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 #define CAMSS_FRAME_MIN_WIDTH		1
22 #define CAMSS_FRAME_MAX_WIDTH		8191
23 #define CAMSS_FRAME_MIN_HEIGHT		1
24 #define CAMSS_FRAME_MAX_HEIGHT_RDI	8191
25 #define CAMSS_FRAME_MAX_HEIGHT_PIX	4096
26 
27 struct fract {
28 	u8 numerator;
29 	u8 denominator;
30 };
31 
32 /*
33  * struct camss_format_info - ISP media bus format information
34  * @code: V4L2 media bus format code
35  * @pixelformat: V4L2 pixel format FCC identifier
36  * @planes: Number of planes
37  * @hsub: Horizontal subsampling (for each plane)
38  * @vsub: Vertical subsampling (for each plane)
39  * @bpp: Bits per pixel when stored in memory (for each plane)
40  */
41 struct camss_format_info {
42 	u32 code;
43 	u32 pixelformat;
44 	u8 planes;
45 	struct fract hsub[3];
46 	struct fract vsub[3];
47 	unsigned int bpp[3];
48 };
49 
50 static const struct camss_format_info formats_rdi_8x16[] = {
51 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
52 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
53 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
54 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
55 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
56 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
57 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
58 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
59 	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
60 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
61 	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
62 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
63 	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
64 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
65 	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
66 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
67 	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
68 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
69 	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
70 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
71 	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
72 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
73 	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
74 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
75 	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
76 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
77 	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
78 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
79 	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
80 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
81 	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
82 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
83 	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
84 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
85 };
86 
87 static const struct camss_format_info formats_rdi_8x96[] = {
88 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
89 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
90 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
91 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
92 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
93 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
94 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
95 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
96 	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
97 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
98 	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
99 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
100 	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
101 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
102 	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
103 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
104 	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
105 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
106 	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
107 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
108 	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
109 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
110 	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
111 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
112 	{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_PIX_FMT_SBGGR10, 1,
113 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
114 	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
115 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
116 	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
117 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
118 	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
119 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
120 	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
121 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
122 	{ MEDIA_BUS_FMT_SBGGR14_1X14, V4L2_PIX_FMT_SBGGR14P, 1,
123 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
124 	{ MEDIA_BUS_FMT_SGBRG14_1X14, V4L2_PIX_FMT_SGBRG14P, 1,
125 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
126 	{ MEDIA_BUS_FMT_SGRBG14_1X14, V4L2_PIX_FMT_SGRBG14P, 1,
127 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
128 	{ MEDIA_BUS_FMT_SRGGB14_1X14, V4L2_PIX_FMT_SRGGB14P, 1,
129 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
130 	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
131 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
132 	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, V4L2_PIX_FMT_Y10, 1,
133 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
134 };
135 
136 static const struct camss_format_info formats_rdi_845[] = {
137 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
138 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
139 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
140 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
141 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
142 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
143 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
144 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
145 	{ MEDIA_BUS_FMT_SBGGR8_1X8, V4L2_PIX_FMT_SBGGR8, 1,
146 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
147 	{ MEDIA_BUS_FMT_SGBRG8_1X8, V4L2_PIX_FMT_SGBRG8, 1,
148 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
149 	{ MEDIA_BUS_FMT_SGRBG8_1X8, V4L2_PIX_FMT_SGRBG8, 1,
150 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
151 	{ MEDIA_BUS_FMT_SRGGB8_1X8, V4L2_PIX_FMT_SRGGB8, 1,
152 	  { { 1, 1 } }, { { 1, 1 } }, { 8 } },
153 	{ MEDIA_BUS_FMT_SBGGR10_1X10, V4L2_PIX_FMT_SBGGR10P, 1,
154 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
155 	{ MEDIA_BUS_FMT_SGBRG10_1X10, V4L2_PIX_FMT_SGBRG10P, 1,
156 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
157 	{ MEDIA_BUS_FMT_SGRBG10_1X10, V4L2_PIX_FMT_SGRBG10P, 1,
