1 // SPDX-License-Identifier: GPL-2.0
2 /*
3 * SuperH Video Output Unit (VOU) driver
4 *
5 * Copyright (C) 2010, Guennadi Liakhovetski <g.liakhovetski@gmx.de>
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 .wait_prepare = vb2_ops_wait_prepare,
364 .wait_finish = vb2_ops_wait_finish,
365 };
366
367 /* Video IOCTLs */
sh_vou_querycap(struct file * file,void * priv,struct v4l2_capability * cap)368 static int sh_vou_querycap(struct file *file, void *priv,
369 struct v4l2_capability *cap)
370 {
371 struct sh_vou_device *vou_dev = video_drvdata(file);
372
373 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
374
375 strscpy(cap->card, "SuperH VOU", sizeof(cap->card));
376 strscpy(cap->driver, "sh-vou", sizeof(cap->driver));
377 strscpy(cap->bus_info, "platform:sh-vou", sizeof(cap->bus_info));
378 return 0;
379 }
380
381 /* 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)382 static int sh_vou_enum_fmt_vid_out(struct file *file, void *priv,
383 struct v4l2_fmtdesc *fmt)
384 {
385 struct sh_vou_device *vou_dev = video_drvdata(file);
386
387 if (fmt->index >= ARRAY_SIZE(vou_fmt))
388 return -EINVAL;
389
390 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
391
392 fmt->pixelformat = vou_fmt[fmt->index].pfmt;
393
394 return 0;
395 }
396
sh_vou_g_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)397 static int sh_vou_g_fmt_vid_out(struct file *file, void *priv,
398 struct v4l2_format *fmt)
399 {
400 struct sh_vou_device *vou_dev = video_drvdata(file);
401
402 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
403
404 fmt->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
405 fmt->fmt.pix = vou_dev->pix;
406
407 return 0;
408 }
409
410 static const unsigned char vou_scale_h_num[] = {1, 9, 2, 9, 4};
411 static const unsigned char vou_scale_h_den[] = {1, 8, 1, 4, 1};
412 static const unsigned char vou_scale_h_fld[] = {0, 2, 1, 3};
413 static const unsigned char vou_scale_v_num[] = {1, 2, 4};
414 static const unsigned char vou_scale_v_den[] = {1, 1, 1};
415 static const unsigned char vou_scale_v_fld[] = {0, 1};
416
sh_vou_configure_geometry(struct sh_vou_device * vou_dev,int pix_idx,int w_idx,int h_idx)417 static void sh_vou_configure_geometry(struct sh_vou_device *vou_dev,
418 int pix_idx, int w_idx, int h_idx)
419 {
420 struct sh_vou_fmt *fmt = vou_fmt + pix_idx;
421 unsigned int black_left, black_top, width_max,
422 frame_in_height, frame_out_height, frame_out_top;
423 struct v4l2_rect *rect = &vou_dev->rect;
424 struct v4l2_pix_format *pix = &vou_dev->pix;
425 u32 vouvcr = 0, dsr_h, dsr_v;
426
427 if (vou_dev->std & V4L2_STD_525_60) {
428 width_max = 858;
429 /* height_max = 262; */
430 } else {
431 width_max = 864;
432 /* height_max = 312; */
433 }
434
435 frame_in_height = pix->height / 2;
436 frame_out_height = rect->height / 2;
437 frame_out_top = rect->top / 2;
438
439 /*
440 * Cropping scheme: max useful image is 720x480, and the total video
441 * area is 858x525 (NTSC) or 864x625 (PAL). AK8813 / 8814 starts
442 * sampling data beginning with fixed 276th (NTSC) / 288th (PAL) clock,
443 * of which the first 33 / 25 clocks HSYNC must be held active. This
444 * has to be configured in CR[HW]. 1 pixel equals 2 clock periods.
445 * This gives CR[HW] = 16 / 12, VPR[HVP] = 138 / 144, which gives
446 * exactly 858 - 138 = 864 - 144 = 720! We call the out-of-display area,
447 * beyond DSR, specified on the left and top by the VPR register "black
448 * pixels" and out-of-image area (DPR) "background pixels." We fix VPR
449 * at 138 / 144 : 20, because that's the HSYNC timing, that our first
450 * client requires, and that's exactly what leaves us 720 pixels for the
451 * image; we leave VPR[VVP] at default 20 for now, because the client
452 * doesn't seem to have any special requirements for it. Otherwise we
453 * could also set it to max - 240 = 22 / 72. Thus VPR depends only on
454 * the selected standard, and DPR and DSR are selected according to
455 * cropping. Q: how does the client detect the first valid line? Does
456 * HSYNC stay inactive during invalid (black) lines?
