// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright 2021-2022 Bootlin
* Author: Paul Kocialkowski <[email protected]>
*/
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <media/v4l2-device.h>
#include <media/v4l2-fwnode.h>
#include "sun6i_csi.h"
#include "sun6i_csi_bridge.h"
#include "sun6i_csi_reg.h"
/* Helpers */
void sun6i_csi_bridge_dimensions(struct sun6i_csi_device *csi_dev,
unsigned int *width, unsigned int *height)
{
if (width)
*width = csi_dev->bridge.mbus_format.width;
if (height)
*height = csi_dev->bridge.mbus_format.height;
}
void sun6i_csi_bridge_format(struct sun6i_csi_device *csi_dev,
u32 *mbus_code, u32 *field)
{
if (mbus_code)
*mbus_code = csi_dev->bridge.mbus_format.code;
if (field)
*field = csi_dev->bridge.mbus_format.field;
}
/* Format */
static const struct sun6i_csi_bridge_format sun6i_csi_bridge_formats[] = {
/* Bayer */
{
.mbus_code = MEDIA_BUS_FMT_SBGGR8_1X8,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SGBRG8_1X8,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SGRBG8_1X8,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SRGGB8_1X8,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SBGGR10_1X10,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SGBRG10_1X10,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SGRBG10_1X10,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SRGGB10_1X10,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SBGGR12_1X12,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SGBRG12_1X12,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SGRBG12_1X12,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_SRGGB12_1X12,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
/* RGB */
{
.mbus_code = MEDIA_BUS_FMT_RGB565_2X8_LE,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
{
.mbus_code = MEDIA_BUS_FMT_RGB565_2X8_BE,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
/* YUV422 */
{
.mbus_code = MEDIA_BUS_FMT_YUYV8_2X8,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
},
{
.mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
},
{
.mbus_code = MEDIA_BUS_FMT_YVYU8_2X8,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
},
{
.mbus_code = MEDIA_BUS_FMT_UYVY8_2X8,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
},
{
.mbus_code = MEDIA_BUS_FMT_VYUY8_2X8,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
},
{
.mbus_code = MEDIA_BUS_FMT_YUYV8_1X16,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
},
{
.mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
},
{
.mbus_code = MEDIA_BUS_FMT_YVYU8_1X16,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_YVYU,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_YUYV,
},
{
.mbus_code = MEDIA_BUS_FMT_UYVY8_1X16,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
},
{
.mbus_code = MEDIA_BUS_FMT_VYUY8_1X16,
.input_format = SUN6I_CSI_INPUT_FMT_YUV422,
.input_yuv_seq = SUN6I_CSI_INPUT_YUV_SEQ_VYUY,
.input_yuv_seq_invert = SUN6I_CSI_INPUT_YUV_SEQ_UYVY,
},
/* Compressed */
{
.mbus_code = MEDIA_BUS_FMT_JPEG_1X8,
.input_format = SUN6I_CSI_INPUT_FMT_RAW,
},
};
const struct sun6i_csi_bridge_format *
sun6i_csi_bridge_format_find(u32 mbus_code)
{
unsigned int i;
for (i = 0; i < ARRAY_SIZE(sun6i_csi_bridge_formats); i++)
if (sun6i_csi_bridge_formats[i].mbus_code == mbus_code)
return &sun6i_csi_bridge_formats[i];
return NULL;
}
/* Bridge */
static void sun6i_csi_bridge_irq_enable(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG,
