hasn't changed, the C offset hasn't either. There's
1842 * nothing to do in that case.
1843 */
1844 if (y_offset == ch->pan_y_offset)
1845 return 0;
1846
1847 /* Set the source address for the next refresh */
1848 base_addr_y = ch->dma_handle + y_offset;
1849 base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1850 + c_offset;
1851
1852 if (ch->cache)
1853 sh_mobile_meram_cache_update(priv->meram_dev, ch->cache,
1854 base_addr_y, base_addr_c,
1855 &base_addr_y, &base_addr_c);
1856
1857 ch->base_addr_y = base_addr_y;
1858 ch->base_addr_c = base_addr_c;
1859 ch->pan_y_offset = y_offset;
1860
1861 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1862 if (ch->format->yuv)
1863 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1864
1865 ldrcntr = lcdc_read(priv, _LDRCNTR);
1866 if (lcdc_chan_is_sublcd(ch))
1867 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1868 else
1869 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1870
1871
1872 sh_mobile_lcdc_deferred_io_touch(info);
1873
1874 return 0;
1875 }
1876
1877 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1878 unsigned long arg)
1879 {
1880 struct sh_mobile_lcdc_chan *ch = info->par;
1881 int retval;
1882
1883 switch (cmd) {
1884 case FBIO_WAITFORVSYNC:
1885 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1886 break;
1887
1888 default:
1889 retval = -ENOIOCTLCMD;
1890 break;
1891 }
1892 return retval;
1893 }
1894
1895 static void sh_mobile_fb_reconfig(struct fb_info *info)
1896 {
1897 struct sh_mobile_lcdc_chan *ch = info->par;
1898 struct fb_var_screeninfo var;
1899 struct fb_videomode mode;
1900 struct fb_event event;
1901 int evnt = FB_EVENT_MODE_CHANGE_ALL;
1902
1903 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1904 /* More framebuffer users are active */
1905 return;
1906
1907 fb_var_to_videomode(&mode, &info->var);
1908
1909 if (fb_mode_is_equal(&ch->display.mode, &mode))
1910 return;
1911
1912 /* Display has been re-plugged, framebuffer is free now, reconfigure */
1913 var = info->var;
1914 fb_videomode_to_var(&var, &ch->display.mode);
1915 var.width = ch->display.width;
1916 var.height = ch->display.height;
1917 var.activate = FB_ACTIVATE_NOW;
1918
1919 if (fb_set_var(info, &var) < 0)
1920 /* Couldn't reconfigure, hopefully, can continue as before */
1921 return;
1922
1923 /*
1924 * fb_set_var() calls the notifier change internally, only if
1925 * FBINFO_MISC_USEREVENT flag is set. Since we do not want to fake a
1926 * user event, we have to call the chain ourselves.
1927 */
1928 event.info = info;
1929 event.data = &ch->display.mode;
1930 fb_notifier_call_chain(evnt, &event);
1931 }
1932
1933 /*
1934 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1935 * user == 1, or with console sem held, if user == 0.
1936 */
1937 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1938 {
1939 struct sh_mobile_lcdc_chan *ch = info->par;
1940
1941 mutex_lock(&ch->open_lock);
1942 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1943
1944 ch->use_count--;
1945
1946 /* Nothing to reconfigure, when called from fbcon */
1947 if (user) {
1948 console_lock();
1949 sh_mobile_fb_reconfig(info);
1950 console_unlock();
1951 }
1952
1953 mutex_unlock(&ch->open_lock);
1954
1955 return 0;
1956 }
1957
1958 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1959 {
1960 struct sh_mobile_lcdc_chan *ch = info->par;
1961
1962 mutex_lock(&ch->open_lock);
1963 ch->use_count++;
1964
1965 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1966 mutex_unlock(&ch->open_lock);
1967
1968 return 0;
1969 }
1970
1971 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1972 struct fb_info *info)
1973 {
1974 struct sh_mobile_lcdc_chan *ch = info->par;
1975 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1976 unsigned int best_dist = (unsigned int)-1;
1977 unsigned int best_xres = 0;
1978 unsigned int best_yres = 0;
1979 unsigned int i;
1980 int ret;
1981
1982 /* If board code provides us with a list of available modes, make sure
1983 * we use one of them. Find the mode closest to the requested one. The
1984 * distance between two modes is defined as the size of the
1985 * non-overlapping parts of the two rectangles.
