diff options
Diffstat (limited to 'drivers/media/platform/rcar-vin/rcar-dma.c')
| -rw-r--r-- | drivers/media/platform/rcar-vin/rcar-dma.c | 1347 |
1 files changed, 1347 insertions, 0 deletions
diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c new file mode 100644 index 000000000..70a8cc433 --- /dev/null +++ b/drivers/media/platform/rcar-vin/rcar-dma.c @@ -0,0 +1,1347 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Driver for Renesas R-Car VIN + * + * Copyright (C) 2016 Renesas Electronics Corp. + * Copyright (C) 2011-2013 Renesas Solutions Corp. + * Copyright (C) 2013 Cogent Embedded, Inc., <source@cogentembedded.com> + * Copyright (C) 2008 Magnus Damm + * + * Based on the soc-camera rcar_vin driver + */ + +#include <linux/delay.h> +#include <linux/interrupt.h> +#include <linux/pm_runtime.h> + +#include <media/videobuf2-dma-contig.h> + +#include "rcar-vin.h" + +/* ----------------------------------------------------------------------------- + * HW Functions + */ + +/* Register offsets for R-Car VIN */ +#define VNMC_REG 0x00 /* Video n Main Control Register */ +#define VNMS_REG 0x04 /* Video n Module Status Register */ +#define VNFC_REG 0x08 /* Video n Frame Capture Register */ +#define VNSLPRC_REG 0x0C /* Video n Start Line Pre-Clip Register */ +#define VNELPRC_REG 0x10 /* Video n End Line Pre-Clip Register */ +#define VNSPPRC_REG 0x14 /* Video n Start Pixel Pre-Clip Register */ +#define VNEPPRC_REG 0x18 /* Video n End Pixel Pre-Clip Register */ +#define VNIS_REG 0x2C /* Video n Image Stride Register */ +#define VNMB_REG(m) (0x30 + ((m) << 2)) /* Video n Memory Base m Register */ +#define VNIE_REG 0x40 /* Video n Interrupt Enable Register */ +#define VNINTS_REG 0x44 /* Video n Interrupt Status Register */ +#define VNSI_REG 0x48 /* Video n Scanline Interrupt Register */ +#define VNMTC_REG 0x4C /* Video n Memory Transfer Control Register */ +#define VNDMR_REG 0x58 /* Video n Data Mode Register */ +#define VNDMR2_REG 0x5C /* Video n Data Mode Register 2 */ +#define VNUVAOF_REG 0x60 /* Video n UV Address Offset Register */ + +/* Register offsets specific for Gen2 */ +#define VNSLPOC_REG 0x1C /* Video n Start Line Post-Clip Register */ +#define VNELPOC_REG 0x20 /* Video n End Line Post-Clip Register */ +#define VNSPPOC_REG 0x24 /* Video n Start Pixel Post-Clip Register */ +#define VNEPPOC_REG 0x28 /* Video n End Pixel Post-Clip Register */ +#define VNYS_REG 0x50 /* Video n Y Scale Register */ +#define VNXS_REG 0x54 /* Video n X Scale Register */ +#define VNC1A_REG 0x80 /* Video n Coefficient Set C1A Register */ +#define VNC1B_REG 0x84 /* Video n Coefficient Set C1B Register */ +#define VNC1C_REG 0x88 /* Video n Coefficient Set C1C Register */ +#define VNC2A_REG 0x90 /* Video n Coefficient Set C2A Register */ +#define VNC2B_REG 0x94 /* Video n Coefficient Set C2B Register */ +#define VNC2C_REG 0x98 /* Video n Coefficient Set C2C Register */ +#define VNC3A_REG 0xA0 /* Video n Coefficient Set C3A Register */ +#define VNC3B_REG 0xA4 /* Video n Coefficient Set C3B Register */ +#define VNC3C_REG 0xA8 /* Video n Coefficient Set C3C Register */ +#define VNC4A_REG 0xB0 /* Video n Coefficient Set C4A Register */ +#define VNC4B_REG 0xB4 /* Video n Coefficient Set C4B Register */ +#define VNC4C_REG 0xB8 /* Video n Coefficient Set C4C Register */ +#define VNC5A_REG 0xC0 /* Video n Coefficient Set C5A Register */ +#define VNC5B_REG 0xC4 /* Video n Coefficient Set C5B Register */ +#define VNC5C_REG 0xC8 /* Video n Coefficient Set C5C Register */ +#define VNC6A_REG 0xD0 /* Video n Coefficient Set C6A Register */ +#define VNC6B_REG 0xD4 /* Video n Coefficient Set C6B Register */ +#define VNC6C_REG 0xD8 /* Video n Coefficient Set C6C Register */ +#define VNC7A_REG 0xE0 /* Video n Coefficient Set C7A Register */ +#define VNC7B_REG 0xE4 /* Video n Coefficient Set C7B Register */ +#define VNC7C_REG 0xE8 /* Video n Coefficient Set C7C Register */ +#define VNC8A_REG 0xF0 /* Video n Coefficient Set C8A Register */ +#define VNC8B_REG 0xF4 /* Video n Coefficient Set C8B Register */ +#define VNC8C_REG 0xF8 /* Video n Coefficient Set C8C Register */ + +/* Register offsets specific for Gen3 */ +#define VNCSI_IFMD_REG 0x20 /* Video n CSI2 Interface Mode Register */ + +/* Register bit fields for R-Car VIN */ +/* Video n Main Control Register bits */ +#define VNMC_DPINE (1 << 27) /* Gen3 specific */ +#define VNMC_SCLE (1 << 26) /* Gen3 specific */ +#define VNMC_FOC (1 << 21) +#define VNMC_YCAL (1 << 19) +#define VNMC_INF_YUV8_BT656 (0 << 16) +#define VNMC_INF_YUV8_BT601 (1 << 16) +#define VNMC_INF_YUV10_BT656 (2 << 16) +#define VNMC_INF_YUV10_BT601 (3 << 16) +#define VNMC_INF_YUV16 (5 << 16) +#define VNMC_INF_RGB888 (6 << 16) +#define VNMC_VUP (1 << 10) +#define VNMC_IM_ODD (0 << 3) +#define VNMC_IM_ODD_EVEN (1 << 3) +#define VNMC_IM_EVEN (2 << 3) +#define VNMC_IM_FULL (3 << 3) +#define VNMC_BPS (1 << 1) +#define VNMC_ME (1 << 0) + +/* Video n Module Status Register bits */ +#define VNMS_FBS_MASK (3 << 3) +#define VNMS_FBS_SHIFT 3 +#define VNMS_FS (1 << 2) +#define VNMS_AV (1 << 1) +#define VNMS_CA (1 << 0) + +/* Video n Frame Capture Register bits */ +#define VNFC_C_FRAME (1 << 1) +#define VNFC_S_FRAME (1 << 0) + +/* Video n Interrupt Enable Register bits */ +#define VNIE_FIE (1 << 4) +#define VNIE_EFE (1 << 1) + +/* Video n Data Mode Register bits */ +#define VNDMR_EXRGB (1 << 8) +#define VNDMR_BPSM (1 << 4) +#define VNDMR_DTMD_YCSEP (1 << 1) +#define VNDMR_DTMD_ARGB1555 (1 << 0) + +/* Video n Data Mode Register 2 bits */ +#define VNDMR2_VPS (1 << 30) +#define VNDMR2_HPS (1 << 29) +#define VNDMR2_CES (1 << 28) +#define VNDMR2_FTEV (1 << 17) +#define VNDMR2_VLV(n) ((n & 0xf) << 12) + +/* Video n CSI2 Interface Mode Register (Gen3) */ +#define VNCSI_IFMD_DES1 (1 << 26) +#define VNCSI_IFMD_DES0 (1 << 25) +#define VNCSI_IFMD_CSI_CHSEL(n) (((n) & 0xf) << 0) +#define VNCSI_IFMD_CSI_CHSEL_MASK 0xf + +struct rvin_buffer { + struct vb2_v4l2_buffer vb; + struct list_head list; +}; + +#define to_buf_list(vb2_buffer) (&container_of(vb2_buffer, \ + struct rvin_buffer, \ + vb)->list) + +static void rvin_write(struct rvin_dev *vin, u32 value, u32 offset) +{ + iowrite32(value, vin->base + offset); +} + +static u32 rvin_read(struct rvin_dev *vin, u32 offset) +{ + return ioread32(vin->base + offset); +} + +/* ----------------------------------------------------------------------------- + * Crop and Scaling Gen2 + */ + +struct vin_coeff { + unsigned short xs_value; + u32 coeff_set[24]; +}; + +static const struct vin_coeff vin_coeff_set[] = { + { 0x0000, { + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000, + 0x00000000, 0x00000000, 0x00000000 }, + }, + { 0x1000, { + 0x000fa400, 0x000fa400, 0x09625902, + 0x000003f8, 0x00000403, 0x3de0d9f0, + 0x001fffed, 0x00000804, 0x3cc1f9c3, + 0x001003de, 0x00000c01, 0x3cb34d7f, + 0x002003d2, 0x00000c00, 0x3d24a92d, + 0x00200bca, 0x00000bff, 0x3df600d2, + 0x002013cc, 0x000007ff, 0x3ed70c7e, + 0x00100fde, 0x00000000, 0x3f87c036 }, + }, + { 0x1200, { + 0x002ffff1, 0x002ffff1, 0x02a0a9c8, + 0x002003e7, 0x001ffffa, 0x000185bc, + 0x002007dc, 0x000003ff, 0x3e52859c, + 0x00200bd4, 0x00000002, 0x3d53996b, + 0x00100fd0, 0x00000403, 0x3d04ad2d, + 0x00000bd5, 0x00000403, 0x3d35ace7, + 0x3ff003e4, 0x00000801, 0x3dc674a1, + 0x3fffe800, 0x00000800, 0x3e76f461 }, + }, + { 0x1400, { + 0x00100be3, 0x00100be3, 0x04d1359a, + 0x00000fdb, 0x002003ed, 0x0211fd93, + 0x00000fd6, 0x002003f4, 0x0002d97b, + 0x000007d6, 0x002ffffb, 0x3e93b956, + 0x3ff003da, 0x001003ff, 0x3db49926, + 0x3fffefe9, 0x00100001, 0x3d655cee, + 0x3fffd400, 0x00000003, 0x3d65f4b6, + 0x000fb421, 0x00000402, 0x3dc6547e }, + }, + { 0x1600, { + 0x00000bdd, 0x00000bdd, 0x06519578, + 0x3ff007da, 0x00000be3, 0x03c24973, + 0x3ff003d9, 0x00000be9, 0x01b30d5f, + 0x3ffff7df, 0x001003f1, 0x0003c542, + 0x000fdfec, 0x001003f7, 0x3ec4711d, + 0x000fc400, 0x002ffffd, 0x3df504f1, + 0x001fa81a, 0x002ffc00, 0x3d957cc2, + 0x002f8c3c, 0x00100000, 0x3db5c891 }, + }, + { 0x1800, { + 0x3ff003dc, 0x3ff003dc, 0x0791e558, + 0x000ff7dd, 0x3ff007de, 0x05328554, + 0x000fe7e3, 0x3ff00be2, 0x03232546, + 0x000fd7ee, 0x000007e9, 0x0143bd30, + 0x001fb800, 0x000007ee, 0x00044511, + 0x002fa015, 0x000007f4, 0x3ef4bcee, + 0x002f8832, 0x001003f9, 0x3e4514c7, + 0x001f7853, 0x001003fd, 0x3de54c9f }, + }, + { 0x1a00, { + 0x000fefe0, 0x000fefe0, 0x08721d3c, + 0x001fdbe7, 0x000ffbde, 0x0652a139, + 0x001fcbf0, 0x000003df, 0x0463292e, + 0x002fb3ff, 0x3ff007e3, 0x0293a91d, + 0x002f9c12, 0x3ff00be7, 0x01241905, + 0x001f8c29, 0x000007ed, 0x3fe470eb, + 0x000f7c46, 0x000007f2, 0x3f04b8ca, + 0x3fef7865, 0x000007f6, 0x3e74e4a8 }, + }, + { 0x1c00, { + 0x001fd3e9, 0x001fd3e9, 0x08f23d26, + 0x002fbff3, 0x001fe3e4, 0x0712ad23, + 0x002fa800, 0x000ff3e0, 0x05631d1b, + 0x001f9810, 0x000ffbe1, 0x03b3890d, + 0x000f8c23, 0x000003e3, 0x0233e8fa, + 0x3fef843b, 0x000003e7, 0x00f430e4, + 0x3fbf8456, 0x3ff00bea, 0x00046cc8, + 0x3f8f8c72, 0x3ff00bef, 0x3f3490ac }, + }, + { 0x1e00, { + 0x001fbbf4, 0x001fbbf4, 0x09425112, + 0x001fa800, 0x002fc7ed, 0x0792b110, + 0x000f980e, 0x001fdbe6, 0x0613110a, + 0x3fff8c20, 0x001fe7e3, 0x04a368fd, + 0x3fcf8c33, 0x000ff7e2, 0x0343b8ed, + 0x3f9f8c4a, 0x000fffe3, 0x0203f8da, + 0x3f5f9c61, 0x000003e6, 0x00e428c5, + 0x3f1fb07b, 0x000003eb, 0x3fe440af }, + }, + { 0x2000, { + 0x000fa400, 0x000fa400, 0x09625902, + 0x3fff980c, 0x001fb7f5, 0x0812b0ff, + 0x3fdf901c, 0x001fc7ed, 0x06b2fcfa, + 0x3faf902d, 0x001fd3e8, 0x055348f1, + 0x3f7f983f, 0x001fe3e5, 0x04038ce3, + 0x3f3fa454, 0x001fefe3, 0x02e3c8d1, + 0x3f0fb86a, 0x001ff7e4, 0x01c3e8c0, + 0x3ecfd880, 0x000fffe6, 