457 */
458 black_left = width_max - VOU_MAX_IMAGE_WIDTH;
459 black_top = 20;
460
461 dsr_h = rect->width + rect->left;
462 dsr_v = frame_out_height + frame_out_top;
463
464 dev_dbg(vou_dev->v4l2_dev.dev,
465 "image %ux%u, black %u:%u, offset %u:%u, display %ux%u\n",
466 pix->width, frame_in_height, black_left, black_top,
467 rect->left, frame_out_top, dsr_h, dsr_v);
468
469 /* VOUISR height - half of a frame height in frame mode */
470 sh_vou_reg_ab_write(vou_dev, VOUISR, (pix->width << 16) | frame_in_height);
471 sh_vou_reg_ab_write(vou_dev, VOUVPR, (black_left << 16) | black_top);
472 sh_vou_reg_ab_write(vou_dev, VOUDPR, (rect->left << 16) | frame_out_top);
473 sh_vou_reg_ab_write(vou_dev, VOUDSR, (dsr_h << 16) | dsr_v);
474
475 /*
476 * if necessary, we could set VOUHIR to
477 * max(black_left + dsr_h, width_max) here
478 */
479
480 if (w_idx)
481 vouvcr |= (1 << 15) | (vou_scale_h_fld[w_idx - 1] << 4);
482 if (h_idx)
483 vouvcr |= (1 << 14) | vou_scale_v_fld[h_idx - 1];
484
485 dev_dbg(vou_dev->v4l2_dev.dev, "0x%08x: scaling 0x%x\n",
486 fmt->pfmt, vouvcr);
487
488 /* To produce a colour bar for testing set bit 23 of VOUVCR */
489 sh_vou_reg_ab_write(vou_dev, VOUVCR, vouvcr);
490 sh_vou_reg_ab_write(vou_dev, VOUDFR,
491 fmt->pkf | (fmt->yf << 8) | (fmt->rgb << 16));
492 }
493
494 struct sh_vou_geometry {
495 struct v4l2_rect output;
496 unsigned int in_width;
497 unsigned int in_height;
498 int scale_idx_h;
499 int scale_idx_v;
500 };
501
502 /*
503 * Find input geometry, that we can use to produce output, closest to the
504 * requested rectangle, using VOU scaling
505 */
vou_adjust_input(struct sh_vou_geometry * geo,v4l2_std_id std)506 static void vou_adjust_input(struct sh_vou_geometry *geo, v4l2_std_id std)
507 {
508 /* The compiler cannot know, that best and idx will indeed be set */
509 unsigned int best_err = UINT_MAX, best = 0, img_height_max;
510 int i, idx = 0;
511
512 if (std & V4L2_STD_525_60)
513 img_height_max = 480;
514 else
515 img_height_max = 576;
516
517 /* Image width must be a multiple of 4 */
518 v4l_bound_align_image(&geo->in_width,
519 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
520 &geo->in_height,
521 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
522
523 /* Select scales to come as close as possible to the output image */
524 for (i = ARRAY_SIZE(vou_scale_h_num) - 1; i >= 0; i--) {
525 unsigned int err;
526 unsigned int found = geo->output.width * vou_scale_h_den[i] /
527 vou_scale_h_num[i];
528
529 if (found > VOU_MAX_IMAGE_WIDTH)
530 /* scales increase */
531 break;
532
533 err = abs(found - geo->in_width);
534 if (err < best_err) {
535 best_err = err;
536 idx = i;
537 best = found;
538 }
539 if (!err)
540 break;
541 }
542
543 geo->in_width = best;
544 geo->scale_idx_h = idx;
545
546 best_err = UINT_MAX;
547
548 /* This loop can be replaced with one division */
549 for (i = ARRAY_SIZE(vou_scale_v_num) - 1; i >= 0; i--) {
550 unsigned int err;
551 unsigned int found = geo->output.height * vou_scale_v_den[i] /
552 vou_scale_v_num[i];
553
554 if (found > img_height_max)
555 /* scales increase */
556 break;
557
558 err = abs(found - geo->in_height);
559 if (err < best_err) {
560 best_err = err;
561 idx = i;
562 best = found;
563 }
564 if (!err)
565 break;
566 }
567
568 geo->in_height = best;
569 geo->scale_idx_v = idx;
570 }
571
572 /*
573 * Find output geometry, that we can produce, using VOU scaling, closest to
574 * the requested rectangle
575 */
vou_adjust_output(struct sh_vou_geometry * geo,v4l2_std_id std)576 static void vou_adjust_output(struct sh_vou_geometry *geo, v4l2_std_id std)
577 {
578 unsigned int best_err = UINT_MAX, best = geo->in_width,
579 width_max, height_max, img_height_max;
580 int i, idx_h = 0, idx_v = 0;
581
582 if (std & V4L2_STD_525_60) {
583 width_max = 858;
584 height_max = 262 * 2;
585 img_height_max = 480;
586 } else {
587 width_max = 864;
588 height_max = 312 * 2;
589 img_height_max = 576;
590 }
591
592 /* Select scales to come as close as possible to the output image */
593 for (i = 0; i < ARRAY_SIZE(vou_scale_h_num); i++) {
594 unsigned int err;
595 unsigned int found = geo->in_width * vou_scale_h_num[i] /
596 vou_scale_h_den[i];
597
