From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- include/media/v4l2-common.h | 597 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 597 insertions(+) create mode 100644 include/media/v4l2-common.h (limited to 'include/media/v4l2-common.h') diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h new file mode 100644 index 000000000..1bdaea248 --- /dev/null +++ b/include/media/v4l2-common.h @@ -0,0 +1,597 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + v4l2 common internal API header + + This header contains internal shared ioctl definitions for use by the + internal low-level v4l2 drivers. + Each ioctl begins with VIDIOC_INT_ to clearly mark that it is an internal + define, + + Copyright (C) 2005 Hans Verkuil + + */ + +#ifndef V4L2_COMMON_H_ +#define V4L2_COMMON_H_ + +#include +#include + +/* Common printk constructs for v4l-i2c drivers. These macros create a unique + prefix consisting of the driver name, the adapter number and the i2c + address. */ +#define v4l_printk(level, name, adapter, addr, fmt, arg...) \ + printk(level "%s %d-%04x: " fmt, name, i2c_adapter_id(adapter), addr , ## arg) + +#define v4l_client_printk(level, client, fmt, arg...) \ + v4l_printk(level, (client)->dev.driver->name, (client)->adapter, \ + (client)->addr, fmt , ## arg) + +#define v4l_err(client, fmt, arg...) \ + v4l_client_printk(KERN_ERR, client, fmt , ## arg) + +#define v4l_warn(client, fmt, arg...) \ + v4l_client_printk(KERN_WARNING, client, fmt , ## arg) + +#define v4l_info(client, fmt, arg...) \ + v4l_client_printk(KERN_INFO, client, fmt , ## arg) + +/* These three macros assume that the debug level is set with a module + parameter called 'debug'. */ +#define v4l_dbg(level, debug, client, fmt, arg...) \ + do { \ + if (debug >= (level)) \ + v4l_client_printk(KERN_DEBUG, client, fmt , ## arg); \ + } while (0) + +/* Add a version of v4l_dbg to be used on drivers using dev_foo() macros */ +#define dev_dbg_lvl(__dev, __level, __debug, __fmt, __arg...) \ + do { \ + if (__debug >= (__level)) \ + dev_printk(KERN_DEBUG, __dev, __fmt, ##__arg); \ + } while (0) + +/* ------------------------------------------------------------------------- */ + +/* These printk constructs can be used with v4l2_device and v4l2_subdev */ +#define v4l2_printk(level, dev, fmt, arg...) \ + printk(level "%s: " fmt, (dev)->name , ## arg) + +#define v4l2_err(dev, fmt, arg...) \ + v4l2_printk(KERN_ERR, dev, fmt , ## arg) + +#define v4l2_warn(dev, fmt, arg...) \ + v4l2_printk(KERN_WARNING, dev, fmt , ## arg) + +#define v4l2_info(dev, fmt, arg...) \ + v4l2_printk(KERN_INFO, dev, fmt , ## arg) + +/* These three macros assume that the debug level is set with a module + parameter called 'debug'. */ +#define v4l2_dbg(level, debug, dev, fmt, arg...) \ + do { \ + if (debug >= (level)) \ + v4l2_printk(KERN_DEBUG, dev, fmt , ## arg); \ + } while (0) + +/** + * v4l2_ctrl_query_fill- Fill in a struct v4l2_queryctrl + * + * @qctrl: pointer to the &struct v4l2_queryctrl to be filled + * @min: minimum value for the control + * @max: maximum value for the control + * @step: control step + * @def: default value for the control + * + * Fills the &struct v4l2_queryctrl fields for the query control. + * + * .. note:: + * + * This function assumes that the @qctrl->id field is filled. + * + * Returns -EINVAL if the control is not known by the V4L2 core, 0 on success. + */ + +int v4l2_ctrl_query_fill(struct v4l2_queryctrl *qctrl, + s32 min, s32 max, s32 step, s32 def); + +/* ------------------------------------------------------------------------- */ + +struct v4l2_device; +struct v4l2_subdev; +struct v4l2_subdev_ops; + +/* I2C Helper functions */ +#include + +/** + * enum v4l2_i2c_tuner_type - specifies the range of tuner address that + * should be used when seeking for I2C devices. + * + * @ADDRS_RADIO: Radio tuner addresses. + * Represent the following I2C addresses: + * 0x10 (if compiled with tea5761 