1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2021-2022 Bootlin
4 * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
5 */
6
7 #include <linux/pm_runtime.h>
8 #include <linux/regmap.h>
9 #include <media/v4l2-device.h>
10 #include <media/v4l2-fwnode.h>
11
12 #include "sun6i_csi.h"
13 #include "sun6i_csi_bridge.h"
14 #include "sun6i_csi_reg.h"
15
16 /* Helpers */
17
sun6i_csi_bridge_dimensions(struct sun6i_csi_device * csi_dev,unsigned int * width,unsigned int * height)18 void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev,
19 unsigned int *width, unsigned int *height)
20 {
21 if (width)
22 *width = csi_dev->bridge.mbus_format.width;
23 if (height)
24 *height = csi_dev->bridge.mbus_format.height;
25 }
26
sun6i_csi_bridge_format(struct sun6i_csi_device * csi_dev,u32 * mbus_code,u32 * field)27 void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev,
28 u32 *mbus_code, u32 *field)
29 {
30 if (mbus_code)
31 *mbus_code = csi_dev->bridge.mbus_format.code;
32 if (field)
33 *field = csi_dev->bridge.mbus_format.field;
34 }
35
36 /* Format */
37
38 static const struct sun6i_csi_bridge_format sun6i_csi_bridge_formats[] = {
39 /* Bayer */
40 {
41 .mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
42 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
43 },
44 {
45 .mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
46 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
47 },
48 {
49 .mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
50 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
51 },
52 {
53 .mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
54 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
55 },
56 {
57 .mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
58 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
59 },
60 {
61 .mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
62 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
63 },
64 {
65 .mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
66 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
67 },
68 {
69 .mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
70 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
71 },
72 {
73 .mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
74 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
75 },
76 {
77 .mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
78 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
79 },
80 {
81 .mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
82 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
83 },
84 {
85 .mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
86 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
87 },
88 /* RGB */
89 {
90 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
91 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
92 },
93 {
94 .mbus_code = MEDIA_BUS_FMT_RGB565_2X8_BE,
95 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
96 },
97 /* YUV422 */
98 {
99 .mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
100 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
101 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
102 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
103 },
104 {
105 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
106 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
107 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
108 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
109 },
110 {
111 .mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
112 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
113 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
114 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
115 },
116 {
