blob: 5e7f25cd53acfd648863a1570e8006c9f142e60e [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0+
/*
* TI OMAP4 ISS V4L2 Driver - ISP IPIPEIF module
*
* Copyright (C) 2012 Texas Instruments, Inc.
*
* Author: Sergio Aguirre <sergio.a.aguirre@gmail.com>
*/
#include <linux/module.h>
#include <linux/uaccess.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/dma-mapping.h>
#include <linux/mm.h>
#include <linux/sched.h>
#include "iss.h"
#include "iss_regs.h"
#include "iss_ipipeif.h"
static const unsigned int ipipeif_fmts[] = {
MEDIA_BUS_FMT_SGRBG10_1X10,
MEDIA_BUS_FMT_SRGGB10_1X10,
MEDIA_BUS_FMT_SBGGR10_1X10,
MEDIA_BUS_FMT_SGBRG10_1X10,
MEDIA_BUS_FMT_UYVY8_1X16,
MEDIA_BUS_FMT_YUYV8_1X16,
};
/*
* ipipeif_print_status - Print current IPIPEIF Module register values.
* @ipipeif: Pointer to ISS ISP IPIPEIF device.
*
* Also prints other debug information stored in the IPIPEIF module.
*/
#define IPIPEIF_PRINT_REGISTER(iss, name)\
dev_dbg(iss->dev, "###IPIPEIF " #name "=0x%08x\n", \
iss_reg_read(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_##name))
#define ISIF_PRINT_REGISTER(iss, name)\
dev_dbg(iss->dev, "###ISIF " #name "=0x%08x\n", \
iss_reg_read(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_##name))
#define ISP5_PRINT_REGISTER(iss, name)\
dev_dbg(iss->dev, "###ISP5 " #name "=0x%08x\n", \
iss_reg_read(iss, OMAP4_ISS_MEM_ISP_SYS1, ISP5_##name))
static void ipipeif_print_status(struct iss_ipipeif_device *ipipeif)
{
struct iss_device *iss = to_iss_device(ipipeif);
dev_dbg(iss->dev, "-------------IPIPEIF Register dump-------------\n");
IPIPEIF_PRINT_REGISTER(iss, CFG1);
IPIPEIF_PRINT_REGISTER(iss, CFG2);
ISIF_PRINT_REGISTER(iss, SYNCEN);
ISIF_PRINT_REGISTER(iss, CADU);
ISIF_PRINT_REGISTER(iss, CADL);
ISIF_PRINT_REGISTER(iss, MODESET);
ISIF_PRINT_REGISTER(iss, CCOLP);
ISIF_PRINT_REGISTER(iss, SPH);
ISIF_PRINT_REGISTER(iss, LNH);
ISIF_PRINT_REGISTER(iss, LNV);
ISIF_PRINT_REGISTER(iss, VDINT(0));
ISIF_PRINT_REGISTER(iss, HSIZE);
ISP5_PRINT_REGISTER(iss, SYSCONFIG);
ISP5_PRINT_REGISTER(iss, CTRL);
ISP5_PRINT_REGISTER(iss, IRQSTATUS(0));
ISP5_PRINT_REGISTER(iss, IRQENABLE_SET(0));
ISP5_PRINT_REGISTER(iss, IRQENABLE_CLR(0));
dev_dbg(iss->dev, "-----------------------------------------------\n");
}
static void ipipeif_write_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
{
struct iss_device *iss = to_iss_device(ipipeif);
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_SYNCEN,
ISIF_SYNCEN_DWEN, enable ? ISIF_SYNCEN_DWEN : 0);
}
/*
* ipipeif_enable - Enable/Disable IPIPEIF.
