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