117 .mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
118 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
119 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
120 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
121 },
122 {
123 .mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
124 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
125 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
126 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
127 },
128 {
129 .mbus_code = MEDIA_BUS_FMT_YUYV8_1X16,
130 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
131 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
132 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
133 },
134 {
135 .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
136 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
137 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
138 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
139 },
140 {
141 .mbus_code = MEDIA_BUS_FMT_YVYU8_1X16,
142 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
143 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
144 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
145 },
146 {
147 .mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
148 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
149 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
150 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
151 },
152 {
153 .mbus_code = MEDIA_BUS_FMT_VYUY8_1X16,
154 .input_format = SUN6I_CSI_INPUT_FMT_YUV422,
155 .input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
156 .input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
157 },
158 /* Compressed */
159 {
160 .mbus_code = MEDIA_BUS_FMT_JPEG_1X8,
161 .input_format = SUN6I_CSI_INPUT_FMT_RAW,
162 },
163 };
164
165 const struct sun6i_csi_bridge_format *
sun6i_csi_bridge_format_find(u32 mbus_code)166 sun6i_csi_bridge_format_find(u32 mbus_code)
167 {
168 unsigned int i;
169
170 for (i = 0; i < ARRAY_SIZE(sun6i_csi_bridge_formats); i++)
171 if (sun6i_csi_bridge_formats[i].mbus_code == mbus_code)
172 return &sun6i_csi_bridge_formats[i];
173
174 return NULL;
175 }
176
177 /* Bridge */
178
sun6i_csi_bridge_irq_enable(struct sun6i_csi_device * csi_dev)179 static void sun6i_csi_bridge_irq_enable(struct sun6i_csi_device *csi_dev)
180 {
181 struct regmap *regmap = csi_dev->regmap;
182
183 regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG,
184 SUN6I_CSI_CH_INT_EN_VS |
185 SUN6I_CSI_CH_INT_EN_HB_OF |
186 SUN6I_CSI_CH_INT_EN_FIFO2_OF |
187 SUN6I_CSI_CH_INT_EN_FIFO1_OF |
188 SUN6I_CSI_CH_INT_EN_FIFO0_OF |
189 SUN6I_CSI_CH_INT_EN_FD |
190 SUN6I_CSI_CH_INT_EN_CD);
191 }
192
sun6i_csi_bridge_irq_disable(struct sun6i_csi_device * csi_dev)193 static void sun6i_csi_bridge_irq_disable(struct sun6i_csi_device *csi_dev)
194 {
195 struct regmap *regmap = csi_dev->regmap;
196
197 regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG, 0);
198 }
199
sun6i_csi_bridge_irq_clear(struct sun6i_csi_device * csi_dev)200 static void sun6i_csi_bridge_irq_clear(struct sun6i_csi_device *csi_dev)
201 {
202 struct regmap *regmap = csi_dev->regmap;
203
204 regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG, 0);
205 regmap_write(regmap, SUN6I_CSI_CH_INT_STA_REG,
206 SUN6I_CSI_CH_INT_STA_CLEAR);
207 }
208
sun6i_csi_bridge_enable(struct sun6i_csi_device * csi_dev)209 static void sun6i_csi_bridge_enable(struct sun6i_csi_device *csi_dev)
210 {
211 struct regmap *regmap = csi_dev->regmap;
212
213 regmap_update_bits(regmap, SUN6I_CSI_EN_REG, SUN6I_CSI_EN_CSI_EN,
214 SUN6I_CSI_EN_CSI_EN);
215
216 regmap_update_bits(regmap, SUN6I_CSI_CAP_REG, SUN6I_CSI_CAP_VCAP_ON,
217 SUN6I_CSI_CAP_VCAP_ON);
218 }
219
