// SPDX-License-Identifier: GPL-2.0
/*
* Author: Mikhail Ulyanov
* Copyright (C) 2014-2015 Cogent Embedded, Inc. <source@cogentembedded.com>
* Copyright (C) 2014-2015 Renesas Electronics Corporation
*
* This is based on the drivers/media/platform/samsung/s5p-jpeg driver by
* Andrzej Pietrasiewicz and Jacek Anaszewski.
* Some portions of code inspired by VSP1 driver by Laurent Pinchart.
*
* TODO in order of priority:
* 1) Rotation
* 2) Cropping
* 3) V4L2_CID_JPEG_ACTIVE_MARKER
*/
#include <linux/unaligned.h>
#include <linux/clk.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <linux/string.h>
#include <linux/videodev2.h>
#include <media/jpeg.h>
#include <media/v4l2-ctrls.h>
#include <media/v4l2-device.h>
#include <media/v4l2-event.h>
#include <media/v4l2-fh.h>
#include <media/v4l2-mem2mem.h>
#include <media/v4l2-ioctl.h>
#include <media/videobuf2-v4l2.h>
#include <media/videobuf2-dma-contig.h>
#define DRV_NAME "rcar_jpu"
/*
* Align JPEG header end to cache line to make sure we will not have any issues
* with cache; additionally to requirement (33.3.27 R01UH0501EJ0100 Rev.1.00)
*/
#define JPU_JPEG_HDR_SIZE (ALIGN(0x258, L1_CACHE_BYTES))
#define JPU_JPEG_MAX_BYTES_PER_PIXEL 2 /* 16 bit precision format */
#define JPU_JPEG_MIN_SIZE 25 /* SOI + SOF + EOI */
#define JPU_JPEG_QTBL_SIZE 0x40
#define JPU_JPEG_HDCTBL_SIZE 0x1c
#define JPU_JPEG_HACTBL_SIZE 0xb2
#define JPU_JPEG_HEIGHT_OFFSET 0x91
#define JPU_JPEG_WIDTH_OFFSET 0x93
#define JPU_JPEG_SUBS_OFFSET 0x97
#define JPU_JPEG_QTBL_LUM_OFFSET 0x07
#define JPU_JPEG_QTBL_CHR_OFFSET 0x4c
#define JPU_JPEG_HDCTBL_LUM_OFFSET 0xa4
#define JPU_JPEG_HACTBL_LUM_OFFSET 0xc5
#define JPU_JPEG_HDCTBL_CHR_OFFSET 0x17c
#define JPU_JPEG_HACTBL_CHR_OFFSET 0x19d
#define JPU_JPEG_PADDING_OFFSET 0x24f
#define JPU_JPEG_LUM 0x00
#define JPU_JPEG_CHR 0x01
#define JPU_JPEG_DC 0x00
#define JPU_JPEG_AC 0x10
#define JPU_JPEG_422 0x21
#define JPU_JPEG_420 0x22
#define JPU_JPEG_DEFAULT_422_PIX_FMT V4L2_PIX_FMT_NV16M
#define JPU_JPEG_DEFAULT_420_PIX_FMT V4L2_PIX_FMT_NV12M
#define JPU_RESET_TIMEOUT 100 /* ms */
#define JPU_JOB_TIMEOUT 300 /* ms */
#define JPU_MAX_QUALITY 4
#define JPU_WIDTH_MIN 16
#define JPU_HEIGHT_MIN 16
#define JPU_WIDTH_MAX 4096
#define JPU_HEIGHT_MAX 4096
#define JPU_MEMALIGN 8
/* Flags that indicate a format can be used for capture/output */
#define JPU_FMT_TYPE_OUTPUT 0
#define JPU_FMT_TYPE_CAPTURE 1
#define JPU_ENC_CAPTURE (1 << 0)
#define JPU_ENC_OUTPUT (1 << 1)
#define JPU_DEC_CAPTURE (1 << 2)
#define JPU_DEC_OUTPUT (1 << 3)
/*
* JPEG registers and bits
*/
/* JPEG code mode register */
#define JCMOD 0x00
#define JCMOD_PCTR (1 << 7)
#define JCMOD_MSKIP_ENABLE (1 << 5)
#define JCMOD_DSP_ENC (0 << 3)
#define JCMOD_DSP_DEC (1 << 3)
#define JCMOD_REDU (7 << 0)
#define JCMOD_REDU_422 (1 << 0)
#define JCMOD_REDU_420 (2 << 0)
/* JPEG code command register */
#define JCCMD 0x04
#define JCCMD_SRST (1 << 12)
#define JCCMD_JEND (1 << 2)
#define JCCMD_JSRT (1 << 0)
/* JPEG code quantization table number register */
#define JCQTN 0x0c
#define JCQTN_SHIFT(t) (((t) - 1) << 1)
/* JPEG code Huffman table number register */
#define JCHTN 0x10
#define JCHTN_AC_SHIFT(t) (((t) << 1) - 1)
#define JCHTN_DC_SHIFT(t) (((t) - 1) << 1)
#define JCVSZU 0x1c /* JPEG code vertical size upper register */
#define JCVSZD 0x20 /* JPEG code vertical size lower register */
#define JCHSZU 0x24 /* JPEG code horizontal size upper register */
#define JCHSZD 0x28 /* JPEG code horizontal size lower register */
#define JCSZ_MASK 0xff /* JPEG code h/v size register contains only 1 byte*/
#define JCDTCU 0x2c /* JPEG code data count upper register */
#define JCDTCM 0x30 /* JPEG code data count middle register */
#define JCDTCD 0x34 /* JPEG code data count lower register */
/* JPEG interrupt enable register */
#define JINTE 0x38
#define JINTE_ERR (7 << 5) /* INT5 + INT6 + INT7 */
#define JINTE_TRANSF_COMPL (1 << 10)
/* JPEG interrupt status register */
#define JINTS 0x3c
#define JINTS_MASK 0x7c68
#define JINTS_ERR (1 << 5)
#define JINTS_PROCESS_COMPL (1 << 6)
#define JINTS_TRANSF_COMPL (1 << 10)
#define JCDERR 0x40 /* JPEG code decode error register */
#define JCDERR_MASK 0xf /* JPEG code decode error register mask*/
/* JPEG interface encoding */
#define JIFECNT 0x70
#define JIFECNT_INFT_422 0
#define JIFECNT_INFT_420 1
#define JIFECNT_SWAP_WB (3 << 4) /* to JPU */
#define JIFESYA1 0x74 /* encode source Y address register 1 */
#define JIFESCA1 0x78 /* encode source C address register 1 */
#define JIFESYA2 0x7c /* encode source Y address register 2 */
#define JIFESCA2 0x80 /* encode source C address register 2 */
#define JIFESMW 0x84 /* encode source memory width register */
#define JIFESVSZ 0x88 /* encode source vertical size register */
#define JIFESHSZ 0x8c /* encode source horizontal size register */
#define JIFEDA1 0x90 /* encode destination address register 1 */
#define JIFEDA2 0x94 /* encode destination address register 2 */
/* JPEG decoding control register */
#define JIFDCNT 0xa0
#define JIFDCNT_SWAP_WB (3 << 1) /* from JPU */
#define JIFDSA1 0xa4 /* decode source address register 1 */
#define JIFDDMW 0xb0 /* decode destination memory width register */
#define JIFDDVSZ 0xb4 /* decode destination vert. size register */
#define JIFDDHSZ 0xb8 /* decode destination horiz. size register */
#define JIFDDYA1 0xbc /* decode destination Y address register 1 */
#define JIFDDCA1 0xc0 /* decode destination C address register 1 */
#define JCQTBL(n) (0x10000 + (n) * 0x40) /* quantization tables regs */
#define JCHTBD(n) (0x10100 + (n) * 0x100) /* Huffman table DC regs */
#define JCHTBA(n) (0x10120 + (n) * 0x100) /* Huffman table AC regs */
