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gpio: rcar: Fix runtime PM imbalance on error
[linux/fpc-iii.git] / drivers / video / fbdev / sh_mobile_lcdcfb.c
blob8a27d12e6ea879543b8e569f0f8387ad1f12b177
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/fbcon.h>
19 #include <linux/gpio.h>
20 #include <linux/init.h>
21 #include <linux/interrupt.h>
22 #include <linux/ioctl.h>
23 #include <linux/kernel.h>
24 #include <linux/mm.h>
25 #include <linux/module.h>
26 #include <linux/platform_device.h>
27 #include <linux/pm_runtime.h>
28 #include <linux/slab.h>
29 #include <linux/videodev2.h>
30 #include <linux/vmalloc.h>
31
32 #include <video/sh_mobile_lcdc.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 int started;
218 int forced_fourcc; /* 2 channel LCDC must share fourcc setting */
219 };
220
221 /* -----------------------------------------------------------------------------
222 * Registers access
223 */
224
225 static unsigned long lcdc_offs_mainlcd[NR_CH_REGS] = {
226 [LDDCKPAT1R] = 0x400,
227 [LDDCKPAT2R] = 0x404,
228 [LDMT1R] = 0x418,
229 [LDMT2R] = 0x41c,
230 [LDMT3R] = 0x420,
231 [LDDFR] = 0x424,
232 [LDSM1R] = 0x428,
233 [LDSM2R] = 0x42c,
234 [LDSA1R] = 0x430,
235 [LDSA2R] = 0x434,
236 [LDMLSR] = 0x438,
237 [LDHCNR] = 0x448,
238 [LDHSYNR] = 0x44c,
239 [LDVLNR] = 0x450,
240 [LDVSYNR] = 0x454,
241 [LDPMR] = 0x460,
242 [LDHAJR] = 0x4a0,
243 };
244
245 static unsigned long lcdc_offs_sublcd[NR_CH_REGS] = {
246 [LDDCKPAT1R] = 0x408,
247 [LDDCKPAT2R] = 0x40c,
248 [LDMT1R] = 0x600,
249 [LDMT2R] = 0x604,
250 [LDMT3R] = 0x608,
251 [LDDFR] = 0x60c,
252 [LDSM1R] = 0x610,
253 [LDSM2R] = 0x614,
254 [LDSA1R] = 0x618,
255 [LDMLSR] = 0x620,
256 [LDHCNR] = 0x624,
257 [LDHSYNR] = 0x628,
258 [LDVLNR] = 0x62c,
259 [LDVSYNR] = 0x630,
260 [LDPMR] = 0x63c,
261 };
262
263 static bool banked(int reg_nr)
264 {
265 switch (reg_nr) {
266 case LDMT1R:
267 case LDMT2R:
268 case LDMT3R:
269 case LDDFR:
270 case LDSM1R:
271 case LDSA1R:
272 case LDSA2R:
273 case LDMLSR:
274 case LDHCNR:
275 case LDHSYNR:
276 case LDVLNR:
277 case LDVSYNR:
278 return true;
279 }
280 return false;
281 }
282
283 static int lcdc_chan_is_sublcd(struct sh_mobile_lcdc_chan *chan)
284 {
285 return chan->cfg->chan == LCDC_CHAN_SUBLCD;
286 }
287
288 static void lcdc_write_chan(struct sh_mobile_lcdc_chan *chan,
289 int reg_nr, unsigned long data)
290 {
291 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr]);
292 if (banked(reg_nr))
293 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
294 SIDE_B_OFFSET);
295 }
296
297 static void lcdc_write_chan_mirror(struct sh_mobile_lcdc_chan *chan,
298 int reg_nr, unsigned long data)
299 {
300 iowrite32(data, chan->lcdc->base + chan->reg_offs[reg_nr] +
301 MIRROR_OFFSET);
302 }
303
304 static unsigned long lcdc_read_chan(struct sh_mobile_lcdc_chan *chan,
305 int reg_nr)
306 {
307 return ioread32(chan->lcdc->base + chan->reg_offs[reg_nr]);
308 }
309
310 static void lcdc_write_overlay(struct sh_mobile_lcdc_overlay *ovl,
311 int reg, unsigned long data)
312 {
313 iowrite32(data, ovl->channel->lcdc->base + reg);
314 iowrite32(data, ovl->channel->lcdc->base + reg + SIDE_B_OFFSET);
315 }
316
317 static void lcdc_write(struct sh_mobile_lcdc_priv *priv,
318 unsigned long reg_offs, unsigned long data)
319 {
320 iowrite32(data, priv->base + reg_offs);
321 }
322
323 static unsigned long lcdc_read(struct sh_mobile_lcdc_priv *priv,
324 unsigned long reg_offs)
325 {
326 return ioread32(priv->base + reg_offs);
327 }
328
329 static void lcdc_wait_bit(struct sh_mobile_lcdc_priv *priv,
330 unsigned long reg_offs,
331 unsigned long mask, unsigned long until)
332 {
333 while ((lcdc_read(priv, reg_offs) & mask) != until)
334 cpu_relax();
335 }
336
337 /* -----------------------------------------------------------------------------
338 * Clock management
339 */
340
341 static void sh_mobile_lcdc_clk_on(struct sh_mobile_lcdc_priv *priv)
342 {
343 if (atomic_inc_and_test(&priv->hw_usecnt)) {
344 if (priv->dot_clk)
345 clk_prepare_enable(priv->dot_clk);
346 pm_runtime_get_sync(priv->dev);
347 }
348 }
349
350 static void sh_mobile_lcdc_clk_off(struct sh_mobile_lcdc_priv *priv)
351 {
352 if (atomic_sub_return(1, &priv->hw_usecnt) == -1) {
353 pm_runtime_put(priv->dev);
354 if (priv->dot_clk)
355 clk_disable_unprepare(priv->dot_clk);
356 }
357 }
358
359 static int sh_mobile_lcdc_setup_clocks(struct sh_mobile_lcdc_priv *priv,
360 int clock_source)
361 {
362 struct clk *clk;
363 char *str;
364
365 switch (clock_source) {
366 case LCDC_CLK_BUS:
367 str = "bus_clk";
368 priv->lddckr = LDDCKR_ICKSEL_BUS;
369 break;
370 case LCDC_CLK_PERIPHERAL:
371 str = "peripheral_clk";
372 priv->lddckr = LDDCKR_ICKSEL_MIPI;
373 break;
374 case LCDC_CLK_EXTERNAL:
375 str = NULL;
376 priv->lddckr = LDDCKR_ICKSEL_HDMI;
377 break;
378 default:
379 return -EINVAL;
380 }
381
382 if (str == NULL)
383 return 0;
384
385 clk = clk_get(priv->dev, str);
386 if (IS_ERR(clk)) {
387 dev_err(priv->dev, "cannot get dot clock %s\n", str);
388 return PTR_ERR(clk);
389 }
390
391 priv->dot_clk = clk;
392 return 0;
393 }
394
395 /* -----------------------------------------------------------------------------
396 * Display, panel and deferred I/O
397 */
398
399 static void lcdc_sys_write_index(void *handle, unsigned long data)
400 {
401 struct sh_mobile_lcdc_chan *ch = handle;
402
403 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT);
404 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
405 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
406 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
407 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
408 }
409
410 static void lcdc_sys_write_data(void *handle, unsigned long data)
411 {
412 struct sh_mobile_lcdc_chan *ch = handle;
413
414 lcdc_write(ch->lcdc, _LDDWD0R, data | LDDWDxR_WDACT | LDDWDxR_RSW);
415 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
416 lcdc_write(ch->lcdc, _LDDWAR, LDDWAR_WA |
417 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
418 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
419 }
420
421 static unsigned long lcdc_sys_read_data(void *handle)
422 {
423 struct sh_mobile_lcdc_chan *ch = handle;
424
425 lcdc_write(ch->lcdc, _LDDRDR, LDDRDR_RSR);
426 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
427 lcdc_write(ch->lcdc, _LDDRAR, LDDRAR_RA |
428 (lcdc_chan_is_sublcd(ch) ? 2 : 0));
429 udelay(1);
430 lcdc_wait_bit(ch->lcdc, _LDSR, LDSR_AS, 0);
431
432 return lcdc_read(ch->lcdc, _LDDRDR) & LDDRDR_DRD_MASK;
433 }
434
435 static struct sh_mobile_lcdc_sys_bus_ops sh_mobile_lcdc_sys_bus_ops = {
436 .write_index = lcdc_sys_write_index,
437 .write_data = lcdc_sys_write_data,
438 .read_data = lcdc_sys_read_data,
439 };
440
441 static int sh_mobile_lcdc_sginit(struct fb_info *info,
442 struct list_head *pagelist)
443 {
444 struct sh_mobile_lcdc_chan *ch = info->par;
445 unsigned int nr_pages_max = ch->fb_size >> PAGE_SHIFT;
446 struct page *page;
447 int nr_pages = 0;
448
449 sg_init_table(ch->sglist, nr_pages_max);
450
451 list_for_each_entry(page, pagelist, lru)
452 sg_set_page(&ch->sglist[nr_pages++], page, PAGE_SIZE, 0);
453
454 return nr_pages;
455 }
456
457 static void sh_mobile_lcdc_deferred_io(struct fb_info *info,
458 struct list_head *pagelist)
459 {
460 struct sh_mobile_lcdc_chan *ch = info->par;
461 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
462
463 /* enable clocks before accessing hardware */
464 sh_mobile_lcdc_clk_on(ch->lcdc);
465
466 /*
467 * It's possible to get here without anything on the pagelist via
468 * sh_mobile_lcdc_deferred_io_touch() or via a userspace fsync()
469 * invocation. In the former case, the acceleration routines are
470 * stepped in to when using the framebuffer console causing the
471 * workqueue to be scheduled without any dirty pages on the list.
472 *
473 * Despite this, a panel update is still needed given that the
474 * acceleration routines have their own methods for writing in
475 * that still need to be updated.
476 *
477 * The fsync() and empty pagelist case could be optimized for,
478 * but we don't bother, as any application exhibiting such
479 * behaviour is fundamentally broken anyways.