1986 */
1987 for (i = 0; i < ch->cfg->num_modes; ++i) {
1988 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1989 unsigned int dist;
1990
1991 /* We can only round up. */
1992 if (var->xres > mode->xres || var->yres > mode->yres)
1993 continue;
1994
1995 dist = var->xres * var->yres + mode->xres * mode->yres
1996 - 2 * min(var->xres, mode->xres)
1997 * min(var->yres, mode->yres);
1998
1999 if (dist < best_dist) {
2000 best_xres = mode->xres;
2001 best_yres = mode->yres;
2002 best_dist = dist;
2003 }
2004 }
2005
2006 /* If no available mode can be used, return an error. */
2007 if (ch->cfg->num_modes != 0) {
2008 if (best_dist == (unsigned int)-1)
2009 return -EINVAL;
2010
2011 var->xres = best_xres;
2012 var->yres = best_yres;
2013 }
2014
2015 ret = __sh_mobile_lcdc_check_var(var, info);
2016 if (ret < 0)
2017 return ret;
2018
2019 /* only accept the forced_fourcc for dual channel configurations */
2020 if (p->forced_fourcc &&
2021 p->forced_fourcc != sh_mobile_format_fourcc(var))
2022 return -EINVAL;
2023
2024 return 0;
2025 }
2026
2027 static int sh_mobile_lcdc_set_par(struct fb_info *info)
2028 {
2029 struct sh_mobile_lcdc_chan *ch = info->par;
2030 int ret;
2031
2032 sh_mobile_lcdc_stop(ch->lcdc);
2033
2034 ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
2035 ch->colorspace = info->var.colorspace;
2036
2037 ch->xres = info->var.xres;
2038 ch->xres_virtual = info->var.xres_virtual;
2039 ch->yres = info->var.yres;
2040 ch->yres_virtual = info->var.yres_virtual;
2041
2042 if (ch->format->yuv)
2043 ch->pitch = info->var.xres_virtual;
2044 else
2045 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
2046
2047 ret = sh_mobile_lcdc_start(ch->lcdc);
2048 if (ret < 0)
2049 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
2050
2051 info->fix.line_length = ch->pitch;
2052
2053 if (sh_mobile_format_is_fourcc(&info->var)) {
2054 info->fix.type = FB_TYPE_FOURCC;
2055 info->fix.visual = FB_VISUAL_FOURCC;
2056 } else {
2057 info->fix.type = FB_TYPE_PACKED_PIXELS;
2058 info->fix.visual = FB_VISUAL_TRUECOLOR;
2059 }
2060
2061 return ret;
2062 }
2063
2064 /*
2065 * Screen blanking. Behavior is as follows:
2066 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
2067 * FB_BLANK_NORMAL: screen blanked, clocks enabled
2068 * FB_BLANK_VSYNC,
2069 * FB_BLANK_HSYNC,
2070 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
2071 */
2072 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
2073 {
2074 struct sh_mobile_lcdc_chan *ch = info->par;
2075 struct sh_mobile_lcdc_priv *p = ch->lcdc;
2076
2077 /* blank the screen? */
2078 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
2079 struct fb_fillrect rect = {
2080 .width = ch->xres,
2081 .height = ch->yres,
2082 };
2083 sh_mobile_lcdc_fillrect(info, &rect);
2084 }
2085 /* turn clocks on? */
2086 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
2087 sh_mobile_lcdc_clk_on(p);
2088 }
2089 /* turn clocks off? */
2090 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
2091 /* make sure the screen is updated with the black fill before
2092 * switching the clocks off. one vsync is not enough since
