1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SuperH Video Output Unit (VOU) driver
4 *
5 * Copyright (C) 2010, Guennadi Liakhovetski <[email protected]>
6 */
7
8 #include <linux/dma-mapping.h>
9 #include <linux/delay.h>
10 #include <linux/errno.h>
11 #include <linux/fs.h>
12 #include <linux/i2c.h>
13 #include <linux/init.h>
14 #include <linux/interrupt.h>
15 #include <linux/kernel.h>
16 #include <linux/platform_device.h>
17 #include <linux/pm_runtime.h>
18 #include <linux/slab.h>
19 #include <linux/videodev2.h>
20 #include <linux/module.h>
21
22 #include <media/drv-intf/sh_vou.h>
23 #include <media/v4l2-common.h>
24 #include <media/v4l2-device.h>
25 #include <media/v4l2-ioctl.h>
26 #include <media/v4l2-mediabus.h>
27 #include <media/videobuf2-v4l2.h>
28 #include <media/videobuf2-dma-contig.h>
29
30 /* Mirror addresses are not available for all registers */
31 #define VOUER 0
32 #define VOUCR 4
33 #define VOUSTR 8
34 #define VOUVCR 0xc
35 #define VOUISR 0x10
36 #define VOUBCR 0x14
37 #define VOUDPR 0x18
38 #define VOUDSR 0x1c
39 #define VOUVPR 0x20
40 #define VOUIR 0x24
41 #define VOUSRR 0x28
42 #define VOUMSR 0x2c
43 #define VOUHIR 0x30
44 #define VOUDFR 0x34
45 #define VOUAD1R 0x38
46 #define VOUAD2R 0x3c
47 #define VOUAIR 0x40
48 #define VOUSWR 0x44
49 #define VOURCR 0x48
50 #define VOURPR 0x50
51
52 enum sh_vou_status {
53 SH_VOU_IDLE,
54 SH_VOU_INITIALISING,
55 SH_VOU_RUNNING,
56 };
57
58 #define VOU_MIN_IMAGE_WIDTH 16
59 #define VOU_MAX_IMAGE_WIDTH 720
60 #define VOU_MIN_IMAGE_HEIGHT 16
61
62 struct sh_vou_buffer {
63 struct vb2_v4l2_buffer vb;
64 struct list_head list;
65 };
66
67 static inline struct
to_sh_vou_buffer(struct vb2_v4l2_buffer * vb2)68 sh_vou_buffer *to_sh_vou_buffer(struct vb2_v4l2_buffer *vb2)
69 {
70 return container_of(vb2, struct sh_vou_buffer, vb);
71 }
72
73 struct sh_vou_device {
74 struct v4l2_device v4l2_dev;
75 struct video_device vdev;
76 struct sh_vou_pdata *pdata;
77 spinlock_t lock;
78 void __iomem *base;
79 /* State information */
80 struct v4l2_pix_format pix;
81 struct v4l2_rect rect;
82 struct list_head buf_list;
83 v4l2_std_id std;
84 int pix_idx;
85 struct vb2_queue queue;
86 struct sh_vou_buffer *active;
87 enum sh_vou_status status;
88 unsigned sequence;
89 struct mutex fop_lock;
90 };
91
92 /* Register access routines for sides A, B and mirror addresses */
sh_vou_reg_a_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)93 static void sh_vou_reg_a_write(struct sh_vou_device *vou_dev, unsigned int reg,
94 u32 value)
95 {
96 __raw_writel(value, vou_dev->base + reg);
97 }
98
sh_vou_reg_ab_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)99 static void sh_vou_reg_ab_write(struct sh_vou_device *vou_dev, unsigned int reg,
100 u32 value)
101 {
102 __raw_writel(value, vou_dev->base + reg);
103 __raw_writel(value, vou_dev->base + reg + 0x1000);
104 }
105
sh_vou_reg_m_write(struct sh_vou_device * vou_dev,unsigned int reg,u32 value)106 static void sh_vou_reg_m_write(struct sh_vou_device *vou_dev, unsigned int reg,
107 u32 value)
108 {
109 __raw_writel(value, vou_dev->base + reg + 0x2000);
110 }
111
sh_vou_reg_a_read(struct sh_vou_device * vou_dev,unsigned int reg)112 static u32 sh_vou_reg_a_read(struct sh_vou_device *vou_dev, unsigned int reg)
113 {
114 return __raw_readl(vou_dev->base + reg);
115 }
116
sh_vou_reg_a_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)117 static void sh_vou_reg_a_set(struct sh_vou_device *vou_dev, unsigned int reg,
118 u32 value, u32 mask)
119 {
120 u32 old = __raw_readl(vou_dev->base + reg);
121
122 value = (value & mask) | (old & ~mask);
123 __raw_writel(value, vou_dev->base + reg);
124 }
125
sh_vou_reg_b_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)126 static void sh_vou_reg_b_set(struct sh_vou_device *vou_dev, unsigned int reg,
127 u32 value, u32 mask)
128 {
129 sh_vou_reg_a_set(vou_dev, reg + 0x1000, value, mask);
130 }
131
sh_vou_reg_ab_set(struct sh_vou_device * vou_dev,unsigned int reg,u32 value,u32 mask)132 static void sh_vou_reg_ab_set(struct sh_vou_device *vou_dev, unsigned int reg,
133 u32 value, u32 mask)
134 {
135 sh_vou_reg_a_set(vou_dev, reg, value, mask);
136 sh_vou_reg_b_set(vou_dev, reg, value, mask);
137 }
138
139 struct sh_vou_fmt {
140 u32 pfmt;
141 unsigned char bpp;
142 unsigned char bpl;
143 unsigned char rgb;
144 unsigned char yf;
145 unsigned char pkf;
146 };
147
148 /* Further pixel formats can be added */
149 static struct sh_vou_fmt vou_fmt[] = {
150 {
151 .pfmt = V4L2_PIX_FMT_NV12,
152 .bpp = 12,
153 .bpl = 1,
154 .yf = 0,
155 .rgb = 0,
156 },
157 {
158 .pfmt = V4L2_PIX_FMT_NV16,
159 .bpp = 16,
160 .bpl = 1,
161 .yf = 1,
162 .rgb = 0,
163 },
164 {
165 .pfmt = V4L2_PIX_FMT_RGB24,
166 .bpp = 24,
167 .bpl = 3,
168 .pkf = 2,
169 .rgb = 1,
170 },
171 {
172 .pfmt = V4L2_PIX_FMT_RGB565,
173 .bpp = 16,
174 .bpl = 2,
175 .pkf = 3,
176 .rgb = 1,
177 },
178 {