480 */
481 if (!list_empty(pagelist)) {
482 unsigned int nr_pages = sh_mobile_lcdc_sginit(info, pagelist);
483
484 /* trigger panel update */
485 dma_map_sg(ch->lcdc->dev, ch->sglist, nr_pages, DMA_TO_DEVICE);
486 if (panel->start_transfer)
487 panel->start_transfer(ch, &sh_mobile_lcdc_sys_bus_ops);
488 lcdc_write_chan(ch, LDSM2R, LDSM2R_OSTRG);
489 dma_unmap_sg(ch->lcdc->dev, ch->sglist, nr_pages,
490 DMA_TO_DEVICE);
491 } else {
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 }
496 }
497
498 static void sh_mobile_lcdc_deferred_io_touch(struct fb_info *info)
499 {
500 struct fb_deferred_io *fbdefio = info->fbdefio;
501
502 if (fbdefio)
503 schedule_delayed_work(&info->deferred_work, fbdefio->delay);
504 }
505
506 static void sh_mobile_lcdc_display_on(struct sh_mobile_lcdc_chan *ch)
507 {
508 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
509
510 if (ch->tx_dev) {
511 int ret;
512
513 ret = ch->tx_dev->ops->display_on(ch->tx_dev);
514 if (ret < 0)
515 return;
516
517 if (ret == SH_MOBILE_LCDC_DISPLAY_DISCONNECTED)
518 ch->info->state = FBINFO_STATE_SUSPENDED;
519 }
520
521 /* HDMI must be enabled before LCDC configuration */
522 if (panel->display_on)
523 panel->display_on();
524 }
525
526 static void sh_mobile_lcdc_display_off(struct sh_mobile_lcdc_chan *ch)
527 {
528 const struct sh_mobile_lcdc_panel_cfg *panel = &ch->cfg->panel_cfg;
529
530 if (panel->display_off)
531 panel->display_off();
532
533 if (ch->tx_dev)
534 ch->tx_dev->ops->display_off(ch->tx_dev);
535 }
536
537 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
538 struct fb_info *info);
539
540 /* -----------------------------------------------------------------------------
541 * Format helpers
542 */
543
544 struct sh_mobile_lcdc_format_info {
545 u32 fourcc;
546 unsigned int bpp;
547 bool yuv;
548 u32 lddfr;
549 };
550
551 static const struct sh_mobile_lcdc_format_info sh_mobile_format_infos[] = {
552 {
553 .fourcc = V4L2_PIX_FMT_RGB565,
554 .bpp = 16,
555 .yuv = false,
556 .lddfr = LDDFR_PKF_RGB16,
557 }, {
558 .fourcc = V4L2_PIX_FMT_BGR24,
559 .bpp = 24,
560 .yuv = false,
561 .lddfr = LDDFR_PKF_RGB24,
562 }, {
563 .fourcc = V4L2_PIX_FMT_BGR32,
564 .bpp = 32,
565 .yuv = false,
566 .lddfr = LDDFR_PKF_ARGB32,
567 }, {
568 .fourcc = V4L2_PIX_FMT_NV12,
569 .bpp = 12,
570 .yuv = true,
571 .lddfr = LDDFR_CC | LDDFR_YF_420,
572 }, {
573 .fourcc = V4L2_PIX_FMT_NV21,
574 .bpp = 12,
575 .yuv = true,
576 .lddfr = LDDFR_CC | LDDFR_YF_420,
577 }, {
578 .fourcc = V4L2_PIX_FMT_NV16,
579 .bpp = 16,
580 .yuv = true,
581 .lddfr = LDDFR_CC | LDDFR_YF_422,
582 }, {
583 .fourcc = V4L2_PIX_FMT_NV61,
584 .bpp = 16,
585 .yuv = true,
586 .lddfr = LDDFR_CC | LDDFR_YF_422,
587 }, {
588 .fourcc = V4L2_PIX_FMT_NV24,
589 .bpp = 24,
590 .yuv = true,
591 .lddfr = LDDFR_CC | LDDFR_YF_444,
592 }, {
593 .fourcc = V4L2_PIX_FMT_NV42,
594 .bpp = 24,
595 .yuv = true,
596 .lddfr = LDDFR_CC | LDDFR_YF_444,
597 },
598 };
599
600 static const struct sh_mobile_lcdc_format_info *
601 sh_mobile_format_info(u32 fourcc)
602 {
603 unsigned int i;
604
605 for (i = 0; i < ARRAY_SIZE(sh_mobile_format_infos); ++i) {
606 if (sh_mobile_format_infos[i].fourcc == fourcc)
607 return &sh_mobile_format_infos[i];
608 }
609
610 return NULL;
611 }
612
613 static int sh_mobile_format_fourcc(const struct fb_var_screeninfo *var)
614 {
615 if (var->grayscale > 1)
616 return var->grayscale;
617
618 switch (var->bits_per_pixel) {
619 case 16:
620 return V4L2_PIX_FMT_RGB565;
621 case 24:
622 return V4L2_PIX_FMT_BGR24;
623 case 32:
624 return V4L2_PIX_FMT_BGR32;
625 default:
626 return 0;
627 }
628 }
629
630 static int sh_mobile_format_is_fourcc(const struct fb_var_screeninfo *var)
631 {
632 return var->grayscale > 1;
633 }
634
635 /* -----------------------------------------------------------------------------
636 * Start, stop and IRQ
637 */
638
639 static irqreturn_t sh_mobile_lcdc_irq(int irq, void *data)
640 {
641 struct sh_mobile_lcdc_priv *priv = data;
642 struct sh_mobile_lcdc_chan *ch;
643 unsigned long ldintr;
644 int is_sub;
645 int k;
646
647 /* Acknowledge interrupts and disable further VSYNC End IRQs. */
648 ldintr = lcdc_read(priv, _LDINTR);
649 lcdc_write(priv, _LDINTR, (ldintr ^ LDINTR_STATUS_MASK) & ~LDINTR_VEE);
650
651 /* figure out if this interrupt is for main or sub lcd */
652 is_sub = (lcdc_read(priv, _LDSR) & LDSR_MSS) ? 1 : 0;
653
654 /* wake up channel and disable clocks */
655 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
656 ch = &priv->ch[k];
657
658 if (!ch->enabled)
659 continue;
660
661 /* Frame End */
662 if (ldintr & LDINTR_FS) {
663 if (is_sub == lcdc_chan_is_sublcd(ch)) {
664 ch->frame_end = 1;
665 wake_up(&ch->frame_end_wait);
666
667 sh_mobile_lcdc_clk_off(priv);
668 }
669 }
670
671 /* VSYNC End */
672 if (ldintr & LDINTR_VES)
673 complete(&ch->vsync_completion);
674 }
675
676 return IRQ_HANDLED;
677 }
678
679 static int sh_mobile_lcdc_wait_for_vsync(struct sh_mobile_lcdc_chan *ch)
680 {
681 unsigned long ldintr;
682 int ret;
683
684 /* Enable VSync End interrupt and be careful not to acknowledge any
685 * pending interrupt.
686 */
687 ldintr = lcdc_read(ch->lcdc, _LDINTR);
688 ldintr |= LDINTR_VEE | LDINTR_STATUS_MASK;
689 lcdc_write(ch->lcdc, _LDINTR, ldintr);
690
691 ret = wait_for_completion_interruptible_timeout(&ch->vsync_completion,
692 msecs_to_jiffies(100));
693 if (!ret)
694 return -ETIMEDOUT;
695
696 return 0;
697 }
698
699 static void sh_mobile_lcdc_start_stop(struct sh_mobile_lcdc_priv *priv,
700 int start)
701 {
702 unsigned long tmp = lcdc_read(priv, _LDCNT2R);
703 int k;
704
705 /* start or stop the lcdc */
706 if (start)
707 lcdc_write(priv, _LDCNT2R, tmp | LDCNT2R_DO);
708 else
709 lcdc_write(priv, _LDCNT2R, tmp & ~LDCNT2R_DO);
710
711 /* wait until power is applied/stopped on all channels */
712 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
713 if (lcdc_read(priv, _LDCNT2R) & priv->ch[k].enabled)
714 while (1) {
715 tmp = lcdc_read_chan(&priv->ch[k], LDPMR)
716 & LDPMR_LPS;
717 if (start && tmp == LDPMR_LPS)
718 break;
719 if (!start && tmp == 0)
720 break;
721 cpu_relax();
722 }
723
724 if (!start)
725 lcdc_write(priv, _LDDCKSTPR, 1); /* stop dotclock */
726 }
727
728 static void sh_mobile_lcdc_geometry(struct sh_mobile_lcdc_chan *ch)
729 {
730 const struct fb_var_screeninfo *var = &ch->info->var;
731 const struct fb_videomode *mode = &ch->display.mode;
732 unsigned long h_total, hsync_pos, display_h_total;
733 u32 tmp;
734
735 tmp = ch->ldmt1r_value;
736 tmp |= (var->sync & FB_SYNC_VERT_HIGH_ACT) ? 0 : LDMT1R_VPOL;
737 tmp |= (var->sync & FB_SYNC_HOR_HIGH_ACT) ? 0 : LDMT1R_HPOL;
738 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWPOL) ? LDMT1R_DWPOL : 0;
739 tmp |= (ch->cfg->flags & LCDC_FLAGS_DIPOL) ? LDMT1R_DIPOL : 0;
740 tmp |= (ch->cfg->flags & LCDC_FLAGS_DAPOL) ? LDMT1R_DAPOL : 0;
741 tmp |= (ch->cfg->flags & LCDC_FLAGS_HSCNT) ? LDMT1R_HSCNT : 0;
742 tmp |= (ch->cfg->flags & LCDC_FLAGS_DWCNT) ? LDMT1R_DWCNT : 0;
743 lcdc_write_chan(ch, LDMT1R, tmp);
744
745 /* setup SYS bus */
746 lcdc_write_chan(ch, LDMT2R, ch->cfg->sys_bus_cfg.ldmt2r);
747 lcdc_write_chan(ch, LDMT3R, ch->cfg->sys_bus_cfg.ldmt3r);
748
749 /* horizontal configuration */
750 h_total = mode->xres + mode->hsync_len + mode->left_margin
751 + mode->right_margin;
752 tmp = h_total / 8; /* HTCN */
753 tmp |= (min(mode->xres, ch->xres) / 8) << 16; /* HDCN */
754 lcdc_write_chan(ch, LDHCNR, tmp);
755
756 hsync_pos = mode->xres + mode->right_margin;
757 tmp = hsync_pos / 8; /* HSYNP */
758 tmp |= (mode->hsync_len / 8) << 16; /* HSYNW */
759 lcdc_write_chan(ch, LDHSYNR, tmp);
760
761 /* vertical configuration */
762 tmp = mode->yres + mode->vsync_len + mode->upper_margin
763 + mode->lower_margin; /* VTLN */
764 tmp |= min(mode->yres, ch->yres) << 16; /* VDLN */
765 lcdc_write_chan(ch, LDVLNR, tmp);
766
767 tmp = mode->yres + mode->lower_margin; /* VSYNP */
768 tmp |= mode->vsync_len << 16; /* VSYNW */
769 lcdc_write_chan(ch, LDVSYNR, tmp);
770
771 /* Adjust horizontal synchronisation for HDMI */
772 display_h_total = mode->xres + mode->hsync_len + mode->left_margin
773 + mode->right_margin;
774 tmp = ((mode->xres & 7) << 24) | ((display_h_total & 7) << 16)
775 | ((mode->hsync_len & 7) << 8) | (hsync_pos & 7);
776 lcdc_write_chan(ch, LDHAJR, tmp);
777 lcdc_write_chan_mirror(ch, LDHAJR, tmp);
778 }
779
780 static void sh_mobile_lcdc_overlay_setup(struct sh_mobile_lcdc_overlay *ovl)
781 {
782 u32 format = 0;
783
784 if (!ovl->enabled) {
785 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
786 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), 0);
787 lcdc_write(ovl->channel->lcdc, LDBCR,
788 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
789 return;
790 }
791
792 ovl->base_addr_y = ovl->dma_handle;
793 ovl->base_addr_c = ovl->dma_handle
794 + ovl->xres_virtual * ovl->yres_virtual;
795
796 switch (ovl->mode) {
797 case LCDC_OVERLAY_BLEND:
798 format = LDBBSIFR_EN | (ovl->alpha << LDBBSIFR_LAY_SHIFT);
799 break;
800
801 case LCDC_OVERLAY_ROP3:
802 format = LDBBSIFR_EN | LDBBSIFR_BRSEL
803 | (ovl->rop3 << LDBBSIFR_ROP3_SHIFT);
804 break;
805 }
806
807 switch (ovl->format->fourcc) {
808 case V4L2_PIX_FMT_RGB565:
809 case V4L2_PIX_FMT_NV21:
810 case V4L2_PIX_FMT_NV61:
811 case V4L2_PIX_FMT_NV42:
812 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW;
813 break;
814 case V4L2_PIX_FMT_BGR24:
815 case V4L2_PIX_FMT_NV12:
816 case V4L2_PIX_FMT_NV16:
817 case V4L2_PIX_FMT_NV24:
818 format |= LDBBSIFR_SWPL | LDBBSIFR_SWPW | LDBBSIFR_SWPB;
819 break;
820 case V4L2_PIX_FMT_BGR32:
821 default:
822 format |= LDBBSIFR_SWPL;
823 break;
824 }
825
826 switch (ovl->format->fourcc) {
827 case V4L2_PIX_FMT_RGB565:
828 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB16;
829 break;
830 case V4L2_PIX_FMT_BGR24:
831 format |= LDBBSIFR_AL_1 | LDBBSIFR_RY | LDBBSIFR_RPKF_RGB24;
832 break;
833 case V4L2_PIX_FMT_BGR32:
834 format |= LDBBSIFR_AL_PK | LDBBSIFR_RY | LDDFR_PKF_ARGB32;
835 break;
836 case V4L2_PIX_FMT_NV12:
837 case V4L2_PIX_FMT_NV21:
838 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_420;
839 break;
840 case V4L2_PIX_FMT_NV16:
841 case V4L2_PIX_FMT_NV61:
842 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_422;
843 break;
844 case V4L2_PIX_FMT_NV24:
845 case V4L2_PIX_FMT_NV42:
846 format |= LDBBSIFR_AL_1 | LDBBSIFR_CHRR_444;
847 break;
848 }
849
850 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
851
852 lcdc_write_overlay(ovl, LDBnBSIFR(ovl->index), format);
853
854 lcdc_write_overlay(ovl, LDBnBSSZR(ovl->index),
855 (ovl->yres << LDBBSSZR_BVSS_SHIFT) |
856 (ovl->xres << LDBBSSZR_BHSS_SHIFT));
857 lcdc_write_overlay(ovl, LDBnBLOCR(ovl->index),
858 (ovl->pos_y << LDBBLOCR_CVLC_SHIFT) |
859 (ovl->pos_x << LDBBLOCR_CHLC_SHIFT));
860 lcdc_write_overlay(ovl, LDBnBSMWR(ovl->index),
861 ovl->pitch << LDBBSMWR_BSMW_SHIFT);
862
863 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
864 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
865
866 lcdc_write(ovl->channel->lcdc, LDBCR,
867 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
868 }
869
870 /*
871 * __sh_mobile_lcdc_start - Configure and start the LCDC
872 * @priv: LCDC device
873 *
874 * Configure all enabled channels and start the LCDC device. All external
875 * devices (clocks, MERAM, panels, ...) are not touched by this function.