2093 * blanking may occur in the middle of a refresh. deferred io
2094 * mode will reenable the clocks and update the screen in time,
2095 * so it does not need this. */
2096 if (!info->fbdefio) {
2097 sh_mobile_lcdc_wait_for_vsync(ch);
2098 sh_mobile_lcdc_wait_for_vsync(ch);
2099 }
2100 sh_mobile_lcdc_clk_off(p);
2101 }
2102
2103 ch->blank_status = blank;
2104 return 0;
2105 }
2106
2107 static int
2108 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
2109 {
2110 struct sh_mobile_lcdc_chan *ch = info->par;
2111
2112 return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
2113 ch->dma_handle, ch->fb_size);
2114 }
2115
2116 static struct fb_ops sh_mobile_lcdc_ops = {
2117 .owner = THIS_MODULE,
2118 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
2119 .fb_read = fb_sys_read,
2120 .fb_write = fb_sys_write,
2121 .fb_fillrect = sh_mobile_lcdc_fillrect,
2122 .fb_copyarea = sh_mobile_lcdc_copyarea,
2123 .fb_imageblit = sh_mobile_lcdc_imageblit,
2124 .fb_blank = sh_mobile_lcdc_blank,
2125 .fb_pan_display = sh_mobile_lcdc_pan,
2126 .fb_ioctl = sh_mobile_lcdc_ioctl,
2127 .fb_open = sh_mobile_lcdc_open,
2128 .fb_release = sh_mobile_lcdc_release,
2129 .fb_check_var = sh_mobile_lcdc_check_var,
2130 .fb_set_par = sh_mobile_lcdc_set_par,
2131 .fb_mmap = sh_mobile_lcdc_mmap,
2132 };
2133
2134 static void
2135 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
2136 {
2137 if (ch->info && ch->info->dev)
2138 unregister_framebuffer(ch->info);
2139 }
2140
2141 static int
2142 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
2143 {
2144 struct fb_info *info = ch->info;
2145 int ret;
2146
2147 if (info->fbdefio) {
2148 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2149 ch->fb_size >> PAGE_SHIFT);
2150 if (!ch->sglist) {
2151 dev_err(ch->lcdc->dev, "cannot allocate sglist\n");
2152 return -ENOMEM;
2153 }
2154 }
2155
2156 info->bl_dev = ch->bl;
2157
2158 ret = register_framebuffer(info);
2159 if (ret < 0)
2160 return ret;
2161
2162 dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2163 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2164 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2165 info->var.bits_per_pixel);
2166
2167 /* deferred io mode: disable clock to save power */
2168 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2169 sh_mobile_lcdc_clk_off(ch->lcdc);
2170
2171 return ret;
2172 }
2173
2174 static void
2175 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2176 {
2177 struct fb_info *info = ch->info;
2178
2179 if (!info || !info->device)
2180 return;
2181
2182 if (ch->sglist)
2183 vfree(ch->sglist);
2184
2185 fb_dealloc_cmap(&info->cmap);
2186 framebuffer_release(info);
2187 }
2188
2189 static int
2190 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2191 const struct fb_videomode *modes,
2192 unsigned int num_modes)
2193 {
2194 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2195 struct fb_var_screeninfo *var;
2196 struct fb_info *info;
2197 int ret;
2198
2199 /* Allocate and initialize the frame buffer device. Create the modes
2200 * list and allocate the color map.