0x00c404ac }, + }, + { 0x2200, { + 0x3fdf9c0b, 0x3fdf9c0b, 0x09725cf4, + 0x3fbf9818, 0x3fffa400, 0x0842a8f1, + 0x3f8f9827, 0x000fb3f7, 0x0702f0ec, + 0x3f5fa037, 0x000fc3ef, 0x05d330e4, + 0x3f2fac49, 0x001fcfea, 0x04a364d9, + 0x3effc05c, 0x001fdbe7, 0x038394ca, + 0x3ecfdc6f, 0x001fe7e6, 0x0273b0bb, + 0x3ea00083, 0x001fefe6, 0x0183c0a9 }, + }, + { 0x2400, { + 0x3f9fa014, 0x3f9fa014, 0x098260e6, + 0x3f7f9c23, 0x3fcf9c0a, 0x08629ce5, + 0x3f4fa431, 0x3fefa400, 0x0742d8e1, + 0x3f1fb440, 0x3fffb3f8, 0x062310d9, + 0x3eefc850, 0x000fbbf2, 0x050340d0, + 0x3ecfe062, 0x000fcbec, 0x041364c2, + 0x3ea00073, 0x001fd3ea, 0x03037cb5, + 0x3e902086, 0x001fdfe8, 0x022388a5 }, + }, + { 0x2600, { + 0x3f5fa81e, 0x3f5fa81e, 0x096258da, + 0x3f3fac2b, 0x3f8fa412, 0x088290d8, + 0x3f0fbc38, 0x3fafa408, 0x0772c8d5, + 0x3eefcc47, 0x3fcfa800, 0x0672f4ce, + 0x3ecfe456, 0x3fefaffa, 0x05531cc6, + 0x3eb00066, 0x3fffbbf3, 0x047334bb, + 0x3ea01c77, 0x000fc7ee, 0x039348ae, + 0x3ea04486, 0x000fd3eb, 0x02b350a1 }, + }, + { 0x2800, { + 0x3f2fb426, 0x3f2fb426, 0x094250ce, + 0x3f0fc032, 0x3f4fac1b, 0x086284cd, + 0x3eefd040, 0x3f7fa811, 0x0782acc9, + 0x3ecfe84c, 0x3f9fa807, 0x06a2d8c4, + 0x3eb0005b, 0x3fbfac00, 0x05b2f4bc, + 0x3eb0186a, 0x3fdfb3fa, 0x04c308b4, + 0x3eb04077, 0x3fefbbf4, 0x03f31ca8, + 0x3ec06884, 0x000fbff2, 0x03031c9e }, + }, + { 0x2a00, { + 0x3f0fc42d, 0x3f0fc42d, 0x090240c4, + 0x3eefd439, 0x3f2fb822, 0x08526cc2, + 0x3edfe845, 0x3f4fb018, 0x078294bf, + 0x3ec00051, 0x3f6fac0f, 0x06b2b4bb, + 0x3ec0185f, 0x3f8fac07, 0x05e2ccb4, + 0x3ec0386b, 0x3fafac00, 0x0502e8ac, + 0x3ed05c77, 0x3fcfb3fb, 0x0432f0a3, + 0x3ef08482, 0x3fdfbbf6, 0x0372f898 }, + }, + { 0x2c00, { + 0x3eefdc31, 0x3eefdc31, 0x08e238b8, + 0x3edfec3d, 0x3f0fc828, 0x082258b9, + 0x3ed00049, 0x3f1fc01e, 0x077278b6, + 0x3ed01455, 0x3f3fb815, 0x06c294b2, + 0x3ed03460, 0x3f5fb40d, 0x0602acac, + 0x3ef0506c, 0x3f7fb006, 0x0542c0a4, + 0x3f107476, 0x3f9fb400, 0x0472c89d, + 0x3f309c80, 0x3fbfb7fc, 0x03b2cc94 }, + }, + { 0x2e00, { + 0x3eefec37, 0x3eefec37, 0x088220b0, + 0x3ee00041, 0x3effdc2d, 0x07f244ae, + 0x3ee0144c, 0x3f0fd023, 0x07625cad, + 0x3ef02c57, 0x3f1fc81a, 0x06c274a9, + 0x3f004861, 0x3f3fbc13, 0x060288a6, + 0x3f20686b, 0x3f5fb80c, 0x05529c9e, + 0x3f408c74, 0x3f6fb805, 0x04b2ac96, + 0x3f80ac7e, 0x3f8fb800, 0x0402ac8e }, + }, + { 0x3000, { + 0x3ef0003a, 0x3ef0003a, 0x084210a6, + 0x3ef01045, 0x3effec32, 0x07b228a7, + 0x3f00284e, 0x3f0fdc29, 0x073244a4, + 0x3f104058, 0x3f0fd420, 0x06a258a2, + 0x3f305c62, 0x3f2fc818, 0x0612689d, + 0x3f508069, 0x3f3fc011, 0x05728496, + 0x3f80a072, 0x3f4fc00a, 0x04d28c90, + 0x3fc0c07b, 0x3f6fbc04, 0x04429088 }, + }, + { 0x3200, { + 0x3f00103e, 0x3f00103e, 0x07f1fc9e, + 0x3f102447, 0x3f000035, 0x0782149d, + 0x3f203c4f, 0x3f0ff02c, 0x07122c9c, + 0x3f405458, 0x3f0fe424, 0x06924099, + 0x3f607061, 0x3f1fd41d, 0x06024c97, + 0x3f909068, 0x3f2fcc16, 0x05726490, + 0x3fc0b070, 0x3f3fc80f, 0x04f26c8a, + 0x0000d077, 0x3f4fc409, 0x04627484 }, + }, + { 0x3400, { + 0x3f202040, 0x3f202040, 0x07a1e898, + 0x3f303449, 0x3f100c38, 0x0741fc98, + 0x3f504c50, 0x3f10002f, 0x06e21495, + 0x3f706459, 0x3f1ff028, 0x06722492, + 0x3fa08060, 0x3f1fe421, 0x05f2348f, + 0x3fd09c67, 0x3f1fdc19, 0x05824c89, + 0x0000bc6e, 0x3f2fd014, 0x04f25086, + 0x0040dc74, 0x3f3fcc0d, 0x04825c7f }, + }, + { 0x3600, { + 0x3f403042, 0x3f403042, 0x0761d890, + 0x3f504848, 0x3f301c3b, 0x0701f090, + 0x3f805c50, 0x3f200c33, 0x06a2008f, + 0x3fa07458, 0x3f10002b, 0x06520c8d, + 0x3fd0905e, 0x3f1ff424, 0x05e22089, + 0x0000ac65, 0x3f1fe81d, 0x05823483, + 0x0030cc6a, 0x3f2fdc18, 0x04f23c81, + 0x0080e871, 0x3f2fd412, 0x0482407c }, + }, + { 0x3800, { + 0x3f604043, 0x3f604043, 0x0721c88a, + 0x3f80544a, 0x3f502c3c, 0x06d1d88a, + 0x3fb06851, 0x3f301c35, 0x0681e889, + 0x3fd08456, 0x3f30082f, 0x0611fc88, + 0x00009c5d, 0x3f200027, 0x05d20884, + 0x0030b863, 0x3f2ff421, 0x05621880, + 0x0070d468, 0x3f2fe81b, 0x0502247c, + 0x00c0ec6f, 0x3f2fe015, 0x04a22877 }, + }, + { 0x3a00, { + 0x3f904c44, 0x3f904c44, 0x06e1b884, + 0x3fb0604a, 0x3f70383e, 0x0691c885, + 0x3fe07451, 0x3f502c36, 0x0661d483, + 0x00009055, 0x3f401831, 0x0601ec81, + 0x0030a85b, 0x3f300c2a, 0x05b1f480, + 0x0070c061, 0x3f300024, 0x0562047a, + 0x00b0d867, 0x3f3ff41e, 0x05020c77, + 0x00f0f46b, 0x3f2fec19, 0x04a21474 }, + }, + { 0x3c00, { + 0x3fb05c43, 0x3fb05c43, 0x06c1b07e, + 0x3fe06c4b, 0x3f902c3f, 0x0681c081, + 0x0000844f, 0x3f703838, 0x0631cc7d, + 0x00309855, 0x3f602433, 0x05d1d47e, + 0x0060b459, 0x3f50142e, 0x0581e47b, + 0x00a0c85f, 0x3f400828, 0x0531f078, + 0x00e0e064, 0x3f300021, 0x0501fc73, + 0x00b0fc6a, 0x3f3ff41d, 0x04a20873 }, + }, + { 0x3e00, { + 0x3fe06444, 0x3fe06444, 0x0681a07a, + 0x00007849, 0x3fc0503f, 0x0641b07a, + 0x0020904d, 0x3fa0403a, 0x05f1c07a, + 0x0060a453, 0x3f803034, 0x05c1c878, + 0x0090b858, 0x3f70202f, 