876 */
877 static void __sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
878 {
879 struct sh_mobile_lcdc_chan *ch;
880 unsigned long tmp;
881 int k, m;
882
883 /* Enable LCDC channels. Read data from external memory, avoid using the
884 * BEU for now.
885 */
886 lcdc_write(priv, _LDCNT2R, priv->ch[0].enabled | priv->ch[1].enabled);
887
888 /* Stop the LCDC first and disable all interrupts. */
889 sh_mobile_lcdc_start_stop(priv, 0);
890 lcdc_write(priv, _LDINTR, 0);
891
892 /* Configure power supply, dot clocks and start them. */
893 tmp = priv->lddckr;
894 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
895 ch = &priv->ch[k];
896 if (!ch->enabled)
897 continue;
898
899 /* Power supply */
900 lcdc_write_chan(ch, LDPMR, 0);
901
902 m = ch->cfg->clock_divider;
903 if (!m)
904 continue;
905
906 /* FIXME: sh7724 can only use 42, 48, 54 and 60 for the divider
907 * denominator.
908 */
909 lcdc_write_chan(ch, LDDCKPAT1R, 0);
910 lcdc_write_chan(ch, LDDCKPAT2R, (1 << (m/2)) - 1);
911
912 if (m == 1)
913 m = LDDCKR_MOSEL;
914 tmp |= m << (lcdc_chan_is_sublcd(ch) ? 8 : 0);
915 }
916
917 lcdc_write(priv, _LDDCKR, tmp);
918 lcdc_write(priv, _LDDCKSTPR, 0);
919 lcdc_wait_bit(priv, _LDDCKSTPR, ~0, 0);
920
921 /* Setup geometry, format, frame buffer memory and operation mode. */
922 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
923 ch = &priv->ch[k];
924 if (!ch->enabled)
925 continue;
926
927 sh_mobile_lcdc_geometry(ch);
928
929 tmp = ch->format->lddfr;
930
931 if (ch->format->yuv) {
932 switch (ch->colorspace) {
933 case V4L2_COLORSPACE_REC709:
934 tmp |= LDDFR_CF1;
935 break;
936 case V4L2_COLORSPACE_JPEG:
937 tmp |= LDDFR_CF0;
938 break;
939 }
940 }
941
942 lcdc_write_chan(ch, LDDFR, tmp);
943 lcdc_write_chan(ch, LDMLSR, ch->line_size);
944 lcdc_write_chan(ch, LDSA1R, ch->base_addr_y);
945 if (ch->format->yuv)
946 lcdc_write_chan(ch, LDSA2R, ch->base_addr_c);
947
948 /* When using deferred I/O mode, configure the LCDC for one-shot
949 * operation and enable the frame end interrupt. Otherwise use
950 * continuous read mode.
951 */
952 if (ch->ldmt1r_value & LDMT1R_IFM &&
953 ch->cfg->sys_bus_cfg.deferred_io_msec) {
954 lcdc_write_chan(ch, LDSM1R, LDSM1R_OS);
955 lcdc_write(priv, _LDINTR, LDINTR_FE);
956 } else {
957 lcdc_write_chan(ch, LDSM1R, 0);
958 }
959 }
960
961 /* Word and long word swap. */
962 switch (priv->ch[0].format->fourcc) {
963 case V4L2_PIX_FMT_RGB565:
964 case V4L2_PIX_FMT_NV21:
965 case V4L2_PIX_FMT_NV61:
966 case V4L2_PIX_FMT_NV42:
967 tmp = LDDDSR_LS | LDDDSR_WS;
968 break;
969 case V4L2_PIX_FMT_BGR24:
970 case V4L2_PIX_FMT_NV12:
971 case V4L2_PIX_FMT_NV16:
972 case V4L2_PIX_FMT_NV24:
973 tmp = LDDDSR_LS | LDDDSR_WS | LDDDSR_BS;
974 break;
975 case V4L2_PIX_FMT_BGR32:
976 default:
977 tmp = LDDDSR_LS;
978 break;
979 }
980 lcdc_write(priv, _LDDDSR, tmp);
981
982 /* Enable the display output. */
983 lcdc_write(priv, _LDCNT1R, LDCNT1R_DE);
984 sh_mobile_lcdc_start_stop(priv, 1);
985 priv->started = 1;
986 }
987
988 static int sh_mobile_lcdc_start(struct sh_mobile_lcdc_priv *priv)
989 {
990 struct sh_mobile_lcdc_chan *ch;
991 unsigned long tmp;
992 int ret;
993 int k;
994
995 /* enable clocks before accessing the hardware */
996 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
997 if (priv->ch[k].enabled)
998 sh_mobile_lcdc_clk_on(priv);
999 }
1000
1001 /* reset */
1002 lcdc_write(priv, _LDCNT2R, lcdc_read(priv, _LDCNT2R) | LDCNT2R_BR);
1003 lcdc_wait_bit(priv, _LDCNT2R, LDCNT2R_BR, 0);
1004
1005 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1006 const struct sh_mobile_lcdc_panel_cfg *panel;
1007
1008 ch = &priv->ch[k];
1009 if (!ch->enabled)
1010 continue;
1011
1012 panel = &ch->cfg->panel_cfg;
1013 if (panel->setup_sys) {
1014 ret = panel->setup_sys(ch, &sh_mobile_lcdc_sys_bus_ops);
1015 if (ret)
1016 return ret;
1017 }
1018 }
1019
1020 /* Compute frame buffer base address and pitch for each channel. */
1021 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1022 ch = &priv->ch[k];
1023 if (!ch->enabled)
1024 continue;
1025
1026 ch->base_addr_y = ch->dma_handle;
1027 ch->base_addr_c = ch->dma_handle
1028 + ch->xres_virtual * ch->yres_virtual;
1029 ch->line_size = ch->pitch;
1030 }
1031
1032 for (k = 0; k < ARRAY_SIZE(priv->overlays); ++k) {
1033 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[k];
1034 sh_mobile_lcdc_overlay_setup(ovl);
1035 }
1036
1037 /* Start the LCDC. */
1038 __sh_mobile_lcdc_start(priv);
1039
1040 /* Setup deferred I/O, tell the board code to enable the panels, and
1041 * turn backlight on.
1042 */
1043 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1044 ch = &priv->ch[k];
1045 if (!ch->enabled)
1046 continue;
1047
1048 tmp = ch->cfg->sys_bus_cfg.deferred_io_msec;
1049 if (ch->ldmt1r_value & LDMT1R_IFM && tmp) {
1050 ch->defio.deferred_io = sh_mobile_lcdc_deferred_io;
1051 ch->defio.delay = msecs_to_jiffies(tmp);
1052 ch->info->fbdefio = &ch->defio;
1053 fb_deferred_io_init(ch->info);
1054 }
1055
1056 sh_mobile_lcdc_display_on(ch);
1057
1058 if (ch->bl) {
1059 ch->bl->props.power = FB_BLANK_UNBLANK;
1060 backlight_update_status(ch->bl);
1061 }
1062 }
1063
1064 return 0;
1065 }
1066
1067 static void sh_mobile_lcdc_stop(struct sh_mobile_lcdc_priv *priv)
1068 {
1069 struct sh_mobile_lcdc_chan *ch;
1070 int k;
1071
1072 /* clean up deferred io and ask board code to disable panel */
1073 for (k = 0; k < ARRAY_SIZE(priv->ch); k++) {
1074 ch = &priv->ch[k];
1075 if (!ch->enabled)
1076 continue;
1077
1078 /* deferred io mode:
1079 * flush frame, and wait for frame end interrupt
1080 * clean up deferred io and enable clock
1081 */
1082 if (ch->info && ch->info->fbdefio) {
1083 ch->frame_end = 0;
1084 schedule_delayed_work(&ch->info->deferred_work, 0);
1085 wait_event(ch->frame_end_wait, ch->frame_end);
1086 fb_deferred_io_cleanup(ch->info);
1087 ch->info->fbdefio = NULL;
1088 sh_mobile_lcdc_clk_on(priv);
1089 }
1090
1091 if (ch->bl) {
1092 ch->bl->props.power = FB_BLANK_POWERDOWN;
1093 backlight_update_status(ch->bl);
1094 }
1095
1096 sh_mobile_lcdc_display_off(ch);
1097 }
1098
1099 /* stop the lcdc */
1100 if (priv->started) {
1101 sh_mobile_lcdc_start_stop(priv, 0);
1102 priv->started = 0;
1103 }
1104
1105 /* stop clocks */
1106 for (k = 0; k < ARRAY_SIZE(priv->ch); k++)
1107 if (priv->ch[k].enabled)
1108 sh_mobile_lcdc_clk_off(priv);
1109 }
1110
1111 static int __sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1112 struct fb_info *info)
1113 {
1114 if (var->xres > MAX_XRES || var->yres > MAX_YRES)
1115 return -EINVAL;
1116
1117 /* Make sure the virtual resolution is at least as big as the visible
1118 * resolution.
