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gem5 / arm / linux / 132d358b183ac6ad8b3fea32ad5e0663456d18d1 / . / drivers / staging / media / omap4iss / iss_csi2.c
blob: f6acc541e8a200b9d8110e41c5e30badbcfb7bbe [file] [log] [blame]
/*
* TI OMAP4 ISS V4L2 Driver - CSI PHY module
*
* Copyright (C) 2012 Texas Instruments, Inc.
*
* Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*/
#include <linux/delay.h>
#include <media/v4l2-common.h>
#include <linux/v4l2-mediabus.h>
#include <linux/mm.h>
#include "iss.h"
#include "iss_regs.h"
#include "iss_csi2.h"
/*
* csi2_if_enable - Enable CSI2 Receiver interface.
* @enable: enable flag
*
*/
static void csi2_if_enable(struct iss_csi2_device *csi2, u8 enable)
{
struct iss_csi2_ctrl_cfg *currctrl = &csi2->ctrl;
iss_reg_update(csi2->iss, csi2->regs1, CSI2_CTRL, CSI2_CTRL_IF_EN,
enable ? CSI2_CTRL_IF_EN : 0);
currctrl->if_enable = enable;
}
/*
* csi2_recv_config - CSI2 receiver module configuration.
* @currctrl: iss_csi2_ctrl_cfg structure
*
*/
static void csi2_recv_config(struct iss_csi2_device *csi2,
struct iss_csi2_ctrl_cfg *currctrl)
{
u32 reg = 0;
if (currctrl->frame_mode)
reg |= CSI2_CTRL_FRAME;
else
reg &= ~CSI2_CTRL_FRAME;
if (currctrl->vp_clk_enable)
reg |= CSI2_CTRL_VP_CLK_EN;
else
reg &= ~CSI2_CTRL_VP_CLK_EN;
if (currctrl->vp_only_enable)
reg |= CSI2_CTRL_VP_ONLY_EN;
else
reg &= ~CSI2_CTRL_VP_ONLY_EN;
reg &= ~CSI2_CTRL_VP_OUT_CTRL_MASK;
reg |= currctrl->vp_out_ctrl << CSI2_CTRL_VP_OUT_CTRL_SHIFT;
if (currctrl->ecc_enable)
reg |= CSI2_CTRL_ECC_EN;
else
reg &= ~CSI2_CTRL_ECC_EN;
/*
* Set MFlag assertion boundaries to:
* Low: 4/8 of FIFO size
* High: 6/8 of FIFO size
*/
reg &= ~(CSI2_CTRL_MFLAG_LEVH_MASK | CSI2_CTRL_MFLAG_LEVL_MASK);
reg |= (2 << CSI2_CTRL_MFLAG_LEVH_SHIFT) |
(4 << CSI2_CTRL_MFLAG_LEVL_SHIFT);
/* Generation of 16x64-bit bursts (Recommended) */
reg |= CSI2_CTRL_BURST_SIZE_EXPAND;
/* Do Non-Posted writes (Recommended) */
reg |= CSI2_CTRL_NON_POSTED_WRITE;
/*
* Enforce Little endian for all formats, including:
* YUV4:2:2 8-bit and YUV4:2:0 Legacy
*/
reg |= CSI2_CTRL_ENDIANNESS;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTRL, reg);
}
static const unsigned int csi2_input_fmts[] = {
MEDIA_BUS_FMT_SGRBG10_1X10,
MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8,
MEDIA_BUS_FMT_SRGGB10_1X10,
MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8,
MEDIA_BUS_FMT_SBGGR10_1X10,
MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8,
MEDIA_BUS_FMT_SGBRG10_1X10,
MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8,
MEDIA_BUS_FMT_SBGGR8_1X8,
MEDIA_BUS_FMT_SGBRG8_1X8,
MEDIA_BUS_FMT_SGRBG8_1X8,
MEDIA_BUS_FMT_SRGGB8_1X8,
MEDIA_BUS_FMT_UYVY8_1X16,
MEDIA_BUS_FMT_YUYV8_1X16,
};
/* To set the format on the CSI2 requires a mapping function that takes
* the following inputs:
* - 3 different formats (at this time)
* - 2 destinations (mem, vp+mem) (vp only handled separately)
* - 2 decompression options (on, off)
* Output should be CSI2 frame format code
* Array indices as follows: [format][dest][decompr]
* Not all combinations are valid. 0 means invalid.