158 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
159 	{ MEDIA_BUS_FMT_SRGGB10_1X10, V4L2_PIX_FMT_SRGGB10P, 1,
160 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
161 	{ MEDIA_BUS_FMT_SBGGR10_2X8_PADHI_LE, V4L2_PIX_FMT_SBGGR10, 1,
162 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
163 	{ MEDIA_BUS_FMT_SBGGR12_1X12, V4L2_PIX_FMT_SBGGR12P, 1,
164 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
165 	{ MEDIA_BUS_FMT_SGBRG12_1X12, V4L2_PIX_FMT_SGBRG12P, 1,
166 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
167 	{ MEDIA_BUS_FMT_SGRBG12_1X12, V4L2_PIX_FMT_SGRBG12P, 1,
168 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
169 	{ MEDIA_BUS_FMT_SRGGB12_1X12, V4L2_PIX_FMT_SRGGB12P, 1,
170 	  { { 1, 1 } }, { { 1, 1 } }, { 12 } },
171 	{ MEDIA_BUS_FMT_SBGGR14_1X14, V4L2_PIX_FMT_SBGGR14P, 1,
172 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
173 	{ MEDIA_BUS_FMT_SGBRG14_1X14, V4L2_PIX_FMT_SGBRG14P, 1,
174 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
175 	{ MEDIA_BUS_FMT_SGRBG14_1X14, V4L2_PIX_FMT_SGRBG14P, 1,
176 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
177 	{ MEDIA_BUS_FMT_SRGGB14_1X14, V4L2_PIX_FMT_SRGGB14P, 1,
178 	  { { 1, 1 } }, { { 1, 1 } }, { 14 } },
179 	{ MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1,
180 	  { { 1, 1 } }, { { 1, 1 } }, { 10 } },
181 	{ MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, V4L2_PIX_FMT_Y10, 1,
182 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
183 };
184 
185 static const struct camss_format_info formats_pix_8x16[] = {
186 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
187 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
188 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
189 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
190 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
191 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
192 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
193 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
194 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
195 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
196 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
197 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
198 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
199 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
200 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
201 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
202 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
203 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
204 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
205 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
206 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
207 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
208 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
209 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
210 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
211 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
212 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
213 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
214 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
215 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
216 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
217 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
218 };
219 
220 static const struct camss_format_info formats_pix_8x96[] = {
221 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1,
222 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
223 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1,
224 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
225 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
226 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
227 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1,
228 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
229 	{ MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1,
230 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
231 	{ MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1,
232 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
233 	{ MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
234 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
235 	{ MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1,
236 	  { { 1, 1 } }, { { 2, 3 } }, { 8 } },
237 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1,
238 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
239 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1,
240 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
241 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1,
242 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
243 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1,
244 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
245 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1,
246 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
247 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1,
248 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
249 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1,
250 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
251 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1,
252 	  { { 1, 1 } }, { { 1, 2 } }, { 8 } },
253 	{ MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1,
254 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
255 	{ MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1,
256 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
257 	{ MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1,
258 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
259 	{ MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1,
260 	  { { 1, 1 } }, { { 1, 1 } }, { 16 } },
261 };
262 
263 /* -----------------------------------------------------------------------------
264  * Helper functions
265  */
266 
video_find_format(u32 code,u32 pixelformat,const struct camss_format_info * formats,unsigned int nformats)267 static int video_find_format(u32 code, u32 pixelformat,
268 			     const struct camss_format_info *formats,
269 			     unsigned int nformats)
270 {
271 	int i;
272 
273 	for (i = 0; i < nformats; i++) {
274 		if (formats[i].code == code &&
275 		    formats[i].pixelformat == pixelformat)
276 			return i;
277 	}
278 
279 	for (i = 0; i < nformats; i++)
280 		if (formats[i].code == code)
281 			return i;
282 
283 	WARN_ON(1);
284 
285 	return -EINVAL;
286 }
287 
288 /*
289  * video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane
290  * @mbus: v4l2_mbus_framefmt format (input)
291  * @pix: v4l2_pix_format_mplane format (output)
292  * @f: a pointer to formats array element to be used for the conversion
293  * @alignment: bytesperline alignment value
294  *
295  * Fill the output pix structure with information from the input mbus format.