1119 */
1120 if (var->xres_virtual < var->xres)
1121 var->xres_virtual = var->xres;
1122 if (var->yres_virtual < var->yres)
1123 var->yres_virtual = var->yres;
1124
1125 if (sh_mobile_format_is_fourcc(var)) {
1126 const struct sh_mobile_lcdc_format_info *format;
1127
1128 format = sh_mobile_format_info(var->grayscale);
1129 if (format == NULL)
1130 return -EINVAL;
1131 var->bits_per_pixel = format->bpp;
1132
1133 /* Default to RGB and JPEG color-spaces for RGB and YUV formats
1134 * respectively.
1135 */
1136 if (!format->yuv)
1137 var->colorspace = V4L2_COLORSPACE_SRGB;
1138 else if (var->colorspace != V4L2_COLORSPACE_REC709)
1139 var->colorspace = V4L2_COLORSPACE_JPEG;
1140 } else {
1141 if (var->bits_per_pixel <= 16) { /* RGB 565 */
1142 var->bits_per_pixel = 16;
1143 var->red.offset = 11;
1144 var->red.length = 5;
1145 var->green.offset = 5;
1146 var->green.length = 6;
1147 var->blue.offset = 0;
1148 var->blue.length = 5;
1149 var->transp.offset = 0;
1150 var->transp.length = 0;
1151 } else if (var->bits_per_pixel <= 24) { /* RGB 888 */
1152 var->bits_per_pixel = 24;
1153 var->red.offset = 16;
1154 var->red.length = 8;
1155 var->green.offset = 8;
1156 var->green.length = 8;
1157 var->blue.offset = 0;
1158 var->blue.length = 8;
1159 var->transp.offset = 0;
1160 var->transp.length = 0;
1161 } else if (var->bits_per_pixel <= 32) { /* RGBA 888 */
1162 var->bits_per_pixel = 32;
1163 var->red.offset = 16;
1164 var->red.length = 8;
1165 var->green.offset = 8;
1166 var->green.length = 8;
1167 var->blue.offset = 0;
1168 var->blue.length = 8;
1169 var->transp.offset = 24;
1170 var->transp.length = 8;
1171 } else
1172 return -EINVAL;
1173
1174 var->red.msb_right = 0;
1175 var->green.msb_right = 0;
1176 var->blue.msb_right = 0;
1177 var->transp.msb_right = 0;
1178 }
1179
1180 /* Make sure we don't exceed our allocated memory. */
1181 if (var->xres_virtual * var->yres_virtual * var->bits_per_pixel / 8 >
1182 info->fix.smem_len)
1183 return -EINVAL;
1184
1185 return 0;
1186 }
1187
1188 /* -----------------------------------------------------------------------------
1189 * Frame buffer operations - Overlays
1190 */
1191
1192 static ssize_t
1193 overlay_alpha_show(struct device *dev, struct device_attribute *attr, char *buf)
1194 {
1195 struct fb_info *info = dev_get_drvdata(dev);
1196 struct sh_mobile_lcdc_overlay *ovl = info->par;
1197
1198 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->alpha);
1199 }
1200
1201 static ssize_t
1202 overlay_alpha_store(struct device *dev, struct device_attribute *attr,
1203 const char *buf, size_t count)
1204 {
1205 struct fb_info *info = dev_get_drvdata(dev);
1206 struct sh_mobile_lcdc_overlay *ovl = info->par;
1207 unsigned int alpha;
1208 char *endp;
1209
1210 alpha = simple_strtoul(buf, &endp, 10);
1211 if (isspace(*endp))
1212 endp++;
1213
1214 if (endp - buf != count)
1215 return -EINVAL;
1216
1217 if (alpha > 255)
1218 return -EINVAL;
1219
1220 if (ovl->alpha != alpha) {
1221 ovl->alpha = alpha;
1222
1223 if (ovl->mode == LCDC_OVERLAY_BLEND && ovl->enabled)
1224 sh_mobile_lcdc_overlay_setup(ovl);
1225 }
1226
1227 return count;
1228 }
1229
1230 static ssize_t
1231 overlay_mode_show(struct device *dev, struct device_attribute *attr, char *buf)
1232 {
1233 struct fb_info *info = dev_get_drvdata(dev);
1234 struct sh_mobile_lcdc_overlay *ovl = info->par;
1235
1236 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->mode);
1237 }
1238
1239 static ssize_t
1240 overlay_mode_store(struct device *dev, struct device_attribute *attr,
1241 const char *buf, size_t count)
1242 {
1243 struct fb_info *info = dev_get_drvdata(dev);
1244 struct sh_mobile_lcdc_overlay *ovl = info->par;
1245 unsigned int mode;
1246 char *endp;
1247
1248 mode = simple_strtoul(buf, &endp, 10);
1249 if (isspace(*endp))
1250 endp++;
1251
1252 if (endp - buf != count)
1253 return -EINVAL;
1254
1255 if (mode != LCDC_OVERLAY_BLEND && mode != LCDC_OVERLAY_ROP3)
1256 return -EINVAL;
1257
1258 if (ovl->mode != mode) {
1259 ovl->mode = mode;
1260
1261 if (ovl->enabled)
1262 sh_mobile_lcdc_overlay_setup(ovl);
1263 }
1264
1265 return count;
1266 }
1267
1268 static ssize_t
1269 overlay_position_show(struct device *dev, struct device_attribute *attr,
1270 char *buf)
1271 {
1272 struct fb_info *info = dev_get_drvdata(dev);
1273 struct sh_mobile_lcdc_overlay *ovl = info->par;
1274
1275 return scnprintf(buf, PAGE_SIZE, "%d,%d\n", ovl->pos_x, ovl->pos_y);
1276 }
1277
1278 static ssize_t
1279 overlay_position_store(struct device *dev, struct device_attribute *attr,
1280 const char *buf, size_t count)
1281 {
1282 struct fb_info *info = dev_get_drvdata(dev);
1283 struct sh_mobile_lcdc_overlay *ovl = info->par;
1284 char *endp;
1285 int pos_x;
1286 int pos_y;
1287
1288 pos_x = simple_strtol(buf, &endp, 10);
1289 if (*endp != ',')
1290 return -EINVAL;
1291
1292 pos_y = simple_strtol(endp + 1, &endp, 10);
1293 if (isspace(*endp))
1294 endp++;
1295
1296 if (endp - buf != count)
1297 return -EINVAL;
1298
1299 if (ovl->pos_x != pos_x || ovl->pos_y != pos_y) {
1300 ovl->pos_x = pos_x;
1301 ovl->pos_y = pos_y;
1302
1303 if (ovl->enabled)
1304 sh_mobile_lcdc_overlay_setup(ovl);
1305 }
1306
1307 return count;
1308 }
1309
1310 static ssize_t
1311 overlay_rop3_show(struct device *dev, struct device_attribute *attr, char *buf)
1312 {
1313 struct fb_info *info = dev_get_drvdata(dev);
1314 struct sh_mobile_lcdc_overlay *ovl = info->par;
1315
1316 return scnprintf(buf, PAGE_SIZE, "%u\n", ovl->rop3);
1317 }
1318
1319 static ssize_t
1320 overlay_rop3_store(struct device *dev, struct device_attribute *attr,
1321 const char *buf, size_t count)
1322 {
1323 struct fb_info *info = dev_get_drvdata(dev);
1324 struct sh_mobile_lcdc_overlay *ovl = info->par;
1325 unsigned int rop3;
1326 char *endp;
1327
1328 rop3 = simple_strtoul(buf, &endp, 10);
1329 if (isspace(*endp))
1330 endp++;
1331
1332 if (endp - buf != count)
1333 return -EINVAL;
1334
1335 if (rop3 > 255)
1336 return -EINVAL;
1337
1338 if (ovl->rop3 != rop3) {
1339 ovl->rop3 = rop3;
1340
1341 if (ovl->mode == LCDC_OVERLAY_ROP3 && ovl->enabled)
1342 sh_mobile_lcdc_overlay_setup(ovl);
1343 }
1344
1345 return count;
1346 }
1347
1348 static const struct device_attribute overlay_sysfs_attrs[] = {
1349 __ATTR(ovl_alpha, S_IRUGO|S_IWUSR,
1350 overlay_alpha_show, overlay_alpha_store),
1351 __ATTR(ovl_mode, S_IRUGO|S_IWUSR,
1352 overlay_mode_show, overlay_mode_store),
1353 __ATTR(ovl_position, S_IRUGO|S_IWUSR,
1354 overlay_position_show, overlay_position_store),
1355 __ATTR(ovl_rop3, S_IRUGO|S_IWUSR,
1356 overlay_rop3_show, overlay_rop3_store),
1357 };
1358
1359 static const struct fb_fix_screeninfo sh_mobile_lcdc_overlay_fix = {
1360 .id = "SH Mobile LCDC",
1361 .type = FB_TYPE_PACKED_PIXELS,
1362 .visual = FB_VISUAL_TRUECOLOR,
1363 .accel = FB_ACCEL_NONE,
1364 .xpanstep = 1,
1365 .ypanstep = 1,
1366 .ywrapstep = 0,
1367 .capabilities = FB_CAP_FOURCC,
1368 };
1369
1370 static int sh_mobile_lcdc_overlay_pan(struct fb_var_screeninfo *var,
1371 struct fb_info *info)
1372 {
1373 struct sh_mobile_lcdc_overlay *ovl = info->par;
1374 unsigned long base_addr_y;
1375 unsigned long base_addr_c;
1376 unsigned long y_offset;
1377 unsigned long c_offset;
1378
1379 if (!ovl->format->yuv) {
1380 y_offset = (var->yoffset * ovl->xres_virtual + var->xoffset)
1381 * ovl->format->bpp / 8;
1382 c_offset = 0;
1383 } else {
1384 unsigned int xsub = ovl->format->bpp < 24 ? 2 : 1;
1385 unsigned int ysub = ovl->format->bpp < 16 ? 2 : 1;
1386
1387 y_offset = var->yoffset * ovl->xres_virtual + var->xoffset;
1388 c_offset = var->yoffset / ysub * ovl->xres_virtual * 2 / xsub
1389 + var->xoffset * 2 / xsub;
1390 }
1391
1392 /* If the Y offset hasn't changed, the C offset hasn't either. There's
1393 * nothing to do in that case.
