1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * camss-video.c
4  *
5  * Qualcomm MSM Camera Subsystem - V4L2 device node
6  *
7  * Copyright (c) 2013-2015, The Linux Foundation. All rights reserved.
8  * Copyright (C) 2015-2018 Linaro Ltd.
9  */
10 #include <linux/slab.h>
11 #include <media/media-entity.h>
12 #include <media/v4l2-dev.h>
13 #include <media/v4l2-device.h>
14 #include <media/v4l2-ioctl.h>
15 #include <media/v4l2-mc.h>
16 #include <media/videobuf2-dma-sg.h>
17 
18 #include "camss-video.h"
19 #include "camss.h"
20 
21 struct fract {
22 	u8 numerator;
23 	u8 denominator;
24 };
25 
26 /*
27  * struct camss_format_info - ISP media bus format information
28  * @code: V4L2 media bus format code
29  * @pixelformat: V4L2 pixel format FCC identifier
30  * @planes: Number of planes
31  * @hsub: Horizontal subsampling (for each plane)
32  * @vsub: Vertical subsampling (for each plane)
33  * @bpp: Bits per pixel when stored in memory (for each plane)
34  */
35 struct camss_format_info {
36 	u32 code;
37 	u32 pixelformat;
38 	u8 planes;
39 	struct fract hsub[3];
40 	struct fract vsub[3];
41 	unsigned int bpp[3];
42 };
43 
44 static const struct camss_format_info formats_rdi_8x16[] = {
45 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
46 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
47 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
48 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
49 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
50 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
51 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
52 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
53 	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
54 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
55 	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
56 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
57 	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
58 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
59 	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
60 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
61 	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
62 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
63 	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
64 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
65 	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
66 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
67 	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
68 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
69 	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
70 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
71 	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
72 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
73 	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
74 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
75 	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
76 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
77 	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
78 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
79 };
80 
81 static const struct camss_format_info formats_rdi_8x96[] = {
82 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
83 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
84 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
85 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
86 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
87 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
88 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
89 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
90 	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
91 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
92 	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
93 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
94 	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
95 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
96 	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
97 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
98 	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
99 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
100 	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
101 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
102 	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
103 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
104 	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
105 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
106 	{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_PIX_FMT_SBGGR10, 1,
107 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
108 	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
109 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
110 	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
111 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
112 	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
113 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
114 	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
115 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
116 	{ MEDIA_BUS_FMT_SBGGR14_1X14, V4L2_PIX_FMT_SBGGR14P, 1,
117 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
118 	{ MEDIA_BUS_FMT_SGBRG14_1X14, V4L2_PIX_FMT_SGBRG14P, 1,
119 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
120 	{ MEDIA_BUS_FMT_SGRBG14_1X14, V4L2_PIX_FMT_SGRBG14P, 1,
121 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
122 	{ MEDIA_BUS_FMT_SRGGB14_1X14, V4L2_PIX_FMT_SRGGB14P, 1,
123 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
124 	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
125 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
126 	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, V4L2_PIX_FMT_Y10, 1,
127 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
128 };
129 
130 static const struct camss_format_info formats_pix_8x16[] = {
131 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
132 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
133 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
134 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
135 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
136 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
137 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
138 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
139 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
140 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
141 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
142 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
143 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
144 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
145 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
146 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
147 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
148 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
149 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
150 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
151 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
152 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
153 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
154 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
155 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
156 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
157 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
158 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
159 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
160 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
161 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
162 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
163 };
164 
165 static const struct camss_format_info formats_pix_8x96[] = {
166 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
167 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
168 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
169 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
170 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
171 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
172 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
173 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
174 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
175 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
176 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
177 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
178 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
179 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
180 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
181 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
182 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
183 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
184 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
185 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
186 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
187 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
188 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
189 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
190 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
191 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
192 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
193 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
194 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
195 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
196 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
197 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
198 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
199 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
200 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
201 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
202 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
203 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
204 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
205 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
206 };
207 
208 /* -----------------------------------------------------------------------------
209  * Helper functions
210  */
211 
212 static int video_find_format(u32 code, u32 pixelformat,
213 			     const struct camss_format_info *formats,
214 			     unsigned int nformats)
215 {
216 	int i;
217 
218 	for (i = 0; i < nformats; i++) {
219 		if (formats[i].code == code &&
220 		    formats[i].pixelformat == pixelformat)
221 			return i;
222 	}
223 
224 	for (i = 0; i < nformats; i++)
225 		if (formats[i].code == code)
226 			return i;
227 
228 	WARN_ON(1);
229 
230 	return -EINVAL;
231 }
232 
233 /*
234  * video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane
235  * @mbus: v4l2_mbus_framefmt format (input)
236  * @pix: v4l2_pix_format_mplane format (output)
237  * @f: a pointer to formats array element to be used for the conversion
238  * @alignment: bytesperline alignment value
239  *
240  * Fill the output pix structure with information from the input mbus format.
