1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * Copyright (C) 2021-2023 Digiteq Automotive
4 * author: Martin Tuma <martin.tuma@digiteqautomotive.com>
5 *
6 * This is the v4l2 input device module. It initializes the signal deserializers
7 * and creates the v4l2 video devices. The input signal can change at any time
8 * which is handled by the "timings" callbacks and an IRQ based watcher, that
9 * emits the V4L2_EVENT_SOURCE_CHANGE event in case of a signal source change.
10 *
11 * When the device is in loopback mode (a direct, in HW, in->out frame passing
12 * mode) the card's frame queue must be running regardless of whether a v4l2
13 * stream is running and the output parameters like frame buffers padding must
14 * be in sync with the input parameters.
15 */
16
17 #include <linux/pci.h>
18 #include <linux/workqueue.h>
19 #include <linux/align.h>
20 #include <linux/dma/amd_xdma.h>
21 #include <linux/v4l2-dv-timings.h>
22 #include <media/v4l2-ioctl.h>
23 #include <media/videobuf2-v4l2.h>
24 #include <media/videobuf2-dma-sg.h>
25 #include <media/v4l2-dv-timings.h>
26 #include <media/v4l2-event.h>
27 #include "mgb4_core.h"
28 #include "mgb4_dma.h"
29 #include "mgb4_sysfs.h"
30 #include "mgb4_io.h"
31 #include "mgb4_vout.h"
32 #include "mgb4_vin.h"
33
34 ATTRIBUTE_GROUPS(mgb4_fpdl3_in);
35 ATTRIBUTE_GROUPS(mgb4_gmsl_in);
36
37 static const struct mgb4_vin_config vin_cfg[] = {
38 {0, 0, 0, 6, {0x10, 0x00, 0x04, 0x08, 0x1C, 0x14, 0x18, 0x20, 0x24, 0x28, 0xE8}},
39 {1, 1, 1, 7, {0x40, 0x30, 0x34, 0x38, 0x4C, 0x44, 0x48, 0x50, 0x54, 0x58, 0xEC}}
40 };
41
42 static const struct i2c_board_info fpdl3_deser_info[] = {
43 {I2C_BOARD_INFO("deserializer1", 0x38)},
44 {I2C_BOARD_INFO("deserializer2", 0x36)},
45 };
46
47 static const struct i2c_board_info gmsl_deser_info[] = {
48 {I2C_BOARD_INFO("deserializer1", 0x4C)},
49 {I2C_BOARD_INFO("deserializer2", 0x2A)},
50 };
51
52 static const struct mgb4_i2c_kv fpdl3_i2c[] = {
53 {0x06, 0xFF, 0x04}, {0x07, 0xFF, 0x01}, {0x45, 0xFF, 0xE8},
54 {0x49, 0xFF, 0x00}, {0x34, 0xFF, 0x00}, {0x23, 0xFF, 0x00}
55 };
56
57 static const struct mgb4_i2c_kv gmsl_i2c[] = {
58 {0x01, 0x03, 0x03}, {0x300, 0x0C, 0x0C}, {0x03, 0xC0, 0xC0},
59 {0x1CE, 0x0E, 0x0E}, {0x11, 0x05, 0x00}, {0x05, 0xC0, 0x40},
60 {0x307, 0x0F, 0x00}, {0xA0, 0x03, 0x00}, {0x3E0, 0x07, 0x07},
61 {0x308, 0x01, 0x01}, {0x10, 0x20, 0x20}, {0x300, 0x40, 0x40}
62 };
63
64 static const struct v4l2_dv_timings_cap video_timings_cap = {
65 .type = V4L2_DV_BT_656_1120,
66 .bt = {
67 .min_width = 320,
68 .max_width = 4096,
69 .min_height = 240,
70 .max_height = 2160,
71 .min_pixelclock = 1843200, /* 320 x 240 x 24Hz */
72 .max_pixelclock = 530841600, /* 4096 x 2160 x 60Hz */
73 .standards = V4L2_DV_BT_STD_CEA861 | V4L2_DV_BT_STD_DMT |
74 V4L2_DV_BT_STD_CVT | V4L2_DV_BT_STD_GTF,
75 .capabilities = V4L2_DV_BT_CAP_PROGRESSIVE |
76 V4L2_DV_BT_CAP_CUSTOM,
77 },
78 };
79
80 /* Dummy timings when no signal present */
81 static const struct v4l2_dv_timings cea1080p60 = V4L2_DV_BT_CEA_1920X1080P60;
82
83 /*
84 * Returns the video output connected with the given video input if the input
85 * is in loopback mode.
86 */
loopback_dev(struct mgb4_vin_dev * vindev,int i)87 static struct mgb4_vout_dev *loopback_dev(struct mgb4_vin_dev *vindev, int i)
88 {
89 struct mgb4_vout_dev *voutdev;
90 u32 config;
91
92 voutdev = vindev->mgbdev->vout[i];
93 if (!voutdev)
94 return NULL;
95
96 config = mgb4_read_reg(&voutdev->mgbdev->video,
97 voutdev->config->regs.config);
98 if ((config & 0xc) >> 2 == vindev->config->id)
99 return voutdev;
100
101 return NULL;
102 }
103
104 /*
105 * Check, whether the loopback mode - a HW INPUT->OUTPUT transmission - is
106 * enabled on the given input.
107 */
loopback_active(struct mgb4_vin_dev * vindev)108 static int loopback_active(struct mgb4_vin_dev *vindev)
109 {
110 int i;
111
112 for (i = 0; i < MGB4_VOUT_DEVICES; i++)
113 if (loopback_dev(vindev, i))
114 return 1;
115
116 return 0;
117 }
118
119 /*
120 * Set the output frame buffer padding of all outputs connected with the given
121 * input when the video input is set to loopback mode. The paddings must be
122 * the same for the loopback to work properly.