sun6i_csi_bridge_disable(struct sun6i_csi_device * csi_dev)220 static void sun6i_csi_bridge_disable(struct sun6i_csi_device *csi_dev)
221 {
222 struct regmap *regmap = csi_dev->regmap;
223
224 regmap_update_bits(regmap, SUN6I_CSI_CAP_REG, SUN6I_CSI_CAP_VCAP_ON, 0);
225 regmap_update_bits(regmap, SUN6I_CSI_EN_REG, SUN6I_CSI_EN_CSI_EN, 0);
226 }
227
228 static void
sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device * csi_dev)229 sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev)
230 {
231 struct device *dev = csi_dev->dev;
232 struct regmap *regmap = csi_dev->regmap;
233 struct v4l2_fwnode_endpoint *endpoint =
234 &csi_dev->bridge.source_parallel.endpoint;
235 unsigned char bus_width = endpoint->bus.parallel.bus_width;
236 unsigned int flags = endpoint->bus.parallel.flags;
237 u32 field;
238 u32 value = SUN6I_CSI_IF_CFG_IF_CSI;
239
240 sun6i_csi_bridge_format(csi_dev, NULL, &field);
241
242 if (field == V4L2_FIELD_INTERLACED ||
243 field == V4L2_FIELD_INTERLACED_TB ||
244 field == V4L2_FIELD_INTERLACED_BT)
245 value |= SUN6I_CSI_IF_CFG_SRC_TYPE_INTERLACED |
246 SUN6I_CSI_IF_CFG_FIELD_DT_PCLK_SHIFT(1) |
247 SUN6I_CSI_IF_CFG_FIELD_DT_FIELD_VSYNC;
248 else
249 value |= SUN6I_CSI_IF_CFG_SRC_TYPE_PROGRESSIVE;
250
251 switch (endpoint->bus_type) {
252 case V4L2_MBUS_PARALLEL:
253 if (bus_width == 16)
254 value |= SUN6I_CSI_IF_CFG_IF_CSI_YUV_COMBINED;
255 else
256 value |= SUN6I_CSI_IF_CFG_IF_CSI_YUV_RAW;
257
258 if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
259 value |= SUN6I_CSI_IF_CFG_FIELD_NEGATIVE;
260 else
261 value |= SUN6I_CSI_IF_CFG_FIELD_POSITIVE;
262
263 if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
264 value |= SUN6I_CSI_IF_CFG_VREF_POL_NEGATIVE;
265 else
266 value |= SUN6I_CSI_IF_CFG_VREF_POL_POSITIVE;
267
268 if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
269 value |= SUN6I_CSI_IF_CFG_HREF_POL_NEGATIVE;
270 else
271 value |= SUN6I_CSI_IF_CFG_HREF_POL_POSITIVE;
272
273 if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
274 value |= SUN6I_CSI_IF_CFG_CLK_POL_RISING;
275 else
276 value |= SUN6I_CSI_IF_CFG_CLK_POL_FALLING;
277 break;
278 case V4L2_MBUS_BT656:
279 if (bus_width == 16)
280 value |= SUN6I_CSI_IF_CFG_IF_CSI_BT1120;
281 else
282 value |= SUN6I_CSI_IF_CFG_IF_CSI_BT656;
283
284 if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
285 value |= SUN6I_CSI_IF_CFG_FIELD_NEGATIVE;
286 else
287 value |= SUN6I_CSI_IF_CFG_FIELD_POSITIVE;
288
289 if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
290 value |= SUN6I_CSI_IF_CFG_CLK_POL_RISING;
291 else
292 value |= SUN6I_CSI_IF_CFG_CLK_POL_FALLING;
293 break;
294 default:
295 dev_warn(dev, "unsupported bus type: %d\n", endpoint->bus_type);
296 break;
297 }
298
299 switch (bus_width) {
300 case 8:
301 /* 16-bit YUV formats use a doubled width in 8-bit mode. */
302 case 16:
303 value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_8;
304 break;
305 case 10:
306 value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_10;
307 break;
308 case 12:
309 value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_12;
310 break;
311 default:
312 dev_warn(dev, "unsupported bus width: %u\n", bus_width);
313 break;
314 }
315
316 regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value);
317 }
318
319 static void
sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device * csi_dev)320 sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device *csi_dev)
321 {
322 struct regmap *regmap = csi_dev->regmap;
323 u32 value = SUN6I_CSI_IF_CFG_IF_MIPI;
324 u32 field;
325
326 sun6i_csi_bridge_format(csi_dev, NULL, &field);
327
328 if (field == V4L2_FIELD_INTERLACED ||
329 field == V4L2_FIELD_INTERLACED_TB ||
330 field == V4L2_FIELD_INTERLACED_BT)
331 value |= SUN6I_CSI_IF_CFG_SRC_TYPE_INTERLACED;