241  *
242  * Return 0 on success or a negative error code otherwise
243  */
244 static int video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt *mbus,
245 				struct v4l2_pix_format_mplane *pix,
246 				const struct camss_format_info *f,
247 				unsigned int alignment)
248 {
249 	unsigned int i;
250 	u32 bytesperline;
251 
252 	memset(pix, 0, sizeof(*pix));
253 	v4l2_fill_pix_format_mplane(pix, mbus);
254 	pix->pixelformat = f->pixelformat;
255 	pix->num_planes = f->planes;
256 	for (i = 0; i < pix->num_planes; i++) {
257 		bytesperline = pix->width / f->hsub[i].numerator *
258 			f->hsub[i].denominator * f->bpp[i] / 8;
259 		bytesperline = ALIGN(bytesperline, alignment);
260 		pix->plane_fmt[i].bytesperline = bytesperline;
261 		pix->plane_fmt[i].sizeimage = pix->height /
262 				f->vsub[i].numerator * f->vsub[i].denominator *
263 				bytesperline;
264 	}
265 
266 	return 0;
267 }
268 
269 static struct v4l2_subdev *video_remote_subdev(struct camss_video *video,
270 					       u32 *pad)
271 {
272 	struct media_pad *remote;
273 
274 	remote = media_entity_remote_pad(&video->pad);
275 
276 	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
277 		return NULL;
278 
279 	if (pad)
280 		*pad = remote->index;
281 
282 	return media_entity_to_v4l2_subdev(remote->entity);
283 }
284 
285 static int video_get_subdev_format(struct camss_video *video,
286 				   struct v4l2_format *format)
287 {
288 	struct v4l2_subdev_format fmt;
289 	struct v4l2_subdev *subdev;
290 	u32 pad;
291 	int ret;
292 
293 	subdev = video_remote_subdev(video, &pad);
294 	if (subdev == NULL)
295 		return -EPIPE;
296 
297 	fmt.pad = pad;
298 	fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
299 
300 	ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
301 	if (ret)
302 		return ret;
303 
304 	ret = video_find_format(fmt.format.code,
305 				format->fmt.pix_mp.pixelformat,
306 				video->formats, video->nformats);
307 	if (ret < 0)
308 		return ret;
309 
310 	format->type = video->type;
311 
312 	return video_mbus_to_pix_mp(&fmt.format, &format->fmt.pix_mp,
313 				    &video->formats[ret], video->bpl_alignment);
314 }
315 
316 /* -----------------------------------------------------------------------------
317  * Video queue operations
318  */
319 
320 static int video_queue_setup(struct vb2_queue *q,
321 	unsigned int *num_buffers, unsigned int *num_planes,
322 	unsigned int sizes[], struct device *alloc_devs[])
323 {
324 	struct camss_video *video = vb2_get_drv_priv(q);
325 	const struct v4l2_pix_format_mplane *format =
326 						&video->active_fmt.fmt.pix_mp;
327 	unsigned int i;
328 
329 	if (*num_planes) {
330 		if (*num_planes != format->num_planes)
331 			return -EINVAL;
332 
333 		for (i = 0; i < *num_planes; i++)
334 			if (sizes[i] < format->plane_fmt[i].sizeimage)
335 				return -EINVAL;
336 
337 		return 0;
338 	}
339 
340 	*num_planes = format->num_planes;
341 
342 	for (i = 0; i < *num_planes; i++)
343 		sizes[i] = format->plane_fmt[i].sizeimage;
344 
345 	return 0;
346 }
347 
348 static int video_buf_init(struct vb2_buffer *vb)
349 {
350 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
351 	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
352 	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
353 						   vb);
354 	const struct v4l2_pix_format_mplane *format =
355 						&video->active_fmt.fmt.pix_mp;
356 	struct sg_table *sgt;
357 	unsigned int i;