*/
static const u16 __csi2_fmt_map[][2][2] = {
/* RAW10 formats */
{
/* Output to memory */
{
/* No DPCM decompression */
CSI2_PIX_FMT_RAW10_EXP16,
/* DPCM decompression */
0,
},
/* Output to both */
{
/* No DPCM decompression */
CSI2_PIX_FMT_RAW10_EXP16_VP,
/* DPCM decompression */
0,
},
},
/* RAW10 DPCM8 formats */
{
/* Output to memory */
{
/* No DPCM decompression */
CSI2_USERDEF_8BIT_DATA1,
/* DPCM decompression */
CSI2_USERDEF_8BIT_DATA1_DPCM10,
},
/* Output to both */
{
/* No DPCM decompression */
CSI2_PIX_FMT_RAW8_VP,
/* DPCM decompression */
CSI2_USERDEF_8BIT_DATA1_DPCM10_VP,
},
},
/* RAW8 formats */
{
/* Output to memory */
{
/* No DPCM decompression */
CSI2_PIX_FMT_RAW8,
/* DPCM decompression */
0,
},
/* Output to both */
{
/* No DPCM decompression */
CSI2_PIX_FMT_RAW8_VP,
/* DPCM decompression */
0,
},
},
/* YUV422 formats */
{
/* Output to memory */
{
/* No DPCM decompression */
CSI2_PIX_FMT_YUV422_8BIT,
/* DPCM decompression */
0,
},
/* Output to both */
{
/* No DPCM decompression */
CSI2_PIX_FMT_YUV422_8BIT_VP16,
/* DPCM decompression */
0,
},
},
};
/*
* csi2_ctx_map_format - Map CSI2 sink media bus format to CSI2 format ID
* @csi2: ISS CSI2 device
*
* Returns CSI2 physical format id
*/
static u16 csi2_ctx_map_format(struct iss_csi2_device *csi2)
{
const struct v4l2_mbus_framefmt *fmt = &csi2->formats[CSI2_PAD_SINK];
int fmtidx, destidx;
switch (fmt->code) {
case MEDIA_BUS_FMT_SGRBG10_1X10:
case MEDIA_BUS_FMT_SRGGB10_1X10:
case MEDIA_BUS_FMT_SBGGR10_1X10:
case MEDIA_BUS_FMT_SGBRG10_1X10:
fmtidx = 0;
break;
case MEDIA_BUS_FMT_SGRBG10_DPCM8_1X8:
case MEDIA_BUS_FMT_SRGGB10_DPCM8_1X8:
case MEDIA_BUS_FMT_SBGGR10_DPCM8_1X8:
case MEDIA_BUS_FMT_SGBRG10_DPCM8_1X8:
fmtidx = 1;
break;
case MEDIA_BUS_FMT_SBGGR8_1X8:
case MEDIA_BUS_FMT_SGBRG8_1X8:
case MEDIA_BUS_FMT_SGRBG8_1X8:
case MEDIA_BUS_FMT_SRGGB8_1X8:
fmtidx = 2;
break;
case MEDIA_BUS_FMT_UYVY8_1X16:
case MEDIA_BUS_FMT_YUYV8_1X16:
fmtidx = 3;
break;
default:
WARN(1, "CSI2: pixel format %08x unsupported!\n",
fmt->code);
return 0;
}
if (!(csi2->output & CSI2_OUTPUT_IPIPEIF) &&
!(csi2->output & CSI2_OUTPUT_MEMORY)) {
/* Neither output enabled is a valid combination */
return CSI2_PIX_FMT_OTHERS;
}
/* If we need to skip frames at the beginning of the stream disable the
* video port to avoid sending the skipped frames to the IPIPEIF.
*/
destidx = csi2->frame_skip ? 0 : !!(csi2->output & CSI2_OUTPUT_IPIPEIF);
return __csi2_fmt_map[fmtidx][destidx][csi2->dpcm_decompress];
}
/*
* csi2_set_outaddr - Set memory address to save output image
* @csi2: Pointer to ISS CSI2a device.
* @addr: 32-bit memory address aligned on 32 byte boundary.
*
* Sets the memory address where the output will be saved.
*
* Returns 0 if successful, or -EINVAL if the address is not in the 32 byte
* boundary.
*/
static void csi2_set_outaddr(struct iss_csi2_device *csi2, u32 addr)
{
struct iss_csi2_ctx_cfg *ctx = &csi2->contexts[0];
ctx->ping_addr = addr;
ctx->pong_addr = addr;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_PING_ADDR(ctx->ctxnum),
ctx->ping_addr);
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_PONG_ADDR(ctx->ctxnum),
ctx->pong_addr);
}
/*
* is_usr_def_mapping - Checks whether USER_DEF_MAPPING should
* be enabled by CSI2.
* @format_id: mapped format id
*
*/
static inline int is_usr_def_mapping(u32 format_id)
{
return (format_id & 0xf0) == 0x40 ? 1 : 0;
}
/*
* csi2_ctx_enable - Enable specified CSI2 context
* @ctxnum: Context number, valid between 0 and 7 values.
* @enable: enable
*
*/
static void csi2_ctx_enable(struct iss_csi2_device *csi2, u8 ctxnum, u8 enable)
{
struct iss_csi2_ctx_cfg *ctx = &csi2->contexts[ctxnum];
u32 reg;
reg = iss_reg_read(csi2->iss, csi2->regs1, CSI2_CTX_CTRL1(ctxnum));
if (enable) {
unsigned int skip = 0;
if (csi2->frame_skip)
skip = csi2->frame_skip;
else if (csi2->output & CSI2_OUTPUT_MEMORY)
skip = 1;
reg &= ~CSI2_CTX_CTRL1_COUNT_MASK;
reg |= CSI2_CTX_CTRL1_COUNT_UNLOCK
| (skip << CSI2_CTX_CTRL1_COUNT_SHIFT)
| CSI2_CTX_CTRL1_CTX_EN;
} else {
reg &= ~CSI2_CTX_CTRL1_CTX_EN;
}
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_CTRL1(ctxnum), reg);
ctx->enabled = enable;
}
/*
* csi2_ctx_config - CSI2 context configuration.
* @ctx: context configuration
*
*/
static void csi2_ctx_config(struct iss_csi2_device *csi2,
struct iss_csi2_ctx_cfg *ctx)
{
u32 reg = 0;
ctx->frame = 0;
/* Set up CSI2_CTx_CTRL1 */
if (ctx->eof_enabled)
reg = CSI2_CTX_CTRL1_EOF_EN;
if (ctx->eol_enabled)
reg |= CSI2_CTX_CTRL1_EOL_EN;
if (ctx->checksum_enabled)
reg |= CSI2_CTX_CTRL1_CS_EN;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_CTRL1(ctx->ctxnum), reg);
/* Set up CSI2_CTx_CTRL2 */
reg = ctx->virtual_id << CSI2_CTX_CTRL2_VIRTUAL_ID_SHIFT;
reg |= ctx->format_id << CSI2_CTX_CTRL2_FORMAT_SHIFT;
if (ctx->dpcm_decompress && ctx->dpcm_predictor)
reg |= CSI2_CTX_CTRL2_DPCM_PRED;
if (is_usr_def_mapping(ctx->format_id))
reg |= 2 << CSI2_CTX_CTRL2_USER_DEF_MAP_SHIFT;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_CTRL2(ctx->ctxnum), reg);
/* Set up CSI2_CTx_CTRL3 */
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_CTRL3(ctx->ctxnum),
ctx->alpha << CSI2_CTX_CTRL3_ALPHA_SHIFT);
/* Set up CSI2_CTx_DAT_OFST */
iss_reg_update(csi2->iss, csi2->regs1, CSI2_CTX_DAT_OFST(ctx->ctxnum),
CSI2_CTX_DAT_OFST_MASK, ctx->data_offset);
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_PING_ADDR(ctx->ctxnum),
ctx->ping_addr);
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_PONG_ADDR(ctx->ctxnum),
ctx->pong_addr);
}
/*
* csi2_timing_config - CSI2 timing configuration.
