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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
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Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-nextgrafted
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(). ...
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+.. SPDX-License-Identifier: GFDL-1.1-no-invariants-or-later
+
+.. planar-yuv:
+
+******************
+Planar YUV formats
+******************
+
+Planar formats split luma and chroma data in separate memory regions. They
+exist in two variants:
+
+- Semi-planar formats use two planes. The first plane is the luma plane and
+ stores the Y components. The second plane is the chroma plane and stores the
+ Cb and Cr components interleaved.
+
+- Fully planar formats use three planes to store the Y, Cb and Cr components
+ separately.
+
+Within a plane, components are stored in pixel order, which may be linear or
+tiled. Padding may be supported at the end of the lines, and the line stride of
+the chroma planes may be constrained by the line stride of the luma plane.
+
+Some planar formats allow planes to be placed in independent memory locations.
+They are identified by an 'M' suffix in their name (such as in
+``V4L2_PIX_FMT_NV12M``). Those formats are intended to be used only in drivers
+and applications that support the multi-planar API, described in
+:ref:`planar-apis`. Unless explicitly documented as supporting non-contiguous
+planes, formats require the planes to follow each other immediately in memory.
+
+
+Semi-Planar YUV Formats
+=======================
+
+These formats are commonly referred to as NV formats (NV12, NV16, ...). They
+use two planes, and store the luma components in the first plane and the chroma
+components in the second plane. The Cb and Cr components are interleaved in the
+chroma plane, with Cb and Cr always stored in pairs. The chroma order is
+exposed as different formats.
+
+For memory contiguous formats, the number of padding pixels at the end of the
+chroma lines is identical to the padding of the luma lines. Without horizontal
+subsampling, the chroma line stride (in bytes) is thus equal to twice the luma
+line stride. With horizontal subsampling by 2, the chroma line stride is equal
+to the luma line stride. Vertical subsampling doesn't affect the line stride.
+
+For non-contiguous formats, no constraints are enforced by the format on the
+relationship between the luma and chroma line padding and stride.
+
+All components are stored with the same number of bits per component.
+
+.. raw:: latex
+
+ \footnotesize
+
+.. tabularcolumns:: |p{5.2cm}|p{1.0cm}|p{1.5cm}|p{1.9cm}|p{1.2cm}|p{1.8cm}|p{2.7cm}|
+
+.. flat-table:: Overview of Semi-Planar YUV Formats
+ :header-rows: 1
+ :stub-columns: 0
+
+ * - Identifier
+ - Code
+ - Bits per component
+ - Subsampling
+ - Chroma order [1]_
+ - Contiguous [2]_
+ - Tiling [3]_
+ * - V4L2_PIX_FMT_NV12
+ - 'NV12'
+ - 8
+ - 4:2:0
+ - Cb, Cr
+ - Yes
+ - Linear
+ * - V4L2_PIX_FMT_NV21
+ - 'NV21'
+ - 8
+ - 4:2:0
+ - Cr, Cb
+ - Yes
+ - Linear
+ * - V4L2_PIX_FMT_NV12M
+ - 'NM12'
+ - 8
+ - 4:2:0
+ - Cb, Cr
+ - No
+ - Linear
+ * - V4L2_PIX_FMT_NV21M
+ - 'NM21'
+ - 8
+ - 4:2:0
+ - Cr, Cb
+ - No
+ - Linear