/**
* struct jpu - JPEG IP abstraction
* @mutex: the mutex protecting this structure
* @lock: spinlock protecting the device contexts
* @v4l2_dev: v4l2 device for mem2mem mode
* @vfd_encoder: video device node for encoder mem2mem mode
* @vfd_decoder: video device node for decoder mem2mem mode
* @m2m_dev: v4l2 mem2mem device data
* @curr: pointer to current context
* @regs: JPEG IP registers mapping
* @irq: JPEG IP irq
* @clk: JPEG IP clock
* @dev: JPEG IP struct device
* @ref_count: reference counter
*/
struct jpu {
struct mutex mutex;
spinlock_t lock;
struct v4l2_device v4l2_dev;
struct video_device vfd_encoder;
struct video_device vfd_decoder;
struct v4l2_m2m_dev *m2m_dev;
struct jpu_ctx *curr;
void __iomem *regs;
unsigned int irq;
struct clk *clk;
struct device *dev;
int ref_count;
};
/**
* struct jpu_buffer - driver's specific video buffer
* @buf: m2m buffer
* @compr_quality: destination image quality in compression mode
* @subsampling: source image subsampling in decompression mode
*/
struct jpu_buffer {
struct v4l2_m2m_buffer buf;
unsigned short compr_quality;
unsigned char subsampling;
};
/**
* struct jpu_fmt - driver's internal format data
* @fourcc: the fourcc code, 0 if not applicable
* @colorspace: the colorspace specifier
* @bpp: number of bits per pixel per plane
* @h_align: horizontal alignment order (align to 2^h_align)
* @v_align: vertical alignment order (align to 2^v_align)
* @subsampling: (horizontal:4 | vertical:4) subsampling factor
* @num_planes: number of planes
* @types: types of queue this format is applicable to
*/
struct jpu_fmt {
u32 fourcc;
u32 colorspace;
u8 bpp[2];
u8 h_align;
u8 v_align;
u8 subsampling;
u8 num_planes;
u16 types;
};
/**
* struct jpu_q_data - parameters of one queue
* @fmtinfo: driver-specific format of this queue
* @format: multiplanar format of this queue
* @sequence: sequence number
*/
struct jpu_q_data {
struct jpu_fmt *fmtinfo;
struct v4l2_pix_format_mplane format;
unsigned int sequence;
};
/**
* struct jpu_ctx - the device context data
* @jpu: JPEG IP device for this context
* @encoder: compression (encode) operation or decompression (decode)
* @compr_quality: destination image quality in compression (encode) mode
* @out_q: source (output) queue information
* @cap_q: destination (capture) queue information
* @fh: file handler
* @ctrl_handler: controls handler
*/
struct jpu_ctx {
struct jpu *jpu;
bool encoder;
unsigned short compr_quality;
struct jpu_q_data out_q;
struct jpu_q_data cap_q;
struct v4l2_fh fh;
struct v4l2_ctrl_handler ctrl_handler;
};
/**
* jpeg_buffer - description of memory containing input JPEG data
* @end: end position in the buffer
* @curr: current position in the buffer
*/
struct jpeg_buffer {
void *end;
void *curr;
};
static struct jpu_fmt jpu_formats[] = {
{ V4L2_PIX_FMT_JPEG, V4L2_COLORSPACE_JPEG,
{0, 0}, 0, 0, 0, 1, JPU_ENC_CAPTURE | JPU_DEC_OUTPUT },
{ V4L2_PIX_FMT_NV16M, V4L2_COLORSPACE_SRGB,
{8, 8}, 2, 2, JPU_JPEG_422, 2, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
{ V4L2_PIX_FMT_NV12M, V4L2_COLORSPACE_SRGB,
{8, 4}, 2, 2, JPU_JPEG_420, 2, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
{ V4L2_PIX_FMT_NV16, V4L2_COLORSPACE_SRGB,
{16, 0}, 2, 2, JPU_JPEG_422, 1, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
{ V4L2_PIX_FMT_NV12, V4L2_COLORSPACE_SRGB,
{12, 0}, 2, 2, JPU_JPEG_420, 1, JPU_ENC_OUTPUT | JPU_DEC_CAPTURE },
};
static const u8 zigzag[] = {
0x03, 0x02, 0x0b, 0x13, 0x0a, 0x01, 0x00, 0x09,
0x12, 0x1b, 0x23, 0x1a, 0x11, 0x08, 0x07, 0x06,
0x0f, 0x10, 0x19, 0x22, 0x2b, 0x33, 0x2a, 0x21,
0x18, 0x17, 0x0e, 0x05, 0x04, 0x0d, 0x16, 0x1f,
0x20, 0x29, 0x32, 0x3b, 0x3a, 0x31, 0x28, 0x27,
0x1e, 0x15, 0x0e, 0x14, 0x10, 0x26, 0x2f, 0x30,
0x39, 0x38, 0x37, 0x2e, 0x25, 0x1c, 0x24, 0x2b,
0x36, 0x3f, 0x3e, 0x35, 0x2c, 0x34, 0x3d, 0x3c
};
#define QTBL_SIZE (ALIGN(JPU_JPEG_QTBL_SIZE, \
sizeof (unsigned int )) / sizeof (unsigned int ))
#define HDCTBL_SIZE (ALIGN(JPU_JPEG_HDCTBL_SIZE, \
sizeof (unsigned int )) / sizeof (unsigned int ))
#define HACTBL_SIZE (ALIGN(JPU_JPEG_HACTBL_SIZE, \
sizeof (unsigned int )) / sizeof (unsigned int ))
/*
* Start of image; Quantization tables
* SOF0 (17 bytes payload) is Baseline DCT - Sample precision, height, width,
* Number of image components, (Ci:8 - Hi:4 - Vi:4 - Tq:8) * 3 - Y,Cb,Cr;
* Huffman tables; Padding with 0xff (33.3.27 R01UH0501EJ0100 Rev.1.00)
*/
#define JPU_JPEG_HDR_BLOB { \
0xff, JPEG_MARKER_SOI, 0xff, JPEG_MARKER_DQT, 0x00, \
JPU_JPEG_QTBL_SIZE + 0x3, JPU_JPEG_LUM, \
[JPU_JPEG_QTBL_LUM_OFFSET ... \
JPU_JPEG_QTBL_LUM_OFFSET + JPU_JPEG_QTBL_SIZE - 1] = 0x00, \
0xff, JPEG_MARKER_DQT, 0x00, JPU_JPEG_QTBL_SIZE + 0x3, JPU_JPEG_CHR, \
[JPU_JPEG_QTBL_CHR_OFFSET ... JPU_JPEG_QTBL_CHR_OFFSET + \
JPU_JPEG_QTBL_SIZE - 1] = 0x00, \
0xff, JPEG_MARKER_SOF0, 0x00, 0x11, 0x08, \
[JPU_JPEG_HEIGHT_OFFSET ... JPU_JPEG_HEIGHT_OFFSET + 1] = 0x00, \
[JPU_JPEG_WIDTH_OFFSET ... JPU_JPEG_WIDTH_OFFSET + 1] = 0x00, \
0x03, 0x01, [JPU_JPEG_SUBS_OFFSET] = 0x00, JPU_JPEG_LUM, \
0x02, 0x11, JPU_JPEG_CHR, 0x03, 0x11, JPU_JPEG_CHR, \
0xff, JPEG_MARKER_DHT, 0x00, JPU_JPEG_HDCTBL_SIZE + 0x3, \
JPU_JPEG_LUM | JPU_JPEG_DC, \
[JPU_JPEG_HDCTBL_LUM_OFFSET ... \
JPU_JPEG_HDCTBL_LUM_OFFSET + JPU_JPEG_HDCTBL_SIZE - 1] = 0x00, \
0xff, JPEG_MARKER_DHT, 0x00, JPU_JPEG_HACTBL_SIZE + 0x3, \
JPU_JPEG_LUM | JPU_JPEG_AC, \
[JPU_JPEG_HACTBL_LUM_OFFSET ... \
JPU_JPEG_HACTBL_LUM_OFFSET + JPU_JPEG_HACTBL_SIZE - 1] = 0x00, \
0xff, JPEG_MARKER_DHT, 0x00, JPU_JPEG_HDCTBL_SIZE + 0x3, \
JPU_JPEG_CHR | JPU_JPEG_DC, \
[JPU_JPEG_HDCTBL_CHR_OFFSET ... \
JPU_JPEG_HDCTBL_CHR_OFFSET + JPU_JPEG_HDCTBL_SIZE - 1] = 0x00, \