123 */
set_loopback_padding(struct mgb4_vin_dev * vindev,u32 padding)124 static void set_loopback_padding(struct mgb4_vin_dev *vindev, u32 padding)
125 {
126 struct mgb4_regs *video = &vindev->mgbdev->video;
127 struct mgb4_vout_dev *voutdev;
128 int i;
129
130 for (i = 0; i < MGB4_VOUT_DEVICES; i++) {
131 voutdev = loopback_dev(vindev, i);
132 if (voutdev)
133 mgb4_write_reg(video, voutdev->config->regs.padding,
134 padding);
135 }
136 }
137
get_timings(struct mgb4_vin_dev * vindev,struct v4l2_dv_timings * timings)138 static int get_timings(struct mgb4_vin_dev *vindev,
139 struct v4l2_dv_timings *timings)
140 {
141 struct mgb4_regs *video = &vindev->mgbdev->video;
142 const struct mgb4_vin_regs *regs = &vindev->config->regs;
143
144 u32 status = mgb4_read_reg(video, regs->status);
145 u32 pclk = mgb4_read_reg(video, regs->pclk);
146 u32 signal = mgb4_read_reg(video, regs->signal);
147 u32 signal2 = mgb4_read_reg(video, regs->signal2);
148 u32 resolution = mgb4_read_reg(video, regs->resolution);
149
150 if (!(status & (1U << 2)))
151 return -ENOLCK;
152 if (!(status & (3 << 9)))
153 return -ENOLINK;
154
155 memset(timings, 0, sizeof(*timings));
156 timings->type = V4L2_DV_BT_656_1120;
157 timings->bt.width = resolution >> 16;
158 timings->bt.height = resolution & 0xFFFF;
159 if (status & (1U << 12))
160 timings->bt.polarities |= V4L2_DV_HSYNC_POS_POL;
161 if (status & (1U << 13))
162 timings->bt.polarities |= V4L2_DV_VSYNC_POS_POL;
163 timings->bt.pixelclock = pclk * 1000;
164 timings->bt.hsync = (signal & 0x00FF0000) >> 16;
165 timings->bt.vsync = (signal2 & 0x00FF0000) >> 16;
166 timings->bt.hbackporch = (signal & 0x0000FF00) >> 8;
167 timings->bt.hfrontporch = signal & 0x000000FF;
168 timings->bt.vbackporch = (signal2 & 0x0000FF00) >> 8;
169 timings->bt.vfrontporch = signal2 & 0x000000FF;
170
171 return 0;
172 }
173
return_all_buffers(struct mgb4_vin_dev * vindev,enum vb2_buffer_state state)174 static void return_all_buffers(struct mgb4_vin_dev *vindev,
175 enum vb2_buffer_state state)
176 {
177 struct mgb4_frame_buffer *buf, *node;
178 unsigned long flags;
179
180 spin_lock_irqsave(&vindev->qlock, flags);
181 list_for_each_entry_safe(buf, node, &vindev->buf_list, list) {
182 vb2_buffer_done(&buf->vb.vb2_buf, state);
183 list_del(&buf->list);
184 }
185 spin_unlock_irqrestore(&vindev->qlock, flags);
186 }
187
queue_setup(struct vb2_queue * q,unsigned int * nbuffers,unsigned int * nplanes,unsigned int sizes[],struct device * alloc_devs[])188 static int queue_setup(struct vb2_queue *q, unsigned int *nbuffers,
189 unsigned int *nplanes, unsigned int sizes[],
190 struct device *alloc_devs[])
191 {
192 struct mgb4_vin_dev *vindev = vb2_get_drv_priv(q);
193 struct mgb4_regs *video = &vindev->mgbdev->video;
194 u32 config = mgb4_read_reg(video, vindev->config->regs.config);
195 u32 pixelsize = (config & (1U << 16)) ? 2 : 4;
196 unsigned int size = (vindev->timings.bt.width + vindev->padding)
197 * vindev->timings.bt.height * pixelsize;
198
199 /*
200 * If I/O reconfiguration is in process, do not allow to start
201 * the queue. See video_source_store() in mgb4_sysfs_out.c for
202 * details.
203 */
204 if (test_bit(0, &vindev->mgbdev->io_reconfig))
205 return -EBUSY;
206
207 if (!size)
208 return -EINVAL;
209 if (*nplanes)
210 return sizes[0] < size ? -EINVAL : 0;
211 *nplanes = 1;
212 sizes[0] = size;
213
214 return 0;
215 }
216
buffer_init(struct vb2_buffer * vb)217 static int buffer_init(struct vb2_buffer *vb)
218 {
219 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
220 struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
221
222 INIT_LIST_HEAD(&buf->list);
223
224 return 0;
225 }
226
buffer_prepare(struct vb2_buffer * vb)227 static int buffer_prepare(struct vb2_buffer *vb)
228 {
229 struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
230 struct mgb4_regs *video = &vindev->mgbdev->video;
231 struct device *dev = &vindev->mgbdev->pdev->dev;
232 u32 config = mgb4_read_reg(video, vindev->config->regs.config);
233 u32 pixelsize = (config & (1U << 16)) ? 2 : 4;
234 unsigned int size = (vindev->timings.bt.width + vindev->padding)
235 * vindev->timings.bt.height * pixelsize;
236
237 if (vb2_plane_size(vb, 0) < size) {
238 dev_err(dev, "buffer too small (%lu < %u)\n",
239 vb2_plane_size(vb, 0), size);
240 return -EINVAL;
241 }
242
243 vb2_set_plane_payload(vb, 0, size);
244
245 return 0;
246 }
247
buffer_queue(struct vb2_buffer * vb)248 static void buffer_queue(struct vb2_buffer *vb)
249 {
250 struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vb->vb2_queue);
251 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
252 struct mgb4_frame_buffer *buf = to_frame_buffer(vbuf);
253 unsigned long flags;
254
255 spin_lock_irqsave(&vindev->qlock, flags);
256 list_add_tail(&buf->list, &vindev->buf_list);
257 spin_unlock_irqrestore(&vindev->qlock, flags);
258 }
259
stop_streaming(struct vb2_queue * vq)260 static void stop_streaming(struct vb2_queue *vq)
261 {
262 struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vq);
263 struct mgb4_regs *video = &vindev->mgbdev->video;
264 const struct mgb4_vin_config *config = vindev->config;
265 int irq = xdma_get_user_irq(vindev->mgbdev->xdev, config->vin_irq);
266
267 xdma_disable_user_irq(vindev->mgbdev->xdev, irq);
268
269 /*
270 * In loopback mode, the HW frame queue must be left running for
271 * the IN->OUT transmission to work!