179 .pfmt = V4L2_PIX_FMT_RGB565X,
180 .bpp = 16,
181 .bpl = 2,
182 .pkf = 3,
183 .rgb = 1,
184 },
185 };
186
sh_vou_schedule_next(struct sh_vou_device * vou_dev,struct vb2_v4l2_buffer * vbuf)187 static void sh_vou_schedule_next(struct sh_vou_device *vou_dev,
188 struct vb2_v4l2_buffer *vbuf)
189 {
190 dma_addr_t addr1, addr2;
191
192 addr1 = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0);
193 switch (vou_dev->pix.pixelformat) {
194 case V4L2_PIX_FMT_NV12:
195 case V4L2_PIX_FMT_NV16:
196 addr2 = addr1 + vou_dev->pix.width * vou_dev->pix.height;
197 break;
198 default:
199 addr2 = 0;
200 }
201
202 sh_vou_reg_m_write(vou_dev, VOUAD1R, addr1);
203 sh_vou_reg_m_write(vou_dev, VOUAD2R, addr2);
204 }
205
sh_vou_stream_config(struct sh_vou_device * vou_dev)206 static void sh_vou_stream_config(struct sh_vou_device *vou_dev)
207 {
208 unsigned int row_coeff;
209 #ifdef __LITTLE_ENDIAN
210 u32 dataswap = 7;
211 #else
212 u32 dataswap = 0;
213 #endif
214
215 switch (vou_dev->pix.pixelformat) {
216 default:
217 case V4L2_PIX_FMT_NV12:
218 case V4L2_PIX_FMT_NV16:
219 row_coeff = 1;
220 break;
221 case V4L2_PIX_FMT_RGB565:
222 dataswap ^= 1;
223 fallthrough;
224 case V4L2_PIX_FMT_RGB565X:
225 row_coeff = 2;
226 break;
227 case V4L2_PIX_FMT_RGB24:
228 row_coeff = 3;
229 break;
230 }
231
232 sh_vou_reg_a_write(vou_dev, VOUSWR, dataswap);
233 sh_vou_reg_ab_write(vou_dev, VOUAIR, vou_dev->pix.width * row_coeff);
234 }
235
236 /* Locking: caller holds fop_lock mutex */
sh_vou_queue_setup(struct vb2_queue * vq,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])237 static int sh_vou_queue_setup(struct vb2_queue *vq,
238 unsigned int *nbuffers, unsigned int *nplanes,
239 unsigned int sizes[], struct device *alloc_devs[])
240 {
241 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
242 struct v4l2_pix_format *pix = &vou_dev->pix;
243 int bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
244
245 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
246
247 if (*nplanes)
248 return sizes[0] < pix->height * bytes_per_line ? -EINVAL : 0;
249 *nplanes = 1;
250 sizes[0] = pix->height * bytes_per_line;
251 return 0;
252 }
253
sh_vou_buf_prepare(struct vb2_buffer * vb)254 static int sh_vou_buf_prepare(struct vb2_buffer *vb)
255 {
256 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
257 struct v4l2_pix_format *pix = &vou_dev->pix;
258 unsigned bytes_per_line = vou_fmt[vou_dev->pix_idx].bpp * pix->width / 8;
259 unsigned size = pix->height * bytes_per_line;
260
261 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
262
263 if (vb2_plane_size(vb, 0) < size) {
264 /* User buffer too small */
265 dev_warn(vou_dev->v4l2_dev.dev, "buffer too small (%lu < %u)\n",
266 vb2_plane_size(vb, 0), size);
267 return -EINVAL;
268 }
269
270 vb2_set_plane_payload(vb, 0, size);
271 return 0;
272 }
273
274 /* Locking: caller holds fop_lock mutex and vq->irqlock spinlock */
sh_vou_buf_queue(struct vb2_buffer * vb)275 static void sh_vou_buf_queue(struct vb2_buffer *vb)
276 {
277 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
278 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vb->vb2_queue);
279 struct sh_vou_buffer *shbuf = to_sh_vou_buffer(vbuf);
280 unsigned long flags;
281
282 spin_lock_irqsave(&vou_dev->lock, flags);
283 list_add_tail(&shbuf->list, &vou_dev->buf_list);
284 spin_unlock_irqrestore(&vou_dev->lock, flags);
285 }
286
sh_vou_start_streaming(struct vb2_queue * vq,unsigned int count)287 static int sh_vou_start_streaming(struct vb2_queue *vq, unsigned int count)
288 {
289 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
290 struct sh_vou_buffer *buf, *node;
291 int ret;
292
293 vou_dev->sequence = 0;
294 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
295 video, s_stream, 1);
296 if (ret < 0 && ret != -ENOIOCTLCMD) {
297 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
298 vb2_buffer_done(&buf->vb.vb2_buf,
299 VB2_BUF_STATE_QUEUED);
300 list_del(&buf->list);
301 }
302 vou_dev->active = NULL;
303 return ret;
304 }
305
306 buf = list_entry(vou_dev->buf_list.next, struct sh_vou_buffer, list);
307
308 vou_dev->active = buf;
309
310 /* Start from side A: we use mirror addresses, so, set B */
311 sh_vou_reg_a_write(vou_dev, VOURPR, 1);
312 dev_dbg(vou_dev->v4l2_dev.dev, "%s: first buffer status 0x%x\n",
313 __func__, sh_vou_reg_a_read(vou_dev, VOUSTR));
314 sh_vou_schedule_next(vou_dev, &buf->vb);
315
316 buf = list_entry(buf->list.next, struct sh_vou_buffer, list);
317
318 /* Second buffer - initialise register side B */
319 sh_vou_reg_a_write(vou_dev, VOURPR, 0);
320 sh_vou_schedule_next(vou_dev, &buf->vb);
321
322 /* Register side switching with frame VSYNC */
323 sh_vou_reg_a_write(vou_dev, VOURCR, 5);
324
325 sh_vou_stream_config(vou_dev);
326 /* Enable End-of-Frame (VSYNC) interrupts */
327 sh_vou_reg_a_write(vou_dev, VOUIR, 0x10004);
328
329 /* Two buffers on the queue - activate the hardware */
