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_Y8_1X8, V4L2_PIX_FMT_GREY, 1, 180 { { 1, 1 } }, { { 1, 1 } }, { 8 } }, 181 { MEDIA_BUS_FMT_Y10_1X10, V4L2_PIX_FMT_Y10P, 1, 182 { { 1, 1 } }, { { 1, 1 } }, { 10 } }, 183 { MEDIA_BUS_FMT_Y10_2X8_PADHI_LE, V4L2_PIX_FMT_Y10, 1, 184 { { 1, 1 } }, { { 1, 1 } }, { 16 } }, 185 }; 186 187 static const struct camss_format_info formats_pix_8x16[] = { 188 { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1, 189 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 190 { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1, 191 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 192 { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1, 193 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 194 { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1, 195 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 196 { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1, 197 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 198 { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1, 199 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 200 { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1, 201 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 202 { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1, 203 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 204 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1, 205 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 206 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1, 207 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 208 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1, 209 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 210 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1, 211 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 212 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1, 213 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 214 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1, 215 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 216 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1, 217 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 218 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1, 219 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 220 }; 221 222 static const struct camss_format_info formats_pix_8x96[] = { 223 { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV12, 1, 224 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 225 { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV12, 1, 226 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 227 { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV12, 1, 228 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 229 { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV12, 1, 230 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 231 { MEDIA_BUS_FMT_YUYV8_1_5X8, V4L2_PIX_FMT_NV21, 1, 232 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 233 { MEDIA_BUS_FMT_YVYU8_1_5X8, V4L2_PIX_FMT_NV21, 1, 234 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 235 { MEDIA_BUS_FMT_UYVY8_1_5X8, V4L2_PIX_FMT_NV21, 1, 236 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 237 { MEDIA_BUS_FMT_VYUY8_1_5X8, V4L2_PIX_FMT_NV21, 1, 238 { { 1, 1 } }, { { 2, 3 } }, { 8 } }, 239 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV16, 1, 240 