+ * - V4L2_PIX_FMT_NV12MT
+ - 'TM12'
+ - 8
+ - 4:2:0
+ - Cb, Cr
+ - No
+ - 64x32 tiles
+
+ Horizontal Z order
+ * - V4L2_PIX_FMT_NV12MT_16X16
+ - 'VM12'
+ - 8
+ - 4:2:2
+ - Cb, Cr
+ - No
+ - 16x16 tiles
+ * - V4L2_PIX_FMT_P010
+ - 'P010'
+ - 10
+ - 4:2:0
+ - Cb, Cr
+ - Yes
+ - Linear
+ * - V4L2_PIX_FMT_P010_4L4
+ - 'T010'
+ - 10
+ - 4:2:0
+ - Cb, Cr
+ - Yes
+ - 4x4 tiles
+ * - V4L2_PIX_FMT_NV16
+ - 'NV16'
+ - 8
+ - 4:2:2
+ - Cb, Cr
+ - Yes
+ - Linear
+ * - V4L2_PIX_FMT_NV61
+ - 'NV61'
+ - 8
+ - 4:2:2
+ - Cr, Cb
+ - Yes
+ - Linear
+ * - V4L2_PIX_FMT_NV16M
+ - 'NM16'
+ - 8
+ - 4:2:2
+ - Cb, Cr
+ - No
+ - Linear
+ * - V4L2_PIX_FMT_NV61M
+ - 'NM61'
+ - 8
+ - 4:2:2
+ - Cr, Cb
+ - No
+ - Linear
+ * - V4L2_PIX_FMT_NV24
+ - 'NV24'
+ - 8
+ - 4:4:4
+ - Cb, Cr
+ - Yes
+ - Linear
+ * - V4L2_PIX_FMT_NV42
+ - 'NV42'
+ - 8
+ - 4:4:4
+ - Cr, Cb
+ - Yes
+ - Linear
+
+.. raw:: latex
+
+ \normalsize
+
+.. [1] Order of chroma samples in the second plane
+.. [2] Indicates if planes have to be contiguous in memory or can be
+ disjoint
+.. [3] Macroblock size in pixels
+
+
+**Color Sample Location:**
+Chroma samples are :ref:`interstitially sited<yuv-chroma-centered>`
+horizontally.
+
+
+.. _V4L2-PIX-FMT-NV12:
+.. _V4L2-PIX-FMT-NV21:
+.. _V4L2-PIX-FMT-NV12M:
+.. _V4L2-PIX-FMT-NV21M:
+.. _V4L2-PIX-FMT-P010:
+
+NV12, NV21, NV12M and NV21M
+---------------------------
+
+Semi-planar YUV 4:2:0 formats. The chroma plane is subsampled by 2 in each
+direction. Chroma lines contain half the number of pixels and the same number
+of bytes as luma lines, and the chroma plane contains half the number of lines
+of the luma plane.
+
+.. flat-table:: Sample 4x4 NV12 Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cb\ :sub:`00`
+ - Cr\ :sub:`00`
+ - Cb\ :sub:`01`
+ - Cr\ :sub:`01`
+ * - start + 20:
+ - Cb\ :sub:`10`
+ - Cr\ :sub:`10`
+ - Cb\ :sub:`11`
+ - Cr\ :sub:`11`
+
+.. flat-table:: Sample 4x4 NV12M Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start0 + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start0 + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start0 + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start0 + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * -
+ * - start1 + 0:
+ - Cb\ :sub:`00`
+ - Cr\ :sub:`00`
+ - Cb\ :sub:`01`
+ - Cr\ :sub:`01`
+ * - start1 + 4:
+ - Cb\ :sub:`10`
+ - Cr\ :sub:`10`
+ - Cb\ :sub:`11`
+ - Cr\ :sub:`11`
+
+
+.. _V4L2-PIX-FMT-NV12MT:
+.. _V4L2-PIX-FMT-NV12MT-16X16:
+.. _V4L2-PIX-FMT-NV12-4L4:
+.. _V4L2-PIX-FMT-NV12-16L16:
+.. _V4L2-PIX-FMT-NV12-32L32:
+.. _V4L2-PIX-FMT-NV12M-8L128:
+.. _V4L2-PIX-FMT-NV12-8L128:
+.. _V4L2-PIX-FMT-NV12M-10BE-8L128:
+.. _V4L2-PIX-FMT-NV12-10BE-8L128:
+.. _V4L2-PIX-FMT-MM21:
+
+Tiled NV12
+----------
+
+Semi-planar YUV 4:2:0 formats, using macroblock tiling. The chroma plane is
+subsampled by 2 in each direction. Chroma lines contain half the number of
+pixels and the same number of bytes as luma lines, and the chroma plane
+contains half the number of lines of the luma plane. Each tile follows the
+previous one linearly in memory (from left to right, top to bottom).
+
+``V4L2_PIX_FMT_NV12MT_16X16`` is similar to ``V4L2_PIX_FMT_NV12M`` but stores
+pixels in 2D 16x16 tiles, and stores tiles linearly in memory.