598 if (found > VOU_MAX_IMAGE_WIDTH)
599 /* scales increase */
600 break;
601
602 err = abs(found - geo->output.width);
603 if (err < best_err) {
604 best_err = err;
605 idx_h = i;
606 best = found;
607 }
608 if (!err)
609 break;
610 }
611
612 geo->output.width = best;
613 geo->scale_idx_h = idx_h;
614 if (geo->output.left + best > width_max)
615 geo->output.left = width_max - best;
616
617 pr_debug("%s(): W %u * %u/%u = %u\n", __func__, geo->in_width,
618 vou_scale_h_num[idx_h], vou_scale_h_den[idx_h], best);
619
620 best_err = UINT_MAX;
621
622 /* This loop can be replaced with one division */
623 for (i = 0; i < ARRAY_SIZE(vou_scale_v_num); i++) {
624 unsigned int err;
625 unsigned int found = geo->in_height * vou_scale_v_num[i] /
626 vou_scale_v_den[i];
627
628 if (found > img_height_max)
629 /* scales increase */
630 break;
631
632 err = abs(found - geo->output.height);
633 if (err < best_err) {
634 best_err = err;
635 idx_v = i;
636 best = found;
637 }
638 if (!err)
639 break;
640 }
641
642 geo->output.height = best;
643 geo->scale_idx_v = idx_v;
644 if (geo->output.top + best > height_max)
645 geo->output.top = height_max - best;
646
647 pr_debug("%s(): H %u * %u/%u = %u\n", __func__, geo->in_height,
648 vou_scale_v_num[idx_v], vou_scale_v_den[idx_v], best);
649 }
650
sh_vou_try_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)651 static int sh_vou_try_fmt_vid_out(struct file *file, void *priv,
652 struct v4l2_format *fmt)
653 {
654 struct sh_vou_device *vou_dev = video_drvdata(file);
655 struct v4l2_pix_format *pix = &fmt->fmt.pix;
656 unsigned int img_height_max;
657 int pix_idx;
658
659 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
660
661 pix->field = V4L2_FIELD_INTERLACED;
662 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
663 pix->ycbcr_enc = pix->quantization = 0;
664
665 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
666 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
667 break;
668
669 if (pix_idx == ARRAY_SIZE(vou_fmt))
670 return -EINVAL;
671
672 if (vou_dev->std & V4L2_STD_525_60)
673 img_height_max = 480;
674 else
675 img_height_max = 576;
676
677 v4l_bound_align_image(&pix->width,
678 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 2,
679 &pix->height,
680 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
681 pix->bytesperline = pix->width * vou_fmt[pix_idx].bpl;
682 pix->sizeimage = pix->height * ((pix->width * vou_fmt[pix_idx].bpp) >> 3);
683
684 return 0;
685 }
686
sh_vou_set_fmt_vid_out(struct sh_vou_device * vou_dev,struct v4l2_pix_format * pix)687 static int sh_vou_set_fmt_vid_out(struct sh_vou_device *vou_dev,
688 struct v4l2_pix_format *pix)
689 {
690 unsigned int img_height_max;
691 struct sh_vou_geometry geo;
692 struct v4l2_subdev_format format = {
693 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
694 /* Revisit: is this the correct code? */
695 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
696 .format.field = V4L2_FIELD_INTERLACED,
697 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
698 };
699 struct v4l2_mbus_framefmt *mbfmt = &format.format;
700 int pix_idx;
701 int ret;
702
703 if (vb2_is_busy(&vou_dev->queue))
704 return -EBUSY;
705
706 for (pix_idx = 0; pix_idx < ARRAY_SIZE(vou_fmt); pix_idx++)
707 if (vou_fmt[pix_idx].pfmt == pix->pixelformat)
708 break;
709
710 geo.in_width = pix->width;
711 geo.in_height = pix->height;
712 geo.output = vou_dev->rect;
713
714 vou_adjust_output(&geo, vou_dev->std);
715
716 mbfmt->width = geo.output.width;
717 mbfmt->height = geo.output.height;
718 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
719 set_fmt, NULL, &format);
720 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
721 if (ret < 0)
722 return ret;
723
724 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u -> %ux%u\n", __func__,
725 geo.output.width, geo.output.height, mbfmt->width, mbfmt->height);
726
727 if (vou_dev->std & V4L2_STD_525_60)
728 img_height_max = 480;
729 else
730 img_height_max = 576;
731
732 /* Sanity checks */
733 if ((unsigned)mbfmt->width > VOU_MAX_IMAGE_WIDTH ||
734 (unsigned)mbfmt->height > img_height_max ||
735 mbfmt->code != MEDIA_BUS_FMT_YUYV8_2X8)
736 return -EIO;
737
738 if (mbfmt->width != geo.output.width ||
