1// SPDX-License-Identifier: GPL-2.0+
2/*
3 * TI OMAP4 ISS V4L2 Driver - ISP IPIPEIF module
4 *
5 * Copyright (C) 2012 Texas Instruments, Inc.
6 *
7 * Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
8 */
9
10#include <linux/module.h>
11#include <linux/uaccess.h>
12#include <linux/delay.h>
13#include <linux/device.h>
14#include <linux/dma-mapping.h>
15#include <linux/mm.h>
16#include <linux/sched.h>
17
18#include "iss.h"
19#include "iss_regs.h"
20#include "iss_ipipeif.h"
21
22static const unsigned int ipipeif_fmts[] = {
23 MEDIA_BUS_FMT_SGRBG10_1X10,
24 MEDIA_BUS_FMT_SRGGB10_1X10,
25 MEDIA_BUS_FMT_SBGGR10_1X10,
26 MEDIA_BUS_FMT_SGBRG10_1X10,
27 MEDIA_BUS_FMT_UYVY8_1X16,
28 MEDIA_BUS_FMT_YUYV8_1X16,
29};
30
31/*
32 * ipipeif_print_status - Print current IPIPEIF Module register values.
33 * @ipipeif: Pointer to ISS ISP IPIPEIF device.
34 *
35 * Also prints other debug information stored in the IPIPEIF module.
36 */
37#define IPIPEIF_PRINT_REGISTER(iss, name)\
38 dev_dbg(iss->dev, "###IPIPEIF " #name "=0x%08x\n", \
39 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_##name))
40
41#define ISIF_PRINT_REGISTER(iss, name)\
42 dev_dbg(iss->dev, "###ISIF " #name "=0x%08x\n", \
43 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_##name))
44
45#define ISP5_PRINT_REGISTER(iss, name)\
46 dev_dbg(iss->dev, "###ISP5 " #name "=0x%08x\n", \
47 iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_##name))
48
49static void ipipeif_print_status(struct iss_ipipeif_device *ipipeif)
50{
51 struct iss_device *iss = to_iss_device(ipipeif);
52
53 dev_dbg(iss->dev, "-------------IPIPEIF Register dump-------------\n");
54
55 IPIPEIF_PRINT_REGISTER(iss, CFG1);
56 IPIPEIF_PRINT_REGISTER(iss, CFG2);
57
58 ISIF_PRINT_REGISTER(iss, SYNCEN);
59 ISIF_PRINT_REGISTER(iss, CADU);
60 ISIF_PRINT_REGISTER(iss, CADL);
61 ISIF_PRINT_REGISTER(iss, MODESET);
62 ISIF_PRINT_REGISTER(iss, CCOLP);
63 ISIF_PRINT_REGISTER(iss, SPH);
64 ISIF_PRINT_REGISTER(iss, LNH);
65 ISIF_PRINT_REGISTER(iss, LNV);
66 ISIF_PRINT_REGISTER(iss, VDINT(0));
67 ISIF_PRINT_REGISTER(iss, HSIZE);
68
69 ISP5_PRINT_REGISTER(iss, SYSCONFIG);
70 ISP5_PRINT_REGISTER(iss, CTRL);
71 ISP5_PRINT_REGISTER(iss, IRQSTATUS(0));
72 ISP5_PRINT_REGISTER(iss, IRQENABLE_SET(0));
73 ISP5_PRINT_REGISTER(iss, IRQENABLE_CLR(0));
74
75 dev_dbg(iss->dev, "-----------------------------------------------\n");
76}
77
78static void ipipeif_write_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
79{
80 struct iss_device *iss = to_iss_device(ipipeif);
81
82 iss_reg_update(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_SYNCEN,
83 ISIF_SYNCEN_DWEN, set: enable ? ISIF_SYNCEN_DWEN : 0);
84}
85
86/*
87 * ipipeif_enable - Enable/Disable IPIPEIF.