support) + * and 0x60. + * @ADDRS_DEMOD: Demod tuner addresses. + * Represent the following I2C addresses: + * 0x42, 0x43, 0x4a and 0x4b. + * @ADDRS_TV: TV tuner addresses. + * Represent the following I2C addresses: + * 0x42, 0x43, 0x4a, 0x4b, 0x60, 0x61, 0x62, + * 0x63 and 0x64. + * @ADDRS_TV_WITH_DEMOD: TV tuner addresses if demod is present, this + * excludes addresses used by the demodulator + * from the list of candidates. + * Represent the following I2C addresses: + * 0x60, 0x61, 0x62, 0x63 and 0x64. + * + * NOTE: All I2C addresses above use the 7-bit notation. + */ +enum v4l2_i2c_tuner_type { + ADDRS_RADIO, + ADDRS_DEMOD, + ADDRS_TV, + ADDRS_TV_WITH_DEMOD, +}; + +#if defined(CONFIG_VIDEO_V4L2_I2C) + +/** + * v4l2_i2c_new_subdev - Load an i2c module and return an initialized + * &struct v4l2_subdev. + * + * @v4l2_dev: pointer to &struct v4l2_device + * @adapter: pointer to struct i2c_adapter + * @client_type: name of the chip that's on the adapter. + * @addr: I2C address. If zero, it will use @probe_addrs + * @probe_addrs: array with a list of address. The last entry at such + * array should be %I2C_CLIENT_END. + * + * returns a &struct v4l2_subdev pointer. + */ +struct v4l2_subdev *v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, const char *client_type, + u8 addr, const unsigned short *probe_addrs); + +/** + * v4l2_i2c_new_subdev_board - Load an i2c module and return an initialized + * &struct v4l2_subdev. + * + * @v4l2_dev: pointer to &struct v4l2_device + * @adapter: pointer to struct i2c_adapter + * @info: pointer to struct i2c_board_info used to replace the irq, + * platform_data and addr arguments. + * @probe_addrs: array with a list of address. The last entry at such + * array should be %I2C_CLIENT_END. + * + * returns a &struct v4l2_subdev pointer. + */ +struct v4l2_subdev *v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, struct i2c_board_info *info, + const unsigned short *probe_addrs); + +/** + * v4l2_i2c_subdev_set_name - Set name for an I²C sub-device + * + * @sd: pointer to &struct v4l2_subdev + * @client: pointer to struct i2c_client + * @devname: the name of the device; if NULL, the I²C device drivers's name + * will be used + * @postfix: sub-device specific string to put right after the I²C device name; + * may be NULL + */ +void v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client, + const char *devname, const char *postfix); + +/** + * v4l2_i2c_subdev_init - Initializes a &struct v4l2_subdev with data from + * an i2c_client struct. + * + * @sd: pointer to &struct v4l2_subdev + * @client: pointer to struct i2c_client + * @ops: pointer to &struct v4l2_subdev_ops + */ +void v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, + const struct v4l2_subdev_ops *ops); + +/** + * v4l2_i2c_subdev_addr - returns i2c client address of &struct v4l2_subdev. + * + * @sd: pointer to &struct v4l2_subdev + * + * Returns the address of an I2C sub-device + */ +unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd); + +/** + * v4l2_i2c_tuner_addrs - Return a list of I2C tuner addresses to probe. + * + * @type: type of the tuner to seek, as defined by + * &enum v4l2_i2c_tuner_type. + * + * NOTE: Use only if the tuner addresses are unknown. + */ +const unsigned short *v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type); + +/** + * v4l2_i2c_subdev_unregister - Unregister a v4l2_subdev + * + * @sd: pointer to &struct v4l2_subdev + */ +void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd); + +#else + +static inline struct v4l2_subdev * +v4l2_i2c_new_subdev(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, const char *client_type, + u8 addr, const unsigned short *probe_addrs) +{ + return NULL; +} + +static inline struct v4l2_subdev * +v4l2_i2c_new_subdev_board(struct v4l2_device *v4l2_dev, + struct i2c_adapter *adapter, struct i2c_board_info *info, + const unsigned short *probe_addrs) +{ + return NULL; +} + +static