272 */
273 if (!loopback_active(vindev))
274 mgb4_mask_reg(&vindev->mgbdev->video, config->regs.config, 0x2,
275 0x0);
276
277 mgb4_write_reg(video, vindev->config->regs.padding, 0);
278 set_loopback_padding(vindev, 0);
279
280 cancel_work_sync(&vindev->dma_work);
281 return_all_buffers(vindev, VB2_BUF_STATE_ERROR);
282 }
283
start_streaming(struct vb2_queue * vq,unsigned int count)284 static int start_streaming(struct vb2_queue *vq, unsigned int count)
285 {
286 struct mgb4_vin_dev *vindev = vb2_get_drv_priv(vq);
287 struct mgb4_regs *video = &vindev->mgbdev->video;
288 const struct mgb4_vin_config *config = vindev->config;
289 int irq = xdma_get_user_irq(vindev->mgbdev->xdev, config->vin_irq);
290
291 vindev->sequence = 0;
292
293 /*
294 * In loopback mode, the HW frame queue is already running.
295 */
296 if (!loopback_active(vindev))
297 mgb4_mask_reg(&vindev->mgbdev->video, config->regs.config, 0x2,
298 0x2);
299
300 mgb4_write_reg(video, vindev->config->regs.padding, vindev->padding);
301 set_loopback_padding(vindev, vindev->padding);
302
303 xdma_enable_user_irq(vindev->mgbdev->xdev, irq);
304
305 return 0;
306 }
307
308 static const struct vb2_ops queue_ops = {
309 .queue_setup = queue_setup,
310 .buf_init = buffer_init,
311 .buf_prepare = buffer_prepare,
312 .buf_queue = buffer_queue,
313 .start_streaming = start_streaming,
314 .stop_streaming = stop_streaming,
315 };
316
fh_open(struct file * file)317 static int fh_open(struct file *file)
318 {
319 struct mgb4_vin_dev *vindev = video_drvdata(file);
320 int rv;
321
322 mutex_lock(&vindev->lock);
323
324 rv = v4l2_fh_open(file);
325 if (rv)
326 goto out;
327
328 if (!v4l2_fh_is_singular_file(file))
329 goto out;
330
331 if (get_timings(vindev, &vindev->timings) < 0)
332 vindev->timings = cea1080p60;
333
334 out:
335 mutex_unlock(&vindev->lock);
336 return rv;
337 }
338
339 static const struct v4l2_file_operations video_fops = {
340 .owner = THIS_MODULE,
341 .open = fh_open,
342 .release = vb2_fop_release,
343 .unlocked_ioctl = video_ioctl2,
344 .read = vb2_fop_read,
345 .mmap = vb2_fop_mmap,
346 .poll = vb2_fop_poll,
347 };
348
vidioc_querycap(struct file * file,void * priv,struct v4l2_capability * cap)349 static int vidioc_querycap(struct file *file, void *priv,
350 struct v4l2_capability *cap)
351 {
352 strscpy(cap->driver, KBUILD_MODNAME, sizeof(cap->driver));
353 strscpy(cap->card, "MGB4 PCIe Card", sizeof(cap->card));
354
355 return 0;
356 }
357
vidioc_enum_fmt(struct file * file,void * priv,struct v4l2_fmtdesc * f)358 static int vidioc_enum_fmt(struct file *file, void *priv,
359 struct v4l2_fmtdesc *f)
360 {
361 struct mgb4_vin_dev *vindev = video_drvdata(file);
362 struct mgb4_regs *video = &vindev->mgbdev->video;
363
364 if (f->index == 0) {
365 f->pixelformat = V4L2_PIX_FMT_ABGR32;
366 return 0;
367 } else if (f->index == 1 && has_yuv(video)) {
368 f->pixelformat = V4L2_PIX_FMT_YUYV;
369 return 0;
370 } else {
371 return -EINVAL;
372 }
373 }
374
vidioc_enum_frameintervals(struct file * file,void * priv,struct v4l2_frmivalenum * ival)375 static int vidioc_enum_frameintervals(struct file *file, void *priv,
376 struct v4l2_frmivalenum *ival)
377 {
378 struct mgb4_vin_dev *vindev = video_drvdata(file);
379 struct mgb4_regs *video = &vindev->mgbdev->video;
380
381 if (ival->index != 0)
382 return -EINVAL;
383 if (!(ival->pixel_format == V4L2_PIX_FMT_ABGR32 ||
384 ((has_yuv(video) && ival->pixel_format == V4L2_PIX_FMT_YUYV))))
385 return -EINVAL;
386 if (ival->width != vindev->timings.bt.width ||
387 ival->height != vindev->timings.bt.height)
388 return -EINVAL;
389
390 ival->type = V4L2_FRMIVAL_TYPE_STEPWISE;
391 ival->stepwise.max.denominator = MGB4_HW_FREQ;
392 ival->stepwise.max.numerator = 0xFFFFFFFF;
393 ival->stepwise.min.denominator = vindev->timings.bt.pixelclock;
394 ival->stepwise.min.numerator = pixel_size(&vindev->timings);
395 ival->stepwise.step.denominator = MGB4_HW_FREQ;
396 ival->stepwise.step.numerator = 1;
397
398 return 0;
399 }
400
vidioc_g_fmt(struct file * file,void * priv,struct v4l2_format * f)401 static int vidioc_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
402 {
403 struct mgb4_vin_dev *vindev = video_drvdata(file);
