1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2021-2023 Digiteq Automotive
4 * author: Martin Tuma <[email protected]>
5 *
6 * This is the v4l2 output device module. It initializes the signal serializers
7 * and creates the v4l2 video devices.
8 *
9 * When the device is in loopback mode (a direct, in HW, in->out frame passing
10 * mode) we disable the v4l2 output by returning EBUSY in the open() syscall.
11 */
12
13 #include <linux/pci.h>
14 #include <linux/align.h>
15 #include <linux/dma/amd_xdma.h>
16 #include <media/v4l2-ioctl.h>
17 #include <media/videobuf2-v4l2.h>
18 #include <media/videobuf2-dma-sg.h>
19 #include <media/v4l2-dv-timings.h>
20 #include "mgb4_core.h"
21 #include "mgb4_dma.h"
22 #include "mgb4_sysfs.h"
23 #include "mgb4_io.h"
24 #include "mgb4_cmt.h"
25 #include "mgb4_vout.h"
26
27 ATTRIBUTE_GROUPS(mgb4_fpdl3_out);
28 ATTRIBUTE_GROUPS(mgb4_gmsl_out);
29
30 static const struct mgb4_vout_config vout_cfg[] = {
31 {0, 0, 8, {0x78, 0x60, 0x64, 0x68, 0x74, 0x6C, 0x70, 0x7C, 0xE0}},
32 {1, 1, 9, {0x98, 0x80, 0x84, 0x88, 0x94, 0x8C, 0x90, 0x9C, 0xE4}}
33 };
34
35 static const struct i2c_board_info fpdl3_ser_info[] = {
36 {I2C_BOARD_INFO("serializer1", 0x14)},
37 {I2C_BOARD_INFO("serializer2", 0x16)},
38 };
39
40 static const struct mgb4_i2c_kv fpdl3_i2c[] = {
41 {0x05, 0xFF, 0x04}, {0x06, 0xFF, 0x01}, {0xC2, 0xFF, 0x80}
42 };
43
44 static const struct v4l2_dv_timings_cap video_timings_cap = {
45 .type = V4L2_DV_BT_656_1120,
46 .bt = {
47 .min_width = 320,
48 .max_width = 4096,
49 .min_height = 240,
50 .max_height = 2160,
51 .min_pixelclock = 1843200, /* 320 x 240 x 24Hz */
52 .max_pixelclock = 530841600, /* 4096 x 2160 x 60Hz */
53 .standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
54 V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
55 .capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
56 V4L2_DV_BT_CAP_CUSTOM,
57 },
58 };
59
get_timings(struct mgb4_vout_dev * voutdev,struct v4l2_dv_timings * timings)60 static void get_timings(struct mgb4_vout_dev *voutdev,
61 struct v4l2_dv_timings *timings)
62 {
63 struct mgb4_regs *video = &voutdev->mgbdev->video;
64 const struct mgb4_vout_regs *regs = &voutdev->config->regs;
65
66 u32 hsync = mgb4_read_reg(video, regs->hsync);
67 u32 vsync = mgb4_read_reg(video, regs->vsync);
68 u32 resolution = mgb4_read_reg(video, regs->resolution);
69
70 memset(timings, 0, sizeof(*timings));
71 timings->type = V4L2_DV_BT_656_1120;
72 timings->bt.width = resolution >> 16;
73 timings->bt.height = resolution & 0xFFFF;
74 if (hsync & (1U << 31))
75 timings->bt.polarities |= V4L2_DV_HSYNC_POS_POL;
76 if (vsync & (1U << 31))
77 timings->bt.polarities |= V4L2_DV_VSYNC_POS_POL;
78 timings->bt.pixelclock = voutdev->freq * 1000;
79 timings->bt.hsync = (hsync & 0x00FF0000) >> 16;
80 timings->bt.vsync = (vsync & 0x00FF0000) >> 16;
81 timings->bt.hbackporch = (hsync & 0x0000FF00) >> 8;
82 timings->bt.hfrontporch = hsync & 0x000000FF;
83 timings->bt.vbackporch = (vsync & 0x0000FF00) >> 8;
84 timings->bt.vfrontporch = vsync & 0x000000FF;
85 }
86
return_all_buffers(struct mgb4_vout_dev * voutdev,enum vb2_buffer_state state)87 static void return_all_buffers(struct mgb4_vout_dev *voutdev,
88 enum vb2_buffer_state state)
89 {
90 struct mgb4_frame_buffer *buf, *node;
91 unsigned long flags;
92
93 spin_lock_irqsave(&voutdev->qlock, flags);
94 list_for_each_entry_safe(buf, node, &voutdev->buf_list, list) {
95 vb2_buffer_done(&buf->vb.vb2_buf, state);
96 list_del(&buf->list);
97 }
98 spin_unlock_irqrestore(&voutdev->qlock, flags);
99 }
100
queue_setup(struct vb2_queue * q,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])101 static int queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
102 unsigned int *nplanes, unsigned int sizes[],
103 struct device *alloc_devs[])
104 {
105 struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(q);
106 struct mgb4_regs *video = &voutdev->mgbdev->video;
107 u32 config = mgb4_read_reg(video, voutdev->config->regs.config);
108 u32 pixelsize = (config & (1U << 16)) ? 2 : 4;
109 unsigned int size = (voutdev->width + voutdev->padding) * voutdev->height
110 * pixelsize;
111
112 /*
113 * If I/O reconfiguration is in process, do not allow to start
114 * the queue. See video_source_store() in mgb4_sysfs_out.c for
115 * details.