inline void +v4l2_i2c_subdev_set_name(struct v4l2_subdev *sd, struct i2c_client *client, + const char *devname, const char *postfix) +{} + +static inline void +v4l2_i2c_subdev_init(struct v4l2_subdev *sd, struct i2c_client *client, + const struct v4l2_subdev_ops *ops) +{} + +static inline unsigned short v4l2_i2c_subdev_addr(struct v4l2_subdev *sd) +{ + return I2C_CLIENT_END; +} + +static inline const unsigned short * +v4l2_i2c_tuner_addrs(enum v4l2_i2c_tuner_type type) +{ + return NULL; +} + +static inline void v4l2_i2c_subdev_unregister(struct v4l2_subdev *sd) +{} + +#endif + +/* ------------------------------------------------------------------------- */ + +/* SPI Helper functions */ + +#include + +#if defined(CONFIG_SPI) + +/** + * v4l2_spi_new_subdev - Load an spi module and return an initialized + * &struct v4l2_subdev. + * + * + * @v4l2_dev: pointer to &struct v4l2_device. + * @master: pointer to struct spi_master. + * @info: pointer to struct spi_board_info. + * + * returns a &struct v4l2_subdev pointer. + */ +struct v4l2_subdev *v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, + struct spi_master *master, struct spi_board_info *info); + +/** + * v4l2_spi_subdev_init - Initialize a v4l2_subdev with data from an + * spi_device struct. + * + * @sd: pointer to &struct v4l2_subdev + * @spi: pointer to struct spi_device. + * @ops: pointer to &struct v4l2_subdev_ops + */ +void v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, + const struct v4l2_subdev_ops *ops); + +/** + * v4l2_spi_subdev_unregister - Unregister a v4l2_subdev + * + * @sd: pointer to &struct v4l2_subdev + */ +void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd); + +#else + +static inline struct v4l2_subdev * +v4l2_spi_new_subdev(struct v4l2_device *v4l2_dev, + struct spi_master *master, struct spi_board_info *info) +{ + return NULL; +} + +static inline void +v4l2_spi_subdev_init(struct v4l2_subdev *sd, struct spi_device *spi, + const struct v4l2_subdev_ops *ops) +{} + +static inline void v4l2_spi_subdev_unregister(struct v4l2_subdev *sd) +{} +#endif + +/* ------------------------------------------------------------------------- */ + +/* + * FIXME: these remaining ioctls/structs should be removed as well, but they + * are still used in tuner-simple.c (TUNER_SET_CONFIG) and cx18/ivtv (RESET). + * To remove these ioctls some more cleanup is needed in those modules. + * + * It doesn't make much sense on documenting them, as what we really want is + * to get rid of them. + */ + +/* s_config */ +struct v4l2_priv_tun_config { + int tuner; + void *priv; +}; +#define TUNER_SET_CONFIG _IOW('d', 92, struct v4l2_priv_tun_config) + +#define VIDIOC_INT_RESET _IOW ('d', 102, u32) + +/* ------------------------------------------------------------------------- */ + +/* Miscellaneous helper functions */ + +/** + * v4l_bound_align_image - adjust video dimensions according to + * a given constraints. + * + * @width: pointer to width that will be adjusted if needed. + * @wmin: minimum width. + * @wmax: maximum width. + * @walign: least significant bit on width. + * @height: pointer to height that will be adjusted if needed. + * @hmin: minimum height. + * @hmax: maximum height. + * @halign: least significant bit on height. + * @salign: least significant bit for the image size (e. g. + * :math:`width * height`). + * + * Clip an image to have @width between @wmin and @wmax, and @height between + * @hmin and @hmax, inclusive. + * + * Additionally, the @width will be a multiple of :math:`2^{walign}`, + * the @height will be a multiple of :math:`2^{halign}`, and the overall + * size :math:`width * height` will be a multiple of :math:`2^{salign}`. + * + * .. note:: + * + * #. The clipping rectangle may be shrunk or enlarged to fit the alignment + * constraints. + * #. @wmax must not be smaller than @wmin. + * #. @hmax must not be smaller than @hmin. + * #. The alignments must not