404 struct mgb4_regs *video = &vindev->mgbdev->video;
405 u32 config = mgb4_read_reg(video, vindev->config->regs.config);
406
407 f->fmt.pix.width = vindev->timings.bt.width;
408 f->fmt.pix.height = vindev->timings.bt.height;
409 f->fmt.pix.field = V4L2_FIELD_NONE;
410
411 if (config & (1U << 16)) {
412 f->fmt.pix.pixelformat = V4L2_PIX_FMT_YUYV;
413 if (config & (1U << 20)) {
414 f->fmt.pix.colorspace = V4L2_COLORSPACE_REC709;
415 } else {
416 if (config & (1U << 19))
417 f->fmt.pix.colorspace = V4L2_COLORSPACE_SMPTE170M;
418 else
419 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
420 }
421 f->fmt.pix.bytesperline = (f->fmt.pix.width + vindev->padding) * 2;
422 } else {
423 f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
424 f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
425 f->fmt.pix.bytesperline = (f->fmt.pix.width + vindev->padding) * 4;
426 }
427 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
428
429 return 0;
430 }
431
vidioc_try_fmt(struct file * file,void * priv,struct v4l2_format * f)432 static int vidioc_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
433 {
434 struct mgb4_vin_dev *vindev = video_drvdata(file);
435 struct mgb4_regs *video = &vindev->mgbdev->video;
436 u32 pixelsize;
437
438 f->fmt.pix.width = vindev->timings.bt.width;
439 f->fmt.pix.height = vindev->timings.bt.height;
440 f->fmt.pix.field = V4L2_FIELD_NONE;
441
442 if (has_yuv(video) && f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV) {
443 pixelsize = 2;
444 if (!(f->fmt.pix.colorspace == V4L2_COLORSPACE_REC709 ||
445 f->fmt.pix.colorspace == V4L2_COLORSPACE_SMPTE170M))
446 f->fmt.pix.colorspace = V4L2_COLORSPACE_SRGB;
447 } else {
448 pixelsize = 4;
449 f->fmt.pix.pixelformat = V4L2_PIX_FMT_ABGR32;
450 f->fmt.pix.colorspace = V4L2_COLORSPACE_RAW;
451 }
452
453 if (f->fmt.pix.bytesperline > f->fmt.pix.width * pixelsize &&
454 f->fmt.pix.bytesperline < f->fmt.pix.width * pixelsize * 2)
455 f->fmt.pix.bytesperline = ALIGN(f->fmt.pix.bytesperline,
456 pixelsize);
457 else
458 f->fmt.pix.bytesperline = f->fmt.pix.width * pixelsize;
459 f->fmt.pix.sizeimage = f->fmt.pix.bytesperline * f->fmt.pix.height;
460
461 return 0;
462 }
463
vidioc_s_fmt(struct file * file,void * priv,struct v4l2_format * f)464 static int vidioc_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
465 {
466 struct mgb4_vin_dev *vindev = video_drvdata(file);
467 struct mgb4_regs *video = &vindev->mgbdev->video;
468 u32 config, pixelsize;
469
470 if (vb2_is_busy(&vindev->queue))
471 return -EBUSY;
472
473 vidioc_try_fmt(file, priv, f);
474
475 config = mgb4_read_reg(video, vindev->config->regs.config);
476 if (f->fmt.pix.pixelformat == V4L2_PIX_FMT_YUYV) {
477 pixelsize = 2;
478 config |= 1U << 16;
479
480 if (f->fmt.pix.colorspace == V4L2_COLORSPACE_REC709) {
481 config |= 1U << 20;
482 config |= 1U << 19;
483 } else if (f->fmt.pix.colorspace == V4L2_COLORSPACE_SMPTE170M) {
484 config &= ~(1U << 20);
485 config |= 1U << 19;
486 } else {
487 config &= ~(1U << 20);
488 config &= ~(1U << 19);
489 }
490 } else {
491 pixelsize = 4;
492 config &= ~(1U << 16);
493 }
494 mgb4_write_reg(video, vindev->config->regs.config, config);
495
496 vindev->padding = (f->fmt.pix.bytesperline - (f->fmt.pix.width
497 * pixelsize)) / pixelsize;
498
499 return 0;
500 }
501
vidioc_enum_input(struct file * file,void * priv,struct v4l2_input * i)502 static int vidioc_enum_input(struct file *file, void *priv,
503 struct v4l2_input *i)
504 {
505 struct mgb4_vin_dev *vindev = video_drvdata(file);
506 struct mgb4_regs *video = &vindev->mgbdev->video;
507 u32 status;
508
509 if (i->index != 0)
510 return -EINVAL;
511
512 strscpy(i->name, "MGB4", sizeof(i->name));
513 i->type = V4L2_INPUT_TYPE_CAMERA;
514 i->capabilities = V4L2_IN_CAP_DV_TIMINGS;
515 i->status = 0;
516
517 status = mgb4_read_reg(video, vindev->config->regs.status);
518 if (!(status & (1U << 2)))
519 i->status |= V4L2_IN_ST_NO_SYNC;
520 if (!(status & (3 << 9)))
521 i->status |= V4L2_IN_ST_NO_SIGNAL;
522
523 return 0;
524 }
525
vidioc_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)526 static int vidioc_enum_framesizes(struct file *file, void *fh,
527 struct v4l2_frmsizeenum *fsize)
528 {
