| Message ID | 20201224010907.263125-15-djrscally@gmail.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | Add functionality to ipu3-cio2 driver allowing software_node connections to sensors on platforms designed for Windows | expand |
On Thu, Dec 24, 2020 at 3:12 AM Daniel Scally <djrscally@gmail.com> wrote: > > Currently on platforms designed for Windows, connections between CIO2 and > sensors are not properly defined in DSDT. This patch extends the ipu3-cio2 > driver to compensate by building software_node connections, parsing the > connection properties from the sensor's SSDB buffer. Few nitpicks below, after addressing them Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > Suggested-by: Jordan Hand <jorhand@linux.microsoft.com> > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > Signed-off-by: Daniel Scally <djrscally@gmail.com> > --- > Changes in v3 > - Used Laurent's suggestion to simplify initing the property names > - Wrapped some lines > - Fixed return and error handling for cio2_bridge_read_acpi_buffer() > - Returned an error if more sensors than available ports are detected > - Used defines for port/endpoint name formats and the bus-type property > - Some bits of cleanup > > MAINTAINERS | 1 + > drivers/media/pci/intel/ipu3/Kconfig | 18 ++ > drivers/media/pci/intel/ipu3/Makefile | 1 + > drivers/media/pci/intel/ipu3/cio2-bridge.c | 272 ++++++++++++++++++ > drivers/media/pci/intel/ipu3/cio2-bridge.h | 122 ++++++++ > drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 34 +++ > drivers/media/pci/intel/ipu3/ipu3-cio2.h | 6 + > 7 files changed, 454 insertions(+) > create mode 100644 drivers/media/pci/intel/ipu3/cio2-bridge.c > create mode 100644 drivers/media/pci/intel/ipu3/cio2-bridge.h > > diff --git a/MAINTAINERS b/MAINTAINERS > index 16b544624577..e7784b4bc8ea 100644 > --- a/MAINTAINERS > +++ b/MAINTAINERS > @@ -8943,6 +8943,7 @@ INTEL IPU3 CSI-2 CIO2 DRIVER > M: Yong Zhi <yong.zhi@intel.com> > M: Sakari Ailus <sakari.ailus@linux.intel.com> > M: Bingbu Cao <bingbu.cao@intel.com> > +M: Dan Scally <djrscally@gmail.com> > R: Tianshu Qiu <tian.shu.qiu@intel.com> > L: linux-media@vger.kernel.org > S: Maintained > diff --git a/drivers/media/pci/intel/ipu3/Kconfig b/drivers/media/pci/intel/ipu3/Kconfig > index 82d7f17e6a02..dcf5c4b74673 100644 > --- a/drivers/media/pci/intel/ipu3/Kconfig > +++ b/drivers/media/pci/intel/ipu3/Kconfig > @@ -16,3 +16,21 @@ config VIDEO_IPU3_CIO2 > Say Y or M here if you have a Skylake/Kaby Lake SoC with MIPI CSI-2 > connected camera. > The module will be called ipu3-cio2. > + > +config CIO2_BRIDGE > + bool "IPU3 CIO2 Sensors Bridge" > + depends on VIDEO_IPU3_CIO2 > + help > + This extension provides an API for the ipu3-cio2 driver to create > + connections to cameras that are hidden in SSDB buffer in ACPI. It in the > + can be used to enable support for cameras in detachable / hybrid > + devices that ship with Windows. > + > + Say Y here if your device is a detachable / hybrid laptop that comes > + with Windows installed by the OEM, for example: > + > + - Microsoft Surface models (except Surface Pro 3) > + - The Lenovo Miix line (for example the 510, 520, 710 and 720) > + - Dell 7285 > + > + If in doubt, say N here. > diff --git a/drivers/media/pci/intel/ipu3/Makefile b/drivers/media/pci/intel/ipu3/Makefile > index 429d516452e4..933777e6ea8a 100644 > --- a/drivers/media/pci/intel/ipu3/Makefile > +++ b/drivers/media/pci/intel/ipu3/Makefile > @@ -2,3 +2,4 @@ > obj-$(CONFIG_VIDEO_IPU3_CIO2) += ipu3-cio2.o > > ipu3-cio2-y += ipu3-cio2-main.o > +ipu3-cio2-$(CONFIG_CIO2_BRIDGE) += cio2-bridge.o > diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.c b/drivers/media/pci/intel/ipu3/cio2-bridge.c > new file mode 100644 > index 000000000000..3f4ae172fd25 > --- /dev/null > +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.c > @@ -0,0 +1,272 @@ > +// SPDX-License-Identifier: GPL-2.0 > +/* Author: Dan Scally <djrscally@gmail.com> */ > + > +#include <linux/acpi.h> > +#include <linux/device.h> > +#include <linux/pci.h> > +#include <linux/property.h> > +#include <media/v4l2-fwnode.h> > + > +#include "cio2-bridge.h" > + > +/* > + * Extend this array with ACPI Hardware ID's of devices known to be working ID's -> IDs ? > + * plus the number of link-frequencies expected by their drivers, along with > + * the frequency values in hertz. This is somewhat opportunistic way of adding > + * support for this for now in the hopes of a better source for the information > + * (possibly some encoded value in the SSDB buffer that we're unaware of) > + * becoming apparent in the future. > + * > + * Do not add an entry for a sensor that is not actually supported. > + */ > +static const struct cio2_sensor_config cio2_supported_sensors[] = { > + CIO2_SENSOR_CONFIG("INT33BE", 0), > + CIO2_SENSOR_CONFIG("OVTI2680", 0), > +}; > + > +static const struct cio2_property_names prop_names = { > + .clock_frequency = "clock-frequency", > + .rotation = "rotation", > + .bus_type = "bus-type", > + .data_lanes = "data-lanes", > + .remote_endpoint = "remote-endpoint", > + .link_frequencies = "link-frequencies", > +}; > + > +static int cio2_bridge_read_acpi_buffer(struct acpi_device *adev, char *id, > + void *data, u32 size) > +{ > + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; > + union acpi_object *obj; > + acpi_status status; > + int ret = 0; > + > + status = acpi_evaluate_object(adev->handle, id, NULL, &buffer); > + if (ACPI_FAILURE(status)) > + return -ENODEV; > + > + obj = buffer.pointer; > + if (!obj) { > + dev_err(&adev->dev, "Couldn't locate ACPI buffer\n"); > + return -ENODEV; > + } > + > + if (obj->type != ACPI_TYPE_BUFFER) { > + dev_err(&adev->dev, "Not an ACPI buffer\n"); > + ret = -ENODEV; > + goto out_free_buff; > + } > + > + if (obj->buffer.length > size) { > + dev_err(&adev->dev, "Given buffer is too small\n"); > + ret = -EINVAL; > + goto out_free_buff; > + } > + > + memcpy(data, obj->buffer.pointer, obj->buffer.length); > + > +out_free_buff: > + kfree(buffer.pointer); > + return ret; > +} > + > +static void cio2_bridge_create_fwnode_properties(struct cio2_sensor *sensor, > + const struct cio2_sensor_config *cfg) > +{ > + unsigned int i; > + > + sensor->prop_names = prop_names; > + > + for (i = 0; i < 4; i++) 4 here and below, can we have a local define for them, like #define CIO2_MAX_LANES 4 > + sensor->data_lanes[i] = i + 1; > + > + sensor->local_ref[0].node = &sensor->swnodes[SWNODE_CIO2_ENDPOINT]; > + sensor->remote_ref[0].node = &sensor->swnodes[SWNODE_SENSOR_ENDPOINT]; > + > + sensor->dev_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.clock_frequency, > + sensor->ssdb.mclkspeed); > + sensor->dev_properties[1] = PROPERTY_ENTRY_U8(sensor->prop_names.rotation, > + sensor->ssdb.degree); > + > + sensor->ep_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.bus_type, > + V4L2_FWNODE_BUS_TYPE_CSI2_DPHY); > + sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, > + sensor->data_lanes, > + sensor->ssdb.lanes); > + sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, > + sensor->local_ref); > + > + if (cfg->nr_link_freqs > 0) > + sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN( > + sensor->prop_names.link_frequencies, > + cfg->link_freqs, > + cfg->nr_link_freqs); > + > + sensor->cio2_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, > + sensor->data_lanes, > + sensor->ssdb.lanes); > + sensor->cio2_properties[1] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, > + sensor->remote_ref); > +} > + > +static void cio2_bridge_init_swnode_names(struct cio2_sensor *sensor) > +{ > + snprintf(sensor->node_names.remote_port, sizeof(sensor->node_names.remote_port), > + FWNODE_GRAPH_PORT_NAME_FORMAT, sensor->ssdb.link); > + snprintf(sensor->node_names.port, sizeof(sensor->node_names.port), > + FWNODE_GRAPH_PORT_NAME_FORMAT, 0); /* Always port 0 */ > + snprintf(sensor->node_names.endpoint, sizeof(sensor->node_names.endpoint), > + FWNODE_GRAPH_ENDPOINT_NAME_FORMAT, 0); /* And endpoint 0 */ > +} > + > +static void cio2_bridge_create_connection_swnodes(struct cio2_bridge *bridge, > + struct cio2_sensor *sensor) > +{ > + struct software_node *nodes = sensor->swnodes; > + > + cio2_bridge_init_swnode_names(sensor); > + > + nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name, > + sensor->dev_properties); > + nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port, > + &nodes[SWNODE_SENSOR_HID]); > + nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, > + &nodes[SWNODE_SENSOR_PORT], > + sensor->ep_properties); > + nodes[SWNODE_CIO2_PORT] = NODE_PORT(sensor->node_names.remote_port, > + &bridge->cio2_hid_node); > + nodes[SWNODE_CIO2_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, > + &nodes[SWNODE_CIO2_PORT], > + sensor->cio2_properties); > +} > + > +static void cio2_bridge_unregister_sensors(struct cio2_bridge *bridge) > +{ > + struct cio2_sensor *sensor; > + unsigned int i; > + > + for (i = 0; i < bridge->n_sensors; i++) { > + sensor = &bridge->sensors[i]; > + software_node_unregister_nodes(sensor->swnodes); > + acpi_dev_put(sensor->adev); > + } > +} > + > +static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge, > + struct pci_dev *cio2) > +{ > + struct fwnode_handle *fwnode; > + struct cio2_sensor *sensor; > + struct acpi_device *adev; > + unsigned int i; > + int ret = 0; You may drop this assignment and... > + for (i = 0; i < ARRAY_SIZE(cio2_supported_sensors); i++) { > + const struct cio2_sensor_config *cfg = &cio2_supported_sensors[i]; > + > + for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) { > + if (bridge->n_sensors >= CIO2_NUM_PORTS) { > + dev_err(&cio2->dev, "Exceeded available CIO2 ports\n"); > + cio2_bridge_unregister_sensors(bridge); > + ret = -EINVAL; > + goto err_out; > + } > + > + if (!adev->status.enabled) > + continue; > + > + sensor = &bridge->sensors[bridge->n_sensors]; > + sensor->adev = adev; > + strscpy(sensor->name, cfg->hid, sizeof(sensor->name)); > + > + ret = cio2_bridge_read_acpi_buffer(adev, "SSDB", > + &sensor->ssdb, > + sizeof(sensor->ssdb)); > + if (ret) > + goto err_put_adev; > + > + if (sensor->ssdb.lanes > 4) { CIO2_MAX_LANES > + dev_err(&adev->dev, > + "Number of lanes in SSDB is invalid\n"); > + ret = -EINVAL; > + goto err_put_adev; > + } > + > + cio2_bridge_create_fwnode_properties(sensor, cfg); > + cio2_bridge_create_connection_swnodes(bridge, sensor); > + > + ret = software_node_register_nodes(sensor->swnodes); > + if (ret) > + goto err_put_adev; > + > + fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_SENSOR_HID]); > + if (!fwnode) { > + ret = -ENODEV; > + goto err_free_swnodes; > + } > + > + adev->fwnode.secondary = fwnode; > + > + dev_info(&cio2->dev, "Found supported sensor %s\n", > + acpi_dev_name(adev)); > + > + bridge->n_sensors++; > + } > + } > + return ret; ...use here return 0; directly. > +err_free_swnodes: > + software_node_unregister_nodes(sensor->swnodes); > +err_put_adev: > + acpi_dev_put(sensor->adev); > +err_out: > + return ret; > +} > + > +int cio2_bridge_init(struct pci_dev *cio2) > +{ > + struct device *dev = &cio2->dev; > + struct fwnode_handle *fwnode; > + struct cio2_bridge *bridge; > + int ret; > + > + bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); > + if (!bridge) > + return -ENOMEM; > + > + strscpy(bridge->cio2_node_name, CIO2_HID, sizeof(bridge->cio2_node_name)); > + bridge->cio2_hid_node.name = bridge->cio2_node_name; > + > + ret = software_node_register(&bridge->cio2_hid_node); > + if (ret < 0) { > + dev_err(dev, "Failed to register the CIO2 HID node\n"); > + goto err_free_bridge; > + } > + > + ret = cio2_bridge_connect_sensors(bridge, cio2); > + if (ret || bridge->n_sensors == 0) > + goto err_unregister_cio2; > + > + dev_info(dev, "Connected %d cameras\n", bridge->n_sensors); > + > + fwnode = software_node_fwnode(&bridge->cio2_hid_node); > + if (!fwnode) { > + dev_err(dev, "Error getting fwnode from cio2 software_node\n"); > + ret = -ENODEV; > + goto err_unregister_sensors; > + } > + > + set_secondary_fwnode(dev, fwnode); > + > + return 0; > + > +err_unregister_sensors: > + cio2_bridge_unregister_sensors(bridge); > +err_unregister_cio2: > + software_node_unregister(&bridge->cio2_hid_node); > +err_free_bridge: > + kfree(bridge); > + > + return ret; > +} > diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.h b/drivers/media/pci/intel/ipu3/cio2-bridge.h > new file mode 100644 > index 000000000000..004b608f322f > --- /dev/null > +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.h > @@ -0,0 +1,122 @@ > +/* SPDX-License-Identifier: GPL-2.0 */ > +/* Author: Dan Scally <djrscally@gmail.com> */ > +#ifndef __CIO2_BRIDGE_H > +#define __CIO2_BRIDGE_H > + > +#include <linux/property.h> > + > +#define CIO2_HID "INT343E" > +#define CIO2_NUM_PORTS 4 > +#define MAX_NUM_LINK_FREQS 3 > + > +#define CIO2_SENSOR_CONFIG(_HID, _NR, ...) \ > + { \ > + .hid = _HID, \ > + .nr_link_freqs = _NR, \ > + .link_freqs = { __VA_ARGS__ } \ > + } > + > +#define NODE_SENSOR(_HID, _PROPS) \ > + ((const struct software_node) { \ > + .name = _HID, \ > + .properties = _PROPS, \ > + }) > + > +#define NODE_PORT(_PORT, _SENSOR_NODE) \ > + ((const struct software_node) { \ > + _PORT, \ > + _SENSOR_NODE, \ > + }) > + > +#define NODE_ENDPOINT(_EP, _PORT, _PROPS) \ > + ((const struct software_node) { \ > + _EP, \ > + _PORT, \ > + _PROPS, \ > + }) > + > +enum cio2_sensor_swnodes { > + SWNODE_SENSOR_HID, > + SWNODE_SENSOR_PORT, > + SWNODE_SENSOR_ENDPOINT, > + SWNODE_CIO2_PORT, > + SWNODE_CIO2_ENDPOINT, > + SWNODE_COUNT, No comma? > +}; > + > +/* Data representation as it is in ACPI SSDB buffer */ > +struct cio2_sensor_ssdb { > + u8 version; > + u8 sku; > + u8 guid_csi2[16]; > + u8 devfunction; > + u8 bus; > + u32 dphylinkenfuses; > + u32 clockdiv; > + u8 link; > + u8 lanes; > + u32 csiparams[10]; > + u32 maxlanespeed; > + u8 sensorcalibfileidx; > + u8 sensorcalibfileidxInMBZ[3]; > + u8 romtype; > + u8 vcmtype; > + u8 platforminfo; > + u8 platformsubinfo; > + u8 flash; > + u8 privacyled; > + u8 degree; > + u8 mipilinkdefined; > + u32 mclkspeed; > + u8 controllogicid; > + u8 reserved1[3]; > + u8 mclkport; > + u8 reserved2[13]; > +} __packed; > + > +struct cio2_property_names { > + char clock_frequency[16]; > + char rotation[9]; > + char bus_type[9]; > + char data_lanes[11]; > + char remote_endpoint[16]; > + char link_frequencies[17]; > +}; > + > +struct cio2_node_names { > + char port[7]; > + char endpoint[11]; > + char remote_port[7]; > +}; > + > +struct cio2_sensor_config { > + const char *hid; > + const u8 nr_link_freqs; > + const u64 link_freqs[MAX_NUM_LINK_FREQS]; > +}; > + > +struct cio2_sensor { > + char name[ACPI_ID_LEN]; > + struct acpi_device *adev; > + > + struct software_node swnodes[6]; > + struct cio2_node_names node_names; > + > + u32 data_lanes[4]; > + struct cio2_sensor_ssdb ssdb; > + struct cio2_property_names prop_names; > + struct property_entry ep_properties[5]; > + struct property_entry dev_properties[3]; > + struct property_entry cio2_properties[3]; > + struct software_node_ref_args local_ref[1]; > + struct software_node_ref_args remote_ref[1]; > +}; > + > +struct cio2_bridge { > + char cio2_node_name[ACPI_ID_LEN]; > + struct software_node cio2_hid_node; > + unsigned int n_sensors; > + struct cio2_sensor sensors[CIO2_NUM_PORTS]; > +}; > + > +#endif > diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c > index 36e354ecf71e..68ff28abc6a3 100644 > --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c > +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c > @@ -1702,11 +1702,28 @@ static void cio2_queues_exit(struct cio2_device *cio2) > cio2_queue_exit(cio2, &cio2->queue[i]); > } > > +static bool cio2_check_fwnode_graph(struct fwnode_handle *fwnode) > +{ > + struct fwnode_handle *endpoint; > + > + if (IS_ERR_OR_NULL(fwnode)) > + return false; > + > + endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); > + if (endpoint) { > + fwnode_handle_put(endpoint); > + return true; > + } > + > + return cio2_check_fwnode_graph(fwnode->secondary); > +} > + > /**************** PCI interface ****************/ > > static int cio2_pci_probe(struct pci_dev *pci_dev, > const struct pci_device_id *id) > { > + struct fwnode_handle *fwnode = dev_fwnode(&pci_dev->dev); > struct cio2_device *cio2; > int r; > > @@ -1715,6 +1732,23 @@ static int cio2_pci_probe(struct pci_dev *pci_dev, > return -ENOMEM; > cio2->pci_dev = pci_dev; > > + /* > + * On some platforms no connections to sensors are defined in firmware, > + * if the device has no endpoints then we can try to build those as > + * software_nodes parsed from SSDB. > + */ > + if (!cio2_check_fwnode_graph(fwnode)) { > + if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) { > + dev_err(&pci_dev->dev, > + "fwnode graph has no endpoints connected\n"); One line? > + return -EINVAL; > + } > + > + r = cio2_bridge_init(pci_dev); > + if (r) > + return r; > + } > + > r = pcim_enable_device(pci_dev); > if (r) { > dev_err(&pci_dev->dev, "failed to enable device (%d)\n", r); > diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h b/drivers/media/pci/intel/ipu3/ipu3-cio2.h > index ccf0b85ae36f..520a27c9cdad 100644 > --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h > +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h > @@ -437,4 +437,10 @@ static inline struct cio2_queue *vb2q_to_cio2_queue(struct vb2_queue *vq) > return container_of(vq, struct cio2_queue, vbq); > } > > +#if IS_ENABLED(CONFIG_CIO2_BRIDGE) > +int cio2_bridge_init(struct pci_dev *cio2); > +#else > +int cio2_bridge_init(struct pci_dev *cio2) { return 0; } > +#endif > + > #endif > -- > 2.25.1 >
Hi Andy On 24/12/2020 12:54, Andy Shevchenko wrote: > On Thu, Dec 24, 2020 at 3:12 AM Daniel Scally <djrscally@gmail.com> wrote: >> >> Currently on platforms designed for Windows, connections between CIO2 and >> sensors are not properly defined in DSDT. This patch extends the ipu3-cio2 >> driver to compensate by building software_node connections, parsing the >> connection properties from the sensor's SSDB buffer. > > Few nitpicks below, after addressing them > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> Thanks, and for all the time you've put into this series >> +/* >> + * Extend this array with ACPI Hardware ID's of devices known to be working > > ID's -> IDs ? Yes, turns out I'm pretty bad at apostrophes. >> +static void cio2_bridge_create_fwnode_properties(struct cio2_sensor *sensor, >> + const struct cio2_sensor_config *cfg) >> +{ >> + unsigned int i; >> + >> + sensor->prop_names = prop_names; >> + >> + for (i = 0; i < 4; i++) > > 4 here and below, can we have a local define for them, like > > #define CIO2_MAX_LANES 4 Done and for the other place it's mentioned below. >> +static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge, >> + struct pci_dev *cio2) >> +{ >> + struct fwnode_handle *fwnode; >> + struct cio2_sensor *sensor; >> + struct acpi_device *adev; >> + unsigned int i; >> + int ret = 0; > > You may drop this assignment and... > ... > >> + return ret; > > ...use here > > return 0; > > directly. Done >> +enum cio2_sensor_swnodes { >> + SWNODE_SENSOR_HID, >> + SWNODE_SENSOR_PORT, >> + SWNODE_SENSOR_ENDPOINT, >> + SWNODE_CIO2_PORT, >> + SWNODE_CIO2_ENDPOINT, > >> + SWNODE_COUNT, > > No comma? Done >> @@ -1715,6 +1732,23 @@ static int cio2_pci_probe(struct pci_dev *pci_dev, >> return -ENOMEM; >> cio2->pci_dev = pci_dev; >> >> + /* >> + * On some platforms no connections to sensors are defined in firmware, >> + * if the device has no endpoints then we can try to build those as >> + * software_nodes parsed from SSDB. >> + */ >> + if (!cio2_check_fwnode_graph(fwnode)) { >> + if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) { > >> + dev_err(&pci_dev->dev, >> + "fwnode graph has no endpoints connected\n"); > > One line? Done