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 241 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV16, 1, 242 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 243 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV16, 1, 244 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 245 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV16, 1, 246 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 247 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_NV61, 1, 248 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 249 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_NV61, 1, 250 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 251 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_NV61, 1, 252 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 253 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_NV61, 1, 254 { { 1, 1 } }, { { 1, 2 } }, { 8 } }, 255 { MEDIA_BUS_FMT_UYVY8_2X8, V4L2_PIX_FMT_UYVY, 1, 256 { { 1, 1 } }, { { 1, 1 } }, { 16 } }, 257 { MEDIA_BUS_FMT_VYUY8_2X8, V4L2_PIX_FMT_VYUY, 1, 258 { { 1, 1 } }, { { 1, 1 } }, { 16 } }, 259 { MEDIA_BUS_FMT_YUYV8_2X8, V4L2_PIX_FMT_YUYV, 1, 260 { { 1, 1 } }, { { 1, 1 } }, { 16 } }, 261 { MEDIA_BUS_FMT_YVYU8_2X8, V4L2_PIX_FMT_YVYU, 1, 262 { { 1, 1 } }, { { 1, 1 } }, { 16 } }, 263 }; 264 265 /* ----------------------------------------------------------------------------- 266 * Helper functions 267 */ 268 269 static int video_find_format(u32 code, u32 pixelformat, 270 const struct camss_format_info *formats, 271 unsigned int nformats) 272 { 273 int i; 274 275 for (i = 0; i < nformats; i++) { 276 if (formats[i].code == code && 277 formats[i].pixelformat == pixelformat) 278 return i; 279 } 280 281 for (i = 0; i < nformats; i++) 282 if (formats[i].code == code) 283 return i; 284 285 WARN_ON(1); 286 287 return -EINVAL; 288 } 289 290 /* 291 * video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane 292 * @mbus: v4l2_mbus_framefmt format (input) 293 * @pix: v4l2_pix_format_mplane format (output) 294 * @f: a pointer to formats array element to be used for the conversion 295 * @alignment: bytesperline alignment value 296 * 297 * Fill the output pix structure with information from the input mbus format. 298 * 299 * Return 0 on success or a negative error code otherwise 300 */ 301 static int video_mbus_to_pix_mp(const struct v4l2_mbus_framefmt *mbus, 302 struct v4l2_pix_format_mplane *pix, 303 const struct camss_format_info *f, 304 unsigned int alignment) 305 { 306 unsigned int i; 307 u32 bytesperline; 308 309 memset(pix, 0, sizeof(*pix)); 310 v4l2_fill_pix_format_mplane(pix, mbus); 311 pix->pixelformat = f->pixelformat; 312 pix->num_planes = f->planes; 313 for (i = 0; i < pix->num_planes; i++) { 314 bytesperline = pix->width / f->hsub[i].numerator * 315 f->hsub[i].denominator * f->bpp[i] / 8; 316 bytesperline = ALIGN(bytesperline, alignment); 317 pix->plane_fmt[i].bytesperline = bytesperline; 318 pix->plane_fmt[i].sizeimage = pix->height / 319 f->vsub[i].numerator * f->vsub[i].denominator * 320 bytesperline; 321 } 322 323 return 0; 324 } 325 326 static struct v4l2_subdev *video_remote_subdev(struct camss_video *video, 327 u32 *pad) 328 { 329 struct media_pad *remote; 330 331 remote = media_entity_remote_pad(&video->pad); 332 333 if (!remote || !is_media_entity_v4l2_subdev(remote->entity)) 334 return NULL; 335 336 if (pad) 337 *pad = remote->index; 338 339 