* @timing: csi2_timing_cfg structure
*/
static void csi2_timing_config(struct iss_csi2_device *csi2,
struct iss_csi2_timing_cfg *timing)
{
u32 reg;
reg = iss_reg_read(csi2->iss, csi2->regs1, CSI2_TIMING);
if (timing->force_rx_mode)
reg |= CSI2_TIMING_FORCE_RX_MODE_IO1;
else
reg &= ~CSI2_TIMING_FORCE_RX_MODE_IO1;
if (timing->stop_state_16x)
reg |= CSI2_TIMING_STOP_STATE_X16_IO1;
else
reg &= ~CSI2_TIMING_STOP_STATE_X16_IO1;
if (timing->stop_state_4x)
reg |= CSI2_TIMING_STOP_STATE_X4_IO1;
else
reg &= ~CSI2_TIMING_STOP_STATE_X4_IO1;
reg &= ~CSI2_TIMING_STOP_STATE_COUNTER_IO1_MASK;
reg |= timing->stop_state_counter <<
CSI2_TIMING_STOP_STATE_COUNTER_IO1_SHIFT;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_TIMING, reg);
}
/*
* csi2_irq_ctx_set - Enables CSI2 Context IRQs.
* @enable: Enable/disable CSI2 Context interrupts
*/
static void csi2_irq_ctx_set(struct iss_csi2_device *csi2, int enable)
{
const u32 mask = CSI2_CTX_IRQ_FE | CSI2_CTX_IRQ_FS;
int i;
for (i = 0; i < 8; i++) {
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_IRQSTATUS(i),
mask);
if (enable)
iss_reg_set(csi2->iss, csi2->regs1,
CSI2_CTX_IRQENABLE(i), mask);
else
iss_reg_clr(csi2->iss, csi2->regs1,
CSI2_CTX_IRQENABLE(i), mask);
}
}
/*
* csi2_irq_complexio1_set - Enables CSI2 ComplexIO IRQs.
* @enable: Enable/disable CSI2 ComplexIO #1 interrupts
*/
static void csi2_irq_complexio1_set(struct iss_csi2_device *csi2, int enable)
{
u32 reg;
reg = CSI2_COMPLEXIO_IRQ_STATEALLULPMEXIT |
CSI2_COMPLEXIO_IRQ_STATEALLULPMENTER |
CSI2_COMPLEXIO_IRQ_STATEULPM5 |
CSI2_COMPLEXIO_IRQ_ERRCONTROL5 |
CSI2_COMPLEXIO_IRQ_ERRESC5 |
CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS5 |
CSI2_COMPLEXIO_IRQ_ERRSOTHS5 |
CSI2_COMPLEXIO_IRQ_STATEULPM4 |
CSI2_COMPLEXIO_IRQ_ERRCONTROL4 |
CSI2_COMPLEXIO_IRQ_ERRESC4 |
CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS4 |
CSI2_COMPLEXIO_IRQ_ERRSOTHS4 |
CSI2_COMPLEXIO_IRQ_STATEULPM3 |
CSI2_COMPLEXIO_IRQ_ERRCONTROL3 |
CSI2_COMPLEXIO_IRQ_ERRESC3 |
CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS3 |
CSI2_COMPLEXIO_IRQ_ERRSOTHS3 |
CSI2_COMPLEXIO_IRQ_STATEULPM2 |
CSI2_COMPLEXIO_IRQ_ERRCONTROL2 |
CSI2_COMPLEXIO_IRQ_ERRESC2 |
CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS2 |
CSI2_COMPLEXIO_IRQ_ERRSOTHS2 |
CSI2_COMPLEXIO_IRQ_STATEULPM1 |
CSI2_COMPLEXIO_IRQ_ERRCONTROL1 |
CSI2_COMPLEXIO_IRQ_ERRESC1 |
CSI2_COMPLEXIO_IRQ_ERRSOTSYNCHS1 |
CSI2_COMPLEXIO_IRQ_ERRSOTHS1;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_COMPLEXIO_IRQSTATUS, reg);
if (enable)
iss_reg_set(csi2->iss, csi2->regs1, CSI2_COMPLEXIO_IRQENABLE,
reg);
else
iss_reg_write(csi2->iss, csi2->regs1, CSI2_COMPLEXIO_IRQENABLE,
0);
}
/*
* csi2_irq_status_set - Enables CSI2 Status IRQs.
* @enable: Enable/disable CSI2 Status interrupts
*/
static void csi2_irq_status_set(struct iss_csi2_device *csi2, int enable)
{
u32 reg;
reg = CSI2_IRQ_OCP_ERR |
CSI2_IRQ_SHORT_PACKET |
CSI2_IRQ_ECC_CORRECTION |
CSI2_IRQ_ECC_NO_CORRECTION |
CSI2_IRQ_COMPLEXIO_ERR |
CSI2_IRQ_FIFO_OVF |
CSI2_IRQ_CONTEXT0;
iss_reg_write(csi2->iss, csi2->regs1, CSI2_IRQSTATUS, reg);
if (enable)
iss_reg_set(csi2->iss, csi2->regs1, CSI2_IRQENABLE, reg);
else
iss_reg_write(csi2->iss, csi2->regs1, CSI2_IRQENABLE, 0);
}
/*
* omap4iss_csi2_reset - Resets the CSI2 module.
*
* Must be called with the phy lock held.