Hi Andy, Daniel, On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: > On Thu, Dec 24, 2020 at 3:12 AM Daniel Scally <djrscally@gmail.com> wrote: > > > > Currently on platforms designed for Windows, connections between CIO2 and > > sensors are not properly defined in DSDT. This patch extends the ipu3-cio2 > > driver to compensate by building software_node connections, parsing the > > connection properties from the sensor's SSDB buffer. > > Few nitpicks below, after addressing them > Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com> > > > Suggested-by: Jordan Hand <jorhand@linux.microsoft.com> > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> > > Signed-off-by: Daniel Scally <djrscally@gmail.com> > > --- > > Changes in v3 > > - Used Laurent's suggestion to simplify initing the property names > > - Wrapped some lines > > - Fixed return and error handling for cio2_bridge_read_acpi_buffer() > > - Returned an error if more sensors than available ports are detected > > - Used defines for port/endpoint name formats and the bus-type property > > - Some bits of cleanup > > > > MAINTAINERS | 1 + > > drivers/media/pci/intel/ipu3/Kconfig | 18 ++ > > drivers/media/pci/intel/ipu3/Makefile | 1 + > > drivers/media/pci/intel/ipu3/cio2-bridge.c | 272 ++++++++++++++++++ > > drivers/media/pci/intel/ipu3/cio2-bridge.h | 122 ++++++++ > > drivers/media/pci/intel/ipu3/ipu3-cio2-main.c | 34 +++ > > drivers/media/pci/intel/ipu3/ipu3-cio2.h | 6 + > > 7 files changed, 454 insertions(+) > > create mode 100644 drivers/media/pci/intel/ipu3/cio2-bridge.c > > create mode 100644 drivers/media/pci/intel/ipu3/cio2-bridge.h > > > > diff --git a/MAINTAINERS b/MAINTAINERS > > index 16b544624577..e7784b4bc8ea 100644 > > --- a/MAINTAINERS > > +++ b/MAINTAINERS > > @@ -8943,6 +8943,7 @@ INTEL IPU3 CSI-2 CIO2 DRIVER > > M: Yong Zhi <yong.zhi@intel.com> > > M: Sakari Ailus <sakari.ailus@linux.intel.com> > > M: Bingbu Cao <bingbu.cao@intel.com> > > +M: Dan Scally <djrscally@gmail.com> > > R: Tianshu Qiu <tian.shu.qiu@intel.com> > > L: linux-media@vger.kernel.org > > S: Maintained > > diff --git a/drivers/media/pci/intel/ipu3/Kconfig b/drivers/media/pci/intel/ipu3/Kconfig > > index 82d7f17e6a02..dcf5c4b74673 100644 > > --- a/drivers/media/pci/intel/ipu3/Kconfig > > +++ b/drivers/media/pci/intel/ipu3/Kconfig > > @@ -16,3 +16,21 @@ config VIDEO_IPU3_CIO2 > > Say Y or M here if you have a Skylake/Kaby Lake SoC with MIPI CSI-2 > > connected camera. > > The module will be called ipu3-cio2. > > + > > +config CIO2_BRIDGE > > + bool "IPU3 CIO2 Sensors Bridge" > > + depends on VIDEO_IPU3_CIO2 > > + help > > + This extension provides an API for the ipu3-cio2 driver to create > > + connections to cameras that are hidden in SSDB buffer in ACPI. It > > in the > > > + can be used to enable support for cameras in detachable / hybrid > > + devices that ship with Windows. > > + > > + Say Y here if your device is a detachable / hybrid laptop that comes > > + with Windows installed by the OEM, for example: > > + > > + - Microsoft Surface models (except Surface Pro 3) > > + - The Lenovo Miix line (for example the 510, 520, 710 and 720) > > + - Dell 7285 > > + > > + If in doubt, say N here. > > diff --git a/drivers/media/pci/intel/ipu3/Makefile b/drivers/media/pci/intel/ipu3/Makefile > > index 429d516452e4..933777e6ea8a 100644 > > --- a/drivers/media/pci/intel/ipu3/Makefile > > +++ b/drivers/media/pci/intel/ipu3/Makefile > > @@ -2,3 +2,4 @@ > > obj-$(CONFIG_VIDEO_IPU3_CIO2) += ipu3-cio2.o > > > > ipu3-cio2-y += ipu3-cio2-main.o > > +ipu3-cio2-$(CONFIG_CIO2_BRIDGE) += cio2-bridge.o > > diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.c b/drivers/media/pci/intel/ipu3/cio2-bridge.c > > new file mode 100644 > > index 000000000000..3f4ae172fd25 > > --- /dev/null > > +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.c > > @@ -0,0 +1,272 @@ > > +// SPDX-License-Identifier: GPL-2.0 > > +/* Author: Dan Scally <djrscally@gmail.com> */ > > + > > +#include <linux/acpi.h> > > +#include <linux/device.h> > > +#include <linux/pci.h> > > +#include <linux/property.h> > > +#include <media/v4l2-fwnode.h> > > + > > +#include "cio2-bridge.h" > > + > > +/* > > + * Extend this array with ACPI Hardware ID's of devices known to be working > > ID's -> IDs ? > > > + * plus the number of link-frequencies expected by their drivers, along with > > + * the frequency values in hertz. This is somewhat opportunistic way of adding > > + * support for this for now in the hopes of a better source for the information > > + * (possibly some encoded value in the SSDB buffer that we're unaware of) > > + * becoming apparent in the future. > > + * > > + * Do not add an entry for a sensor that is not actually supported. > > + */ > > +static const struct cio2_sensor_config cio2_supported_sensors[] = { > > + CIO2_SENSOR_CONFIG("INT33BE", 0), > > + CIO2_SENSOR_CONFIG("OVTI2680", 0), > > +}; > > + > > +static const struct cio2_property_names prop_names = { > > + .clock_frequency = "clock-frequency", > > + .rotation = "rotation", > > + .bus_type = "bus-type", > > + .data_lanes = "data-lanes", > > + .remote_endpoint = "remote-endpoint", > > + .link_frequencies = "link-frequencies", > > +}; > > + > > +static int cio2_bridge_read_acpi_buffer(struct acpi_device *adev, char *id, > > + void *data, u32 size) > > +{ > > + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; > > + union acpi_object *obj; > > + acpi_status status; > > + int ret = 0; > > + > > + status = acpi_evaluate_object(adev->handle, id, NULL, &buffer); > > + if (ACPI_FAILURE(status)) > > + return -ENODEV; > > + > > + obj = buffer.pointer; > > + if (!obj) { > > + dev_err(&adev->dev, "Couldn't locate ACPI buffer\n"); > > + return -ENODEV; > > + } > > + > > + if (obj->type != ACPI_TYPE_BUFFER) { > > + dev_err(&adev->dev, "Not an ACPI buffer\n"); > > + ret = -ENODEV; > > + goto out_free_buff; > > + } > > + > > + if (obj->buffer.length > size) { > > + dev_err(&adev->dev, "Given buffer is too small\n"); > > + ret = -EINVAL; > > + goto out_free_buff; > > + } > > + > > + memcpy(data, obj->buffer.pointer, obj->buffer.length); > > + > > +out_free_buff: > > + kfree(buffer.pointer); > > + return ret; > > +} > > + > > +static void cio2_bridge_create_fwnode_properties(struct cio2_sensor *sensor, > > + const struct cio2_sensor_config *cfg) > > +{ > > + unsigned int i; > > + > > + sensor->prop_names = prop_names; > > + > > + for (i = 0; i < 4; i++) > > 4 here and below, can we have a local define for them, like > > #define CIO2_MAX_LANES 4 > > > + sensor->data_lanes[i] = i + 1; > > + > > + sensor->local_ref[0].node = &sensor->swnodes[SWNODE_CIO2_ENDPOINT]; > > + sensor->remote_ref[0].node = &sensor->swnodes[SWNODE_SENSOR_ENDPOINT]; > > + > > + sensor->dev_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.clock_frequency, > > + sensor->ssdb.mclkspeed); > > + sensor->dev_properties[1] = PROPERTY_ENTRY_U8(sensor->prop_names.rotation, > > + sensor->ssdb.degree); > > + > > + sensor->ep_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.bus_type, > > + V4L2_FWNODE_BUS_TYPE_CSI2_DPHY); > > + sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, > > + sensor->data_lanes, > > + sensor->ssdb.lanes); > > + sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, > > + sensor->local_ref); > > + > > + if (cfg->nr_link_freqs > 0) > > + sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN( > > + sensor->prop_names.link_frequencies, > > + cfg->link_freqs, > > + cfg->nr_link_freqs); > > + > > + sensor->cio2_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, > > + sensor->data_lanes, > > + sensor->ssdb.lanes); > > + sensor->cio2_properties[1] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, > > + sensor->remote_ref); > > +} > > + > > +static void cio2_bridge_init_swnode_names(struct cio2_sensor *sensor) > > +{ > > + snprintf(sensor->node_names.remote_port, sizeof(sensor->node_names.remote_port), > > + FWNODE_GRAPH_PORT_NAME_FORMAT, sensor->ssdb.link); > > + snprintf(sensor->node_names.port, sizeof(sensor->node_names.port), > > + FWNODE_GRAPH_PORT_NAME_FORMAT, 0); /* Always port 0 */ > > + snprintf(sensor->node_names.endpoint, sizeof(sensor->node_names.endpoint), > > + FWNODE_GRAPH_ENDPOINT_NAME_FORMAT, 0); /* And endpoint 0 */ Please wrap before 80, there's no need here to do otherwise. You could argue about cio2_bridge_create_fwnode_properties() though. I might just wrap that, too. Applies to the rest of the patch. > > +} > > + > > +static void cio2_bridge_create_connection_swnodes(struct cio2_bridge *bridge, > > + struct cio2_sensor *sensor) > > +{ > > + struct software_node *nodes = sensor->swnodes; > > + > > + cio2_bridge_init_swnode_names(sensor); > > + > > + nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name, > > + sensor->dev_properties); > > + nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port, > > + &nodes[SWNODE_SENSOR_HID]); > > + nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, > > + &nodes[SWNODE_SENSOR_PORT], > > + sensor->ep_properties); > > + nodes[SWNODE_CIO2_PORT] = NODE_PORT(sensor->node_names.remote_port, > > + &bridge->cio2_hid_node); > > + nodes[SWNODE_CIO2_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, > > + &nodes[SWNODE_CIO2_PORT], > > + sensor->cio2_properties); > > +} > > + > > +static void cio2_bridge_unregister_sensors(struct cio2_bridge *bridge) > > +{ > > + struct cio2_sensor *sensor; > > + unsigned int i; > > + > > + for (i = 0; i < bridge->n_sensors; i++) { > > + sensor = &bridge->sensors[i]; > > + software_node_unregister_nodes(sensor->swnodes); > > + acpi_dev_put(sensor->adev); > > + } > > +} > > + > > +static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge, > > + struct pci_dev *cio2) > > +{ > > + struct fwnode_handle *fwnode; > > + struct cio2_sensor *sensor; > > + struct acpi_device *adev; > > + unsigned int i; > > + int ret = 0; > > You may drop this assignment and... > > > + for (i = 0; i < ARRAY_SIZE(cio2_supported_sensors); i++) { > > + const struct cio2_sensor_config *cfg = &cio2_supported_sensors[i]; You could move the inner loop into a new function called e.g. cio2_bridge_connect_sensor. > > + > > + for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) { > > + if (bridge->n_sensors >= CIO2_NUM_PORTS) { > > + dev_err(&cio2->dev, "Exceeded available CIO2 ports\n"); > > + cio2_bridge_unregister_sensors(bridge); > > + ret = -EINVAL; > > + goto err_out; > > + } > > + > > + if (!adev->status.enabled) > > + continue; > > + > > + sensor = &bridge->sensors[bridge->n_sensors]; > > + sensor->adev = adev; > > + strscpy(sensor->name, cfg->hid, sizeof(sensor->name)); > > + > > + ret = cio2_bridge_read_acpi_buffer(adev, "SSDB", > > + &sensor->ssdb, > > + sizeof(sensor->ssdb)); > > + if (ret) > > + goto err_put_adev; > > + > > + if (sensor->ssdb.lanes > 4) { > > CIO2_MAX_LANES > > > + dev_err(&adev->dev, > > + "Number of lanes in SSDB is invalid\n"); > > + ret = -EINVAL; > > + goto err_put_adev; > > + } > > + > > + cio2_bridge_create_fwnode_properties(sensor, cfg); > > + cio2_bridge_create_connection_swnodes(bridge, sensor); > > + > > + ret = software_node_register_nodes(sensor->swnodes); > > + if (ret) > > + goto err_put_adev; > > + > > + fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_SENSOR_HID]); > > + if (!fwnode) { > > + ret = -ENODEV; > > + goto err_free_swnodes; > > + } > > + > > + adev->fwnode.secondary = fwnode; > > + > > + dev_info(&cio2->dev, "Found supported sensor %s\n", > > + acpi_dev_name(adev)); > > + > > + bridge->n_sensors++; > > + } > > + } > > > + return ret; > > ...use here > > return 0; > > directly. > > > +err_free_swnodes: > > + software_node_unregister_nodes(sensor->swnodes); > > +err_put_adev: > > + acpi_dev_put(sensor->adev); > > +err_out: > > + return ret; > > +} > > + > > +int cio2_bridge_init(struct pci_dev *cio2) > > +{ > > + struct device *dev = &cio2->dev; > > + struct fwnode_handle *fwnode; > > + struct cio2_bridge *bridge; > > + int ret; > > + > > + bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); > > + if (!bridge) > > + return -ENOMEM; > > + > > + strscpy(bridge->cio2_node_name, CIO2_HID, sizeof(bridge->cio2_node_name)); > > + bridge->cio2_hid_node.name = bridge->cio2_node_name; > > + > > + ret = software_node_register(&bridge->cio2_hid_node); > > + if (ret < 0) { > > + dev_err(dev, "Failed to register the CIO2 HID node\n"); > > + goto err_free_bridge; > > + } > > + > > + ret = cio2_bridge_connect_sensors(bridge, cio2); > > + if (ret || bridge->n_sensors == 0) > > + goto err_unregister_cio2; > > + > > + dev_info(dev, "Connected %d cameras\n", bridge->n_sensors); > > + > > + fwnode = software_node_fwnode(&bridge->cio2_hid_node); > > + if (!fwnode) { > > + dev_err(dev, "Error getting fwnode from cio2 software_node\n"); > > + ret = -ENODEV; > > + goto err_unregister_sensors; > > + } > > + > > + set_secondary_fwnode(dev, fwnode); > > + > > + return 0; > > + > > +err_unregister_sensors: > > + cio2_bridge_unregister_sensors(bridge); > > +err_unregister_cio2: > > + software_node_unregister(&bridge->cio2_hid_node); > > +err_free_bridge: > > + kfree(bridge); > > + > > + return ret; > > +} > > diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.h b/drivers/media/pci/intel/ipu3/cio2-bridge.h > > new file mode 100644 > > index 000000000000..004b608f322f > > --- /dev/null > > +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.h > > @@ -0,0 +1,122 @@ > > +/* SPDX-License-Identifier: GPL-2.0 */ > > +/* Author: Dan Scally <djrscally@gmail.com> */ > > +#ifndef __CIO2_BRIDGE_H > > +#define __CIO2_BRIDGE_H > > + > > +#include <linux/property.h> > > + > > +#define CIO2_HID "INT343E" > > +#define CIO2_NUM_PORTS 4 This is already defined in ipu3-cio2.h. Could you include that instead? > > +#define MAX_NUM_LINK_FREQS 3 > > + > > +#define CIO2_SENSOR_CONFIG(_HID, _NR, ...) \ > > + { \ > > + .hid = _HID, \ > > + .nr_link_freqs = _NR, \ > > + .link_freqs = { __VA_ARGS__ } \ > > + } > > + > > +#define NODE_SENSOR(_HID, _PROPS) \ > > + ((const struct software_node) { \ > > + .name = _HID, \ > > + .properties = _PROPS, \ > > + }) > > + > > +#define NODE_PORT(_PORT, _SENSOR_NODE) \ > > + ((const struct software_node) { \ > > + _PORT, \ > > + _SENSOR_NODE, \ Could you use explicit assignments to fields here, please? > > + }) > > + > > +#define NODE_ENDPOINT(_EP, _PORT, _PROPS) \ > > + ((const struct software_node) { \ > > + _EP, \ > > + _PORT, \ > > + _PROPS, \ Ditto. > > + }) > > + > > +enum cio2_sensor_swnodes { > > + SWNODE_SENSOR_HID, > > + SWNODE_SENSOR_PORT, > > + SWNODE_SENSOR_ENDPOINT, > > + SWNODE_CIO2_PORT, > > + SWNODE_CIO2_ENDPOINT, > > > + SWNODE_COUNT, > > No comma? > > > +}; > > + > > +/* Data representation as it is in ACPI SSDB buffer */ > > +struct cio2_sensor_ssdb { > > + u8 version; > > + u8 sku; > > + u8 guid_csi2[16]; > > + u8 devfunction; > > + u8 bus; > > + u32 dphylinkenfuses; > > + u32 clockdiv; > > + u8 link; > > + u8 lanes; > > + u32 csiparams[10]; > > + u32 maxlanespeed; > > + u8 sensorcalibfileidx; > > + u8 sensorcalibfileidxInMBZ[3]; > > + u8 romtype; > > + u8 vcmtype; > > + u8 platforminfo; > > + u8 platformsubinfo; > > + u8 flash; > > + u8 privacyled; > > + u8 degree; > > + u8 mipilinkdefined; > > + u32 mclkspeed; > > + u8 controllogicid; > > + u8 reserved1[3]; > > + u8 mclkport; > > + u8 reserved2[13]; > > +} __packed; > > + > > +struct cio2_property_names { > > + char clock_frequency[16]; > > + char rotation[9]; > > + char bus_type[9]; > > + char data_lanes[11]; > > + char remote_endpoint[16]; > > + char link_frequencies[17]; > > +}; > > + > > +struct cio2_node_names { > > + char port[7]; > > + char endpoint[11]; > > + char remote_port[7]; > > +}; > > + > > +struct cio2_sensor_config { > > + const char *hid; > > + const u8 nr_link_freqs; > > + const u64 link_freqs[MAX_NUM_LINK_FREQS]; > > +}; > > + > > +struct cio2_sensor { > > + char name[ACPI_ID_LEN]; > > + struct acpi_device *adev; > > + > > + struct software_node swnodes[6]; > > + struct cio2_node_names node_names; > > + > > + u32 data_lanes[4]; > > + struct cio2_sensor_ssdb ssdb; > > + struct cio2_property_names prop_names; > > + struct property_entry ep_properties[5]; > > + struct property_entry dev_properties[3]; > > + struct property_entry cio2_properties[3]; > > + struct software_node_ref_args local_ref[1]; > > + struct software_node_ref_args remote_ref[1]; > > +}; > > + > > +struct cio2_bridge { > > + char cio2_node_name[ACPI_ID_LEN]; > > + struct software_node cio2_hid_node; > > + unsigned int n_sensors; > > + struct cio2_sensor sensors[CIO2_NUM_PORTS]; > > +}; > > + > > +#endif > > diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c > > index 36e354ecf71e..68ff28abc6a3 100644 > > --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c > > +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c > > @@ -1702,11 +1702,28 @@ static void cio2_queues_exit(struct cio2_device *cio2) > > cio2_queue_exit(cio2, &cio2->queue[i]); > > } > > > > +static bool cio2_check_fwnode_graph(struct fwnode_handle *fwnode) > > +{ > > + struct fwnode_handle *endpoint; > > + > > + if (IS_ERR_OR_NULL(fwnode)) > > + return false; > > + > > + endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); > > + if (endpoint) { > > + fwnode_handle_put(endpoint); > > + return true; > > + } > > + > > + return cio2_check_fwnode_graph(fwnode->secondary); > > +} > > + > > /**************** PCI interface ****************/ > > > > static int cio2_pci_probe(struct pci_dev *pci_dev, > > const struct pci_device_id *id) > > { > > + struct fwnode_handle *fwnode = dev_fwnode(&pci_dev->dev); > > struct cio2_device *cio2; > > int r; > > > > @@ -1715,6 +1732,23 @@ static int cio2_pci_probe(struct pci_dev *pci_dev, > > return -ENOMEM; > > cio2->pci_dev = pci_dev; > > > > + /* > > + * On some platforms no connections to sensors are defined in firmware, > > + * if the device has no endpoints then we can try to build those as > > + * software_nodes parsed from SSDB. > > + */ > > + if (!cio2_check_fwnode_graph(fwnode)) { > > + if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) { > > > + dev_err(&pci_dev->dev, > > + "fwnode graph has no endpoints connected\n"); > > One line? Hmm. That'll be over 80 anyway, but now it's less so.
