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