88 * @enable: enable flag
89 *
90 */
91static void ipipeif_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
92{
93 struct iss_device *iss = to_iss_device(ipipeif);
94
95 iss_reg_update(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_SYNCEN,
96 ISIF_SYNCEN_SYEN, set: enable ? ISIF_SYNCEN_SYEN : 0);
97}
98
99/* -----------------------------------------------------------------------------
100 * Format- and pipeline-related configuration helpers
101 */
102
103/*
104 * ipipeif_set_outaddr - Set memory address to save output image
105 * @ipipeif: Pointer to ISP IPIPEIF device.
106 * @addr: 32-bit memory address aligned on 32 byte boundary.
107 *
108 * Sets the memory address where the output will be saved.
109 */
110static void ipipeif_set_outaddr(struct iss_ipipeif_device *ipipeif, u32 addr)
111{
112 struct iss_device *iss = to_iss_device(ipipeif);
113
114 /* Save address split in Base Address H & L */
115 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_CADU,
116 value: (addr >> (16 + 5)) & ISIF_CADU_MASK);
117 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_CADL,
118 value: (addr >> 5) & ISIF_CADL_MASK);
119}
120
121static void ipipeif_configure(struct iss_ipipeif_device *ipipeif)
122{
123 struct iss_device *iss = to_iss_device(ipipeif);
124 const struct iss_format_info *info;
125 struct v4l2_mbus_framefmt *format;
126 u32 isif_ccolp = 0;
127
128 omap4iss_configure_bridge(iss, input: ipipeif->input);
129
130 /* IPIPEIF_PAD_SINK */
131 format = &ipipeif->formats[IPIPEIF_PAD_SINK];
132
133 /* IPIPEIF with YUV422 input from ISIF */
134 iss_reg_clr(iss, res: OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG1,
135 IPIPEIF_CFG1_INPSRC1_MASK | IPIPEIF_CFG1_INPSRC2_MASK);
136
137 /* Select ISIF/IPIPEIF input format */
138 switch (format->code) {
139 case MEDIA_BUS_FMT_UYVY8_1X16:
140 case MEDIA_BUS_FMT_YUYV8_1X16:
141 iss_reg_update(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
142 ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
143 ISIF_MODESET_CCDW_MASK,
144 ISIF_MODESET_INPMOD_YCBCR16);
145
146 iss_reg_update(iss, res: OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG2,
147 IPIPEIF_CFG2_YUV8, IPIPEIF_CFG2_YUV16);
148
149 break;
150 case MEDIA_BUS_FMT_SGRBG10_1X10:
151 isif_ccolp = ISIF_CCOLP_CP0_F0_GR |
152 ISIF_CCOLP_CP1_F0_R |
153 ISIF_CCOLP_CP2_F0_B |
154 ISIF_CCOLP_CP3_F0_GB;
155 goto cont_raw;
156 case MEDIA_BUS_FMT_SRGGB10_1X10:
157 isif_ccolp = ISIF_CCOLP_CP0_F0_R |
158 ISIF_CCOLP_CP1_F0_GR |
159 ISIF_CCOLP_CP2_F0_GB |
160 ISIF_CCOLP_CP3_F0_B;
161 goto cont_raw;
162 case MEDIA_BUS_FMT_SBGGR10_1X10:
163 isif_ccolp = ISIF_CCOLP_CP0_F0_B |
164 ISIF_CCOLP_CP1_F0_GB |
165 ISIF_CCOLP_CP2_F0_GR |
166 ISIF_CCOLP_CP3_F0_R;
167 goto cont_raw;
168 case MEDIA_BUS_FMT_SGBRG10_1X10:
169 isif_ccolp = ISIF_CCOLP_CP0_F0_GB |
170 ISIF_CCOLP_CP1_F0_B |
171 ISIF_CCOLP_CP2_F0_R |
172 ISIF_CCOLP_CP3_F0_GR;
173cont_raw:
174 iss_reg_clr(iss, res: OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG2,
175 IPIPEIF_CFG2_YUV16);
176
177 iss_reg_update(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
178 ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
179 ISIF_MODESET_CCDW_MASK, ISIF_MODESET_INPMOD_RAW |