330 vou_dev->status = SH_VOU_RUNNING;
331 sh_vou_reg_a_write(vou_dev, VOUER, 0x107);
332 return 0;
333 }
334
sh_vou_stop_streaming(struct vb2_queue * vq)335 static void sh_vou_stop_streaming(struct vb2_queue *vq)
336 {
337 struct sh_vou_device *vou_dev = vb2_get_drv_priv(vq);
338 struct sh_vou_buffer *buf, *node;
339 unsigned long flags;
340
341 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0,
342 video, s_stream, 0);
343 /* disable output */
344 sh_vou_reg_a_set(vou_dev, VOUER, 0, 1);
345 /* ...but the current frame will complete */
346 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x30000);
347 msleep(50);
348 spin_lock_irqsave(&vou_dev->lock, flags);
349 list_for_each_entry_safe(buf, node, &vou_dev->buf_list, list) {
350 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
351 list_del(&buf->list);
352 }
353 vou_dev->active = NULL;
354 spin_unlock_irqrestore(&vou_dev->lock, flags);
355 }
356
357 static const struct vb2_ops sh_vou_qops = {
358 .queue_setup = sh_vou_queue_setup,
359 .buf_prepare = sh_vou_buf_prepare,
360 .buf_queue = sh_vou_buf_queue,
361 .start_streaming = sh_vou_start_streaming,
362 .stop_streaming = sh_vou_stop_streaming,
363 };
364
365 /* Video IOCTLs */
sh_vou_querycap(struct file * file,void * priv,struct v4l2_capability * cap)366 static int sh_vou_querycap(struct file *file, void *priv,
367 struct v4l2_capability *cap)
368 {
369 struct sh_vou_device *vou_dev = video_drvdata(file);
370
371 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
372
373 strscpy(cap->card, "SuperH VOU", sizeof(cap->card));
374 strscpy(cap->driver, "sh-vou", sizeof(cap->driver));
375 strscpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
376 return 0;
377 }
378
379 /* Enumerate formats, that the device can accept from the user */
sh_vou_enum_fmt_vid_out(struct file * file,void * priv,struct v4l2_fmtdesc * fmt)380 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
381 struct v4l2_fmtdesc *fmt)
382 {
383 struct sh_vou_device *vou_dev = video_drvdata(file);
384
385 if (fmt->index >= ARRAY_SIZE(vou_fmt))
386 return -EINVAL;
387
388 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
389
390 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
391
392 return 0;
393 }
394
sh_vou_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)395 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
396 struct v4l2_format *fmt)
397 {
398 struct sh_vou_device *vou_dev = video_drvdata(file);
399
400 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
401
402 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
403 fmt->fmt.pix = vou_dev->pix;
404
405 return 0;
406 }
407
408 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
409 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
410 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
411 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
412 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
413 static const unsigned char vou_scale_v_fld[] = {0, 1};
414
sh_vou_configure_geometry(struct sh_vou_device * vou_dev,int pix_idx,int w_idx,int h_idx)415 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
416 int pix_idx, int w_idx, int h_idx)
417 {
418 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
419 unsigned int black_left, black_top, width_max,
420 frame_in_height, frame_out_height, frame_out_top;
421 struct v4l2_rect *rect = &vou_dev->rect;
422 struct v4l2_pix_format *pix = &vou_dev->pix;
423 u32 vouvcr = 0, dsr_h, dsr_v;
424
425 if (vou_dev->std & V4L2_STD_525_60) {
426 width_max = 858;
427 /* height_max = 262; */
428 } else {
429 width_max = 864;
430 /* height_max = 312; */
431 }
432
433 frame_in_height = pix->height / 2;
434 frame_out_height = rect->height / 2;
435 frame_out_top = rect->top / 2;
436
437 /*
438 * Cropping scheme: max useful image is 720x480, and the total video
439 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
440 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
441 * of which the first 33 / 25 clocks HSYNC must be held active. This
442 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
443 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
444 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
445 * beyond DSR, specified on the left and top by the VPR register "black
446 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
447 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
448 * client requires, and that's exactly what leaves us 720 pixels for the
449 * image; we leave VPR[VVP] at default 20 for now, because the client
450 * doesn't seem to have any special requirements for it. Otherwise we
451 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
452 * the selected standard, and DPR and DSR are selected according to
453 * cropping. Q: how does the client detect the first valid line? Does
454 * HSYNC stay inactive during invalid (black) lines?