116 */
117 if (test_bit(0, &voutdev->mgbdev->io_reconfig))
118 return -EBUSY;
119
120 if (*nplanes)
121 return sizes[0] < size ? -EINVAL : 0;
122 *nplanes = 1;
123 sizes[0] = size;
124
125 return 0;
126 }
127
buffer_init(struct vb2_buffer * vb)128 static int buffer_init(struct vb2_buffer *vb)
129 {
130 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
131 struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
132
133 INIT_LIST_HEAD(&buf->list);
134
135 return 0;
136 }
137
buffer_prepare(struct vb2_buffer * vb)138 static int buffer_prepare(struct vb2_buffer *vb)
139 {
140 struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vb->vb2_queue);
141 struct device *dev = &voutdev->mgbdev->pdev->dev;
142 struct mgb4_regs *video = &voutdev->mgbdev->video;
143 u32 config = mgb4_read_reg(video, voutdev->config->regs.config);
144 u32 pixelsize = (config & (1U << 16)) ? 2 : 4;
145 unsigned int size = (voutdev->width + voutdev->padding) * voutdev->height
146 * pixelsize;
147
148 if (vb2_plane_size(vb, 0) < size) {
149 dev_err(dev, "buffer too small (%lu < %u)\n",
150 vb2_plane_size(vb, 0), size);
151 return -EINVAL;
152 }
153
154 vb2_set_plane_payload(vb, 0, size);
155
156 return 0;
157 }
158
buffer_queue(struct vb2_buffer * vb)159 static void buffer_queue(struct vb2_buffer *vb)
160 {
161 struct mgb4_vout_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
162 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
163 struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
164 unsigned long flags;
165
166 spin_lock_irqsave(&vindev->qlock, flags);
167 list_add_tail(&buf->list, &vindev->buf_list);
168 spin_unlock_irqrestore(&vindev->qlock, flags);
169 }
170
stop_streaming(struct vb2_queue * vq)171 static void stop_streaming(struct vb2_queue *vq)
172 {
173 struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vq);
174 struct mgb4_dev *mgbdev = voutdev->mgbdev;
175 int irq = xdma_get_user_irq(mgbdev->xdev, voutdev->config->irq);
176
177 xdma_disable_user_irq(mgbdev->xdev, irq);
178 cancel_work_sync(&voutdev->dma_work);
179
180 mgb4_mask_reg(&mgbdev->video, voutdev->config->regs.config, 0x2, 0x0);
181 mgb4_write_reg(&mgbdev->video, voutdev->config->regs.padding, 0);
182
183 return_all_buffers(voutdev, VB2_BUF_STATE_ERROR);
184 }
185
start_streaming(struct vb2_queue * vq,unsigned int count)186 static int start_streaming(struct vb2_queue *vq, unsigned int count)
187 {
188 struct mgb4_vout_dev *voutdev = vb2_get_drv_priv(vq);
189 struct mgb4_dev *mgbdev = voutdev->mgbdev;
190 struct device *dev = &mgbdev->pdev->dev;
191 struct mgb4_frame_buffer *buf;
192 struct mgb4_regs *video = &mgbdev->video;
193 const struct mgb4_vout_config *config = voutdev->config;
194 int irq = xdma_get_user_irq(mgbdev->xdev, config->irq);
195 int rv;
196 u32 addr;
197
198 mgb4_write_reg(video, config->regs.padding, voutdev->padding);
199 mgb4_mask_reg(video, config->regs.config, 0x2, 0x2);
200
201 addr = mgb4_read_reg(video, config->regs.address);
202 if (addr >= MGB4_ERR_QUEUE_FULL) {
203 dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
204 return_all_buffers(voutdev, VB2_BUF_STATE_QUEUED);
205 return -EBUSY;
206 }
207
208 buf = list_first_entry(&voutdev->buf_list, struct mgb4_frame_buffer,
209 list);
210 list_del_init(voutdev->buf_list.next);
211
212 rv = mgb4_dma_transfer(mgbdev, config->dma_channel, true, addr,
213 vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
214 if (rv < 0) {
215 dev_warn(dev, "DMA transfer error\n");
216 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
217 } else {
218 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
219 }
220
221 xdma_enable_user_irq(mgbdev->xdev, irq);
222
223 return 0;
224 }
225
226 static const struct vb2_ops queue_ops = {
227 .queue_setup = queue_setup,
228 .buf_init = buffer_init,
229 .buf_prepare = buffer_prepare,