2201 */
2202 info = framebuffer_alloc(0, priv->dev);
2203 if (info == NULL) {
2204 dev_err(priv->dev, "unable to allocate fb_info\n");
2205 return -ENOMEM;
2206 }
2207
2208 ch->info = info;
2209
2210 info->flags = FBINFO_FLAG_DEFAULT;
2211 info->fbops = &sh_mobile_lcdc_ops;
2212 info->device = priv->dev;
2213 info->screen_base = ch->fb_mem;
2214 info->pseudo_palette = &ch->pseudo_palette;
2215 info->par = ch;
2216
2217 fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2218
2219 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2220 if (ret < 0) {
2221 dev_err(priv->dev, "unable to allocate cmap\n");
2222 return ret;
2223 }
2224
2225 /* Initialize fixed screen information. Restrict pan to 2 lines steps
2226 * for NV12 and NV21.
2227 */
2228 info->fix = sh_mobile_lcdc_fix;
2229 info->fix.smem_start = ch->dma_handle;
2230 info->fix.smem_len = ch->fb_size;
2231 info->fix.line_length = ch->pitch;
2232
2233 if (ch->format->yuv)
2234 info->fix.visual = FB_VISUAL_FOURCC;
2235 else
2236 info->fix.visual = FB_VISUAL_TRUECOLOR;
2237
2238 switch (ch->format->fourcc) {
2239 case V4L2_PIX_FMT_NV12:
2240 case V4L2_PIX_FMT_NV21:
2241 info->fix.ypanstep = 2;
2242 case V4L2_PIX_FMT_NV16:
2243 case V4L2_PIX_FMT_NV61:
2244 info->fix.xpanstep = 2;
2245 }
2246
2247 /* Initialize variable screen information using the first mode as
2248 * default.
2249 */
2250 var = &info->var;
2251 fb_videomode_to_var(var, modes);
2252 var->width = ch->display.width;
2253 var->height = ch->display.height;
2254 var->xres_virtual = ch->xres_virtual;
2255 var->yres_virtual = ch->yres_virtual;
2256 var->activate = FB_ACTIVATE_NOW;
2257
2258 /* Use the legacy API by default for RGB formats, and the FOURCC API
2259 * for YUV formats.
2260 */
2261 if (!ch->format->yuv)
2262 var->bits_per_pixel = ch->format->bpp;
2263 else
2264 var->grayscale = ch->format->fourcc;
2265
2266 ret = sh_mobile_lcdc_check_var(var, info);
2267 if (ret)
2268 return ret;
2269
2270 return 0;
2271 }
2272
2273 /* -----------------------------------------------------------------------------
2274 * Backlight
2275 */
2276
2277 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2278 {
2279 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2280 int brightness = bdev->props.brightness;
2281
2282 if (bdev->props.power != FB_BLANK_UNBLANK ||
2283 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2284 brightness = 0;
2285
2286 ch->bl_brightness = brightness;
2287 return ch->cfg->bl_info.set_brightness(brightness);
2288 }
2289
2290 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2291 {
2292 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2293
2294 return ch->bl_brightness;
2295 }
2296
2297 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2298 struct fb_info *info)
2299 {
2300 return (info->bl_dev == bdev);
2301 }
2302
2303 static struct backlight_ops sh_mobile_lcdc_bl_ops = {
2304 .options = BL_CORE_SUSPENDRESUME,
2305 .update_status = sh_mobile_lcdc_update_bl,
2306 .get_brightness = sh_mobile_lcdc_get_brightness,
2307 .check_fb = sh_mobile_lcdc_check_fb,
2308 };
2309
2310 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2311 struct sh_mobile_lcdc_chan *ch)
2312 {
2313 struct backlight_device *bl;
2314
2315 bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2316 &sh_mobile_lcdc_bl_ops, NULL);
2317 if (IS_ERR(bl)) {
2318 dev_err(parent, "unable to register backlight device: %ld\n",
2319 PTR_ERR(bl));
2320 return NULL;
2321 }
2322
2323 bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2324 bl->props.brightness = bl->props.max_brightness;
2325 backlight_update_status(bl);
2326
2327 return bl;
2328 }
2329
2330 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2331 {
2332 backlight_device_unregister(bdev);
2333 }
2334