332 else
333 value |= SUN6I_CSI_IF_CFG_SRC_TYPE_PROGRESSIVE;
334
335 regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value);
336 }
337
sun6i_csi_bridge_configure_format(struct sun6i_csi_device * csi_dev)338 static void sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev)
339 {
340 struct regmap *regmap = csi_dev->regmap;
341 bool capture_streaming = csi_dev->capture.state.streaming;
342 const struct sun6i_csi_bridge_format *bridge_format;
343 const struct sun6i_csi_capture_format *capture_format;
344 u32 mbus_code, field, pixelformat;
345 u8 input_format, input_yuv_seq, output_format;
346 u32 value = 0;
347
348 sun6i_csi_bridge_format(csi_dev, &mbus_code, &field);
349
350 bridge_format = sun6i_csi_bridge_format_find(mbus_code);
351 if (WARN_ON(!bridge_format))
352 return;
353
354 input_format = bridge_format->input_format;
355 input_yuv_seq = bridge_format->input_yuv_seq;
356
357 if (capture_streaming) {
358 sun6i_csi_capture_format(csi_dev, &pixelformat, NULL);
359
360 capture_format = sun6i_csi_capture_format_find(pixelformat);
361 if (WARN_ON(!capture_format))
362 return;
363
364 if (capture_format->input_format_raw)
365 input_format = SUN6I_CSI_INPUT_FMT_RAW;
366
367 if (capture_format->input_yuv_seq_invert)
368 input_yuv_seq = bridge_format->input_yuv_seq_invert;
369
370 if (field == V4L2_FIELD_INTERLACED ||
371 field == V4L2_FIELD_INTERLACED_TB ||
372 field == V4L2_FIELD_INTERLACED_BT)
373 output_format = capture_format->output_format_field;
374 else
375 output_format = capture_format->output_format_frame;
376
377 value |= SUN6I_CSI_CH_CFG_OUTPUT_FMT(output_format);
378 }
379
380 value |= SUN6I_CSI_CH_CFG_INPUT_FMT(input_format);
381 value |= SUN6I_CSI_CH_CFG_INPUT_YUV_SEQ(input_yuv_seq);
382
383 if (field == V4L2_FIELD_TOP)
384 value |= SUN6I_CSI_CH_CFG_FIELD_SEL_FIELD0;
385 else if (field == V4L2_FIELD_BOTTOM)
386 value |= SUN6I_CSI_CH_CFG_FIELD_SEL_FIELD1;
387 else
388 value |= SUN6I_CSI_CH_CFG_FIELD_SEL_EITHER;
389
390 regmap_write(regmap, SUN6I_CSI_CH_CFG_REG, value);
391 }
392
sun6i_csi_bridge_configure(struct sun6i_csi_device * csi_dev,struct sun6i_csi_bridge_source * source)393 static void sun6i_csi_bridge_configure(struct sun6i_csi_device *csi_dev,
394 struct sun6i_csi_bridge_source *source)
395 {
396 struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
397
398 if (source == &bridge->source_parallel)
399 sun6i_csi_bridge_configure_parallel(csi_dev);
400 else
401 sun6i_csi_bridge_configure_mipi_csi2(csi_dev);
402
403 sun6i_csi_bridge_configure_format(csi_dev);
404 }
405
406 /* V4L2 Subdev */
407
sun6i_csi_bridge_s_stream(struct v4l2_subdev * subdev,int on)408 static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on)
409 {
410 struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
411 struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
412 struct media_pad *local_pad = &bridge->pads[SUN6I_CSI_BRIDGE_PAD_SINK];
413 bool capture_streaming = csi_dev->capture.state.streaming;
414 struct device *dev = csi_dev->dev;
415 struct sun6i_csi_bridge_source *source;
416 struct v4l2_subdev *source_subdev;
417 struct media_pad *remote_pad;
418 int ret;
419
420 /* Source */
421
422 remote_pad = media_pad_remote_pad_unique(local_pad);
423 if (IS_ERR(remote_pad)) {
424 dev_err(dev,
425 "zero or more than a single source connected to the bridge\n");
426 return PTR_ERR(remote_pad);
427 }
428
429 source_subdev = media_entity_to_v4l2_subdev(remote_pad->entity);
430
431 if (source_subdev == bridge->source_parallel.subdev)
432 source = &bridge->source_parallel;
433 else
434 source = &bridge->source_mipi_csi2;
435
436 if (!on) {
437 v4l2_subdev_call(source_subdev, video, s_stream, 0);
438 ret = 0;
439 goto disable;
440 }