0x0571d477, + 0x00d0d05d, 0x3f501829, 0x0531e073, + 0x0110e462, 0x3f500825, 0x04e1e471, + 0x01510065, 0x3f40001f, 0x04a1f06d }, + }, + { 0x4000, { + 0x00007044, 0x00007044, 0x06519476, + 0x00208448, 0x3fe05c3f, 0x0621a476, + 0x0050984d, 0x3fc04c3a, 0x05e1b075, + 0x0080ac52, 0x3fa03c35, 0x05a1b875, + 0x00c0c056, 0x3f803030, 0x0561c473, + 0x0100d45b, 0x3f70202b, 0x0521d46f, + 0x0140e860, 0x3f601427, 0x04d1d46e, + 0x01810064, 0x3f500822, 0x0491dc6b }, + }, + { 0x5000, { + 0x0110a442, 0x0110a442, 0x0551545e, + 0x0140b045, 0x00e0983f, 0x0531585f, + 0x0160c047, 0x00c08c3c, 0x0511645e, + 0x0190cc4a, 0x00908039, 0x04f1685f, + 0x01c0dc4c, 0x00707436, 0x04d1705e, + 0x0200e850, 0x00506833, 0x04b1785b, + 0x0230f453, 0x00305c30, 0x0491805a, + 0x02710056, 0x0010542d, 0x04718059 }, + }, + { 0x6000, { + 0x01c0bc40, 0x01c0bc40, 0x04c13052, + 0x01e0c841, 0x01a0b43d, 0x04c13851, + 0x0210cc44, 0x0180a83c, 0x04a13453, + 0x0230d845, 0x0160a03a, 0x04913c52, + 0x0260e047, 0x01409838, 0x04714052, + 0x0280ec49, 0x01208c37, 0x04514c50, + 0x02b0f44b, 0x01008435, 0x04414c50, + 0x02d1004c, 0x00e07c33, 0x0431544f }, + }, + { 0x7000, { + 0x0230c83e, 0x0230c83e, 0x04711c4c, + 0x0250d03f, 0x0210c43c, 0x0471204b, + 0x0270d840, 0x0200b83c, 0x0451244b, + 0x0290dc42, 0x01e0b43a, 0x0441244c, + 0x02b0e443, 0x01c0b038, 0x0441284b, + 0x02d0ec44, 0x01b0a438, 0x0421304a, + 0x02f0f445, 0x0190a036, 0x04213449, + 0x0310f847, 0x01709c34, 0x04213848 }, + }, + { 0x8000, { + 0x0280d03d, 0x0280d03d, 0x04310c48, + 0x02a0d43e, 0x0270c83c, 0x04311047, + 0x02b0dc3e, 0x0250c83a, 0x04311447, + 0x02d0e040, 0x0240c03a, 0x04211446, + 0x02e0e840, 0x0220bc39, 0x04111847, + 0x0300e842, 0x0210b438, 0x04012445, + 0x0310f043, 0x0200b037, 0x04012045, + 0x0330f444, 0x01e0ac36, 0x03f12445 }, + }, + { 0xefff, { + 0x0340dc3a, 0x0340dc3a, 0x03b0ec40, + 0x0340e03a, 0x0330e039, 0x03c0f03e, + 0x0350e03b, 0x0330dc39, 0x03c0ec3e, + 0x0350e43a, 0x0320dc38, 0x03c0f43e, + 0x0360e43b, 0x0320d839, 0x03b0f03e, + 0x0360e83b, 0x0310d838, 0x03c0fc3b, + 0x0370e83b, 0x0310d439, 0x03a0f83d, + 0x0370e83c, 0x0300d438, 0x03b0fc3c }, + } +}; + +static void rvin_set_coeff(struct rvin_dev *vin, unsigned short xs) +{ + int i; + const struct vin_coeff *p_prev_set = NULL; + const struct vin_coeff *p_set = NULL; + + /* Look for suitable coefficient values */ + for (i = 0; i < ARRAY_SIZE(vin_coeff_set); i++) { + p_prev_set = p_set; + p_set = &vin_coeff_set[i]; + + if (xs < p_set->xs_value) + break; + } + + /* Use previous value if its XS value is closer */ + if (p_prev_set && p_set && + xs - p_prev_set->xs_value < p_set->xs_value - xs) + p_set = p_prev_set; + + /* Set coefficient registers */ + rvin_write(vin, p_set->coeff_set[0], VNC1A_REG); + rvin_write(vin, p_set->coeff_set[1], VNC1B_REG); + rvin_write(vin, p_set->coeff_set[2], VNC1C_REG); + + rvin_write(vin, p_set->coeff_set[3], VNC2A_REG); + rvin_write(vin, p_set->coeff_set[4], VNC2B_REG); + rvin_write(vin, p_set->coeff_set[5], VNC2C_REG); + + rvin_write(vin, p_set->coeff_set[6], VNC3A_REG); + rvin_write(vin, p_set->coeff_set[7], VNC3B_REG); + rvin_write(vin, p_set->coeff_set[8], VNC3C_REG); + + rvin_write(vin, p_set->coeff_set[9], VNC4A_REG); + rvin_write(vin, p_set->coeff_set[10], VNC4B_REG); + rvin_write(vin, p_set->coeff_set[11], VNC4C_REG); + + rvin_write(vin, p_set->coeff_set[12], VNC5A_REG); + rvin_write(vin, p_set->coeff_set[13], VNC5B_REG); + rvin_write(vin, p_set->coeff_set[14], VNC5C_REG); + + rvin_write(vin, p_set->coeff_set[15], VNC6A_REG); + rvin_write(vin, p_set->coeff_set[16], VNC6B_REG); + rvin_write(vin, p_set->coeff_set[17], VNC6C_REG); + + rvin_write(vin, p_set->coeff_set[18], VNC7A_REG); + rvin_write(vin, p_set->coeff_set[19], VNC7B_REG); + rvin_write(vin, p_set->coeff_set[20], VNC7C_REG); + + rvin_write(vin, p_set->coeff_set[21], VNC8A_REG); + rvin_write(vin, p_set->coeff_set[22], VNC8B_REG); + rvin_write(vin, p_set->coeff_set[23], VNC8C_REG); +} + +static void rvin_crop_scale_comp_gen2(struct rvin_dev *vin) +{ + u32 xs, ys; + + /* Set scaling coefficient */ + ys = 0; + if (vin->crop.height != vin->compose.height) + ys = (4096 * vin->crop.height) / vin->compose.height; + rvin_write(vin, ys, VNYS_REG); + + xs = 0; + if (vin->crop.width != vin->compose.width) + xs = (4096 * vin->crop.width) / vin->compose.width; + + /* Horizontal upscaling is up to double size */ + if (xs > 0 && xs < 2048) + xs = 2048; + + rvin_write(vin, xs, VNXS_REG); + + /* Horizontal upscaling is done out by scaling down from double size */ + if (xs < 4096) + xs *= 2; + + rvin_set_coeff(vin, xs); + + /* Set Start/End Pixel/Line Post-Clip */ + rvin_write(vin, 0, VNSPPOC_REG); + rvin_write(vin, 0, VNSLPOC_REG); + rvin_write(vin, vin->format.width - 1, VNEPPOC_REG); + switch (vin->format.field) { + case V4L2_FIELD_INTERLACED: + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + rvin_write(vin, vin->format.height / 2 - 1, VNELPOC_REG); + break; + default: + rvin_write(vin, vin->format.height - 1, VNELPOC_REG); + break; + } + + vin_dbg(vin, + "Pre-Clip: %ux%u@%u:%u YS: %d XS: %d Post-Clip: %ux%u@%u:%u\n", + vin->crop.width, vin->crop.height, vin->crop.left, + vin->crop.top, ys, xs, vin->format.width, vin->format.height, + 0, 0); +} + +void rvin_crop_scale_comp(struct rvin_dev *vin) +{ + /* Set Start/End Pixel/Line Pre-Clip */ + rvin_write(vin, vin->crop.left, VNSPPRC_REG); + rvin_write(vin, vin->crop.left + vin->crop.width - 1, VNEPPRC_REG); + + switch (vin->format.field) { + case V4L2_FIELD_INTERLACED: + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + rvin_write(vin, vin->crop.top / 2, VNSLPRC_REG); + rvin_write(vin, (vin->crop.top + vin->crop.height) / 2 - 1, + VNELPRC_REG); + break; + default: + rvin_write(vin, vin->crop.top, VNSLPRC_REG); + rvin_write(vin, vin->crop.top + vin->crop.height - 1, + VNELPRC_REG); + break; + } + + /* TODO: Add support for the UDS scaler. */ + if (vin->info->model != RCAR_GEN3) + rvin_crop_scale_comp_gen2(vin); + + if (vin->format.pixelformat == V4L2_PIX_FMT_NV16) + rvin_write(vin, ALIGN(vin->format.width, 0x20), VNIS_REG); + else + rvin_write(vin, ALIGN(vin->format.width, 0x10), VNIS_REG); +} + +/* ----------------------------------------------------------------------------- + * Hardware setup + */ + +static int rvin_setup(struct rvin_dev *vin) +{ + u32 vnmc, dmr, dmr2, interrupts; + bool progressive = false, output_is_yuv = false, input_is_yuv = false; + + switch (vin->format.field) { + case V4L2_FIELD_TOP: + vnmc = VNMC_IM_ODD; + break; + case V4L2_FIELD_BOTTOM: + vnmc = VNMC_IM_EVEN; + break; + case V4L2_FIELD_INTERLACED: + /* Default to TB */ + vnmc = VNMC_IM_FULL; + /* Use BT if video standard can be read and is 60 Hz format */ + if (!vin->info->use_mc && vin->std & V4L2_STD_525_60) + vnmc = VNMC_IM_FULL | VNMC_FOC; + break; + case V4L2_FIELD_INTERLACED_TB: + vnmc = VNMC_IM_FULL; + break; + case V4L2_FIELD_INTERLACED_BT: + vnmc = VNMC_IM_FULL | VNMC_FOC; + break; + case V4L2_FIELD_NONE: + vnmc = VNMC_IM_ODD_EVEN; + progressive = true; + break; + default: + vnmc = VNMC_IM_ODD; + break; + } + + /* + * Input interface + */ + switch (vin->mbus_code) { + case MEDIA_BUS_FMT_YUYV8_1X16: + /* BT.601/BT.1358 16bit YCbCr422 */ + vnmc |= VNMC_INF_YUV16; + input_is_yuv = true; + break; + case MEDIA_BUS_FMT_UYVY8_1X16: + vnmc |= VNMC_INF_YUV16 | VNMC_YCAL; + input_is_yuv = true; + break; + case MEDIA_BUS_FMT_UYVY8_2X8: + /* BT.656 8bit YCbCr422 or BT.601 8bit YCbCr422 */ + if (!vin->is_csi && + vin->parallel->mbus_type == V4L2_MBUS_BT656) + vnmc |= VNMC_INF_YUV8_BT656; + else + vnmc |= VNMC_INF_YUV8_BT601; + + input_is_yuv = true; + break; + case MEDIA_BUS_FMT_RGB888_1X24: + vnmc |= VNMC_INF_RGB888; + break; + case MEDIA_BUS_FMT_UYVY10_2X10: + /* BT.656 10bit YCbCr422 or BT.601 10bit YCbCr422 */ + if (!vin->is_csi && + vin->parallel->mbus_type == V4L2_MBUS_BT656) + vnmc |= VNMC_INF_YUV10_BT656; + else + vnmc |= VNMC_INF_YUV10_BT601; + + input_is_yuv = true; + break; + default: + break; + } + + /* Enable VSYNC Field Toogle mode after one VSYNC input */ + if (vin->info->model == RCAR_GEN3) + dmr2 = VNDMR2_FTEV; + else + dmr2 = VNDMR2_FTEV | VNDMR2_VLV(1); + + if (!vin->is_csi) { + /* Hsync Signal Polarity Select */ + if (!(vin->parallel->mbus_flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)) + dmr2 |= VNDMR2_HPS; + + /* Vsync Signal Polarity Select */ + if (!(vin->parallel->mbus_flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)) + dmr2 |= VNDMR2_VPS; + + /* Data Enable Polarity Select */ + if (vin->parallel->mbus_flags & V4L2_MBUS_DATA_ENABLE_LOW) + dmr2 |= VNDMR2_CES; + } + + /* + * Output format + */ + switch (vin->format.pixelformat) { + case V4L2_PIX_FMT_NV16: + rvin_write(vin, + ALIGN(vin->format.width * vin->format.height, 0x80), + VNUVAOF_REG); + dmr = VNDMR_DTMD_YCSEP; + output_is_yuv = true; + break; + case V4L2_PIX_FMT_YUYV: + dmr = VNDMR_BPSM; + output_is_yuv = true; + break; + case V4L2_PIX_FMT_UYVY: + dmr = 0; + output_is_yuv = true; + break; + case V4L2_PIX_FMT_XRGB555: + dmr = VNDMR_DTMD_ARGB1555; + break; + case V4L2_PIX_FMT_RGB565: + dmr = 0; + break; + case V4L2_PIX_FMT_XBGR32: + /* Note: not supported on M1 */ + dmr = VNDMR_EXRGB; + break; + default: + vin_err(vin, "Invalid pixelformat (0x%x)\n", + vin->format.pixelformat); + return -EINVAL; + } + + /* Always update on field change */ + vnmc |= VNMC_VUP; + + /* If input and output use the same colorspace, use bypass mode */ + if (input_is_yuv == output_is_yuv) + vnmc |= VNMC_BPS; + + if (vin->info->model == RCAR_GEN3) { + /* Select between CSI-2 and parallel input */ + if (vin->is_csi) + vnmc &= ~VNMC_DPINE; + else + vnmc |= VNMC_DPINE; + } + + /* Progressive or interlaced mode */ + interrupts = progressive ? VNIE_FIE : VNIE_EFE; + + /* Ack interrupts */ + rvin_write(vin, interrupts, VNINTS_REG); + /* Enable interrupts */ + rvin_write(vin, interrupts, VNIE_REG); + /* Start capturing */ + rvin_write(vin, dmr, VNDMR_REG); + rvin_write(vin, dmr2, VNDMR2_REG); + + /* Enable module */ + rvin_write(vin, vnmc | VNMC_ME, VNMC_REG); + + return 0; +} + +static void rvin_disable_interrupts(struct rvin_dev *vin) +{ + rvin_write(vin, 0, VNIE_REG); +} + +static u32 rvin_get_interrupt_status(struct rvin_dev *vin) +{ + return rvin_read(vin, VNINTS_REG); +} + +static void rvin_ack_interrupt(struct rvin_dev *vin) +{ + rvin_write(vin, rvin_read(vin, VNINTS_REG), VNINTS_REG); +} + +static bool rvin_capture_active(struct rvin_dev *vin) +{ + return rvin_read(vin, VNMS_REG) & VNMS_CA; +} + +static void rvin_set_slot_addr(struct rvin_dev *vin, int slot, dma_addr_t addr) +{ + const struct rvin_video_format *fmt; + int offsetx, offsety; + dma_addr_t offset; + + fmt = rvin_format_from_pixel(vin->format.pixelformat); + + /* + * There is no HW support for composition do the beast we can + * by modifying the buffer offset + */ + offsetx = vin->compose.left * fmt->bpp; + offsety = vin->compose.top * vin->format.bytesperline; + offset = addr + offsetx + offsety; + + /* + * The address needs to be 128 bytes aligned. Driver should never accept + * settings that do not satisfy this in the first place... + */ + if (WARN_ON((offsetx | offsety | offset) & HW_BUFFER_MASK)) + return; + + rvin_write(vin, offset, VNMB_REG(slot)); +} + +/* + * Moves a buffer from the queue to the HW slot. If no buffer is + * available use the scratch buffer. The scratch buffer is never + * returned to userspace, its only function is to enable the capture + * loop to keep running. + */ +static void rvin_fill_hw_slot(struct rvin_dev *vin, int slot) +{ + struct rvin_buffer *buf; + struct vb2_v4l2_buffer *vbuf; + dma_addr_t phys_addr; + + /* A already populated slot shall never be overwritten. */ + if (WARN_ON(vin->queue_buf[slot] != NULL)) + return; + + vin_dbg(vin, "Filling HW slot: %d\n", slot); + + if (list_empty(&vin->buf_list)) { + vin->queue_buf[slot] = NULL; + phys_addr = vin->scratch_phys; + } else { + /* Keep track of buffer we give to HW */ + buf = list_entry(vin->buf_list.next, struct rvin_buffer, list); + vbuf = &buf->vb; + list_del_init(to_buf_list(vbuf)); + vin->queue_buf[slot] = vbuf; + + /* Setup DMA */ + phys_addr = vb2_dma_contig_plane_dma_addr(&vbuf->vb2_buf, 0); + } + + rvin_set_slot_addr(vin, slot, phys_addr); +} + +static int rvin_capture_start(struct rvin_dev *vin) +{ + int slot, ret; + + for (slot = 0; slot < HW_BUFFER_NUM; slot++) + rvin_fill_hw_slot(vin, slot); + + rvin_crop_scale_comp(vin); + + ret = rvin_setup(vin); + if (ret) + return ret; + + vin_dbg(vin, "Starting to capture\n"); + + /* Continuous Frame Capture Mode */ + rvin_write(vin, VNFC_C_FRAME, VNFC_REG); + + vin->state = STARTING; + + return 0; +} + +static void rvin_capture_stop(struct rvin_dev *vin) +{ + /* Set continuous & single transfer off */ + rvin_write(vin, 0, VNFC_REG); + + /* Disable module */ + rvin_write(vin, rvin_read(vin, VNMC_REG) & ~VNMC_ME, VNMC_REG); +} + +/* ----------------------------------------------------------------------------- + * DMA Functions + */ + +#define RVIN_TIMEOUT_MS 100 +#define RVIN_RETRIES 10 + +static irqreturn_t rvin_irq(int irq, void *data) +{ + struct rvin_dev *vin = data; + u32 int_status, vnms; + int slot; + unsigned int handled = 0; + unsigned long flags; + + spin_lock_irqsave(&vin->qlock, flags); + + int_status = rvin_get_interrupt_status(vin); + if (!int_status) + goto done; + + rvin_ack_interrupt(vin); + handled = 1; + + /* Nothing to do if capture status is 'STOPPED' */ + if (vin->state == STOPPED) { + vin_dbg(vin, "IRQ while state stopped\n"); + goto done; + } + + /* Nothing to do if capture status is 'STOPPING' */ + if (vin->state == STOPPING) { + vin_dbg(vin, "IRQ while state stopping\n"); + goto done; + } + + /* Prepare for capture and update state */ + vnms = rvin_read(vin, VNMS_REG); + slot = (vnms & VNMS_FBS_MASK) >> VNMS_FBS_SHIFT; + + /* + * To hand buffers back in a known order to userspace start + * to capture first from slot 0. + */ + if (vin->state == STARTING) { + if (slot != 0) { + vin_dbg(vin, "Starting sync slot: %d\n", slot); + goto done; + } + + vin_dbg(vin, "Capture start synced!