2335 /* -----------------------------------------------------------------------------
2336 * Power management
2337 */
2338
2339 static int sh_mobile_lcdc_suspend(struct device *dev)
2340 {
2341 struct platform_device *pdev = to_platform_device(dev);
2342
2343 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2344 return 0;
2345 }
2346
2347 static int sh_mobile_lcdc_resume(struct device *dev)
2348 {
2349 struct platform_device *pdev = to_platform_device(dev);
2350
2351 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2352 }
2353
2354 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2355 {
2356 struct platform_device *pdev = to_platform_device(dev);
2357 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2358
2359 /* turn off LCDC hardware */
2360 lcdc_write(priv, _LDCNT1R, 0);
2361
2362 return 0;
2363 }
2364
2365 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2366 {
2367 struct platform_device *pdev = to_platform_device(dev);
2368 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2369
2370 __sh_mobile_lcdc_start(priv);
2371
2372 return 0;
2373 }
2374
2375 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2376 .suspend = sh_mobile_lcdc_suspend,
2377 .resume = sh_mobile_lcdc_resume,
2378 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2379 .runtime_resume = sh_mobile_lcdc_runtime_resume,
2380 };
2381
2382 /* -----------------------------------------------------------------------------
2383 * Framebuffer notifier
2384 */
2385
2386 /* locking: called with info->lock held */
2387 static int sh_mobile_lcdc_notify(struct notifier_block *nb,
2388 unsigned long action, void *data)
2389 {
2390 struct fb_event *event = data;
2391 struct fb_info *info = event->info;
2392 struct sh_mobile_lcdc_chan *ch = info->par;
2393
2394 if (&ch->lcdc->notifier != nb)
2395 return NOTIFY_DONE;
2396
2397 dev_dbg(info->dev, "%s(): action = %lu, data = %p\n",
2398 __func__, action, event->data);
2399
2400 switch(action) {
2401 case FB_EVENT_SUSPEND:
2402 sh_mobile_lcdc_display_off(ch);
2403 sh_mobile_lcdc_stop(ch->lcdc);
2404 break;
2405 case FB_EVENT_RESUME:
2406 mutex_lock(&ch->open_lock);
2407 sh_mobile_fb_reconfig(info);
2408 mutex_unlock(&ch->open_lock);
2409
2410 sh_mobile_lcdc_display_on(ch);
2411 sh_mobile_lcdc_start(ch->lcdc);
2412 }
2413
2414 return NOTIFY_OK;
2415 }
2416
2417 /* -----------------------------------------------------------------------------
2418 * Probe/remove and driver init/exit
2419 */
2420
2421 static const struct fb_videomode default_720p = {
2422 .name = "HDMI 720p",
2423 .xres = 1280,
2424 .yres = 720,
2425
2426 .left_margin = 220,
2427 .right_margin = 110,
2428 .hsync_len = 40,
2429
2430 .upper_margin = 20,
2431 .lower_margin = 5,
2432 .vsync_len = 5,
2433
2434 .pixclock = 13468,
2435 .refresh = 60,
2436 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2437 };
2438
2439 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2440 {
2441 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2442 unsigned int i;
2443
2444 fb_unregister_client(&priv->notifier);
2445
2446 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2447 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2448 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2449 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2450
2451 sh_mobile_lcdc_stop(priv);
2452
2453 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2454 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2455
2456 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2457
2458 if (ovl->fb_mem)
2459 dma_free_coherent(&pdev->dev, ovl->fb_size,
2460 ovl->fb_mem, ovl->dma_handle);
2461 }
2462
2463 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2464 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2465
2466 if (ch->tx_dev) {