230 .buf_queue = buffer_queue,
231 .start_streaming = start_streaming,
232 .stop_streaming = stop_streaming,
233 };
234
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)235 static int vidioc_querycap(struct file *file, void *priv,
236 struct v4l2_capability *cap)
237 {
238 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
239 strscpy(cap->card, "MGB4 PCIe Card", sizeof(cap->card));
240
241 return 0;
242 }
243
vidioc_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)244 static int vidioc_enum_fmt(struct file *file, void *priv,
245 struct v4l2_fmtdesc *f)
246 {
247 struct mgb4_vin_dev *voutdev = video_drvdata(file);
248 struct mgb4_regs *video = &voutdev->mgbdev->video;
249
250 if (f->index == 0) {
251 f->pixelformat = V4L2_PIX_FMT_ABGR32;
252 return 0;
253 } else if (f->index == 1 && has_yuv(video)) {
254 f->pixelformat = V4L2_PIX_FMT_YUYV;
255 return 0;
256 } else {
257 return -EINVAL;
258 }
259 }
260
vidioc_g_fmt(struct file * file,void * priv,struct v4l2_format * f)261 static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
262 {
263 struct mgb4_vout_dev *voutdev = video_drvdata(file);
264 struct mgb4_regs *video = &voutdev->mgbdev->video;
265 u32 config = mgb4_read_reg(video, voutdev->config->regs.config);
266
267 f->fmt.pix.width = voutdev->width;
268 f->fmt.pix.height = voutdev->height;
269 f->fmt.pix.field = V4L2_FIELD_NONE;
270
271 if (config & (1U << 16)) {
272 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
273 if (config & (1U << 20)) {
274 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
275 } else {
276 if (config & (1U << 19))
277 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
278 else
279 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
280 }
281 f->fmt.pix.bytesperline = (f->fmt.pix.width + voutdev->padding) * 2;
282 } else {
283 f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
284 f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
285 f->fmt.pix.bytesperline = (f->fmt.pix.width + voutdev->padding) * 4;
286 }
287
288 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
289
290 return 0;
291 }
292
vidioc_try_fmt(struct file * file,void * priv,struct v4l2_format * f)293 static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
294 {
295 struct mgb4_vout_dev *voutdev = video_drvdata(file);
296 struct mgb4_regs *video = &voutdev->mgbdev->video;
297 u32 pixelsize;
298
299 f->fmt.pix.width = voutdev->width;
300 f->fmt.pix.height = voutdev->height;
301 f->fmt.pix.field = V4L2_FIELD_NONE;
302
303 if (has_yuv(video) && f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV) {
304 pixelsize = 2;
305 if (!(f->fmt.pix.colorspace == V4L2_COLORSPACE_REC709 ||
306 f->fmt.pix.colorspace == V4L2_COLORSPACE_SMPTE170M))
307 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
308 } else {
309 pixelsize = 4;
310 f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
311 f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
312 }
313
314 if (f->fmt.pix.bytesperline > f->fmt.pix.width * pixelsize &&
315 f->fmt.pix.bytesperline < f->fmt.pix.width * pixelsize * 2)
316 f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.bytesperline,
317 pixelsize);
318 else
319 f->fmt.pix.bytesperline = f->fmt.pix.width * pixelsize;
320 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
321
322 return 0;
323 }
324
vidioc_s_fmt(struct file * file,void * priv,struct v4l2_format * f)325 static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
326 {
327 struct mgb4_vout_dev *voutdev = video_drvdata(file);
328 struct mgb4_regs *video = &voutdev->mgbdev->video;
329 u32 config, pixelsize;
330 int ret;
331
332 if (vb2_is_busy(&voutdev->queue))
333 return -EBUSY;
334
335 ret = vidioc_try_fmt(file, priv, f);
336 if (ret < 0)
337 return ret;
338
339 config = mgb4_read_reg(video, voutdev->config->regs.config);
340 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV) {