return media_entity_to_v4l2_subdev(remote->entity); 340 } 341 342 static int video_get_subdev_format(struct camss_video *video, 343 struct v4l2_format *format) 344 { 345 struct v4l2_subdev_format fmt; 346 struct v4l2_subdev *subdev; 347 u32 pad; 348 int ret; 349 350 subdev = video_remote_subdev(video, &pad); 351 if (subdev == NULL) 352 return -EPIPE; 353 354 fmt.pad = pad; 355 fmt.which = V4L2_SUBDEV_FORMAT_ACTIVE; 356 357 ret = v4l2_subdev_call(subdev, pad, get_fmt, NULL, &fmt); 358 if (ret) 359 return ret; 360 361 ret = video_find_format(fmt.format.code, 362 format->fmt.pix_mp.pixelformat, 363 video->formats, video->nformats); 364 if (ret < 0) 365 return ret; 366 367 format->type = video->type; 368 369 return video_mbus_to_pix_mp(&fmt.format, &format->fmt.pix_mp, 370 &video->formats[ret], video->bpl_alignment); 371 } 372 373 /* ----------------------------------------------------------------------------- 374 * Video queue operations 375 */ 376 377 static int video_queue_setup(struct vb2_queue *q, 378 unsigned int *num_buffers, unsigned int *num_planes, 379 unsigned int sizes[], struct device *alloc_devs[]) 380 { 381 struct camss_video *video = vb2_get_drv_priv(q); 382 const struct v4l2_pix_format_mplane *format = 383 &video->active_fmt.fmt.pix_mp; 384 unsigned int i; 385 386 if (*num_planes) { 387 if (*num_planes != format->num_planes) 388 return -EINVAL; 389 390 for (i = 0; i < *num_planes; i++) 391 if (sizes[i] < format->plane_fmt[i].sizeimage) 392 return -EINVAL; 393 394 return 0; 395 } 396 397 *num_planes = format->num_planes; 398 399 for (i = 0; i < *num_planes; i++) 400 sizes[i] = format->plane_fmt[i].sizeimage; 401 402 return 0; 403 } 404 405 static int video_buf_init(struct vb2_buffer *vb) 406 { 407 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 408 struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue); 409 struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer, 410 vb); 411 const struct v4l2_pix_format_mplane *format = 412 &video->active_fmt.fmt.pix_mp; 413 struct sg_table *sgt; 414 unsigned int i; 415 416 for (i = 0; i < format->num_planes; i++) { 417 sgt = vb2_dma_sg_plane_desc(vb, i); 418 if (!sgt) 419 return -EFAULT; 420 421 buffer->addr[i] = sg_dma_address(sgt->sgl); 422 } 423 424 if (format->pixelformat == V4L2_PIX_FMT_NV12 || 425 format->pixelformat == V4L2_PIX_FMT_NV21 || 426 format->pixelformat == V4L2_PIX_FMT_NV16 || 427 format->pixelformat == V4L2_PIX_FMT_NV61) 428 buffer->addr[1] = buffer->addr[0] + 429 format->plane_fmt[0].bytesperline * 430 format->height; 431 432 return 0; 433 } 434 435 static int video_buf_prepare(struct vb2_buffer *vb) 436 { 437 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 438 struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue); 439 const struct v4l2_pix_format_mplane *format = 440 &video->active_fmt.fmt.pix_mp; 441 unsigned int i; 442 443 for (i = 0; i < format->num_planes; i++) { 444 if (format->plane_fmt[i].sizeimage > vb2_plane_size(vb, i)) 445 return -EINVAL; 446 447 vb2_set_plane_payload(vb, i, format->plane_fmt[i].sizeimage); 448 } 449 450 vbuf->field = V4L2_FIELD_NONE; 451 452 return 0; 453 } 454 455 static void video_buf_queue(struct vb2_buffer *vb) 456 { 457 struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); 458 struct camss_video *video = vb2_get_drv_priv(vb->vb2_queue); 459 struct camss_buffer *buffer = container_of(vbuf, struct