*
* Returns 0 if successful, or -EBUSY if power command didn't respond.
*/
int omap4iss_csi2_reset(struct iss_csi2_device *csi2)
{
unsigned int timeout;
if (!csi2->available)
return -ENODEV;
if (csi2->phy->phy_in_use)
return -EBUSY;
iss_reg_set(csi2->iss, csi2->regs1, CSI2_SYSCONFIG,
CSI2_SYSCONFIG_SOFT_RESET);
timeout = iss_poll_condition_timeout(
iss_reg_read(csi2->iss, csi2->regs1, CSI2_SYSSTATUS) &
CSI2_SYSSTATUS_RESET_DONE, 500, 100, 200);
if (timeout) {
dev_err(csi2->iss->dev, "CSI2: Soft reset timeout!\n");
return -EBUSY;
}
iss_reg_set(csi2->iss, csi2->regs1, CSI2_COMPLEXIO_CFG,
CSI2_COMPLEXIO_CFG_RESET_CTRL);
timeout = iss_poll_condition_timeout(
iss_reg_read(csi2->iss, csi2->phy->phy_regs, REGISTER1) &
REGISTER1_RESET_DONE_CTRLCLK, 10000, 100, 500);
if (timeout) {
dev_err(csi2->iss->dev, "CSI2: CSI2_96M_FCLK reset timeout!\n");
return -EBUSY;
}
iss_reg_update(csi2->iss, csi2->regs1, CSI2_SYSCONFIG,
CSI2_SYSCONFIG_MSTANDBY_MODE_MASK |
CSI2_SYSCONFIG_AUTO_IDLE,
CSI2_SYSCONFIG_MSTANDBY_MODE_NO);
return 0;
}
static int csi2_configure(struct iss_csi2_device *csi2)
{
const struct iss_v4l2_subdevs_group *pdata;
struct iss_csi2_timing_cfg *timing = &csi2->timing[0];
struct v4l2_subdev *sensor;
struct media_pad *pad;
/*
* CSI2 fields that can be updated while the context has
* been enabled or the interface has been enabled are not
* updated dynamically currently. So we do not allow to
* reconfigure if either has been enabled
*/
if (csi2->contexts[0].enabled || csi2->ctrl.if_enable)
return -EBUSY;
pad = media_entity_remote_pad(&csi2->pads[CSI2_PAD_SINK]);
sensor = media_entity_to_v4l2_subdev(pad->entity);
pdata = sensor->host_priv;
csi2->frame_skip = 0;
v4l2_subdev_call(sensor, sensor, g_skip_frames, &csi2->frame_skip);
csi2->ctrl.vp_out_ctrl = pdata->bus.csi2.vpclk_div;
csi2->ctrl.frame_mode = ISS_CSI2_FRAME_IMMEDIATE;
csi2->ctrl.ecc_enable = pdata->bus.csi2.crc;
timing->force_rx_mode = 1;
timing->stop_state_16x = 1;
timing->stop_state_4x = 1;
timing->stop_state_counter = 0x1ff;
/*
* The CSI2 receiver can't do any format conversion except DPCM
* decompression, so every set_format call configures both pads
* and enables DPCM decompression as a special case:
*/
if (csi2->formats[CSI2_PAD_SINK].code !=
csi2->formats[CSI2_PAD_SOURCE].code)
csi2->dpcm_decompress = true;
else
csi2->dpcm_decompress = false;
csi2->contexts[0].format_id = csi2_ctx_map_format(csi2);
if (csi2->video_out.bpl_padding == 0)
csi2->contexts[0].data_offset = 0;
else
csi2->contexts[0].data_offset = csi2->video_out.bpl_value;
/*
* Enable end of frame and end of line signals generation for
* context 0. These signals are generated from CSI2 receiver to
* qualify the last pixel of a frame and the last pixel of a line.
* Without enabling the signals CSI2 receiver writes data to memory
* beyond buffer size and/or data line offset is not handled correctly.
*/
csi2->contexts[0].eof_enabled = 1;
csi2->contexts[0].eol_enabled = 1;
csi2_irq_complexio1_set(csi2, 1);
csi2_irq_ctx_set(csi2, 1);
csi2_irq_status_set(csi2, 1);
/* Set configuration (timings, format and links) */
csi2_timing_config(csi2, timing);
csi2_recv_config(csi2, &csi2->ctrl);
csi2_ctx_config(csi2, &csi2->contexts[0]);
return 0;
}
/*
* csi2_print_status - Prints CSI2 debug information.
*/
#define CSI2_PRINT_REGISTER(iss, regs, name)\
dev_dbg(iss->dev, "###CSI2 " #name "=0x%08x\n", \
iss_reg_read(iss, regs, CSI2_##name))
static void csi2_print_status(struct iss_csi2_device *csi2)
{
struct iss_device *iss = csi2->iss;
if (!csi2->available)
return;
dev_dbg(iss->dev, "-------------CSI2 Register dump-------------\n");
CSI2_PRINT_REGISTER(iss, csi2->regs1, SYSCONFIG);
CSI2_PRINT_REGISTER(iss, csi2->regs1, SYSSTATUS);
CSI2_PRINT_REGISTER(iss, csi2->regs1, IRQENABLE);
CSI2_PRINT_REGISTER(iss, csi2->regs1, IRQSTATUS);
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTRL);
CSI2_PRINT_REGISTER(iss, csi2->regs1, DBG_H);
CSI2_PRINT_REGISTER(iss, csi2->regs1, COMPLEXIO_CFG);
CSI2_PRINT_REGISTER(iss, csi2->regs1, COMPLEXIO_IRQSTATUS);
CSI2_PRINT_REGISTER(iss, csi2->regs1, SHORT_PACKET);
CSI2_PRINT_REGISTER(iss, csi2->regs1, COMPLEXIO_IRQENABLE);
CSI2_PRINT_REGISTER(iss, csi2->regs1, DBG_P);
CSI2_PRINT_REGISTER(iss, csi2->regs1, TIMING);
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_CTRL1(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_CTRL2(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_DAT_OFST(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_PING_ADDR(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_PONG_ADDR(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_IRQENABLE(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_IRQSTATUS(0));
CSI2_PRINT_REGISTER(iss, csi2->regs1, CTX_CTRL3(0));
dev_dbg(iss->dev, "--------------------------------------------\n");
}
/* -----------------------------------------------------------------------------
* Interrupt handling
*/
/*
* csi2_isr_buffer - Does buffer handling at end-of-frame
* when writing to memory.