+The line stride and image height must be aligned to a multiple of 16.
+The layouts of the luma and chroma planes are identical.
+
+``V4L2_PIX_FMT_NV12MT`` is similar to ``V4L2_PIX_FMT_NV12M`` but stores
+pixels in 2D 64x32 tiles, and stores 2x2 groups of tiles in
+Z-order in memory, alternating Z and mirrored Z shapes horizontally.
+The line stride must be a multiple of 128 pixels to ensure an
+integer number of Z shapes. The image height must be a multiple of 32 pixels.
+If the vertical resolution is an odd number of tiles, the last row of
+tiles is stored in linear order. The layouts of the luma and chroma
+planes are identical.
+
+``V4L2_PIX_FMT_NV12_4L4`` stores pixels in 4x4 tiles, and stores
+tiles linearly in memory. The line stride and image height must be
+aligned to a multiple of 4. The layouts of the luma and chroma planes are
+identical.
+
+``V4L2_PIX_FMT_NV12_16L16`` stores pixels in 16x16 tiles, and stores
+tiles linearly in memory. The line stride and image height must be
+aligned to a multiple of 16. The layouts of the luma and chroma planes are
+identical.
+
+``V4L2_PIX_FMT_NV12_32L32`` stores pixels in 32x32 tiles, and stores
+tiles linearly in memory. The line stride and image height must be
+aligned to a multiple of 32. The layouts of the luma and chroma planes are
+identical.
+
+``V4L2_PIX_FMT_NV12M_8L128`` is similar to ``V4L2_PIX_FMT_NV12M`` but stores
+pixels in 2D 8x128 tiles, and stores tiles linearly in memory.
+The image height must be aligned to a multiple of 128.
+The layouts of the luma and chroma planes are identical.
+
+``V4L2_PIX_FMT_NV12_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_8L128`` but stores
+two planes in one memory.
+
+``V4L2_PIX_FMT_NV12M_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M`` but stores
+10 bits pixels in 2D 8x128 tiles, and stores tiles linearly in memory.
+the data is arranged in big endian order.
+The image height must be aligned to a multiple of 128.
+The layouts of the luma and chroma planes are identical.
+Note the tile size is 8bytes multiplied by 128 bytes,
+it means that the low bits and high bits of one pixel may be in different tiles.
+The 10 bit pixels are packed, so 5 bytes contain 4 10-bit pixels layout like
+this (for luma):
+byte 0: Y0(bits 9-2)
+byte 1: Y0(bits 1-0) Y1(bits 9-4)
+byte 2: Y1(bits 3-0) Y2(bits 9-6)
+byte 3: Y2(bits 5-0) Y3(bits 9-8)
+byte 4: Y3(bits 7-0)
+
+``V4L2_PIX_FMT_NV12_10BE_8L128`` is similar to ``V4L2_PIX_FMT_NV12M_10BE_8L128`` but stores
+two planes in one memory.
+
+``V4L2_PIX_FMT_MM21`` store luma pixel in 16x32 tiles, and chroma pixels
+in 16x16 tiles. The line stride must be aligned to a multiple of 16 and the
+image height must be aligned to a multiple of 32. The number of luma and chroma
+tiles are identical, even though the tile size differ. The image is formed of
+two non-contiguous planes.
+
+.. _nv12mt:
+
+.. kernel-figure:: nv12mt.svg
+ :alt: nv12mt.svg
+ :align: center
+
+ V4L2_PIX_FMT_NV12MT macroblock Z shape memory layout
+
+.. _nv12mt_ex:
+
+.. kernel-figure:: nv12mt_example.svg
+ :alt: nv12mt_example.svg
+ :align: center
+
+ Example V4L2_PIX_FMT_NV12MT memory layout of tiles
+
+
+.. _V4L2-PIX-FMT-NV16:
+.. _V4L2-PIX-FMT-NV61:
+.. _V4L2-PIX-FMT-NV16M:
+.. _V4L2-PIX-FMT-NV61M:
+
+NV16, NV61, NV16M and NV61M
+---------------------------
+
+Semi-planar YUV 4:2:2 formats. The chroma plane is subsampled by 2 in the
+horizontal direction. Chroma lines contain half the number of pixels and the
+same number of bytes as luma lines, and the chroma plane contains the same
+number of lines as the luma plane.