1394 */
1395 if (y_offset == ovl->pan_y_offset)
1396 return 0;
1397
1398 /* Set the source address for the next refresh */
1399 base_addr_y = ovl->dma_handle + y_offset;
1400 base_addr_c = ovl->dma_handle + ovl->xres_virtual * ovl->yres_virtual
1401 + c_offset;
1402
1403 ovl->base_addr_y = base_addr_y;
1404 ovl->base_addr_c = base_addr_c;
1405 ovl->pan_y_offset = y_offset;
1406
1407 lcdc_write(ovl->channel->lcdc, LDBCR, LDBCR_UPC(ovl->index));
1408
1409 lcdc_write_overlay(ovl, LDBnBSAYR(ovl->index), ovl->base_addr_y);
1410 lcdc_write_overlay(ovl, LDBnBSACR(ovl->index), ovl->base_addr_c);
1411
1412 lcdc_write(ovl->channel->lcdc, LDBCR,
1413 LDBCR_UPF(ovl->index) | LDBCR_UPD(ovl->index));
1414
1415 return 0;
1416 }
1417
1418 static int sh_mobile_lcdc_overlay_ioctl(struct fb_info *info, unsigned int cmd,
1419 unsigned long arg)
1420 {
1421 struct sh_mobile_lcdc_overlay *ovl = info->par;
1422
1423 switch (cmd) {
1424 case FBIO_WAITFORVSYNC:
1425 return sh_mobile_lcdc_wait_for_vsync(ovl->channel);
1426
1427 default:
1428 return -ENOIOCTLCMD;
1429 }
1430 }
1431
1432 static int sh_mobile_lcdc_overlay_check_var(struct fb_var_screeninfo *var,
1433 struct fb_info *info)
1434 {
1435 return __sh_mobile_lcdc_check_var(var, info);
1436 }
1437
1438 static int sh_mobile_lcdc_overlay_set_par(struct fb_info *info)
1439 {
1440 struct sh_mobile_lcdc_overlay *ovl = info->par;
1441
1442 ovl->format =
1443 sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1444
1445 ovl->xres = info->var.xres;
1446 ovl->xres_virtual = info->var.xres_virtual;
1447 ovl->yres = info->var.yres;
1448 ovl->yres_virtual = info->var.yres_virtual;
1449
1450 if (ovl->format->yuv)
1451 ovl->pitch = info->var.xres_virtual;
1452 else
1453 ovl->pitch = info->var.xres_virtual * ovl->format->bpp / 8;
1454
1455 sh_mobile_lcdc_overlay_setup(ovl);
1456
1457 info->fix.line_length = ovl->pitch;
1458
1459 if (sh_mobile_format_is_fourcc(&info->var)) {
1460 info->fix.type = FB_TYPE_FOURCC;
1461 info->fix.visual = FB_VISUAL_FOURCC;
1462 } else {
1463 info->fix.type = FB_TYPE_PACKED_PIXELS;
1464 info->fix.visual = FB_VISUAL_TRUECOLOR;
1465 }
1466
1467 return 0;
1468 }
1469
1470 /* Overlay blanking. Disable the overlay when blanked. */
1471 static int sh_mobile_lcdc_overlay_blank(int blank, struct fb_info *info)
1472 {
1473 struct sh_mobile_lcdc_overlay *ovl = info->par;
1474
1475 ovl->enabled = !blank;
1476 sh_mobile_lcdc_overlay_setup(ovl);
1477
1478 /* Prevent the backlight from receiving a blanking event by returning
1479 * a non-zero value.
1480 */
1481 return 1;
1482 }
1483
1484 static int
1485 sh_mobile_lcdc_overlay_mmap(struct fb_info *info, struct vm_area_struct *vma)
1486 {
1487 struct sh_mobile_lcdc_overlay *ovl = info->par;
1488
1489 return dma_mmap_coherent(ovl->channel->lcdc->dev, vma, ovl->fb_mem,
1490 ovl->dma_handle, ovl->fb_size);
1491 }
1492
1493 static const struct fb_ops sh_mobile_lcdc_overlay_ops = {
1494 .owner = THIS_MODULE,
1495 .fb_read = fb_sys_read,
1496 .fb_write = fb_sys_write,
1497 .fb_fillrect = sys_fillrect,
1498 .fb_copyarea = sys_copyarea,
1499 .fb_imageblit = sys_imageblit,
1500 .fb_blank = sh_mobile_lcdc_overlay_blank,
1501 .fb_pan_display = sh_mobile_lcdc_overlay_pan,
1502 .fb_ioctl = sh_mobile_lcdc_overlay_ioctl,
1503 .fb_check_var = sh_mobile_lcdc_overlay_check_var,
1504 .fb_set_par = sh_mobile_lcdc_overlay_set_par,
1505 .fb_mmap = sh_mobile_lcdc_overlay_mmap,
1506 };
1507
1508 static void
1509 sh_mobile_lcdc_overlay_fb_unregister(struct sh_mobile_lcdc_overlay *ovl)
1510 {
1511 struct fb_info *info = ovl->info;
1512
1513 if (info == NULL || info->dev == NULL)
1514 return;
1515
1516 unregister_framebuffer(ovl->info);
1517 }
1518
1519 static int
1520 sh_mobile_lcdc_overlay_fb_register(struct sh_mobile_lcdc_overlay *ovl)
1521 {
1522 struct sh_mobile_lcdc_priv *lcdc = ovl->channel->lcdc;
1523 struct fb_info *info = ovl->info;
1524 unsigned int i;
1525 int ret;
1526
1527 if (info == NULL)
1528 return 0;
1529
1530 ret = register_framebuffer(info);
1531 if (ret < 0)
1532 return ret;
1533
1534 dev_info(lcdc->dev, "registered %s/overlay %u as %dx%d %dbpp.\n",
1535 dev_name(lcdc->dev), ovl->index, info->var.xres,
1536 info->var.yres, info->var.bits_per_pixel);
1537
1538 for (i = 0; i < ARRAY_SIZE(overlay_sysfs_attrs); ++i) {
1539 ret = device_create_file(info->dev, &overlay_sysfs_attrs[i]);
1540 if (ret < 0)
1541 return ret;
1542 }
1543
1544 return 0;
1545 }
1546
1547 static void
1548 sh_mobile_lcdc_overlay_fb_cleanup(struct sh_mobile_lcdc_overlay *ovl)
1549 {
1550 struct fb_info *info = ovl->info;
1551
1552 if (info == NULL || info->device == NULL)
1553 return;
1554
1555 framebuffer_release(info);
1556 }
1557
1558 static int
1559 sh_mobile_lcdc_overlay_fb_init(struct sh_mobile_lcdc_overlay *ovl)
1560 {
1561 struct sh_mobile_lcdc_priv *priv = ovl->channel->lcdc;
1562 struct fb_var_screeninfo *var;
1563 struct fb_info *info;
1564
1565 /* Allocate and initialize the frame buffer device. */
1566 info = framebuffer_alloc(0, priv->dev);
1567 if (!info)
1568 return -ENOMEM;
1569
1570 ovl->info = info;
1571
1572 info->flags = FBINFO_FLAG_DEFAULT;
1573 info->fbops = &sh_mobile_lcdc_overlay_ops;
1574 info->device = priv->dev;
1575 info->screen_buffer = ovl->fb_mem;
1576 info->par = ovl;
1577
1578 /* Initialize fixed screen information. Restrict pan to 2 lines steps
1579 * for NV12 and NV21.
1580 */
1581 info->fix = sh_mobile_lcdc_overlay_fix;
1582 snprintf(info->fix.id, sizeof(info->fix.id),
1583 "SH Mobile LCDC Overlay %u", ovl->index);
1584 info->fix.smem_start = ovl->dma_handle;
1585 info->fix.smem_len = ovl->fb_size;
1586 info->fix.line_length = ovl->pitch;
1587
1588 if (ovl->format->yuv)
1589 info->fix.visual = FB_VISUAL_FOURCC;
1590 else
1591 info->fix.visual = FB_VISUAL_TRUECOLOR;
1592
1593 switch (ovl->format->fourcc) {
1594 case V4L2_PIX_FMT_NV12:
1595 case V4L2_PIX_FMT_NV21:
1596 info->fix.ypanstep = 2;
1597 /* Fall through */
1598 case V4L2_PIX_FMT_NV16:
1599 case V4L2_PIX_FMT_NV61:
1600 info->fix.xpanstep = 2;
1601 }
1602
1603 /* Initialize variable screen information. */
1604 var = &info->var;
1605 memset(var, 0, sizeof(*var));
1606 var->xres = ovl->xres;
1607 var->yres = ovl->yres;
1608 var->xres_virtual = ovl->xres_virtual;
1609 var->yres_virtual = ovl->yres_virtual;
1610 var->activate = FB_ACTIVATE_NOW;
1611
1612 /* Use the legacy API by default for RGB formats, and the FOURCC API
1613 * for YUV formats.
1614 */
1615 if (!ovl->format->yuv)
1616 var->bits_per_pixel = ovl->format->bpp;
1617 else
1618 var->grayscale = ovl->format->fourcc;
1619
1620 return sh_mobile_lcdc_overlay_check_var(var, info);
1621 }
1622
1623 /* -----------------------------------------------------------------------------
1624 * Frame buffer operations - main frame buffer
1625 */
1626
1627 static int sh_mobile_lcdc_setcolreg(u_int regno,
1628 u_int red, u_int green, u_int blue,
1629 u_int transp, struct fb_info *info)
1630 {
1631 u32 *palette = info->pseudo_palette;
1632
1633 if (regno >= PALETTE_NR)
1634 return -EINVAL;
1635
1636 /* only FB_VISUAL_TRUECOLOR supported */
1637
1638 red >>= 16 - info->var.red.length;
1639 green >>= 16 - info->var.green.length;
1640 blue >>= 16 - info->var.blue.length;
1641 transp >>= 16 - info->var.transp.length;
1642
1643 palette[regno] = (red << info->var.red.offset) |
1644 (green << info->var.green.offset) |
1645 (blue << info->var.blue.offset) |
1646 (transp << info->var.transp.offset);
1647
1648 return 0;
1649 }
1650
1651 static const struct fb_fix_screeninfo sh_mobile_lcdc_fix = {
1652 .id = "SH Mobile LCDC",
1653 .type = FB_TYPE_PACKED_PIXELS,
1654 .visual = FB_VISUAL_TRUECOLOR,
1655 .accel = FB_ACCEL_NONE,
1656 .xpanstep = 1,
1657 .ypanstep = 1,
1658 .ywrapstep = 0,
1659 .capabilities = FB_CAP_FOURCC,
1660 };
1661
1662 static void sh_mobile_lcdc_fillrect(struct fb_info *info,
1663 const struct fb_fillrect *rect)
1664 {
1665 sys_fillrect(info, rect);
1666 sh_mobile_lcdc_deferred_io_touch(info);
1667 }
1668
1669 static void sh_mobile_lcdc_copyarea(struct fb_info *info,
1670 const struct fb_copyarea *area)
1671 {
1672 sys_copyarea(info, area);
1673 sh_mobile_lcdc_deferred_io_touch(info);
1674 }
1675
1676 static void sh_mobile_lcdc_imageblit(struct fb_info *info,
1677 const struct fb_image *image)
1678 {
1679 sys_imageblit(info, image);
1680 sh_mobile_lcdc_deferred_io_touch(info);
1681 }
1682
1683 static int sh_mobile_lcdc_pan(struct fb_var_screeninfo *var,
1684 struct fb_info *info)
1685 {
1686 struct sh_mobile_lcdc_chan *ch = info->par;
1687 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
1688 unsigned long ldrcntr;
1689 unsigned long base_addr_y, base_addr_c;
1690 unsigned long y_offset;
1691 unsigned long c_offset;
1692
1693 if (!ch->format->yuv) {
1694 y_offset = (var->yoffset * ch->xres_virtual + var->xoffset)
1695 * ch->format->bpp / 8;
1696 c_offset = 0;
1697 } else {
1698 unsigned int xsub = ch->format->bpp < 24 ? 2 : 1;
1699 unsigned int ysub = ch->format->bpp < 16 ? 2 : 1;
1700
1701 y_offset = var->yoffset * ch->xres_virtual + var->xoffset;
1702 c_offset = var->yoffset / ysub * ch->xres_virtual * 2 / xsub
1703 + var->xoffset * 2 / xsub;
1704 }
1705
1706 /* If the Y offset hasn't changed, the C offset hasn't either. There's
1707 * nothing to do in that case.