296  *
297  * Return 0 on success or a negative error code otherwise
298  */
video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt * mbus,struct v4l2_pix_format_mplane * pix,const struct camss_format_info * f,unsigned int alignment)299 static int video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt *mbus,
300 				struct v4l2_pix_format_mplane *pix,
301 				const struct camss_format_info *f,
302 				unsigned int alignment)
303 {
304 	unsigned int i;
305 	u32 bytesperline;
306 
307 	memset(pix, 0, sizeof(*pix));
308 	v4l2_fill_pix_format_mplane(pix, mbus);
309 	pix->pixelformat = f->pixelformat;
310 	pix->num_planes = f->planes;
311 	for (i = 0; i < pix->num_planes; i++) {
312 		bytesperline = pix->width / f->hsub[i].numerator *
313 			f->hsub[i].denominator * f->bpp[i] / 8;
314 		bytesperline = ALIGN(bytesperline, alignment);
315 		pix->plane_fmt[i].bytesperline = bytesperline;
316 		pix->plane_fmt[i].sizeimage = pix->height /
317 				f->vsub[i].numerator * f->vsub[i].denominator *
318 				bytesperline;
319 	}
320 
321 	return 0;
322 }
323 
video_remote_subdev(struct camss_video * video,u32 * pad)324 static struct v4l2_subdev *video_remote_subdev(struct camss_video *video,
325 					       u32 *pad)
326 {
327 	struct media_pad *remote;
328 
329 	remote = media_entity_remote_pad(&video->pad);
330 
331 	if (!remote || !is_media_entity_v4l2_subdev(remote->entity))
332 		return NULL;
333 
334 	if (pad)
335 		*pad = remote->index;
336 
337 	return media_entity_to_v4l2_subdev(remote->entity);
338 }
339 
video_get_subdev_format(struct camss_video * video,struct v4l2_format * format)340 static int video_get_subdev_format(struct camss_video *video,
341 				   struct v4l2_format *format)
342 {
343 	struct v4l2_subdev_format fmt;
344 	struct v4l2_subdev *subdev;
345 	u32 pad;
346 	int ret;
347 
348 	subdev = video_remote_subdev(video, &pad);
349 	if (subdev == NULL)
350 		return -EPIPE;
351 
352 	fmt.pad = pad;
353 	fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE;
354 
355 	ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt);
356 	if (ret)
357 		return ret;
358 
359 	ret = video_find_format(fmt.format.code,
360 				format->fmt.pix_mp.pixelformat,
361 				video->formats, video->nformats);
362 	if (ret < 0)
363 		return ret;
364 
365 	format->type = video->type;
366 
367 	return video_mbus_to_pix_mp(&fmt.format, &format->fmt.pix_mp,
368 				    &video->formats[ret], video->bpl_alignment);
369 }
370 
371 /* -----------------------------------------------------------------------------
372  * Video queue operations
373  */
374 
video_queue_setup(struct vb2_queue * q,unsigned int * num_buffers,unsigned int * num_planes,unsigned int sizes[],struct device * alloc_devs[])375 static int video_queue_setup(struct vb2_queue *q,
376 	unsigned int *num_buffers, unsigned int *num_planes,
377 	unsigned int sizes[], struct device *alloc_devs[])
378 {
379 	struct camss_video *video = vb2_get_drv_priv(q);
380 	const struct v4l2_pix_format_mplane *format =
381 						&video->active_fmt.fmt.pix_mp;
382 	unsigned int i;
383 
384 	if (*num_planes) {
385 		if (*num_planes != format->num_planes)
386 			return -EINVAL;
387 
388 		for (i = 0; i < *num_planes; i++)
389 			if (sizes[i] < format->plane_fmt[i].sizeimage)
390 				return -EINVAL;
391 
392 		return 0;
393 	}
394 
395 	*num_planes = format->num_planes;
396 
397 	for (i = 0; i < *num_planes; i++)
398 		sizes[i] = format->plane_fmt[i].sizeimage;
399 
400 	return 0;
401 }
402 
video_buf_init(struct vb2_buffer * vb)403 static int video_buf_init(struct vb2_buffer *vb)
404 {
405 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
406 	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
407 	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
408 						   vb);
409 	const struct v4l2_pix_format_mplane *format =
410 						&video->active_fmt.fmt.pix_mp;
411 	struct sg_table *sgt;
412 	unsigned int i;
413 
414 	for (i = 0; i < format->num_planes; i++) {
415 		sgt = vb2_dma_sg_plane_desc(vb, i);
416 		if (!sgt)
417 			return -EFAULT;
418 
419 		buffer->addr[i] = sg_dma_address(sgt->sgl);
420 	}
421 
422 	if (format->pixelformat == V4L2_PIX_FMT_NV12 ||
423 			format->pixelformat == V4L2_PIX_FMT_NV21 ||
424 			format->pixelformat == V4L2_PIX_FMT_NV16 ||
425 			format->pixelformat == V4L2_PIX_FMT_NV61)
426 		buffer->addr[1] = buffer->addr[0] +
427 				format->plane_fmt[0].bytesperline *
428 				format->height;
429 
430 	return 0;
431 }
432 
video_buf_prepare(struct vb2_buffer * vb)433 static int video_buf_prepare(struct vb2_buffer *vb)
434 {
435 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
436 	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
437 	const struct v4l2_pix_format_mplane *format =
438 						&video->active_fmt.fmt.pix_mp;
439 	unsigned int i;
440 
441 	for (i = 0; i < format->num_planes; i++) {