739 mbfmt->height != geo.output.height) {
740 geo.output.width = mbfmt->width;
741 geo.output.height = mbfmt->height;
742
743 vou_adjust_input(&geo, vou_dev->std);
744 }
745
746 /* We tried to preserve output rectangle, but it could have changed */
747 vou_dev->rect = geo.output;
748 pix->width = geo.in_width;
749 pix->height = geo.in_height;
750
751 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): %ux%u\n", __func__,
752 pix->width, pix->height);
753
754 vou_dev->pix_idx = pix_idx;
755
756 vou_dev->pix = *pix;
757
758 sh_vou_configure_geometry(vou_dev, pix_idx,
759 geo.scale_idx_h, geo.scale_idx_v);
760
761 return 0;
762 }
763
sh_vou_s_fmt_vid_out(struct file * file,void * priv,struct v4l2_format * fmt)764 static int sh_vou_s_fmt_vid_out(struct file *file, void *priv,
765 struct v4l2_format *fmt)
766 {
767 struct sh_vou_device *vou_dev = video_drvdata(file);
768 int ret = sh_vou_try_fmt_vid_out(file, priv, fmt);
769
770 if (ret)
771 return ret;
772 return sh_vou_set_fmt_vid_out(vou_dev, &fmt->fmt.pix);
773 }
774
sh_vou_enum_output(struct file * file,void * fh,struct v4l2_output * a)775 static int sh_vou_enum_output(struct file *file, void *fh,
776 struct v4l2_output *a)
777 {
778 struct sh_vou_device *vou_dev = video_drvdata(file);
779
780 if (a->index)
781 return -EINVAL;
782 strscpy(a->name, "Video Out", sizeof(a->name));
783 a->type = V4L2_OUTPUT_TYPE_ANALOG;
784 a->std = vou_dev->vdev.tvnorms;
785 return 0;
786 }
787
sh_vou_g_output(struct file * file,void * fh,unsigned int * i)788 static int sh_vou_g_output(struct file *file, void *fh, unsigned int *i)
789 {
790 *i = 0;
791 return 0;
792 }
793
sh_vou_s_output(struct file * file,void * fh,unsigned int i)794 static int sh_vou_s_output(struct file *file, void *fh, unsigned int i)
795 {
796 return i ? -EINVAL : 0;
797 }
798
sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)799 static u32 sh_vou_ntsc_mode(enum sh_vou_bus_fmt bus_fmt)
800 {
801 switch (bus_fmt) {
802 default:
803 pr_warn("%s(): Invalid bus-format code %d, using default 8-bit\n",
804 __func__, bus_fmt);
805 fallthrough;
806 case SH_VOU_BUS_8BIT:
807 return 1;
808 case SH_VOU_BUS_16BIT:
809 return 0;
810 case SH_VOU_BUS_BT656:
811 return 3;
812 }
813 }
814
sh_vou_s_std(struct file * file,void * priv,v4l2_std_id std_id)815 static int sh_vou_s_std(struct file *file, void *priv, v4l2_std_id std_id)
816 {
817 struct sh_vou_device *vou_dev = video_drvdata(file);
818 int ret;
819
820 dev_dbg(vou_dev->v4l2_dev.dev, "%s(): 0x%llx\n", __func__, std_id);
821
822 if (std_id == vou_dev->std)
823 return 0;
824
825 if (vb2_is_busy(&vou_dev->queue))
826 return -EBUSY;
827
828 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, video,
829 s_std_output, std_id);
830 /* Shall we continue, if the subdev doesn't support .s_std_output()? */
831 if (ret < 0 && ret != -ENOIOCTLCMD)
832 return ret;
833
834 vou_dev->rect.top = vou_dev->rect.left = 0;
835 vou_dev->rect.width = VOU_MAX_IMAGE_WIDTH;
836 if (std_id & V4L2_STD_525_60) {
837 sh_vou_reg_ab_set(vou_dev, VOUCR,
838 sh_vou_ntsc_mode(vou_dev->pdata->bus_fmt) << 29, 7 << 29);
839 vou_dev->rect.height = 480;
840 } else {
841 sh_vou_reg_ab_set(vou_dev, VOUCR, 5 << 29, 7 << 29);
842 vou_dev->rect.height = 576;
843 }
844
845 vou_dev->pix.width = vou_dev->rect.width;
846 vou_dev->pix.height = vou_dev->rect.height;
847 vou_dev->pix.bytesperline =
848 vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpl;
849 vou_dev->pix.sizeimage = vou_dev->pix.height *
850 ((vou_dev->pix.width * vou_fmt[vou_dev->pix_idx].bpp) >> 3);
851 vou_dev->std = std_id;
852 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
853
854 return 0;
855 }
856
sh_vou_g_std(struct file * file,void * priv,v4l2_std_id * std)857 static int sh_vou_g_std(struct file *file, void *priv, v4l2_std_id *std)
858 {
859 struct sh_vou_device *vou_dev = video_drvdata(file);
860
861 dev_dbg(vou_dev->v4l2_dev.dev, "%s()\n", __func__);
862
863 *std = vou_dev->std;
864
865 return 0;
866 }
867
sh_vou_log_status(struct file * file,void * priv)868 static int sh_vou_log_status(struct file *file, void *priv)
869 {
870 struct sh_vou_device *vou_dev = video_drvdata(file);
871