358 
359 	for (i = 0; i < format->num_planes; i++) {
360 		sgt = vb2_dma_sg_plane_desc(vb, i);
361 		if (!sgt)
362 			return -EFAULT;
363 
364 		buffer->addr[i] = sg_dma_address(sgt->sgl);
365 	}
366 
367 	if (format->pixelformat == V4L2_PIX_FMT_NV12 ||
368 			format->pixelformat == V4L2_PIX_FMT_NV21 ||
369 			format->pixelformat == V4L2_PIX_FMT_NV16 ||
370 			format->pixelformat == V4L2_PIX_FMT_NV61)
371 		buffer->addr[1] = buffer->addr[0] +
372 				format->plane_fmt[0].bytesperline *
373 				format->height;
374 
375 	return 0;
376 }
377 
378 static int video_buf_prepare(struct vb2_buffer *vb)
379 {
380 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
381 	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
382 	const struct v4l2_pix_format_mplane *format =
383 						&video->active_fmt.fmt.pix_mp;
384 	unsigned int i;
385 
386 	for (i = 0; i < format->num_planes; i++) {
387 		if (format->plane_fmt[i].sizeimage > vb2_plane_size(vb, i))
388 			return -EINVAL;
389 
390 		vb2_set_plane_payload(vb, i, format->plane_fmt[i].sizeimage);
391 	}
392 
393 	vbuf->field = V4L2_FIELD_NONE;
394 
395 	return 0;
396 }
397 
398 static void video_buf_queue(struct vb2_buffer *vb)
399 {
400 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
401 	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
402 	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
403 						   vb);
404 
405 	video->ops->queue_buffer(video, buffer);
406 }
407 
408 static int video_check_format(struct camss_video *video)
409 {
410 	struct v4l2_pix_format_mplane *pix = &video->active_fmt.fmt.pix_mp;
411 	struct v4l2_format format;
412 	struct v4l2_pix_format_mplane *sd_pix = &format.fmt.pix_mp;
413 	int ret;
414 
415 	sd_pix->pixelformat = pix->pixelformat;
416 	ret = video_get_subdev_format(video, &format);
417 	if (ret < 0)
418 		return ret;
419 
420 	if (pix->pixelformat != sd_pix->pixelformat ||
421 	    pix->height != sd_pix->height ||
422 	    pix->width != sd_pix->width ||
423 	    pix->num_planes != sd_pix->num_planes ||
424 	    pix->field != format.fmt.pix_mp.field)
425 		return -EPIPE;
426 
427 	return 0;
428 }
429 
430 static int video_start_streaming(struct vb2_queue *q, unsigned int count)
431 {
432 	struct camss_video *video = vb2_get_drv_priv(q);
433 	struct video_device *vdev = &video->vdev;
434 	struct media_entity *entity;
435 	struct media_pad *pad;
436 	struct v4l2_subdev *subdev;
437 	int ret;
438 
439 	ret = media_pipeline_start(&vdev->entity, &video->pipe);
440 	if (ret < 0)
441 		return ret;
442 
443 	ret = video_check_format(video);
444 	if (ret < 0)
445 		goto error;
446 
447 	entity = &vdev->entity;
448 	while (1) {
449 		pad = &entity->pads[0];
450 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
451 			break;
452 
453 		pad = media_entity_remote_pad(pad);
454 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
455 			break;
456 
457 		entity = pad->entity;
458 		subdev = media_entity_to_v4l2_subdev(entity);
459 
460 		ret = v4l2_subdev_call(subdev, video, s_stream, 1);
461 		if (ret < 0 && ret != -ENOIOCTLCMD)
462 			goto error;
463 	}
464 
465 	return 0;
466 
467 error:
468 	media_pipeline_stop(&vdev->entity);
469 
470 	video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);
471 
472 	return ret;
473 }
474 
475 static void video_stop_streaming(struct vb2_queue *q)
476 {
477 	struct camss_video *video = vb2_get_drv_priv(q);
478 	struct video_device *vdev = &video->vdev;