\n"); + vin->state = RUNNING; + } + + /* Capture frame */ + if (vin->queue_buf[slot]) { + vin->queue_buf[slot]->field = vin->format.field; + vin->queue_buf[slot]->sequence = vin->sequence; + vin->queue_buf[slot]->vb2_buf.timestamp = ktime_get_ns(); + vb2_buffer_done(&vin->queue_buf[slot]->vb2_buf, + VB2_BUF_STATE_DONE); + vin->queue_buf[slot] = NULL; + } else { + /* Scratch buffer was used, dropping frame. */ + vin_dbg(vin, "Dropping frame %u\n", vin->sequence); + } + + vin->sequence++; + + /* Prepare for next frame */ + rvin_fill_hw_slot(vin, slot); +done: + spin_unlock_irqrestore(&vin->qlock, flags); + + return IRQ_RETVAL(handled); +} + +/* Need to hold qlock before calling */ +static void return_all_buffers(struct rvin_dev *vin, + enum vb2_buffer_state state) +{ + struct rvin_buffer *buf, *node; + int i; + + for (i = 0; i < HW_BUFFER_NUM; i++) { + if (vin->queue_buf[i]) { + vb2_buffer_done(&vin->queue_buf[i]->vb2_buf, + state); + vin->queue_buf[i] = NULL; + } + } + + list_for_each_entry_safe(buf, node, &vin->buf_list, list) { + vb2_buffer_done(&buf->vb.vb2_buf, state); + list_del(&buf->list); + } +} + +static int rvin_queue_setup(struct vb2_queue *vq, unsigned int *nbuffers, + unsigned int *nplanes, unsigned int sizes[], + struct device *alloc_devs[]) + +{ + struct rvin_dev *vin = vb2_get_drv_priv(vq); + + /* Make sure the image size is large enough. */ + if (*nplanes) + return sizes[0] < vin->format.sizeimage ? -EINVAL : 0; + + *nplanes = 1; + sizes[0] = vin->format.sizeimage; + + return 0; +}; + +static int rvin_buffer_prepare(struct vb2_buffer *vb) +{ + struct rvin_dev *vin = vb2_get_drv_priv(vb->vb2_queue); + unsigned long size = vin->format.sizeimage; + + if (vb2_plane_size(vb, 0) < size) { + vin_err(vin, "buffer too small (%lu < %lu)\n", + vb2_plane_size(vb, 0), size); + return -EINVAL; + } + + vb2_set_plane_payload(vb, 0, size); + + return 0; +} + +static void rvin_buffer_queue(struct vb2_buffer *vb) +{ + struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb); + struct rvin_dev *vin = vb2_get_drv_priv(vb->vb2_queue); + unsigned long flags; + + spin_lock_irqsave(&vin->qlock, flags); + + list_add_tail(to_buf_list(vbuf), &vin->buf_list); + + spin_unlock_irqrestore(&vin->qlock, flags); +} + +static int rvin_mc_validate_format(struct rvin_dev *vin, struct v4l2_subdev *sd, + struct media_pad *pad) +{ + struct v4l2_subdev_format fmt = { + .which = V4L2_SUBDEV_FORMAT_ACTIVE, + }; + + fmt.pad = pad->index; + if (v4l2_subdev_call(sd, pad, get_fmt, NULL, &fmt)) + return -EPIPE; + + switch (fmt.format.code) { + case MEDIA_BUS_FMT_YUYV8_1X16: + case MEDIA_BUS_FMT_UYVY8_1X16: + case MEDIA_BUS_FMT_UYVY8_2X8: + case MEDIA_BUS_FMT_UYVY10_2X10: + case MEDIA_BUS_FMT_RGB888_1X24: + vin->mbus_code = fmt.format.code; + break; + default: + return -EPIPE; + } + + switch (fmt.format.field) { + case V4L2_FIELD_TOP: + case V4L2_FIELD_BOTTOM: + case V4L2_FIELD_NONE: + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + case V4L2_FIELD_INTERLACED: + case V4L2_FIELD_SEQ_TB: + case V4L2_FIELD_SEQ_BT: + /* Supported natively */ + break; + case V4L2_FIELD_ALTERNATE: + switch (vin->format.field) { + case V4L2_FIELD_TOP: + case V4L2_FIELD_BOTTOM: + case V4L2_FIELD_NONE: + break; + case V4L2_FIELD_INTERLACED_TB: + case V4L2_FIELD_INTERLACED_BT: + case V4L2_FIELD_INTERLACED: + case V4L2_FIELD_SEQ_TB: + case V4L2_FIELD_SEQ_BT: + /* Use VIN hardware to combine the two fields */ + fmt.format.height *= 2; + break; + default: + return -EPIPE; + } + break; + default: + return -EPIPE; + } + + if (fmt.format.width != vin->format.width || + fmt.format.height != vin->format.height || + fmt.format.code != vin->mbus_code) + return -EPIPE; + + return 0; +} + +static int rvin_set_stream(struct rvin_dev *vin, int on) +{ + struct media_pipeline *pipe; + struct media_device *mdev; + struct v4l2_subdev *sd; + struct media_pad *pad; + int ret; + + /* No media controller used, simply pass operation to subdevice. */ + if (!vin->info->use_mc) { + ret = v4l2_subdev_call(vin->parallel->subdev, video, s_stream, + on); + + return ret == -ENOIOCTLCMD ? 0 : ret; + } + + pad = media_entity_remote_pad(&vin->pad); + if (!pad) + return -EPIPE; + + sd = media_entity_to_v4l2_subdev(pad->entity); + + if (!on) { + media_pipeline_stop(&vin->vdev.entity); + return v4l2_subdev_call(sd, video, s_stream, 0); + } + + ret = rvin_mc_validate_format(vin, sd, pad); + if (ret) + return ret; + + /* + * The graph lock needs to be taken to protect concurrent + * starts of multiple VIN instances as they might share + * a common subdevice down the line and then should use + * the same pipe. + */ + mdev = vin->vdev.entity.graph_obj.mdev; + mutex_lock(&mdev->graph_mutex); + pipe = sd->entity.pipe ? sd->entity.pipe : &vin->vdev.pipe; + ret = __media_pipeline_start(&vin->vdev.entity, pipe); + mutex_unlock(&mdev->graph_mutex); + if (ret) + return ret; + + ret = v4l2_subdev_call(sd, video, s_stream, 1); + if (ret == -ENOIOCTLCMD) + ret = 0; + if (ret) + media_pipeline_stop(&vin->vdev.entity); + + return ret; +} + +static int rvin_start_streaming(struct vb2_queue *vq, unsigned