* @enable: enable flag
*
*/
static void ipipeif_enable(struct iss_ipipeif_device *ipipeif, u8 enable)
{
struct iss_device *iss = to_iss_device(ipipeif);
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_SYNCEN,
ISIF_SYNCEN_SYEN, enable ? ISIF_SYNCEN_SYEN : 0);
}
/* -----------------------------------------------------------------------------
* Format- and pipeline-related configuration helpers
*/
/*
* ipipeif_set_outaddr - Set memory address to save output image
* @ipipeif: Pointer to ISP IPIPEIF device.
* @addr: 32-bit memory address aligned on 32 byte boundary.
*
* Sets the memory address where the output will be saved.
*/
static void ipipeif_set_outaddr(struct iss_ipipeif_device *ipipeif, u32 addr)
{
struct iss_device *iss = to_iss_device(ipipeif);
/* Save address split in Base Address H & L */
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CADU,
(addr >> (16 + 5)) & ISIF_CADU_MASK);
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CADL,
(addr >> 5) & ISIF_CADL_MASK);
}
static void ipipeif_configure(struct iss_ipipeif_device *ipipeif)
{
struct iss_device *iss = to_iss_device(ipipeif);
const struct iss_format_info *info;
struct v4l2_mbus_framefmt *format;
u32 isif_ccolp = 0;
omap4iss_configure_bridge(iss, ipipeif->input);
/* IPIPEIF_PAD_SINK */
format = &ipipeif->formats[IPIPEIF_PAD_SINK];
/* IPIPEIF with YUV422 input from ISIF */
iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG1,
IPIPEIF_CFG1_INPSRC1_MASK | IPIPEIF_CFG1_INPSRC2_MASK);
/* Select ISIF/IPIPEIF input format */
switch (format->code) {
case MEDIA_BUS_FMT_UYVY8_1X16:
case MEDIA_BUS_FMT_YUYV8_1X16:
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
ISIF_MODESET_CCDW_MASK,
ISIF_MODESET_INPMOD_YCBCR16);
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG2,
IPIPEIF_CFG2_YUV8, IPIPEIF_CFG2_YUV16);
break;
case MEDIA_BUS_FMT_SGRBG10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_GR |
ISIF_CCOLP_CP1_F0_R |
ISIF_CCOLP_CP2_F0_B |
ISIF_CCOLP_CP3_F0_GB;
goto cont_raw;
case MEDIA_BUS_FMT_SRGGB10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_R |
ISIF_CCOLP_CP1_F0_GR |
ISIF_CCOLP_CP2_F0_GB |
ISIF_CCOLP_CP3_F0_B;
goto cont_raw;
case MEDIA_BUS_FMT_SBGGR10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_B |
ISIF_CCOLP_CP1_F0_GB |
ISIF_CCOLP_CP2_F0_GR |
ISIF_CCOLP_CP3_F0_R;
goto cont_raw;
case MEDIA_BUS_FMT_SGBRG10_1X10:
isif_ccolp = ISIF_CCOLP_CP0_F0_GB |
ISIF_CCOLP_CP1_F0_B |
ISIF_CCOLP_CP2_F0_R |
ISIF_CCOLP_CP3_F0_GR;
cont_raw:
iss_reg_clr(iss, OMAP4_ISS_MEM_ISP_IPIPEIF, IPIPEIF_CFG2,
IPIPEIF_CFG2_YUV16);
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_MODESET,
ISIF_MODESET_CCDMD | ISIF_MODESET_INPMOD_MASK |
ISIF_MODESET_CCDW_MASK, ISIF_MODESET_INPMOD_RAW |
ISIF_MODESET_CCDW_2BIT);
info = omap4iss_video_format_info(format->code);
iss_reg_update(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CGAMMAWD,
ISIF_CGAMMAWD_GWDI_MASK,
ISIF_CGAMMAWD_GWDI(info->bpp));
/* Set RAW Bayer pattern */
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_CCOLP,
isif_ccolp);
break;
}
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_SPH, 0 & ISIF_SPH_MASK);
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_LNH,
(format->width - 1) & ISIF_LNH_MASK);
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_LNV,
(format->height - 1) & ISIF_LNV_MASK);
/* Generate ISIF0 on the last line of the image */
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_VDINT(0),
format->height - 1);
/* IPIPEIF_PAD_SOURCE_ISIF_SF */
format = &ipipeif->formats[IPIPEIF_PAD_SOURCE_ISIF_SF];
iss_reg_write(iss, OMAP4_ISS_MEM_ISP_ISIF, ISIF_HSIZE,
(ipipeif->video_out.bpl_value >> 5) &
ISIF_HSIZE_HSIZE_MASK);
/* IPIPEIF_PAD_SOURCE_VP */
/* Do nothing? */
}
/* -----------------------------------------------------------------------------
* Interrupt handling
*/
static void ipipeif_isr_buffer(struct iss_ipipeif_device *ipipeif)
{
struct iss_buffer *buffer;
/* The ISIF generates VD0 interrupts even when writes are disabled.