camss_buffer, 460 vb); 461 462 video->ops->queue_buffer(video, buffer); 463 } 464 465 static int video_check_format(struct camss_video *video) 466 { 467 struct v4l2_pix_format_mplane *pix = &video->active_fmt.fmt.pix_mp; 468 struct v4l2_format format; 469 struct v4l2_pix_format_mplane *sd_pix = &format.fmt.pix_mp; 470 int ret; 471 472 sd_pix->pixelformat = pix->pixelformat; 473 ret = video_get_subdev_format(video, &format); 474 if (ret < 0) 475 return ret; 476 477 if (pix->pixelformat != sd_pix->pixelformat || 478 pix->height != sd_pix->height || 479 pix->width != sd_pix->width || 480 pix->num_planes != sd_pix->num_planes || 481 pix->field != format.fmt.pix_mp.field) 482 return -EPIPE; 483 484 return 0; 485 } 486 487 static int video_start_streaming(struct vb2_queue *q, unsigned int count) 488 { 489 struct camss_video *video = vb2_get_drv_priv(q); 490 struct video_device *vdev = &video->vdev; 491 struct media_entity *entity; 492 struct media_pad *pad; 493 struct v4l2_subdev *subdev; 494 int ret; 495 496 ret = media_pipeline_start(&vdev->entity, &video->pipe); 497 if (ret < 0) 498 return ret; 499 500 ret = video_check_format(video); 501 if (ret < 0) 502 goto error; 503 504 entity = &vdev->entity; 505 while (1) { 506 pad = &entity->pads[0]; 507 if (!(pad->flags & MEDIA_PAD_FL_SINK)) 508 break; 509 510 pad = media_entity_remote_pad(pad); 511 if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) 512 break; 513 514 entity = pad->entity; 515 subdev = media_entity_to_v4l2_subdev(entity); 516 517 ret = v4l2_subdev_call(subdev, video, s_stream, 1); 518 if (ret < 0 && ret != -ENOIOCTLCMD) 519 goto error; 520 } 521 522 return 0; 523 524 error: 525 media_pipeline_stop(&vdev->entity); 526 527 video->ops->flush_buffers(video, VB2_BUF_STATE_QUEUED); 528 529 return ret; 530 } 531 532 static void video_stop_streaming(struct vb2_queue *q) 533 { 534 struct camss_video *video = vb2_get_drv_priv(q); 535 struct video_device *vdev = &video->vdev; 536 struct media_entity *entity; 537 struct media_pad *pad; 538 struct v4l2_subdev *subdev; 539 540 entity = &vdev->entity; 541 while (1) { 542 pad = &entity->pads[0]; 543 if (!(pad->flags & MEDIA_PAD_FL_SINK)) 544 break; 545 546 pad = media_entity_remote_pad(pad); 547 if (!pad || !is_media_entity_v4l2_subdev(pad->entity)) 548 break; 549 550 entity = pad->entity; 551 subdev = media_entity_to_v4l2_subdev(entity); 552 553 v4l2_subdev_call(subdev, video, s_stream, 0); 554 } 555 556 media_pipeline_stop(&vdev->entity); 557 558 video->ops->flush_buffers(video, VB2_BUF_STATE_ERROR); 559 } 560 561 static const struct vb2_ops msm_video_vb2_q_ops = { 562 .queue_setup = video_queue_setup, 563 .wait_prepare = vb2_ops_wait_prepare, 564 .wait_finish = vb2_ops_wait_finish, 565 .buf_init = video_buf_init, 566 .buf_prepare = video_buf_prepare, 567 .buf_queue = video_buf_queue, 568 .start_streaming = video_start_streaming, 569 .stop_streaming = video_stop_streaming, 570 }; 571 572 /* ----------------------------------------------------------------------------- 573 * V4L2 ioctls 574 */ 575 576 static int video_querycap(struct file *file, void *fh, 577 struct v4l2_capability *cap) 578 { 579 struct camss_video *video = video_drvdata(file); 580 581 strscpy(cap->driver, "qcom-camss", sizeof(cap->driver)); 582 strscpy(cap->card, "Qualcomm Camera Subsystem", sizeof(cap->card)); 583 snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s", 584 dev_name(video->camss->dev)); 585 586 return 0; 587 } 588 589 static int video_enum_fmt(struct file *file, void *fh, struct v4l2_fmtdesc *f) 590 { 591 struct camss_video *video = video_drvdata(file); 592 int i, j, k; 593 u32 mcode = f->mbus_code; 594 595 if (f->type != video->type) 596 return -EINVAL; 597 598 if (f->index >= video->nformats) 599 return -EINVAL; 600 601 /* 602 * Find index "i" of "k"th unique pixelformat in formats array. 