455 */
456 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
457 black_top = 20;
458
459 dsr_h = rect->width + rect->left;
460 dsr_v = frame_out_height + frame_out_top;
461
462 dev_dbg(vou_dev->v4l2_dev.dev,
463 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
464 pix->width, frame_in_height, black_left, black_top,
465 rect->left, frame_out_top, dsr_h, dsr_v);
466
467 /* VOUISR height - half of a frame height in frame mode */
468 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
469 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
470 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
471 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
472
473 /*
474 * if necessary, we could set VOUHIR to
475 * max(black_left + dsr_h, width_max) here
476 */
477
478 if (w_idx)
479 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
480 if (h_idx)
481 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
482
483 dev_dbg(vou_dev->v4l2_dev.dev, "0x%08x: scaling 0x%x\n",
484 fmt->pfmt, vouvcr);
485
486 /* To produce a colour bar for testing set bit 23 of VOUVCR */
487 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
488 sh_vou_reg_ab_write(vou_dev, VOUDFR,
489 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
490 }
491
492 struct sh_vou_geometry {
493 struct v4l2_rect output;
494 unsigned int in_width;
495 unsigned int in_height;
496 int scale_idx_h;
497 int scale_idx_v;
498 };
499
500 /*
501 * Find input geometry, that we can use to produce output, closest to the
502 * requested rectangle, using VOU scaling
503 */
vou_adjust_input(struct sh_vou_geometry * geo,v4l2_std_id std)504 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
505 {
506 /* The compiler cannot know, that best and idx will indeed be set */
507 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
508 int i, idx = 0;
509
510 if (std & V4L2_STD_525_60)
511 img_height_max = 480;
512 else
513 img_height_max = 576;
514
515 /* Image width must be a multiple of 4 */
516 v4l_bound_align_image(&geo->in_width,
517 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
518 &geo->in_height,
519 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
520
521 /* Select scales to come as close as possible to the output image */
522 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
523 unsigned int err;
524 unsigned int found = geo->output.width * vou_scale_h_den[i] /
525 vou_scale_h_num[i];
526
527 if (found > VOU_MAX_IMAGE_WIDTH)
528 /* scales increase */
529 break;
530
531 err = abs(found - geo->in_width);
532 if (err < best_err) {
533 best_err = err;
534 idx = i;
535 best = found;
536 }
537 if (!err)
538 break;
539 }
540
541 geo->in_width = best;
542 geo->scale_idx_h = idx;
543
544 best_err = UINT_MAX;
545
546 /* This loop can be replaced with one division */
547 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
548 unsigned int err;
549 unsigned int found = geo->output.height * vou_scale_v_den[i] /
550 vou_scale_v_num[i];
551
552 if (found > img_height_max)
553 /* scales increase */
554 break;
555
556 err = abs(found - geo->in_height);
557 if (err < best_err) {
558 best_err = err;
559 idx = i;
560 best = found;
561 }
562 if (!err)
563 break;
564 }
565
566 geo->in_height = best;
567 geo->scale_idx_v = idx;
568 }
569
570 /*
571 * Find output geometry, that we can produce, using VOU scaling, closest to
572 * the requested rectangle
573 */
vou_adjust_output(struct sh_vou_geometry * geo,v4l2_std_id std)574 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
575 {
576 unsigned int best_err = UINT_MAX, best = geo->in_width,
577 width_max, height_max, img_height_max;
578 int i, idx_h = 0, idx_v = 0;
579
580 if (std & V4L2_STD_525_60) {
581 width_max = 858;
582 height_max = 262 * 2;
583 img_height_max = 480;
584 } else {
585 width_max = 864;
586 height_max = 312 * 2;
587 img_height_max = 576;
588 }
589
590 /* Select scales to come as close as possible to the output image */
591 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
592 unsigned int err;
593 unsigned int found = geo->in_width * vou_scale_h_num[i] /
594 vou_scale_h_den[i];
595
596 if (found > VOU_MAX_IMAGE_WIDTH)
597 /* scales increase */
598 break;
599
600 err = abs(found - geo->output.width);
601 if (err < best_err) {
602 best_err = err;
603 idx_h = i;
604 best = found;
605 }
606 if (!err)
607 break;
608 }
609
610 geo->output.width = best;
611 geo->scale_idx_h = idx_h;
612 if (geo->output.left + best > width_max)
613 geo->output.left = width_max - best;
614
615 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
616 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
617
618 best_err = UINT_MAX;
619
620 /* This loop can be replaced with one division */
621 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
622 unsigned int err;
623 unsigned int found = geo->in_height * vou_scale_v_num[i] /
624 vou_scale_v_den[i];
625
626 if (found > img_height_max)
627 /* scales increase */
628 break;
629
630 err = abs(found - geo->output.height);
631 if (err < best_err) {
632 best_err = err;
633 idx_v = i;
634 best = found;
635 }
636 if (!err)
637 break;
638 }
639
640 geo->output.height = best;
641 geo->scale_idx_v = idx_v;
642 if (geo->output.top + best > height_max)
643 geo->output.top = height_max - best;
644
645 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
646 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
647 }
648
sh_vou_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)649 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
650 struct v4l2_format *fmt)
651 {
652 struct sh_vou_device *vou_dev = video_drvdata(file);
653 struct v4l2_pix_format *pix = &fmt->fmt.pix;
654 unsigned int img_height_max;
655 int pix_idx;
656
657 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
658