872 pr_info("VOUER: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUER));
873 pr_info("VOUCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUCR));
874 pr_info("VOUSTR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSTR));
875 pr_info("VOUVCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVCR));
876 pr_info("VOUISR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUISR));
877 pr_info("VOUBCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUBCR));
878 pr_info("VOUDPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDPR));
879 pr_info("VOUDSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDSR));
880 pr_info("VOUVPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUVPR));
881 pr_info("VOUIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUIR));
882 pr_info("VOUSRR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSRR));
883 pr_info("VOUMSR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUMSR));
884 pr_info("VOUHIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUHIR));
885 pr_info("VOUDFR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUDFR));
886 pr_info("VOUAD1R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD1R));
887 pr_info("VOUAD2R: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAD2R));
888 pr_info("VOUAIR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUAIR));
889 pr_info("VOUSWR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOUSWR));
890 pr_info("VOURCR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURCR));
891 pr_info("VOURPR: 0x%08x\n", sh_vou_reg_a_read(vou_dev, VOURPR));
892 return 0;
893 }
894
sh_vou_g_selection(struct file * file,void * fh,struct v4l2_selection * sel)895 static int sh_vou_g_selection(struct file *file, void *fh,
896 struct v4l2_selection *sel)
897 {
898 struct sh_vou_device *vou_dev = video_drvdata(file);
899
900 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT)
901 return -EINVAL;
902 switch (sel->target) {
903 case V4L2_SEL_TGT_COMPOSE:
904 sel->r = vou_dev->rect;
905 break;
906 case V4L2_SEL_TGT_COMPOSE_DEFAULT:
907 case V4L2_SEL_TGT_COMPOSE_BOUNDS:
908 sel->r.left = 0;
909 sel->r.top = 0;
910 sel->r.width = VOU_MAX_IMAGE_WIDTH;
911 if (vou_dev->std & V4L2_STD_525_60)
912 sel->r.height = 480;
913 else
914 sel->r.height = 576;
915 break;
916 default:
917 return -EINVAL;
918 }
919 return 0;
920 }
921
922 /* Assume a dull encoder, do all the work ourselves. */
sh_vou_s_selection(struct file * file,void * fh,struct v4l2_selection * sel)923 static int sh_vou_s_selection(struct file *file, void *fh,
924 struct v4l2_selection *sel)
925 {
926 struct v4l2_rect *rect = &sel->r;
927 struct sh_vou_device *vou_dev = video_drvdata(file);
928 struct v4l2_subdev_selection sd_sel = {
929 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
930 .target = V4L2_SEL_TGT_COMPOSE,
931 };
932 struct v4l2_pix_format *pix = &vou_dev->pix;
933 struct sh_vou_geometry geo;
934 struct v4l2_subdev_format format = {
935 .which = V4L2_SUBDEV_FORMAT_ACTIVE,
936 /* Revisit: is this the correct code? */
937 .format.code = MEDIA_BUS_FMT_YUYV8_2X8,
938 .format.field = V4L2_FIELD_INTERLACED,
939 .format.colorspace = V4L2_COLORSPACE_SMPTE170M,
940 };
941 unsigned int img_height_max;
942 int ret;
943
944 if (sel->type != V4L2_BUF_TYPE_VIDEO_OUTPUT ||
945 sel->target != V4L2_SEL_TGT_COMPOSE)
946 return -EINVAL;
947
948 if (vb2_is_busy(&vou_dev->queue))
949 return -EBUSY;
950
951 if (vou_dev->std & V4L2_STD_525_60)
952 img_height_max = 480;
953 else
954 img_height_max = 576;
955
956 v4l_bound_align_image(&rect->width,
957 VOU_MIN_IMAGE_WIDTH, VOU_MAX_IMAGE_WIDTH, 1,
958 &rect->height,
959 VOU_MIN_IMAGE_HEIGHT, img_height_max, 1, 0);
960
961 if (rect->width + rect->left > VOU_MAX_IMAGE_WIDTH)
962 rect->left = VOU_MAX_IMAGE_WIDTH - rect->width;
963
964 if (rect->height + rect->top > img_height_max)
965 rect->top = img_height_max - rect->height;
966
967 geo.output = *rect;
968 geo.in_width = pix->width;
969 geo.in_height = pix->height;
970
971 /* Configure the encoder one-to-one, position at 0, ignore errors */
972 sd_sel.r.width = geo.output.width;
973 sd_sel.r.height = geo.output.height;
974 /*
975 * We first issue a S_SELECTION, so that the subsequent S_FMT delivers the
976 * final encoder configuration.