442 		if (format->plane_fmt[i].sizeimage > vb2_plane_size(vb, i))
443 			return -EINVAL;
444 
445 		vb2_set_plane_payload(vb, i, format->plane_fmt[i].sizeimage);
446 	}
447 
448 	vbuf->field = V4L2_FIELD_NONE;
449 
450 	return 0;
451 }
452 
video_buf_queue(struct vb2_buffer * vb)453 static void video_buf_queue(struct vb2_buffer *vb)
454 {
455 	struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
456 	struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue);
457 	struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer,
458 						   vb);
459 
460 	video->ops->queue_buffer(video, buffer);
461 }
462 
video_check_format(struct camss_video * video)463 static int video_check_format(struct camss_video *video)
464 {
465 	struct v4l2_pix_format_mplane *pix = &video->active_fmt.fmt.pix_mp;
466 	struct v4l2_format format;
467 	struct v4l2_pix_format_mplane *sd_pix = &format.fmt.pix_mp;
468 	int ret;
469 
470 	sd_pix->pixelformat = pix->pixelformat;
471 	ret = video_get_subdev_format(video, &format);
472 	if (ret < 0)
473 		return ret;
474 
475 	if (pix->pixelformat != sd_pix->pixelformat ||
476 	    pix->height != sd_pix->height ||
477 	    pix->width != sd_pix->width ||
478 	    pix->num_planes != sd_pix->num_planes ||
479 	    pix->field != format.fmt.pix_mp.field)
480 		return -EPIPE;
481 
482 	return 0;
483 }
484 
video_start_streaming(struct vb2_queue * q,unsigned int count)485 static int video_start_streaming(struct vb2_queue *q, unsigned int count)
486 {
487 	struct camss_video *video = vb2_get_drv_priv(q);
488 	struct video_device *vdev = &video->vdev;
489 	struct media_entity *entity;
490 	struct media_pad *pad;
491 	struct v4l2_subdev *subdev;
492 	int ret;
493 
494 	ret = media_pipeline_start(&vdev->entity, &video->pipe);
495 	if (ret < 0)
496 		return ret;
497 
498 	ret = video_check_format(video);
499 	if (ret < 0)
500 		goto error;
501 
502 	entity = &vdev->entity;
503 	while (1) {
504 		pad = &entity->pads[0];
505 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
506 			break;
507 
508 		pad = media_entity_remote_pad(pad);
509 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
510 			break;
511 
512 		entity = pad->entity;
513 		subdev = media_entity_to_v4l2_subdev(entity);
514 
515 		ret = v4l2_subdev_call(subdev, video, s_stream, 1);
516 		if (ret < 0 && ret != -ENOIOCTLCMD)
517 			goto error;
518 	}
519 
520 	return 0;
521 
522 error:
523 	media_pipeline_stop(&vdev->entity);
524 
525 	video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED);
526 
527 	return ret;
528 }
529 
video_stop_streaming(struct vb2_queue * q)530 static void video_stop_streaming(struct vb2_queue *q)
531 {
532 	struct camss_video *video = vb2_get_drv_priv(q);
533 	struct video_device *vdev = &video->vdev;
534 	struct media_entity *entity;
535 	struct media_pad *pad;
536 	struct v4l2_subdev *subdev;
537 
538 	entity = &vdev->entity;
539 	while (1) {
540 		pad = &entity->pads[0];
541 		if (!(pad->flags & MEDIA_PAD_FL_SINK))
542 			break;
543 
544 		pad = media_entity_remote_pad(pad);
545 		if (!pad || !is_media_entity_v4l2_subdev(pad->entity))
546 			break;
547 
548 		entity = pad->entity;
549 		subdev = media_entity_to_v4l2_subdev(entity);
550 
551 		v4l2_subdev_call(subdev, video, s_stream, 0);
552 	}
553 
554 	media_pipeline_stop(&vdev->entity);
555 
556 	video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR);
557 }
558 
559 static const struct vb2_ops msm_video_vb2_q_ops = {
560 	.queue_setup     = video_queue_setup,
561 	.wait_prepare    = vb2_ops_wait_prepare,
562 	.wait_finish     = vb2_ops_wait_finish,
563 	.buf_init        = video_buf_init,
564 	.buf_prepare     = video_buf_prepare,
565 	.buf_queue       = video_buf_queue,
566 	.start_streaming = video_start_streaming,
567 	.stop_streaming  = video_stop_streaming,
568 };
569 
570 /* -----------------------------------------------------------------------------
571  * V4L2 ioctls
572  */
573 
video_querycap(struct file * file,void * fh,struct v4l2_capability * cap)574 static int video_querycap(struct file *file, void *fh,
575 			  struct v4l2_capability *cap)
576 {
577 	struct camss_video *video = video_drvdata(file);
578 
579 	strscpy(cap->driver, "qcom-camss", sizeof(cap->driver));
580 	strscpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card));
581 	snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
582 		 dev_name(video->camss->dev));
583 
584 	return 0;
585 }
586 
video_enum_fmt(struct file * file,void * fh,struct v4l2_fmtdesc * f)587 static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f)
588 {
589 	struct camss_video *video = video_drvdata(file);
590 	int i, j, k;
591 	u32 mcode = f->mbus_code;
592 
593 	if (f->type != video->type)
594 		return -EINVAL;
595 
596 	if (f->index >= video->nformats)
597 		return -EINVAL;
598 
599 	/*
600 	 * Find index "i" of "k"th unique pixelformat in formats array.