*/
static void csi2_isr_buffer(struct iss_csi2_device *csi2)
{
struct iss_buffer *buffer;
csi2_ctx_enable(csi2, 0, 0);
buffer = omap4iss_video_buffer_next(&csi2->video_out);
/*
* Let video queue operation restart engine if there is an underrun
* condition.
*/
if (!buffer)
return;
csi2_set_outaddr(csi2, buffer->iss_addr);
csi2_ctx_enable(csi2, 0, 1);
}
static void csi2_isr_ctx(struct iss_csi2_device *csi2,
struct iss_csi2_ctx_cfg *ctx)
{
unsigned int n = ctx->ctxnum;
u32 status;
status = iss_reg_read(csi2->iss, csi2->regs1, CSI2_CTX_IRQSTATUS(n));
iss_reg_write(csi2->iss, csi2->regs1, CSI2_CTX_IRQSTATUS(n), status);
if (omap4iss_module_sync_is_stopping(&csi2->wait, &csi2->stopping))
return;
/* Propagate frame number */
if (status & CSI2_CTX_IRQ_FS) {
struct iss_pipeline *pipe =
to_iss_pipeline(&csi2->subdev.entity);
u16 frame;
u16 delta;
frame = iss_reg_read(csi2->iss, csi2->regs1,
CSI2_CTX_CTRL2(ctx->ctxnum))
>> CSI2_CTX_CTRL2_FRAME_SHIFT;
if (frame == 0) {
/* A zero value means that the counter isn't implemented
* by the source. Increment the frame number in software
* in that case.
*/
atomic_inc(&pipe->frame_number);
} else {
/* Extend the 16 bit frame number to 32 bits by
* computing the delta between two consecutive CSI2
* frame numbers and adding it to the software frame
* number. The hardware counter starts at 1 and wraps
* from 0xffff to 1 without going through 0, so subtract
* 1 when the counter wraps.
*/
delta = frame - ctx->frame;
if (frame < ctx->frame)
delta--;
ctx->frame = frame;
atomic_add(delta, &pipe->frame_number);
}
}
if (!(status & CSI2_CTX_IRQ_FE))
return;
/* Skip interrupts until we reach the frame skip count. The CSI2 will be
* automatically disabled, as the frame skip count has been programmed
* in the CSI2_CTx_CTRL1::COUNT field, so reenable it.
*
* It would have been nice to rely on the FRAME_NUMBER interrupt instead
* but it turned out that the interrupt is only generated when the CSI2
* writes to memory (the CSI2_CTx_CTRL1::COUNT field is decreased
* correctly and reaches 0 when data is forwarded to the video port only
* but no interrupt arrives). Maybe a CSI2 hardware bug.
*/
if (csi2->frame_skip) {
csi2->frame_skip--;
if (csi2->frame_skip == 0) {
ctx->format_id = csi2_ctx_map_format(csi2);
csi2_ctx_config(csi2, ctx);
csi2_ctx_enable(csi2, n, 1);
}
return;
}
if (csi2->output & CSI2_OUTPUT_MEMORY)
csi2_isr_buffer(csi2);
}
/*
* omap4iss_csi2_isr - CSI2 interrupt handling.
*/
void omap4iss_csi2_isr(struct iss_csi2_device *csi2)
{
struct iss_pipeline *pipe = to_iss_pipeline(&csi2->subdev.entity);
u32 csi2_irqstatus, cpxio1_irqstatus;
struct iss_device *iss = csi2->iss;
if (!csi2->available)
return;
csi2_irqstatus = iss_reg_read(csi2->iss, csi2->regs1, CSI2_IRQSTATUS);
iss_reg_write(csi2->iss, csi2->regs1, CSI2_IRQSTATUS, csi2_irqstatus);
/* Failure Cases */
if (csi2_irqstatus & CSI2_IRQ_COMPLEXIO_ERR) {
cpxio1_irqstatus = iss_reg_read(csi2->iss, csi2->regs1,
CSI2_COMPLEXIO_IRQSTATUS);
iss_reg_write(csi2->iss, csi2->regs1, CSI2_COMPLEXIO_IRQSTATUS,
cpxio1_irqstatus);
dev_dbg(iss->dev, "CSI2: ComplexIO Error IRQ %x\n",
cpxio1_irqstatus);
pipe->error = true;
}
if (csi2_irqstatus & (CSI2_IRQ_OCP_ERR |
CSI2_IRQ_SHORT_PACKET |
CSI2_IRQ_ECC_NO_CORRECTION |
CSI2_IRQ_COMPLEXIO_ERR |
CSI2_IRQ_FIFO_OVF)) {
dev_dbg(iss->dev,
"CSI2 Err: OCP:%d SHORT:%d ECC:%d CPXIO:%d OVF:%d\n",
csi2_irqstatus & CSI2_IRQ_OCP_ERR ? 1 : 0,
csi2_irqstatus & CSI2_IRQ_SHORT_PACKET ? 1 : 0,
csi2_irqstatus & CSI2_IRQ_ECC_NO_CORRECTION ? 1 : 0,
csi2_irqstatus & CSI2_IRQ_COMPLEXIO_ERR ? 1 : 0,
csi2_irqstatus & CSI2_IRQ_FIFO_OVF ? 1 : 0);
pipe->error = true;
}
/* Successful cases */
if (csi2_irqstatus & CSI2_IRQ_CONTEXT0)
csi2_isr_ctx(csi2, &csi2->contexts[0]);
if (csi2_irqstatus & CSI2_IRQ_ECC_CORRECTION)
dev_dbg(iss->dev, "CSI2: ECC correction done\n");
}
/* -----------------------------------------------------------------------------
* ISS video operations
*/
/*
* csi2_queue - Queues the first buffer when using memory output
* @video: The video node
* @buffer: buffer to queue
*/
static int csi2_queue(struct iss_video *video, struct iss_buffer *buffer)
{
struct iss_csi2_device *csi2 = container_of(video,
struct iss_csi2_device, video_out);
csi2_set_outaddr(csi2, buffer->iss_addr);
/*
* If streaming was enabled before there was a buffer queued
* or underrun happened in the ISR, the hardware was not enabled
* and DMA queue flag ISS_VIDEO_DMAQUEUE_UNDERRUN is still set.