341 pixelsize = 2;
342 config |= 1U << 16;
343
344 if (f->fmt.pix.colorspace == V4L2_COLORSPACE_REC709) {
345 config |= 1U << 20;
346 config |= 1U << 19;
347 } else if (f->fmt.pix.colorspace == V4L2_COLORSPACE_SMPTE170M) {
348 config &= ~(1U << 20);
349 config |= 1U << 19;
350 } else {
351 config &= ~(1U << 20);
352 config &= ~(1U << 19);
353 }
354 } else {
355 pixelsize = 4;
356 config &= ~(1U << 16);
357 }
358 mgb4_write_reg(video, voutdev->config->regs.config, config);
359
360 voutdev->padding = (f->fmt.pix.bytesperline - (f->fmt.pix.width
361 * pixelsize)) / pixelsize;
362
363 return 0;
364 }
365
vidioc_g_output(struct file * file,void * priv,unsigned int * i)366 static int vidioc_g_output(struct file *file, void *priv, unsigned int *i)
367 {
368 *i = 0;
369 return 0;
370 }
371
vidioc_s_output(struct file * file,void * priv,unsigned int i)372 static int vidioc_s_output(struct file *file, void *priv, unsigned int i)
373 {
374 return i ? -EINVAL : 0;
375 }
376
vidioc_enum_output(struct file * file,void * priv,struct v4l2_output * out)377 static int vidioc_enum_output(struct file *file, void *priv,
378 struct v4l2_output *out)
379 {
380 if (out->index != 0)
381 return -EINVAL;
382
383 out->type = V4L2_OUTPUT_TYPE_ANALOG;
384 out->capabilities = V4L2_OUT_CAP_DV_TIMINGS;
385 strscpy(out->name, "MGB4", sizeof(out->name));
386
387 return 0;
388 }
389
vidioc_enum_frameintervals(struct file * file,void * priv,struct v4l2_frmivalenum * ival)390 static int vidioc_enum_frameintervals(struct file *file, void *priv,
391 struct v4l2_frmivalenum *ival)
392 {
393 struct mgb4_vout_dev *voutdev = video_drvdata(file);
394 struct mgb4_regs *video = &voutdev->mgbdev->video;
395 struct v4l2_dv_timings timings;
396
397 if (ival->index != 0)
398 return -EINVAL;
399 if (!(ival->pixel_format == V4L2_PIX_FMT_ABGR32 ||
400 ((has_yuv(video) && ival->pixel_format == V4L2_PIX_FMT_YUYV))))
401 return -EINVAL;
402 if (ival->width != voutdev->width || ival->height != voutdev->height)
403 return -EINVAL;
404
405 get_timings(voutdev, &timings);
406
407 ival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
408 ival->stepwise.max.denominator = MGB4_HW_FREQ;
409 ival->stepwise.max.numerator = 0xFFFFFFFF;
410 ival->stepwise.min.denominator = timings.bt.pixelclock;
411 ival->stepwise.min.numerator = pixel_size(&timings);
412 ival->stepwise.step.denominator = MGB4_HW_FREQ;
413 ival->stepwise.step.numerator = 1;
414
415 return 0;
416 }
417
vidioc_g_parm(struct file * file,void * priv,struct v4l2_streamparm * parm)418 static int vidioc_g_parm(struct file *file, void *priv,
419 struct v4l2_streamparm *parm)
420 {
421 struct mgb4_vout_dev *voutdev = video_drvdata(file);
422 struct mgb4_regs *video = &voutdev->mgbdev->video;
423 struct v4l2_fract *tpf = &parm->parm.output.timeperframe;
424 struct v4l2_dv_timings timings;
425 u32 timer;
426
427 parm->parm.output.writebuffers = 2;
428
429 if (has_timeperframe(video)) {
430 timer = mgb4_read_reg(video, voutdev->config->regs.timer);
431 if (timer < 0xFFFF) {
432 get_timings(voutdev, &timings);
433 tpf->numerator = pixel_size(&timings);
434 tpf->denominator = timings.bt.pixelclock;
435 } else {
436 tpf->numerator = timer;
437 tpf->denominator = MGB4_HW_FREQ;
438 }
439
440 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
441 }
442
443 return 0;
444 }
445
vidioc_s_parm(struct file * file,void * priv,struct v4l2_streamparm * parm)446 static int vidioc_s_parm(struct file *file, void *priv,
447 struct v4l2_streamparm *parm)
448 {
449 struct mgb4_vout_dev *voutdev = video_drvdata(file);
450 struct mgb4_regs *video = &voutdev->mgbdev->video;
451 struct v4l2_fract *tpf = &parm->parm.output.timeperframe;
452 struct v4l2_dv_timings timings;
453 u32 timer, period;
454
455 if (has_timeperframe(video)) {
456 timer = tpf->denominator ?