659 pix->field = V4L2_FIELD_INTERLACED;
660 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
661 pix->ycbcr_enc = pix->quantization = 0;
662
663 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
664 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
665 break;
666
667 if (pix_idx == ARRAY_SIZE(vou_fmt))
668 return -EINVAL;
669
670 if (vou_dev->std & V4L2_STD_525_60)
671 img_height_max = 480;
672 else
673 img_height_max = 576;
674
675 v4l_bound_align_image(&pix->width,
676 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
677 &pix->height,
678 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
679 pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
680 pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
681
682 return 0;
683 }
684
sh_vou_set_fmt_vid_out(struct sh_vou_device * vou_dev,struct v4l2_pix_format * pix)685 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
686 struct v4l2_pix_format *pix)
687 {
688 unsigned int img_height_max;
689 struct sh_vou_geometry geo;
690 struct v4l2_subdev_format format = {
691 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
692 /* Revisit: is this the correct code? */
693 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
694 .format.field = V4L2_FIELD_INTERLACED,
695 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
696 };
697 struct v4l2_mbus_framefmt *mbfmt = &format.format;
698 int pix_idx;
699 int ret;
700
701 if (vb2_is_busy(&vou_dev->queue))
702 return -EBUSY;
703
704 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
705 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
706 break;
707
708 geo.in_width = pix->width;
709 geo.in_height = pix->height;
710 geo.output = vou_dev->rect;
711
712 vou_adjust_output(&geo, vou_dev->std);
713
714 mbfmt->width = geo.output.width;
715 mbfmt->height = geo.output.height;
716 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
717 set_fmt, NULL, &format);
718 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
719 if (ret < 0)
720 return ret;
721
722 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
723 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
724
725 if (vou_dev->std & V4L2_STD_525_60)
726 img_height_max = 480;
727 else
728 img_height_max = 576;
729
730 /* Sanity checks */
731 if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
732 (unsigned)mbfmt->height > img_height_max ||
733 mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
734 return -EIO;
735
736 if (mbfmt->width != geo.output.width ||
737 mbfmt->height != geo.output.height) {
738 geo.output.width = mbfmt->width;
739 geo.output.height = mbfmt->height;
740
741 vou_adjust_input(&geo, vou_dev->std);
742 }
743
744 /* We tried to preserve output rectangle, but it could have changed */
745 vou_dev->rect = geo.output;
746 pix->width = geo.in_width;
747 pix->height = geo.in_height;
748
749 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
750 pix->width, pix->height);
751
752 vou_dev->pix_idx = pix_idx;
753
754 vou_dev->pix = *pix;
755
756 sh_vou_configure_geometry(vou_dev, pix_idx,
757 geo.scale_idx_h, geo.scale_idx_v);
758
759 return 0;
760 }
761
sh_vou_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)762 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
763 struct v4l2_format *fmt)
764 {
765 struct sh_vou_device *vou_dev = video_drvdata(file);
766 int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
767
768 if (ret)
769 return ret;
770 return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
771 }
772
sh_vou_enum_output(struct file * file,void * fh,struct v4l2_output * a)773 static int sh_vou_enum_output(struct file *file, void *fh,
774 struct v4l2_output *a)
775 {
776 struct sh_vou_device *vou_dev = video_drvdata(file);
777
778 if (a->index)
779 return -EINVAL;
780 strscpy(a->name, "Video Out", sizeof(a->name));
781 a->type = V4L2_OUTPUT_TYPE_ANALOG;
782 a->std = vou_dev->vdev.tvnorms;
783 return 0;
784 }
785
sh_vou_g_output(struct file * file,void * fh,unsigned int * i)786 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
787 {
788 *i = 0;
789 return 0;
790 }
791
sh_vou_s_output(struct file * file,void * fh,unsigned int i)792 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
793 {
794 return i ? -EINVAL : 0;
795 }
796
sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)797 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
798 {
799 switch (bus_fmt) {
800 default:
801 pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
802 __func__, bus_fmt);
803 fallthrough;
804 case SH_VOU_BUS_8BIT:
805 return 1;
806 case SH_VOU_BUS_16BIT:
807 return 0;
808 case SH_VOU_BUS_BT656:
809 return 3;
810 }
811 }
812
sh_vou_s_std(struct file * file,void * priv,v4l2_std_id std_id)813 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
814 {
815 struct sh_vou_device *vou_dev = video_drvdata(file);
816 int ret;
817
818 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
819
820 if (std_id == vou_dev->std)
821 return 0;
822
823 if (vb2_is_busy(&vou_dev->queue))
824 return -EBUSY;
825
826 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
827 s_std_output, std_id);
828 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
829 if (ret < 0 && ret != -ENOIOCTLCMD)
830 return ret;
831
832 vou_dev->rect.top = vou_dev->rect.left = 0;
833 vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
834 if (std_id & V4L2_STD_525_60) {
835 sh_vou_reg_ab_set(vou_dev, VOUCR,
836 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
837 vou_dev->rect.height = 480;
838 } else {
839 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
840 vou_dev->rect.height = 576;
841 }
842
843 vou_dev->pix.width = vou_dev->rect.width;
844 vou_dev->pix.height = vou_dev->rect.height;
845 vou_dev->pix.bytesperline =
846 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