529 struct mgb4_vin_dev *vindev = video_drvdata(file);
530
531 if (fsize->index != 0 || !(fsize->pixel_format == V4L2_PIX_FMT_ABGR32 ||
532 fsize->pixel_format == V4L2_PIX_FMT_YUYV))
533 return -EINVAL;
534
535 fsize->discrete.width = vindev->timings.bt.width;
536 fsize->discrete.height = vindev->timings.bt.height;
537 fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
538
539 return 0;
540 }
541
vidioc_s_input(struct file * file,void * priv,unsigned int i)542 static int vidioc_s_input(struct file *file, void *priv, unsigned int i)
543 {
544 return (i == 0) ? 0 : -EINVAL;
545 }
546
vidioc_g_input(struct file * file,void * priv,unsigned int * i)547 static int vidioc_g_input(struct file *file, void *priv, unsigned int *i)
548 {
549 *i = 0;
550 return 0;
551 }
552
vidioc_g_parm(struct file * file,void * priv,struct v4l2_streamparm * parm)553 static int vidioc_g_parm(struct file *file, void *priv,
554 struct v4l2_streamparm *parm)
555 {
556 struct mgb4_vin_dev *vindev = video_drvdata(file);
557 struct mgb4_regs *video = &vindev->mgbdev->video;
558 struct v4l2_fract *tpf = &parm->parm.output.timeperframe;
559 u32 timer;
560
561 parm->parm.capture.readbuffers = 2;
562
563 if (has_timeperframe(video)) {
564 timer = mgb4_read_reg(video, vindev->config->regs.timer);
565 if (timer < 0xFFFF) {
566 tpf->numerator = pixel_size(&vindev->timings);
567 tpf->denominator = vindev->timings.bt.pixelclock;
568 } else {
569 tpf->numerator = timer;
570 tpf->denominator = MGB4_HW_FREQ;
571 }
572
573 parm->parm.output.capability = V4L2_CAP_TIMEPERFRAME;
574 }
575
576 return 0;
577 }
578
vidioc_s_parm(struct file * file,void * priv,struct v4l2_streamparm * parm)579 static int vidioc_s_parm(struct file *file, void *priv,
580 struct v4l2_streamparm *parm)
581 {
582 struct mgb4_vin_dev *vindev = video_drvdata(file);
583 struct mgb4_regs *video = &vindev->mgbdev->video;
584 struct v4l2_fract *tpf = &parm->parm.output.timeperframe;
585 u32 period, timer;
586
587 if (has_timeperframe(video)) {
588 timer = tpf->denominator ?
589 MGB4_PERIOD(tpf->numerator, tpf->denominator) : 0;
590 if (timer) {
591 period = MGB4_PERIOD(pixel_size(&vindev->timings),
592 vindev->timings.bt.pixelclock);
593 if (timer < period)
594 timer = 0;
595 }
596
597 mgb4_write_reg(video, vindev->config->regs.timer, timer);
598 }
599
600 return vidioc_g_parm(file, priv, parm);
601 }
602
vidioc_s_dv_timings(struct file * file,void * fh,struct v4l2_dv_timings * timings)603 static int vidioc_s_dv_timings(struct file *file, void *fh,
604 struct v4l2_dv_timings *timings)
605 {
606 struct mgb4_vin_dev *vindev = video_drvdata(file);
607
608 if (timings->bt.width < video_timings_cap.bt.min_width ||
609 timings->bt.width > video_timings_cap.bt.max_width ||
610 timings->bt.height < video_timings_cap.bt.min_height ||
611 timings->bt.height > video_timings_cap.bt.max_height)
612 return -EINVAL;
613 if (timings->bt.width == vindev->timings.bt.width &&
614 timings->bt.height == vindev->timings.bt.height)
615 return 0;
616 if (vb2_is_busy(&vindev->queue))
617 return -EBUSY;
618
619 vindev->timings = *timings;
620
621 return 0;
622 }
623
vidioc_g_dv_timings(struct file * file,void * fh,struct v4l2_dv_timings * timings)624 static int vidioc_g_dv_timings(struct file *file, void *fh,
625 struct v4l2_dv_timings *timings)
626 {
627 struct mgb4_vin_dev *vindev = video_drvdata(file);
628 *timings = vindev->timings;
629
630 return 0;
631 }
632
vidioc_query_dv_timings(struct file * file,void * fh,struct v4l2_dv_timings * timings)633 static int vidioc_query_dv_timings(struct file *file, void *fh,
634 struct v4l2_dv_timings *timings)
635 {
636 struct mgb4_vin_dev *vindev = video_drvdata(file);
637
638 return get_timings(vindev, timings);
639 }
640
vidioc_enum_dv_timings(struct file * file,void * fh,struct v4l2_enum_dv_timings * timings)641 static int vidioc_enum_dv_timings(struct file *file, void *fh,
642 struct v4l2_enum_dv_timings *timings)
643 {
644 return v4l2_enum_dv_timings_cap(timings, &video_timings_cap, NULL, NULL);
645 }
646
vidioc_dv_timings_cap(struct file * file,void * fh,struct v4l2_dv_timings_cap * cap)647 static int vidioc_dv_timings_cap(struct file *file, void *fh,
648 struct v4l2_dv_timings_cap *cap)
649 {