457 MGB4_PERIOD(tpf->numerator, tpf->denominator) : 0;
458 if (timer) {
459 get_timings(voutdev, &timings);
460 period = MGB4_PERIOD(pixel_size(&timings),
461 timings.bt.pixelclock);
462 if (timer < period)
463 timer = 0;
464 }
465
466 mgb4_write_reg(video, voutdev->config->regs.timer, timer);
467 }
468
469 return vidioc_g_parm(file, priv, parm);
470 }
471
vidioc_g_dv_timings(struct file * file,void * fh,struct v4l2_dv_timings * timings)472 static int vidioc_g_dv_timings(struct file *file, void *fh,
473 struct v4l2_dv_timings *timings)
474 {
475 struct mgb4_vout_dev *voutdev = video_drvdata(file);
476
477 get_timings(voutdev, timings);
478
479 return 0;
480 }
481
vidioc_s_dv_timings(struct file * file,void * fh,struct v4l2_dv_timings * timings)482 static int vidioc_s_dv_timings(struct file *file, void *fh,
483 struct v4l2_dv_timings *timings)
484 {
485 struct mgb4_vout_dev *voutdev = video_drvdata(file);
486
487 get_timings(voutdev, timings);
488
489 return 0;
490 }
491
vidioc_enum_dv_timings(struct file * file,void * fh,struct v4l2_enum_dv_timings * timings)492 static int vidioc_enum_dv_timings(struct file *file, void *fh,
493 struct v4l2_enum_dv_timings *timings)
494 {
495 return v4l2_enum_dv_timings_cap(timings, &video_timings_cap, NULL, NULL);
496 }
497
vidioc_dv_timings_cap(struct file * file,void * fh,struct v4l2_dv_timings_cap * cap)498 static int vidioc_dv_timings_cap(struct file *file, void *fh,
499 struct v4l2_dv_timings_cap *cap)
500 {
501 *cap = video_timings_cap;
502
503 return 0;
504 }
505
506 static const struct v4l2_ioctl_ops video_ioctl_ops = {
507 .vidioc_querycap = vidioc_querycap,
508 .vidioc_enum_fmt_vid_out = vidioc_enum_fmt,
509 .vidioc_try_fmt_vid_out = vidioc_try_fmt,
510 .vidioc_s_fmt_vid_out = vidioc_s_fmt,
511 .vidioc_g_fmt_vid_out = vidioc_g_fmt,
512 .vidioc_enum_output = vidioc_enum_output,
513 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
514 .vidioc_g_output = vidioc_g_output,
515 .vidioc_s_output = vidioc_s_output,
516 .vidioc_g_parm = vidioc_g_parm,
517 .vidioc_s_parm = vidioc_s_parm,
518 .vidioc_dv_timings_cap = vidioc_dv_timings_cap,
519 .vidioc_enum_dv_timings = vidioc_enum_dv_timings,
520 .vidioc_g_dv_timings = vidioc_g_dv_timings,
521 .vidioc_s_dv_timings = vidioc_s_dv_timings,
522 .vidioc_reqbufs = vb2_ioctl_reqbufs,
523 .vidioc_create_bufs = vb2_ioctl_create_bufs,
524 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
525 .vidioc_querybuf = vb2_ioctl_querybuf,
526 .vidioc_qbuf = vb2_ioctl_qbuf,
527 .vidioc_dqbuf = vb2_ioctl_dqbuf,
528 .vidioc_expbuf = vb2_ioctl_expbuf,
529 .vidioc_streamon = vb2_ioctl_streamon,
530 .vidioc_streamoff = vb2_ioctl_streamoff,
531 };
532
fh_open(struct file * file)533 static int fh_open(struct file *file)
534 {
535 struct mgb4_vout_dev *voutdev = video_drvdata(file);
536 struct mgb4_regs *video = &voutdev->mgbdev->video;
537 struct device *dev = &voutdev->mgbdev->pdev->dev;
538 u32 config, resolution;
539 int rv;
540
541 /* Return EBUSY when the device is in loopback mode */
542 config = mgb4_read_reg(video, voutdev->config->regs.config);
543 if ((config & 0xc) >> 2 != voutdev->config->id + MGB4_VIN_DEVICES) {