Hi Sakari, thanks for comments On 28/12/2020 17:05, Sakari Ailus wrote: > Hi Andy, Daniel, > > On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: >>> +static void cio2_bridge_init_swnode_names(struct cio2_sensor *sensor) >>> +{ >>> + snprintf(sensor->node_names.remote_port, sizeof(sensor->node_names.remote_port), >>> + FWNODE_GRAPH_PORT_NAME_FORMAT, sensor->ssdb.link); >>> + snprintf(sensor->node_names.port, sizeof(sensor->node_names.port), >>> + FWNODE_GRAPH_PORT_NAME_FORMAT, 0); /* Always port 0 */ >>> + snprintf(sensor->node_names.endpoint, sizeof(sensor->node_names.endpoint), >>> + FWNODE_GRAPH_ENDPOINT_NAME_FORMAT, 0); /* And endpoint 0 */ > > Please wrap before 80, there's no need here to do otherwise. You could > argue about cio2_bridge_create_fwnode_properties() though. I might just > wrap that, too. > > Applies to the rest of the patch. I shall wrap such cases then - I thought I read somewhere that the wrapped line needed to be shorter than the parent which is why I wrapped after 80...but I can't find the reference now so possibly I imagined that. >>> +static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge, >>> + struct pci_dev *cio2) >>> +{ >>> + struct fwnode_handle *fwnode; >>> + struct cio2_sensor *sensor; >>> + struct acpi_device *adev; >>> + unsigned int i; >>> + int ret = 0; >> >> You may drop this assignment and... >> >>> + for (i = 0; i < ARRAY_SIZE(cio2_supported_sensors); i++) { >>> + const struct cio2_sensor_config *cfg = &cio2_supported_sensors[i]; > > You could move the inner loop into a new function called e.g. > cio2_bridge_connect_sensor. Yeah good idea, I'll do that. >>> diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.h b/drivers/media/pci/intel/ipu3/cio2-bridge.h >>> new file mode 100644 >>> index 000000000000..004b608f322f >>> --- /dev/null >>> +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.h >>> @@ -0,0 +1,122 @@ >>> +/* SPDX-License-Identifier: GPL-2.0 */ >>> +/* Author: Dan Scally <djrscally@gmail.com> */ >>> +#ifndef __CIO2_BRIDGE_H >>> +#define __CIO2_BRIDGE_H >>> + >>> +#include <linux/property.h> >>> + >>> +#define CIO2_HID "INT343E" >>> +#define CIO2_NUM_PORTS 4 > > This is already defined in ipu3-cio2.h. Could you include that instead? Yes; but I'd need to also include media/v4l2-device.h and media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the moment). It didn't seem worth it; but I can move those two includes from the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h Which do you prefer? >>> +#define MAX_NUM_LINK_FREQS 3 >>> + >>> +#define CIO2_SENSOR_CONFIG(_HID, _NR, ...) \ >>> + { \ >>> + .hid = _HID, \ >>> + .nr_link_freqs = _NR, \ >>> + .link_freqs = { __VA_ARGS__ } \ >>> + } >>> + >>> +#define NODE_SENSOR(_HID, _PROPS) \ >>> + ((const struct software_node) { \ >>> + .name = _HID, \ >>> + .properties = _PROPS, \ >>> + }) >>> + >>> +#define NODE_PORT(_PORT, _SENSOR_NODE) \ >>> + ((const struct software_node) { \ >>> + _PORT, \ >>> + _SENSOR_NODE, \ > > Could you use explicit assignments to fields here, please? > >>> + }) >>> + >>> +#define NODE_ENDPOINT(_EP, _PORT, _PROPS) \ >>> + ((const struct software_node) { \ >>> + _EP, \ >>> + _PORT, \ >>> + _PROPS, \ > > Ditto. > Will do
On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > On 28/12/2020 17:05, Sakari Ailus wrote: > > On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: ... > >>> +#include <linux/property.h> > >>> + > >>> +#define CIO2_HID "INT343E" > >>> +#define CIO2_NUM_PORTS 4 > > > > This is already defined in ipu3-cio2.h. Could you include that instead? > > Yes; but I'd need to also include media/v4l2-device.h and > media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > moment). It didn't seem worth it; but I can move those two includes from > the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > > Which do you prefer? Actually ipu3-cio2.h misses a lot of inclusions (like mutex.h which I immediately noticed when scrolled over data types). I think here should be a compromise variant, split out something like ipu3-cio2-defs.h which can be included in both ipu3-cio2.h and cio2-bridge.h. And cio2-bridge.h needs more inclusions like types.h.
On Tue, Dec 29, 2020 at 12:55:45AM +0200, Andy Shevchenko wrote: > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > > On 28/12/2020 17:05, Sakari Ailus wrote: > > > On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: > > ... > > > >>> +#include <linux/property.h> > > >>> + > > >>> +#define CIO2_HID "INT343E" > > >>> +#define CIO2_NUM_PORTS 4 > > > > > > This is already defined in ipu3-cio2.h. Could you include that instead? > > > > Yes; but I'd need to also include media/v4l2-device.h and > > media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > > moment). It didn't seem worth it; but I can move those two includes from > > the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > > > > Which do you prefer? > > Actually ipu3-cio2.h misses a lot of inclusions (like mutex.h which I > immediately noticed when scrolled over data types). I think here should be a > compromise variant, split out something like ipu3-cio2-defs.h which can be Seems like cio2-defs.h more plausible name. > included in both ipu3-cio2.h and cio2-bridge.h. > > And cio2-bridge.h needs more inclusions like types.h.
On Tue, Dec 29, 2020 at 12:55:44AM +0200, Andy Shevchenko wrote: > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > > On 28/12/2020 17:05, Sakari Ailus wrote: > > > On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: > > ... > > > >>> +#include <linux/property.h> > > >>> + > > >>> +#define CIO2_HID "INT343E" > > >>> +#define CIO2_NUM_PORTS 4 > > > > > > This is already defined in ipu3-cio2.h. Could you include that instead? > > > > Yes; but I'd need to also include media/v4l2-device.h and > > media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > > moment). It didn't seem worth it; but I can move those two includes from > > the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > > > > Which do you prefer? > > Actually ipu3-cio2.h misses a lot of inclusions (like mutex.h which I > immediately noticed when scrolled over data types). Then ipu3-cio2.h should be fixed :-) > I think here should be a compromise variant, split out something like > ipu3-cio2-defs.h which can be included in both ipu3-cio2.h and > cio2-bridge.h. > > And cio2-bridge.h needs more inclusions like types.h.