1708 */
1709 if (y_offset == ch->pan_y_offset)
1710 return 0;
1711
1712 /* Set the source address for the next refresh */
1713 base_addr_y = ch->dma_handle + y_offset;
1714 base_addr_c = ch->dma_handle + ch->xres_virtual * ch->yres_virtual
1715 + c_offset;
1716
1717 ch->base_addr_y = base_addr_y;
1718 ch->base_addr_c = base_addr_c;
1719 ch->pan_y_offset = y_offset;
1720
1721 lcdc_write_chan_mirror(ch, LDSA1R, base_addr_y);
1722 if (ch->format->yuv)
1723 lcdc_write_chan_mirror(ch, LDSA2R, base_addr_c);
1724
1725 ldrcntr = lcdc_read(priv, _LDRCNTR);
1726 if (lcdc_chan_is_sublcd(ch))
1727 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_SRS);
1728 else
1729 lcdc_write(ch->lcdc, _LDRCNTR, ldrcntr ^ LDRCNTR_MRS);
1730
1731
1732 sh_mobile_lcdc_deferred_io_touch(info);
1733
1734 return 0;
1735 }
1736
1737 static int sh_mobile_lcdc_ioctl(struct fb_info *info, unsigned int cmd,
1738 unsigned long arg)
1739 {
1740 struct sh_mobile_lcdc_chan *ch = info->par;
1741 int retval;
1742
1743 switch (cmd) {
1744 case FBIO_WAITFORVSYNC:
1745 retval = sh_mobile_lcdc_wait_for_vsync(ch);
1746 break;
1747
1748 default:
1749 retval = -ENOIOCTLCMD;
1750 break;
1751 }
1752 return retval;
1753 }
1754
1755 static void sh_mobile_fb_reconfig(struct fb_info *info)
1756 {
1757 struct sh_mobile_lcdc_chan *ch = info->par;
1758 struct fb_var_screeninfo var;
1759 struct fb_videomode mode;
1760
1761 if (ch->use_count > 1 || (ch->use_count == 1 && !info->fbcon_par))
1762 /* More framebuffer users are active */
1763 return;
1764
1765 fb_var_to_videomode(&mode, &info->var);
1766
1767 if (fb_mode_is_equal(&ch->display.mode, &mode))
1768 return;
1769
1770 /* Display has been re-plugged, framebuffer is free now, reconfigure */
1771 var = info->var;
1772 fb_videomode_to_var(&var, &ch->display.mode);
1773 var.width = ch->display.width;
1774 var.height = ch->display.height;
1775 var.activate = FB_ACTIVATE_NOW;
1776
1777 if (fb_set_var(info, &var) < 0)
1778 /* Couldn't reconfigure, hopefully, can continue as before */
1779 return;
1780
1781 fbcon_update_vcs(info, true);
1782 }
1783
1784 /*
1785 * Locking: both .fb_release() and .fb_open() are called with info->lock held if
1786 * user == 1, or with console sem held, if user == 0.
1787 */
1788 static int sh_mobile_lcdc_release(struct fb_info *info, int user)
1789 {
1790 struct sh_mobile_lcdc_chan *ch = info->par;
1791
1792 mutex_lock(&ch->open_lock);
1793 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1794
1795 ch->use_count--;
1796
1797 /* Nothing to reconfigure, when called from fbcon */
1798 if (user) {
1799 console_lock();
1800 sh_mobile_fb_reconfig(info);
1801 console_unlock();
1802 }
1803
1804 mutex_unlock(&ch->open_lock);
1805
1806 return 0;
1807 }
1808
1809 static int sh_mobile_lcdc_open(struct fb_info *info, int user)
1810 {
1811 struct sh_mobile_lcdc_chan *ch = info->par;
1812
1813 mutex_lock(&ch->open_lock);
1814 ch->use_count++;
1815
1816 dev_dbg(info->dev, "%s(): %d users\n", __func__, ch->use_count);
1817 mutex_unlock(&ch->open_lock);
1818
1819 return 0;
1820 }
1821
1822 static int sh_mobile_lcdc_check_var(struct fb_var_screeninfo *var,
1823 struct fb_info *info)
1824 {
1825 struct sh_mobile_lcdc_chan *ch = info->par;
1826 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1827 unsigned int best_dist = (unsigned int)-1;
1828 unsigned int best_xres = 0;
1829 unsigned int best_yres = 0;
1830 unsigned int i;
1831 int ret;
1832
1833 /* If board code provides us with a list of available modes, make sure
1834 * we use one of them. Find the mode closest to the requested one. The
1835 * distance between two modes is defined as the size of the
1836 * non-overlapping parts of the two rectangles.
1837 */
1838 for (i = 0; i < ch->cfg->num_modes; ++i) {
1839 const struct fb_videomode *mode = &ch->cfg->lcd_modes[i];
1840 unsigned int dist;
1841
1842 /* We can only round up. */
1843 if (var->xres > mode->xres || var->yres > mode->yres)
1844 continue;
1845
1846 dist = var->xres * var->yres + mode->xres * mode->yres
1847 - 2 * min(var->xres, mode->xres)
1848 * min(var->yres, mode->yres);
1849
1850 if (dist < best_dist) {
1851 best_xres = mode->xres;
1852 best_yres = mode->yres;
1853 best_dist = dist;
1854 }
1855 }
1856
1857 /* If no available mode can be used, return an error. */
1858 if (ch->cfg->num_modes != 0) {
1859 if (best_dist == (unsigned int)-1)
1860 return -EINVAL;
1861
1862 var->xres = best_xres;
1863 var->yres = best_yres;
1864 }
1865
1866 ret = __sh_mobile_lcdc_check_var(var, info);
1867 if (ret < 0)
1868 return ret;
1869
1870 /* only accept the forced_fourcc for dual channel configurations */
1871 if (p->forced_fourcc &&
1872 p->forced_fourcc != sh_mobile_format_fourcc(var))
1873 return -EINVAL;
1874
1875 return 0;
1876 }
1877
1878 static int sh_mobile_lcdc_set_par(struct fb_info *info)
1879 {
1880 struct sh_mobile_lcdc_chan *ch = info->par;
1881 int ret;
1882
1883 sh_mobile_lcdc_stop(ch->lcdc);
1884
1885 ch->format = sh_mobile_format_info(sh_mobile_format_fourcc(&info->var));
1886 ch->colorspace = info->var.colorspace;
1887
1888 ch->xres = info->var.xres;
1889 ch->xres_virtual = info->var.xres_virtual;
1890 ch->yres = info->var.yres;
1891 ch->yres_virtual = info->var.yres_virtual;
1892
1893 if (ch->format->yuv)
1894 ch->pitch = info->var.xres_virtual;
1895 else
1896 ch->pitch = info->var.xres_virtual * ch->format->bpp / 8;
1897
1898 ret = sh_mobile_lcdc_start(ch->lcdc);
1899 if (ret < 0)
1900 dev_err(info->dev, "%s: unable to restart LCDC\n", __func__);
1901
1902 info->fix.line_length = ch->pitch;
1903
1904 if (sh_mobile_format_is_fourcc(&info->var)) {
1905 info->fix.type = FB_TYPE_FOURCC;
1906 info->fix.visual = FB_VISUAL_FOURCC;
1907 } else {
1908 info->fix.type = FB_TYPE_PACKED_PIXELS;
1909 info->fix.visual = FB_VISUAL_TRUECOLOR;
1910 }
1911
1912 return ret;
1913 }
1914
1915 /*
1916 * Screen blanking. Behavior is as follows:
1917 * FB_BLANK_UNBLANK: screen unblanked, clocks enabled
1918 * FB_BLANK_NORMAL: screen blanked, clocks enabled
1919 * FB_BLANK_VSYNC,
1920 * FB_BLANK_HSYNC,
1921 * FB_BLANK_POWEROFF: screen blanked, clocks disabled
1922 */
1923 static int sh_mobile_lcdc_blank(int blank, struct fb_info *info)
1924 {
1925 struct sh_mobile_lcdc_chan *ch = info->par;
1926 struct sh_mobile_lcdc_priv *p = ch->lcdc;
1927
1928 /* blank the screen? */
1929 if (blank > FB_BLANK_UNBLANK && ch->blank_status == FB_BLANK_UNBLANK) {
1930 struct fb_fillrect rect = {
1931 .width = ch->xres,
1932 .height = ch->yres,
1933 };
1934 sh_mobile_lcdc_fillrect(info, &rect);
1935 }
1936 /* turn clocks on? */
1937 if (blank <= FB_BLANK_NORMAL && ch->blank_status > FB_BLANK_NORMAL) {
1938 sh_mobile_lcdc_clk_on(p);
1939 }
1940 /* turn clocks off? */
1941 if (blank > FB_BLANK_NORMAL && ch->blank_status <= FB_BLANK_NORMAL) {
1942 /* make sure the screen is updated with the black fill before
1943 * switching the clocks off. one vsync is not enough since
1944 * blanking may occur in the middle of a refresh. deferred io
1945 * mode will reenable the clocks and update the screen in time,
1946 * so it does not need this. */
1947 if (!info->fbdefio) {
1948 sh_mobile_lcdc_wait_for_vsync(ch);
1949 sh_mobile_lcdc_wait_for_vsync(ch);
1950 }
1951 sh_mobile_lcdc_clk_off(p);
1952 }
1953
1954 ch->blank_status = blank;
1955 return 0;
1956 }
1957
1958 static int
1959 sh_mobile_lcdc_mmap(struct fb_info *info, struct vm_area_struct *vma)
1960 {
1961 struct sh_mobile_lcdc_chan *ch = info->par;
1962
1963 return dma_mmap_coherent(ch->lcdc->dev, vma, ch->fb_mem,
1964 ch->dma_handle, ch->fb_size);
1965 }
1966
1967 static const struct fb_ops sh_mobile_lcdc_ops = {
1968 .owner = THIS_MODULE,
1969 .fb_setcolreg = sh_mobile_lcdc_setcolreg,
1970 .fb_read = fb_sys_read,
1971 .fb_write = fb_sys_write,
1972 .fb_fillrect = sh_mobile_lcdc_fillrect,
1973 .fb_copyarea = sh_mobile_lcdc_copyarea,
1974 .fb_imageblit = sh_mobile_lcdc_imageblit,
1975 .fb_blank = sh_mobile_lcdc_blank,
1976 .fb_pan_display = sh_mobile_lcdc_pan,
1977 .fb_ioctl = sh_mobile_lcdc_ioctl,
1978 .fb_open = sh_mobile_lcdc_open,
1979 .fb_release = sh_mobile_lcdc_release,
1980 .fb_check_var = sh_mobile_lcdc_check_var,
1981 .fb_set_par = sh_mobile_lcdc_set_par,
1982 .fb_mmap = sh_mobile_lcdc_mmap,
1983 };
1984
1985 static void
1986 sh_mobile_lcdc_channel_fb_unregister(struct sh_mobile_lcdc_chan *ch)
1987 {
1988 if (ch->info && ch->info->dev)
1989 unregister_framebuffer(ch->info);
1990 }
1991
1992 static int
1993 sh_mobile_lcdc_channel_fb_register(struct sh_mobile_lcdc_chan *ch)
1994 {
1995 struct fb_info *info = ch->info;
1996 int ret;
1997
1998 if (info->fbdefio) {
1999 ch->sglist = vmalloc(sizeof(struct scatterlist) *
2000 ch->fb_size >> PAGE_SHIFT);
2001 if (!ch->sglist)
2002 return -ENOMEM;
2003 }
2004
2005 info->bl_dev = ch->bl;
2006
2007 ret = register_framebuffer(info);
2008 if (ret < 0)
2009 return ret;
2010
2011 dev_info(ch->lcdc->dev, "registered %s/%s as %dx%d %dbpp.\n",
2012 dev_name(ch->lcdc->dev), (ch->cfg->chan == LCDC_CHAN_MAINLCD) ?