180 ISIF_MODESET_CCDW_2BIT);
181
182 info = omap4iss_video_format_info(code: format->code);
183 iss_reg_update(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_CGAMMAWD,
184 ISIF_CGAMMAWD_GWDI_MASK,
185 ISIF_CGAMMAWD_GWDI(info->bpp));
186
187 /* Set RAW Bayer pattern */
188 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_CCOLP,
189 value: isif_ccolp);
190 break;
191 }
192
193 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_SPH, value: 0 & ISIF_SPH_MASK);
194 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_LNH,
195 value: (format->width - 1) & ISIF_LNH_MASK);
196 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_LNV,
197 value: (format->height - 1) & ISIF_LNV_MASK);
198
199 /* Generate ISIF0 on the last line of the image */
200 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_VDINT(0),
201 value: format->height - 1);
202
203 /* IPIPEIF_PAD_SOURCE_ISIF_SF */
204 format = &ipipeif->formats[IPIPEIF_PAD_SOURCE_ISIF_SF];
205
206 iss_reg_write(iss, res: OMAP4_ISS_MEM_ISP_ISIF, ISIF_HSIZE,
207 value: (ipipeif->video_out.bpl_value >> 5) &
208 ISIF_HSIZE_HSIZE_MASK);
209
210 /* IPIPEIF_PAD_SOURCE_VP */
211 /* Do nothing? */
212}
213
214/* -----------------------------------------------------------------------------
215 * Interrupt handling
216 */
217
218static void ipipeif_isr_buffer(struct iss_ipipeif_device *ipipeif)
219{
220 struct iss_buffer *buffer;
221
222 /* The ISIF generates VD0 interrupts even when writes are disabled.
223 * deal with it anyway). Disabling the ISIF when no buffer is available
224 * is thus not be enough, we need to handle the situation explicitly.
225 */
226 if (list_empty(head: &ipipeif->video_out.dmaqueue))
227 return;
228
229 ipipeif_write_enable(ipipeif, enable: 0);
230
231 buffer = omap4iss_video_buffer_next(video: &ipipeif->video_out);
232 if (!buffer)
233 return;
234
235 ipipeif_set_outaddr(ipipeif, addr: buffer->iss_addr);
236
237 ipipeif_write_enable(ipipeif, enable: 1);
238}
239
240/*
241 * omap4iss_ipipeif_isr - Configure ipipeif during interframe time.
242 * @ipipeif: Pointer to ISP IPIPEIF device.
243 * @events: IPIPEIF events
244 */
245void omap4iss_ipipeif_isr(struct iss_ipipeif_device *ipipeif, u32 events)
246{
247 if (omap4iss_module_sync_is_stopping(wait: &ipipeif->wait,
248 stopping: &ipipeif->stopping))
249 return;
250
251 if ((events & ISP5_IRQ_ISIF_INT(0)) &&
252 (ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
253 ipipeif_isr_buffer(ipipeif);
254}
255
256/* -----------------------------------------------------------------------------
257 * ISP video operations
258 */
259
260static int ipipeif_video_queue(struct iss_video *video,
261 struct iss_buffer *buffer)
262{
263 struct iss_ipipeif_device *ipipeif = container_of(video,
264 struct iss_ipipeif_device, video_out);
265
266 if (!(ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
267 return -ENODEV;
268
269 ipipeif_set_outaddr(ipipeif, addr: buffer->iss_addr);
270
271 /*
272 * If streaming was enabled before there was a buffer queued
273 * or underrun happened in the ISR, the hardware was not enabled
274 * and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
275 * Enable it now.