+
+.. flat-table:: Sample 4x4 NV16 Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cb\ :sub:`00`
+ - Cr\ :sub:`00`
+ - Cb\ :sub:`01`
+ - Cr\ :sub:`01`
+ * - start + 20:
+ - Cb\ :sub:`10`
+ - Cr\ :sub:`10`
+ - Cb\ :sub:`11`
+ - Cr\ :sub:`11`
+ * - start + 24:
+ - Cb\ :sub:`20`
+ - Cr\ :sub:`20`
+ - Cb\ :sub:`21`
+ - Cr\ :sub:`21`
+ * - start + 28:
+ - Cb\ :sub:`30`
+ - Cr\ :sub:`30`
+ - Cb\ :sub:`31`
+ - Cr\ :sub:`31`
+
+.. flat-table:: Sample 4x4 NV16M Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start0 + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start0 + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start0 + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start0 + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * -
+ * - start1 + 0:
+ - Cb\ :sub:`00`
+ - Cr\ :sub:`00`
+ - Cb\ :sub:`02`
+ - Cr\ :sub:`02`
+ * - start1 + 4:
+ - Cb\ :sub:`10`
+ - Cr\ :sub:`10`
+ - Cb\ :sub:`12`
+ - Cr\ :sub:`12`
+ * - start1 + 8:
+ - Cb\ :sub:`20`
+ - Cr\ :sub:`20`
+ - Cb\ :sub:`22`
+ - Cr\ :sub:`22`
+ * - start1 + 12:
+ - Cb\ :sub:`30`
+ - Cr\ :sub:`30`
+ - Cb\ :sub:`32`
+ - Cr\ :sub:`32`
+
+
+.. _V4L2-PIX-FMT-NV24:
+.. _V4L2-PIX-FMT-NV42:
+
+NV24 and NV42
+-------------
+
+Semi-planar YUV 4:4:4 formats. The chroma plane is not subsampled.
+Chroma lines contain the same number of pixels and twice the
+number of bytes as luma lines, and the chroma plane contains the same
+number of lines as the luma plane.
+
+.. flat-table:: Sample 4x4 NV24 Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cb\ :sub:`00`
+ - Cr\ :sub:`00`
+ - Cb\ :sub:`01`
+ - Cr\ :sub:`01`
+ - Cb\ :sub:`02`
+ - Cr\ :sub:`02`
+ - Cb\ :sub:`03`
+ - Cr\ :sub:`03`
+ * - start + 24:
+ - Cb\ :sub:`10`
+ - Cr\ :sub:`10`
+ - Cb\ :sub:`11`
+ - Cr\ :sub:`11`
+ - Cb\ :sub:`12`
+ - Cr\ :sub:`12`
+ - Cb\ :sub:`13`
+ - Cr\ :sub:`13`
+ * - start + 32:
+ - Cb\ :sub:`20`
+ - Cr\ :sub:`20`
+ - Cb\ :sub:`21`
+ - Cr\ :sub:`21`
+ - Cb\ :sub:`22`
+ - Cr\ :sub:`22`
+ - Cb\ :sub:`23`
+ - Cr\ :sub:`23`
+ * - start + 40:
+ - Cb\ :sub:`30`
+ - Cr\ :sub:`30`
+ - Cb\ :sub:`31`
+ - Cr\ :sub:`31`
+ - Cb\ :sub:`32`
+ - Cr\ :sub:`32`
+ - Cb\ :sub:`33`
+ - Cr\ :sub:`33`
+
+.. _V4L2_PIX_FMT_P010:
+.. _V4L2-PIX-FMT-P010-4L4:
+
+P010 and tiled P010
+-------------------
+
+P010 is like NV12 with 10 bits per component, expanded to 16 bits.
+Data in the 10 high bits, zeros in the 6 low bits, arranged in little endian order.