847 vou_dev->pix.sizeimage = vou_dev->pix.height *
848 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
849 vou_dev->std = std_id;
850 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
851
852 return 0;
853 }
854
sh_vou_g_std(struct file * file,void * priv,v4l2_std_id * std)855 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
856 {
857 struct sh_vou_device *vou_dev = video_drvdata(file);
858
859 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
860
861 *std = vou_dev->std;
862
863 return 0;
864 }
865
sh_vou_log_status(struct file * file,void * priv)866 static int sh_vou_log_status(struct file *file, void *priv)
867 {
868 struct sh_vou_device *vou_dev = video_drvdata(file);
869
870 pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
871 pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
872 pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
873 pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
874 pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
875 pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
876 pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
877 pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
878 pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
879 pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
880 pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
881 pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
882 pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
883 pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
884 pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
885 pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
886 pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
887 pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
888 pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
889 pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
890 return 0;
891 }
892
sh_vou_g_selection(struct file * file,void * fh,struct v4l2_selection * sel)893 static int sh_vou_g_selection(struct file *file, void *fh,
894 struct v4l2_selection *sel)
895 {
896 struct sh_vou_device *vou_dev = video_drvdata(file);
897
898 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
899 return -EINVAL;
900 switch (sel->target) {
901 case V4L2_SEL_TGT_COMPOSE:
902 sel->r = vou_dev->rect;
903 break;
904 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
905 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
906 sel->r.left = 0;
907 sel->r.top = 0;
908 sel->r.width = VOU_MAX_IMAGE_WIDTH;
909 if (vou_dev->std & V4L2_STD_525_60)
910 sel->r.height = 480;
911 else
912 sel->r.height = 576;
913 break;
914 default:
915 return -EINVAL;
916 }
917 return 0;
918 }
919
920 /* Assume a dull encoder, do all the work ourselves. */
sh_vou_s_selection(struct file * file,void * fh,struct v4l2_selection * sel)921 static int sh_vou_s_selection(struct file *file, void *fh,
922 struct v4l2_selection *sel)
923 {
924 struct v4l2_rect *rect = &sel->r;
925 struct sh_vou_device *vou_dev = video_drvdata(file);
926 struct v4l2_subdev_selection sd_sel = {
927 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
928 .target = V4L2_SEL_TGT_COMPOSE,
929 };
930 struct v4l2_pix_format *pix = &vou_dev->pix;
931 struct sh_vou_geometry geo;
932 struct v4l2_subdev_format format = {
933 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
934 /* Revisit: is this the correct code? */
935 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
936 .format.field = V4L2_FIELD_INTERLACED,
937 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
938 };
939 unsigned int img_height_max;
940 int ret;
941
942 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
943 sel->target != V4L2_SEL_TGT_COMPOSE)
944 return -EINVAL;
945
946 if (vb2_is_busy(&vou_dev->queue))
947 return -EBUSY;
948
949 if (vou_dev->std & V4L2_STD_525_60)
950 img_height_max = 480;
951 else
952 img_height_max = 576;
953
954 v4l_bound_align_image(&rect->width,
955 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
956 &rect->height,
957 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
958
959 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
960 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
961
962 if (rect->height + rect->top > img_height_max)
963 rect->top = img_height_max - rect->height;
964
965 geo.output = *rect;
966 geo.in_width = pix->width;
967 geo.in_height = pix->height;
968
969 /* Configure the encoder one-to-one, position at 0, ignore errors */
970 sd_sel.r.width = geo.output.width;
971 sd_sel.r.height = geo.output.height;
972 /*
973 * We first issue a S_SELECTION, so that the subsequent S_FMT delivers the
974 * final encoder configuration.
975 */
976 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
977 set_selection, NULL, &sd_sel);
978 format.format.width = geo.output.width;
979 format.format.height = geo.output.height;
980 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
981 set_fmt, NULL, &format);
982 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
983 if (ret < 0)
984 return ret;
985
986 /* Sanity checks */
987 if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
988 (unsigned)format.format.height > img_height_max ||
989 format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
990 return -EIO;
991
992 geo.output.width = format.format.width;
993 geo.output.height = format.format.height;
994
995 /*
996 * No down-scaling. According to the API, current call has precedence:
997 * https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/crop.html#cropping-structures
998 */
999 vou_adjust_input(&geo, vou_dev->std);
1000
1001 /* We tried to preserve output rectangle, but it could have changed */
1002 vou_dev->rect = geo.output;
1003 pix->width = geo.in_width;
1004 pix->height = geo.in_height;