441
442 /* PM */
443
444 ret = pm_runtime_resume_and_get(dev);
445 if (ret < 0)
446 return ret;
447
448 /* Clear */
449
450 sun6i_csi_bridge_irq_clear(csi_dev);
451
452 /* Configure */
453
454 sun6i_csi_bridge_configure(csi_dev, source);
455
456 if (capture_streaming)
457 sun6i_csi_capture_configure(csi_dev);
458
459 /* State Update */
460
461 if (capture_streaming)
462 sun6i_csi_capture_state_update(csi_dev);
463
464 /* Enable */
465
466 if (capture_streaming)
467 sun6i_csi_bridge_irq_enable(csi_dev);
468
469 sun6i_csi_bridge_enable(csi_dev);
470
471 ret = v4l2_subdev_call(source_subdev, video, s_stream, 1);
472 if (ret && ret != -ENOIOCTLCMD)
473 goto disable;
474
475 return 0;
476
477 disable:
478 if (capture_streaming)
479 sun6i_csi_bridge_irq_disable(csi_dev);
480
481 sun6i_csi_bridge_disable(csi_dev);
482
483 pm_runtime_put(dev);
484
485 return ret;
486 }
487
488 static const struct v4l2_subdev_video_ops sun6i_csi_bridge_video_ops = {
489 .s_stream = sun6i_csi_bridge_s_stream,
490 };
491
492 static void
sun6i_csi_bridge_mbus_format_prepare(struct v4l2_mbus_framefmt * mbus_format)493 sun6i_csi_bridge_mbus_format_prepare(struct v4l2_mbus_framefmt *mbus_format)
494 {
495 if (!sun6i_csi_bridge_format_find(mbus_format->code))
496 mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code;
497
498 mbus_format->field = V4L2_FIELD_NONE;
499 mbus_format->colorspace = V4L2_COLORSPACE_RAW;
500 mbus_format->quantization = V4L2_QUANTIZATION_DEFAULT;
501 mbus_format->xfer_func = V4L2_XFER_FUNC_DEFAULT;
502 }
503
sun6i_csi_bridge_init_cfg(struct v4l2_subdev * subdev,struct v4l2_subdev_state * state)504 static int sun6i_csi_bridge_init_cfg(struct v4l2_subdev *subdev,
505 struct v4l2_subdev_state *state)
506 {
507 struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
508 unsigned int pad = SUN6I_CSI_BRIDGE_PAD_SINK;
509 struct v4l2_mbus_framefmt *mbus_format =
510 v4l2_subdev_get_try_format(subdev, state, pad);
511 struct mutex *lock = &csi_dev->bridge.lock;
512
513 mutex_lock(lock);
514
515 mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code;
516 mbus_format->width = 1280;
517 mbus_format->height = 720;
518
519 sun6i_csi_bridge_mbus_format_prepare(mbus_format);
520
521 mutex_unlock(lock);
522
523 return 0;
524 }
525
526 static int
sun6i_csi_bridge_enum_mbus_code(struct v4l2_subdev * subdev,struct v4l2_subdev_state * state,struct v4l2_subdev_mbus_code_enum * code_enum)527 sun6i_csi_bridge_enum_mbus_code(struct v4l2_subdev *subdev,
528 struct v4l2_subdev_state *state,
529 struct v4l2_subdev_mbus_code_enum *code_enum)
530 {
531 if (code_enum->index >= ARRAY_SIZE(sun6i_csi_bridge_formats))
532 return -EINVAL;
533
534 code_enum->code = sun6i_csi_bridge_formats[code_enum->index].mbus_code;
535
536 return 0;
537 }
538
sun6i_csi_bridge_get_fmt(struct v4l2_subdev * subdev,struct v4l2_subdev_state * state,struct v4l2_subdev_format * format)539 static int sun6i_csi_bridge_get_fmt(struct v4l2_subdev *subdev,
540 struct v4l2_subdev_state *state,
541 struct v4l2_subdev_format *format)
542 {
543 struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
544 struct v4l2_mbus_framefmt *mbus_format = &format->format;
545 struct mutex *lock = &csi_dev->bridge.lock;
546
547 mutex_lock(lock);
548
549 if (format->which == V4L2_SUBDEV_FORMAT_TRY)
550 *mbus_format = *v4l2_subdev_get_try_format(subdev, state,
551 format->pad);
552 else
553 *mbus_format = csi_dev->bridge.mbus_format;
554
555 mutex_unlock(lock);
556
557 return 0;
558 }
559
sun6i_csi_bridge_set_fmt(struct v4l2_subdev * subdev,struct v4l2_subdev_state * state,struct v4l2_subdev_format * format)560 static int sun6i_csi_bridge_set_fmt(struct v4l2_subdev *subdev,
561 struct v4l2_subdev_state *state,