+
+.. flat-table:: Sample 4x4 P010 Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 8:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 16:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 24:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 32:
+ - Cb\ :sub:`00`
+ - Cr\ :sub:`00`
+ - Cb\ :sub:`01`
+ - Cr\ :sub:`01`
+ * - start + 40:
+ - Cb\ :sub:`10`
+ - Cr\ :sub:`10`
+ - Cb\ :sub:`11`
+ - Cr\ :sub:`11`
+
+
+Fully Planar YUV Formats
+========================
+
+These formats store the Y, Cb and Cr components in three separate planes. The
+luma plane comes first, and the order of the two chroma planes varies between
+formats. The two chroma planes always use the same subsampling.
+
+For memory contiguous formats, the number of padding pixels at the end of the
+chroma lines is identical to the padding of the luma lines. The chroma line
+stride (in bytes) is thus equal to the luma line stride divided by the
+horizontal subsampling factor. Vertical subsampling doesn't affect the line
+stride.
+
+For non-contiguous formats, no constraints are enforced by the format on the
+relationship between the luma and chroma line padding and stride.
+
+All components are stored with the same number of bits per component.
+
+``V4L2_PIX_FMT_P010_4L4`` stores pixels in 4x4 tiles, and stores tiles linearly
+in memory. The line stride must be aligned to multiple of 8 and image height to
+a multiple of 4. The layouts of the luma and chroma planes are identical.
+
+.. raw:: latex
+
+ \small
+
+.. tabularcolumns:: |p{5.0cm}|p{1.1cm}|p{1.5cm}|p{2.2cm}|p{1.2cm}|p{3.7cm}|
+
+.. flat-table:: Overview of Fully Planar YUV Formats
+ :header-rows: 1
+ :stub-columns: 0
+
+ * - Identifier
+ - Code
+ - Bits per component
+ - Subsampling
+ - Planes order [4]_
+ - Contiguous [5]_
+
+ * - V4L2_PIX_FMT_YUV410
+ - 'YUV9'
+ - 8
+ - 4:1:0
+ - Y, Cb, Cr
+ - Yes
+ * - V4L2_PIX_FMT_YVU410
+ - 'YVU9'
+ - 8
+ - 4:1:0
+ - Y, Cr, Cb
+ - Yes
+ * - V4L2_PIX_FMT_YUV411P
+ - '411P'
+ - 8
+ - 4:1:1
+ - Y, Cb, Cr
+ - Yes
+ * - V4L2_PIX_FMT_YUV420M
+ - 'YM12'
+ - 8
+ - 4:2:0
+ - Y, Cb, Cr
+ - No
+ * - V4L2_PIX_FMT_YVU420M
+ - 'YM21'
+ - 8
+ - 4:2:0
+ - Y, Cr, Cb
+ - No
+ * - V4L2_PIX_FMT_YUV420
+ - 'YU12'
+ - 8
+ - 4:2:0
+ - Y, Cb, Cr
+ - Yes
+ * - V4L2_PIX_FMT_YVU420
+ - 'YV12'
+ - 8
+ - 4:2:0
+ - Y, Cr, Cb
+ - Yes
+ * - V4L2_PIX_FMT_YUV422P
+ - '422P'
+ - 8
+ - 4:2:2
+ - Y, Cb, Cr
+ - Yes
+ * - V4L2_PIX_FMT_YUV422M
+ - 'YM16'
+ - 8
+ - 4:2:2
+ - Y, Cb, Cr
+ - No
+ * - V4L2_PIX_FMT_YVU422M
+ - 'YM61'
+ - 8
+ - 4:2:2
+ - Y, Cr, Cb
+ - No
+ * - V4L2_PIX_FMT_YUV444M
+ - 'YM24'
+ - 8
+ - 4:4:4
+ - Y, Cb, Cr
+ - No
+ * - V4L2_PIX_FMT_YVU444M
+ - 'YM42'
+ - 8
+ - 4:4:4
+ - Y, Cr, Cb
+ - No
+
+.. raw:: latex
+
+ \normalsize
+
+.. [4] Order of luma and chroma planes
+.. [5] Indicates if planes have to be contiguous in memory or can be
+ disjoint
+
+
+**Color Sample Location:**
+Chroma samples are :ref:`interstitially sited<yuv-chroma-centered>`
+horizontally.