601 	 *
602 	 * If f->mbus_code passed to video_enum_fmt() is not zero, a device
603 	 * with V4L2_CAP_IO_MC capability restricts enumeration to only the
604 	 * pixel formats that can be produced from that media bus code.
605 	 * This is implemented by skipping video->formats[] entries with
606 	 * code != f->mbus_code (if f->mbus_code is not zero).
607 	 * If the f->mbus_code passed to video_enum_fmt() is not supported,
608 	 * -EINVAL is returned.
609 	 * If f->mbus_code is zero, all the pixel formats are enumerated.
610 	 */
611 	k = -1;
612 	for (i = 0; i < video->nformats; i++) {
613 		if (mcode != 0 && video->formats[i].code != mcode)
614 			continue;
615 
616 		for (j = 0; j < i; j++) {
617 			if (mcode != 0 && video->formats[j].code != mcode)
618 				continue;
619 			if (video->formats[i].pixelformat ==
620 					video->formats[j].pixelformat)
621 				break;
622 		}
623 
624 		if (j == i)
625 			k++;
626 
627 		if (k == f->index)
628 			break;
629 	}
630 
631 	if (k == -1 || k < f->index)
632 		/*
633 		 * All the unique pixel formats matching the arguments
634 		 * have been enumerated (k >= 0 and f->index > 0), or
635 		 * no pixel formats match the non-zero f->mbus_code (k == -1).
636 		 */
637 		return -EINVAL;
638 
639 	f->pixelformat = video->formats[i].pixelformat;
640 
641 	return 0;
642 }
643 
video_enum_framesizes(struct file * file,void * fh,struct v4l2_frmsizeenum * fsize)644 static int video_enum_framesizes(struct file *file, void *fh,
645 				 struct v4l2_frmsizeenum *fsize)
646 {
647 	struct camss_video *video = video_drvdata(file);
648 	int i;
649 
650 	if (fsize->index)
651 		return -EINVAL;
652 
653 	/* Only accept pixel format present in the formats[] table */
654 	for (i = 0; i < video->nformats; i++) {
655 		if (video->formats[i].pixelformat == fsize->pixel_format)
656 			break;
657 	}
658 
659 	if (i == video->nformats)
660 		return -EINVAL;
661 
662 	fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS;
663 	fsize->stepwise.min_width = CAMSS_FRAME_MIN_WIDTH;
664 	fsize->stepwise.max_width = CAMSS_FRAME_MAX_WIDTH;
665 	fsize->stepwise.min_height = CAMSS_FRAME_MIN_HEIGHT;
666 	fsize->stepwise.max_height = (video->line_based) ?
667 		CAMSS_FRAME_MAX_HEIGHT_PIX : CAMSS_FRAME_MAX_HEIGHT_RDI;
668 	fsize->stepwise.step_width = 1;
669 	fsize->stepwise.step_height = 1;
670 
671 	return 0;
672 }
673 
video_g_fmt(struct file * file,void * fh,struct v4l2_format * f)674 static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f)
675 {
676 	struct camss_video *video = video_drvdata(file);
677 
678 	*f = video->active_fmt;
679 
680 	return 0;
681 }
682 
__video_try_fmt(struct camss_video * video,struct v4l2_format * f)683 static int __video_try_fmt(struct camss_video *video, struct v4l2_format *f)
684 {
685 	struct v4l2_pix_format_mplane *pix_mp;
686 	const struct camss_format_info *fi;
687 	struct v4l2_plane_pix_format *p;
688 	u32 bytesperline[3] = { 0 };
689 	u32 sizeimage[3] = { 0 };
690 	u32 width, height;
691 	u32 bpl, lines;
692 	int i, j;
693 
694 	pix_mp = &f->fmt.pix_mp;
695 
696 	if (video->line_based)
697 		for (i = 0; i < pix_mp->num_planes && i < 3; i++) {
698 			p = &pix_mp->plane_fmt[i];
699 			bytesperline[i] = clamp_t(u32, p->bytesperline,
700 						  1, 65528);
701 			sizeimage[i] = clamp_t(u32, p->sizeimage,
702 					       bytesperline[i],
703 					       bytesperline[i] * CAMSS_FRAME_MAX_HEIGHT_PIX);
704 		}
705 
706 	for (j = 0; j < video->nformats; j++)
707 		if (pix_mp->pixelformat == video->formats[j].pixelformat)
708 			break;
709 
710 	if (j == video->nformats)
711 		j = 0; /* default format */
712 
713 	fi = &video->formats[j];