* Enable it now.
*/
if (csi2->video_out.dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
/* Enable / disable context 0 and IRQs */
csi2_if_enable(csi2, 1);
csi2_ctx_enable(csi2, 0, 1);
iss_video_dmaqueue_flags_clr(&csi2->video_out);
}
return 0;
}
static const struct iss_video_operations csi2_issvideo_ops = {
.queue = csi2_queue,
};
/* -----------------------------------------------------------------------------
* V4L2 subdev operations
*/
static struct v4l2_mbus_framefmt *
__csi2_get_format(struct iss_csi2_device *csi2,
struct v4l2_subdev_pad_config *cfg,
unsigned int pad,
enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_format(&csi2->subdev, cfg, pad);
return &csi2->formats[pad];
}
static void
csi2_try_format(struct iss_csi2_device *csi2,
struct v4l2_subdev_pad_config *cfg,
unsigned int pad,
struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
u32 pixelcode;
struct v4l2_mbus_framefmt *format;
const struct iss_format_info *info;
unsigned int i;
switch (pad) {
case CSI2_PAD_SINK:
/* Clamp the width and height to valid range (1-8191). */
for (i = 0; i < ARRAY_SIZE(csi2_input_fmts); i++) {
if (fmt->code == csi2_input_fmts[i])
break;
}
/* If not found, use SGRBG10 as default */
if (i >= ARRAY_SIZE(csi2_input_fmts))
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
fmt->width = clamp_t(u32, fmt->width, 1, 8191);
fmt->height = clamp_t(u32, fmt->height, 1, 8191);
break;
case CSI2_PAD_SOURCE:
/* Source format same as sink format, except for DPCM
* compression.
*/
pixelcode = fmt->code;
format = __csi2_get_format(csi2, cfg, CSI2_PAD_SINK, which);
memcpy(fmt, format, sizeof(*fmt));
/*
* Only Allow DPCM decompression, and check that the
* pattern is preserved
*/
info = omap4iss_video_format_info(fmt->code);
if (info->uncompressed == pixelcode)
fmt->code = pixelcode;
break;
}
/* RGB, non-interlaced */
fmt->colorspace = V4L2_COLORSPACE_SRGB;
fmt->field = V4L2_FIELD_NONE;
}
/*
* csi2_enum_mbus_code - Handle pixel format enumeration
* @sd : pointer to v4l2 subdev structure
* @cfg : V4L2 subdev pad config
* @code : pointer to v4l2_subdev_mbus_code_enum structure
* return -EINVAL or zero on success
*/
static int csi2_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_mbus_code_enum *code)
{
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
const struct iss_format_info *info;
if (code->pad == CSI2_PAD_SINK) {
if (code->index >= ARRAY_SIZE(csi2_input_fmts))
return -EINVAL;
code->code = csi2_input_fmts[code->index];
} else {
format = __csi2_get_format(csi2, cfg, CSI2_PAD_SINK,
code->which);
switch (code->index) {
case 0:
/* Passthrough sink pad code */
code->code = format->code;
break;
case 1:
/* Uncompressed code */
info = omap4iss_video_format_info(format->code);
if (info->uncompressed == format->code)
return -EINVAL;
code->code = info->uncompressed;
break;
default:
return -EINVAL;
}
}
return 0;
}
static int csi2_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_frame_size_enum *fse)
{
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt format;
if (fse->index != 0)
return -EINVAL;
format.code = fse->code;
format.width = 1;
format.height = 1;
csi2_try_format(csi2, cfg, fse->pad, &format, fse->which);
fse->min_width = format.width;
fse->min_height = format.height;
if (format.code != fse->code)
return -EINVAL;
format.code = fse->code;
format.width = -1;
format.height = -1;
csi2_try_format(csi2, cfg, fse->pad, &format, fse->which);
fse->max_width = format.width;
fse->max_height = format.height;
return 0;
}
/*
* csi2_get_format - Handle get format by pads subdev method
* @sd : pointer to v4l2 subdev structure
* @cfg: V4L2 subdev pad config
* @fmt: pointer to v4l2 subdev format structure
* return -EINVAL or zero on success
*/
static int csi2_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __csi2_get_format(csi2, cfg, fmt->pad, fmt->which);
if (!format)
return -EINVAL;
fmt->format = *format;
return 0;
}
/*
* csi2_set_format - Handle set format by pads subdev method
* @sd : pointer to v4l2 subdev structure
* @cfg: V4L2 subdev pad config
* @fmt: pointer to v4l2 subdev format structure
* return -EINVAL or zero on success
*/
static int csi2_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *fmt)
{
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __csi2_get_format(csi2, cfg, fmt->pad, fmt->which);
if (!format)
return -EINVAL;
csi2_try_format(csi2, cfg, fmt->pad, &fmt->format, fmt->which);
*format = fmt->format;
/* Propagate the format from sink to source */
if (fmt->pad == CSI2_PAD_SINK) {
format = __csi2_get_format(csi2, cfg, CSI2_PAD_SOURCE,
fmt->which);
*format = fmt->format;
csi2_try_format(csi2, cfg, CSI2_PAD_SOURCE, format, fmt->which);
}
return 0;
}
static int csi2_link_validate(struct v4l2_subdev *sd, struct media_link *link,
struct v4l2_subdev_format *source_fmt,
struct v4l2_subdev_format *sink_fmt)
{
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct iss_pipeline *pipe = to_iss_pipeline(&csi2->subdev.entity);
int rval;
pipe->external = media_entity_to_v4l2_subdev(link->source->entity);
rval = omap4iss_get_external_info(pipe, link);
if (rval < 0)
return rval;
return v4l2_subdev_link_validate_default(sd, link, source_fmt,
sink_fmt);
}
/*
* csi2_init_formats - Initialize formats on all pads
* @sd: ISS CSI2 V4L2 subdevice
* @fh: V4L2 subdev file handle
*
* Initialize all pad formats with default values. If fh is not NULL, try
* formats are initialized on the file handle. Otherwise active formats are
* initialized on the device.