603 * 604 * If f->mbus_code passed to video_enum_fmt() is not zero, a device 605 * with V4L2_CAP_IO_MC capability restricts enumeration to only the 606 * pixel formats that can be produced from that media bus code. 607 * This is implemented by skipping video->formats[] entries with 608 * code != f->mbus_code (if f->mbus_code is not zero). 609 * If the f->mbus_code passed to video_enum_fmt() is not supported, 610 * -EINVAL is returned. 611 * If f->mbus_code is zero, all the pixel formats are enumerated. 612 */ 613 k = -1; 614 for (i = 0; i < video->nformats; i++) { 615 if (mcode != 0 && video->formats[i].code != mcode) 616 continue; 617 618 for (j = 0; j < i; j++) { 619 if (mcode != 0 && video->formats[j].code != mcode) 620 continue; 621 if (video->formats[i].pixelformat == 622 video->formats[j].pixelformat) 623 break; 624 } 625 626 if (j == i) 627 k++; 628 629 if (k == f->index) 630 break; 631 } 632 633 if (k == -1 || k < f->index) 634 /* 635 * All the unique pixel formats matching the arguments 636 * have been enumerated (k >= 0 and f->index > 0), or 637 * no pixel formats match the non-zero f->mbus_code (k == -1). 638 */ 639 return -EINVAL; 640 641 f->pixelformat = video->formats[i].pixelformat; 642 643 return 0; 644 } 645 646 static int video_enum_framesizes(struct file *file, void *fh, 647 struct v4l2_frmsizeenum *fsize) 648 { 649 struct camss_video *video = video_drvdata(file); 650 int i; 651 652 if (fsize->index) 653 return -EINVAL; 654 655 /* Only accept pixel format present in the formats[] table */ 656 for (i = 0; i < video->nformats; i++) { 657 if (video->formats[i].pixelformat == fsize->pixel_format) 658 break; 659 } 660 661 if (i == video->nformats) 662 return -EINVAL; 663 664 fsize->type = V4L2_FRMSIZE_TYPE_CONTINUOUS; 665 fsize->stepwise.min_width = CAMSS_FRAME_MIN_WIDTH; 666 fsize->stepwise.max_width = CAMSS_FRAME_MAX_WIDTH; 667 fsize->stepwise.min_height = CAMSS_FRAME_MIN_HEIGHT; 668 fsize->stepwise.max_height = (video->line_based) ? 669 CAMSS_FRAME_MAX_HEIGHT_PIX : CAMSS_FRAME_MAX_HEIGHT_RDI; 670 fsize->stepwise.step_width = 1; 671 fsize->stepwise.step_height = 1; 672 673 return 0; 674 } 675 676 static int video_g_fmt(struct file *file, void *fh, struct v4l2_format *f) 677 { 678 struct camss_video *video = video_drvdata(file); 679 680 *f = video->active_fmt; 681 682 return 0; 683 } 684 685 static int __video_try_fmt(struct camss_video *video, struct v4l2_format *f) 686 { 687 struct v4l2_pix_format_mplane *pix_mp; 688 const struct camss_format_info *fi; 689 struct v4l2_plane_pix_format *p; 690 u32 bytesperline[3] = { 0 }; 691 u32 sizeimage[3] = { 0 }; 692 u32 width, height; 693 u32 bpl, lines; 694 int i, j; 695 696 pix_mp = &f->fmt.pix_mp; 697 698 if (video->line_based) 699 for (i = 0; i < pix_mp->num_planes && i < 3; i++) { 700 p = &pix_mp->plane_fmt[i]; 701 bytesperline[i] = clamp_t(u32, p->bytesperline, 702 1, 65528); 703 sizeimage[i] = clamp_t(u32, p->sizeimage, 