SUN6I_CSI_CH_INT_EN_VS |
SUN6I_CSI_CH_INT_EN_HB_OF |
SUN6I_CSI_CH_INT_EN_FIFO2_OF |
SUN6I_CSI_CH_INT_EN_FIFO1_OF |
SUN6I_CSI_CH_INT_EN_FIFO0_OF |
SUN6I_CSI_CH_INT_EN_FD |
SUN6I_CSI_CH_INT_EN_CD);
}
static void sun6i_csi_bridge_irq_disable(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG, 0);
}
static void sun6i_csi_bridge_irq_clear(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
regmap_write(regmap, SUN6I_CSI_CH_INT_EN_REG, 0);
regmap_write(regmap, SUN6I_CSI_CH_INT_STA_REG,
SUN6I_CSI_CH_INT_STA_CLEAR);
}
static void sun6i_csi_bridge_enable(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
regmap_update_bits(regmap, SUN6I_CSI_EN_REG, SUN6I_CSI_EN_CSI_EN,
SUN6I_CSI_EN_CSI_EN);
regmap_update_bits(regmap, SUN6I_CSI_CAP_REG, SUN6I_CSI_CAP_VCAP_ON,
SUN6I_CSI_CAP_VCAP_ON);
}
static void sun6i_csi_bridge_disable(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
regmap_update_bits(regmap, SUN6I_CSI_CAP_REG, SUN6I_CSI_CAP_VCAP_ON, 0);
regmap_update_bits(regmap, SUN6I_CSI_EN_REG, SUN6I_CSI_EN_CSI_EN, 0);
}
static void
sun6i_csi_bridge_configure_parallel(struct sun6i_csi_device *csi_dev)
{
struct device *dev = csi_dev->dev;
struct regmap *regmap = csi_dev->regmap;
struct v4l2_fwnode_endpoint *endpoint =
&csi_dev->bridge.source_parallel.endpoint;
unsigned char bus_width = endpoint->bus.parallel.bus_width;
unsigned int flags = endpoint->bus.parallel.flags;
u32 field;
u32 value = SUN6I_CSI_IF_CFG_IF_CSI;
sun6i_csi_bridge_format(csi_dev, NULL, &field);
if (field == V4L2_FIELD_INTERLACED ||
field == V4L2_FIELD_INTERLACED_TB ||
field == V4L2_FIELD_INTERLACED_BT)
value |= SUN6I_CSI_IF_CFG_SRC_TYPE_INTERLACED |
SUN6I_CSI_IF_CFG_FIELD_DT_PCLK_SHIFT(1) |
SUN6I_CSI_IF_CFG_FIELD_DT_FIELD_VSYNC;
else
value |= SUN6I_CSI_IF_CFG_SRC_TYPE_PROGRESSIVE;
switch (endpoint->bus_type) {
case V4L2_MBUS_PARALLEL:
if (bus_width == 16)
value |= SUN6I_CSI_IF_CFG_IF_CSI_YUV_COMBINED;
else
value |= SUN6I_CSI_IF_CFG_IF_CSI_YUV_RAW;
if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
value |= SUN6I_CSI_IF_CFG_FIELD_NEGATIVE;
else
value |= SUN6I_CSI_IF_CFG_FIELD_POSITIVE;
if (flags & V4L2_MBUS_VSYNC_ACTIVE_LOW)
value |= SUN6I_CSI_IF_CFG_VREF_POL_NEGATIVE;
else
value |= SUN6I_CSI_IF_CFG_VREF_POL_POSITIVE;
if (flags & V4L2_MBUS_HSYNC_ACTIVE_LOW)
value |= SUN6I_CSI_IF_CFG_HREF_POL_NEGATIVE;
else
value |= SUN6I_CSI_IF_CFG_HREF_POL_POSITIVE;
if (flags & V4L2_MBUS_PCLK_SAMPLE_RISING)
value |= SUN6I_CSI_IF_CFG_CLK_POL_RISING;
else
value |= SUN6I_CSI_IF_CFG_CLK_POL_FALLING;
break;
case V4L2_MBUS_BT656:
if (bus_width == 16)
value |= SUN6I_CSI_IF_CFG_IF_CSI_BT1120;
else
value |= SUN6I_CSI_IF_CFG_IF_CSI_BT656;
if (flags & V4L2_MBUS_FIELD_EVEN_LOW)
value |= SUN6I_CSI_IF_CFG_FIELD_NEGATIVE;
else
value |= SUN6I_CSI_IF_CFG_FIELD_POSITIVE;
if (flags & V4L2_MBUS_PCLK_SAMPLE_FALLING)
value |= SUN6I_CSI_IF_CFG_CLK_POL_RISING;
else
value |= SUN6I_CSI_IF_CFG_CLK_POL_FALLING;
break;
default:
dev_warn(dev, "unsupported bus type: %d\n", endpoint->bus_type);
break;
}
switch (bus_width) {
case 8:
/* 16-bit YUV formats use a doubled width in 8-bit mode. */
case 16:
value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_8;
break;
case 10:
value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_10;
break;
case 12:
value |= SUN6I_CSI_IF_CFG_DATA_WIDTH_12;
break;
default:
dev_warn(dev, "unsupported bus width: %u\n", bus_width);
break;
}
regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value);
}
static void
sun6i_csi_bridge_configure_mipi_csi2(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
u32 value = SUN6I_CSI_IF_CFG_IF_MIPI;
u32 field;
sun6i_csi_bridge_format(csi_dev, NULL, &field);
if (field == V4L2_FIELD_INTERLACED ||
field == V4L2_FIELD_INTERLACED_TB ||
field == V4L2_FIELD_INTERLACED_BT)
value |= SUN6I_CSI_IF_CFG_SRC_TYPE_INTERLACED;
else
value |= SUN6I_CSI_IF_CFG_SRC_TYPE_PROGRESSIVE;
regmap_write(regmap, SUN6I_CSI_IF_CFG_REG, value);
}
static void sun6i_csi_bridge_configure_format(struct sun6i_csi_device *csi_dev)
{
struct regmap *regmap = csi_dev->regmap;
bool capture_streaming = csi_dev->capture.state.streaming;
const struct sun6i_csi_bridge_format *bridge_format;
const struct sun6i_csi_capture_format *capture_format;
u32 mbus_code, field, pixelformat;
u8 input_format, input_yuv_seq, output_format;
u32 value = 0;
sun6i_csi_bridge_format(csi_dev, &mbus_code, &field);
bridge_format = sun6i_csi_bridge_format_find(mbus_code);
if (WARN_ON(!bridge_format))
return;
input_format = bridge_format->input_format;
input_yuv_seq = bridge_format->input_yuv_seq;
if (capture_streaming) {
sun6i_csi_capture_format(csi_dev, &pixelformat, NULL);
capture_format = sun6i_csi_capture_format_find(pixelformat);
if (WARN_ON(!capture_format))
return;
if (capture_format->input_format_raw)
input_format = SUN6I_CSI_INPUT_FMT_RAW;
if (capture_format->input_yuv_seq_invert)
input_yuv_seq = bridge_format->input_yuv_seq_invert;
if (field == V4L2_FIELD_INTERLACED ||
field == V4L2_FIELD_INTERLACED_TB ||
field == V4L2_FIELD_INTERLACED_BT)
output_format = capture_format->output_format_field;
else
output_format = capture_format->output_format_frame;
value |= SUN6I_CSI_CH_CFG_OUTPUT_FMT(output_format);
}
value |= SUN6I_CSI_CH_CFG_INPUT_FMT(input_format);
value |= SUN6I_CSI_CH_CFG_INPUT_YUV_SEQ(input_yuv_seq);
if (field == V4L2_FIELD_TOP)
value |= SUN6I_CSI_CH_CFG_FIELD_SEL_FIELD0;
else if (field == V4L2_FIELD_BOTTOM)
value |= SUN6I_CSI_CH_CFG_FIELD_SEL_FIELD1;
else
value |= SUN6I_CSI_CH_CFG_FIELD_SEL_EITHER;
regmap_write(regmap, SUN6I_CSI_CH_CFG_REG, value);
}
static void sun6i_csi_bridge_configure(struct sun6i_csi_device *csi_dev,
struct sun6i_csi_bridge_source *source)
{
struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
if (source == &bridge->source_parallel)
sun6i_csi_bridge_configure_parallel(csi_dev);
else
sun6i_csi_bridge_configure_mipi_csi2(csi_dev);
sun6i_csi_bridge_configure_format(csi_dev);
}
/* V4L2 Subdev */
static int sun6i_csi_bridge_s_stream(struct v4l2_subdev *subdev, int on)
{
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
struct media_pad *local_pad = &bridge->pads[SUN6I_CSI_BRIDGE_PAD_SINK];
bool capture_streaming = csi_dev->capture.state.streaming;
struct device *dev = csi_dev->dev;
struct sun6i_csi_bridge_source *source;
struct v4l2_subdev *source_subdev;
struct media_pad *remote_pad;
int ret;
/* Source */
remote_pad = media_pad_remote_pad_unique(local_pad);
if (IS_ERR(remote_pad)) {
dev_err(dev,
"zero or more than a single source connected to the bridge\n");
return PTR_ERR(remote_pad);
}
source_subdev = media_entity_to_v4l2_subdev(remote_pad->entity);
if (source_subdev == bridge->source_parallel.subdev)
source = &bridge->source_parallel;
else
source = &bridge->source_mipi_csi2;
if (!on) {
v4l2_subdev_call(source_subdev, video, s_stream, 0);
ret = 0;
goto disable;
}
/* PM */