650 *cap = video_timings_cap;
651
652 return 0;
653 }
654
vidioc_subscribe_event(struct v4l2_fh * fh,const struct v4l2_event_subscription * sub)655 static int vidioc_subscribe_event(struct v4l2_fh *fh,
656 const struct v4l2_event_subscription *sub)
657 {
658 switch (sub->type) {
659 case V4L2_EVENT_SOURCE_CHANGE:
660 return v4l2_src_change_event_subscribe(fh, sub);
661 }
662
663 return v4l2_ctrl_subscribe_event(fh, sub);
664 }
665
666 static const struct v4l2_ioctl_ops video_ioctl_ops = {
667 .vidioc_querycap = vidioc_querycap,
668 .vidioc_enum_fmt_vid_cap = vidioc_enum_fmt,
669 .vidioc_try_fmt_vid_cap = vidioc_try_fmt,
670 .vidioc_s_fmt_vid_cap = vidioc_s_fmt,
671 .vidioc_g_fmt_vid_cap = vidioc_g_fmt,
672 .vidioc_enum_framesizes = vidioc_enum_framesizes,
673 .vidioc_enum_frameintervals = vidioc_enum_frameintervals,
674 .vidioc_enum_input = vidioc_enum_input,
675 .vidioc_g_input = vidioc_g_input,
676 .vidioc_s_input = vidioc_s_input,
677 .vidioc_reqbufs = vb2_ioctl_reqbufs,
678 .vidioc_create_bufs = vb2_ioctl_create_bufs,
679 .vidioc_prepare_buf = vb2_ioctl_prepare_buf,
680 .vidioc_querybuf = vb2_ioctl_querybuf,
681 .vidioc_qbuf = vb2_ioctl_qbuf,
682 .vidioc_dqbuf = vb2_ioctl_dqbuf,
683 .vidioc_expbuf = vb2_ioctl_expbuf,
684 .vidioc_streamon = vb2_ioctl_streamon,
685 .vidioc_streamoff = vb2_ioctl_streamoff,
686 .vidioc_g_parm = vidioc_g_parm,
687 .vidioc_s_parm = vidioc_s_parm,
688 .vidioc_dv_timings_cap = vidioc_dv_timings_cap,
689 .vidioc_enum_dv_timings = vidioc_enum_dv_timings,
690 .vidioc_g_dv_timings = vidioc_g_dv_timings,
691 .vidioc_s_dv_timings = vidioc_s_dv_timings,
692 .vidioc_query_dv_timings = vidioc_query_dv_timings,
693 .vidioc_subscribe_event = vidioc_subscribe_event,
694 .vidioc_unsubscribe_event = v4l2_event_unsubscribe,
695 };
696
dma_transfer(struct work_struct * work)697 static void dma_transfer(struct work_struct *work)
698 {
699 struct mgb4_vin_dev *vindev = container_of(work, struct mgb4_vin_dev,
700 dma_work);
701 struct mgb4_regs *video = &vindev->mgbdev->video;
702 struct device *dev = &vindev->mgbdev->pdev->dev;
703 struct mgb4_frame_buffer *buf = NULL;
704 unsigned long flags;
705 u32 addr;
706 int rv;
707
708 spin_lock_irqsave(&vindev->qlock, flags);
709 if (!list_empty(&vindev->buf_list)) {
710 buf = list_first_entry(&vindev->buf_list,
711 struct mgb4_frame_buffer, list);
712 list_del_init(vindev->buf_list.next);
713 }
714 spin_unlock_irqrestore(&vindev->qlock, flags);
715
716 if (!buf)
717 return;
718
719 addr = mgb4_read_reg(video, vindev->config->regs.address);
720 if (addr >= MGB4_ERR_QUEUE_FULL) {
721 dev_dbg(dev, "frame queue error (%d)\n", (int)addr);
722 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
723 return;
724 }
725
726 rv = mgb4_dma_transfer(vindev->mgbdev, vindev->config->dma_channel,
727 false, addr,
728 vb2_dma_sg_plane_desc(&buf->vb.vb2_buf, 0));
729 if (rv < 0) {
730 dev_warn(dev, "DMA transfer error\n");
731 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_ERROR);
732 } else {
733 buf->vb.vb2_buf.timestamp = ktime_get_ns();
734 buf->vb.sequence = vindev->sequence++;
735 buf->vb.field = V4L2_FIELD_NONE;
736 vb2_buffer_done(&buf->vb.vb2_buf, VB2_BUF_STATE_DONE);
737 }
738 }
739
signal_change(struct work_struct * work)740 static void signal_change(struct work_struct *work)
741 {
742 struct mgb4_vin_dev *vindev = container_of(work, struct mgb4_vin_dev,
743 err_work);
744 struct mgb4_regs *video = &vindev->mgbdev->video;
745 struct v4l2_bt_timings *timings = &vindev->timings.bt;
746 struct device *dev = &vindev->mgbdev->pdev->dev;
747
748 u32 resolution = mgb4_read_reg(video, vindev->config->regs.resolution);
749 u32 width = resolution >> 16;
750 u32 height = resolution & 0xFFFF;
751
752 if (timings->width != width || timings->height != height) {
753 static const struct v4l2_event ev = {
754 .type = V4L2_EVENT_SOURCE_CHANGE,
755 .u.src_change.changes = V4L2_EVENT_SRC_CH_RESOLUTION,
756 };
757
758 v4l2_event_queue(&vindev->vdev, &ev);
759
760 if (vb2_is_streaming(&vindev->queue))
761 vb2_queue_error(&vindev->queue);
762 }
763
764 dev_dbg(dev, "stream changed to %ux%u\n", width, height);
765 }
766
vin_handler(int irq,void * ctx)767 static irqreturn_t vin_handler(int irq, void *ctx)