704 bytesperline[i], 705 bytesperline[i] * CAMSS_FRAME_MAX_HEIGHT_PIX); 706 } 707 708 for (j = 0; j < video->nformats; j++) 709 if (pix_mp->pixelformat == video->formats[j].pixelformat) 710 break; 711 712 if (j == video->nformats) 713 j = 0; /* default format */ 714 715 fi = &video->formats[j]; 716 width = pix_mp->width; 717 height = pix_mp->height; 718 719 memset(pix_mp, 0, sizeof(*pix_mp)); 720 721 pix_mp->pixelformat = fi->pixelformat; 722 pix_mp->width = clamp_t(u32, width, 1, CAMSS_FRAME_MAX_WIDTH); 723 pix_mp->height = clamp_t(u32, height, 1, CAMSS_FRAME_MAX_HEIGHT_RDI); 724 pix_mp->num_planes = fi->planes; 725 for (i = 0; i < pix_mp->num_planes; i++) { 726 bpl = pix_mp->width / fi->hsub[i].numerator * 727 fi->hsub[i].denominator * fi->bpp[i] / 8; 728 bpl = ALIGN(bpl, video->bpl_alignment); 729 pix_mp->plane_fmt[i].bytesperline = bpl; 730 pix_mp->plane_fmt[i].sizeimage = pix_mp->height / 731 fi->vsub[i].numerator * fi->vsub[i].denominator * bpl; 732 } 733 734 pix_mp->field = V4L2_FIELD_NONE; 735 pix_mp->colorspace = V4L2_COLORSPACE_SRGB; 736 pix_mp->flags = 0; 737 pix_mp->ycbcr_enc = V4L2_MAP_YCBCR_ENC_DEFAULT(pix_mp->colorspace); 738 pix_mp->quantization = V4L2_MAP_QUANTIZATION_DEFAULT(true, 739 pix_mp->colorspace, pix_mp->ycbcr_enc); 740 pix_mp->xfer_func = V4L2_MAP_XFER_FUNC_DEFAULT(pix_mp->colorspace); 741 742 if (video->line_based) 743 for (i = 0; i < pix_mp->num_planes; i++) { 744 p = &pix_mp->plane_fmt[i]; 745 p->bytesperline = clamp_t(u32, p->bytesperline, 746 1, 65528); 747 p->sizeimage = clamp_t(u32, p->sizeimage, 748 p->bytesperline, 749 p->bytesperline * CAMSS_FRAME_MAX_HEIGHT_PIX); 750 lines = p->sizeimage / p->bytesperline; 751 752 if (p->bytesperline < bytesperline[i]) 753 p->bytesperline = ALIGN(bytesperline[i], 8); 754 755 if (p->sizeimage < p->bytesperline * lines) 756 p->sizeimage = p->bytesperline * lines; 757 758 if (p->sizeimage < sizeimage[i]) 759 p->sizeimage = sizeimage[i]; 760 } 761 762 return 0; 763 } 764 765 static int video_try_fmt(struct file *file, void *fh, struct v4l2_format *f) 766 { 767 struct camss_video *video = video_drvdata(file); 768 769 return __video_try_fmt(video, f); 770 } 771 772 static int video_s_fmt(struct file *file, void *fh, struct v4l2_format *f) 773 { 774 struct camss_video *video = video_drvdata(file); 775 int ret; 776 777 if (vb2_is_busy(&video->vb2_q)) 778 return -EBUSY; 779 780 ret = __video_try_fmt(video, f); 781 if (ret < 0) 782 return ret; 783 784 video->active_fmt = *f; 785 786 return 0; 787 } 788 789 static int video_enum_input(struct file *file, void *fh, 790 struct v4l2_input *input) 791 { 792 if (input->index > 0) 793 return -EINVAL; 794 795 strscpy(input->name, "camera", sizeof(input->name)); 796 input->type = V4L2_INPUT_TYPE_CAMERA; 797 798 return 0; 799 } 800 801 static int video_g_input(struct file *file, void *fh, unsigned int *input) 802 { 803 *input = 0; 804 805 return 0; 806 } 807 808 static int video_s_input(struct file *file, void *fh, unsigned int input) 809 { 810 return input == 0 ? 