977 */
978 v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
979 set_selection, NULL, &sd_sel);
980 format.format.width = geo.output.width;
981 format.format.height = geo.output.height;
982 ret = v4l2_device_call_until_err(&vou_dev->v4l2_dev, 0, pad,
983 set_fmt, NULL, &format);
984 /* Must be implemented, so, don't check for -ENOIOCTLCMD */
985 if (ret < 0)
986 return ret;
987
988 /* Sanity checks */
989 if ((unsigned)format.format.width > VOU_MAX_IMAGE_WIDTH ||
990 (unsigned)format.format.height > img_height_max ||
991 format.format.code != MEDIA_BUS_FMT_YUYV8_2X8)
992 return -EIO;
993
994 geo.output.width = format.format.width;
995 geo.output.height = format.format.height;
996
997 /*
998 * No down-scaling. According to the API, current call has precedence:
999 * https://linuxtv.org/downloads/v4l-dvb-apis/uapi/v4l/crop.html#cropping-structures
1000 */
1001 vou_adjust_input(&geo, vou_dev->std);
1002
1003 /* We tried to preserve output rectangle, but it could have changed */
1004 vou_dev->rect = geo.output;
1005 pix->width = geo.in_width;
1006 pix->height = geo.in_height;
1007
1008 sh_vou_configure_geometry(vou_dev, vou_dev->pix_idx,
1009 geo.scale_idx_h, geo.scale_idx_v);
1010
1011 return 0;
1012 }
1013
sh_vou_isr(int irq,void * dev_id)1014 static irqreturn_t sh_vou_isr(int irq, void *dev_id)
1015 {
1016 struct sh_vou_device *vou_dev = dev_id;
1017 static unsigned long j;
1018 struct sh_vou_buffer *vb;
1019 static int cnt;
1020 u32 irq_status = sh_vou_reg_a_read(vou_dev, VOUIR), masked;
1021 u32 vou_status = sh_vou_reg_a_read(vou_dev, VOUSTR);
1022
1023 if (!(irq_status & 0x300)) {
1024 if (printk_timed_ratelimit(&j, 500))
1025 dev_warn(vou_dev->v4l2_dev.dev, "IRQ status 0x%x!\n",
1026 irq_status);
1027 return IRQ_NONE;
1028 }
1029
1030 spin_lock(&vou_dev->lock);
1031 if (!vou_dev->active || list_empty(&vou_dev->buf_list)) {
1032 if (printk_timed_ratelimit(&j, 500))
1033 dev_warn(vou_dev->v4l2_dev.dev,
1034 "IRQ without active buffer: %x!\n", irq_status);
1035 /* Just ack: buf_release will disable further interrupts */
1036 sh_vou_reg_a_set(vou_dev, VOUIR, 0, 0x300);
1037 spin_unlock(&vou_dev->lock);
1038 return IRQ_HANDLED;
1039 }
1040
1041 masked = ~(0x300 & irq_status) & irq_status & 0x30304;
1042 dev_dbg(vou_dev->v4l2_dev.dev,
1043 "IRQ status 0x%x -> 0x%x, VOU status 0x%x, cnt %d\n",
1044 irq_status, masked, vou_status, cnt);
1045
1046 cnt++;
1047 /* side = vou_status & 0x10000; */
1048
1049 /* Clear only set interrupts */
1050 sh_vou_reg_a_write(vou_dev, VOUIR, masked);
1051
1052 vb = vou_dev->active;
1053 if (list_is_singular(&vb->list)) {
1054 /* Keep cycling while no next buffer is available */
1055 sh_vou_schedule_next(vou_dev, &vb->vb);
1056 spin_unlock(&vou_dev->lock);
1057 return IRQ_HANDLED;
1058 }
1059
1060 list_del(&vb->list);
1061
1062 vb->vb.vb2_buf.timestamp = ktime_get_ns();
1063 vb->vb.sequence = vou_dev->sequence++;
1064 vb->vb.field = V4L2_FIELD_INTERLACED;
1065 vb2_buffer_done(&vb->vb.vb2_buf, VB2_BUF_STATE_DONE);
1066
1067 vou_dev->active = list_entry(vou_dev->buf_list.next,
1068 struct sh_vou_buffer, list);
1069
1070 if (list_is_singular(&vou_dev->buf_list)) {
1071 /* Keep cycling while no next buffer is available */
1072 sh_vou_schedule_next(vou_dev, &vou_dev->active->vb);
1073 } else {
1074 struct sh_vou_buffer *new = list_entry(vou_dev->active->list.next,
1075 struct sh_vou_buffer, list);
1076 sh_vou_schedule_next(vou_dev, &new->vb);
1077 }
1078
1079 spin_unlock(&vou_dev->lock);
1080
1081 return IRQ_HANDLED;
1082 }
1083
sh_vou_hw_init(struct sh_vou_device * vou_dev)1084 static int sh_vou_hw_init(struct sh_vou_device *vou_dev)
1085 {
1086 struct sh_vou_pdata *pdata = vou_dev->pdata;
1087 u32 voucr = sh_vou_ntsc_mode(pdata->bus_fmt) << 29;
1088 int i = 100;
1089
1090 /* Disable all IRQs */
1091 sh_vou_reg_a_write(vou_dev, VOUIR, 0);
1092
1093 /* Reset VOU interfaces - registers unaffected */
1094 sh_vou_reg_a_write(vou_dev, VOUSRR, 0x101);
1095 while (--i && (sh_vou_reg_a_read(vou_dev, VOUSRR) & 0x101))
1096 udelay(1);
1097
1098 if (!i)
1099 return -ETIMEDOUT;
1100
1101 dev_dbg(vou_dev->v4l2_dev.dev, "Reset took %dus\n", 100 - i);
1102
1103 if (pdata->flags & SH_VOU_PCLK_FALLING)