0xff, JPEG_MARKER_DHT, 0x00, JPU_JPEG_HACTBL_SIZE + 0x3, \
JPU_JPEG_CHR | JPU_JPEG_AC, \
[JPU_JPEG_HACTBL_CHR_OFFSET ... \
JPU_JPEG_HACTBL_CHR_OFFSET + JPU_JPEG_HACTBL_SIZE - 1] = 0x00, \
[JPU_JPEG_PADDING_OFFSET ... JPU_JPEG_HDR_SIZE - 1] = 0xff \
}
static unsigned char jpeg_hdrs[JPU_MAX_QUALITY][JPU_JPEG_HDR_SIZE] = {
[0 ... JPU_MAX_QUALITY - 1] = JPU_JPEG_HDR_BLOB
};
static const unsigned int qtbl_lum[JPU_MAX_QUALITY][QTBL_SIZE] = {
{
0x14101927, 0x322e3e44, 0x10121726, 0x26354144,
0x19171f26, 0x35414444, 0x27262635, 0x41444444,
0x32263541, 0x44444444, 0x2e354144, 0x44444444,
0x3e414444, 0x44444444, 0x44444444, 0x44444444
},
{
0x100b0b10, 0x171b1f1e, 0x0b0c0c0f, 0x1417171e,
0x0b0c0d10, 0x171a232f, 0x100f1017, 0x1a252f40,
0x1714171a, 0x27334040, 0x1b171a25, 0x33404040,
0x1f17232f, 0x40404040, 0x1e1e2f40, 0x40404040
},
{
0x0c08080c, 0x11151817, 0x0809090b, 0x0f131217,
0x08090a0c, 0x13141b24, 0x0c0b0c15, 0x141c2435,
0x110f1314, 0x1e27333b, 0x1513141c, 0x27333b3b,
0x18121b24, 0x333b3b3b, 0x17172435, 0x3b3b3b3b
},
{
0x08060608, 0x0c0e1011, 0x06060608, 0x0a0d0c0f,
0x06060708, 0x0d0e1218, 0x0808080e, 0x0d131823,
0x0c0a0d0d, 0x141a2227, 0x0e0d0e13, 0x1a222727,
0x100c1318, 0x22272727, 0x110f1823, 0x27272727
}
};
static const unsigned int qtbl_chr[JPU_MAX_QUALITY][QTBL_SIZE] = {
{
0x15192026, 0x36444444, 0x191c1826, 0x36444444,
0x2018202b, 0x42444444, 0x26262b35, 0x44444444,
0x36424444, 0x44444444, 0x44444444, 0x44444444,
0x44444444, 0x44444444, 0x44444444, 0x44444444
},
{
0x110f1115, 0x141a2630, 0x0f131211, 0x141a232b,
0x11121416, 0x1a1e2e35, 0x1511161c, 0x1e273540,
0x14141a1e, 0x27304040, 0x1a1a1e27, 0x303f4040,
0x26232e35, 0x40404040, 0x302b3540, 0x40404040
},
{
0x0d0b0d10, 0x14141d25, 0x0b0e0e0e, 0x10141a20,
0x0d0e0f11, 0x14172328, 0x100e1115, 0x171e2832,
0x14101417, 0x1e25323b, 0x1414171e, 0x25303b3b,
0x1d1a2328, 0x323b3b3b, 0x25202832, 0x3b3b3b3b
},
{
0x0908090b, 0x0e111318, 0x080a090b, 0x0e0d1116,
0x09090d0e, 0x0d0f171a, 0x0b0b0e0e, 0x0f141a21,
0x0e0e0d0f, 0x14182127, 0x110d0f14, 0x18202727,
0x1311171a, 0x21272727, 0x18161a21, 0x27272727
}
};
static const unsigned int hdctbl_lum[HDCTBL_SIZE] = {
0x00010501, 0x01010101, 0x01000000, 0x00000000,
0x00010203, 0x04050607, 0x08090a0b
};
static const unsigned int hdctbl_chr[HDCTBL_SIZE] = {
0x00010501, 0x01010101, 0x01000000, 0x00000000,
0x00010203, 0x04050607, 0x08090a0b
};
static const unsigned int hactbl_lum[HACTBL_SIZE] = {
0x00020103, 0x03020403, 0x05050404, 0x0000017d, 0x01020300, 0x04110512,
0x21314106, 0x13516107, 0x22711432, 0x8191a108, 0x2342b1c1, 0x1552d1f0,
0x24336272, 0x82090a16, 0x1718191a, 0x25262728, 0x292a3435, 0x36373839,
0x3a434445, 0x46474849, 0x4a535455, 0x56575859, 0x5a636465, 0x66676869,
0x6a737475, 0x76777879, 0x7a838485, 0x86878889, 0x8a929394, 0x95969798,
0x999aa2a3, 0xa4a5a6a7, 0xa8a9aab2, 0xb3b4b5b6, 0xb7b8b9ba, 0xc2c3c4c5,
0xc6c7c8c9, 0xcad2d3d4, 0xd5d6d7d8, 0xd9dae1e2, 0xe3e4e5e6, 0xe7e8e9ea,
0xf1f2f3f4, 0xf5f6f7f8, 0xf9fa0000
};
static const unsigned int hactbl_chr[HACTBL_SIZE] = {
0x00020103, 0x03020403, 0x05050404, 0x0000017d, 0x01020300, 0x04110512,
0x21314106, 0x13516107, 0x22711432, 0x8191a108, 0x2342b1c1, 0x1552d1f0,
0x24336272, 0x82090a16, 0x1718191a, 0x25262728, 0x292a3435, 0x36373839,
0x3a434445, 0x46474849, 0x4a535455, 0x56575859, 0x5a636465, 0x66676869,
0x6a737475, 0x76777879, 0x7a838485, 0x86878889, 0x8a929394, 0x95969798,
0x999aa2a3, 0xa4a5a6a7, 0xa8a9aab2, 0xb3b4b5b6, 0xb7b8b9ba, 0xc2c3c4c5,
0xc6c7c8c9, 0xcad2d3d4, 0xd5d6d7d8, 0xd9dae1e2, 0xe3e4e5e6, 0xe7e8e9ea,
0xf1f2f3f4, 0xf5f6f7f8, 0xf9fa0000
};
static const char *error_to_text[16] = {
"Normal" ,
"SOI not detected" ,
"SOF1 to SOFF detected" ,
"Subsampling not detected" ,
"SOF accuracy error" ,
"DQT accuracy error" ,
"Component error 1" ,
"Component error 2" ,
"SOF0, DQT, and DHT not detected when SOS detected" ,
"SOS not detected" ,
"EOI not detected" ,
"Restart interval data number error detected" ,
"Image size error" ,
"Last MCU data number error" ,
"Block data number error" ,
"Unknown"
};
static struct jpu_buffer *vb2_to_jpu_buffer(struct vb2_v4l2_buffer *vb)
{
struct v4l2_m2m_buffer *b =
container_of(vb, struct v4l2_m2m_buffer, vb);
return container_of(b, struct jpu_buffer, buf);
}
static u32 jpu_read(struct jpu *jpu, unsigned int reg)
{
return ioread32(jpu->regs + reg);
}
static void jpu_write(struct jpu *jpu, u32 val, unsigned int reg)
{
iowrite32(val, jpu->regs + reg);
}
static struct jpu_ctx *ctrl_to_ctx(struct v4l2_ctrl *c)
{
return container_of(c->handler, struct jpu_ctx, ctrl_handler);
}
static struct jpu_ctx *fh_to_ctx(struct v4l2_fh *fh)
{
return container_of(fh, struct jpu_ctx, fh);
}
static void jpu_set_tbl(struct jpu *jpu, u32 reg, const unsigned int *tbl,
unsigned int len) {
unsigned int i;
for (i = 0; i < len; i++)
jpu_write(jpu, tbl[i], reg + (i << 2));
}
static void jpu_set_qtbl(struct jpu *jpu, unsigned short quality)
{
jpu_set_tbl(jpu, JCQTBL(0), qtbl_lum[quality], QTBL_SIZE);
jpu_set_tbl(jpu, JCQTBL(1), qtbl_chr[quality], QTBL_SIZE);
}
static void jpu_set_htbl(struct jpu *jpu)
{
jpu_set_tbl(jpu, JCHTBD(0), hdctbl_lum, HDCTBL_SIZE);
jpu_set_tbl(jpu, JCHTBA(0), hactbl_lum, HACTBL_SIZE);
jpu_set_tbl(jpu, JCHTBD(1), hdctbl_chr, HDCTBL_SIZE);
jpu_set_tbl(jpu, JCHTBA(1), hactbl_chr, HACTBL_SIZE);
}
static int jpu_wait_reset(struct jpu *jpu)
{
unsigned long timeout;
timeout = jiffies + msecs_to_jiffies(JPU_RESET_TIMEOUT);
while (jpu_read(jpu, JCCMD) & JCCMD_SRST) {
if (time_after(jiffies, timeout)) {
dev_err(jpu->dev, "timed out in reset\n" );
return -ETIMEDOUT;
}
schedule();
}
return 0;
}
static int jpu_reset(struct jpu *jpu)
{