* deal with it anyway). Disabling the ISIF when no buffer is available
* is thus not be enough, we need to handle the situation explicitly.
*/
if (list_empty(&ipipeif->video_out.dmaqueue))
return;
ipipeif_write_enable(ipipeif, 0);
buffer = omap4iss_video_buffer_next(&ipipeif->video_out);
if (!buffer)
return;
ipipeif_set_outaddr(ipipeif, buffer->iss_addr);
ipipeif_write_enable(ipipeif, 1);
}
/*
* omap4iss_ipipeif_isr - Configure ipipeif during interframe time.
* @ipipeif: Pointer to ISP IPIPEIF device.
* @events: IPIPEIF events
*/
void omap4iss_ipipeif_isr(struct iss_ipipeif_device *ipipeif, u32 events)
{
if (omap4iss_module_sync_is_stopping(&ipipeif->wait,
&ipipeif->stopping))
return;
if ((events & ISP5_IRQ_ISIF_INT(0)) &&
(ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
ipipeif_isr_buffer(ipipeif);
}
/* -----------------------------------------------------------------------------
* ISP video operations
*/
static int ipipeif_video_queue(struct iss_video *video,
struct iss_buffer *buffer)
{
struct iss_ipipeif_device *ipipeif = container_of(video,
struct iss_ipipeif_device, video_out);
if (!(ipipeif->output & IPIPEIF_OUTPUT_MEMORY))
return -ENODEV;
ipipeif_set_outaddr(ipipeif, 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 (video->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_UNDERRUN) {
if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
ipipeif_write_enable(ipipeif, 1);
ipipeif_enable(ipipeif, 1);
iss_video_dmaqueue_flags_clr(video);
}
return 0;
}
static const struct iss_video_operations ipipeif_video_ops = {
.queue = ipipeif_video_queue,
};
/* -----------------------------------------------------------------------------
* V4L2 subdev operations
*/
#define IPIPEIF_DRV_SUBCLK_MASK (OMAP4_ISS_ISP_SUBCLK_IPIPEIF |\
OMAP4_ISS_ISP_SUBCLK_ISIF)
/*
* ipipeif_set_stream - Enable/Disable streaming on the IPIPEIF module
* @sd: ISP IPIPEIF V4L2 subdevice
* @enable: Enable/disable stream
*/
static int ipipeif_set_stream(struct v4l2_subdev *sd, int enable)
{
struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
struct iss_device *iss = to_iss_device(ipipeif);
struct iss_video *video_out = &ipipeif->video_out;
int ret = 0;
if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED) {
if (enable == ISS_PIPELINE_STREAM_STOPPED)
return 0;
omap4iss_isp_subclk_enable(iss, IPIPEIF_DRV_SUBCLK_MASK);
}
switch (enable) {
case ISS_PIPELINE_STREAM_CONTINUOUS:
ipipeif_configure(ipipeif);
ipipeif_print_status(ipipeif);
/*
* 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 (ipipeif->output & IPIPEIF_OUTPUT_MEMORY &&
!(video_out->dmaqueue_flags & ISS_VIDEO_DMAQUEUE_QUEUED))
break;
atomic_set(&ipipeif->stopping, 0);
if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