*/
static int csi2_init_formats(struct v4l2_subdev *sd, struct v4l2_subdev_fh *fh)
{
struct v4l2_subdev_format format;
memset(&format, 0, sizeof(format));
format.pad = CSI2_PAD_SINK;
format.which = fh ? V4L2_SUBDEV_FORMAT_TRY : V4L2_SUBDEV_FORMAT_ACTIVE;
format.format.code = MEDIA_BUS_FMT_SGRBG10_1X10;
format.format.width = 4096;
format.format.height = 4096;
csi2_set_format(sd, fh ? fh->pad : NULL, &format);
return 0;
}
/*
* csi2_set_stream - Enable/Disable streaming on the CSI2 module
* @sd: ISS CSI2 V4L2 subdevice
* @enable: ISS pipeline stream state
*
* Return 0 on success or a negative error code otherwise.
*/
static int csi2_set_stream(struct v4l2_subdev *sd, int enable)
{
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct iss_device *iss = csi2->iss;
struct iss_video *video_out = &csi2->video_out;
int ret = 0;
if (csi2->state == ISS_PIPELINE_STREAM_STOPPED) {
if (enable == ISS_PIPELINE_STREAM_STOPPED)
return 0;
omap4iss_subclk_enable(iss, csi2->subclk);
}
switch (enable) {
case ISS_PIPELINE_STREAM_CONTINUOUS: {
ret = omap4iss_csiphy_config(iss, sd);
if (ret < 0)
return ret;
if (omap4iss_csiphy_acquire(csi2->phy) < 0)
return -ENODEV;
csi2_configure(csi2);
csi2_print_status(csi2);
/*
* When outputting to memory with no buffer available, let the
* buffer queue handler start the hardware. A DMA queue flag
* ISS_VIDEO_DMAQUEUE_QUEUED will be set as soon as there is
* a buffer available.
*/
if (csi2->output & CSI2_OUTPUT_MEMORY &&
!(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
break;
/* Enable context 0 and IRQs */
atomic_set(&csi2->stopping, 0);
csi2_ctx_enable(csi2, 0, 1);
csi2_if_enable(csi2, 1);
iss_video_dmaqueue_flags_clr(video_out);
break;
}
case ISS_PIPELINE_STREAM_STOPPED:
if (csi2->state == ISS_PIPELINE_STREAM_STOPPED)
return 0;
if (omap4iss_module_sync_idle(&sd->entity, &csi2->wait,
&csi2->stopping))
ret = -ETIMEDOUT;
csi2_ctx_enable(csi2, 0, 0);
csi2_if_enable(csi2, 0);
csi2_irq_ctx_set(csi2, 0);
omap4iss_csiphy_release(csi2->phy);
omap4iss_subclk_disable(iss, csi2->subclk);
iss_video_dmaqueue_flags_clr(video_out);
break;
}
csi2->state = enable;
return ret;
}
/* subdev video operations */
static const struct v4l2_subdev_video_ops csi2_video_ops = {
.s_stream = csi2_set_stream,
};
/* subdev pad operations */
static const struct v4l2_subdev_pad_ops csi2_pad_ops = {
.enum_mbus_code = csi2_enum_mbus_code,
.enum_frame_size = csi2_enum_frame_size,
.get_fmt = csi2_get_format,
.set_fmt = csi2_set_format,
.link_validate = csi2_link_validate,
};
/* subdev operations */
static const struct v4l2_subdev_ops csi2_ops = {
.video = &csi2_video_ops,
.pad = &csi2_pad_ops,
};
/* subdev internal operations */
static const struct v4l2_subdev_internal_ops csi2_internal_ops = {
.open = csi2_init_formats,
};
/* -----------------------------------------------------------------------------
* Media entity operations
*/
/*
* csi2_link_setup - Setup CSI2 connections.
* @entity : Pointer to media entity structure
* @local : Pointer to local pad array
* @remote : Pointer to remote pad array
* @flags : Link flags
* return -EINVAL or zero on success
*/
static int csi2_link_setup(struct media_entity *entity,
const struct media_pad *local,
const struct media_pad *remote, u32 flags)
{
struct v4l2_subdev *sd = media_entity_to_v4l2_subdev(entity);
struct iss_csi2_device *csi2 = v4l2_get_subdevdata(sd);
struct iss_csi2_ctrl_cfg *ctrl = &csi2->ctrl;
unsigned int index = local->index;
/* FIXME: this is actually a hack! */
if (is_media_entity_v4l2_subdev(remote->entity))
index |= 2 << 16;
/*
* The ISS core doesn't support pipelines with multiple video outputs.
* Revisit this when it will be implemented, and return -EBUSY for now.