479 	struct media_entity *entity;
480 	struct media_pad *pad;
481 	struct v4l2_subdev *subdev;
482 
483 	entity = &vdev->entity;
484 	while (1) {
485 		pad = &entity->pads[0];
486 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
487 			break;
488 
489 		pad = media_entity_remote_pad(pad);
490 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
491 			break;
492 
493 		entity = pad->entity;
494 		subdev = media_entity_to_v4l2_subdev(entity);
495 
496 		v4l2_subdev_call(subdev, video, s_stream, 0);
497 	}
498 
499 	media_pipeline_stop(&vdev->entity);
500 
501 	video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
502 }
503 
504 static const struct vb2_ops msm_video_vb2_q_ops = {
505 	.queue_setup     = video_queue_setup,
506 	.wait_prepare    = vb2_ops_wait_prepare,
507 	.wait_finish     = vb2_ops_wait_finish,
508 	.buf_init        = video_buf_init,
509 	.buf_prepare     = video_buf_prepare,
510 	.buf_queue       = video_buf_queue,
511 	.start_streaming = video_start_streaming,
512 	.stop_streaming  = video_stop_streaming,
513 };
514 
515 /* -----------------------------------------------------------------------------
516  * V4L2 ioctls
517  */
518 
519 static int video_querycap(struct file *file, void *fh,
520 			  struct v4l2_capability *cap)
521 {
522 	struct camss_video *video = video_drvdata(file);
523 
524 	strscpy(cap->driver, "qcom-camss", sizeof(cap->driver));
525 	strscpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card));
526 	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
527 		 dev_name(video->camss->dev));
528 
529 	return 0;
530 }
531 
532 static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
533 {
534 	struct camss_video *video = video_drvdata(file);
535 	int i, j, k;
536 
537 	if (f->type != video->type)
538 		return -EINVAL;
539 
540 	if (f->index >= video->nformats)
541 		return -EINVAL;
542 
543 	/* find index "i" of "k"th unique pixelformat in formats array */
544 	k = -1;
545 	for (i = 0; i < video->nformats; i++) {
546 		for (j = 0; j < i; j++) {
547 			if (video->formats[i].pixelformat ==
548 					video->formats[j].pixelformat)
549 				break;
550 		}
551 
552 		if (j == i)
553 			k++;
554 
555 		if (k == f->index)
556 			break;
557 	}
558 
559 	if (k < f->index)
560 		return -EINVAL;
561 
562 	f->pixelformat = video->formats[i].pixelformat;
563 
564 	return 0;
565 }
566 
567 static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
568 {
569 	struct camss_video *video = video_drvdata(file);
570 
571 	*f = video->active_fmt;
572 
573 	return 0;
574 }
575 
576 static int __video_try_fmt(struct camss_video *video, struct v4l2_format *f)
577 {
578 	struct v4l2_pix_format_mplane *pix_mp;
579 	const struct camss_format_info *fi;
580 	struct v4l2_plane_pix_format *p;
581 	u32 bytesperline[3] = { 0 };
582 	u32 sizeimage[3] = { 0 };
583 	u32 width, height;
584 	u32 bpl, lines;
585 	int i, j;
586 
587 	pix_mp = &f->fmt.pix_mp;
588 
589 	if (video->line_based)
590 		for (i = 0; i < pix_mp->num_planes && i < 3; i++) {
591 			p = &pix_mp->plane_fmt[i];
592 			bytesperline[i] = clamp_t(u32, p->bytesperline,
593 						  1, 65528);
594 			sizeimage[i] = clamp_t(u32, p->sizeimage,
595 					       bytesperline[i],
596 					       bytesperline[i] * 4096);
597 		}
598 
599 	for (j = 0; j < video->nformats; j++)
600 		if (pix_mp->pixelformat == video->formats[j].pixelformat)
601 			break;
602 
603 	if (j == video->nformats)