1104 voucr |= 1 << 28;
1105 if (pdata->flags & SH_VOU_HSYNC_LOW)
1106 voucr |= 1 << 27;
1107 if (pdata->flags & SH_VOU_VSYNC_LOW)
1108 voucr |= 1 << 26;
1109 sh_vou_reg_ab_set(vou_dev, VOUCR, voucr, 0xfc000000);
1110
1111 /* Manual register side switching at first */
1112 sh_vou_reg_a_write(vou_dev, VOURCR, 4);
1113 /* Default - fixed HSYNC length, can be made configurable is required */
1114 sh_vou_reg_ab_write(vou_dev, VOUMSR, 0x800000);
1115
1116 sh_vou_set_fmt_vid_out(vou_dev, &vou_dev->pix);
1117
1118 return 0;
1119 }
1120
1121 /* File operations */
sh_vou_open(struct file * file)1122 static int sh_vou_open(struct file *file)
1123 {
1124 struct sh_vou_device *vou_dev = video_drvdata(file);
1125 int err;
1126
1127 if (mutex_lock_interruptible(&vou_dev->fop_lock))
1128 return -ERESTARTSYS;
1129
1130 err = v4l2_fh_open(file);
1131 if (err)
1132 goto done_open;
1133 if (v4l2_fh_is_singular_file(file) &&
1134 vou_dev->status == SH_VOU_INITIALISING) {
1135 /* First open */
1136 err = pm_runtime_resume_and_get(vou_dev->v4l2_dev.dev);
1137 if (err < 0) {
1138 v4l2_fh_release(file);
1139 goto done_open;
1140 }
1141 err = sh_vou_hw_init(vou_dev);
1142 if (err < 0) {
1143 pm_runtime_put(vou_dev->v4l2_dev.dev);
1144 v4l2_fh_release(file);
1145 } else {
1146 vou_dev->status = SH_VOU_IDLE;
1147 }
1148 }
1149 done_open:
1150 mutex_unlock(&vou_dev->fop_lock);
1151 return err;
1152 }
1153
sh_vou_release(struct file * file)1154 static int sh_vou_release(struct file *file)
1155 {
1156 struct sh_vou_device *vou_dev = video_drvdata(file);
1157 bool is_last;
1158
1159 mutex_lock(&vou_dev->fop_lock);
1160 is_last = v4l2_fh_is_singular_file(file);
1161 _vb2_fop_release(file, NULL);
1162 if (is_last) {
1163 /* Last close */
1164 vou_dev->status = SH_VOU_INITIALISING;
1165 sh_vou_reg_a_set(vou_dev, VOUER, 0, 0x101);
1166 pm_runtime_put(vou_dev->v4l2_dev.dev);
1167 }
1168 mutex_unlock(&vou_dev->fop_lock);
1169 return 0;
1170 }
1171
1172 /* sh_vou display ioctl operations */
1173 static const struct v4l2_ioctl_ops sh_vou_ioctl_ops = {
1174 .vidioc_querycap = sh_vou_querycap,
1175 .vidioc_enum_fmt_vid_out = sh_vou_enum_fmt_vid_out,
1176 .vidioc_g_fmt_vid_out = sh_vou_g_fmt_vid_out,
1177 .vidioc_s_fmt_vid_out = sh_vou_s_fmt_vid_out,
1178 .vidioc_try_fmt_vid_out = sh_vou_try_fmt_vid_out,
1179 .vidioc_reqbufs = vb2_ioctl_reqbufs,
1180 .vidioc_create_bufs = vb2_ioctl_create_bufs,
1181 .vidioc_querybuf = vb2_ioctl_querybuf,
1182 .vidioc_qbuf = vb2_ioctl_qbuf,
1183 .vidioc_dqbuf = vb2_ioctl_dqbuf,
1184 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
1185 .vidioc_streamon = vb2_ioctl_streamon,
1186 .vidioc_streamoff = vb2_ioctl_streamoff,
1187 .vidioc_expbuf = vb2_ioctl_expbuf,
1188 .vidioc_g_output = sh_vou_g_output,
1189 .vidioc_s_output = sh_vou_s_output,
1190 .vidioc_enum_output = sh_vou_enum_output,
1191 .vidioc_s_std = sh_vou_s_std,
1192 .vidioc_g_std = sh_vou_g_std,
1193 .vidioc_g_selection = sh_vou_g_selection,
1194 .vidioc_s_selection = sh_vou_s_selection,
1195 .vidioc_log_status = sh_vou_log_status,
1196 };
1197
1198 static const struct v4l2_file_operations sh_vou_fops = {
1199 .owner = THIS_MODULE,
1200 .open = sh_vou_open,
1201 .release = sh_vou_release,
1202 .unlocked_ioctl = video_ioctl2,
1203 .mmap = vb2_fop_mmap,
1204 .poll = vb2_fop_poll,
1205 .write = vb2_fop_write,
1206 };
1207
1208 static const struct video_device sh_vou_video_template = {
1209 .name = "sh_vou",
1210 .fops = &sh_vou_fops,
1211 .ioctl_ops = &sh_vou_ioctl_ops,
1212 .tvnorms = V4L2_STD_525_60, /* PAL only supported in 8-bit non-bt656 mode */
1213 .vfl_dir = VFL_DIR_TX,
1214 .device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE |
1215 V4L2_CAP_STREAMING,
1216 };
1217
sh_vou_probe(struct platform_device * pdev)1218 static int sh_vou_probe(struct platform_device *pdev)
1219 {
1220 struct sh_vou_pdata *vou_pdata = pdev->dev.platform_data;
1221 struct v4l2_rect *rect;
1222 struct v4l2_pix_format *pix;
1223 struct i2c_adapter *i2c_adap;
1224 struct video_device *vdev;
1225 struct sh_vou_device *vou_dev;
1226 struct v4l2_subdev *subdev;
1227 struct vb2_queue *q;
1228 int irq, ret;
1229
1230 if (!vou_pdata) {
1231 dev_err(&pdev->dev, "Insufficient VOU platform information.\n");
