bool sun6i_csi_is_format_supported(struct sun6i_csi_device *csi_dev,
u32 pixformat, u32 mbus_code)
{
- struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
+ struct v4l2_fwnode_endpoint *endpoint =
+ &csi_dev->bridge.source_parallel.endpoint;
/*
* Some video receivers have the ability to be compatible with
* 8bit and 16bit bus width.
* Identify the media bus format from device tree.
*/
- if ((v4l2->v4l2_ep.bus_type == V4L2_MBUS_PARALLEL
- || v4l2->v4l2_ep.bus_type == V4L2_MBUS_BT656)
- && v4l2->v4l2_ep.bus.parallel.bus_width == 16) {
+ if ((endpoint->bus_type == V4L2_MBUS_PARALLEL
+ || endpoint->bus_type == V4L2_MBUS_BT656)
+ && endpoint->bus.parallel.bus_width == 16) {
switch (pixformat) {
case V4L2_PIX_FMT_NV12_16L16:
case V4L2_PIX_FMT_NV12:
static void sun6i_csi_setup_bus(struct sun6i_csi_device *csi_dev)
{
- struct v4l2_fwnode_endpoint *endpoint = &csi_dev->v4l2.v4l2_ep;
+ struct v4l2_fwnode_endpoint *endpoint =
+ &csi_dev->bridge.source_parallel.endpoint;
struct sun6i_csi_config *config = &csi_dev->config;
unsigned char bus_width;
u32 flags;
/* V4L2 */
-static int sun6i_csi_link_entity(struct sun6i_csi_device *csi_dev,
- struct media_entity *entity,
- struct fwnode_handle *fwnode)
-{
- struct media_entity *sink;
- struct media_pad *sink_pad;
- int src_pad_index;
- int ret;
-
- ret = media_entity_get_fwnode_pad(entity, fwnode, MEDIA_PAD_FL_SOURCE);
- if (ret < 0) {
- dev_err(csi_dev->dev,
- "%s: no source pad in external entity %s\n", __func__,
- entity->name);
- return -EINVAL;
- }
-
- src_pad_index = ret;
-
- sink = &csi_dev->video.video_dev.entity;
- sink_pad = &csi_dev->video.pad;
-
- dev_dbg(csi_dev->dev, "creating %s:%u -> %s:%u link\n",
- entity->name, src_pad_index, sink->name, sink_pad->index);
- ret = media_create_pad_link(entity, src_pad_index, sink,
- sink_pad->index,
- MEDIA_LNK_FL_ENABLED |
- MEDIA_LNK_FL_IMMUTABLE);
- if (ret < 0) {
- dev_err(csi_dev->dev, "failed to create %s:%u -> %s:%u link\n",
- entity->name, src_pad_index,
- sink->name, sink_pad->index);
- return ret;
- }
-
- return 0;
-}
-
-static int sun6i_subdev_notify_complete(struct v4l2_async_notifier *notifier)
-{
- struct sun6i_csi_device *csi_dev =
- container_of(notifier, struct sun6i_csi_device,
- v4l2.notifier);
- struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
- struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
- struct v4l2_subdev *sd;
- int ret;
-
- dev_dbg(csi_dev->dev, "notify complete, all subdevs registered\n");
-
- sd = list_first_entry(&v4l2_dev->subdevs, struct v4l2_subdev, list);
- if (!sd)
- return -EINVAL;
-
- ret = sun6i_csi_link_entity(csi_dev, &sd->entity, sd->fwnode);
- if (ret < 0)
- return ret;
-
- ret = v4l2_device_register_subdev_nodes(v4l2_dev);
- if (ret < 0)
- return ret;
-
- return 0;
-}
-
-static const struct v4l2_async_notifier_operations sun6i_csi_async_ops = {
- .complete = sun6i_subdev_notify_complete,
-};
-
-static int sun6i_csi_fwnode_parse(struct device *dev,
- struct v4l2_fwnode_endpoint *vep,
- struct v4l2_async_subdev *asd)
-{
- struct sun6i_csi_device *csi_dev = dev_get_drvdata(dev);
-