+
+.. _V4L2-PIX-FMT-YUV410:
+.. _V4L2-PIX-FMT-YVU410:
+
+YUV410 and YVU410
+-----------------
+
+Planar YUV 4:1:0 formats. The chroma planes are subsampled by 4 in each
+direction. Chroma lines contain a quarter of the number of pixels and bytes of
+the luma lines, and the chroma planes contain a quarter of the number of lines
+of the luma plane.
+
+.. flat-table:: Sample 4x4 YUV410 Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cr\ :sub:`00`
+ * - start + 17:
+ - Cb\ :sub:`00`
+
+
+.. _V4L2-PIX-FMT-YUV411P:
+
+YUV411P
+-------
+
+Planar YUV 4:1:1 formats. The chroma planes are subsampled by 4 in the
+horizontal direction. Chroma lines contain a quarter of the number of pixels
+and bytes of the luma lines, and the chroma planes contain the same number of
+lines as the luma plane.
+
+.. flat-table:: Sample 4x4 YUV411P Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cb\ :sub:`00`
+ * - start + 17:
+ - Cb\ :sub:`10`
+ * - start + 18:
+ - Cb\ :sub:`20`
+ * - start + 19:
+ - Cb\ :sub:`30`
+ * - start + 20:
+ - Cr\ :sub:`00`
+ * - start + 21:
+ - Cr\ :sub:`10`
+ * - start + 22:
+ - Cr\ :sub:`20`
+ * - start + 23:
+ - Cr\ :sub:`30`
+
+
+.. _V4L2-PIX-FMT-YUV420:
+.. _V4L2-PIX-FMT-YVU420:
+.. _V4L2-PIX-FMT-YUV420M:
+.. _V4L2-PIX-FMT-YVU420M:
+
+YUV420, YVU420, YUV420M and YVU420M
+-----------------------------------
+
+Planar YUV 4:2:0 formats. The chroma planes are subsampled by 2 in each
+direction. Chroma lines contain half of the number of pixels and bytes of the
+luma lines, and the chroma planes contain half of the number of lines of the
+luma plane.
+
+.. flat-table:: Sample 4x4 YUV420 Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cr\ :sub:`00`
+ - Cr\ :sub:`01`
+ * - start + 18:
+ - Cr\ :sub:`10`
+ - Cr\ :sub:`11`
+ * - start + 20:
+ - Cb\ :sub:`00`
+ - Cb\ :sub:`01`
+ * - start + 22:
+ - Cb\ :sub:`10`
+ - Cb\ :sub:`11`
+
+.. flat-table:: Sample 4x4 YUV420M Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start0 + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start0 + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start0 + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start0 + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * -
+ * - start1 + 0:
+ - Cb\ :sub:`00`
+ - Cb\ :sub:`01`
+ * - start1 + 2:
+ - Cb\ :sub:`10`
+ - Cb\ :sub:`11`
+ * -
+ * - start2 + 0:
+ - Cr\ :sub:`00`
+ - Cr\ :sub:`01`
+ * - start2 + 2:
+ - Cr\ :sub:`10`
+ - Cr\ :sub:`11`
+
+
+.. _V4L2-PIX-FMT-YUV422P:
+.. _V4L2-PIX-FMT-YUV422M:
+.. _V4L2-PIX-FMT-YVU422M:
+
+YUV422P, YUV422M and YVU422M
+----------------------------
+
+Planar YUV 4:2:2 formats. The chroma planes are subsampled by 2 in the
+horizontal direction. Chroma lines contain half of the number of pixels and
+bytes of the luma lines, and the chroma planes contain the same number of lines
+as the luma plane.