2467 ch->tx_dev->lcdc = NULL;
2468 module_put(ch->cfg->tx_dev->dev.driver->owner);
2469 }
2470
2471 sh_mobile_lcdc_channel_fb_cleanup(ch);
2472
2473 if (ch->fb_mem)
2474 dma_free_coherent(&pdev->dev, ch->fb_size,
2475 ch->fb_mem, ch->dma_handle);
2476 }
2477
2478 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2479 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2480
2481 if (ch->bl)
2482 sh_mobile_lcdc_bl_remove(ch->bl);
2483 mutex_destroy(&ch->open_lock);
2484 }
2485
2486 if (priv->dot_clk) {
2487 pm_runtime_disable(&pdev->dev);
2488 clk_put(priv->dot_clk);
2489 }
2490
2491 if (priv->base)
2492 iounmap(priv->base);
2493
2494 if (priv->irq)
2495 free_irq(priv->irq, priv);
2496 kfree(priv);
2497 return 0;
2498 }
2499
2500 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2501 {
2502 int interface_type = ch->cfg->interface_type;
2503
2504 switch (interface_type) {
2505 case RGB8:
2506 case RGB9:
2507 case RGB12A:
2508 case RGB12B:
2509 case RGB16:
2510 case RGB18:
2511 case RGB24:
2512 case SYS8A:
2513 case SYS8B:
2514 case SYS8C:
2515 case SYS8D:
2516 case SYS9:
2517 case SYS12:
2518 case SYS16A:
2519 case SYS16B:
2520 case SYS16C:
2521 case SYS18:
2522 case SYS24:
2523 break;
2524 default:
2525 return -EINVAL;
2526 }
2527
2528 /* SUBLCD only supports SYS interface */
2529 if (lcdc_chan_is_sublcd(ch)) {
2530 if (!(interface_type & LDMT1R_IFM))
2531 return -EINVAL;
2532
2533 interface_type &= ~LDMT1R_IFM;
2534 }
2535
2536 ch->ldmt1r_value = interface_type;
2537 return 0;
2538 }
2539
2540 static int
2541 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2542 {
2543 const struct sh_mobile_lcdc_format_info *format;
2544 struct device *dev = ovl->channel->lcdc->dev;
2545 int ret;
2546
2547 if (ovl->cfg->fourcc == 0)
2548 return 0;
2549
2550 /* Validate the format. */
2551 format = sh_mobile_format_info(ovl->cfg->fourcc);
2552 if (format == NULL) {
2553 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2554 return -EINVAL;
2555 }
2556
2557 ovl->enabled = false;
2558 ovl->mode = LCDC_OVERLAY_BLEND;
2559 ovl->alpha = 255;
2560 ovl->rop3 = 0;
2561 ovl->pos_x = 0;
2562 ovl->pos_y = 0;
2563
2564 /* The default Y virtual resolution is twice the panel size to allow for
2565 * double-buffering.
2566 */
2567 ovl->format = format;
2568 ovl->xres = ovl->cfg->max_xres;
2569 ovl->xres_virtual = ovl->xres;
2570 ovl->yres = ovl->cfg->max_yres;
2571 ovl->yres_virtual = ovl->yres * 2;
2572
2573 if (!format->yuv)
2574 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2575 else
2576 ovl->pitch = ovl->xres_virtual;
2577
2578 /* Allocate frame buffer memory. */
2579 ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2580 * format->bpp / 8 * 2;
2581 ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2582 GFP_KERNEL);
2583 if (!ovl->fb_mem) {
2584 dev_err(dev, "unable to allocate buffer\n");
2585 return -ENOMEM;
2586 }
2587
2588 ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2589 if (ret < 0)
2590 return ret;
2591
2592 return 0;
2593 }
2594
2595 static int
2596 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2597 {
2598 const struct sh_mobile_lcdc_format_info *format;
2599 const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2600 struct device *dev = ch->lcdc->dev;
2601 const struct fb_videomode *max_mode;
2602 const struct fb_videomode *mode;
2603 unsigned int num_modes;
2604 unsigned int max_size;
2605 unsigned int i;
2606
2607 mutex_init(&ch->open_lock);
2608 ch->notify = sh_mobile_lcdc_display_notify;
2609
2610 /* Validate the format. */
2611 format = sh_mobile_format_info(cfg->fourcc);
2612 if (format == NULL) {
2613 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2614 return -EINVAL;
2615 }
2616
2617 /* Iterate through the modes to validate them and find the highest
2618 * resolution.