768 {
769 struct mgb4_vin_dev *vindev = (struct mgb4_vin_dev *)ctx;
770 struct mgb4_regs *video = &vindev->mgbdev->video;
771
772 schedule_work(&vindev->dma_work);
773
774 mgb4_write_reg(video, 0xB4, 1U << vindev->config->vin_irq);
775
776 return IRQ_HANDLED;
777 }
778
err_handler(int irq,void * ctx)779 static irqreturn_t err_handler(int irq, void *ctx)
780 {
781 struct mgb4_vin_dev *vindev = (struct mgb4_vin_dev *)ctx;
782 struct mgb4_regs *video = &vindev->mgbdev->video;
783
784 schedule_work(&vindev->err_work);
785
786 mgb4_write_reg(video, 0xB4, 1U << vindev->config->err_irq);
787
788 return IRQ_HANDLED;
789 }
790
deser_init(struct mgb4_vin_dev * vindev,int id)791 static int deser_init(struct mgb4_vin_dev *vindev, int id)
792 {
793 int rv, addr_size;
794 size_t values_count;
795 const struct mgb4_i2c_kv *values;
796 const struct i2c_board_info *info;
797 struct device *dev = &vindev->mgbdev->pdev->dev;
798
799 if (MGB4_IS_GMSL(vindev->mgbdev)) {
800 info = &gmsl_deser_info[id];
801 addr_size = 16;
802 values = gmsl_i2c;
803 values_count = ARRAY_SIZE(gmsl_i2c);
804 } else {
805 info = &fpdl3_deser_info[id];
806 addr_size = 8;
807 values = fpdl3_i2c;
808 values_count = ARRAY_SIZE(fpdl3_i2c);
809 }
810
811 rv = mgb4_i2c_init(&vindev->deser, vindev->mgbdev->i2c_adap, info,
812 addr_size);
813 if (rv < 0) {
814 dev_err(dev, "failed to create deserializer\n");
815 return rv;
816 }
817 rv = mgb4_i2c_configure(&vindev->deser, values, values_count);
818 if (rv < 0) {
819 dev_err(dev, "failed to configure deserializer\n");
820 goto err_i2c_dev;
821 }
822
823 return 0;
824
825 err_i2c_dev:
826 mgb4_i2c_free(&vindev->deser);
827
828 return rv;
829 }
830
fpga_init(struct mgb4_vin_dev * vindev)831 static void fpga_init(struct mgb4_vin_dev *vindev)
832 {
833 struct mgb4_regs *video = &vindev->mgbdev->video;
834 const struct mgb4_vin_regs *regs = &vindev->config->regs;
835
836 mgb4_write_reg(video, regs->config, 0x00000001);
837 mgb4_write_reg(video, regs->sync, 0x03E80002);
838 mgb4_write_reg(video, regs->padding, 0x00000000);
839 mgb4_write_reg(video, regs->config, 1U << 9);
840 }
841
create_debugfs(struct mgb4_vin_dev * vindev)842 static void create_debugfs(struct mgb4_vin_dev *vindev)
843 {
844 #ifdef CONFIG_DEBUG_FS
845 struct mgb4_regs *video = &vindev->mgbdev->video;
846 struct dentry *entry;
847
848 if (IS_ERR_OR_NULL(vindev->mgbdev->debugfs))
849 return;
850 entry = debugfs_create_dir(vindev->vdev.name, vindev->mgbdev->debugfs);
851 if (IS_ERR(entry))
852 return;
853
854 vindev->regs[0].name = "CONFIG";
855 vindev->regs[0].offset = vindev->config->regs.config;
856 vindev->regs[1].name = "STATUS";
857 vindev->regs[1].offset = vindev->config->regs.status;
858 vindev->regs[2].name = "RESOLUTION";
859 vindev->regs[2].offset = vindev->config->regs.resolution;
860 vindev->regs[3].name = "FRAME_PERIOD";
861 vindev->regs[3].offset = vindev->config->regs.frame_period;
862 vindev->regs[4].name = "HS_VS_GENER_SETTINGS";
863 vindev->regs[4].offset = vindev->config->regs.sync;
864 vindev->regs[5].name = "PCLK_FREQUENCY";
865 vindev->regs[5].offset = vindev->config->regs.pclk;
866 vindev->regs[6].name = "VIDEO_PARAMS_1";
867 vindev->regs[6].offset = vindev->config->regs.signal;
868 vindev->regs[7].name = "VIDEO_PARAMS_2";
869 vindev->regs[7].offset = vindev->config->regs.signal2;
870 vindev->regs[8].name = "PADDING_PIXELS";
871 vindev->regs[8].offset = vindev->config->regs.padding;
872 if (has_timeperframe(video)) {
873 vindev->regs[9].name = "TIMER";
874 vindev->regs[9].offset = vindev->config->regs.timer;
875 vindev->regset.nregs = 10;
876 } else {
877 vindev->regset.nregs = 9;
878 }
879
880 vindev->regset.base = video->membase;
881 vindev->regset.regs = vindev->regs;
882
883 debugfs_create_regset32("registers", 0444, entry, &vindev->regset);
884 #endif
885 }
886
mgb4_vin_create(struct mgb4_dev * mgbdev,int id)887 struct mgb4_vin_dev *mgb4_vin_create(struct mgb4_dev *mgbdev, int id)
888 {
889 int rv;
890 const struct attribute_group **groups;
891 struct mgb4_vin_dev *vindev;
892 struct pci_dev *pdev = mgbdev->pdev;
893 struct device *dev = &pdev->dev;
894 int vin_irq, err_irq;
895
896 vindev = kzalloc(sizeof(*vindev), GFP_KERNEL);