1005
1006 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1007 geo.scale_idx_h, geo.scale_idx_v);
1008
1009 return 0;
1010 }
1011
sh_vou_isr(int irq,void * dev_id)1012 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1013 {
1014 struct sh_vou_device *vou_dev = dev_id;
1015 static unsigned long j;
1016 struct sh_vou_buffer *vb;
1017 static int cnt;
1018 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1019 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1020
1021 if (!(irq_status & 0x300)) {
1022 if (printk_timed_ratelimit(&j, 500))
1023 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1024 irq_status);
1025 return IRQ_NONE;
1026 }
1027
1028 spin_lock(&vou_dev->lock);
1029 if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1030 if (printk_timed_ratelimit(&j, 500))
1031 dev_warn(vou_dev->v4l2_dev.dev,
1032 "IRQ without active buffer: %x!\n", irq_status);
1033 /* Just ack: buf_release will disable further interrupts */
1034 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1035 spin_unlock(&vou_dev->lock);
1036 return IRQ_HANDLED;
1037 }
1038
1039 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1040 dev_dbg(vou_dev->v4l2_dev.dev,
1041 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1042 irq_status, masked, vou_status, cnt);
1043
1044 cnt++;
1045 /* side = vou_status & 0x10000; */
1046
1047 /* Clear only set interrupts */
1048 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1049
1050 vb = vou_dev->active;
1051 if (list_is_singular(&vb->list)) {
1052 /* Keep cycling while no next buffer is available */
1053 sh_vou_schedule_next(vou_dev, &vb->vb);
1054 spin_unlock(&vou_dev->lock);
1055 return IRQ_HANDLED;
1056 }
1057
1058 list_del(&vb->list);
1059
1060 vb->vb.vb2_buf.timestamp = ktime_get_ns();
1061 vb->vb.sequence = vou_dev->sequence++;
1062 vb->vb.field = V4L2_FIELD_INTERLACED;
1063 vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1064
1065 vou_dev->active = list_entry(vou_dev->buf_list.next,
1066 struct sh_vou_buffer, list);
1067
1068 if (list_is_singular(&vou_dev->buf_list)) {
1069 /* Keep cycling while no next buffer is available */
1070 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1071 } else {
1072 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1073 struct sh_vou_buffer, list);
1074 sh_vou_schedule_next(vou_dev, &new->vb);
1075 }
1076
1077 spin_unlock(&vou_dev->lock);
1078
1079 return IRQ_HANDLED;
1080 }
1081
sh_vou_hw_init(struct sh_vou_device * vou_dev)1082 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1083 {
1084 struct sh_vou_pdata *pdata = vou_dev->pdata;
1085 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1086 int i = 100;
1087
1088 /* Disable all IRQs */
1089 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1090
1091 /* Reset VOU interfaces - registers unaffected */
1092 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1093 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1094 udelay(1);
1095
1096 if (!i)
1097 return -ETIMEDOUT;
1098
1099 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1100
1101 if (pdata->flags & SH_VOU_PCLK_FALLING)
1102 voucr |= 1 << 28;
1103 if (pdata->flags & SH_VOU_HSYNC_LOW)
1104 voucr |= 1 << 27;
1105 if (pdata->flags & SH_VOU_VSYNC_LOW)
1106 voucr |= 1 << 26;
1107 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1108
1109 /* Manual register side switching at first */
1110 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1111 /* Default - fixed HSYNC length, can be made configurable is required */
1112 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1113
1114 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1115
1116 return 0;
1117 }
1118
1119 /* File operations */
sh_vou_open(struct file * file)1120 static int sh_vou_open(struct file *file)
1121 {
1122 struct sh_vou_device *vou_dev = video_drvdata(file);
1123 int err;
1124
1125 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1126 return -ERESTARTSYS;
1127
1128 err = v4l2_fh_open(file);
1129 if (err)
1130 goto done_open;
1131 if (v4l2_fh_is_singular_file(file) &&
1132 vou_dev->status == SH_VOU_INITIALISING) {
1133 /* First open */
1134 err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev);
1135 if (err < 0) {
1136 v4l2_fh_release(file);
1137 goto done_open;
1138 }
1139 err = sh_vou_hw_init(vou_dev);
1140 if (err < 0) {
1141 pm_runtime_put(vou_dev->v4l2_dev.dev);
1142 v4l2_fh_release(file);
1143 } else {
1144 vou_dev->status = SH_VOU_IDLE;
1145 }
1146 }
1147 done_open:
1148 mutex_unlock(&vou_dev->fop_lock);
1149 return err;
1150 }
1151
sh_vou_release(struct file * file)1152 static int sh_vou_release(struct file *file)
1153 {
1154 struct sh_vou_device *vou_dev = video_drvdata(file);
1155 bool is_last;
1156
1157 mutex_lock(&vou_dev->fop_lock);
1158 is_last = v4l2_fh_is_singular_file(file);
1159 _vb2_fop_release(file, NULL);
1160 if (is_last) {
1161 /* Last close */
1162 vou_dev->status = SH_VOU_INITIALISING;
1163 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1164 pm_runtime_put(vou_dev->v4l2_dev.dev);
1165 }
1166 mutex_unlock(&vou_dev->fop_lock);
1167 return 0;
1168 }
1169
1170 /* sh_vou display ioctl operations */
1171 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1172 .vidioc_querycap = sh_vou_querycap,
1173 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1174 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1175 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1176 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1177 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1178 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1179 .vidioc_querybuf = vb2_ioctl_querybuf,
1180 .vidioc_qbuf = vb2_ioctl_qbuf,
1181 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1182 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1183 .vidioc_streamon = vb2_ioctl_streamon,