jpu_write(jpu, JCCMD_SRST, JCCMD);
return jpu_wait_reset(jpu);
}
/*
* ============================================================================
* video ioctl operations
* ============================================================================
*/
static void put_qtbl(u8 *p, const u8 *qtbl)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(zigzag); i++)
p[i] = *(qtbl + zigzag[i]);
}
static void put_htbl(u8 *p, const u8 *htbl, unsigned int len)
{
unsigned int i, j;
for (i = 0; i < len; i += 4)
for (j = 0; j < 4 && (i + j) < len; ++j)
p[i + j] = htbl[i + 3 - j];
}
static void jpu_generate_hdr(unsigned short quality, unsigned char *p)
{
put_qtbl(p + JPU_JPEG_QTBL_LUM_OFFSET, (const u8 *)qtbl_lum[quality]);
put_qtbl(p + JPU_JPEG_QTBL_CHR_OFFSET, (const u8 *)qtbl_chr[quality]);
put_htbl(p + JPU_JPEG_HDCTBL_LUM_OFFSET, (const u8 *)hdctbl_lum,
JPU_JPEG_HDCTBL_SIZE);
put_htbl(p + JPU_JPEG_HACTBL_LUM_OFFSET, (const u8 *)hactbl_lum,
JPU_JPEG_HACTBL_SIZE);
put_htbl(p + JPU_JPEG_HDCTBL_CHR_OFFSET, (const u8 *)hdctbl_chr,
JPU_JPEG_HDCTBL_SIZE);
put_htbl(p + JPU_JPEG_HACTBL_CHR_OFFSET, (const u8 *)hactbl_chr,
JPU_JPEG_HACTBL_SIZE);
}
static int get_byte(struct jpeg_buffer *buf)
{
if (buf->curr >= buf->end)
return -1;
return *(u8 *)buf->curr++;
}
static int get_word_be(struct jpeg_buffer *buf, unsigned int *word)
{
if (buf->end - buf->curr < 2)
return -1;
*word = get_unaligned_be16(buf->curr);
buf->curr += 2;
return 0;
}
static void skip(struct jpeg_buffer *buf, unsigned long len)
{
buf->curr += min((unsigned long )(buf->end - buf->curr), len);
}
static u8 jpu_parse_hdr(void *buffer, unsigned long size, unsigned int *width,
unsigned int *height)
{
struct jpeg_buffer jpeg_buffer;
unsigned int word;
bool soi = false ;
jpeg_buffer.end = buffer + size;
jpeg_buffer.curr = buffer;
/*
* basic size check and EOI - we don't want to let JPU cross
* buffer bounds in any case. Hope it's stopping by EOI.
*/
if (size < JPU_JPEG_MIN_SIZE ||
*(u8 *)(buffer + size - 1) != JPEG_MARKER_EOI)
return 0;
for (;;) {
int c;
/* skip preceding filler bytes */
do
c = get_byte(&jpeg_buffer);
while (c == 0xff || c == 0);
if (!soi && c == JPEG_MARKER_SOI) {
soi = true ;
continue ;
} else if (soi != (c != JPEG_MARKER_SOI))
return 0;
switch (c) {
case JPEG_MARKER_SOF0: /* SOF0: baseline JPEG */
skip(&jpeg_buffer, 3); /* segment length and bpp */
if (get_word_be(&jpeg_buffer, height) ||
get_word_be(&jpeg_buffer, width) ||
get_byte(&jpeg_buffer) != 3) /* YCbCr only */
return 0;
skip(&jpeg_buffer, 1);
return get_byte(&jpeg_buffer);
case JPEG_MARKER_DHT:
case JPEG_MARKER_DQT:
case JPEG_MARKER_COM:
case JPEG_MARKER_DRI:
case JPEG_MARKER_APP0 ... JPEG_MARKER_APP0 + 0x0f:
if (get_word_be(&jpeg_buffer, &word))
return 0;
skip(&jpeg_buffer, (long )word - 2);
break ;
case 0:
break ;
default :
return 0;
}
}
return 0;
}
static int jpu_querycap(struct file *file, void *priv,
struct v4l2_capability *cap)
{
struct jpu_ctx *ctx = fh_to_ctx(priv);
if (ctx->encoder)
strscpy(cap->card, DRV_NAME " encoder" , sizeof (cap->card));
else
strscpy(cap->card, DRV_NAME " decoder" , sizeof (cap->card));
strscpy(cap->driver, DRV_NAME, sizeof (cap->driver));
memset(cap->reserved, 0, sizeof (cap->reserved));
return 0;
}
static struct jpu_fmt *jpu_find_format(bool encoder, u32 pixelformat,
unsigned int fmt_type)
{
unsigned int i, fmt_flag;
if (encoder)
fmt_flag = fmt_type == JPU_FMT_TYPE_OUTPUT ? JPU_ENC_OUTPUT :
JPU_ENC_CAPTURE;
else
fmt_flag = fmt_type == JPU_FMT_TYPE_OUTPUT ? JPU_DEC_OUTPUT :
JPU_DEC_CAPTURE;
for (i = 0; i < ARRAY_SIZE(jpu_formats); i++) {
struct jpu_fmt *fmt = &jpu_formats[i];
if (fmt->fourcc == pixelformat && fmt->types & fmt_flag)
return fmt;
}
return NULL;
}
static int jpu_enum_fmt(struct v4l2_fmtdesc *f, u32 type)
{
unsigned int i, num = 0;
for (i = 0; i < ARRAY_SIZE(jpu_formats); ++i) {
if (jpu_formats[i].types & type) {
if (num == f->index)
break ;
++num;
}
}
if (i >= ARRAY_SIZE(jpu_formats))
return -EINVAL;
f->pixelformat = jpu_formats[i].fourcc;
return 0;
}
static int jpu_enum_fmt_cap(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct jpu_ctx *ctx = fh_to_ctx(priv);
return jpu_enum_fmt(f, ctx->encoder ? JPU_ENC_CAPTURE :
JPU_DEC_CAPTURE);
}
static int jpu_enum_fmt_out(struct file *file, void *priv,
struct v4l2_fmtdesc *f)
{
struct jpu_ctx *ctx = fh_to_ctx(priv);
return jpu_enum_fmt(f, ctx->encoder ? JPU_ENC_OUTPUT : JPU_DEC_OUTPUT);
}
static struct jpu_q_data *jpu_get_q_data(struct jpu_ctx *ctx,
enum v4l2_buf_type type)
{
if (V4L2_TYPE_IS_OUTPUT(type))
return &ctx->out_q;
else
return &ctx->cap_q;
}
static void jpu_bound_align_image(u32 *w, unsigned int w_min,
unsigned int w_max, unsigned int w_align,
u32 *h, unsigned int h_min,
unsigned int h_max, unsigned int h_align)
{
unsigned int width, height, w_step, h_step;
width = *w;
height = *h;
w_step = 1U << w_align;
h_step = 1U << h_align;
v4l_bound_align_image(w, w_min, w_max, w_align, h, h_min, h_max,
h_align, 3);
if (*w < width && *w + w_step < w_max)
*w += w_step;
if (*h < height && *h + h_step < h_max)
*h += h_step;
}
static int __jpu_try_fmt(struct jpu_ctx *ctx, struct jpu_fmt **fmtinfo,
struct v4l2_pix_format_mplane *pix,
enum v4l2_buf_type type)
{
struct jpu_fmt *fmt;
unsigned int f_type, w, h;
f_type = V4L2_TYPE_IS_OUTPUT(type) ? JPU_FMT_TYPE_OUTPUT :
JPU_FMT_TYPE_CAPTURE;
fmt = jpu_find_format(ctx->encoder, pix->pixelformat, f_type);
if (!fmt) {
unsigned int pixelformat;
dev_dbg(ctx->jpu->dev, "unknown format; set default format\n" );
if (ctx->encoder)
pixelformat = f_type == JPU_FMT_TYPE_OUTPUT ?
V4L2_PIX_FMT_NV16M : V4L2_PIX_FMT_JPEG;
else
pixelformat = f_type == JPU_FMT_TYPE_CAPTURE ?