276 */
277 if (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
278 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
279 ipipeif_write_enable(ipipeif, enable: 1);
280 ipipeif_enable(ipipeif, enable: 1);
281 iss_video_dmaqueue_flags_clr(video);
282 }
283
284 return 0;
285}
286
287static const struct iss_video_operations ipipeif_video_ops = {
288 .queue = ipipeif_video_queue,
289};
290
291/* -----------------------------------------------------------------------------
292 * V4L2 subdev operations
293 */
294
295#define IPIPEIF_DRV_SUBCLK_MASK (OMAP4_ISS_ISP_SUBCLK_IPIPEIF |\
296 OMAP4_ISS_ISP_SUBCLK_ISIF)
297/*
298 * ipipeif_set_stream - Enable/Disable streaming on the IPIPEIF module
299 * @sd: ISP IPIPEIF V4L2 subdevice
300 * @enable: Enable/disable stream
301 */
302static int ipipeif_set_stream(struct v4l2_subdev *sd, int enable)
303{
304 struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
305 struct iss_device *iss = to_iss_device(ipipeif);
306 struct iss_video *video_out = &ipipeif->video_out;
307 int ret = 0;
308
309 if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED) {
310 if (enable == ISS_PIPELINE_STREAM_STOPPED)
311 return 0;
312
313 omap4iss_isp_subclk_enable(iss, IPIPEIF_DRV_SUBCLK_MASK);
314 }
315
316 switch (enable) {
317 case ISS_PIPELINE_STREAM_CONTINUOUS:
318
319 ipipeif_configure(ipipeif);
320 ipipeif_print_status(ipipeif);
321
322 /*
323 * When outputting to memory with no buffer available, let the
324 * buffer queue handler start the hardware. A DMA queue flag
325 * ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
326 * a buffer available.
327 */
328 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY &&
329 !(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
330 break;
331
332 atomic_set(v: &ipipeif->stopping, i: 0);
333 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
334 ipipeif_write_enable(ipipeif, enable: 1);
335 ipipeif_enable(ipipeif, enable: 1);
336 iss_video_dmaqueue_flags_clr(video_out);
337 break;
338
339 case ISS_PIPELINE_STREAM_STOPPED:
340 if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED)
341 return 0;
342 if (omap4iss_module_sync_idle(me: &sd->entity, wait: &ipipeif->wait,
343 stopping: &ipipeif->stopping))
344 ret = -ETIMEDOUT;
345
346 if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
347 ipipeif_write_enable(ipipeif, enable: 0);
348 ipipeif_enable(ipipeif, enable: 0);
349 omap4iss_isp_subclk_disable(iss, IPIPEIF_DRV_SUBCLK_MASK);
350 iss_video_dmaqueue_flags_clr(video_out);
351 break;
352 }
353
354 ipipeif->state = enable;
355 return ret;
356}
357
358static struct v4l2_mbus_framefmt *
359__ipipeif_get_format(struct iss_ipipeif_device *ipipeif,
360 struct v4l2_subdev_state *sd_state, unsigned int pad,
361 enum v4l2_subdev_format_whence which)
362{
363 if (which == V4L2_SUBDEV_FORMAT_TRY)
364 return v4l2_subdev_state_get_format(sd_state, pad);
365 return &ipipeif->formats[pad];
366}
367
368/*
369 * ipipeif_try_format - Try video format on a pad
370 * @ipipeif: ISS IPIPEIF device
371 * @sd_state: V4L2 subdev state
372 * @pad: Pad number
373 * @fmt: Format
374 */
375static void
376ipipeif_try_format(struct iss_ipipeif_device *ipipeif,
377 struct v4l2_subdev_state *sd_state, unsigned int pad,
378 struct v4l2_mbus_framefmt *fmt,
379 enum v4l2_subdev_format_whence which)
380{
381 struct v4l2_mbus_framefmt *format;
382 unsigned int width = fmt->width;
383 unsigned int height = fmt->height;
384 unsigned int i;
385
386 switch (pad) {
387 case IPIPEIF_PAD_SINK:
388 /* TODO: If the IPIPEIF output formatter pad is connected
389 * directly to the resizer, only YUV formats can be used.
390 */
391 for (i = 0; i < ARRAY_SIZE(ipipeif_fmts); i++) {
392 if (fmt->code == ipipeif_fmts[i])
393 break;
394 }
395
396 /* If not found, use SGRBG10 as default */
397 if (i >= ARRAY_SIZE(ipipeif_fmts))
398 fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
399
400 /* Clamp the input size. */
401 fmt->width = clamp_t(u32, width, 1, 8192);
402 fmt->height = clamp_t(u32, height, 1, 8192);
403 break;
404
405 case IPIPEIF_PAD_SOURCE_ISIF_SF:
406 format = __ipipeif_get_format(ipipeif, sd_state,
407 IPIPEIF_PAD_SINK,
408 which);
409 memcpy(fmt, format, sizeof(*fmt));
410
411 /* The data formatter truncates the number of horizontal output
412 * pixels to a multiple of 16. To avoid clipping data, allow
413 * callers to request an output size bigger than the input size
414 * up to the nearest multiple of 16.