+
+.. flat-table:: Sample 4x4 YUV422P Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * - start + 16:
+ - Cb\ :sub:`00`
+ - Cb\ :sub:`01`
+ * - start + 18:
+ - Cb\ :sub:`10`
+ - Cb\ :sub:`11`
+ * - start + 20:
+ - Cb\ :sub:`20`
+ - Cb\ :sub:`21`
+ * - start + 22:
+ - Cb\ :sub:`30`
+ - Cb\ :sub:`31`
+ * - start + 24:
+ - Cr\ :sub:`00`
+ - Cr\ :sub:`01`
+ * - start + 26:
+ - Cr\ :sub:`10`
+ - Cr\ :sub:`11`
+ * - start + 28:
+ - Cr\ :sub:`20`
+ - Cr\ :sub:`21`
+ * - start + 30:
+ - Cr\ :sub:`30`
+ - Cr\ :sub:`31`
+
+.. flat-table:: Sample 4x4 YUV422M Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start0 + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start0 + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start0 + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start0 + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * -
+ * - start1 + 0:
+ - Cb\ :sub:`00`
+ - Cb\ :sub:`01`
+ * - start1 + 2:
+ - Cb\ :sub:`10`
+ - Cb\ :sub:`11`
+ * - start1 + 4:
+ - Cb\ :sub:`20`
+ - Cb\ :sub:`21`
+ * - start1 + 6:
+ - Cb\ :sub:`30`
+ - Cb\ :sub:`31`
+ * -
+ * - start2 + 0:
+ - Cr\ :sub:`00`
+ - Cr\ :sub:`01`
+ * - start2 + 2:
+ - Cr\ :sub:`10`
+ - Cr\ :sub:`11`
+ * - start2 + 4:
+ - Cr\ :sub:`20`
+ - Cr\ :sub:`21`
+ * - start2 + 6:
+ - Cr\ :sub:`30`
+ - Cr\ :sub:`31`
+
+
+.. _V4L2-PIX-FMT-YUV444M:
+.. _V4L2-PIX-FMT-YVU444M:
+
+YUV444M and YVU444M
+-------------------
+
+Planar YUV 4:4:4 formats. The chroma planes are no subsampled. Chroma lines
+contain the same number of pixels and bytes of the luma lines, and the chroma
+planes contain the same number of lines as the luma plane.
+
+.. flat-table:: Sample 4x4 YUV444M Image
+ :header-rows: 0
+ :stub-columns: 0
+
+ * - start0 + 0:
+ - Y'\ :sub:`00`
+ - Y'\ :sub:`01`
+ - Y'\ :sub:`02`
+ - Y'\ :sub:`03`
+ * - start0 + 4:
+ - Y'\ :sub:`10`
+ - Y'\ :sub:`11`
+ - Y'\ :sub:`12`
+ - Y'\ :sub:`13`
+ * - start0 + 8:
+ - Y'\ :sub:`20`
+ - Y'\ :sub:`21`
+ - Y'\ :sub:`22`
+ - Y'\ :sub:`23`
+ * - start0 + 12:
+ - Y'\ :sub:`30`
+ - Y'\ :sub:`31`
+ - Y'\ :sub:`32`
+ - Y'\ :sub:`33`
+ * -
+ * - start1 + 0:
+ - Cb\ :sub:`00`
+ - Cb\ :sub:`01`
+ - Cb\ :sub:`02`
+ - Cb\ :sub:`03`
+ * - start1 + 4:
+ - Cb\ :sub:`10`
+ - Cb\ :sub:`11`
+ - Cb\ :sub:`12`
+ - Cb\ :sub:`13`
+ * - start1 + 8:
+ - Cb\ :sub:`20`
+ - Cb\ :sub:`21`
+ - Cb\ :sub:`22`
+ - Cb\ :sub:`23`
+ * - start1 + 12:
+ - Cb\ :sub:`20`
+ - Cb\ :sub:`21`
+ - Cb\ :sub:`32`
+ - Cb\ :sub:`33`
+ * -
+ * - start2 + 0:
+ - Cr\ :sub:`00`
+ - Cr\ :sub:`01`
+ - Cr\ :sub:`02`
+ - Cr\ :sub:`03`
+ * - start2 + 4:
+ - Cr\ :sub:`10`
+ - Cr\ :sub:`11`
+ - Cr\ :sub:`12`
+ - Cr\ :sub:`13`
+ * - start2 + 8:
+ - Cr\ :sub:`20`
+ - Cr\ :sub:`21`
+ - Cr\ :sub:`22`
+ - Cr\ :sub:`23`
+ * - start2 + 12:
+ - Cr\ :sub:`30`
+ - Cr\ :sub:`31`
+ - Cr\ :sub:`32`
+ - Cr\ :sub:`33`