V4L2_PIX_FMT_NV16M : V4L2_PIX_FMT_JPEG;
fmt = jpu_find_format(ctx->encoder, pixelformat, f_type);
}
pix->pixelformat = fmt->fourcc;
pix->colorspace = fmt->colorspace;
pix->field = V4L2_FIELD_NONE;
pix->num_planes = fmt->num_planes;
jpu_bound_align_image(&pix->width, JPU_WIDTH_MIN, JPU_WIDTH_MAX,
fmt->h_align, &pix->height, JPU_HEIGHT_MIN,
JPU_HEIGHT_MAX, fmt->v_align);
w = pix->width;
h = pix->height;
if (fmt->fourcc == V4L2_PIX_FMT_JPEG) {
/* ignore userspaces's sizeimage for encoding */
if (pix->plane_fmt[0].sizeimage <= 0 || ctx->encoder)
pix->plane_fmt[0].sizeimage = JPU_JPEG_HDR_SIZE +
(JPU_JPEG_MAX_BYTES_PER_PIXEL * w * h);
pix->plane_fmt[0].bytesperline = 0;
} else {
unsigned int i, bpl = 0;
for (i = 0; i < pix->num_planes; ++i)
bpl = max(bpl, pix->plane_fmt[i].bytesperline);
bpl = clamp_t(unsigned int , bpl, w, JPU_WIDTH_MAX);
bpl = round_up(bpl, JPU_MEMALIGN);
for (i = 0; i < pix->num_planes; ++i) {
pix->plane_fmt[i].bytesperline = bpl;
pix->plane_fmt[i].sizeimage = bpl * h * fmt->bpp[i] / 8;
}
}
if (fmtinfo)
*fmtinfo = fmt;
return 0;
}
static int jpu_try_fmt(struct file *file, void *priv, struct v4l2_format *f)
{
struct jpu_ctx *ctx = fh_to_ctx(priv);
if (!v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type))
return -EINVAL;
return __jpu_try_fmt(ctx, NULL, &f->fmt.pix_mp, f->type);
}
static int jpu_s_fmt(struct file *file, void *priv, struct v4l2_format *f)
{
struct vb2_queue *vq;
struct jpu_ctx *ctx = fh_to_ctx(priv);
struct v4l2_m2m_ctx *m2m_ctx = ctx->fh.m2m_ctx;
struct jpu_fmt *fmtinfo;
struct jpu_q_data *q_data;
int ret;
vq = v4l2_m2m_get_vq(m2m_ctx, f->type);
if (!vq)
return -EINVAL;
if (vb2_is_busy(vq)) {
v4l2_err(&ctx->jpu->v4l2_dev, "%s queue busy\n" , __func__);
return -EBUSY;
}
ret = __jpu_try_fmt(ctx, &fmtinfo, &f->fmt.pix_mp, f->type);
if (ret < 0)
return ret;
q_data = jpu_get_q_data(ctx, f->type);
q_data->format = f->fmt.pix_mp;
q_data->fmtinfo = fmtinfo;
return 0;
}
static int jpu_g_fmt(struct file *file, void *priv, struct v4l2_format *f)
{
struct jpu_q_data *q_data;
struct jpu_ctx *ctx = fh_to_ctx(priv);
if (!v4l2_m2m_get_vq(ctx->fh.m2m_ctx, f->type))
return -EINVAL;
q_data = jpu_get_q_data(ctx, f->type);
f->fmt.pix_mp = q_data->format;
return 0;
}
/*
* V4L2 controls
*/
static int jpu_s_ctrl(struct v4l2_ctrl *ctrl)
{
struct jpu_ctx *ctx = ctrl_to_ctx(ctrl);
unsigned long flags;
spin_lock_irqsave(&ctx->jpu->lock, flags);
if (ctrl->id == V4L2_CID_JPEG_COMPRESSION_QUALITY)
ctx->compr_quality = ctrl->val;
spin_unlock_irqrestore(&ctx->jpu->lock, flags);
return 0;
}
static const struct v4l2_ctrl_ops jpu_ctrl_ops = {
.s_ctrl = jpu_s_ctrl,
};
static int jpu_streamon(struct file *file, void *priv, enum v4l2_buf_type type)
{
struct jpu_ctx *ctx = fh_to_ctx(priv);
struct jpu_q_data *src_q_data, *dst_q_data, *orig, adj, *ref;
enum v4l2_buf_type adj_type;
src_q_data = jpu_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
dst_q_data = jpu_get_q_data(ctx, V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
if (ctx->encoder) {
adj = *src_q_data;
orig = src_q_data;
ref = dst_q_data;
adj_type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
} else {
adj = *dst_q_data;
orig = dst_q_data;
ref = src_q_data;
adj_type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
}
adj.format.width = ref->format.width;
adj.format.height = ref->format.height;
__jpu_try_fmt(ctx, NULL, &adj.format, adj_type);
if (adj.format.width != orig->format.width ||
adj.format.height != orig->format.height) {
dev_err(ctx->jpu->dev, "src and dst formats do not match.\n" );
/* maybe we can return -EPIPE here? */
return -EINVAL;
}
return v4l2_m2m_streamon(file, ctx->fh.m2m_ctx, type);
}
static const struct v4l2_ioctl_ops jpu_ioctl_ops = {
.vidioc_querycap = jpu_querycap,
.vidioc_enum_fmt_vid_cap = jpu_enum_fmt_cap,
.vidioc_enum_fmt_vid_out = jpu_enum_fmt_out,
.vidioc_g_fmt_vid_cap_mplane = jpu_g_fmt,
.vidioc_g_fmt_vid_out_mplane = jpu_g_fmt,
.vidioc_try_fmt_vid_cap_mplane = jpu_try_fmt,
.vidioc_try_fmt_vid_out_mplane = jpu_try_fmt,
.vidioc_s_fmt_vid_cap_mplane = jpu_s_fmt,
.vidioc_s_fmt_vid_out_mplane = jpu_s_fmt,
.vidioc_reqbufs = v4l2_m2m_ioctl_reqbufs,
.vidioc_create_bufs = v4l2_m2m_ioctl_create_bufs,
.vidioc_querybuf = v4l2_m2m_ioctl_querybuf,
.vidioc_qbuf = v4l2_m2m_ioctl_qbuf,
.vidioc_dqbuf = v4l2_m2m_ioctl_dqbuf,
.vidioc_expbuf = v4l2_m2m_ioctl_expbuf,
.vidioc_streamon = jpu_streamon,
.vidioc_streamoff = v4l2_m2m_ioctl_streamoff,
.vidioc_subscribe_event = v4l2_ctrl_subscribe_event,
.vidioc_unsubscribe_event = v4l2_event_unsubscribe
};
static int jpu_controls_create(struct jpu_ctx *ctx)
{
struct v4l2_ctrl *ctrl;
int ret;
v4l2_ctrl_handler_init(&ctx->ctrl_handler, 1);
ctrl = v4l2_ctrl_new_std(&ctx->ctrl_handler, &jpu_ctrl_ops,
V4L2_CID_JPEG_COMPRESSION_QUALITY,
0, JPU_MAX_QUALITY - 1, 1, 0);
if (ctx->ctrl_handler.error) {
ret = ctx->ctrl_handler.error;
goto error_free;
}
if (!ctx->encoder)
ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE |
V4L2_CTRL_FLAG_READ_ONLY;
ret = v4l2_ctrl_handler_setup(&ctx->ctrl_handler);
if (ret < 0)
goto error_free;
return 0;
error_free:
v4l2_ctrl_handler_free(&ctx->ctrl_handler);
return ret;
}
/*
* ============================================================================
* Queue operations
* ============================================================================
*/
static int jpu_queue_setup(struct vb2_queue *vq,
unsigned int *nbuffers, unsigned int *nplanes,
unsigned int sizes[], struct device *alloc_devs[])
{
struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
struct jpu_q_data *q_data;
unsigned int i;
q_data = jpu_get_q_data(ctx, vq->type);
if (*nplanes) {
if (*nplanes != q_data->format.num_planes)
return -EINVAL;
for (i = 0; i < *nplanes; i++) {
unsigned int q_size = q_data->format.plane_fmt[i].sizeimage;
if (sizes[i] < q_size)
return -EINVAL;
}
return 0;
}
*nplanes = q_data->format.num_planes;
for (i = 0; i < *nplanes; i++)
sizes[i] = q_data->format.plane_fmt[i].sizeimage;
return 0;
}
static int jpu_buf_prepare(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct jpu_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct jpu_q_data *q_data;
unsigned int i;
q_data = jpu_get_q_data(ctx, vb->vb2_queue->type);