ipipeif_write_enable(ipipeif, 1);
ipipeif_enable(ipipeif, 1);
iss_video_dmaqueue_flags_clr(video_out);
break;
case ISS_PIPELINE_STREAM_STOPPED:
if (ipipeif->state == ISS_PIPELINE_STREAM_STOPPED)
return 0;
if (omap4iss_module_sync_idle(&sd->entity, &ipipeif->wait,
&ipipeif->stopping))
ret = -ETIMEDOUT;
if (ipipeif->output & IPIPEIF_OUTPUT_MEMORY)
ipipeif_write_enable(ipipeif, 0);
ipipeif_enable(ipipeif, 0);
omap4iss_isp_subclk_disable(iss, IPIPEIF_DRV_SUBCLK_MASK);
iss_video_dmaqueue_flags_clr(video_out);
break;
}
ipipeif->state = enable;
return ret;
}
static struct v4l2_mbus_framefmt *
__ipipeif_get_format(struct iss_ipipeif_device *ipipeif,
struct v4l2_subdev_state *sd_state, unsigned int pad,
enum v4l2_subdev_format_whence which)
{
if (which == V4L2_SUBDEV_FORMAT_TRY)
return v4l2_subdev_get_try_format(&ipipeif->subdev, sd_state,
pad);
return &ipipeif->formats[pad];
}
/*
* ipipeif_try_format - Try video format on a pad
* @ipipeif: ISS IPIPEIF device
* @cfg: V4L2 subdev pad config
* @pad: Pad number
* @fmt: Format
*/
static void
ipipeif_try_format(struct iss_ipipeif_device *ipipeif,
struct v4l2_subdev_state *sd_state, unsigned int pad,
struct v4l2_mbus_framefmt *fmt,
enum v4l2_subdev_format_whence which)
{
struct v4l2_mbus_framefmt *format;
unsigned int width = fmt->width;
unsigned int height = fmt->height;
unsigned int i;
switch (pad) {
case IPIPEIF_PAD_SINK:
/* TODO: If the IPIPEIF output formatter pad is connected
* directly to the resizer, only YUV formats can be used.
*/
for (i = 0; i < ARRAY_SIZE(ipipeif_fmts); i++) {
if (fmt->code == ipipeif_fmts[i])
break;
}
/* If not found, use SGRBG10 as default */
if (i >= ARRAY_SIZE(ipipeif_fmts))
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
/* Clamp the input size. */
fmt->width = clamp_t(u32, width, 1, 8192);
fmt->height = clamp_t(u32, height, 1, 8192);
break;
case IPIPEIF_PAD_SOURCE_ISIF_SF:
format = __ipipeif_get_format(ipipeif, sd_state,
IPIPEIF_PAD_SINK,
which);
memcpy(fmt, format, sizeof(*fmt));
/* The data formatter truncates the number of horizontal output
* pixels to a multiple of 16. To avoid clipping data, allow
* callers to request an output size bigger than the input size
* up to the nearest multiple of 16.
*/
fmt->width = clamp_t(u32, width, 32, (fmt->width + 15) & ~15);
fmt->width &= ~15;
fmt->height = clamp_t(u32, height, 32, fmt->height);
break;
case IPIPEIF_PAD_SOURCE_VP:
format = __ipipeif_get_format(ipipeif, sd_state,
IPIPEIF_PAD_SINK,
which);
memcpy(fmt, format, sizeof(*fmt));
fmt->width = clamp_t(u32, width, 32, fmt->width);
fmt->height = clamp_t(u32, height, 32, fmt->height);
break;
}
/* Data is written to memory unpacked, each 10-bit or 12-bit pixel is
* stored on 2 bytes.