ret = pm_runtime_resume_and_get(dev);
if (ret < 0)
return ret;
/* Clear */
sun6i_csi_bridge_irq_clear(csi_dev);
/* Configure */
sun6i_csi_bridge_configure(csi_dev, source);
if (capture_streaming)
sun6i_csi_capture_configure(csi_dev);
/* State Update */
if (capture_streaming)
sun6i_csi_capture_state_update(csi_dev);
/* Enable */
if (capture_streaming)
sun6i_csi_bridge_irq_enable(csi_dev);
sun6i_csi_bridge_enable(csi_dev);
ret = v4l2_subdev_call(source_subdev, video, s_stream, 1);
if (ret && ret != -ENOIOCTLCMD)
goto disable;
return 0;
disable:
if (capture_streaming)
sun6i_csi_bridge_irq_disable(csi_dev);
sun6i_csi_bridge_disable(csi_dev);
pm_runtime_put(dev);
return ret;
}
static const struct v4l2_subdev_video_ops sun6i_csi_bridge_video_ops = {
.s_stream = sun6i_csi_bridge_s_stream,
};
static void
sun6i_csi_bridge_mbus_format_prepare(struct v4l2_mbus_framefmt *mbus_format)
{
if (!sun6i_csi_bridge_format_find(mbus_format->code))
mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code;
mbus_format->field = V4L2_FIELD_NONE;
mbus_format->colorspace = V4L2_COLORSPACE_RAW;
mbus_format->quantization = V4L2_QUANTIZATION_DEFAULT;
mbus_format->xfer_func = V4L2_XFER_FUNC_DEFAULT;
}
static int sun6i_csi_bridge_init_state(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *state)
{
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
unsigned int pad = SUN6I_CSI_BRIDGE_PAD_SINK;
struct v4l2_mbus_framefmt *mbus_format =
v4l2_subdev_state_get_format(state, pad);
struct mutex *lock = &csi_dev->bridge.lock;
mutex_lock(lock);
mbus_format->code = sun6i_csi_bridge_formats[0].mbus_code;
mbus_format->width = 1280;
mbus_format->height = 720;
sun6i_csi_bridge_mbus_format_prepare(mbus_format);
mutex_unlock(lock);
return 0;
}
static int
sun6i_csi_bridge_enum_mbus_code(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *state,
struct v4l2_subdev_mbus_code_enum *code_enum)
{
if (code_enum->index >= ARRAY_SIZE(sun6i_csi_bridge_formats))
return -EINVAL;
code_enum->code = sun6i_csi_bridge_formats[code_enum->index].mbus_code;
return 0;
}
static int sun6i_csi_bridge_get_fmt(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
struct v4l2_mbus_framefmt *mbus_format = &format->format;
struct mutex *lock = &csi_dev->bridge.lock;
mutex_lock(lock);
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
*mbus_format = *v4l2_subdev_state_get_format(state,
format->pad);
else
*mbus_format = csi_dev->bridge.mbus_format;
mutex_unlock(lock);
return 0;
}
static int sun6i_csi_bridge_set_fmt(struct v4l2_subdev *subdev,
struct v4l2_subdev_state *state,
struct v4l2_subdev_format *format)
{
struct sun6i_csi_device *csi_dev = v4l2_get_subdevdata(subdev);
struct v4l2_mbus_framefmt *mbus_format = &format->format;
struct mutex *lock = &csi_dev->bridge.lock;
mutex_lock(lock);
sun6i_csi_bridge_mbus_format_prepare(mbus_format);
if (format->which == V4L2_SUBDEV_FORMAT_TRY)
*v4l2_subdev_state_get_format(state, format->pad) =
*mbus_format;
else
csi_dev->bridge.mbus_format = *mbus_format;
mutex_unlock(lock);
return 0;
}
static const struct v4l2_subdev_pad_ops sun6i_csi_bridge_pad_ops = {
.enum_mbus_code = sun6i_csi_bridge_enum_mbus_code,
.get_fmt = sun6i_csi_bridge_get_fmt,
.set_fmt = sun6i_csi_bridge_set_fmt,
};
static const struct v4l2_subdev_ops sun6i_csi_bridge_subdev_ops = {
.video = &sun6i_csi_bridge_video_ops,
.pad = &sun6i_csi_bridge_pad_ops,
};
static const struct v4l2_subdev_internal_ops sun6i_csi_bridge_internal_ops = {