2619 */
2620 max_mode = NULL;
2621 max_size = 0;
2622
2623 for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2624 unsigned int size = mode->yres * mode->xres;
2625
2626 /* NV12/NV21 buffers must have even number of lines */
2627 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2628 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2629 dev_err(dev, "yres must be multiple of 2 for "
2630 "YCbCr420 mode.\n");
2631 return -EINVAL;
2632 }
2633
2634 if (size > max_size) {
2635 max_mode = mode;
2636 max_size = size;
2637 }
2638 }
2639
2640 if (!max_size)
2641 max_size = MAX_XRES * MAX_YRES;
2642 else
2643 dev_dbg(dev, "Found largest videomode %ux%u\n",
2644 max_mode->xres, max_mode->yres);
2645
2646 if (cfg->lcd_modes == NULL) {
2647 mode = &default_720p;
2648 num_modes = 1;
2649 } else {
2650 mode = cfg->lcd_modes;
2651 num_modes = cfg->num_modes;
2652 }
2653
2654 /* Use the first mode as default. The default Y virtual resolution is
2655 * twice the panel size to allow for double-buffering.
2656 */
2657 ch->format = format;
2658 ch->xres = mode->xres;
2659 ch->xres_virtual = mode->xres;
2660 ch->yres = mode->yres;
2661 ch->yres_virtual = mode->yres * 2;
2662
2663 if (!format->yuv) {
2664 ch->colorspace = V4L2_COLORSPACE_SRGB;
2665 ch->pitch = ch->xres_virtual * format->bpp / 8;
2666 } else {
2667 ch->colorspace = V4L2_COLORSPACE_REC709;
2668 ch->pitch = ch->xres_virtual;
2669 }
2670
2671 ch->display.width = cfg->panel_cfg.width;
2672 ch->display.height = cfg->panel_cfg.height;
2673 ch->display.mode = *mode;
2674
2675 /* Allocate frame buffer memory. */
2676 ch->fb_size = max_size * format->bpp / 8 * 2;
2677 ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2678 GFP_KERNEL);
2679 if (ch->fb_mem == NULL) {
2680 dev_err(dev, "unable to allocate buffer\n");
2681 return -ENOMEM;
2682 }
2683
2684 /* Initialize the transmitter device if present. */
2685 if (cfg->tx_dev) {
2686 if (!cfg->tx_dev->dev.driver ||
2687 !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2688 dev_warn(dev, "unable to get transmitter device\n");
2689 return -EINVAL;
2690 }
2691 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2692 ch->tx_dev->lcdc = ch;
2693 ch->tx_dev->def_mode = *mode;
2694 }
2695
2696 return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2697 }
2698
2699 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2700 {
2701 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2702 struct sh_mobile_lcdc_priv *priv;
2703 struct resource *res;
2704 int num_channels;
2705 int error;
2706 int i;
2707
2708 if (!pdata) {
2709 dev_err(&pdev->dev, "no platform data defined\n");
2710 return -EINVAL;
2711 }
2712
2713 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2714 i = platform_get_irq(pdev, 0);
2715 if (!res || i < 0) {
2716 dev_err(&pdev->dev, "cannot get platform resources\n");
2717 return -ENOENT;
2718 }
2719
2720 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2721 if (!priv) {
2722 dev_err(&pdev->dev, "cannot allocate device data\n");
2723 return -ENOMEM;
2724 }
2725
2726 priv->dev = &pdev->dev;
2727 priv->meram_dev = pdata->meram_dev;
2728 platform_set_drvdata(pdev, priv);
2729
2730 error = request_irq(i, sh_mobile_lcdc_irq, 0,
2731 dev_name(&pdev->dev), priv);
2732 if (error) {
2733 dev_err(&pdev->dev, "unable to request irq\n");
2734 goto err1;
2735 }
2736
2737 priv->irq = i;