0 : -EINVAL; 811 } 812 813 static const struct v4l2_ioctl_ops msm_vid_ioctl_ops = { 814 .vidioc_querycap = video_querycap, 815 .vidioc_enum_fmt_vid_cap = video_enum_fmt, 816 .vidioc_enum_framesizes = video_enum_framesizes, 817 .vidioc_g_fmt_vid_cap_mplane = video_g_fmt, 818 .vidioc_s_fmt_vid_cap_mplane = video_s_fmt, 819 .vidioc_try_fmt_vid_cap_mplane = video_try_fmt, 820 .vidioc_reqbufs = vb2_ioctl_reqbufs, 821 .vidioc_querybuf = vb2_ioctl_querybuf, 822 .vidioc_qbuf = vb2_ioctl_qbuf, 823 .vidioc_expbuf = vb2_ioctl_expbuf, 824 .vidioc_dqbuf = vb2_ioctl_dqbuf, 825 .vidioc_create_bufs = vb2_ioctl_create_bufs, 826 .vidioc_prepare_buf = vb2_ioctl_prepare_buf, 827 .vidioc_streamon = vb2_ioctl_streamon, 828 .vidioc_streamoff = vb2_ioctl_streamoff, 829 .vidioc_enum_input = video_enum_input, 830 .vidioc_g_input = video_g_input, 831 .vidioc_s_input = video_s_input, 832 }; 833 834 /* ----------------------------------------------------------------------------- 835 * V4L2 file operations 836 */ 837 838 static int video_open(struct file *file) 839 { 840 struct video_device *vdev = video_devdata(file); 841 struct camss_video *video = video_drvdata(file); 842 struct v4l2_fh *vfh; 843 int ret; 844 845 mutex_lock(&video->lock); 846 847 vfh = kzalloc(sizeof(*vfh), GFP_KERNEL); 848 if (vfh == NULL) { 849 ret = -ENOMEM; 850 goto error_alloc; 851 } 852 853 v4l2_fh_init(vfh, vdev); 854 v4l2_fh_add(vfh); 855 856 file->private_data = vfh; 857 858 ret = v4l2_pipeline_pm_get(&vdev->entity); 859 if (ret < 0) { 860 dev_err(video->camss->dev, "Failed to power up pipeline: %d\n", 861 ret); 862 goto error_pm_use; 863 } 864 865 mutex_unlock(&video->lock); 866 867 return 0; 868 869 error_pm_use: 870 v4l2_fh_release(file); 871 872 error_alloc: 873 mutex_unlock(&video->lock); 874 875 return ret; 876 } 877 878 static int video_release(struct file *file) 879 { 880 struct video_device *vdev = video_devdata(file); 881 882 vb2_fop_release(file); 883 884 v4l2_pipeline_pm_put(&vdev->entity); 885 886 file->private_data = NULL; 887 888 return 0; 889 } 890 891 static const struct v4l2_file_operations msm_vid_fops = { 892 .owner = THIS_MODULE, 893 .unlocked_ioctl = video_ioctl2, 894 .open = video_open, 895 .release = video_release, 896 .poll = vb2_fop_poll, 897 .mmap = vb2_fop_mmap, 898 .read = vb2_fop_read, 899 }; 900 901 /* ----------------------------------------------------------------------------- 902 * CAMSS video core 903 */ 904 905 static void msm_video_release(struct video_device *vdev) 906 { 907 struct camss_video *video = video_get_drvdata(vdev); 908 909 media_entity_cleanup(&vdev->entity); 910 911 mutex_destroy(&video->q_lock); 912 mutex_destroy(&video->lock); 913 914 if (atomic_dec_and_test(&video->camss->ref_count)) 915 camss_delete(video->camss); 916 } 917 918 /* 919 * msm_video_init_format - Helper function to initialize format 920 * @video: struct camss_video 921 * 922 * Initialize pad format with default value. 923 * 924 * Return 0 on success or a negative error code otherwise 925 */ 926 static int msm_video_init_format(struct camss_video *video) 927 { 928 int ret; 929 struct v4l2_format format = { 930 .type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, 931 .fmt.pix_mp = { 932 .width = 1920, 933 .height = 1080, 934 .pixelformat = video->formats[0].pixelformat, 935 }, 936 }; 937 938 ret = __video_try_fmt(video, &format); 939 if (ret < 0) 940 return ret; 941 942 video->active_fmt = format; 943 944 return 0; 945 } 946 947 /* 948 * msm_video_register - Register a video device node 949 * @video: struct camss_video 950 * @v4l2_dev: V4L2 device 951 * @name: name to be used for the video device node 952 * 953 * Initialize and register a video device node to a V4L2 device. Also 954 * initialize the vb2 queue. 