562 struct v4l2_subdev_format *format)
563 {
564 struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
565 struct v4l2_mbus_framefmt *mbus_format = &format->format;
566 struct mutex *lock = &csi_dev->bridge.lock;
567
568 mutex_lock(lock);
569
570 sun6i_csi_bridge_mbus_format_prepare(mbus_format);
571
572 if (format->which == V4L2_SUBDEV_FORMAT_TRY)
573 *v4l2_subdev_get_try_format(subdev, state, format->pad) =
574 *mbus_format;
575 else
576 csi_dev->bridge.mbus_format = *mbus_format;
577
578 mutex_unlock(lock);
579
580 return 0;
581 }
582
583 static const struct v4l2_subdev_pad_ops sun6i_csi_bridge_pad_ops = {
584 .init_cfg = sun6i_csi_bridge_init_cfg,
585 .enum_mbus_code = sun6i_csi_bridge_enum_mbus_code,
586 .get_fmt = sun6i_csi_bridge_get_fmt,
587 .set_fmt = sun6i_csi_bridge_set_fmt,
588 };
589
590 static const struct v4l2_subdev_ops sun6i_csi_bridge_subdev_ops = {
591 .video = &sun6i_csi_bridge_video_ops,
592 .pad = &sun6i_csi_bridge_pad_ops,
593 };
594
595 /* Media Entity */
596
597 static const struct media_entity_operations sun6i_csi_bridge_entity_ops = {
598 .link_validate = v4l2_subdev_link_validate,
599 };
600
601 /* V4L2 Async */
602
sun6i_csi_bridge_link(struct sun6i_csi_device * csi_dev,int sink_pad_index,struct v4l2_subdev * remote_subdev,bool enabled)603 static int sun6i_csi_bridge_link(struct sun6i_csi_device *csi_dev,
604 int sink_pad_index,
605 struct v4l2_subdev *remote_subdev,
606 bool enabled)
607 {
608 struct device *dev = csi_dev->dev;
609 struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
610 struct media_entity *sink_entity = &subdev->entity;
611 struct media_entity *source_entity = &remote_subdev->entity;
612 int source_pad_index;
613 int ret;
614
615 /* Get the first remote source pad. */
616 ret = media_entity_get_fwnode_pad(source_entity, remote_subdev->fwnode,
617 MEDIA_PAD_FL_SOURCE);
618 if (ret < 0) {
619 dev_err(dev, "missing source pad in external entity %s\n",
620 source_entity->name);
621 return -EINVAL;
622 }
623
624 source_pad_index = ret;
625
626 dev_dbg(dev, "creating %s:%u -> %s:%u link\n", source_entity->name,
627 source_pad_index, sink_entity->name, sink_pad_index);
628
629 ret = media_create_pad_link(source_entity, source_pad_index,
630 sink_entity, sink_pad_index,
631 enabled ? MEDIA_LNK_FL_ENABLED : 0);
632 if (ret < 0) {
633 dev_err(dev, "failed to create %s:%u -> %s:%u link\n",
634 source_entity->name, source_pad_index,
635 sink_entity->name, sink_pad_index);
636 return ret;
637 }
638
639 return 0;
640 }
641
642 static int
sun6i_csi_bridge_notifier_bound(struct v4l2_async_notifier * notifier,struct v4l2_subdev * remote_subdev,struct v4l2_async_connection * async_subdev)643 sun6i_csi_bridge_notifier_bound(struct v4l2_async_notifier *notifier,
644 struct v4l2_subdev *remote_subdev,
645 struct v4l2_async_connection *async_subdev)
646 {
647 struct sun6i_csi_device *csi_dev =
648 container_of(notifier, struct sun6i_csi_device,
649 bridge.notifier);
650 struct sun6i_csi_bridge_async_subdev *bridge_async_subdev =
651 container_of(async_subdev, struct sun6i_csi_bridge_async_subdev,
652 async_subdev);
653 struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
654 struct sun6i_csi_bridge_source *source = bridge_async_subdev->source;
655 bool enabled = false;
656 int ret;
657
658 switch (source->endpoint.base.port) {
659 case SUN6I_CSI_PORT_PARALLEL:
660 enabled = true;
661 break;
662 case SUN6I_CSI_PORT_MIPI_CSI2:
663 enabled = !bridge->source_parallel.expected;
664 break;
665 default:
666 return -EINVAL;
667 }
668
669 source->subdev = remote_subdev;
670
671 if (csi_dev->isp_available) {
672 /*
673 * Hook to the first available remote subdev to get v4l2 and
674 * media devices and register the capture device then.