544 dev_dbg(dev, "can not open - device in loopback mode");
545 return -EBUSY;
546 }
547
548 mutex_lock(&voutdev->lock);
549
550 rv = v4l2_fh_open(file);
551 if (rv)
552 goto out;
553
554 if (!v4l2_fh_is_singular_file(file))
555 goto out;
556
557 resolution = mgb4_read_reg(video, voutdev->config->regs.resolution);
558 voutdev->width = resolution >> 16;
559 voutdev->height = resolution & 0xFFFF;
560
561 out:
562 mutex_unlock(&voutdev->lock);
563 return rv;
564 }
565
566 static const struct v4l2_file_operations video_fops = {
567 .owner = THIS_MODULE,
568 .open = fh_open,
569 .release = vb2_fop_release,
570 .unlocked_ioctl = video_ioctl2,
571 .write = vb2_fop_write,
572 .mmap = vb2_fop_mmap,
573 .poll = vb2_fop_poll,
574 };
575
dma_transfer(struct work_struct * work)576 static void dma_transfer(struct work_struct *work)
577 {
578 struct mgb4_vout_dev *voutdev = container_of(work, struct mgb4_vout_dev,
579 dma_work);
580 struct device *dev = &voutdev->mgbdev->pdev->dev;
581 struct mgb4_regs *video = &voutdev->mgbdev->video;
582 struct mgb4_frame_buffer *buf = NULL;
583 unsigned long flags;
584 u32 addr;
585 int rv;
586
587 spin_lock_irqsave(&voutdev->qlock, flags);
588 if (!list_empty(&voutdev->buf_list)) {
589 buf = list_first_entry(&voutdev->buf_list,
590 struct mgb4_frame_buffer, list);
591 list_del_init(voutdev->buf_list.next);
592 }
593 spin_unlock_irqrestore(&voutdev->qlock, flags);
594
595 if (!buf)
596 return;
597
598 addr = mgb4_read_reg(video, voutdev->config->regs.address);
599 if (addr >= MGB4_ERR_QUEUE_FULL) {
600 dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
601 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
602 return;
603 }
604
605 rv = mgb4_dma_transfer(voutdev->mgbdev, voutdev->config->dma_channel,
606 true, addr,
607 vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
608 if (rv < 0) {
609 dev_warn(dev, "DMA transfer error\n");
610 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
611 } else {
612 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
613 }
614 }
615
handler(int irq,void * ctx)616 static irqreturn_t handler(int irq, void *ctx)
617 {
618 struct mgb4_vout_dev *voutdev = (struct mgb4_vout_dev *)ctx;
619 struct mgb4_regs *video = &voutdev->mgbdev->video;
620
621 schedule_work(&voutdev->dma_work);
622
623 mgb4_write_reg(video, 0xB4, 1U << voutdev->config->irq);
624
625 return IRQ_HANDLED;
626 }
627
ser_init(struct mgb4_vout_dev * voutdev,int id)628 static int ser_init(struct mgb4_vout_dev *voutdev, int id)
629 {
630 int rv;
631 const struct i2c_board_info *info = &fpdl3_ser_info[id];
632 struct mgb4_i2c_client *ser = &voutdev->ser;
633 struct device *dev = &voutdev->mgbdev->pdev->dev;
634
635 if (MGB4_IS_GMSL(voutdev->mgbdev))
636 return 0;
637
638 rv = mgb4_i2c_init(ser, voutdev->mgbdev->i2c_adap, info, 8);
639 if (rv < 0) {
640 dev_err(dev, "failed to create serializer\n");
641 return rv;
642 }
643 rv = mgb4_i2c_configure(ser, fpdl3_i2c, ARRAY_SIZE(fpdl3_i2c));
644 if (rv < 0) {
645 dev_err(dev, "failed to configure serializer\n");
646 goto err_i2c_dev;
647 }
648
649 return 0;
650