Hi Andy On 28/12/2020 22:55, Andy Shevchenko wrote: > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: >> On 28/12/2020 17:05, Sakari Ailus wrote: >>> On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: > ... > >>>>> +#include <linux/property.h> >>>>> + >>>>> +#define CIO2_HID "INT343E" >>>>> +#define CIO2_NUM_PORTS 4 >>> This is already defined in ipu3-cio2.h. Could you include that instead? >> Yes; but I'd need to also include media/v4l2-device.h and >> media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the >> moment). It didn't seem worth it; but I can move those two includes from >> the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h >> >> Which do you prefer? > Actually ipu3-cio2.h misses a lot of inclusions (like mutex.h which I > immediately noticed when scrolled over data types). I think here should be a > compromise variant, split out something like ipu3-cio2-defs.h which can be > included in both ipu3-cio2.h and cio2-bridge.h. And just including all the things that need to be in both files you mean? > > And cio2-bridge.h needs more inclusions like types.h. Added this in there too
On Tue, Dec 29, 2020 at 1:30 AM Daniel Scally <djrscally@gmail.com> wrote: > > Hi Andy > > On 28/12/2020 22:55, Andy Shevchenko wrote: > > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > >> On 28/12/2020 17:05, Sakari Ailus wrote: > >>> On Thu, Dec 24, 2020 at 02:54:44PM +0200, Andy Shevchenko wrote: > > ... > > > >>>>> +#include <linux/property.h> > >>>>> + > >>>>> +#define CIO2_HID "INT343E" > >>>>> +#define CIO2_NUM_PORTS 4 > >>> This is already defined in ipu3-cio2.h. Could you include that instead? > >> Yes; but I'd need to also include media/v4l2-device.h and > >> media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > >> moment). It didn't seem worth it; but I can move those two includes from > >> the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > >> > >> Which do you prefer? > > I think here should be a > > compromise variant, split out something like ipu3-cio2-defs.h which can be > > included in both ipu3-cio2.h and cio2-bridge.h. > > And just including all the things that need to be in both files you mean? Something which may be logically grouped together. It may include something which cio2-bridge doesn't need, but at least it will be in one place (for example, if you move one CIO2_PCI_* constant, that means you better move all, or so, the rest CIO2_PCI_* constants as well).
On Tue, Dec 29, 2020 at 1:08 AM Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote: > > On Tue, Dec 29, 2020 at 12:55:44AM +0200, Andy Shevchenko wrote: > > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > > > On 28/12/2020 17:05, Sakari Ailus wrote: ... > > > Which do you prefer? > > > > Actually ipu3-cio2.h misses a lot of inclusions (like mutex.h which I > > immediately noticed when scrolled over data types). > > Then ipu3-cio2.h should be fixed :-) Below is a draft patch (it is possible mangled, due to Gmail). Can you look at it and tell me what you think? I believe some headers can be removed, but I have no idea about header inclusion guarantees that v4l2 provides. From 10fa6c7ff66ded35a246677ffe20c677e8453f5b3 Mon Sep 17 00:00:00 2001 From: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Date: Tue, 29 Dec 2020 01:42:03 +0200 Subject: [PATCH 1/1] media: ipu3-cio2: Add headers that ipu3-cio2.h is direct user of Add headers that ipu3-cio2.h is direct user of. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> --- drivers/media/pci/intel/ipu3/ipu3-cio2.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h b/drivers/media/pci/intel/ipu3/ipu3-cio2.h index ccf0b85ae36f..9ea154c50ba1 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h @@ -4,8 +4,25 @@ #ifndef __IPU3_CIO2_H #define __IPU3_CIO2_H +#include <linux/bits.h> +#include <linux/dma-mapping.h> +#include <linux/kernel.h> +#include <linux/mutex.h> #include <linux/types.h> +#include <asm/page.h> + +#include <linux/videodev2.h> + +#include <media/media-device.h> +#include <media/media-entity.h> +#include <media/v4l2-async.h> +#include <media/v4l2-dev.h> +#include <media/v4l2-device.h> +#include <media/v4l2-subdev.h> +#include <media/videobuf2-core.h> +#include <media/videobuf2-v4l2.h> + #define CIO2_NAME "ipu3-cio2" #define CIO2_DEVICE_NAME "Intel IPU3 CIO2" #define CIO2_ENTITY_NAME "ipu3-csi2" @@ -325,6 +342,8 @@ struct csi2_bus_info { u32 lanes; }; +struct cio2_fbpt_entry; + struct cio2_queue { /* mutex to be used by vb2_queue */ struct mutex lock; @@ -355,6 +374,8 @@ struct cio2_queue { atomic_t bufs_queued; }; +struct pci_dev; + struct cio2_device { struct pci_dev *pci_dev; void __iomem *base;
Hi Andy, On Tue, Dec 29, 2020 at 01:54:59AM +0200, Andy Shevchenko wrote: > On Tue, Dec 29, 2020 at 1:08 AM Laurent Pinchart wrote: > > > > On Tue, Dec 29, 2020 at 12:55:44AM +0200, Andy Shevchenko wrote: > > > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > > > > On 28/12/2020 17:05, Sakari Ailus wrote: > > ... > > > > > Which do you prefer? > > > > > > Actually ipu3-cio2.h misses a lot of inclusions (like mutex.h which I > > > immediately noticed when scrolled over data types). > > > > Then ipu3-cio2.h should be fixed :-) > > Below is a draft patch (it is possible mangled, due to Gmail). Can you > look at it and tell me what you think? Thank you for the patch. > I believe some headers can be removed, but I have no idea about header > inclusion guarantees that v4l2 provides. > > From 10fa6c7ff66ded35a246677ffe20c677e8453f5b3 Mon Sep 17 00:00:00 2001 > From: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > Date: Tue, 29 Dec 2020 01:42:03 +0200 > Subject: [PATCH 1/1] media: ipu3-cio2: Add headers that ipu3-cio2.h is direct > user of > > Add headers that ipu3-cio2.h is direct user of. > > Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> > --- > drivers/media/pci/intel/ipu3/ipu3-cio2.h | 21 +++++++++++++++++++++ > 1 file changed, 21 insertions(+) > > diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h > b/drivers/media/pci/intel/ipu3/ipu3-cio2.h > index ccf0b85ae36f..9ea154c50ba1 100644 > --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h > +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h > @@ -4,8 +4,25 @@ > #ifndef __IPU3_CIO2_H > #define __IPU3_CIO2_H > > +#include <linux/bits.h> > +#include <linux/dma-mapping.h> > +#include <linux/kernel.h> > +#include <linux/mutex.h> > #include <linux/types.h> > > +#include <asm/page.h> > + > +#include <linux/videodev2.h> I think this can be dropped. > + > +#include <media/media-device.h> > +#include <media/media-entity.h> > +#include <media/v4l2-async.h> > +#include <media/v4l2-dev.h> > +#include <media/v4l2-device.h> > +#include <media/v4l2-subdev.h> > +#include <media/videobuf2-core.h> > +#include <media/videobuf2-v4l2.h> > + > #define CIO2_NAME "ipu3-cio2" > #define CIO2_DEVICE_NAME "Intel IPU3 CIO2" > #define CIO2_ENTITY_NAME "ipu3-csi2" > @@ -325,6 +342,8 @@ struct csi2_bus_info { > u32 lanes; > }; > > +struct cio2_fbpt_entry; > + > struct cio2_queue { > /* mutex to be used by vb2_queue */ > struct mutex lock; > @@ -355,6 +374,8 @@ struct cio2_queue { > atomic_t bufs_queued; > }; > > +struct pci_dev; > + How about grouping all forward declarations at the top ? Otherwise this looks good, Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> If I was maintaining this driver I would likely move the structure definitions to ipu3-cio2.c though. > struct cio2_device { > struct pci_dev *pci_dev; > void __iomem *base;
On Tue, Dec 29, 2020 at 2:07 AM Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote: > On Tue, Dec 29, 2020 at 01:54:59AM +0200, Andy Shevchenko wrote: > > On Tue, Dec 29, 2020 at 1:08 AM Laurent Pinchart wrote: ... > > +#include <linux/videodev2.h> > > I think this can be dropped. I dropped above (I noticed it's included by a half of the headers listed below. > > +#include <media/media-device.h> > > +#include <media/media-entity.h> > > +#include <media/v4l2-async.h> > > +#include <media/v4l2-dev.h> > > +#include <media/v4l2-device.h> > > +#include <media/v4l2-subdev.h> > > +#include <media/videobuf2-core.h> > > +#include <media/videobuf2-v4l2.h> ... > How about grouping all forward declarations at the top ? Done. > Otherwise this looks good, > > Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Thanks! I just sent a formal patch with your tag included.
Hi Daniel, On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > >>> +#define CIO2_NUM_PORTS 4 > > > > This is already defined in ipu3-cio2.h. Could you include that instead? > > Yes; but I'd need to also include media/v4l2-device.h and > media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > moment). It didn't seem worth it; but I can move those two includes from > the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > > Which do you prefer? Seems you got answers already... :-) splitting the header in two seems good to me. But IMO it doesn't have to be a part of this set.
Hi Sakari On 02/01/2021 17:07, Sakari Ailus wrote: > Hi Daniel, > > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: >>>>> +#define CIO2_NUM_PORTS 4 >>> This is already defined in ipu3-cio2.h. Could you include that instead? >> Yes; but I'd need to also include media/v4l2-device.h and >> media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the >> moment). It didn't seem worth it; but I can move those two includes from >> the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h >> >> Which do you prefer? > Seems you got answers already... :-) splitting the header in two seems good > to me. But IMO it doesn't have to be a part of this set. > Yeah I've been hesitating over this; if we chose not to do it in this set though, how would you want me to deal with the double definition of CIO2_NUM_PORTS
On Sat, Jan 02, 2021 at 05:12:47PM +0000, Daniel Scally wrote: > Hi Sakari > > On 02/01/2021 17:07, Sakari Ailus wrote: > > Hi Daniel, > > > > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > >>>>> +#define CIO2_NUM_PORTS 4 > >>> This is already defined in ipu3-cio2.h. Could you include that instead? > >> Yes; but I'd need to also include media/v4l2-device.h and > >> media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > >> moment). It didn't seem worth it; but I can move those two includes from > >> the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > >> > >> Which do you prefer? > > Seems you got answers already... :-) splitting the header in two seems good > > to me. But IMO it doesn't have to be a part of this set. > > > Yeah I've been hesitating over this; if we chose not to do it in this > set though, how would you want me to deal with the double definition of > CIO2_NUM_PORTS How about prepending Andy's patch to the set and including the header?