be so high there are no possible image + * sizes within the allowed bounds. + * #. @wmin and @hmin must be at least 1 (don't use 0). + * #. For @walign, @halign and @salign, if you don't care about a certain + * alignment, specify ``0``, as :math:`2^0 = 1` and one byte alignment + * is equivalent to no alignment. + * #. If you only want to adjust downward, specify a maximum that's the + * same as the initial value. + */ +void v4l_bound_align_image(unsigned int *width, unsigned int wmin, + unsigned int wmax, unsigned int walign, + unsigned int *height, unsigned int hmin, + unsigned int hmax, unsigned int halign, + unsigned int salign); + +/** + * v4l2_find_nearest_size - Find the nearest size among a discrete + * set of resolutions contained in an array of a driver specific struct. + * + * @array: a driver specific array of image sizes + * @array_size: the length of the driver specific array of image sizes + * @width_field: the name of the width field in the driver specific struct + * @height_field: the name of the height field in the driver specific struct + * @width: desired width. + * @height: desired height. + * + * Finds the closest resolution to minimize the width and height differences + * between what requested and the supported resolutions. The size of the width + * and height fields in the driver specific must equal to that of u32, i.e. four + * bytes. + * + * Returns the best match or NULL if the length of the array is zero. + */ +#define v4l2_find_nearest_size(array, array_size, width_field, height_field, \ + width, height) \ + ({ \ + BUILD_BUG_ON(sizeof((array)->width_field) != sizeof(u32) || \ + sizeof((array)->height_field) != sizeof(u32)); \ + (typeof(&(array)[0]))__v4l2_find_nearest_size( \ + (array), array_size, sizeof(*(array)), \ + offsetof(typeof(*(array)), width_field), \ + offsetof(typeof(*(array)), height_field), \ + width, height); \ + }) +const void * +__v4l2_find_nearest_size(const void *array, size_t array_size, + size_t entry_size, size_t width_offset, + size_t height_offset, s32 width, s32 height); + +/** + * v4l2_g_parm_cap - helper routine for vidioc_g_parm to fill this in by + * calling the g_frame_interval op of the given subdev. It only works + * for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the + * function name. + * + * @vdev: the struct video_device pointer. Used to determine the device caps. + * @sd: the sub-device pointer. + * @a: the VIDIOC_G_PARM argument. + */ +int v4l2_g_parm_cap(struct video_device *vdev, + struct v4l2_subdev *sd, struct v4l2_streamparm *a); + +/** + * v4l2_s_parm_cap - helper routine for vidioc_s_parm to fill this in by + * calling the s_frame_interval op of the given subdev. It only works + * for V4L2_BUF_TYPE_VIDEO_CAPTURE(_MPLANE), hence the _cap in the + * function name. + * + * @vdev: the struct video_device pointer. Used to determine the device caps. + * @sd: the sub-device pointer. + * @a: the VIDIOC_S_PARM argument. + */ +int v4l2_s_parm_cap(struct video_device *vdev, + struct v4l2_subdev *sd, struct v4l2_streamparm *a); + +/* Compare two v4l2_fract structs */ +#define V4L2_FRACT_COMPARE(a, OP, b) \ + ((u64)(a).numerator * (b).denominator OP \ + (u64)(b).numerator * (a).denominator) + +/* ------------------------------------------------------------------------- */ + +/* Pixel format and FourCC helpers */ + +/** + * enum v4l2_pixel_encoding - specifies the pixel encoding value + * + * @V4L2_PIXEL_ENC_UNKNOWN: Pixel encoding is unknown/un-initialized + * @V4L2_PIXEL_ENC_YUV: Pixel encoding is YUV + * @V4L2_PIXEL_ENC_RGB: Pixel encoding is RGB + * @V4L2_PIXEL_ENC_BAYER: Pixel encoding is Bayer + */ +enum v4l2_pixel_encoding { + V4L2_PIXEL_ENC_UNKNOWN = 0, + V4L2_PIXEL_ENC_YUV = 1, + V4L2_PIXEL_ENC_RGB = 2, + V4L2_PIXEL_ENC_BAYER = 3, +}; + +/** + * struct v4l2_format_info - information about a V4L2 format + * @format: 4CC format identifier (V4L2_PIX_FMT_*) + * @pixel_enc: Pixel