if (V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
if (vbuf->field == V4L2_FIELD_ANY)
vbuf->field = V4L2_FIELD_NONE;
if (vbuf->field != V4L2_FIELD_NONE) {
dev_err(ctx->jpu->dev, "%s field isn't supported\n" ,
__func__);
return -EINVAL;
}
}
for (i = 0; i < q_data->format.num_planes; i++) {
unsigned long size = q_data->format.plane_fmt[i].sizeimage;
if (vb2_plane_size(vb, i) < size) {
dev_err(ctx->jpu->dev,
"%s: data will not fit into plane (%lu < %lu)\n" ,
__func__, vb2_plane_size(vb, i), size);
return -EINVAL;
}
/* decoder capture queue */
if (!ctx->encoder && V4L2_TYPE_IS_CAPTURE(vb->vb2_queue->type))
vb2_set_plane_payload(vb, i, size);
}
return 0;
}
static void jpu_buf_queue(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct jpu_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
if (!ctx->encoder && V4L2_TYPE_IS_OUTPUT(vb->vb2_queue->type)) {
struct jpu_buffer *jpu_buf = vb2_to_jpu_buffer(vbuf);
struct jpu_q_data *q_data, adjust;
void *buffer = vb2_plane_vaddr(vb, 0);
unsigned long buf_size = vb2_get_plane_payload(vb, 0);
unsigned int width, height;
u8 subsampling = jpu_parse_hdr(buffer, buf_size, &width,
&height);
/* check if JPEG data basic parsing was successful */
if (subsampling != JPU_JPEG_422 && subsampling != JPU_JPEG_420)
goto format_error;
q_data = &ctx->out_q;
adjust = *q_data;
adjust.format.width = width;
adjust.format.height = height;
__jpu_try_fmt(ctx, &adjust.fmtinfo, &adjust.format,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
if (adjust.format.width != q_data->format.width ||
adjust.format.height != q_data->format.height)
goto format_error;
/*
* keep subsampling in buffer to check it
* for compatibility in device_run
*/
jpu_buf->subsampling = subsampling;
}
if (ctx->fh.m2m_ctx)
v4l2_m2m_buf_queue(ctx->fh.m2m_ctx, vbuf);
return ;
format_error:
dev_err(ctx->jpu->dev, "incompatible or corrupted JPEG data\n" );
vb2_buffer_done(vb, VB2_BUF_STATE_ERROR);
}
static void jpu_buf_finish(struct vb2_buffer *vb)
{
struct vb2_v4l2_buffer *vbuf = to_vb2_v4l2_buffer(vb);
struct jpu_buffer *jpu_buf = vb2_to_jpu_buffer(vbuf);
struct jpu_ctx *ctx = vb2_get_drv_priv(vb->vb2_queue);
struct jpu_q_data *q_data = &ctx->out_q;
enum v4l2_buf_type type = vb->vb2_queue->type;
u8 *buffer;
if (vb->state == VB2_BUF_STATE_DONE)
vbuf->sequence = jpu_get_q_data(ctx, type)->sequence++;
if (!ctx->encoder || vb->state != VB2_BUF_STATE_DONE ||
V4L2_TYPE_IS_OUTPUT(type))
return ;
buffer = vb2_plane_vaddr(vb, 0);
memcpy(buffer, jpeg_hdrs[jpu_buf->compr_quality], JPU_JPEG_HDR_SIZE);
*(__be16 *)(buffer + JPU_JPEG_HEIGHT_OFFSET) =
cpu_to_be16(q_data->format.height);
*(__be16 *)(buffer + JPU_JPEG_WIDTH_OFFSET) =
cpu_to_be16(q_data->format.width);
*(buffer + JPU_JPEG_SUBS_OFFSET) = q_data->fmtinfo->subsampling;
}
static int jpu_start_streaming(struct vb2_queue *vq, unsigned count)
{
struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
struct jpu_q_data *q_data = jpu_get_q_data(ctx, vq->type);
q_data->sequence = 0;
return 0;
}
static void jpu_stop_streaming(struct vb2_queue *vq)
{
struct jpu_ctx *ctx = vb2_get_drv_priv(vq);
struct vb2_v4l2_buffer *vb;
unsigned long flags;
for (;;) {
if (V4L2_TYPE_IS_OUTPUT(vq->type))
vb = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
else
vb = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
if (vb == NULL)
return ;
spin_lock_irqsave(&ctx->jpu->lock, flags);
v4l2_m2m_buf_done(vb, VB2_BUF_STATE_ERROR);
spin_unlock_irqrestore(&ctx->jpu->lock, flags);
}
}
static const struct vb2_ops jpu_qops = {
.queue_setup = jpu_queue_setup,
.buf_prepare = jpu_buf_prepare,
.buf_queue = jpu_buf_queue,
.buf_finish = jpu_buf_finish,
.start_streaming = jpu_start_streaming,
.stop_streaming = jpu_stop_streaming,
};
static int jpu_queue_init(void *priv, struct vb2_queue *src_vq,
struct vb2_queue *dst_vq)
{
struct jpu_ctx *ctx = priv;
int ret;
memset(src_vq, 0, sizeof (*src_vq));
src_vq->type = V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE;
src_vq->io_modes = VB2_MMAP | VB2_DMABUF;
src_vq->drv_priv = ctx;
src_vq->buf_struct_size = sizeof (struct jpu_buffer);
src_vq->ops = &jpu_qops;
src_vq->mem_ops = &vb2_dma_contig_memops;
src_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
src_vq->lock = &ctx->jpu->mutex;
src_vq->dev = ctx->jpu->v4l2_dev.dev;
ret = vb2_queue_init(src_vq);
if (ret)
return ret;
memset(dst_vq, 0, sizeof (*dst_vq));
dst_vq->type = V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE;
dst_vq->io_modes = VB2_MMAP | VB2_DMABUF;
dst_vq->drv_priv = ctx;
dst_vq->buf_struct_size = sizeof (struct jpu_buffer);
dst_vq->ops = &jpu_qops;
dst_vq->mem_ops = &vb2_dma_contig_memops;
dst_vq->timestamp_flags = V4L2_BUF_FLAG_TIMESTAMP_COPY;
dst_vq->lock = &ctx->jpu->mutex;
dst_vq->dev = ctx->jpu->v4l2_dev.dev;
return vb2_queue_init(dst_vq);
}
/*
* ============================================================================
* Device file operations
* ============================================================================
*/
static int jpu_open(struct file *file)
{
struct jpu *jpu = video_drvdata(file);
struct video_device *vfd = video_devdata(file);
struct jpu_ctx *ctx;
int ret;
ctx = kzalloc(sizeof (*ctx), GFP_KERNEL);
if (!ctx)
return -ENOMEM;
v4l2_fh_init(&ctx->fh, vfd);
ctx->fh.ctrl_handler = &ctx->ctrl_handler;
file->private_data = &ctx->fh;
v4l2_fh_add(&ctx->fh);
ctx->jpu = jpu;
ctx->encoder = vfd == &jpu->vfd_encoder;
__jpu_try_fmt(ctx, &ctx->out_q.fmtinfo, &ctx->out_q.format,
V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
__jpu_try_fmt(ctx, &ctx->cap_q.fmtinfo, &ctx->cap_q.format,
V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE);
ctx->fh.m2m_ctx = v4l2_m2m_ctx_init(jpu->m2m_dev, ctx, jpu_queue_init);
if (IS_ERR(ctx->fh.m2m_ctx)) {
ret = PTR_ERR(ctx->fh.m2m_ctx);
goto v4l_prepare_rollback;
}
ret = jpu_controls_create(ctx);
if (ret < 0)
goto v4l_prepare_rollback;
if (mutex_lock_interruptible(&jpu->mutex)) {
ret = -ERESTARTSYS;
goto v4l_prepare_rollback;
}
if (jpu->ref_count == 0) {
ret = clk_prepare_enable(jpu->clk);
if (ret < 0)
goto device_prepare_rollback;
/* ...issue software reset */
ret = jpu_reset(jpu);
if (ret)
goto jpu_reset_rollback;
}
jpu->ref_count++;
mutex_unlock(&jpu->mutex);
return 0;
jpu_reset_rollback:
clk_disable_unprepare(jpu->clk);