On Sat, Jan 02, 2021 at 05:12:47PM +0000, Daniel Scally wrote: > Hi Sakari > > On 02/01/2021 17:07, Sakari Ailus wrote: > > Hi Daniel, > > > > On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: > >>>>> +#define CIO2_NUM_PORTS 4 > >>> This is already defined in ipu3-cio2.h. Could you include that instead? > >> Yes; but I'd need to also include media/v4l2-device.h and > >> media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the > >> moment). It didn't seem worth it; but I can move those two includes from > >> the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h > >> > >> Which do you prefer? > > Seems you got answers already... :-) splitting the header in two seems good > > to me. But IMO it doesn't have to be a part of this set. > > > Yeah I've been hesitating over this; if we chose not to do it in this > set though, how would you want me to deal with the double definition of > CIO2_NUM_PORTS The patch is here: <URL:https://patchwork.linuxtv.org/project/linux-media/patch/20201230204405.62892-1-andriy.shevchenko@linux.intel.com/> I guess Andy forgot to cc you.
Hi Sakari On 02/01/2021 17:24, Sakari Ailus wrote: > On Sat, Jan 02, 2021 at 05:12:47PM +0000, Daniel Scally wrote: >> Hi Sakari >> >> On 02/01/2021 17:07, Sakari Ailus wrote: >>> Hi Daniel, >>> >>> On Mon, Dec 28, 2020 at 10:37:38PM +0000, Daniel Scally wrote: >>>>>>> +#define CIO2_NUM_PORTS 4 >>>>> This is already defined in ipu3-cio2.h. Could you include that instead? >>>> Yes; but I'd need to also include media/v4l2-device.h and >>>> media/videobuf2-dma-sg.h (they're included in ipu3-cio2-main.c at the >>>> moment). It didn't seem worth it; but I can move those two includes from >>>> the .c to the .h and then include ipu3-cio2.h in cio2-bridge.h >>>> >>>> Which do you prefer? >>> Seems you got answers already... :-) splitting the header in two seems good >>> to me. But IMO it doesn't have to be a part of this set. >>> >> Yeah I've been hesitating over this; if we chose not to do it in this >> set though, how would you want me to deal with the double definition of >> CIO2_NUM_PORTS > The patch is here: > > <URL:https://patchwork.linuxtv.org/project/linux-media/patch/20201230204405.62892-1-andriy.shevchenko@linux.intel.com/> > > I guess Andy forgot to cc you. > Ah - thanks, I'd not read back through the list yet. I'll look at this tonight then.
diff --git a/MAINTAINERS b/MAINTAINERS index 16b544624577..e7784b4bc8ea 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -8943,6 +8943,7 @@ INTEL IPU3 CSI-2 CIO2 DRIVER M: Yong Zhi <yong.zhi@intel.com> M: Sakari Ailus <sakari.ailus@linux.intel.com> M: Bingbu Cao <bingbu.cao@intel.com> +M: Dan Scally <djrscally@gmail.com> R: Tianshu Qiu <tian.shu.qiu@intel.com> L: linux-media@vger.kernel.org S: Maintained diff --git a/drivers/media/pci/intel/ipu3/Kconfig b/drivers/media/pci/intel/ipu3/Kconfig index 82d7f17e6a02..dcf5c4b74673 100644 --- a/drivers/media/pci/intel/ipu3/Kconfig +++ b/drivers/media/pci/intel/ipu3/Kconfig @@ -16,3 +16,21 @@ config VIDEO_IPU3_CIO2 Say Y or M here if you have a Skylake/Kaby Lake SoC with MIPI CSI-2 connected camera. The module will be called ipu3-cio2. + +config CIO2_BRIDGE + bool "IPU3 CIO2 Sensors Bridge" + depends on VIDEO_IPU3_CIO2 + help + This extension provides an API for the ipu3-cio2 driver to create + connections to cameras that are hidden in SSDB buffer in ACPI. It + can be used to enable support for cameras in detachable / hybrid + devices that ship with Windows. + + Say Y here if your device is a detachable / hybrid laptop that comes + with Windows installed by the OEM, for example: + + - Microsoft Surface models (except Surface Pro 3) + - The Lenovo Miix line (for example the 510, 520, 710 and 720) + - Dell 7285 + + If in doubt, say N here. diff --git a/drivers/media/pci/intel/ipu3/Makefile b/drivers/media/pci/intel/ipu3/Makefile index 429d516452e4..933777e6ea8a 100644 --- a/drivers/media/pci/intel/ipu3/Makefile +++ b/drivers/media/pci/intel/ipu3/Makefile @@ -2,3 +2,4 @@ obj-$(CONFIG_VIDEO_IPU3_CIO2) += ipu3-cio2.o ipu3-cio2-y += ipu3-cio2-main.o +ipu3-cio2-$(CONFIG_CIO2_BRIDGE) += cio2-bridge.o diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.c b/drivers/media/pci/intel/ipu3/cio2-bridge.c new file mode 100644 index 000000000000..3f4ae172fd25 --- /dev/null +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.c @@ -0,0 +1,272 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Author: Dan Scally <djrscally@gmail.com> */ + +#include <linux/acpi.h> +#include <linux/device.h> +#include <linux/pci.h> +#include <linux/property.h> +#include <media/v4l2-fwnode.h> + +#include "cio2-bridge.h" + +/* + * Extend this array with ACPI Hardware ID's of devices known to be working + * plus the number of link-frequencies expected by their drivers, along with + * the frequency values in hertz. This is somewhat opportunistic way of adding + * support for this for now in the hopes of a better source for the information + * (possibly some encoded value in the SSDB buffer that we're unaware of) + * becoming apparent in the future. + * + * Do not add an entry for a sensor that is not actually supported. + */ +static const struct cio2_sensor_config cio2_supported_sensors[] = { + CIO2_SENSOR_CONFIG("INT33BE", 0), + CIO2_SENSOR_CONFIG("OVTI2680", 0), +}; + +static const struct cio2_property_names prop_names = { + .clock_frequency = "clock-frequency", + .rotation = "rotation", + .bus_type = "bus-type", + .data_lanes = "data-lanes", + .remote_endpoint = "remote-endpoint", + .link_frequencies = "link-frequencies", +}; + +static int cio2_bridge_read_acpi_buffer(struct acpi_device *adev, char *id, + void *data, u32 size) +{ + struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL }; + union acpi_object *obj; + acpi_status status; + int ret = 0; + + status = acpi_evaluate_object(adev->handle, id, NULL, &buffer); + if (ACPI_FAILURE(status)) + return -ENODEV; + + obj = buffer.pointer; + if (!obj) { + dev_err(&adev->dev, "Couldn't locate ACPI buffer\n"); + return -ENODEV; + } + + if (obj->type != ACPI_TYPE_BUFFER) { + dev_err(&adev->dev, "Not an ACPI buffer\n"); + ret = -ENODEV; + goto out_free_buff; + } + + if (obj->buffer.length > size) { + dev_err(&adev->dev, "Given buffer is too small\n"); + ret = -EINVAL; + goto out_free_buff; + } + + memcpy(data, obj->buffer.pointer, obj->buffer.length); + +out_free_buff: + kfree(buffer.pointer); + return ret; +} + +static void cio2_bridge_create_fwnode_properties(struct cio2_sensor *sensor, + const struct cio2_sensor_config *cfg) +{ + unsigned int i; + + sensor->prop_names = prop_names; + + for (i = 0; i < 4; i++) + sensor->data_lanes[i] = i + 1; + + sensor->local_ref[0].node = &sensor->swnodes[SWNODE_CIO2_ENDPOINT]; + sensor->remote_ref[0].node = &sensor->swnodes[SWNODE_SENSOR_ENDPOINT]; + + sensor->dev_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.clock_frequency, + sensor->ssdb.mclkspeed); + sensor->dev_properties[1] = PROPERTY_ENTRY_U8(sensor->prop_names.rotation, + sensor->ssdb.degree); + + sensor->ep_properties[0] = PROPERTY_ENTRY_U32(sensor->prop_names.bus_type, + V4L2_FWNODE_BUS_TYPE_CSI2_DPHY); + sensor->ep_properties[1] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, + sensor->data_lanes, + sensor->ssdb.lanes); + sensor->ep_properties[2] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, + sensor->local_ref); + + if (cfg->nr_link_freqs > 0) + sensor->ep_properties[3] = PROPERTY_ENTRY_U64_ARRAY_LEN( + sensor->prop_names.link_frequencies, + cfg->link_freqs, + cfg->nr_link_freqs); + + sensor->cio2_properties[0] = PROPERTY_ENTRY_U32_ARRAY_LEN(sensor->prop_names.data_lanes, + sensor->data_lanes, + sensor->ssdb.lanes); + sensor->cio2_properties[1] = PROPERTY_ENTRY_REF_ARRAY(sensor->prop_names.remote_endpoint, + sensor->remote_ref); +} + +static void cio2_bridge_init_swnode_names(struct cio2_sensor *sensor) +{ + snprintf(sensor->node_names.remote_port, sizeof(sensor->node_names.remote_port), + FWNODE_GRAPH_PORT_NAME_FORMAT, sensor->ssdb.link); + snprintf(sensor->node_names.port, sizeof(sensor->node_names.port), + FWNODE_GRAPH_PORT_NAME_FORMAT, 0); /* Always port 0 */ + snprintf(sensor->node_names.endpoint, sizeof(sensor->node_names.endpoint), + FWNODE_GRAPH_ENDPOINT_NAME_FORMAT, 0); /* And endpoint 0 */ +} + +static void cio2_bridge_create_connection_swnodes(struct cio2_bridge *bridge, + struct cio2_sensor *sensor) +{ + struct software_node *nodes = sensor->swnodes; + + cio2_bridge_init_swnode_names(sensor); + + nodes[SWNODE_SENSOR_HID] = NODE_SENSOR(sensor->name, + sensor->dev_properties); + nodes[SWNODE_SENSOR_PORT] = NODE_PORT(sensor->node_names.port, + &nodes[SWNODE_SENSOR_HID]); + nodes[SWNODE_SENSOR_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, + &nodes[SWNODE_SENSOR_PORT], + sensor->ep_properties); + nodes[SWNODE_CIO2_PORT] = NODE_PORT(sensor->node_names.remote_port, + &bridge->cio2_hid_node); + nodes[SWNODE_CIO2_ENDPOINT] = NODE_ENDPOINT(sensor->node_names.endpoint, + &nodes[SWNODE_CIO2_PORT], + sensor->cio2_properties); +} + +static void cio2_bridge_unregister_sensors(struct cio2_bridge *bridge) +{ + struct cio2_sensor *sensor; + unsigned int i; + + for (i = 0; i < bridge->n_sensors; i++) { + sensor = &bridge->sensors[i]; + software_node_unregister_nodes(sensor->swnodes); + acpi_dev_put(sensor->adev); + } +} + +static int cio2_bridge_connect_sensors(struct cio2_bridge *bridge, + struct pci_dev *cio2) +{ + struct fwnode_handle *fwnode; + struct cio2_sensor *sensor; + struct acpi_device *adev; + unsigned int i; + int ret = 0; + + for (i = 0; i < ARRAY_SIZE(cio2_supported_sensors); i++) { + const struct cio2_sensor_config *cfg = &cio2_supported_sensors[i]; + + for_each_acpi_dev_match(adev, cfg->hid, NULL, -1) { + if (bridge->n_sensors >= CIO2_NUM_PORTS) { + dev_err(&cio2->dev, "Exceeded available CIO2 ports\n"); + cio2_bridge_unregister_sensors(bridge); + ret = -EINVAL; + goto err_out; + } + + if (!adev->status.enabled) + continue; + + sensor = &bridge->sensors[bridge->n_sensors]; + sensor->adev = adev; + strscpy(sensor->name, cfg->hid, sizeof(sensor->name)); + + ret = cio2_bridge_read_acpi_buffer(adev, "SSDB", + &sensor->ssdb, + sizeof(sensor->ssdb)); + if (ret) + goto err_put_adev; + + if (sensor->ssdb.lanes > 4) { + dev_err(&adev->dev, + "Number of lanes in SSDB is invalid\n"); + ret = -EINVAL; + goto err_put_adev; + } + + cio2_bridge_create_fwnode_properties(sensor, cfg); + cio2_bridge_create_connection_swnodes(bridge, sensor); + + ret = software_node_register_nodes(sensor->swnodes); + if (ret) + goto err_put_adev; + + fwnode = software_node_fwnode(&sensor->swnodes[SWNODE_SENSOR_HID]); + if (!fwnode) { + ret = -ENODEV; + goto err_free_swnodes; + } + + adev->fwnode.secondary = fwnode; + + dev_info(&cio2->dev, "Found supported sensor %s\n", + acpi_dev_name(adev)); + + bridge->n_sensors++; + } + } + + return ret; + +err_free_swnodes: + software_node_unregister_nodes(sensor->swnodes); +err_put_adev: + acpi_dev_put(sensor->adev); +err_out: + return ret; +} + +int cio2_bridge_init(struct pci_dev *cio2) +{ + struct device *dev = &cio2->dev; + struct fwnode_handle *fwnode; + struct cio2_bridge *bridge; + int ret; + + bridge = kzalloc(sizeof(*bridge), GFP_KERNEL); + if (!bridge) + return -ENOMEM; + + strscpy(bridge->cio2_node_name, CIO2_HID, sizeof(bridge->cio2_node_name)); + bridge->cio2_hid_node.name = bridge->cio2_node_name; + + ret = software_node_register(&bridge->cio2_hid_node); + if (ret < 0) { + dev_err(dev, "Failed to register the CIO2 HID node\n"); + goto err_free_bridge; + } + + ret = cio2_bridge_connect_sensors(bridge, cio2); + if (ret || bridge->n_sensors == 0) + goto err_unregister_cio2; + + dev_info(dev, "Connected %d cameras\n", bridge->n_sensors); + + fwnode = software_node_fwnode(&bridge->cio2_hid_node); + if (!fwnode) { + dev_err(dev, "Error getting fwnode from cio2 software_node\n"); + ret = -ENODEV; + goto err_unregister_sensors; + } + + set_secondary_fwnode(dev, fwnode); + + return 0; + +err_unregister_sensors: + cio2_bridge_unregister_sensors(bridge); +err_unregister_cio2: + software_node_unregister(&bridge->cio2_hid_node); +err_free_bridge: + kfree(bridge); + + return ret; +} diff --git a/drivers/media/pci/intel/ipu3/cio2-bridge.h b/drivers/media/pci/intel/ipu3/cio2-bridge.h new file mode 100644 index 000000000000..004b608f322f --- /dev/null +++ b/drivers/media/pci/intel/ipu3/cio2-bridge.h @@ -0,0 +1,122 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* Author: Dan Scally <djrscally@gmail.com> */ +#ifndef __CIO2_BRIDGE_H +#define __CIO2_BRIDGE_H + +#include <linux/property.h> + +#define CIO2_HID "INT343E" +#define CIO2_NUM_PORTS 4 +#define MAX_NUM_LINK_FREQS 3 + +#define CIO2_SENSOR_CONFIG(_HID, _NR, ...) \ + { \ + .hid = _HID, \ + .nr_link_freqs = _NR, \ + .link_freqs = { __VA_ARGS__ } \ + } + +#define NODE_SENSOR(_HID, _PROPS) \ + ((const struct software_node) { \ + .name = _HID, \ + .properties = _PROPS, \ + }) + +#define NODE_PORT(_PORT, _SENSOR_NODE) \ + ((const struct software_node) { \ + _PORT, \ + _SENSOR_NODE, \ + }) + +#define NODE_ENDPOINT(_EP, _PORT, _PROPS) \ + ((const struct software_node) { \ + _EP, \ + _PORT, \ + _PROPS, \ + }) + +enum cio2_sensor_swnodes { + SWNODE_SENSOR_HID, + SWNODE_SENSOR_PORT, + SWNODE_SENSOR_ENDPOINT, + SWNODE_CIO2_PORT, + SWNODE_CIO2_ENDPOINT, + SWNODE_COUNT, +}; + +/* Data representation as it is in ACPI SSDB buffer */ +struct cio2_sensor_ssdb { + u8 version; + u8 sku; + u8 guid_csi2[16]; + u8 devfunction; + u8 bus; + u32 dphylinkenfuses; + u32 clockdiv; + u8 link; + u8 lanes; + u32 csiparams[10]; + u32 maxlanespeed; + u8 sensorcalibfileidx; + u8 sensorcalibfileidxInMBZ[3]; + u8 romtype; + u8 vcmtype; + u8 platforminfo; + u8 platformsubinfo; + u8 flash; + u8 privacyled; + u8 degree; + u8 mipilinkdefined; + u32 mclkspeed; + u8 controllogicid; + u8 reserved1[3]; + u8 mclkport; + u8 reserved2[13]; +} __packed; + +struct cio2_property_names { + char clock_frequency[16]; + char rotation[9]; + char bus_type[9]; + char data_lanes[11]; + char remote_endpoint[16]; + char link_frequencies[17]; +}; + +struct cio2_node_names { + char port[7]; + char endpoint[11]; + char remote_port[7]; +}; + +struct cio2_sensor_config { + const char *hid; + const u8 nr_link_freqs; + const u64 link_freqs[MAX_NUM_LINK_FREQS]; +}; + +struct cio2_sensor { + char name[ACPI_ID_LEN]; + struct acpi_device *adev; + + struct software_node swnodes[6]; + struct cio2_node_names node_names; + + u32 data_lanes[4]; + struct cio2_sensor_ssdb ssdb; + struct cio2_property_names prop_names; + struct property_entry ep_properties[5]; + struct property_entry dev_properties[3]; + struct property_entry cio2_properties[3]; + struct software_node_ref_args local_ref[1]; + struct software_node_ref_args remote_ref[1]; +}; + +struct cio2_bridge { + char cio2_node_name[ACPI_ID_LEN]; + struct software_node cio2_hid_node; + unsigned int n_sensors; + struct cio2_sensor sensors[CIO2_NUM_PORTS]; +}; + +#endif diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c index 36e354ecf71e..68ff28abc6a3 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2-main.c @@ -1702,11 +1702,28 @@ static void cio2_queues_exit(struct cio2_device *cio2) cio2_queue_exit(cio2, &cio2->queue[i]); } +static bool cio2_check_fwnode_graph(struct fwnode_handle *fwnode) +{ + struct fwnode_handle *endpoint; + + if (IS_ERR_OR_NULL(fwnode)) + return false; + + endpoint = fwnode_graph_get_next_endpoint(fwnode, NULL); + if (endpoint) { + fwnode_handle_put(endpoint); + return true; + } + + return cio2_check_fwnode_graph(fwnode->secondary); +} + /**************** PCI interface ****************/ static int cio2_pci_probe(struct pci_dev *pci_dev, const struct pci_device_id *id) { + struct fwnode_handle *fwnode = dev_fwnode(&pci_dev->dev); struct cio2_device *cio2; int r; @@ -1715,6 +1732,23 @@ static int cio2_pci_probe(struct pci_dev *pci_dev, return -ENOMEM; cio2->pci_dev = pci_dev; + /* + * On some platforms no connections to sensors are defined in firmware, + * if the device has no endpoints then we can try to build those as + * software_nodes parsed from SSDB. + */ + if (!cio2_check_fwnode_graph(fwnode)) { + if (fwnode && !IS_ERR_OR_NULL(fwnode->secondary)) { + dev_err(&pci_dev->dev, + "fwnode graph has no endpoints connected\n"); + return -EINVAL; + } + + r = cio2_bridge_init(pci_dev); + if (r) + return r; + } + r = pcim_enable_device(pci_dev); if (r) { dev_err(&pci_dev->dev, "failed to enable device (%d)\n", r); diff --git a/drivers/media/pci/intel/ipu3/ipu3-cio2.h b/drivers/media/pci/intel/ipu3/ipu3-cio2.h index ccf0b85ae36f..520a27c9cdad 100644 --- a/drivers/media/pci/intel/ipu3/ipu3-cio2.h +++ b/drivers/media/pci/intel/ipu3/ipu3-cio2.h @@ -437,4 +437,10 @@ static inline struct cio2_queue *vb2q_to_cio2_queue(struct vb2_queue *vq) return container_of(vq, struct cio2_queue, vbq); } +#if IS_ENABLED(CONFIG_CIO2_BRIDGE) +int cio2_bridge_init(struct pci_dev *cio2); +#else +int cio2_bridge_init(struct pci_dev *cio2) { return 0; } +#endif + #endif