415 */
416 fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15);
417 fmt->width &= ~15;
418 fmt->height = clamp_t(u32, height, 32, fmt->height);
419 break;
420
421 case IPIPEIF_PAD_SOURCE_VP:
422 format = __ipipeif_get_format(ipipeif, sd_state,
423 IPIPEIF_PAD_SINK,
424 which);
425 memcpy(fmt, format, sizeof(*fmt));
426
427 fmt->width = clamp_t(u32, width, 32, fmt->width);
428 fmt->height = clamp_t(u32, height, 32, fmt->height);
429 break;
430 }
431
432 /* Data is written to memory unpacked, each 10-bit or 12-bit pixel is
433 * stored on 2 bytes.
434 */
435 fmt->colorspace = V4L2_COLORSPACE_SRGB;
436 fmt->field = V4L2_FIELD_NONE;
437}
438
439/*
440 * ipipeif_enum_mbus_code - Handle pixel format enumeration
441 * @sd : pointer to v4l2 subdev structure
442 * @sd_state: V4L2 subdev state
443 * @code : pointer to v4l2_subdev_mbus_code_enum structure
444 * return -EINVAL or zero on success
445 */
446static int ipipeif_enum_mbus_code(struct v4l2_subdev *sd,
447 struct v4l2_subdev_state *sd_state,
448 struct v4l2_subdev_mbus_code_enum *code)
449{
450 struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
451 struct v4l2_mbus_framefmt *format;
452
453 switch (code->pad) {
454 case IPIPEIF_PAD_SINK:
455 if (code->index >= ARRAY_SIZE(ipipeif_fmts))
456 return -EINVAL;
457
458 code->code = ipipeif_fmts[code->index];
459 break;
460
461 case IPIPEIF_PAD_SOURCE_ISIF_SF:
462 case IPIPEIF_PAD_SOURCE_VP:
463 /* No format conversion inside IPIPEIF */
464 if (code->index != 0)
465 return -EINVAL;
466
467 format = __ipipeif_get_format(ipipeif, sd_state,
468 IPIPEIF_PAD_SINK,
469 which: code->which);
470
471 code->code = format->code;
472 break;
473
474 default:
475 return -EINVAL;
476 }
477
478 return 0;
479}
480
481static int ipipeif_enum_frame_size(struct v4l2_subdev *sd,
482 struct v4l2_subdev_state *sd_state,
483 struct v4l2_subdev_frame_size_enum *fse)
484{
485 struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
486 struct v4l2_mbus_framefmt format;
487
488 if (fse->index != 0)
489 return -EINVAL;
490
491 format.code = fse->code;
492 format.width = 1;
493 format.height = 1;
494 ipipeif_try_format(ipipeif, sd_state, pad: fse->pad, fmt: &format, which: fse->which);
495 fse->min_width = format.width;
496 fse->min_height = format.height;
497
498 if (format.code != fse->code)
499 return -EINVAL;
500
501 format.code = fse->code;
502 format.width = -1;
503 format.height = -1;
504 ipipeif_try_format(ipipeif, sd_state, pad: fse->pad, fmt: &format, which: fse->which);
505 fse->max_width = format.width;
506 fse->max_height = format.height;
507
508 return 0;
509}
510
511/*
512 * ipipeif_get_format - Retrieve the video format on a pad
513 * @sd : ISP IPIPEIF V4L2 subdevice
514 * @sd_state: V4L2 subdev state
515 * @fmt: Format
516 *
517 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
518 * to the format type.