.init_state = sun6i_csi_bridge_init_state,
};
/* Media Entity */
static const struct media_entity_operations sun6i_csi_bridge_entity_ops = {
.link_validate = v4l2_subdev_link_validate,
};
/* V4L2 Async */
static int sun6i_csi_bridge_link(struct sun6i_csi_device *csi_dev,
int sink_pad_index,
struct v4l2_subdev *remote_subdev,
bool enabled)
{
struct device *dev = csi_dev->dev;
struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
struct media_entity *sink_entity = &subdev->entity;
struct media_entity *source_entity = &remote_subdev->entity;
int source_pad_index;
int ret;
/* Get the first remote source pad. */
ret = media_entity_get_fwnode_pad(source_entity, remote_subdev->fwnode,
MEDIA_PAD_FL_SOURCE);
if (ret < 0) {
dev_err(dev, "missing source pad in external entity %s\n",
source_entity->name);
return -EINVAL;
}
source_pad_index = ret;
dev_dbg(dev, "creating %s:%u -> %s:%u link\n", source_entity->name,
source_pad_index, sink_entity->name, sink_pad_index);
ret = media_create_pad_link(source_entity, source_pad_index,
sink_entity, sink_pad_index,
enabled ? MEDIA_LNK_FL_ENABLED : 0);
if (ret < 0) {
dev_err(dev, "failed to create %s:%u -> %s:%u link\n",
source_entity->name, source_pad_index,
sink_entity->name, sink_pad_index);
return ret;
}
return 0;
}
static int
sun6i_csi_bridge_notifier_bound(struct v4l2_async_notifier *notifier,
struct v4l2_subdev *remote_subdev,
struct v4l2_async_connection *async_subdev)
{
struct sun6i_csi_device *csi_dev =
container_of(notifier, struct sun6i_csi_device,
bridge.notifier);
struct sun6i_csi_bridge_async_subdev *bridge_async_subdev =
container_of(async_subdev, struct sun6i_csi_bridge_async_subdev,
async_subdev);
struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
struct sun6i_csi_bridge_source *source = bridge_async_subdev->source;
bool enabled = false;
int ret;
switch (source->endpoint.base.port) {
case SUN6I_CSI_PORT_PARALLEL:
enabled = true;
break;
case SUN6I_CSI_PORT_MIPI_CSI2:
enabled = !bridge->source_parallel.expected;
break;
default:
return -EINVAL;
}
source->subdev = remote_subdev;
if (csi_dev->isp_available) {
/*
* Hook to the first available remote subdev to get v4l2 and
* media devices and register the capture device then.
*/
ret = sun6i_csi_isp_complete(csi_dev, remote_subdev->v4l2_dev);
if (ret)
return ret;
}
return sun6i_csi_bridge_link(csi_dev, SUN6I_CSI_BRIDGE_PAD_SINK,
remote_subdev, enabled);
}
static int
sun6i_csi_bridge_notifier_complete(struct v4l2_async_notifier *notifier)
{
struct sun6i_csi_device *csi_dev =
container_of(notifier, struct sun6i_csi_device,
bridge.notifier);
struct v4l2_device *v4l2_dev = &csi_dev->v4l2.v4l2_dev;
if (csi_dev->isp_available)
return 0;
return v4l2_device_register_subdev_nodes(v4l2_dev);
}
static const struct v4l2_async_notifier_operations
sun6i_csi_bridge_notifier_ops = {
.bound = sun6i_csi_bridge_notifier_bound,
.complete = sun6i_csi_bridge_notifier_complete,
};
/* Bridge */
static int sun6i_csi_bridge_source_setup(struct sun6i_csi_device *csi_dev,
struct sun6i_csi_bridge_source *source,
u32 port,
enum v4l2_mbus_type *bus_types)
{
struct device *dev = csi_dev->dev;
struct v4l2_async_notifier *notifier = &csi_dev->bridge.notifier;
struct v4l2_fwnode_endpoint *endpoint = &source->endpoint;
struct sun6i_csi_bridge_async_subdev *bridge_async_subdev;
struct fwnode_handle *handle;
int ret;