2738 atomic_set(&priv->hw_usecnt, -1);
2739
2740 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2741 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2742
2743 ch->lcdc = priv;
2744 ch->cfg = &pdata->ch[i];
2745
2746 error = sh_mobile_lcdc_check_interface(ch);
2747 if (error) {
2748 dev_err(&pdev->dev, "unsupported interface type\n");
2749 goto err1;
2750 }
2751 init_waitqueue_head(&ch->frame_end_wait);
2752 init_completion(&ch->vsync_completion);
2753
2754 /* probe the backlight is there is one defined */
2755 if (ch->cfg->bl_info.max_brightness)
2756 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2757
2758 switch (pdata->ch[i].chan) {
2759 case LCDC_CHAN_MAINLCD:
2760 ch->enabled = LDCNT2R_ME;
2761 ch->reg_offs = lcdc_offs_mainlcd;
2762 num_channels++;
2763 break;
2764 case LCDC_CHAN_SUBLCD:
2765 ch->enabled = LDCNT2R_SE;
2766 ch->reg_offs = lcdc_offs_sublcd;
2767 num_channels++;
2768 break;
2769 }
2770 }
2771
2772 if (!num_channels) {
2773 dev_err(&pdev->dev, "no channels defined\n");
2774 error = -EINVAL;
2775 goto err1;
2776 }
2777
2778 /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2779 if (num_channels == 2)
2780 priv->forced_fourcc = pdata->ch[0].fourcc;
2781
2782 priv->base = ioremap_nocache(res->start, resource_size(res));
2783 if (!priv->base)
2784 goto err1;
2785
2786 error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2787 if (error) {
2788 dev_err(&pdev->dev, "unable to setup clocks\n");
2789 goto err1;
2790 }
2791
2792 /* Enable runtime PM. */
2793 pm_runtime_enable(&pdev->dev);
2794
2795 for (i = 0; i < num_channels; i++) {
2796 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2797
2798 error = sh_mobile_lcdc_channel_init(ch);
2799 if (error)
2800 goto err1;
2801 }
2802
2803 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2804 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2805
2806 ovl->cfg = &pdata->overlays[i];
2807 ovl->channel = &priv->ch[0];
2808
2809 error = sh_mobile_lcdc_overlay_init(ovl);
2810 if (error)
2811 goto err1;
2812 }
2813
2814 error = sh_mobile_lcdc_start(priv);
2815 if (error) {
2816 dev_err(&pdev->dev, "unable to start hardware\n");
2817 goto err1;
2818 }
2819
2820 for (i = 0; i < num_channels; i++) {
2821 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2822
2823 error = sh_mobile_lcdc_channel_fb_register(ch);
2824 if (error)
2825 goto err1;
2826 }
2827
2828 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2829 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2830
2831 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2832 if (error)
2833 goto err1;
2834 }
2835
2836 /* Failure ignored */
2837 priv->notifier.notifier_call = sh_mobile_lcdc_notify;
2838 fb_register_client(&priv->notifier);
2839
2840 return 0;
2841 err1:
2842 sh_mobile_lcdc_remove(pdev);
2843
2844 return error;
2845 }
2846
2847 static struct platform_driver sh_mobile_lcdc_driver = {
2848 .driver = {
2849 .name = "sh_mobile_lcdc_fb",
2850 .owner = THIS_MODULE,
2851 .pm = &sh_mobile_lcdc_dev_pm_ops,
2852 },
2853 .probe = sh_mobile_lcdc_probe,
2854 .remove = sh_mobile_lcdc_remove,
2855 };
2856
2857 module_platform_driver(sh_mobile_lcdc_driver);
2858
2859 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2860 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2861 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support