604 		j = 0; /* default format */
605 
606 	fi = &video->formats[j];
607 	width = pix_mp->width;
608 	height = pix_mp->height;
609 
610 	memset(pix_mp, 0, sizeof(*pix_mp));
611 
612 	pix_mp->pixelformat = fi->pixelformat;
613 	pix_mp->width = clamp_t(u32, width, 1, 8191);
614 	pix_mp->height = clamp_t(u32, height, 1, 8191);
615 	pix_mp->num_planes = fi->planes;
616 	for (i = 0; i < pix_mp->num_planes; i++) {
617 		bpl = pix_mp->width / fi->hsub[i].numerator *
618 			fi->hsub[i].denominator * fi->bpp[i] / 8;
619 		bpl = ALIGN(bpl, video->bpl_alignment);
620 		pix_mp->plane_fmt[i].bytesperline = bpl;
621 		pix_mp->plane_fmt[i].sizeimage = pix_mp->height /
622 			fi->vsub[i].numerator * fi->vsub[i].denominator * bpl;
623 	}
624 
625 	pix_mp->field = V4L2_FIELD_NONE;
626 	pix_mp->colorspace = V4L2_COLORSPACE_SRGB;
627 	pix_mp->flags = 0;
628 	pix_mp->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_mp->colorspace);
629 	pix_mp->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
630 					pix_mp->colorspace, pix_mp->ycbcr_enc);
631 	pix_mp->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_mp->colorspace);
632 
633 	if (video->line_based)
634 		for (i = 0; i < pix_mp->num_planes; i++) {
635 			p = &pix_mp->plane_fmt[i];
636 			p->bytesperline = clamp_t(u32, p->bytesperline,
637 						  1, 65528);
638 			p->sizeimage = clamp_t(u32, p->sizeimage,
639 					       p->bytesperline,
640 					       p->bytesperline * 4096);
641 			lines = p->sizeimage / p->bytesperline;
642 
643 			if (p->bytesperline < bytesperline[i])
644 				p->bytesperline = ALIGN(bytesperline[i], 8);
645 
646 			if (p->sizeimage < p->bytesperline * lines)
647 				p->sizeimage = p->bytesperline * lines;
648 
649 			if (p->sizeimage < sizeimage[i])
650 				p->sizeimage = sizeimage[i];
651 		}
652 
653 	return 0;
654 }
655 
656 static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
657 {
658 	struct camss_video *video = video_drvdata(file);
659 
660 	return __video_try_fmt(video, f);
661 }
662 
663 static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
664 {
665 	struct camss_video *video = video_drvdata(file);
666 	int ret;
667 
668 	if (vb2_is_busy(&video->vb2_q))
669 		return -EBUSY;
670 
671 	ret = __video_try_fmt(video, f);
672 	if (ret < 0)
673 		return ret;
674 
675 	video->active_fmt = *f;
676 
677 	return 0;
678 }
679 
680 static int video_enum_input(struct file *file, void *fh,
681 			    struct v4l2_input *input)
682 {
683 	if (input->index > 0)
684 		return -EINVAL;
685 
686 	strscpy(input->name, "camera", sizeof(input->name));
687 	input->type = V4L2_INPUT_TYPE_CAMERA;
688 
689 	return 0;
690 }
691 
692 static int video_g_input(struct file *file, void *fh, unsigned int *input)
693 {
694 	*input = 0;
695 
696 	return 0;
697 }
698 
699 static int video_s_input(struct file *file, void *fh, unsigned int input)
700 {
701 	return input == 0 ? 0 : -EINVAL;
702 }
703 
704 static const struct v4l2_ioctl_ops msm_vid_ioctl_ops = {
705 	.vidioc_querycap		= video_querycap,
706 	.vidioc_enum_fmt_vid_cap	= video_enum_fmt,
707 	.vidioc_g_fmt_vid_cap_mplane	= video_g_fmt,
708 	.vidioc_s_fmt_vid_cap_mplane	= video_s_fmt,
709 	.vidioc_try_fmt_vid_cap_mplane	= video_try_fmt,
710 	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
711 	.vidioc_querybuf		= vb2_ioctl_querybuf,
712 	.vidioc_qbuf			= vb2_ioctl_qbuf,
713 	.vidioc_expbuf			= vb2_ioctl_expbuf,