device_prepare_rollback:
mutex_unlock(&jpu->mutex);
v4l_prepare_rollback:
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
kfree(ctx);
return ret;
}
static int jpu_release(struct file *file)
{
struct jpu *jpu = video_drvdata(file);
struct jpu_ctx *ctx = fh_to_ctx(file->private_data);
v4l2_m2m_ctx_release(ctx->fh.m2m_ctx);
v4l2_ctrl_handler_free(&ctx->ctrl_handler);
v4l2_fh_del(&ctx->fh);
v4l2_fh_exit(&ctx->fh);
kfree(ctx);
mutex_lock(&jpu->mutex);
if (--jpu->ref_count == 0)
clk_disable_unprepare(jpu->clk);
mutex_unlock(&jpu->mutex);
return 0;
}
static const struct v4l2_file_operations jpu_fops = {
.owner = THIS_MODULE,
.open = jpu_open,
.release = jpu_release,
.unlocked_ioctl = video_ioctl2,
.poll = v4l2_m2m_fop_poll,
.mmap = v4l2_m2m_fop_mmap,
};
/*
* ============================================================================
* mem2mem callbacks
* ============================================================================
*/
static void jpu_cleanup(struct jpu_ctx *ctx, bool reset)
{
/* remove current buffers and finish job */
struct vb2_v4l2_buffer *src_buf, *dst_buf;
unsigned long flags;
spin_lock_irqsave(&ctx->jpu->lock, flags);
src_buf = v4l2_m2m_src_buf_remove(ctx->fh.m2m_ctx);
dst_buf = v4l2_m2m_dst_buf_remove(ctx->fh.m2m_ctx);
v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
/* ...and give it a chance on next run */
if (reset)
jpu_write(ctx->jpu, JCCMD_SRST, JCCMD);
spin_unlock_irqrestore(&ctx->jpu->lock, flags);
v4l2_m2m_job_finish(ctx->jpu->m2m_dev, ctx->fh.m2m_ctx);
}
static void jpu_device_run(void *priv)
{
struct jpu_ctx *ctx = priv;
struct jpu *jpu = ctx->jpu;
struct jpu_buffer *jpu_buf;
struct jpu_q_data *q_data;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
unsigned int w, h, bpl;
unsigned char num_planes, subsampling;
unsigned long flags;
/* ...wait until module reset completes; we have mutex locked here */
if (jpu_wait_reset(jpu)) {
jpu_cleanup(ctx, true );
return ;
}
spin_lock_irqsave(&ctx->jpu->lock, flags);
jpu->curr = ctx;
src_buf = v4l2_m2m_next_src_buf(ctx->fh.m2m_ctx);
dst_buf = v4l2_m2m_next_dst_buf(ctx->fh.m2m_ctx);
if (ctx->encoder) {
jpu_buf = vb2_to_jpu_buffer(dst_buf);
q_data = &ctx->out_q;
} else {
jpu_buf = vb2_to_jpu_buffer(src_buf);
q_data = &ctx->cap_q;
}
w = q_data->format.width;
h = q_data->format.height;
bpl = q_data->format.plane_fmt[0].bytesperline;
num_planes = q_data->fmtinfo->num_planes;
subsampling = q_data->fmtinfo->subsampling;
if (ctx->encoder) {
unsigned long src_1_addr, src_2_addr, dst_addr;
unsigned int redu, inft;
dst_addr = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
src_1_addr =
vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
if (num_planes > 1)
src_2_addr = vb2_dma_contig_plane_dma_addr(
&src_buf->vb2_buf, 1);
else
src_2_addr = src_1_addr + w * h;
jpu_buf->compr_quality = ctx->compr_quality;
if (subsampling == JPU_JPEG_420) {
redu = JCMOD_REDU_420;
inft = JIFECNT_INFT_420;
} else {
redu = JCMOD_REDU_422;
inft = JIFECNT_INFT_422;
}
/* only no marker mode works for encoding */
jpu_write(jpu, JCMOD_DSP_ENC | JCMOD_PCTR | redu |
JCMOD_MSKIP_ENABLE, JCMOD);
jpu_write(jpu, JIFECNT_SWAP_WB | inft, JIFECNT);
jpu_write(jpu, JIFDCNT_SWAP_WB, JIFDCNT);
jpu_write(jpu, JINTE_TRANSF_COMPL, JINTE);
/* Y and C components source addresses */
jpu_write(jpu, src_1_addr, JIFESYA1);
jpu_write(jpu, src_2_addr, JIFESCA1);
/* memory width */
jpu_write(jpu, bpl, JIFESMW);
jpu_write(jpu, (w >> 8) & JCSZ_MASK, JCHSZU);
jpu_write(jpu, w & JCSZ_MASK, JCHSZD);
jpu_write(jpu, (h >> 8) & JCSZ_MASK, JCVSZU);
jpu_write(jpu, h & JCSZ_MASK, JCVSZD);
jpu_write(jpu, w, JIFESHSZ);
jpu_write(jpu, h, JIFESVSZ);
jpu_write(jpu, dst_addr + JPU_JPEG_HDR_SIZE, JIFEDA1);
jpu_write(jpu, 0 << JCQTN_SHIFT(1) | 1 << JCQTN_SHIFT(2) |
1 << JCQTN_SHIFT(3), JCQTN);
jpu_write(jpu, 0 << JCHTN_AC_SHIFT(1) | 0 << JCHTN_DC_SHIFT(1) |
1 << JCHTN_AC_SHIFT(2) | 1 << JCHTN_DC_SHIFT(2) |
1 << JCHTN_AC_SHIFT(3) | 1 << JCHTN_DC_SHIFT(3),
JCHTN);
jpu_set_qtbl(jpu, ctx->compr_quality);
jpu_set_htbl(jpu);
} else {
unsigned long src_addr, dst_1_addr, dst_2_addr;
if (jpu_buf->subsampling != subsampling) {
dev_err(ctx->jpu->dev,
"src and dst formats do not match.\n" );
spin_unlock_irqrestore(&ctx->jpu->lock, flags);
jpu_cleanup(ctx, false );
return ;
}
src_addr = vb2_dma_contig_plane_dma_addr(&src_buf->vb2_buf, 0);
dst_1_addr =
vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
if (q_data->fmtinfo->num_planes > 1)
dst_2_addr = vb2_dma_contig_plane_dma_addr(
&dst_buf->vb2_buf, 1);
else
dst_2_addr = dst_1_addr + w * h;
/* ...set up decoder operation */
jpu_write(jpu, JCMOD_DSP_DEC | JCMOD_PCTR, JCMOD);
jpu_write(jpu, JIFECNT_SWAP_WB, JIFECNT);
jpu_write(jpu, JIFDCNT_SWAP_WB, JIFDCNT);
/* ...enable interrupts on transfer completion and d-g error */
jpu_write(jpu, JINTE_TRANSF_COMPL | JINTE_ERR, JINTE);
/* ...set source/destination addresses of encoded data */
jpu_write(jpu, src_addr, JIFDSA1);
jpu_write(jpu, dst_1_addr, JIFDDYA1);
jpu_write(jpu, dst_2_addr, JIFDDCA1);
jpu_write(jpu, bpl, JIFDDMW);
}
/* ...start encoder/decoder operation */
jpu_write(jpu, JCCMD_JSRT, JCCMD);
spin_unlock_irqrestore(&ctx->jpu->lock, flags);
}
static const struct v4l2_m2m_ops jpu_m2m_ops = {
.device_run = jpu_device_run,
};
/*
* ============================================================================
* IRQ handler
* ============================================================================
*/
static irqreturn_t jpu_irq_handler(int irq, void *dev_id)
{
struct jpu *jpu = dev_id;
struct jpu_ctx *curr_ctx;
struct vb2_v4l2_buffer *src_buf, *dst_buf;
unsigned int int_status;
int_status = jpu_read(jpu, JINTS);
/* ...spurious interrupt */
if (!((JINTS_TRANSF_COMPL | JINTS_PROCESS_COMPL | JINTS_ERR) &
int_status))
return IRQ_NONE;
/* ...clear interrupts */
jpu_write(jpu, ~(int_status & JINTS_MASK), JINTS);
if (int_status & (JINTS_ERR | JINTS_PROCESS_COMPL))
jpu_write(jpu, JCCMD_JEND, JCCMD);
spin_lock(&jpu->lock);
if ((int_status & JINTS_PROCESS_COMPL) &&
!(int_status & JINTS_TRANSF_COMPL))
goto handled;
curr_ctx = v4l2_m2m_get_curr_priv(jpu->m2m_dev);
if (!curr_ctx) {
/* ...instance is not running */
dev_err(jpu->dev, "no active context for m2m\n" );
goto handled;
}