651 err_i2c_dev:
652 mgb4_i2c_free(ser);
653
654 return rv;
655 }
656
fpga_init(struct mgb4_vout_dev * voutdev)657 static void fpga_init(struct mgb4_vout_dev *voutdev)
658 {
659 struct mgb4_regs *video = &voutdev->mgbdev->video;
660 const struct mgb4_vout_regs *regs = &voutdev->config->regs;
661
662 mgb4_write_reg(video, regs->config, 0x00000011);
663 mgb4_write_reg(video, regs->resolution, (1280 << 16) | 640);
664 mgb4_write_reg(video, regs->hsync, 0x00283232);
665 mgb4_write_reg(video, regs->vsync, 0x40141F1E);
666 mgb4_write_reg(video, regs->frame_limit, MGB4_HW_FREQ / 60);
667 mgb4_write_reg(video, regs->padding, 0x00000000);
668
669 voutdev->freq = mgb4_cmt_set_vout_freq(voutdev, 61150 >> 1) << 1;
670
671 mgb4_write_reg(video, regs->config,
672 (voutdev->config->id + MGB4_VIN_DEVICES) << 2 | 1 << 4);
673 }
674
create_debugfs(struct mgb4_vout_dev * voutdev)675 static void create_debugfs(struct mgb4_vout_dev *voutdev)
676 {
677 #ifdef CONFIG_DEBUG_FS
678 struct mgb4_regs *video = &voutdev->mgbdev->video;
679 struct dentry *entry;
680
681 if (IS_ERR_OR_NULL(voutdev->mgbdev->debugfs))
682 return;
683 entry = debugfs_create_dir(voutdev->vdev.name, voutdev->mgbdev->debugfs);
684 if (IS_ERR(entry))
685 return;
686
687 voutdev->regs[0].name = "CONFIG";
688 voutdev->regs[0].offset = voutdev->config->regs.config;
689 voutdev->regs[1].name = "STATUS";
690 voutdev->regs[1].offset = voutdev->config->regs.status;
691 voutdev->regs[2].name = "RESOLUTION";
692 voutdev->regs[2].offset = voutdev->config->regs.resolution;
693 voutdev->regs[3].name = "VIDEO_PARAMS_1";
694 voutdev->regs[3].offset = voutdev->config->regs.hsync;
695 voutdev->regs[4].name = "VIDEO_PARAMS_2";
696 voutdev->regs[4].offset = voutdev->config->regs.vsync;
697 voutdev->regs[5].name = "FRAME_LIMIT";
698 voutdev->regs[5].offset = voutdev->config->regs.frame_limit;
699 voutdev->regs[6].name = "PADDING_PIXELS";
700 voutdev->regs[6].offset = voutdev->config->regs.padding;
701 if (has_timeperframe(video)) {
702 voutdev->regs[7].name = "TIMER";
703 voutdev->regs[7].offset = voutdev->config->regs.timer;
704 voutdev->regset.nregs = 8;
705 } else {
706 voutdev->regset.nregs = 7;
707 }
708
709 voutdev->regset.base = video->membase;
710 voutdev->regset.regs = voutdev->regs;
711
712 debugfs_create_regset32("registers", 0444, entry, &voutdev->regset);
713 #endif
714 }
715
mgb4_vout_create(struct mgb4_dev * mgbdev,int id)716 struct mgb4_vout_dev *mgb4_vout_create(struct mgb4_dev *mgbdev, int id)
717 {
718 int rv, irq;
719 const struct attribute_group **groups;
720 struct mgb4_vout_dev *voutdev;
721 struct pci_dev *pdev = mgbdev->pdev;
722 struct device *dev = &pdev->dev;
723
724 voutdev = kzalloc(sizeof(*voutdev), GFP_KERNEL);
725 if (!voutdev)
726 return NULL;
727
728 voutdev->mgbdev = mgbdev;
729 voutdev->config = &vout_cfg[id];
730
731 /* Frame queue */
732 INIT_LIST_HEAD(&voutdev->buf_list);
733 spin_lock_init(&voutdev->qlock);
734
735 /* DMA transfer stuff */
736 INIT_WORK(&voutdev->dma_work, dma_transfer);
737
738 /* IRQ callback */
739 irq = xdma_get_user_irq(mgbdev->xdev, voutdev->config->irq);