675 */
676 ret = sun6i_csi_isp_complete(csi_dev, remote_subdev->v4l2_dev);
677 if (ret)
678 return ret;
679 }
680
681 return sun6i_csi_bridge_link(csi_dev, SUN6I_CSI_BRIDGE_PAD_SINK,
682 remote_subdev, enabled);
683 }
684
685 static int
sun6i_csi_bridge_notifier_complete(struct v4l2_async_notifier * notifier)686 sun6i_csi_bridge_notifier_complete(struct v4l2_async_notifier *notifier)
687 {
688 struct sun6i_csi_device *csi_dev =
689 container_of(notifier, struct sun6i_csi_device,
690 bridge.notifier);
691 struct v4l2_device *v4l2_dev = &csi_dev->v4l2.v4l2_dev;
692
693 if (csi_dev->isp_available)
694 return 0;
695
696 return v4l2_device_register_subdev_nodes(v4l2_dev);
697 }
698
699 static const struct v4l2_async_notifier_operations
700 sun6i_csi_bridge_notifier_ops = {
701 .bound = sun6i_csi_bridge_notifier_bound,
702 .complete = sun6i_csi_bridge_notifier_complete,
703 };
704
705 /* Bridge */
706
sun6i_csi_bridge_source_setup(struct sun6i_csi_device * csi_dev,struct sun6i_csi_bridge_source * source,u32 port,enum v4l2_mbus_type * bus_types)707 static int sun6i_csi_bridge_source_setup(struct sun6i_csi_device *csi_dev,
708 struct sun6i_csi_bridge_source *source,
709 u32 port,
710 enum v4l2_mbus_type *bus_types)
711 {
712 struct device *dev = csi_dev->dev;
713 struct v4l2_async_notifier *notifier = &csi_dev->bridge.notifier;
714 struct v4l2_fwnode_endpoint *endpoint = &source->endpoint;
715 struct sun6i_csi_bridge_async_subdev *bridge_async_subdev;
716 struct fwnode_handle *handle;
717 int ret;
718
719 handle = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), port, 0, 0);
720 if (!handle)
721 return -ENODEV;
722
723 ret = v4l2_fwnode_endpoint_parse(handle, endpoint);
724 if (ret)
725 goto complete;
726
727 if (bus_types) {
728 bool valid = false;
729 unsigned int i;
730
731 for (i = 0; bus_types[i] != V4L2_MBUS_INVALID; i++) {
732 if (endpoint->bus_type == bus_types[i]) {
733 valid = true;
734 break;
735 }
736 }
737
738 if (!valid) {
739 dev_err(dev, "unsupported bus type for port %d\n",
740 port);
741 ret = -EINVAL;
742 goto complete;
743 }
744 }
745
746 bridge_async_subdev =
747 v4l2_async_nf_add_fwnode_remote(notifier, handle,
748 struct
749 sun6i_csi_bridge_async_subdev);
750 if (IS_ERR(bridge_async_subdev)) {
751 ret = PTR_ERR(bridge_async_subdev);
752 goto complete;
753 }
754
755 bridge_async_subdev->source = source;
756
757 source->expected = true;
758
759 complete:
760 fwnode_handle_put(handle);
761
762 return ret;
763 }
764
sun6i_csi_bridge_setup(struct sun6i_csi_device * csi_dev)765 int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev)
766 {
767 struct device *dev = csi_dev->dev;
768 struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
769 struct v4l2_device *v4l2_dev = csi_dev->v4l2_dev;
770 struct v4l2_subdev *subdev = &bridge->subdev;