- if (vep->base.port || vep->base.id) {
- dev_warn(dev, "Only support a single port with one endpoint\n");
- return -ENOTCONN;
- }
-
- switch (vep->bus_type) {
- case V4L2_MBUS_PARALLEL:
- case V4L2_MBUS_BT656:
- csi_dev->v4l2.v4l2_ep = *vep;
- return 0;
- default:
- dev_err(dev, "Unsupported media bus type\n");
- return -ENOTCONN;
- }
-}
-
static int sun6i_csi_v4l2_setup(struct sun6i_csi_device *csi_dev)
{
struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
struct media_device *media_dev = &v4l2->media_dev;
struct v4l2_device *v4l2_dev = &v4l2->v4l2_dev;
- struct v4l2_async_notifier *notifier = &v4l2->notifier;
struct device *dev = csi_dev->dev;
int ret;
goto error_media;
}
- /* Video */
-
- ret = sun6i_video_setup(csi_dev);
- if (ret)
- goto error_v4l2_device;
-
- /* V4L2 Async */
-
- v4l2_async_nf_init(notifier);
- notifier->ops = &sun6i_csi_async_ops;
-
- ret = v4l2_async_nf_parse_fwnode_endpoints(dev, notifier,
- sizeof(struct
- v4l2_async_subdev),
- sun6i_csi_fwnode_parse);
- if (ret)
- goto error_video;
-
- ret = v4l2_async_nf_register(v4l2_dev, 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);
-
-error_video:
- sun6i_video_cleanup(csi_dev);
-
-error_v4l2_device:
- v4l2_device_unregister(&v4l2->v4l2_dev);
-
error_media:
media_device_unregister(media_dev);
media_device_cleanup(media_dev);
struct sun6i_csi_v4l2 *v4l2 = &csi_dev->v4l2;
media_device_unregister(&v4l2->media_dev);
- v4l2_async_nf_unregister(&v4l2->notifier);
- v4l2_async_nf_cleanup(&v4l2->notifier);
- sun6i_video_cleanup(csi_dev);
v4l2_device_unregister(&v4l2->v4l2_dev);
media_device_cleanup(&v4l2->media_dev);
}
if (ret)
goto error_resources;
+ ret = sun6i_csi_bridge_setup(csi_dev);
+ if (ret)
+ goto error_v4l2;
+
+ ret = sun6i_video_setup(csi_dev);
+ if (ret)
+ goto error_bridge;
+
return 0;
+error_bridge:
+ sun6i_csi_bridge_cleanup(csi_dev);
+
+error_v4l2:
+ sun6i_csi_v4l2_cleanup(csi_dev);
+
error_resources:
sun6i_csi_resources_cleanup(csi_dev);
{
struct sun6i_csi_device *csi_dev = platform_get_drvdata(pdev);
+ sun6i_video_cleanup(csi_dev);
+ sun6i_csi_bridge_cleanup(csi_dev);
sun6i_csi_v4l2_cleanup(csi_dev);
sun6i_csi_resources_cleanup(csi_dev);
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright 2021-2022 Bootlin
+ * Author: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
+ */
+
+#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"
+
+/* Format */
+
+static const u32 sun6i_csi_bridge_mbus_codes[] = {
+ /* Bayer */
+ MEDIA_BUS_FMT_SBGGR8_1X8,
+ MEDIA_BUS_FMT_SGBRG8_1X8,
+ MEDIA_BUS_FMT_SGRBG8_1X8,
+ MEDIA_BUS_FMT_SRGGB8_1X8,
+ MEDIA_BUS_FMT_SBGGR10_1X10,
+ MEDIA_BUS_FMT_SGBRG10_1X10,
+ MEDIA_BUS_FMT_SGRBG10_1X10,
+ MEDIA_BUS_FMT_SRGGB10_1X10,
+ MEDIA_BUS_FMT_SBGGR12_1X12,
+ MEDIA_BUS_FMT_SGBRG12_1X12,
+ MEDIA_BUS_FMT_SGRBG12_1X12,
+ MEDIA_BUS_FMT_SRGGB12_1X12,
+ /* RGB */
+ MEDIA_BUS_FMT_RGB565_2X8_LE,
+ MEDIA_BUS_FMT_RGB565_2X8_BE,
+ /* YUV422 */
+ MEDIA_BUS_FMT_YUYV8_2X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_YVYU8_2X8,
+ MEDIA_BUS_FMT_UYVY8_2X8,
+ MEDIA_BUS_FMT_VYUY8_2X8,
+ MEDIA_BUS_FMT_YUYV8_1X16,
+ MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_YVYU8_1X16,
+ MEDIA_BUS_FMT_UYVY8_1X16,
+ MEDIA_BUS_FMT_VYUY8_1X16,
+ /* Compressed */
+ MEDIA_BUS_FMT_JPEG_1X8,
+};
+
+static bool sun6i_csi_bridge_mbus_code_check(u32 mbus_code)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(sun6i_csi_bridge_mbus_codes); i++)
+ if (sun6i_csi_bridge_mbus_codes[i] == mbus_code)
+ return true;
+
+ return false;
+}
+
+/* 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];
+ struct device *dev = csi_dev->dev;
+ struct v4l2_subdev *source_subdev;
+ struct media_pad *remote_pad;
+ /* Initialize to 0 to use both in disable label (ret != 0) and off. */
+ int ret = 0;
+
+ /* 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 (!on) {
+ v4l2_subdev_call(source_subdev, video, s_stream, 0);
+ goto disable;
+ }
+
+ ret = v4l2_subdev_call(source_subdev, video, s_stream, 1);
+ if (ret && ret != -ENOIOCTLCMD)
+ goto disable;
+
+ return 0;
+
+disable:
+
+ 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_mbus_code_check(mbus_format->code))
+ mbus_format->code = sun6i_csi_bridge_mbus_codes[0];
+
+ 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_cfg(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_get_try_format(subdev, state, pad);
+ struct mutex *lock = &csi_dev->bridge.lock;
+
+ mutex_lock(lock);
+
+ mbus_format->code = sun6i_csi_bridge_mbus_codes[0];
+ 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_mbus_codes))
+ return -EINVAL;
+
+ code_enum->code = sun6i_csi_bridge_mbus_codes[code_enum->index];
+
+ 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_get_try_format(subdev, 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_get_try_format(subdev, 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 = {
+ .init_cfg = sun6i_csi_bridge_init_cfg,
+ .enum_mbus_code = sun6i_csi_bridge_enum_mbus_code,
+ .get_fmt = sun6i_csi_bridge_get_fmt,
+ .set_fmt = sun6i_csi_bridge_set_fmt,
+};
+
+const struct v4l2_subdev_ops sun6i_csi_bridge_subdev_ops = {
+ .video = &sun6i_csi_bridge_video_ops,
+ .pad = &sun6i_csi_bridge_pad_ops,
+};
+
+/* 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_subdev *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_source *source = bridge_async_subdev->source;
+ bool enabled;
+
+ switch (source->endpoint.base.port) {
+ case SUN6I_CSI_PORT_PARALLEL:
+ enabled = true;
+ break;
+ default:
+ break;
+ }
+
+ source->subdev = remote_subdev;
+
+ 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;
+
+ 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.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);
+ 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 */
+
+ 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 */
+
+ v4l2_async_nf_init(notifier);
+ notifier->ops = &sun6i_csi_bridge_notifier_ops;
+
+ sun6i_csi_bridge_source_setup(csi_dev, &bridge->source_parallel,
+ SUN6I_CSI_PORT_PARALLEL,
+ parallel_mbus_types);
+
+ ret = v4l2_async_nf_register(v4l2_dev, 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);
+
+ 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);
+}
projects / linux.git / commitdiff