519 */
520static int ipipeif_get_format(struct v4l2_subdev *sd,
521 struct v4l2_subdev_state *sd_state,
522 struct v4l2_subdev_format *fmt)
523{
524 struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
525 struct v4l2_mbus_framefmt *format;
526
527 format = __ipipeif_get_format(ipipeif, sd_state, pad: fmt->pad, which: fmt->which);
528 if (!format)
529 return -EINVAL;
530
531 fmt->format = *format;
532 return 0;
533}
534
535/*
536 * ipipeif_set_format - Set the video format on a pad
537 * @sd : ISP IPIPEIF V4L2 subdevice
538 * @sd_state: V4L2 subdev state
539 * @fmt: Format
540 *
541 * Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
542 * to the format type.
543 */
544static int ipipeif_set_format(struct v4l2_subdev *sd,
545 struct v4l2_subdev_state *sd_state,
546 struct v4l2_subdev_format *fmt)
547{
548 struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
549 struct v4l2_mbus_framefmt *format;
550
551 format = __ipipeif_get_format(ipipeif, sd_state, pad: fmt->pad, which: fmt->which);
552 if (!format)
553 return -EINVAL;
554
555 ipipeif_try_format(ipipeif, sd_state, pad: fmt->pad, fmt: &fmt->format,
556 which: fmt->which);
557 *format = fmt->format;
558
559 /* Propagate the format from sink to source */
560 if (fmt->pad == IPIPEIF_PAD_SINK) {
561 format = __ipipeif_get_format(ipipeif, sd_state,
562 IPIPEIF_PAD_SOURCE_ISIF_SF,
563 which: fmt->which);
564 *format = fmt->format;
565 ipipeif_try_format(ipipeif, sd_state,
566 IPIPEIF_PAD_SOURCE_ISIF_SF,
567 fmt: format, which: fmt->which);
568
569 format = __ipipeif_get_format(ipipeif, sd_state,
570 IPIPEIF_PAD_SOURCE_VP,
571 which: fmt->which);
572 *format = fmt->format;
573 ipipeif_try_format(ipipeif, sd_state, IPIPEIF_PAD_SOURCE_VP,
574 fmt: format,
575 which: fmt->which);
576 }
577
578 return 0;
579}
580
581static int ipipeif_link_validate(struct v4l2_subdev *sd,
582 struct media_link *link,
583 struct v4l2_subdev_format *source_fmt,
584 struct v4l2_subdev_format *sink_fmt)
585{
586 /* Check if the two ends match */
587 if (source_fmt->format.width != sink_fmt->format.width ||
588 source_fmt->format.height != sink_fmt->format.height)
589 return -EPIPE;
590
591 if (source_fmt->format.code != sink_fmt->format.code)
592 return -EPIPE;
593
594 return 0;
595}
596
597/*
598 * ipipeif_init_formats - Initialize formats on all pads
599 * @sd: ISP IPIPEIF V4L2 subdevice
600 * @fh: V4L2 subdev file handle
601 *
602 * Initialize all pad formats with default values. If fh is not NULL, try
603 * formats are initialized on the file handle. Otherwise active formats are
604 * initialized on the device.