handle = fwnode_graph_get_endpoint_by_id(dev_fwnode(dev), port, 0, 0);
if (!handle)
return -ENODEV;
ret = v4l2_fwnode_endpoint_parse(handle, endpoint);
if (ret)
goto complete;
if (bus_types) {
bool valid = false;
unsigned int i;
for (i = 0; bus_types[i] != V4L2_MBUS_INVALID; i++) {
if (endpoint->bus_type == bus_types[i]) {
valid = true;
break;
}
}
if (!valid) {
dev_err(dev, "unsupported bus type for port %d\n",
port);
ret = -EINVAL;
goto complete;
}
}
bridge_async_subdev =
v4l2_async_nf_add_fwnode_remote(notifier, handle,
struct
sun6i_csi_bridge_async_subdev);
if (IS_ERR(bridge_async_subdev)) {
ret = PTR_ERR(bridge_async_subdev);
goto complete;
}
bridge_async_subdev->source = source;
source->expected = true;
complete:
fwnode_handle_put(handle);
return ret;
}
int sun6i_csi_bridge_setup(struct sun6i_csi_device *csi_dev)
{
struct device *dev = csi_dev->dev;
struct sun6i_csi_bridge *bridge = &csi_dev->bridge;
struct v4l2_device *v4l2_dev = csi_dev->v4l2_dev;
struct v4l2_subdev *subdev = &bridge->subdev;
struct v4l2_async_notifier *notifier = &bridge->notifier;
struct media_pad *pads = bridge->pads;
enum v4l2_mbus_type parallel_mbus_types[] = {
V4L2_MBUS_PARALLEL,
V4L2_MBUS_BT656,
V4L2_MBUS_INVALID
};
int ret;
mutex_init(&bridge->lock);
/* V4L2 Subdev */
v4l2_subdev_init(subdev, &sun6i_csi_bridge_subdev_ops);
subdev->internal_ops = &sun6i_csi_bridge_internal_ops;
strscpy(subdev->name, SUN6I_CSI_BRIDGE_NAME, sizeof(subdev->name));
subdev->flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
subdev->owner = THIS_MODULE;
subdev->dev = dev;
v4l2_set_subdevdata(subdev, csi_dev);
/* Media Entity */
subdev->entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
subdev->entity.ops = &sun6i_csi_bridge_entity_ops;
/* Media Pads */
pads[SUN6I_CSI_BRIDGE_PAD_SINK].flags = MEDIA_PAD_FL_SINK;
pads[SUN6I_CSI_BRIDGE_PAD_SOURCE].flags = MEDIA_PAD_FL_SOURCE |
MEDIA_PAD_FL_MUST_CONNECT;
ret = media_entity_pads_init(&subdev->entity,
SUN6I_CSI_BRIDGE_PAD_COUNT, pads);
if (ret < 0)
return ret;
/* V4L2 Subdev */
if (csi_dev->isp_available)
ret = v4l2_async_register_subdev(subdev);
else
ret = v4l2_device_register_subdev(v4l2_dev, subdev);
if (ret) {
dev_err(dev, "failed to register v4l2 subdev: %d\n", ret);
goto error_media_entity;
}
/* V4L2 Async */
if (csi_dev->isp_available)
v4l2_async_subdev_nf_init(notifier, subdev);
else
v4l2_async_nf_init(notifier, v4l2_dev);
notifier->ops = &sun6i_csi_bridge_notifier_ops;
sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_parallel,
SUN6I_CSI_PORT_PARALLEL,
parallel_mbus_types);
sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_mipi_csi2,
SUN6I_CSI_PORT_MIPI_CSI2, NULL);
ret = v4l2_async_nf_register(notifier);
if (ret) {
dev_err(dev, "failed to register v4l2 async notifier: %d\n",
ret);
goto error_v4l2_async_notifier;
}
return 0;
error_v4l2_async_notifier:
v4l2_async_nf_cleanup(notifier);
if (csi_dev->isp_available)
v4l2_async_unregister_subdev(subdev);
else
v4l2_device_unregister_subdev(subdev);
error_media_entity:
media_entity_cleanup(&subdev->entity);
return ret;
}
void sun6i_csi_bridge_cleanup(struct sun6i_csi_device *csi_dev)
{
struct v4l2_subdev *subdev = &csi_dev->bridge.subdev;
struct v4l2_async_notifier *notifier = &csi_dev->bridge.notifier;
v4l2_async_nf_unregister(notifier);
v4l2_async_nf_cleanup(notifier);
v4l2_device_unregister_subdev(subdev);
media_entity_cleanup(&subdev->entity);
}
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