740 rv = request_irq(irq, handler, 0, "mgb4-vout", voutdev);
741 if (rv) {
742 dev_err(dev, "failed to register irq handler\n");
743 goto err_alloc;
744 }
745
746 /* Set the FPGA registers default values */
747 fpga_init(voutdev);
748
749 /* Set the serializer default values */
750 rv = ser_init(voutdev, id);
751 if (rv)
752 goto err_irq;
753
754 /* V4L2 stuff init */
755 rv = v4l2_device_register(dev, &voutdev->v4l2dev);
756 if (rv) {
757 dev_err(dev, "failed to register v4l2 device\n");
758 goto err_irq;
759 }
760
761 mutex_init(&voutdev->lock);
762
763 voutdev->queue.type = V4L2_BUF_TYPE_VIDEO_OUTPUT;
764 voutdev->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_WRITE;
765 voutdev->queue.buf_struct_size = sizeof(struct mgb4_frame_buffer);
766 voutdev->queue.ops = &queue_ops;
767 voutdev->queue.mem_ops = &vb2_dma_sg_memops;
768 voutdev->queue.gfp_flags = GFP_DMA32;
769 voutdev->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
770 voutdev->queue.min_queued_buffers = 2;
771 voutdev->queue.drv_priv = voutdev;
772 voutdev->queue.lock = &voutdev->lock;
773 voutdev->queue.dev = dev;
774 rv = vb2_queue_init(&voutdev->queue);
775 if (rv) {
776 dev_err(dev, "failed to initialize vb2 queue\n");
777 goto err_v4l2_dev;
778 }
779
780 snprintf(voutdev->vdev.name, sizeof(voutdev->vdev.name), "mgb4-out%d",
781 id + 1);
782 voutdev->vdev.device_caps = V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_READWRITE
783 | V4L2_CAP_STREAMING;
784 voutdev->vdev.vfl_dir = VFL_DIR_TX;
785 voutdev->vdev.fops = &video_fops;
786 voutdev->vdev.ioctl_ops = &video_ioctl_ops;
787 voutdev->vdev.release = video_device_release_empty;
788 voutdev->vdev.v4l2_dev = &voutdev->v4l2dev;
789 voutdev->vdev.lock = &voutdev->lock;
790 voutdev->vdev.queue = &voutdev->queue;
791 video_set_drvdata(&voutdev->vdev, voutdev);
792
793 rv = video_register_device(&voutdev->vdev, VFL_TYPE_VIDEO, -1);
794 if (rv) {
795 dev_err(dev, "failed to register video device\n");
796 goto err_v4l2_dev;
797 }
798
799 /* Module sysfs attributes */
800 groups = MGB4_IS_GMSL(mgbdev)
801 ? mgb4_gmsl_out_groups : mgb4_fpdl3_out_groups;
802 rv = device_add_groups(&voutdev->vdev.dev, groups);
803 if (rv) {
804 dev_err(dev, "failed to create sysfs attributes\n");
805 goto err_video_dev;
806 }
807
808 create_debugfs(voutdev);
809
810 return voutdev;
811
812 err_video_dev:
813 video_unregister_device(&voutdev->vdev);
814 err_v4l2_dev:
815 v4l2_device_unregister(&voutdev->v4l2dev);
816 err_irq:
817 free_irq(irq, voutdev);
818 err_alloc:
819 kfree(voutdev);
820
821 return NULL;
822 }
823
mgb4_vout_free(struct mgb4_vout_dev * voutdev)824 void mgb4_vout_free(struct mgb4_vout_dev *voutdev)
825 {
826 const struct attribute_group **groups;
827 int irq = xdma_get_user_irq(voutdev->mgbdev->xdev, voutdev->config->irq);
828
829 free_irq(irq, voutdev);
830
831 groups = MGB4_IS_GMSL(voutdev->mgbdev)
832 ? mgb4_gmsl_out_groups : mgb4_fpdl3_out_groups;
833 device_remove_groups(&voutdev->vdev.dev, groups);
834
835 mgb4_i2c_free(&voutdev->ser);
836 video_unregister_device(&voutdev->vdev);
837 v4l2_device_unregister(&voutdev->v4l2dev);
838
839 kfree(voutdev);
840 }
841