605 */
606static int ipipeif_init_formats(struct v4l2_subdev *sd,
607 struct v4l2_subdev_fh *fh)
608{
609 struct v4l2_subdev_format format;
610
611 memset(&format, 0, sizeof(format));
612 format.pad = IPIPEIF_PAD_SINK;
613 format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
614 format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
615 format.format.width = 4096;
616 format.format.height = 4096;
617 ipipeif_set_format(sd, sd_state: fh ? fh->state : NULL, fmt: &format);
618
619 return 0;
620}
621
622/* V4L2 subdev video operations */
623static const struct v4l2_subdev_video_ops ipipeif_v4l2_video_ops = {
624 .s_stream = ipipeif_set_stream,
625};
626
627/* V4L2 subdev pad operations */
628static const struct v4l2_subdev_pad_ops ipipeif_v4l2_pad_ops = {
629 .enum_mbus_code = ipipeif_enum_mbus_code,
630 .enum_frame_size = ipipeif_enum_frame_size,
631 .get_fmt = ipipeif_get_format,
632 .set_fmt = ipipeif_set_format,
633 .link_validate = ipipeif_link_validate,
634};
635
636/* V4L2 subdev operations */
637static const struct v4l2_subdev_ops ipipeif_v4l2_ops = {
638 .video = &ipipeif_v4l2_video_ops,
639 .pad = &ipipeif_v4l2_pad_ops,
640};
641
642/* V4L2 subdev internal operations */
643static const struct v4l2_subdev_internal_ops ipipeif_v4l2_internal_ops = {
644 .open = ipipeif_init_formats,
645};
646
647/* -----------------------------------------------------------------------------
648 * Media entity operations
649 */
650
651/*
652 * ipipeif_link_setup - Setup IPIPEIF connections
653 * @entity: IPIPEIF media entity
654 * @local: Pad at the local end of the link
655 * @remote: Pad at the remote end of the link
656 * @flags: Link flags
657 *
658 * return -EINVAL or zero on success
659 */
660static int ipipeif_link_setup(struct media_entity *entity,
661 const struct media_pad *local,
662 const struct media_pad *remote, u32 flags)
663{
664 struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
665 struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
666 struct iss_device *iss = to_iss_device(ipipeif);
667 unsigned int index = local->index;
668
669 /* FIXME: this is actually a hack! */
670 if (is_media_entity_v4l2_subdev(entity: remote->entity))
671 index |= 2 << 16;
672
673 switch (index) {
674 case IPIPEIF_PAD_SINK | 2 << 16:
675 /* Read from the sensor CSI2a or CSI2b. */
676 if (!(flags & MEDIA_LNK_FL_ENABLED)) {
677 ipipeif->input = IPIPEIF_INPUT_NONE;
678 break;
679 }
680
681 if (ipipeif->input != IPIPEIF_INPUT_NONE)
682 return -EBUSY;
683
684 if (remote->entity == &iss->csi2a.subdev.entity)
685 ipipeif->input = IPIPEIF_INPUT_CSI2A;
686 else if (remote->entity == &iss->csi2b.subdev.entity)
687 ipipeif->input = IPIPEIF_INPUT_CSI2B;
688
689 break;
690
691 case IPIPEIF_PAD_SOURCE_ISIF_SF:
692 /* Write to memory */
693 if (flags & MEDIA_LNK_FL_ENABLED) {
694 if (ipipeif->output & ~IPIPEIF_OUTPUT_MEMORY)
695 return -EBUSY;
696 ipipeif->output |= IPIPEIF_OUTPUT_MEMORY;
697 } else {
698 ipipeif->output &= ~IPIPEIF_OUTPUT_MEMORY;
699 }
700 break;
701
702 case IPIPEIF_PAD_SOURCE_VP | 2 << 16:
703 /* Send to IPIPE/RESIZER */
704 if (flags & MEDIA_LNK_FL_ENABLED) {
705 if (ipipeif->output & ~IPIPEIF_OUTPUT_VP)
706 return -EBUSY;
707 ipipeif->output |= IPIPEIF_OUTPUT_VP;
708 } else {
709 ipipeif->output &= ~IPIPEIF_OUTPUT_VP;
710 }
711 break;
712
713 default:
714 return -EINVAL;
715 }
716
717 return 0;
718}
719
720/* media operations */
721static const struct media_entity_operations ipipeif_media_ops = {
722 .link_setup = ipipeif_link_setup,
723 .link_validate = v4l2_subdev_link_validate,
724};
725
726/*
727 * ipipeif_init_entities - Initialize V4L2 subdev and media entity
728 * @ipipeif: ISS ISP IPIPEIF module
729 *
730 * Return 0 on success and a negative error code on failure.