714 	width = pix_mp->width;
715 	height = pix_mp->height;
716 
717 	memset(pix_mp, 0, sizeof(*pix_mp));
718 
719 	pix_mp->pixelformat = fi->pixelformat;
720 	pix_mp->width = clamp_t(u32, width, 1, CAMSS_FRAME_MAX_WIDTH);
721 	pix_mp->height = clamp_t(u32, height, 1, CAMSS_FRAME_MAX_HEIGHT_RDI);
722 	pix_mp->num_planes = fi->planes;
723 	for (i = 0; i < pix_mp->num_planes; i++) {
724 		bpl = pix_mp->width / fi->hsub[i].numerator *
725 			fi->hsub[i].denominator * fi->bpp[i] / 8;
726 		bpl = ALIGN(bpl, video->bpl_alignment);
727 		pix_mp->plane_fmt[i].bytesperline = bpl;
728 		pix_mp->plane_fmt[i].sizeimage = pix_mp->height /
729 			fi->vsub[i].numerator * fi->vsub[i].denominator * bpl;
730 	}
731 
732 	pix_mp->field = V4L2_FIELD_NONE;
733 	pix_mp->colorspace = V4L2_COLORSPACE_SRGB;
734 	pix_mp->flags = 0;
735 	pix_mp->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_mp->colorspace);
736 	pix_mp->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true,
737 					pix_mp->colorspace, pix_mp->ycbcr_enc);
738 	pix_mp->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_mp->colorspace);
739 
740 	if (video->line_based)
741 		for (i = 0; i < pix_mp->num_planes; i++) {
742 			p = &pix_mp->plane_fmt[i];
743 			p->bytesperline = clamp_t(u32, p->bytesperline,
744 						  1, 65528);
745 			p->sizeimage = clamp_t(u32, p->sizeimage,
746 					       p->bytesperline,
747 					       p->bytesperline * CAMSS_FRAME_MAX_HEIGHT_PIX);
748 			lines = p->sizeimage / p->bytesperline;
749 
750 			if (p->bytesperline < bytesperline[i])
751 				p->bytesperline = ALIGN(bytesperline[i], 8);
752 
753 			if (p->sizeimage < p->bytesperline * lines)
754 				p->sizeimage = p->bytesperline * lines;
755 
756 			if (p->sizeimage < sizeimage[i])
757 				p->sizeimage = sizeimage[i];
758 		}
759 
760 	return 0;
761 }
762 
video_try_fmt(struct file * file,void * fh,struct v4l2_format * f)763 static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f)
764 {
765 	struct camss_video *video = video_drvdata(file);
766 
767 	return __video_try_fmt(video, f);
768 }
769 
video_s_fmt(struct file * file,void * fh,struct v4l2_format * f)770 static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f)
771 {
772 	struct camss_video *video = video_drvdata(file);
773 	int ret;
774 
775 	if (vb2_is_busy(&video->vb2_q))
776 		return -EBUSY;
777 
778 	ret = __video_try_fmt(video, f);
779 	if (ret < 0)
780 		return ret;
781 
782 	video->active_fmt = *f;
783 
784 	return 0;
785 }
786 
video_enum_input(struct file * file,void * fh,struct v4l2_input * input)787 static int video_enum_input(struct file *file, void *fh,
788 			    struct v4l2_input *input)
789 {
790 	if (input->index > 0)
791 		return -EINVAL;
792 
793 	strscpy(input->name, "camera", sizeof(input->name));
794 	input->type = V4L2_INPUT_TYPE_CAMERA;
795 
796 	return 0;
797 }
798 
video_g_input(struct file * file,void * fh,unsigned int * input)799 static int video_g_input(struct file *file, void *fh, unsigned int *input)
800 {
801 	*input = 0;
802 
803 	return 0;
804 }
805 
video_s_input(struct file * file,void * fh,unsigned int input)806 static int video_s_input(struct file *file, void *fh, unsigned int input)
807 {
808 	return input == 0 ? 0 : -EINVAL;
809 }
810 
811 static const struct v4l2_ioctl_ops msm_vid_ioctl_ops = {
812 	.vidioc_querycap		= video_querycap,
813 	.vidioc_enum_fmt_vid_cap	= video_enum_fmt,
814 	.vidioc_enum_framesizes		= video_enum_framesizes,
815 	.vidioc_g_fmt_vid_cap_mplane	= video_g_fmt,
816 	.vidioc_s_fmt_vid_cap_mplane	= video_s_fmt,
817 	.vidioc_try_fmt_vid_cap_mplane	= video_try_fmt,
818 	.vidioc_reqbufs			= vb2_ioctl_reqbufs,
819 	.vidioc_querybuf		= vb2_ioctl_querybuf,