714 	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
715 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
716 	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
717 	.vidioc_streamon		= vb2_ioctl_streamon,
718 	.vidioc_streamoff		= vb2_ioctl_streamoff,
719 	.vidioc_enum_input		= video_enum_input,
720 	.vidioc_g_input			= video_g_input,
721 	.vidioc_s_input			= video_s_input,
722 };
723 
724 /* -----------------------------------------------------------------------------
725  * V4L2 file operations
726  */
727 
728 static int video_open(struct file *file)
729 {
730 	struct video_device *vdev = video_devdata(file);
731 	struct camss_video *video = video_drvdata(file);
732 	struct v4l2_fh *vfh;
733 	int ret;
734 
735 	mutex_lock(&video->lock);
736 
737 	vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
738 	if (vfh == NULL) {
739 		ret = -ENOMEM;
740 		goto error_alloc;
741 	}
742 
743 	v4l2_fh_init(vfh, vdev);
744 	v4l2_fh_add(vfh);
745 
746 	file->private_data = vfh;
747 
748 	ret = v4l2_pipeline_pm_get(&vdev->entity);
749 	if (ret < 0) {
750 		dev_err(video->camss->dev, "Failed to power up pipeline: %d\n",
751 			ret);
752 		goto error_pm_use;
753 	}
754 
755 	mutex_unlock(&video->lock);
756 
757 	return 0;
758 
759 error_pm_use:
760 	v4l2_fh_release(file);
761 
762 error_alloc:
763 	mutex_unlock(&video->lock);
764 
765 	return ret;
766 }
767 
768 static int video_release(struct file *file)
769 {
770 	struct video_device *vdev = video_devdata(file);
771 
772 	vb2_fop_release(file);
773 
774 	v4l2_pipeline_pm_put(&vdev->entity);
775 
776 	file->private_data = NULL;
777 
778 	return 0;
779 }
780 
781 static const struct v4l2_file_operations msm_vid_fops = {
782 	.owner          = THIS_MODULE,
783 	.unlocked_ioctl = video_ioctl2,
784 	.open           = video_open,
785 	.release        = video_release,
786 	.poll           = vb2_fop_poll,
787 	.mmap		= vb2_fop_mmap,
788 	.read		= vb2_fop_read,
789 };
790 
791 /* -----------------------------------------------------------------------------
792  * CAMSS video core
793  */
794 
795 static void msm_video_release(struct video_device *vdev)
796 {
797 	struct camss_video *video = video_get_drvdata(vdev);
798 
799 	media_entity_cleanup(&vdev->entity);
800 
801 	mutex_destroy(&video->q_lock);
802 	mutex_destroy(&video->lock);
803 
804 	if (atomic_dec_and_test(&video->camss->ref_count))
805 		camss_delete(video->camss);
806 }
807 
808 /*
809  * msm_video_init_format - Helper function to initialize format
810  * @video: struct camss_video
811  *
812  * Initialize pad format with default value.
813  *
814  * Return 0 on success or a negative error code otherwise
815  */
816 static int msm_video_init_format(struct camss_video *video)
817 {
818 	int ret;
819 	struct v4l2_format format = {
820 		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
821 		.fmt.pix_mp = {
822 			.width = 1920,
823 			.height = 1080,
824 			.pixelformat = video->formats[0].pixelformat,
825 		},
826 	};
827 
828 	ret = __video_try_fmt(video, &format);
829 	if (ret < 0)
830 		return ret;
831 
832 	video->active_fmt = format;
833 
834 	return 0;
835 }
836 
837 /*
838  * msm_video_register - Register a video device node
839  * @video: struct camss_video
840  * @v4l2_dev: V4L2 device
841  * @name: name to be used for the video device node
842  *
843  * Initialize and register a video device node to a V4L2 device. Also
844  * initialize the vb2 queue.