731 */
732static int ipipeif_init_entities(struct iss_ipipeif_device *ipipeif)
733{
734 struct v4l2_subdev *sd = &ipipeif->subdev;
735 struct media_pad *pads = ipipeif->pads;
736 struct media_entity *me = &sd->entity;
737 int ret;
738
739 ipipeif->input = IPIPEIF_INPUT_NONE;
740
741 v4l2_subdev_init(sd, ops: &ipipeif_v4l2_ops);
742 sd->internal_ops = &ipipeif_v4l2_internal_ops;
743 strscpy(sd->name, "OMAP4 ISS ISP IPIPEIF", sizeof(sd->name));
744 sd->grp_id = BIT(16); /* group ID for iss subdevs */
745 v4l2_set_subdevdata(sd, p: ipipeif);
746 sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
747
748 pads[IPIPEIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
749 pads[IPIPEIF_PAD_SOURCE_ISIF_SF].flags = MEDIA_PAD_FL_SOURCE;
750 pads[IPIPEIF_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
751
752 me->ops = &ipipeif_media_ops;
753 ret = media_entity_pads_init(entity: me, IPIPEIF_PADS_NUM, pads);
754 if (ret < 0)
755 return ret;
756
757 ipipeif_init_formats(sd, NULL);
758
759 ipipeif->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
760 ipipeif->video_out.ops = &ipipeif_video_ops;
761 ipipeif->video_out.iss = to_iss_device(ipipeif);
762 ipipeif->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
763 ipipeif->video_out.bpl_alignment = 32;
764 ipipeif->video_out.bpl_zero_padding = 1;
765 ipipeif->video_out.bpl_max = 0x1ffe0;
766
767 return omap4iss_video_init(video: &ipipeif->video_out, name: "ISP IPIPEIF");
768}
769
770void omap4iss_ipipeif_unregister_entities(struct iss_ipipeif_device *ipipeif)
771{
772 v4l2_device_unregister_subdev(sd: &ipipeif->subdev);
773 omap4iss_video_unregister(video: &ipipeif->video_out);
774}
775
776int omap4iss_ipipeif_register_entities(struct iss_ipipeif_device *ipipeif,
777 struct v4l2_device *vdev)
778{
779 int ret;
780
781 /* Register the subdev and video node. */
782 ret = v4l2_device_register_subdev(v4l2_dev: vdev, sd: &ipipeif->subdev);
783 if (ret < 0)
784 goto error;
785
786 ret = omap4iss_video_register(video: &ipipeif->video_out, vdev);
787 if (ret < 0)
788 goto error;
789
790 return 0;
791
792error:
793 omap4iss_ipipeif_unregister_entities(ipipeif);
794 return ret;
795}
796
797/* -----------------------------------------------------------------------------
798 * ISP IPIPEIF initialisation and cleanup
799 */
800
801/*
802 * omap4iss_ipipeif_init - IPIPEIF module initialization.
803 * @iss: Device pointer specific to the OMAP4 ISS.
804 *
805 * TODO: Get the initialisation values from platform data.
806 *
807 * Return 0 on success or a negative error code otherwise.
808 */
809int omap4iss_ipipeif_init(struct iss_device *iss)
810{
811 struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
812
813 ipipeif->state = ISS_PIPELINE_STREAM_STOPPED;
814 init_waitqueue_head(&ipipeif->wait);
815
816 return ipipeif_init_entities(ipipeif);
817}
818
819/*
820 * omap4iss_ipipeif_create_links() - IPIPEIF pads links creation
821 * @iss: Pointer to ISS device
822 *
823 * return negative error code or zero on success
824 */
825int omap4iss_ipipeif_create_links(struct iss_device *iss)
826{
827 struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
828
829 /* Connect the IPIPEIF subdev to the video node. */
830 return media_create_pad_link(source: &ipipeif->subdev.entity,
831 IPIPEIF_PAD_SOURCE_ISIF_SF,
832 sink: &ipipeif->video_out.video.entity, sink_pad: 0, flags: 0);
833}
834
835/*
836 * omap4iss_ipipeif_cleanup - IPIPEIF module cleanup.
837 * @iss: Device pointer specific to the OMAP4 ISS.
838 */
839void omap4iss_ipipeif_cleanup(struct iss_device *iss)
840{
841 struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
842
843 media_entity_cleanup(entity: &ipipeif->subdev.entity);
844}
845

source code of linux/drivers/staging/media/omap4iss/iss_ipipeif.c