820 	.vidioc_qbuf			= vb2_ioctl_qbuf,
821 	.vidioc_expbuf			= vb2_ioctl_expbuf,
822 	.vidioc_dqbuf			= vb2_ioctl_dqbuf,
823 	.vidioc_create_bufs		= vb2_ioctl_create_bufs,
824 	.vidioc_prepare_buf		= vb2_ioctl_prepare_buf,
825 	.vidioc_streamon		= vb2_ioctl_streamon,
826 	.vidioc_streamoff		= vb2_ioctl_streamoff,
827 	.vidioc_enum_input		= video_enum_input,
828 	.vidioc_g_input			= video_g_input,
829 	.vidioc_s_input			= video_s_input,
830 };
831 
832 /* -----------------------------------------------------------------------------
833  * V4L2 file operations
834  */
835 
video_open(struct file * file)836 static int video_open(struct file *file)
837 {
838 	struct video_device *vdev = video_devdata(file);
839 	struct camss_video *video = video_drvdata(file);
840 	struct v4l2_fh *vfh;
841 	int ret;
842 
843 	mutex_lock(&video->lock);
844 
845 	vfh = kzalloc(sizeof(*vfh), GFP_KERNEL);
846 	if (vfh == NULL) {
847 		ret = -ENOMEM;
848 		goto error_alloc;
849 	}
850 
851 	v4l2_fh_init(vfh, vdev);
852 	v4l2_fh_add(vfh);
853 
854 	file->private_data = vfh;
855 
856 	ret = v4l2_pipeline_pm_get(&vdev->entity);
857 	if (ret < 0) {
858 		dev_err(video->camss->dev, "Failed to power up pipeline: %d\n",
859 			ret);
860 		goto error_pm_use;
861 	}
862 
863 	mutex_unlock(&video->lock);
864 
865 	return 0;
866 
867 error_pm_use:
868 	v4l2_fh_release(file);
869 
870 error_alloc:
871 	mutex_unlock(&video->lock);
872 
873 	return ret;
874 }
875 
video_release(struct file * file)876 static int video_release(struct file *file)
877 {
878 	struct video_device *vdev = video_devdata(file);
879 
880 	vb2_fop_release(file);
881 
882 	v4l2_pipeline_pm_put(&vdev->entity);
883 
884 	file->private_data = NULL;
885 
886 	return 0;
887 }
888 
889 static const struct v4l2_file_operations msm_vid_fops = {
890 	.owner          = THIS_MODULE,
891 	.unlocked_ioctl = video_ioctl2,
892 	.open           = video_open,
893 	.release        = video_release,
894 	.poll           = vb2_fop_poll,
895 	.mmap		= vb2_fop_mmap,
896 	.read		= vb2_fop_read,
897 };
898 
899 /* -----------------------------------------------------------------------------
900  * CAMSS video core
901  */
902 
msm_video_release(struct video_device * vdev)903 static void msm_video_release(struct video_device *vdev)
904 {
905 	struct camss_video *video = video_get_drvdata(vdev);
906 
907 	media_entity_cleanup(&vdev->entity);
908 
909 	mutex_destroy(&video->q_lock);
910 	mutex_destroy(&video->lock);
911 
912 	if (atomic_dec_and_test(&video->camss->ref_count))
913 		camss_delete(video->camss);
914 }
915 
916 /*
917  * msm_video_init_format - Helper function to initialize format
918  * @video: struct camss_video
919  *
920  * Initialize pad format with default value.
921  *
922  * Return 0 on success or a negative error code otherwise
923  */
msm_video_init_format(struct camss_video * video)924 static int msm_video_init_format(struct camss_video *video)
925 {
926 	int ret;
927 	struct v4l2_format format = {
928 		.type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE,
929 		.fmt.pix_mp = {
930 			.width = 1920,
931 			.height = 1080,
932 			.pixelformat = video->formats[0].pixelformat,
933 		},
934 	};
935 
936 	ret = __video_try_fmt(video, &format);
937 	if (ret < 0)
938 		return ret;
939 
940 	video->active_fmt = format;
941 
942 	return 0;
943 }
944 
945 /*
946  * msm_video_register - Register a video device node
947  * @video: struct camss_video
948  * @v4l2_dev: V4L2 device
949  * @name: name to be used for the video device node
950  *
951  * Initialize and register a video device node to a V4L2 device. Also
952  * initialize the vb2 queue.