897 if (!vindev)
898 return NULL;
899
900 vindev->mgbdev = mgbdev;
901 vindev->config = &vin_cfg[id];
902
903 /* Frame queue*/
904 INIT_LIST_HEAD(&vindev->buf_list);
905 spin_lock_init(&vindev->qlock);
906
907 /* Work queues */
908 INIT_WORK(&vindev->dma_work, dma_transfer);
909 INIT_WORK(&vindev->err_work, signal_change);
910
911 /* IRQ callback */
912 vin_irq = xdma_get_user_irq(mgbdev->xdev, vindev->config->vin_irq);
913 rv = request_irq(vin_irq, vin_handler, 0, "mgb4-vin", vindev);
914 if (rv) {
915 dev_err(dev, "failed to register vin irq handler\n");
916 goto err_alloc;
917 }
918 /* Error IRQ callback */
919 err_irq = xdma_get_user_irq(mgbdev->xdev, vindev->config->err_irq);
920 rv = request_irq(err_irq, err_handler, 0, "mgb4-err", vindev);
921 if (rv) {
922 dev_err(dev, "failed to register err irq handler\n");
923 goto err_vin_irq;
924 }
925
926 /* Set the FPGA registers default values */
927 fpga_init(vindev);
928
929 /* Set the deserializer default values */
930 rv = deser_init(vindev, id);
931 if (rv)
932 goto err_err_irq;
933
934 /* V4L2 stuff init */
935 rv = v4l2_device_register(dev, &vindev->v4l2dev);
936 if (rv) {
937 dev_err(dev, "failed to register v4l2 device\n");
938 goto err_err_irq;
939 }
940
941 mutex_init(&vindev->lock);
942
943 vindev->queue.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
944 vindev->queue.io_modes = VB2_MMAP | VB2_DMABUF | VB2_READ;
945 vindev->queue.buf_struct_size = sizeof(struct mgb4_frame_buffer);
946 vindev->queue.ops = &queue_ops;
947 vindev->queue.mem_ops = &vb2_dma_sg_memops;
948 vindev->queue.gfp_flags = GFP_DMA32;
949 vindev->queue.timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
950 vindev->queue.min_queued_buffers = 2;
951 vindev->queue.drv_priv = vindev;
952 vindev->queue.lock = &vindev->lock;
953 vindev->queue.dev = dev;
954 rv = vb2_queue_init(&vindev->queue);
955 if (rv) {
956 dev_err(dev, "failed to initialize vb2 queue\n");
957 goto err_v4l2_dev;
958 }
959
960 snprintf(vindev->vdev.name, sizeof(vindev->vdev.name), "mgb4-in%d",
961 id + 1);
962 vindev->vdev.device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_READWRITE
963 | V4L2_CAP_STREAMING;
964 vindev->vdev.fops = &video_fops;
965 vindev->vdev.ioctl_ops = &video_ioctl_ops;
966 vindev->vdev.release = video_device_release_empty;
967 vindev->vdev.v4l2_dev = &vindev->v4l2dev;
968 vindev->vdev.lock = &vindev->lock;
969 vindev->vdev.queue = &vindev->queue;
970 video_set_drvdata(&vindev->vdev, vindev);
971
972 /* Enable the video signal change watcher */
973 xdma_enable_user_irq(vindev->mgbdev->xdev, err_irq);
974
975 /* Register the video device */
976 rv = video_register_device(&vindev->vdev, VFL_TYPE_VIDEO, -1);
977 if (rv) {
978 dev_err(dev, "failed to register video device\n");
979 goto err_v4l2_dev;
980 }
981
982 /* Module sysfs attributes */
983 groups = MGB4_IS_GMSL(mgbdev)
984 ? mgb4_gmsl_in_groups : mgb4_fpdl3_in_groups;
985 rv = device_add_groups(&vindev->vdev.dev, groups);
986 if (rv) {
987 dev_err(dev, "failed to create sysfs attributes\n");
988 goto err_video_dev;
989 }
990
991 create_debugfs(vindev);
992
993 return vindev;
994
995 err_video_dev:
996 video_unregister_device(&vindev->vdev);
997 err_v4l2_dev:
998 v4l2_device_unregister(&vindev->v4l2dev);
999 err_err_irq:
1000 free_irq(err_irq, vindev);
1001 err_vin_irq:
1002 free_irq(vin_irq, vindev);
1003 err_alloc:
1004 kfree(vindev);
1005
1006 return NULL;
1007 }
1008
mgb4_vin_free(struct mgb4_vin_dev * vindev)1009 void mgb4_vin_free(struct mgb4_vin_dev *vindev)
1010 {
1011 const struct attribute_group **groups;
1012 int vin_irq = xdma_get_user_irq(vindev->mgbdev->xdev,
1013 vindev->config->vin_irq);
1014 int err_irq = xdma_get_user_irq(vindev->mgbdev->xdev,
1015 vindev->config->err_irq);
1016
1017 xdma_disable_user_irq(vindev->mgbdev->xdev, err_irq);
1018
1019 free_irq(vin_irq, vindev);
1020 free_irq(err_irq, vindev);
1021
1022 groups = MGB4_IS_GMSL(vindev->mgbdev)
1023 ? mgb4_gmsl_in_groups : mgb4_fpdl3_in_groups;
1024 device_remove_groups(&vindev->vdev.dev, groups);
1025
1026 mgb4_i2c_free(&vindev->deser);
1027 video_unregister_device(&vindev->vdev);
1028 v4l2_device_unregister(&vindev->v4l2dev);
1029
1030 kfree(vindev);
1031 }
1032