*/
fmt->colorspace = V4L2_COLORSPACE_SRGB;
fmt->field = V4L2_FIELD_NONE;
}
/*
* ipipeif_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 ipipeif_enum_mbus_code(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_mbus_code_enum *code)
{
struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
switch (code->pad) {
case IPIPEIF_PAD_SINK:
if (code->index >= ARRAY_SIZE(ipipeif_fmts))
return -EINVAL;
code->code = ipipeif_fmts[code->index];
break;
case IPIPEIF_PAD_SOURCE_ISIF_SF:
case IPIPEIF_PAD_SOURCE_VP:
/* No format conversion inside IPIPEIF */
if (code->index != 0)
return -EINVAL;
format = __ipipeif_get_format(ipipeif, sd_state,
IPIPEIF_PAD_SINK,
code->which);
code->code = format->code;
break;
default:
return -EINVAL;
}
return 0;
}
static int ipipeif_enum_frame_size(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_frame_size_enum *fse)
{
struct iss_ipipeif_device *ipipeif = 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;
ipipeif_try_format(ipipeif, sd_state, 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;
ipipeif_try_format(ipipeif, sd_state, fse->pad, &format, fse->which);
fse->max_width = format.width;
fse->max_height = format.height;
return 0;
}
/*
* ipipeif_get_format - Retrieve the video format on a pad
* @sd : ISP IPIPEIF V4L2 subdevice
* @cfg: V4L2 subdev pad config
* @fmt: Format
*
* Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
* to the format type.
*/
static int ipipeif_get_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __ipipeif_get_format(ipipeif, sd_state, fmt->pad, fmt->which);
if (!format)
return -EINVAL;
fmt->format = *format;
return 0;
}
/*
* ipipeif_set_format - Set the video format on a pad
* @sd : ISP IPIPEIF V4L2 subdevice
* @cfg: V4L2 subdev pad config
* @fmt: Format
*
* Return 0 on success or -EINVAL if the pad is invalid or doesn't correspond
* to the format type.
*/
static int ipipeif_set_format(struct v4l2_subdev *sd,
struct v4l2_subdev_state *sd_state,
struct v4l2_subdev_format *fmt)
{
struct iss_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
struct v4l2_mbus_framefmt *format;
format = __ipipeif_get_format(ipipeif, sd_state, fmt->pad, fmt->which);
if (!format)
return -EINVAL;
ipipeif_try_format(ipipeif, sd_state, fmt->pad, &fmt->format,
fmt->which);
*format = fmt->format;
/* Propagate the format from sink to source */
if (fmt->pad == IPIPEIF_PAD_SINK) {
format = __ipipeif_get_format(ipipeif, sd_state,
IPIPEIF_PAD_SOURCE_ISIF_SF,
fmt->which);
*format = fmt->format;
ipipeif_try_format(ipipeif, sd_state,
IPIPEIF_PAD_SOURCE_ISIF_SF,
format, fmt->which);
format = __ipipeif_get_format(ipipeif, sd_state,
IPIPEIF_PAD_SOURCE_VP,
fmt->which);
*format = fmt->format;
ipipeif_try_format(ipipeif, sd_state, IPIPEIF_PAD_SOURCE_VP,
format,
fmt->which);
}
return 0;
}
static int ipipeif_link_validate(struct v4l2_subdev *sd,
struct media_link *link,
struct v4l2_subdev_format *source_fmt,
struct v4l2_subdev_format *sink_fmt)
{
/* Check if the two ends match */
if (source_fmt->format.width != sink_fmt->format.width ||
source_fmt->format.height != sink_fmt->format.height)
return -EPIPE;
if (source_fmt->format.code != sink_fmt->format.code)