953  *
954  * Return 0 on success or a negative error code otherwise
955  */
956 
msm_video_register(struct camss_video * video,struct v4l2_device * v4l2_dev,const char * name,int is_pix)957 int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev,
958 		       const char *name, int is_pix)
959 {
960 	struct media_pad *pad = &video->pad;
961 	struct video_device *vdev;
962 	struct vb2_queue *q;
963 	int ret;
964 
965 	vdev = &video->vdev;
966 
967 	mutex_init(&video->q_lock);
968 
969 	q = &video->vb2_q;
970 	q->drv_priv = video;
971 	q->mem_ops = &vb2_dma_sg_memops;
972 	q->ops = &msm_video_vb2_q_ops;
973 	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
974 	q->io_modes = VB2_DMABUF | VB2_MMAP | VB2_READ;
975 	q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC;
976 	q->buf_struct_size = sizeof(struct camss_buffer);
977 	q->dev = video->camss->dev;
978 	q->lock = &video->q_lock;
979 	ret = vb2_queue_init(q);
980 	if (ret < 0) {
981 		dev_err(v4l2_dev->dev, "Failed to init vb2 queue: %d\n", ret);
982 		goto error_vb2_init;
983 	}
984 
985 	pad->flags = MEDIA_PAD_FL_SINK;
986 	ret = media_entity_pads_init(&vdev->entity, 1, pad);
987 	if (ret < 0) {
988 		dev_err(v4l2_dev->dev, "Failed to init video entity: %d\n",
989 			ret);
990 		goto error_vb2_init;
991 	}
992 
993 	mutex_init(&video->lock);
994 
995 	if (video->camss->version == CAMSS_8x16) {
996 		if (is_pix) {
997 			video->formats = formats_pix_8x16;
998 			video->nformats = ARRAY_SIZE(formats_pix_8x16);
999 		} else {
1000 			video->formats = formats_rdi_8x16;
1001 			video->nformats = ARRAY_SIZE(formats_rdi_8x16);
1002 		}
1003 	} else if (video->camss->version == CAMSS_8x96 ||
1004 		   video->camss->version == CAMSS_660) {
1005 		if (is_pix) {
1006 			video->formats = formats_pix_8x96;
1007 			video->nformats = ARRAY_SIZE(formats_pix_8x96);
1008 		} else {
1009 			video->formats = formats_rdi_8x96;
1010 			video->nformats = ARRAY_SIZE(formats_rdi_8x96);
1011 		}
1012 	}  else if (video->camss->version == CAMSS_845) {
1013 		video->formats = formats_rdi_845;
1014 		video->nformats = ARRAY_SIZE(formats_rdi_845);
1015 	} else {
1016 		ret = -EINVAL;
1017 		goto error_video_register;
1018 	}
1019 
1020 	ret = msm_video_init_format(video);
1021 	if (ret < 0) {
1022 		dev_err(v4l2_dev->dev, "Failed to init format: %d\n", ret);
1023 		goto error_video_register;
1024 	}
1025 
1026 	vdev->fops = &msm_vid_fops;
1027 	vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING
1028 			  | V4L2_CAP_READWRITE | V4L2_CAP_IO_MC;
1029 	vdev->ioctl_ops = &msm_vid_ioctl_ops;
1030 	vdev->release = msm_video_release;
1031 	vdev->v4l2_dev = v4l2_dev;
1032 	vdev->vfl_dir = VFL_DIR_RX;
1033 	vdev->queue = &video->vb2_q;
1034 	vdev->lock = &video->lock;
1035 	strscpy(vdev->name, name, sizeof(vdev->name));
1036 
1037 	ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1);
1038 	if (ret < 0) {
1039 		dev_err(v4l2_dev->dev, "Failed to register video device: %d\n",
1040 			ret);
1041 		goto error_video_register;
1042 	}
1043 
1044 	video_set_drvdata(vdev, video);
1045 	atomic_inc(&video->camss->ref_count);
1046 
1047 	return 0;
1048 
1049 error_video_register:
1050 	media_entity_cleanup(&vdev->entity);
1051 	mutex_destroy(&video->lock);
1052 error_vb2_init:
1053 	mutex_destroy(&video->q_lock);
1054 
1055 	return ret;
1056 }
1057 
msm_video_unregister(struct camss_video * video)1058 void msm_video_unregister(struct camss_video *video)
1059 {
1060 	atomic_inc(&video->camss->ref_count);
1061 	vb2_video_unregister_device(&video->vdev);
1062 	atomic_dec(&video->camss->ref_count);
1063 }
1064