*/
switch (index) {
case CSI2_PAD_SOURCE:
if (flags & MEDIA_LNK_FL_ENABLED) {
if (csi2->output & ~CSI2_OUTPUT_MEMORY)
return -EBUSY;
csi2->output |= CSI2_OUTPUT_MEMORY;
} else {
csi2->output &= ~CSI2_OUTPUT_MEMORY;
}
break;
case CSI2_PAD_SOURCE | 2 << 16:
if (flags & MEDIA_LNK_FL_ENABLED) {
if (csi2->output & ~CSI2_OUTPUT_IPIPEIF)
return -EBUSY;
csi2->output |= CSI2_OUTPUT_IPIPEIF;
} else {
csi2->output &= ~CSI2_OUTPUT_IPIPEIF;
}
break;
default:
/* Link from camera to CSI2 is fixed... */
return -EINVAL;
}
ctrl->vp_only_enable = csi2->output & CSI2_OUTPUT_MEMORY ? false : true;
ctrl->vp_clk_enable = !!(csi2->output & CSI2_OUTPUT_IPIPEIF);
return 0;
}
/* media operations */
static const struct media_entity_operations csi2_media_ops = {
.link_setup = csi2_link_setup,
.link_validate = v4l2_subdev_link_validate,
};
void omap4iss_csi2_unregister_entities(struct iss_csi2_device *csi2)
{
v4l2_device_unregister_subdev(&csi2->subdev);
omap4iss_video_unregister(&csi2->video_out);
}
int omap4iss_csi2_register_entities(struct iss_csi2_device *csi2,
struct v4l2_device *vdev)
{
int ret;
/* Register the subdev and video nodes. */
ret = v4l2_device_register_subdev(vdev, &csi2->subdev);
if (ret < 0)
goto error;
ret = omap4iss_video_register(&csi2->video_out, vdev);
if (ret < 0)
goto error;
return 0;
error:
omap4iss_csi2_unregister_entities(csi2);
return ret;
}
/* -----------------------------------------------------------------------------
* ISS CSI2 initialisation and cleanup
*/
/*
* csi2_init_entities - Initialize subdev and media entity.
* @csi2: Pointer to csi2 structure.
* return -ENOMEM or zero on success
*/
static int csi2_init_entities(struct iss_csi2_device *csi2, const char *subname)
{
struct v4l2_subdev *sd = &csi2->subdev;
struct media_pad *pads = csi2->pads;
struct media_entity *me = &sd->entity;
int ret;
char name[V4L2_SUBDEV_NAME_SIZE];
v4l2_subdev_init(sd, &csi2_ops);
sd->internal_ops = &csi2_internal_ops;
snprintf(name, sizeof(name), "CSI2%s", subname);
snprintf(sd->name, sizeof(sd->name), "OMAP4 ISS %s", name);
sd->grp_id = BIT(16); /* group ID for iss subdevs */
v4l2_set_subdevdata(sd, csi2);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
pads[CSI2_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE;
pads[CSI2_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
me->ops = &csi2_media_ops;
ret = media_entity_pads_init(me, CSI2_PADS_NUM, pads);
if (ret < 0)
return ret;
csi2_init_formats(sd, NULL);
/* Video device node */
csi2->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
csi2->video_out.ops = &csi2_issvideo_ops;
csi2->video_out.bpl_alignment = 32;
csi2->video_out.bpl_zero_padding = 1;
csi2->video_out.bpl_max = 0x1ffe0;
csi2->video_out.iss = csi2->iss;
csi2->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
ret = omap4iss_video_init(&csi2->video_out, name);
if (ret < 0)
goto error_video;
return 0;
error_video:
media_entity_cleanup(&csi2->subdev.entity);
return ret;
}
/*
* omap4iss_csi2_init - Routine for module driver init
*/
int omap4iss_csi2_init(struct iss_device *iss)
{
struct iss_csi2_device *csi2a = &iss->csi2a;
struct iss_csi2_device *csi2b = &iss->csi2b;
int ret;
csi2a->iss = iss;
csi2a->available = 1;
csi2a->regs1 = OMAP4_ISS_MEM_CSI2_A_REGS1;
csi2a->phy = &iss->csiphy1;
csi2a->subclk = OMAP4_ISS_SUBCLK_CSI2_A;
csi2a->state = ISS_PIPELINE_STREAM_STOPPED;
init_waitqueue_head(&csi2a->wait);
ret = csi2_init_entities(csi2a, "a");
if (ret < 0)
return ret;
csi2b->iss = iss;
csi2b->available = 1;
csi2b->regs1 = OMAP4_ISS_MEM_CSI2_B_REGS1;
csi2b->phy = &iss->csiphy2;
csi2b->subclk = OMAP4_ISS_SUBCLK_CSI2_B;
csi2b->state = ISS_PIPELINE_STREAM_STOPPED;
init_waitqueue_head(&csi2b->wait);
ret = csi2_init_entities(csi2b, "b");
if (ret < 0)
return ret;
return 0;
}
/*
* omap4iss_csi2_create_links() - CSI2 pads links creation
* @iss: Pointer to ISS device
*
* return negative error code or zero on success
*/
int omap4iss_csi2_create_links(struct iss_device *iss)
{
struct iss_csi2_device *csi2a = &iss->csi2a;
struct iss_csi2_device *csi2b = &iss->csi2b;
int ret;
/* Connect the CSI2a subdev to the video node. */
ret = media_create_pad_link(&csi2a->subdev.entity, CSI2_PAD_SOURCE,
&csi2a->video_out.video.entity, 0, 0);
if (ret < 0)
return ret;
/* Connect the CSI2b subdev to the video node. */
ret = media_create_pad_link(&csi2b->subdev.entity, CSI2_PAD_SOURCE,
&csi2b->video_out.video.entity, 0, 0);
if (ret < 0)
return ret;
return 0;
}
/*
* omap4iss_csi2_cleanup - Routine for module driver cleanup
*/
void omap4iss_csi2_cleanup(struct iss_device *iss)
{
struct iss_csi2_device *csi2a = &iss->csi2a;
struct iss_csi2_device *csi2b = &iss->csi2b;
omap4iss_video_cleanup(&csi2a->video_out);
media_entity_cleanup(&csi2a->subdev.entity);
omap4iss_video_cleanup(&csi2b->video_out);
media_entity_cleanup(&csi2b->subdev.entity);
}