845  *
846  * Return 0 on success or a negative error code otherwise
847  */
848 
849 int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev,
850 		       const char *name, int is_pix)
851 {
852 	struct media_pad *pad = &video->pad;
853 	struct video_device *vdev;
854 	struct vb2_queue *q;
855 	int ret;
856 
857 	vdev = &video->vdev;
858 
859 	mutex_init(&video->q_lock);
860 
861 	q = &video->vb2_q;
862 	q->drv_priv = video;
863 	q->mem_ops = &vb2_dma_sg_memops;
864 	q->ops = &msm_video_vb2_q_ops;
865 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
866 	q->io_modes = VB2_DMABUF | VB2_MMAP | VB2_READ;
867 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
868 	q->buf_struct_size = sizeof(struct camss_buffer);
869 	q->dev = video->camss->dev;
870 	q->lock = &video->q_lock;
871 	ret = vb2_queue_init(q);
872 	if (ret < 0) {
873 		dev_err(v4l2_dev->dev, "Failed to init vb2 queue: %d\n", ret);
874 		goto error_vb2_init;
875 	}
876 
877 	pad->flags = MEDIA_PAD_FL_SINK;
878 	ret = media_entity_pads_init(&vdev->entity, 1, pad);
879 	if (ret < 0) {
880 		dev_err(v4l2_dev->dev, "Failed to init video entity: %d\n",
881 			ret);
882 		goto error_media_init;
883 	}
884 
885 	mutex_init(&video->lock);
886 
887 	if (video->camss->version == CAMSS_8x16) {
888 		if (is_pix) {
889 			video->formats = formats_pix_8x16;
890 			video->nformats = ARRAY_SIZE(formats_pix_8x16);
891 		} else {
892 			video->formats = formats_rdi_8x16;
893 			video->nformats = ARRAY_SIZE(formats_rdi_8x16);
894 		}
895 	} else if (video->camss->version == CAMSS_8x96) {
896 		if (is_pix) {
897 			video->formats = formats_pix_8x96;
898 			video->nformats = ARRAY_SIZE(formats_pix_8x96);
899 		} else {
900 			video->formats = formats_rdi_8x96;
901 			video->nformats = ARRAY_SIZE(formats_rdi_8x96);
902 		}
903 	} else {
904 		goto error_video_register;
905 	}
906 
907 	ret = msm_video_init_format(video);
908 	if (ret < 0) {
909 		dev_err(v4l2_dev->dev, "Failed to init format: %d\n", ret);
910 		goto error_video_register;
911 	}
912 
913 	vdev->fops = &msm_vid_fops;
914 	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING |
915 							V4L2_CAP_READWRITE;
916 	vdev->ioctl_ops = &msm_vid_ioctl_ops;
917 	vdev->release = msm_video_release;
918 	vdev->v4l2_dev = v4l2_dev;
919 	vdev->vfl_dir = VFL_DIR_RX;
920 	vdev->queue = &video->vb2_q;
921 	vdev->lock = &video->lock;
922 	strscpy(vdev->name, name, sizeof(vdev->name));
923 
924 	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
925 	if (ret < 0) {
926 		dev_err(v4l2_dev->dev, "Failed to register video device: %d\n",
927 			ret);
928 		goto error_video_register;
929 	}
930 
931 	video_set_drvdata(vdev, video);
932 	atomic_inc(&video->camss->ref_count);
933 
934 	return 0;
935 
936 error_video_register:
937 	media_entity_cleanup(&vdev->entity);
938 	mutex_destroy(&video->lock);
939 error_media_init:
940 	vb2_queue_release(&video->vb2_q);
941 error_vb2_init:
942 	mutex_destroy(&video->q_lock);
943 
944 	return ret;
945 }
946 
947 void msm_video_stop_streaming(struct camss_video *video)
948 {
949 	if (vb2_is_streaming(&video->vb2_q))
950 		vb2_queue_release(&video->vb2_q);
951 }
952 
953 void msm_video_unregister(struct camss_video *video)
954 {
955 	atomic_inc(&video->camss->ref_count);
956 	video_unregister_device(&video->vdev);
957 	atomic_dec(&video->camss->ref_count);
958 }
959