return -EPIPE;
return 0;
}
/*
* ipipeif_init_formats - Initialize formats on all pads
* @sd: ISP IPIPEIF 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 ipipeif_init_formats(struct v4l2_subdev *sd,
struct v4l2_subdev_fh *fh)
{
struct v4l2_subdev_format format;
memset(&format, 0, sizeof(format));
format.pad = IPIPEIF_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;
ipipeif_set_format(sd, fh ? fh->state : NULL, &format);
return 0;
}
/* V4L2 subdev video operations */
static const struct v4l2_subdev_video_ops ipipeif_v4l2_video_ops = {
.s_stream = ipipeif_set_stream,
};
/* V4L2 subdev pad operations */
static const struct v4l2_subdev_pad_ops ipipeif_v4l2_pad_ops = {
.enum_mbus_code = ipipeif_enum_mbus_code,
.enum_frame_size = ipipeif_enum_frame_size,
.get_fmt = ipipeif_get_format,
.set_fmt = ipipeif_set_format,
.link_validate = ipipeif_link_validate,
};
/* V4L2 subdev operations */
static const struct v4l2_subdev_ops ipipeif_v4l2_ops = {
.video = &ipipeif_v4l2_video_ops,
.pad = &ipipeif_v4l2_pad_ops,
};
/* V4L2 subdev internal operations */
static const struct v4l2_subdev_internal_ops ipipeif_v4l2_internal_ops = {
.open = ipipeif_init_formats,
};
/* -----------------------------------------------------------------------------
* Media entity operations
*/
/*
* ipipeif_link_setup - Setup IPIPEIF connections
* @entity: IPIPEIF media entity
* @local: Pad at the local end of the link
* @remote: Pad at the remote end of the link
* @flags: Link flags
*
* return -EINVAL or zero on success
*/
static int ipipeif_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_ipipeif_device *ipipeif = v4l2_get_subdevdata(sd);
struct iss_device *iss = to_iss_device(ipipeif);
unsigned int index = local->index;
/* FIXME: this is actually a hack! */
if (is_media_entity_v4l2_subdev(remote->entity))
index |= 2 << 16;
switch (index) {
case IPIPEIF_PAD_SINK | 2 << 16:
/* Read from the sensor CSI2a or CSI2b. */
if (!(flags & MEDIA_LNK_FL_ENABLED)) {
ipipeif->input = IPIPEIF_INPUT_NONE;
break;
}
if (ipipeif->input != IPIPEIF_INPUT_NONE)
return -EBUSY;
if (remote->entity == &iss->csi2a.subdev.entity)
ipipeif->input = IPIPEIF_INPUT_CSI2A;
else if (remote->entity == &iss->csi2b.subdev.entity)
ipipeif->input = IPIPEIF_INPUT_CSI2B;
break;
case IPIPEIF_PAD_SOURCE_ISIF_SF:
/* Write to memory */
if (flags & MEDIA_LNK_FL_ENABLED) {
if (ipipeif->output & ~IPIPEIF_OUTPUT_MEMORY)
return -EBUSY;
ipipeif->output |= IPIPEIF_OUTPUT_MEMORY;
} else {
ipipeif->output &= ~IPIPEIF_OUTPUT_MEMORY;
}
break;
case IPIPEIF_PAD_SOURCE_VP | 2 << 16:
/* Send to IPIPE/RESIZER */
if (flags & MEDIA_LNK_FL_ENABLED) {
if (ipipeif->output & ~IPIPEIF_OUTPUT_VP)
return -EBUSY;
ipipeif->output |= IPIPEIF_OUTPUT_VP;
} else {
ipipeif->output &= ~IPIPEIF_OUTPUT_VP;
}
break;
default:
return -EINVAL;
}
return 0;
}
/* media operations */
static const struct media_entity_operations ipipeif_media_ops = {
.link_setup = ipipeif_link_setup,
.link_validate = v4l2_subdev_link_validate,
};
/*
* ipipeif_init_entities - Initialize V4L2 subdev and media entity
* @ipipeif: ISS ISP IPIPEIF module
*
* Return 0 on success and a negative error code on failure.