encoding (see enum v4l2_pixel_encoding above) + * @mem_planes: Number of memory planes, which includes the alpha plane (1 to 4). + * @comp_planes: Number of component planes, which includes the alpha plane (1 to 4). + * @bpp: Array of per-plane bytes per pixel + * @hdiv: Horizontal chroma subsampling factor + * @vdiv: Vertical chroma subsampling factor + * @block_w: Per-plane macroblock pixel width (optional) + * @block_h: Per-plane macroblock pixel height (optional) + */ +struct v4l2_format_info { + u32 format; + u8 pixel_enc; + u8 mem_planes; + u8 comp_planes; + u8 bpp[4]; + u8 hdiv; + u8 vdiv; + u8 block_w[4]; + u8 block_h[4]; +}; + +static inline bool v4l2_is_format_rgb(const struct v4l2_format_info *f) +{ + return f && f->pixel_enc == V4L2_PIXEL_ENC_RGB; +} + +static inline bool v4l2_is_format_yuv(const struct v4l2_format_info *f) +{ + return f && f->pixel_enc == V4L2_PIXEL_ENC_YUV; +} + +static inline bool v4l2_is_format_bayer(const struct v4l2_format_info *f) +{ + return f && f->pixel_enc == V4L2_PIXEL_ENC_BAYER; +} + +const struct v4l2_format_info *v4l2_format_info(u32 format); +void v4l2_apply_frmsize_constraints(u32 *width, u32 *height, + const struct v4l2_frmsize_stepwise *frmsize); +int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat, + u32 width, u32 height); +int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat, + u32 width, u32 height); + +/** + * v4l2_get_link_freq - Get link rate from transmitter + * + * @handler: The transmitter's control handler + * @mul: The multiplier between pixel rate and link frequency. Bits per pixel on + * D-PHY, samples per clock on parallel. 0 otherwise. + * @div: The divisor between pixel rate and link frequency. Number of data lanes + * times two on D-PHY, 1 on parallel. 0 otherwise. + * + * This function is intended for obtaining the link frequency from the + * transmitter sub-devices. It returns the link rate, either from the + * V4L2_CID_LINK_FREQ control implemented by the transmitter, or value + * calculated based on the V4L2_CID_PIXEL_RATE implemented by the transmitter. + * + * Returns link frequency on success, otherwise a negative error code: + * -ENOENT: Link frequency or pixel rate control not found + * -EINVAL: Invalid link frequency value + */ +s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul, + unsigned int div); + +void v4l2_simplify_fraction(u32 *numerator, u32 *denominator, + unsigned int n_terms, unsigned int threshold); +u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator); + +static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf) +{ + /* + * When the timestamp comes from 32-bit user space, there may be + * uninitialized data in tv_usec, so cast it to u32. + * Otherwise allow invalid input for backwards compatibility. + */ + return buf->timestamp.tv_sec * NSEC_PER_SEC + + (u32)buf->timestamp.tv_usec * NSEC_PER_USEC; +} + +static inline void v4l2_buffer_set_timestamp(struct v4l2_buffer *buf, + u64 timestamp) +{ + struct timespec64 ts = ns_to_timespec64(timestamp); + + buf->timestamp.tv_sec = ts.tv_sec; + buf->timestamp.tv_usec = ts.tv_nsec / NSEC_PER_USEC; +} + +static inline bool v4l2_is_colorspace_valid(__u32 colorspace) +{ + return colorspace > V4L2_COLORSPACE_DEFAULT && + colorspace < V4L2_COLORSPACE_LAST; +} + +static inline bool v4l2_is_xfer_func_valid(__u32 xfer_func) +{ + return xfer_func > V4L2_XFER_FUNC_DEFAULT && + xfer_func < V4L2_XFER_FUNC_LAST; +} + +static inline bool v4l2_is_ycbcr_enc_valid(__u8 ycbcr_enc) +{ + return ycbcr_enc > V4L2_YCBCR_ENC_DEFAULT && + ycbcr_enc < V4L2_YCBCR_ENC_LAST; +} + +static inline bool v4l2_is_hsv_enc_valid(__u8 hsv_enc) +{ + return hsv_enc == V4L2_HSV_ENC_180 || hsv_enc == V4L2_HSV_ENC_256; +} + +static inline bool v4l2_is_quant_valid(__u8 quantization) +{ + return quantization == V4L2_QUANTIZATION_FULL_RANGE || + quantization == V4L2_QUANTIZATION_LIM_RANGE; +} + +#endif /* V4L2_COMMON_H_ */ -- cgit v1.2.3