1232 return -ENODEV;
1233 }
1234
1235 irq = platform_get_irq(pdev, 0);
1236 if (irq < 0)
1237 return irq;
1238
1239 vou_dev = devm_kzalloc(&pdev->dev, sizeof(*vou_dev), GFP_KERNEL);
1240 if (!vou_dev)
1241 return -ENOMEM;
1242
1243 INIT_LIST_HEAD(&vou_dev->buf_list);
1244 spin_lock_init(&vou_dev->lock);
1245 mutex_init(&vou_dev->fop_lock);
1246 vou_dev->pdata = vou_pdata;
1247 vou_dev->status = SH_VOU_INITIALISING;
1248 vou_dev->pix_idx = 1;
1249
1250 rect = &vou_dev->rect;
1251 pix = &vou_dev->pix;
1252
1253 /* Fill in defaults */
1254 vou_dev->std = V4L2_STD_NTSC_M;
1255 rect->left = 0;
1256 rect->top = 0;
1257 rect->width = VOU_MAX_IMAGE_WIDTH;
1258 rect->height = 480;
1259 pix->width = VOU_MAX_IMAGE_WIDTH;
1260 pix->height = 480;
1261 pix->pixelformat = V4L2_PIX_FMT_NV16;
1262 pix->field = V4L2_FIELD_INTERLACED;
1263 pix->bytesperline = VOU_MAX_IMAGE_WIDTH;
1264 pix->sizeimage = VOU_MAX_IMAGE_WIDTH * 2 * 480;
1265 pix->colorspace = V4L2_COLORSPACE_SMPTE170M;
1266
1267 vou_dev->base = devm_platform_ioremap_resource(pdev, 0);
1268 if (IS_ERR(vou_dev->base))
1269 return PTR_ERR(vou_dev->base);
1270
1271 ret = devm_request_irq(&pdev->dev, irq, sh_vou_isr, 0, "vou", vou_dev);
1272 if (ret < 0)
1273 return ret;
1274
1275 ret = v4l2_device_register(&pdev->dev, &vou_dev->v4l2_dev);
1276 if (ret < 0) {
1277 dev_err(&pdev->dev, "Error registering v4l2 device\n");
1278 return ret;
1279 }
1280
1281 vdev = &vou_dev->vdev;
1282 *vdev = sh_vou_video_template;
1283 if (vou_pdata->bus_fmt == SH_VOU_BUS_8BIT)
1284 vdev->tvnorms |= V4L2_STD_PAL;
1285 vdev->v4l2_dev = &vou_dev->v4l2_dev;
1286 vdev->release = video_device_release_empty;
1287 vdev->lock = &vou_dev->fop_lock;
1288
1289 video_set_drvdata(vdev, vou_dev);
1290
1291 /* Initialize the vb2 queue */
1292 q = &vou_dev->queue;
1293 q->type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
1294 q->io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
1295 q->drv_priv = vou_dev;
1296 q->buf_struct_size = sizeof(struct sh_vou_buffer);
1297 q->ops = &sh_vou_qops;
1298 q->mem_ops = &vb2_dma_contig_memops;
1299 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
1300 q->min_queued_buffers = 2;
1301 q->lock = &vou_dev->fop_lock;
1302 q->dev = &pdev->dev;
1303 ret = vb2_queue_init(q);
1304 if (ret)
1305 goto ei2cgadap;
1306
1307 vdev->queue = q;
1308 INIT_LIST_HEAD(&vou_dev->buf_list);
1309
1310 pm_runtime_enable(&pdev->dev);
1311 pm_runtime_resume(&pdev->dev);
1312
1313 i2c_adap = i2c_get_adapter(vou_pdata->i2c_adap);
1314 if (!i2c_adap) {
1315 ret = -ENODEV;
1316 goto ei2cgadap;
1317 }
1318
1319 ret = sh_vou_hw_init(vou_dev);
1320 if (ret < 0)
1321 goto ereset;
1322
1323 subdev = v4l2_i2c_new_subdev_board(&vou_dev->v4l2_dev, i2c_adap,
1324 vou_pdata->board_info, NULL);
1325 if (!subdev) {
1326 ret = -ENOMEM;
1327 goto ei2cnd;
1328 }
1329
1330 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
1331 if (ret < 0)
1332 goto evregdev;
1333
1334 return 0;
1335
1336 evregdev:
1337 ei2cnd:
1338 ereset:
1339 i2c_put_adapter(i2c_adap);
1340 ei2cgadap:
1341 pm_runtime_disable(&pdev->dev);
1342 v4l2_device_unregister(&vou_dev->v4l2_dev);
1343 return ret;
1344 }
1345
sh_vou_remove(struct platform_device * pdev)1346 static void sh_vou_remove(struct platform_device *pdev)
1347 {
1348 struct v4l2_device *v4l2_dev = platform_get_drvdata(pdev);
1349 struct sh_vou_device *vou_dev = container_of(v4l2_dev,
1350 struct sh_vou_device, v4l2_dev);
1351 struct v4l2_subdev *sd = list_entry(v4l2_dev->subdevs.next,
1352 struct v4l2_subdev, list);
1353 struct i2c_client *client = v4l2_get_subdevdata(sd);
1354
1355 pm_runtime_disable(&pdev->dev);
1356 video_unregister_device(&vou_dev->vdev);
1357 i2c_put_adapter(client->adapter);
1358 v4l2_device_unregister(&vou_dev->v4l2_dev);
1359 }
1360
1361 static struct platform_driver sh_vou = {
1362 .remove_new = sh_vou_remove,
1363 .driver = {
1364 .name = "sh-vou",
1365 },
1366 };
1367
1368 module_platform_driver_probe(sh_vou, sh_vou_probe);
1369
1370 MODULE_DESCRIPTION("SuperH VOU driver");
1371 MODULE_AUTHOR("Guennadi Liakhovetski <g.liakhovetski@gmx.de>");
1372 MODULE_LICENSE("GPL v2");
1373 MODULE_VERSION("0.1.0");
1374 MODULE_ALIAS("platform:sh-vou");
1375