int count) +{ + struct rvin_dev *vin = vb2_get_drv_priv(vq); + unsigned long flags; + int ret; + + /* Allocate scratch buffer. */ + vin->scratch = dma_alloc_coherent(vin->dev, vin->format.sizeimage, + &vin->scratch_phys, GFP_KERNEL); + if (!vin->scratch) { + spin_lock_irqsave(&vin->qlock, flags); + return_all_buffers(vin, VB2_BUF_STATE_QUEUED); + spin_unlock_irqrestore(&vin->qlock, flags); + vin_err(vin, "Failed to allocate scratch buffer\n"); + return -ENOMEM; + } + + ret = rvin_set_stream(vin, 1); + if (ret) { + spin_lock_irqsave(&vin->qlock, flags); + return_all_buffers(vin, VB2_BUF_STATE_QUEUED); + spin_unlock_irqrestore(&vin->qlock, flags); + goto out; + } + + spin_lock_irqsave(&vin->qlock, flags); + + vin->sequence = 0; + + ret = rvin_capture_start(vin); + if (ret) { + return_all_buffers(vin, VB2_BUF_STATE_QUEUED); + rvin_set_stream(vin, 0); + } + + spin_unlock_irqrestore(&vin->qlock, flags); +out: + if (ret) + dma_free_coherent(vin->dev, vin->format.sizeimage, vin->scratch, + vin->scratch_phys); + + return ret; +} + +static void rvin_stop_streaming(struct vb2_queue *vq) +{ + struct rvin_dev *vin = vb2_get_drv_priv(vq); + unsigned long flags; + int retries = 0; + + spin_lock_irqsave(&vin->qlock, flags); + + vin->state = STOPPING; + + /* Wait for streaming to stop */ + while (retries++ < RVIN_RETRIES) { + + rvin_capture_stop(vin); + + /* Check if HW is stopped */ + if (!rvin_capture_active(vin)) { + vin->state = STOPPED; + break; + } + + spin_unlock_irqrestore(&vin->qlock, flags); + msleep(RVIN_TIMEOUT_MS); + spin_lock_irqsave(&vin->qlock, flags); + } + + if (vin->state != STOPPED) { + /* + * If this happens something have gone horribly wrong. + * Set state to stopped to prevent the interrupt handler + * to make things worse... + */ + vin_err(vin, "Failed stop HW, something is seriously broken\n"); + vin->state = STOPPED; + } + + /* Release all active buffers */ + return_all_buffers(vin, VB2_BUF_STATE_ERROR); + + spin_unlock_irqrestore(&vin->qlock, flags); + + rvin_set_stream(vin, 0); + + /* disable interrupts */ + rvin_disable_interrupts(vin); + + /* Free scratch buffer. */ + dma_free_coherent(vin->dev, vin->format.sizeimage, vin->scratch, + vin->scratch_phys); +} + +static const struct vb2_ops rvin_qops = { + .queue_setup = rvin_queue_setup, + .buf_prepare = rvin_buffer_prepare, + .buf_queue = rvin_buffer_queue, + .start_streaming = rvin_start_streaming, + .stop_streaming = rvin_stop_streaming, + .wait_prepare = vb2_ops_wait_prepare, + .wait_finish = vb2_ops_wait_finish, +}; + +void rvin_dma_unregister(struct rvin_dev *vin) +{ + mutex_destroy(&vin->lock); + + v4l2_device_unregister(&vin->v4l2_dev); +} + +int rvin_dma_register(struct rvin_dev *vin, int irq) +{ + struct vb2_queue *q = &vin->queue; + int i, ret; + + /* Initialize the top-level structure */ + ret = v4l2_device_register(vin->dev, &vin->v4l2_dev); + if (ret) + return ret; + + mutex_init(&vin->lock); + INIT_LIST_HEAD(&vin->buf_list); + + spin_lock_init(&vin->qlock); + + vin->state = STOPPED; + + for (i = 0; i < HW_BUFFER_NUM; i++) + vin->queue_buf[i] = NULL; + + /* buffer queue */ + q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE; + q->io_modes = VB2_MMAP | VB2_READ | VB2_DMABUF; + q->lock = &vin->lock; + q->drv_priv = vin; + q->buf_struct_size = sizeof(struct rvin_buffer); + q->ops = &rvin_qops; + q->mem_ops = &vb2_dma_contig_memops; + q->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC; + q->min_buffers_needed = 4; + q->dev = vin->dev; + + ret = vb2_queue_init(q); + if (ret < 0) { + vin_err(vin, "failed to initialize VB2 queue\n"); + goto error; + } + + /* irq */ + ret = devm_request_irq(vin->dev, irq, rvin_irq, IRQF_SHARED, + KBUILD_MODNAME, vin); + if (ret) { + vin_err(vin, "failed to request irq\n"); + goto error; + } + + return 0; +error: + rvin_dma_unregister(vin); + + return ret; +} + +/* ----------------------------------------------------------------------------- + * Gen3 CHSEL manipulation + */ + +/* + * There is no need to have locking around changing the routing + * as it's only possible to do so when no VIN in the group is + * streaming so nothing can race with the VNMC register. + */ +int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel) +{ + u32 ifmd, vnmc; + int ret; + + ret = pm_runtime_get_sync(vin->dev); + if (ret < 0) { + pm_runtime_put_noidle(vin->dev); + return ret; + } + + /* Make register writes take effect immediately. */ + vnmc = rvin_read(vin, VNMC_REG); + rvin_write(vin, vnmc & ~VNMC_VUP, VNMC_REG); + + ifmd = VNCSI_IFMD_DES1 | VNCSI_IFMD_DES0 | VNCSI_IFMD_CSI_CHSEL(chsel); + + rvin_write(vin, ifmd, VNCSI_IFMD_REG); + + vin_dbg(vin, "Set IFMD 0x%x\n", ifmd); + + /* Restore VNMC. */ + rvin_write(vin, vnmc, VNMC_REG); + + pm_runtime_put(vin->dev); + + return ret; +} |