2013 "mainlcd" : "sublcd", info->var.xres, info->var.yres,
2014 info->var.bits_per_pixel);
2015
2016 /* deferred io mode: disable clock to save power */
2017 if (info->fbdefio || info->state == FBINFO_STATE_SUSPENDED)
2018 sh_mobile_lcdc_clk_off(ch->lcdc);
2019
2020 return ret;
2021 }
2022
2023 static void
2024 sh_mobile_lcdc_channel_fb_cleanup(struct sh_mobile_lcdc_chan *ch)
2025 {
2026 struct fb_info *info = ch->info;
2027
2028 if (!info || !info->device)
2029 return;
2030
2031 vfree(ch->sglist);
2032
2033 fb_dealloc_cmap(&info->cmap);
2034 framebuffer_release(info);
2035 }
2036
2037 static int
2038 sh_mobile_lcdc_channel_fb_init(struct sh_mobile_lcdc_chan *ch,
2039 const struct fb_videomode *modes,
2040 unsigned int num_modes)
2041 {
2042 struct sh_mobile_lcdc_priv *priv = ch->lcdc;
2043 struct fb_var_screeninfo *var;
2044 struct fb_info *info;
2045 int ret;
2046
2047 /* Allocate and initialize the frame buffer device. Create the modes
2048 * list and allocate the color map.
2049 */
2050 info = framebuffer_alloc(0, priv->dev);
2051 if (!info)
2052 return -ENOMEM;
2053
2054 ch->info = info;
2055
2056 info->flags = FBINFO_FLAG_DEFAULT;
2057 info->fbops = &sh_mobile_lcdc_ops;
2058 info->device = priv->dev;
2059 info->screen_buffer = ch->fb_mem;
2060 info->pseudo_palette = &ch->pseudo_palette;
2061 info->par = ch;
2062
2063 fb_videomode_to_modelist(modes, num_modes, &info->modelist);
2064
2065 ret = fb_alloc_cmap(&info->cmap, PALETTE_NR, 0);
2066 if (ret < 0) {
2067 dev_err(priv->dev, "unable to allocate cmap\n");
2068 return ret;
2069 }
2070
2071 /* Initialize fixed screen information. Restrict pan to 2 lines steps
2072 * for NV12 and NV21.
2073 */
2074 info->fix = sh_mobile_lcdc_fix;
2075 info->fix.smem_start = ch->dma_handle;
2076 info->fix.smem_len = ch->fb_size;
2077 info->fix.line_length = ch->pitch;
2078
2079 if (ch->format->yuv)
2080 info->fix.visual = FB_VISUAL_FOURCC;
2081 else
2082 info->fix.visual = FB_VISUAL_TRUECOLOR;
2083
2084 switch (ch->format->fourcc) {
2085 case V4L2_PIX_FMT_NV12:
2086 case V4L2_PIX_FMT_NV21:
2087 info->fix.ypanstep = 2;
2088 /* Fall through */
2089 case V4L2_PIX_FMT_NV16:
2090 case V4L2_PIX_FMT_NV61:
2091 info->fix.xpanstep = 2;
2092 }
2093
2094 /* Initialize variable screen information using the first mode as
2095 * default.
2096 */
2097 var = &info->var;
2098 fb_videomode_to_var(var, modes);
2099 var->width = ch->display.width;
2100 var->height = ch->display.height;
2101 var->xres_virtual = ch->xres_virtual;
2102 var->yres_virtual = ch->yres_virtual;
2103 var->activate = FB_ACTIVATE_NOW;
2104
2105 /* Use the legacy API by default for RGB formats, and the FOURCC API
2106 * for YUV formats.
2107 */
2108 if (!ch->format->yuv)
2109 var->bits_per_pixel = ch->format->bpp;
2110 else
2111 var->grayscale = ch->format->fourcc;
2112
2113 ret = sh_mobile_lcdc_check_var(var, info);
2114 if (ret)
2115 return ret;
2116
2117 return 0;
2118 }
2119
2120 /* -----------------------------------------------------------------------------
2121 * Backlight
2122 */
2123
2124 static int sh_mobile_lcdc_update_bl(struct backlight_device *bdev)
2125 {
2126 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2127 int brightness = bdev->props.brightness;
2128
2129 if (bdev->props.power != FB_BLANK_UNBLANK ||
2130 bdev->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
2131 brightness = 0;
2132
2133 ch->bl_brightness = brightness;
2134 return ch->cfg->bl_info.set_brightness(brightness);
2135 }
2136
2137 static int sh_mobile_lcdc_get_brightness(struct backlight_device *bdev)
2138 {
2139 struct sh_mobile_lcdc_chan *ch = bl_get_data(bdev);
2140
2141 return ch->bl_brightness;
2142 }
2143
2144 static int sh_mobile_lcdc_check_fb(struct backlight_device *bdev,
2145 struct fb_info *info)
2146 {
2147 return (info->bl_dev == bdev);
2148 }
2149
2150 static const struct backlight_ops sh_mobile_lcdc_bl_ops = {
2151 .options = BL_CORE_SUSPENDRESUME,
2152 .update_status = sh_mobile_lcdc_update_bl,
2153 .get_brightness = sh_mobile_lcdc_get_brightness,
2154 .check_fb = sh_mobile_lcdc_check_fb,
2155 };
2156
2157 static struct backlight_device *sh_mobile_lcdc_bl_probe(struct device *parent,
2158 struct sh_mobile_lcdc_chan *ch)
2159 {
2160 struct backlight_device *bl;
2161
2162 bl = backlight_device_register(ch->cfg->bl_info.name, parent, ch,
2163 &sh_mobile_lcdc_bl_ops, NULL);
2164 if (IS_ERR(bl)) {
2165 dev_err(parent, "unable to register backlight device: %ld\n",
2166 PTR_ERR(bl));
2167 return NULL;
2168 }
2169
2170 bl->props.max_brightness = ch->cfg->bl_info.max_brightness;
2171 bl->props.brightness = bl->props.max_brightness;
2172 backlight_update_status(bl);
2173
2174 return bl;
2175 }
2176
2177 static void sh_mobile_lcdc_bl_remove(struct backlight_device *bdev)
2178 {
2179 backlight_device_unregister(bdev);
2180 }
2181
2182 /* -----------------------------------------------------------------------------
2183 * Power management
2184 */
2185
2186 static int sh_mobile_lcdc_suspend(struct device *dev)
2187 {
2188 struct platform_device *pdev = to_platform_device(dev);
2189
2190 sh_mobile_lcdc_stop(platform_get_drvdata(pdev));
2191 return 0;
2192 }
2193
2194 static int sh_mobile_lcdc_resume(struct device *dev)
2195 {
2196 struct platform_device *pdev = to_platform_device(dev);
2197
2198 return sh_mobile_lcdc_start(platform_get_drvdata(pdev));
2199 }
2200
2201 static int sh_mobile_lcdc_runtime_suspend(struct device *dev)
2202 {
2203 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2204
2205 /* turn off LCDC hardware */
2206 lcdc_write(priv, _LDCNT1R, 0);
2207
2208 return 0;
2209 }
2210
2211 static int sh_mobile_lcdc_runtime_resume(struct device *dev)
2212 {
2213 struct sh_mobile_lcdc_priv *priv = dev_get_drvdata(dev);
2214
2215 __sh_mobile_lcdc_start(priv);
2216
2217 return 0;
2218 }
2219
2220 static const struct dev_pm_ops sh_mobile_lcdc_dev_pm_ops = {
2221 .suspend = sh_mobile_lcdc_suspend,
2222 .resume = sh_mobile_lcdc_resume,
2223 .runtime_suspend = sh_mobile_lcdc_runtime_suspend,
2224 .runtime_resume = sh_mobile_lcdc_runtime_resume,
2225 };
2226
2227 /* -----------------------------------------------------------------------------
2228 * Framebuffer notifier
2229 */
2230
2231 /* -----------------------------------------------------------------------------
2232 * Probe/remove and driver init/exit
2233 */
2234
2235 static const struct fb_videomode default_720p = {
2236 .name = "HDMI 720p",
2237 .xres = 1280,
2238 .yres = 720,
2239
2240 .left_margin = 220,
2241 .right_margin = 110,
2242 .hsync_len = 40,
2243
2244 .upper_margin = 20,
2245 .lower_margin = 5,
2246 .vsync_len = 5,
2247
2248 .pixclock = 13468,
2249 .refresh = 60,
2250 .sync = FB_SYNC_VERT_HIGH_ACT | FB_SYNC_HOR_HIGH_ACT,
2251 };
2252
2253 static int sh_mobile_lcdc_remove(struct platform_device *pdev)
2254 {
2255 struct sh_mobile_lcdc_priv *priv = platform_get_drvdata(pdev);
2256 unsigned int i;
2257
2258 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++)
2259 sh_mobile_lcdc_overlay_fb_unregister(&priv->overlays[i]);
2260 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2261 sh_mobile_lcdc_channel_fb_unregister(&priv->ch[i]);
2262
2263 sh_mobile_lcdc_stop(priv);
2264
2265 for (i = 0; i < ARRAY_SIZE(priv->overlays); i++) {
2266 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2267
2268 sh_mobile_lcdc_overlay_fb_cleanup(ovl);
2269
2270 if (ovl->fb_mem)
2271 dma_free_coherent(&pdev->dev, ovl->fb_size,
2272 ovl->fb_mem, ovl->dma_handle);
2273 }
2274
2275 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2276 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2277
2278 if (ch->tx_dev) {
2279 ch->tx_dev->lcdc = NULL;
2280 module_put(ch->cfg->tx_dev->dev.driver->owner);
2281 }
2282
2283 sh_mobile_lcdc_channel_fb_cleanup(ch);
2284
2285 if (ch->fb_mem)
2286 dma_free_coherent(&pdev->dev, ch->fb_size,
2287 ch->fb_mem, ch->dma_handle);
2288 }
2289
2290 for (i = 0; i < ARRAY_SIZE(priv->ch); i++) {
2291 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2292
2293 if (ch->bl)
2294 sh_mobile_lcdc_bl_remove(ch->bl);
2295 mutex_destroy(&ch->open_lock);
2296 }
2297
2298 if (priv->dot_clk) {
2299 pm_runtime_disable(&pdev->dev);
2300 clk_put(priv->dot_clk);
2301 }
2302
2303 if (priv->base)
2304 iounmap(priv->base);
2305
2306 if (priv->irq)
2307 free_irq(priv->irq, priv);
2308 kfree(priv);
2309 return 0;
2310 }
2311
2312 static int sh_mobile_lcdc_check_interface(struct sh_mobile_lcdc_chan *ch)
2313 {
2314 int interface_type = ch->cfg->interface_type;
2315
2316 switch (interface_type) {
2317 case RGB8:
2318 case RGB9:
2319 case RGB12A:
2320 case RGB12B:
2321 case RGB16:
2322 case RGB18:
2323 case RGB24:
2324 case SYS8A:
2325 case SYS8B:
2326 case SYS8C:
2327 case SYS8D:
2328 case SYS9:
2329 case SYS12:
2330 case SYS16A:
2331 case SYS16B:
2332 case SYS16C:
2333 case SYS18:
2334 case SYS24:
2335 break;
2336 default:
2337 return -EINVAL;
2338 }
2339
2340 /* SUBLCD only supports SYS interface */
2341 if (lcdc_chan_is_sublcd(ch)) {
2342 if (!(interface_type & LDMT1R_IFM))
2343 return -EINVAL;
2344
2345 interface_type &= ~LDMT1R_IFM;
2346 }
2347
2348 ch->ldmt1r_value = interface_type;
2349 return 0;
2350 }
2351
2352 static int
2353 sh_mobile_lcdc_overlay_init(struct sh_mobile_lcdc_overlay *ovl)
2354 {
2355 const struct sh_mobile_lcdc_format_info *format;
2356 struct device *dev = ovl->channel->lcdc->dev;
2357 int ret;
2358
2359 if (ovl->cfg->fourcc == 0)
2360 return 0;
2361
2362 /* Validate the format. */
2363 format = sh_mobile_format_info(ovl->cfg->fourcc);
2364 if (format == NULL) {
2365 dev_err(dev, "Invalid FOURCC %08x\n", ovl->cfg->fourcc);
2366 return -EINVAL;
2367 }
2368
2369 ovl->enabled = false;
2370 ovl->mode = LCDC_OVERLAY_BLEND;
2371 ovl->alpha = 255;
2372 ovl->rop3 = 0;
2373 ovl->pos_x = 0;
2374 ovl->pos_y = 0;
2375
2376 /* The default Y virtual resolution is twice the panel size to allow for
2377 * double-buffering.