955 * 956 * Return 0 on success or a negative error code otherwise 957 */ 958 959 int msm_video_register(struct camss_video *video, struct v4l2_device *v4l2_dev, 960 const char *name, int is_pix) 961 { 962 struct media_pad *pad = &video->pad; 963 struct video_device *vdev; 964 struct vb2_queue *q; 965 int ret; 966 967 vdev = &video->vdev; 968 969 mutex_init(&video->q_lock); 970 971 q = &video->vb2_q; 972 q->drv_priv = video; 973 q->mem_ops = &vb2_dma_sg_memops; 974 q->ops = &msm_video_vb2_q_ops; 975 q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE; 976 q->io_modes = VB2_DMABUF | VB2_MMAP | VB2_READ; 977 q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; 978 q->buf_struct_size = sizeof(struct camss_buffer); 979 q->dev = video->camss->dev; 980 q->lock = &video->q_lock; 981 ret = vb2_queue_init(q); 982 if (ret < 0) { 983 dev_err(v4l2_dev->dev, "Failed to init vb2 queue: %d\n", ret); 984 goto error_vb2_init; 985 } 986 987 pad->flags = MEDIA_PAD_FL_SINK; 988 ret = media_entity_pads_init(&vdev->entity, 1, pad); 989 if (ret < 0) { 990 dev_err(v4l2_dev->dev, "Failed to init video entity: %d\n", 991 ret); 992 goto error_vb2_init; 993 } 994 995 mutex_init(&video->lock); 996 997 if (video->camss->version == CAMSS_8x16) { 998 if (is_pix) { 999 video->formats = formats_pix_8x16; 1000 video->nformats = ARRAY_SIZE(formats_pix_8x16); 1001 } else { 1002 video->formats = formats_rdi_8x16; 1003 video->nformats = ARRAY_SIZE(formats_rdi_8x16); 1004 } 1005 } else if (video->camss->version == CAMSS_8x96 || 1006 video->camss->version == CAMSS_660) { 1007 if (is_pix) { 1008 video->formats = formats_pix_8x96; 1009 video->nformats = ARRAY_SIZE(formats_pix_8x96); 1010 } else { 1011 video->formats = formats_rdi_8x96; 1012 video->nformats = ARRAY_SIZE(formats_rdi_8x96); 1013 } 1014 } else if (video->camss->version == CAMSS_845 || 1015 video->camss->version == CAMSS_8250) { 1016 video->formats = formats_rdi_845; 1017 video->nformats = ARRAY_SIZE(formats_rdi_845); 1018 } else { 1019 ret = -EINVAL; 1020 goto error_video_register; 1021 } 1022 1023 ret = msm_video_init_format(video); 1024 if (ret < 0) { 1025 dev_err(v4l2_dev->dev, "Failed to init format: %d\n", ret); 1026 goto error_video_register; 1027 } 1028 1029 vdev->fops = &msm_vid_fops; 1030 vdev->device_caps = V4L2_CAP_VIDEO_CAPTURE_MPLANE | V4L2_CAP_STREAMING 1031 | V4L2_CAP_READWRITE | V4L2_CAP_IO_MC; 1032 vdev->ioctl_ops = &msm_vid_ioctl_ops; 1033 vdev->release = msm_video_release; 1034 vdev->v4l2_dev = v4l2_dev; 1035 vdev->vfl_dir = VFL_DIR_RX; 1036 vdev->queue = &video->vb2_q; 1037 vdev->lock = &video->lock; 1038 strscpy(vdev->name, name, sizeof(vdev->name)); 1039 1040 ret = video_register_device(vdev, VFL_TYPE_VIDEO, -1); 1041 if (ret < 0) { 1042 dev_err(v4l2_dev->dev, "Failed to register video device: %d\n", 1043 ret); 1044 goto error_video_register; 1045 } 1046 1047 video_set_drvdata(vdev, video); 1048 atomic_inc(&video->camss->ref_count); 1049 1050 return 0; 1051 1052 error_video_register: 1053 media_entity_cleanup(&vdev->entity); 1054 mutex_destroy(&video->lock); 1055 error_vb2_init: 1056 mutex_destroy(&video->q_lock); 1057 1058 return ret; 1059 } 1060 1061 void msm_video_unregister(struct camss_video *video) 1062 { 1063 atomic_inc(&video->camss->ref_count); 1064 vb2_video_unregister_device(&video->vdev); 1065 atomic_dec(&video->camss->ref_count); 1066 } 1067