1184 .vidioc_streamoff = vb2_ioctl_streamoff,
1185 .vidioc_expbuf = vb2_ioctl_expbuf,
1186 .vidioc_g_output = sh_vou_g_output,
1187 .vidioc_s_output = sh_vou_s_output,
1188 .vidioc_enum_output = sh_vou_enum_output,
1189 .vidioc_s_std = sh_vou_s_std,
1190 .vidioc_g_std = sh_vou_g_std,
1191 .vidioc_g_selection = sh_vou_g_selection,
1192 .vidioc_s_selection = sh_vou_s_selection,
1193 .vidioc_log_status = sh_vou_log_status,
1194 };
1195
1196 static const struct v4l2_file_operations sh_vou_fops = {
1197 .owner = THIS_MODULE,
1198 .open = sh_vou_open,
1199 .release = sh_vou_release,
1200 .unlocked_ioctl = video_ioctl2,
1201 .mmap = vb2_fop_mmap,
1202 .poll = vb2_fop_poll,
1203 .write = vb2_fop_write,
1204 };
1205
1206 static const struct video_device sh_vou_video_template = {
1207 .name = "sh_vou",
1208 .fops = &sh_vou_fops,
1209 .ioctl_ops = &sh_vou_ioctl_ops,
1210 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1211 .vfl_dir = VFL_DIR_TX,
1212 .device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
1213 V4L2_CAP_STREAMING,
1214 };
1215
sh_vou_probe(struct platform_device * pdev)1216 static int sh_vou_probe(struct platform_device *pdev)
1217 {
1218 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1219 struct v4l2_rect *rect;
1220 struct v4l2_pix_format *pix;
1221 struct i2c_adapter *i2c_adap;
1222 struct video_device *vdev;
1223 struct sh_vou_device *vou_dev;
1224 struct v4l2_subdev *subdev;
1225 struct vb2_queue *q;
1226 int irq, ret;
1227
1228 if (!vou_pdata) {
1229 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1230 return -ENODEV;
1231 }
1232
1233 irq = platform_get_irq(pdev, 0);
1234 if (irq < 0)
1235 return irq;
1236
1237 vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1238 if (!vou_dev)
1239 return -ENOMEM;
1240
1241 INIT_LIST_HEAD(&vou_dev->buf_list);
1242 spin_lock_init(&vou_dev->lock);
1243 mutex_init(&vou_dev->fop_lock);
1244 vou_dev->pdata = vou_pdata;
1245 vou_dev->status = SH_VOU_INITIALISING;
1246 vou_dev->pix_idx = 1;
1247
1248 rect = &vou_dev->rect;
1249 pix = &vou_dev->pix;
1250
1251 /* Fill in defaults */
1252 vou_dev->std = V4L2_STD_NTSC_M;
1253 rect->left = 0;
1254 rect->top = 0;
1255 rect->width = VOU_MAX_IMAGE_WIDTH;
1256 rect->height = 480;
1257 pix->width = VOU_MAX_IMAGE_WIDTH;
1258 pix->height = 480;
1259 pix->pixelformat = V4L2_PIX_FMT_NV16;
1260 pix->field = V4L2_FIELD_INTERLACED;
1261 pix->bytesperline = VOU_MAX_IMAGE_WIDTH;
1262 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1263 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1264
1265 vou_dev->base = devm_platform_ioremap_resource(pdev, 0);
1266 if (IS_ERR(vou_dev->base))
1267 return PTR_ERR(vou_dev->base);
1268
1269 ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1270 if (ret < 0)
1271 return ret;
1272
1273 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1274 if (ret < 0) {
1275 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1276 return ret;
1277 }
1278
1279 vdev = &vou_dev->vdev;
1280 *vdev = sh_vou_video_template;
1281 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1282 vdev->tvnorms |= V4L2_STD_PAL;
1283 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1284 vdev->release = video_device_release_empty;
1285 vdev->lock = &vou_dev->fop_lock;
1286
1287 video_set_drvdata(vdev, vou_dev);
1288
1289 /* Initialize the vb2 queue */
1290 q = &vou_dev->queue;
1291 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1292 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1293 q->drv_priv = vou_dev;
1294 q->buf_struct_size = sizeof(struct sh_vou_buffer);
1295 q->ops = &sh_vou_qops;
1296 q->mem_ops = &vb2_dma_contig_memops;
1297 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1298 q->min_queued_buffers = 2;
1299 q->lock = &vou_dev->fop_lock;
1300 q->dev = &pdev->dev;
1301 ret = vb2_queue_init(q);
1302 if (ret)
1303 goto ei2cgadap;
1304
1305 vdev->queue = q;
1306 INIT_LIST_HEAD(&vou_dev->buf_list);
1307
1308 pm_runtime_enable(&pdev->dev);
1309 pm_runtime_resume(&pdev->dev);
1310
1311 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1312 if (!i2c_adap) {
1313 ret = -ENODEV;
1314 goto ei2cgadap;
1315 }
1316
1317 ret = sh_vou_hw_init(vou_dev);
1318 if (ret < 0)
1319 goto ereset;
1320
1321 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1322 vou_pdata->board_info, NULL);
1323 if (!subdev) {
1324 ret = -ENOMEM;
1325 goto ei2cnd;
1326 }
1327
1328 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
1329 if (ret < 0)
1330 goto evregdev;
1331
1332 return 0;
1333
1334 evregdev:
1335 ei2cnd:
1336 ereset:
1337 i2c_put_adapter(i2c_adap);
1338 ei2cgadap:
1339 pm_runtime_disable(&pdev->dev);
1340 v4l2_device_unregister(&vou_dev->v4l2_dev);
1341 return ret;
1342 }
1343
sh_vou_remove(struct platform_device * pdev)1344 static void sh_vou_remove(struct platform_device *pdev)
1345 {
1346 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1347 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1348 struct sh_vou_device, v4l2_dev);
1349 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1350 struct v4l2_subdev, list);
1351 struct i2c_client *client = v4l2_get_subdevdata(sd);
1352
1353 pm_runtime_disable(&pdev->dev);
1354 video_unregister_device(&vou_dev->vdev);
1355 i2c_put_adapter(client->adapter);
1356 v4l2_device_unregister(&vou_dev->v4l2_dev);
1357 }
1358
1359 static struct platform_driver sh_vou = {
1360 .remove = sh_vou_remove,
1361 .driver = {
1362 .name = "sh-vou",
1363 },
1364 };
1365
1366 module_platform_driver_probe(sh_vou, sh_vou_probe);
1367
1368 MODULE_DESCRIPTION("SuperH VOU driver");
1369 MODULE_AUTHOR("Guennadi Liakhovetski <[email protected]>");
1370 MODULE_LICENSE("GPL v2");
1371 MODULE_VERSION("0.1.0");
1372 MODULE_ALIAS("platform:sh-vou");
1373