2378 */
2379 ovl->format = format;
2380 ovl->xres = ovl->cfg->max_xres;
2381 ovl->xres_virtual = ovl->xres;
2382 ovl->yres = ovl->cfg->max_yres;
2383 ovl->yres_virtual = ovl->yres * 2;
2384
2385 if (!format->yuv)
2386 ovl->pitch = ovl->xres_virtual * format->bpp / 8;
2387 else
2388 ovl->pitch = ovl->xres_virtual;
2389
2390 /* Allocate frame buffer memory. */
2391 ovl->fb_size = ovl->cfg->max_xres * ovl->cfg->max_yres
2392 * format->bpp / 8 * 2;
2393 ovl->fb_mem = dma_alloc_coherent(dev, ovl->fb_size, &ovl->dma_handle,
2394 GFP_KERNEL);
2395 if (!ovl->fb_mem) {
2396 dev_err(dev, "unable to allocate buffer\n");
2397 return -ENOMEM;
2398 }
2399
2400 ret = sh_mobile_lcdc_overlay_fb_init(ovl);
2401 if (ret < 0)
2402 return ret;
2403
2404 return 0;
2405 }
2406
2407 static int
2408 sh_mobile_lcdc_channel_init(struct sh_mobile_lcdc_chan *ch)
2409 {
2410 const struct sh_mobile_lcdc_format_info *format;
2411 const struct sh_mobile_lcdc_chan_cfg *cfg = ch->cfg;
2412 struct device *dev = ch->lcdc->dev;
2413 const struct fb_videomode *max_mode;
2414 const struct fb_videomode *mode;
2415 unsigned int num_modes;
2416 unsigned int max_size;
2417 unsigned int i;
2418
2419 /* Validate the format. */
2420 format = sh_mobile_format_info(cfg->fourcc);
2421 if (format == NULL) {
2422 dev_err(dev, "Invalid FOURCC %08x.\n", cfg->fourcc);
2423 return -EINVAL;
2424 }
2425
2426 /* Iterate through the modes to validate them and find the highest
2427 * resolution.
2428 */
2429 max_mode = NULL;
2430 max_size = 0;
2431
2432 for (i = 0, mode = cfg->lcd_modes; i < cfg->num_modes; i++, mode++) {
2433 unsigned int size = mode->yres * mode->xres;
2434
2435 /* NV12/NV21 buffers must have even number of lines */
2436 if ((cfg->fourcc == V4L2_PIX_FMT_NV12 ||
2437 cfg->fourcc == V4L2_PIX_FMT_NV21) && (mode->yres & 0x1)) {
2438 dev_err(dev, "yres must be multiple of 2 for "
2439 "YCbCr420 mode.\n");
2440 return -EINVAL;
2441 }
2442
2443 if (size > max_size) {
2444 max_mode = mode;
2445 max_size = size;
2446 }
2447 }
2448
2449 if (!max_size)
2450 max_size = MAX_XRES * MAX_YRES;
2451 else
2452 dev_dbg(dev, "Found largest videomode %ux%u\n",
2453 max_mode->xres, max_mode->yres);
2454
2455 if (cfg->lcd_modes == NULL) {
2456 mode = &default_720p;
2457 num_modes = 1;
2458 } else {
2459 mode = cfg->lcd_modes;
2460 num_modes = cfg->num_modes;
2461 }
2462
2463 /* Use the first mode as default. The default Y virtual resolution is
2464 * twice the panel size to allow for double-buffering.
2465 */
2466 ch->format = format;
2467 ch->xres = mode->xres;
2468 ch->xres_virtual = mode->xres;
2469 ch->yres = mode->yres;
2470 ch->yres_virtual = mode->yres * 2;
2471
2472 if (!format->yuv) {
2473 ch->colorspace = V4L2_COLORSPACE_SRGB;
2474 ch->pitch = ch->xres_virtual * format->bpp / 8;
2475 } else {
2476 ch->colorspace = V4L2_COLORSPACE_REC709;
2477 ch->pitch = ch->xres_virtual;
2478 }
2479
2480 ch->display.width = cfg->panel_cfg.width;
2481 ch->display.height = cfg->panel_cfg.height;
2482 ch->display.mode = *mode;
2483
2484 /* Allocate frame buffer memory. */
2485 ch->fb_size = max_size * format->bpp / 8 * 2;
2486 ch->fb_mem = dma_alloc_coherent(dev, ch->fb_size, &ch->dma_handle,
2487 GFP_KERNEL);
2488 if (ch->fb_mem == NULL) {
2489 dev_err(dev, "unable to allocate buffer\n");
2490 return -ENOMEM;
2491 }
2492
2493 /* Initialize the transmitter device if present. */
2494 if (cfg->tx_dev) {
2495 if (!cfg->tx_dev->dev.driver ||
2496 !try_module_get(cfg->tx_dev->dev.driver->owner)) {
2497 dev_warn(dev, "unable to get transmitter device\n");
2498 return -EINVAL;
2499 }
2500 ch->tx_dev = platform_get_drvdata(cfg->tx_dev);
2501 ch->tx_dev->lcdc = ch;
2502 ch->tx_dev->def_mode = *mode;
2503 }
2504
2505 return sh_mobile_lcdc_channel_fb_init(ch, mode, num_modes);
2506 }
2507
2508 static int sh_mobile_lcdc_probe(struct platform_device *pdev)
2509 {
2510 struct sh_mobile_lcdc_info *pdata = pdev->dev.platform_data;
2511 struct sh_mobile_lcdc_priv *priv;
2512 struct resource *res;
2513 int num_channels;
2514 int error;
2515 int irq, i;
2516
2517 if (!pdata) {
2518 dev_err(&pdev->dev, "no platform data defined\n");
2519 return -EINVAL;
2520 }
2521
2522 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
2523 irq = platform_get_irq(pdev, 0);
2524 if (!res || irq < 0) {
2525 dev_err(&pdev->dev, "cannot get platform resources\n");
2526 return -ENOENT;
2527 }
2528
2529 priv = kzalloc(sizeof(*priv), GFP_KERNEL);
2530 if (!priv)
2531 return -ENOMEM;
2532
2533 priv->dev = &pdev->dev;
2534
2535 for (i = 0; i < ARRAY_SIZE(priv->ch); i++)
2536 mutex_init(&priv->ch[i].open_lock);
2537 platform_set_drvdata(pdev, priv);
2538
2539 error = request_irq(irq, sh_mobile_lcdc_irq, 0,
2540 dev_name(&pdev->dev), priv);
2541 if (error) {
2542 dev_err(&pdev->dev, "unable to request irq\n");
2543 goto err1;
2544 }
2545
2546 priv->irq = irq;
2547 atomic_set(&priv->hw_usecnt, -1);
2548
2549 for (i = 0, num_channels = 0; i < ARRAY_SIZE(pdata->ch); i++) {
2550 struct sh_mobile_lcdc_chan *ch = priv->ch + num_channels;
2551
2552 ch->lcdc = priv;
2553 ch->cfg = &pdata->ch[i];
2554
2555 error = sh_mobile_lcdc_check_interface(ch);
2556 if (error) {
2557 dev_err(&pdev->dev, "unsupported interface type\n");
2558 goto err1;
2559 }
2560 init_waitqueue_head(&ch->frame_end_wait);
2561 init_completion(&ch->vsync_completion);
2562
2563 /* probe the backlight is there is one defined */
2564 if (ch->cfg->bl_info.max_brightness)
2565 ch->bl = sh_mobile_lcdc_bl_probe(&pdev->dev, ch);
2566
2567 switch (pdata->ch[i].chan) {
2568 case LCDC_CHAN_MAINLCD:
2569 ch->enabled = LDCNT2R_ME;
2570 ch->reg_offs = lcdc_offs_mainlcd;
2571 num_channels++;
2572 break;
2573 case LCDC_CHAN_SUBLCD:
2574 ch->enabled = LDCNT2R_SE;
2575 ch->reg_offs = lcdc_offs_sublcd;
2576 num_channels++;
2577 break;
2578 }
2579 }
2580
2581 if (!num_channels) {
2582 dev_err(&pdev->dev, "no channels defined\n");
2583 error = -EINVAL;
2584 goto err1;
2585 }
2586
2587 /* for dual channel LCDC (MAIN + SUB) force shared format setting */
2588 if (num_channels == 2)
2589 priv->forced_fourcc = pdata->ch[0].fourcc;
2590
2591 priv->base = ioremap(res->start, resource_size(res));
2592 if (!priv->base) {
2593 error = -ENOMEM;
2594 goto err1;
2595 }
2596
2597 error = sh_mobile_lcdc_setup_clocks(priv, pdata->clock_source);
2598 if (error) {
2599 dev_err(&pdev->dev, "unable to setup clocks\n");
2600 goto err1;
2601 }
2602
2603 /* Enable runtime PM. */
2604 pm_runtime_enable(&pdev->dev);
2605
2606 for (i = 0; i < num_channels; i++) {
2607 struct sh_mobile_lcdc_chan *ch = &priv->ch[i];
2608
2609 error = sh_mobile_lcdc_channel_init(ch);
2610 if (error)
2611 goto err1;
2612 }
2613
2614 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2615 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2616
2617 ovl->cfg = &pdata->overlays[i];
2618 ovl->channel = &priv->ch[0];
2619
2620 error = sh_mobile_lcdc_overlay_init(ovl);
2621 if (error)
2622 goto err1;
2623 }
2624
2625 error = sh_mobile_lcdc_start(priv);
2626 if (error) {
2627 dev_err(&pdev->dev, "unable to start hardware\n");
2628 goto err1;
2629 }
2630
2631 for (i = 0; i < num_channels; i++) {
2632 struct sh_mobile_lcdc_chan *ch = priv->ch + i;
2633
2634 error = sh_mobile_lcdc_channel_fb_register(ch);
2635 if (error)
2636 goto err1;
2637 }
2638
2639 for (i = 0; i < ARRAY_SIZE(pdata->overlays); i++) {
2640 struct sh_mobile_lcdc_overlay *ovl = &priv->overlays[i];
2641
2642 error = sh_mobile_lcdc_overlay_fb_register(ovl);
2643 if (error)
2644 goto err1;
2645 }
2646
2647 return 0;
2648 err1:
2649 sh_mobile_lcdc_remove(pdev);
2650
2651 return error;
2652 }
2653
2654 static struct platform_driver sh_mobile_lcdc_driver = {
2655 .driver = {
2656 .name = "sh_mobile_lcdc_fb",
2657 .pm = &sh_mobile_lcdc_dev_pm_ops,
2658 },
2659 .probe = sh_mobile_lcdc_probe,
2660 .remove = sh_mobile_lcdc_remove,
2661 };
2662
2663 module_platform_driver(sh_mobile_lcdc_driver);
2664
2665 MODULE_DESCRIPTION("SuperH Mobile LCDC Framebuffer driver");
2666 MODULE_AUTHOR("Magnus Damm <damm@opensource.se>");
2667 MODULE_LICENSE("GPL v2");
Linux with added FPC-III support