src_buf = v4l2_m2m_src_buf_remove(curr_ctx->fh.m2m_ctx);
dst_buf = v4l2_m2m_dst_buf_remove(curr_ctx->fh.m2m_ctx);
if (int_status & JINTS_TRANSF_COMPL) {
if (curr_ctx->encoder) {
unsigned long payload_size = jpu_read(jpu, JCDTCU) << 16
| jpu_read(jpu, JCDTCM) << 8
| jpu_read(jpu, JCDTCD);
vb2_set_plane_payload(&dst_buf->vb2_buf, 0,
payload_size + JPU_JPEG_HDR_SIZE);
}
dst_buf->field = src_buf->field;
dst_buf->vb2_buf.timestamp = src_buf->vb2_buf.timestamp;
if (src_buf->flags & V4L2_BUF_FLAG_TIMECODE)
dst_buf->timecode = src_buf->timecode;
dst_buf->flags = src_buf->flags &
(V4L2_BUF_FLAG_TIMECODE | V4L2_BUF_FLAG_KEYFRAME |
V4L2_BUF_FLAG_PFRAME | V4L2_BUF_FLAG_BFRAME |
V4L2_BUF_FLAG_TSTAMP_SRC_MASK);
v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_DONE);
v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_DONE);
} else if (int_status & JINTS_ERR) {
unsigned char error = jpu_read(jpu, JCDERR) & JCDERR_MASK;
dev_dbg(jpu->dev, "processing error: %#X: %s\n" , error,
error_to_text[error]);
v4l2_m2m_buf_done(src_buf, VB2_BUF_STATE_ERROR);
v4l2_m2m_buf_done(dst_buf, VB2_BUF_STATE_ERROR);
}
jpu->curr = NULL;
/* ...reset JPU after completion */
jpu_write(jpu, JCCMD_SRST, JCCMD);
spin_unlock(&jpu->lock);
v4l2_m2m_job_finish(jpu->m2m_dev, curr_ctx->fh.m2m_ctx);
return IRQ_HANDLED;
handled:
spin_unlock(&jpu->lock);
return IRQ_HANDLED;
}
/*
* ============================================================================
* Driver basic infrastructure
* ============================================================================
*/
static const struct of_device_id jpu_dt_ids[] = {
{ .compatible = "renesas,jpu-r8a7790" }, /* H2 */
{ .compatible = "renesas,jpu-r8a7791" }, /* M2-W */
{ .compatible = "renesas,jpu-r8a7792" }, /* V2H */
{ .compatible = "renesas,jpu-r8a7793" }, /* M2-N */
{ .compatible = "renesas,rcar-gen2-jpu" },
{ },
};
MODULE_DEVICE_TABLE(of, jpu_dt_ids);
static int jpu_probe(struct platform_device *pdev)
{
struct jpu *jpu;
int ret;
unsigned int i;
jpu = devm_kzalloc(&pdev->dev, sizeof (*jpu), GFP_KERNEL);
if (!jpu)
return -ENOMEM;
mutex_init(&jpu->mutex);
spin_lock_init(&jpu->lock);
jpu->dev = &pdev->dev;
/* memory-mapped registers */
jpu->regs = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(jpu->regs))
return PTR_ERR(jpu->regs);
/* interrupt service routine registration */
jpu->irq = ret = platform_get_irq(pdev, 0);
if (ret < 0)
return ret;
ret = devm_request_irq(&pdev->dev, jpu->irq, jpu_irq_handler, 0,
dev_name(&pdev->dev), jpu);
if (ret) {
dev_err(&pdev->dev, "cannot claim IRQ %d\n" , jpu->irq);
return ret;
}
/* clocks */
jpu->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(jpu->clk)) {
dev_err(&pdev->dev, "cannot get clock\n" );
return PTR_ERR(jpu->clk);
}
/* v4l2 device */
ret = v4l2_device_register(&pdev->dev, &jpu->v4l2_dev);
if (ret) {
dev_err(&pdev->dev, "Failed to register v4l2 device\n" );
return ret;
}
/* mem2mem device */
jpu->m2m_dev = v4l2_m2m_init(&jpu_m2m_ops);
if (IS_ERR(jpu->m2m_dev)) {
v4l2_err(&jpu->v4l2_dev, "Failed to init mem2mem device\n" );
ret = PTR_ERR(jpu->m2m_dev);
goto device_register_rollback;
}
/* fill in quantization and Huffman tables for encoder */
for (i = 0; i < JPU_MAX_QUALITY; i++)
jpu_generate_hdr(i, (unsigned char *)jpeg_hdrs[i]);
strscpy(jpu->vfd_encoder.name, DRV_NAME, sizeof (jpu->vfd_encoder.name));
jpu->vfd_encoder.fops = &jpu_fops;
jpu->vfd_encoder.ioctl_ops = &jpu_ioctl_ops;
jpu->vfd_encoder.minor = -1;
jpu->vfd_encoder.release = video_device_release_empty;
jpu->vfd_encoder.lock = &jpu->mutex;
jpu->vfd_encoder.v4l2_dev = &jpu->v4l2_dev;
jpu->vfd_encoder.vfl_dir = VFL_DIR_M2M;
jpu->vfd_encoder.device_caps = V4L2_CAP_STREAMING |
V4L2_CAP_VIDEO_M2M_MPLANE;
ret = video_register_device(&jpu->vfd_encoder, VFL_TYPE_VIDEO, -1);
if (ret) {
v4l2_err(&jpu->v4l2_dev, "Failed to register video device\n" );
goto m2m_init_rollback;
}
video_set_drvdata(&jpu->vfd_encoder, jpu);
strscpy(jpu->vfd_decoder.name, DRV_NAME, sizeof (jpu->vfd_decoder.name));
jpu->vfd_decoder.fops = &jpu_fops;
jpu->vfd_decoder.ioctl_ops = &jpu_ioctl_ops;
jpu->vfd_decoder.minor = -1;
jpu->vfd_decoder.release = video_device_release_empty;
jpu->vfd_decoder.lock = &jpu->mutex;
jpu->vfd_decoder.v4l2_dev = &jpu->v4l2_dev;
jpu->vfd_decoder.vfl_dir = VFL_DIR_M2M;
jpu->vfd_decoder.device_caps = V4L2_CAP_STREAMING |
V4L2_CAP_VIDEO_M2M_MPLANE;
ret = video_register_device(&jpu->vfd_decoder, VFL_TYPE_VIDEO, -1);
if (ret) {
v4l2_err(&jpu->v4l2_dev, "Failed to register video device\n" );
goto enc_vdev_register_rollback;
}
video_set_drvdata(&jpu->vfd_decoder, jpu);
platform_set_drvdata(pdev, jpu);
v4l2_info(&jpu->v4l2_dev, "encoder device registered as /dev/video%d\n" ,
jpu->vfd_encoder.num);
v4l2_info(&jpu->v4l2_dev, "decoder device registered as /dev/video%d\n" ,
jpu->vfd_decoder.num);
return 0;
enc_vdev_register_rollback:
video_unregister_device(&jpu->vfd_encoder);
m2m_init_rollback:
v4l2_m2m_release(jpu->m2m_dev);
device_register_rollback:
v4l2_device_unregister(&jpu->v4l2_dev);
return ret;
}
static void jpu_remove(struct platform_device *pdev)
{
struct jpu *jpu = platform_get_drvdata(pdev);
video_unregister_device(&jpu->vfd_decoder);
video_unregister_device(&jpu->vfd_encoder);
v4l2_m2m_release(jpu->m2m_dev);
v4l2_device_unregister(&jpu->v4l2_dev);
}
#ifdef CONFIG_PM_SLEEP
static int jpu_suspend(struct device *dev)
{
struct jpu *jpu = dev_get_drvdata(dev);
if (jpu->ref_count == 0)
return 0;
clk_disable_unprepare(jpu->clk);
return 0;
}
static int jpu_resume(struct device *dev)
{
struct jpu *jpu = dev_get_drvdata(dev);
if (jpu->ref_count == 0)
return 0;
clk_prepare_enable(jpu->clk);
return 0;
}
#endif
static const struct dev_pm_ops jpu_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(jpu_suspend, jpu_resume)
};
static struct platform_driver jpu_driver = {
.probe = jpu_probe,
.remove = jpu_remove,
.driver = {
.of_match_table = jpu_dt_ids,
.name = DRV_NAME,
.pm = &jpu_pm_ops,
},
};
module_platform_driver(jpu_driver);
MODULE_ALIAS("platform:" DRV_NAME);
MODULE_AUTHOR("Mikhail Ulianov " );
MODULE_DESCRIPTION("Renesas R-Car JPEG processing unit driver" );
MODULE_LICENSE("GPL v2" );
Messung V0.5 C=94 H=93 G=93
¤ Dauer der Verarbeitung: 0.8 Sekunden
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