*/
static int ipipeif_init_entities(struct iss_ipipeif_device *ipipeif)
{
struct v4l2_subdev *sd = &ipipeif->subdev;
struct media_pad *pads = ipipeif->pads;
struct media_entity *me = &sd->entity;
int ret;
ipipeif->input = IPIPEIF_INPUT_NONE;
v4l2_subdev_init(sd, &ipipeif_v4l2_ops);
sd->internal_ops = &ipipeif_v4l2_internal_ops;
strscpy(sd->name, "OMAP4 ISS ISP IPIPEIF", sizeof(sd->name));
sd->grp_id = BIT(16); /* group ID for iss subdevs */
v4l2_set_subdevdata(sd, ipipeif);
sd->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
pads[IPIPEIF_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
pads[IPIPEIF_PAD_SOURCE_ISIF_SF].flags = MEDIA_PAD_FL_SOURCE;
pads[IPIPEIF_PAD_SOURCE_VP].flags = MEDIA_PAD_FL_SOURCE;
me->ops = &ipipeif_media_ops;
ret = media_entity_pads_init(me, IPIPEIF_PADS_NUM, pads);
if (ret < 0)
return ret;
ipipeif_init_formats(sd, NULL);
ipipeif->video_out.type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
ipipeif->video_out.ops = &ipipeif_video_ops;
ipipeif->video_out.iss = to_iss_device(ipipeif);
ipipeif->video_out.capture_mem = PAGE_ALIGN(4096 * 4096) * 3;
ipipeif->video_out.bpl_alignment = 32;
ipipeif->video_out.bpl_zero_padding = 1;
ipipeif->video_out.bpl_max = 0x1ffe0;
return omap4iss_video_init(&ipipeif->video_out, "ISP IPIPEIF");
}
void omap4iss_ipipeif_unregister_entities(struct iss_ipipeif_device *ipipeif)
{
v4l2_device_unregister_subdev(&ipipeif->subdev);
omap4iss_video_unregister(&ipipeif->video_out);
}
int omap4iss_ipipeif_register_entities(struct iss_ipipeif_device *ipipeif,
struct v4l2_device *vdev)
{
int ret;
/* Register the subdev and video node. */
ret = v4l2_device_register_subdev(vdev, &ipipeif->subdev);
if (ret < 0)
goto error;
ret = omap4iss_video_register(&ipipeif->video_out, vdev);
if (ret < 0)
goto error;
return 0;
error:
omap4iss_ipipeif_unregister_entities(ipipeif);
return ret;
}
/* -----------------------------------------------------------------------------
* ISP IPIPEIF initialisation and cleanup
*/
/*
* omap4iss_ipipeif_init - IPIPEIF module initialization.
* @iss: Device pointer specific to the OMAP4 ISS.
*
* TODO: Get the initialisation values from platform data.
*
* Return 0 on success or a negative error code otherwise.
*/
int omap4iss_ipipeif_init(struct iss_device *iss)
{
struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
ipipeif->state = ISS_PIPELINE_STREAM_STOPPED;
init_waitqueue_head(&ipipeif->wait);
return ipipeif_init_entities(ipipeif);
}
/*
* omap4iss_ipipeif_create_links() - IPIPEIF pads links creation
* @iss: Pointer to ISS device
*
* return negative error code or zero on success
*/
int omap4iss_ipipeif_create_links(struct iss_device *iss)
{
struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
/* Connect the IPIPEIF subdev to the video node. */
return media_create_pad_link(&ipipeif->subdev.entity,
IPIPEIF_PAD_SOURCE_ISIF_SF,
&ipipeif->video_out.video.entity, 0, 0);
}
/*
* omap4iss_ipipeif_cleanup - IPIPEIF module cleanup.
* @iss: Device pointer specific to the OMAP4 ISS.
*/
void omap4iss_ipipeif_cleanup(struct iss_device *iss)
{
struct iss_ipipeif_device *ipipeif = &iss->ipipeif;
media_entity_cleanup(&ipipeif->subdev.entity);
}