771 struct v4l2_async_notifier *notifier = &bridge->notifier;
772 struct media_pad *pads = bridge->pads;
773 enum v4l2_mbus_type parallel_mbus_types[] = {
774 V4L2_MBUS_PARALLEL,
775 V4L2_MBUS_BT656,
776 V4L2_MBUS_INVALID
777 };
778 int ret;
779
780 mutex_init(&bridge->lock);
781
782 /* V4L2 Subdev */
783
784 v4l2_subdev_init(subdev, &sun6i_csi_bridge_subdev_ops);
785 strscpy(subdev->name, SUN6I_CSI_BRIDGE_NAME, sizeof(subdev->name));
786 subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
787 subdev->owner = THIS_MODULE;
788 subdev->dev = dev;
789
790 v4l2_set_subdevdata(subdev, csi_dev);
791
792 /* Media Entity */
793
794 subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
795 subdev->entity.ops = &sun6i_csi_bridge_entity_ops;
796
797 /* Media Pads */
798
799 pads[SUN6I_CSI_BRIDGE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
800 pads[SUN6I_CSI_BRIDGE_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE |
801 MEDIA_PAD_FL_MUST_CONNECT;
802
803 ret = media_entity_pads_init(&subdev->entity,
804 SUN6I_CSI_BRIDGE_PAD_COUNT, pads);
805 if (ret < 0)
806 return ret;
807
808 /* V4L2 Subdev */
809
810 if (csi_dev->isp_available)
811 ret = v4l2_async_register_subdev(subdev);
812 else
813 ret = v4l2_device_register_subdev(v4l2_dev, subdev);
814
815 if (ret) {
816 dev_err(dev, "failed to register v4l2 subdev: %d\n", ret);
817 goto error_media_entity;
818 }
819
820 /* V4L2 Async */
821
822 if (csi_dev->isp_available)
823 v4l2_async_subdev_nf_init(notifier, subdev);
824 else
825 v4l2_async_nf_init(notifier, v4l2_dev);
826 notifier->ops = &sun6i_csi_bridge_notifier_ops;
827
828 sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_parallel,
829 SUN6I_CSI_PORT_PARALLEL,
830 parallel_mbus_types);
831 sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_mipi_csi2,
832 SUN6I_CSI_PORT_MIPI_CSI2, NULL);
833
834 ret = v4l2_async_nf_register(notifier);
835 if (ret) {
836 dev_err(dev, "failed to register v4l2 async notifier: %d\n",
837 ret);
838 goto error_v4l2_async_notifier;
839 }
840
841 return 0;
842
843 error_v4l2_async_notifier:
844 v4l2_async_nf_cleanup(notifier);
845
846 if (csi_dev->isp_available)
847 v4l2_async_unregister_subdev(subdev);
848 else
849 v4l2_device_unregister_subdev(subdev);
850
851 error_media_entity:
852 media_entity_cleanup(&subdev->entity);
853
854 return ret;
855 }
856
sun6i_csi_bridge_cleanup(struct sun6i_csi_device * csi_dev)857 void sun6i_csi_bridge_cleanup(struct sun6i_csi_device *csi_dev)
858 {
859 struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
860 struct v4l2_async_notifier *notifier = &csi_dev->bridge.notifier;
861
862 v4l2_async_nf_unregister(notifier);
863 v4l2_async_nf_cleanup(notifier);
864
865 v4l2_device_unregister_subdev(subdev);
866
867 media_entity_cleanup(&subdev->entity);
868 }
869