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().
  ...

1 files changed, 605 insertions, 0 deletions

diff --git a/drivers/media/platform/allegro-dvt/nal-h264.c b/drivers/media/platform/allegro-dvt/nal-h264.c
new file mode 100644
index 000000000..326637663
--- /dev/null
+++ b/drivers/media/platform/allegro-dvt/nal-h264.c
@@ -0,0 +1,605 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2019 Pengutronix, Michael Tretter <kernel@pengutronix.de>
+ *
+ * Convert NAL units between raw byte sequence payloads (RBSP) and C structs
+ *
+ * The conversion is defined in "ITU-T Rec. H.264 (04/2017) Advanced video
+ * coding for generic audiovisual services". Decoder drivers may use the
+ * parser to parse RBSP from encoded streams and configure the hardware, if
+ * the hardware is not able to parse RBSP itself.  Encoder drivers may use the
+ * generator to generate the RBSP for SPS/PPS nal units and add them to the
+ * encoded stream if the hardware does not generate the units.
+ */
+
+#include <linux/kernel.h>
+#include <linux/types.h>
+#include <linux/string.h>
+#include <linux/v4l2-controls.h>
+
+#include <linux/device.h>
+#include <linux/export.h>
+#include <linux/log2.h>
+
+#include "nal-h264.h"
+#include "nal-rbsp.h"
+
+/*
+ * See Rec. ITU-T H.264 (04/2017) Table 7-1 - NAL unit type codes, syntax
+ * element categories, and NAL unit type classes
+ */
+enum nal_unit_type {
+	SEQUENCE_PARAMETER_SET = 7,
+	PICTURE_PARAMETER_SET = 8,
+	FILLER_DATA = 12,
+};
+
+static void nal_h264_write_start_code_prefix(struct rbsp *rbsp)
+{
+	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
+	int i = 4;
+
+	if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	p[0] = 0x00;
+	p[1] = 0x00;
+	p[2] = 0x00;
+	p[3] = 0x01;
+
+	rbsp->pos += i * 8;
+}
+
+static void nal_h264_read_start_code_prefix(struct rbsp *rbsp)
+{
+	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
+	int i = 4;
+
+	if (DIV_ROUND_UP(rbsp->pos, 8) + i > rbsp->size) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	if (p[0] != 0x00 || p[1] != 0x00 || p[2] != 0x00 || p[3] != 0x01) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	rbsp->pos += i * 8;
+}
+
+static void nal_h264_write_filler_data(struct rbsp *rbsp)
+{
+	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
+	int i;
+
+	/* Keep 1 byte extra for terminating the NAL unit */
+	i = rbsp->size - DIV_ROUND_UP(rbsp->pos, 8) - 1;
+	memset(p, 0xff, i);
+	rbsp->pos += i * 8;
+}
+
+static void nal_h264_read_filler_data(struct rbsp *rbsp)
+{
+	u8 *p = rbsp->data + DIV_ROUND_UP(rbsp->pos, 8);
+
+	while (*p == 0xff) {
+		if (DIV_ROUND_UP(rbsp->pos, 8) > rbsp->size) {
+			rbsp->error = -EINVAL;
+			return;
+		}
+
+		p++;
+		rbsp->pos += 8;
+	}
+}
+
+static void nal_h264_rbsp_hrd_parameters(struct rbsp *rbsp,
+					 struct nal_h264_hrd_parameters *hrd)
+{
+	unsigned int i;
+
+	if (!hrd) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	rbsp_uev(rbsp, &hrd->cpb_cnt_minus1);
+	rbsp_bits(rbsp, 4, &hrd->bit_rate_scale);
+	rbsp_bits(rbsp, 4, &hrd->cpb_size_scale);
+
+	for (i = 0; i <= hrd->cpb_cnt_minus1; i++) {
+		rbsp_uev(rbsp, &hrd->bit_rate_value_minus1[i]);
+		rbsp_uev(rbsp, &hrd->cpb_size_value_minus1[i]);
+		rbsp_bit(rbsp, &hrd->cbr_flag[i]);
+	}
+
+	rbsp_bits(rbsp, 5, &hrd->initial_cpb_removal_delay_length_minus1);
+	rbsp_bits(rbsp, 5, &hrd->cpb_removal_delay_length_minus1);
+	rbsp_bits(rbsp, 5, &hrd->dpb_output_delay_length_minus1);
+	rbsp_bits(rbsp, 5, &hrd->time_offset_length);
+}
+
+static void nal_h264_rbsp_vui_parameters(struct rbsp *rbsp,
+					 struct nal_h264_vui_parameters *vui)
+{
+	if (!vui) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	rbsp_bit(rbsp, &vui->aspect_ratio_info_present_flag);
+	if (vui->aspect_ratio_info_present_flag) {
+		rbsp_bits(rbsp, 8, &vui->aspect_ratio_idc);
+		if (vui->aspect_ratio_idc == 255) {
+			rbsp_bits(rbsp, 16, &vui->sar_width);
+			rbsp_bits(rbsp, 16, &vui->sar_height);
+		}
+	}
+
+	rbsp_bit(rbsp, &vui->overscan_info_present_flag);
+	if (vui->overscan_info_present_flag)
+		rbsp_bit(rbsp, &vui->overscan_appropriate_flag);
+
+	rbsp_bit(rbsp, &vui->video_signal_type_present_flag);
+	if (vui->video_signal_type_present_flag) {
+		rbsp_bits(rbsp, 3, &vui->video_format);
+		rbsp_bit(rbsp, &vui->video_full_range_flag);
+
+		rbsp_bit(rbsp, &vui->colour_description_present_flag);
+		if (vui->colour_description_present_flag) {
+			rbsp_bits(rbsp, 8, &vui->colour_primaries);
+			rbsp_bits(rbsp, 8, &vui->transfer_characteristics);
+			rbsp_bits(rbsp, 8, &vui->matrix_coefficients);
+		}
+	}
+
+	rbsp_bit(rbsp, &vui->chroma_loc_info_present_flag);
+	if (vui->chroma_loc_info_present_flag) {
+		rbsp_uev(rbsp, &vui->chroma_sample_loc_type_top_field);
+		rbsp_uev(rbsp, &vui->chroma_sample_loc_type_bottom_field);
+	}
+
+	rbsp_bit(rbsp, &vui->timing_info_present_flag);
+	if (vui->timing_info_present_flag) {
+		rbsp_bits(rbsp, 32, &vui->num_units_in_tick);
+		rbsp_bits(rbsp, 32, &vui->time_scale);
+		rbsp_bit(rbsp, &vui->fixed_frame_rate_flag);
+	}
+
+	rbsp_bit(rbsp, &vui->nal_hrd_parameters_present_flag);
+	if (vui->nal_hrd_parameters_present_flag)
+		nal_h264_rbsp_hrd_parameters(rbsp, &vui->nal_hrd_parameters);
+
+	rbsp_bit(rbsp, &vui->vcl_hrd_parameters_present_flag);
+	if (vui->vcl_hrd_parameters_present_flag)
+		nal_h264_rbsp_hrd_parameters(rbsp, &vui->vcl_hrd_parameters);
+
+	if (vui->nal_hrd_parameters_present_flag ||
+	    vui->vcl_hrd_parameters_present_flag)
+		rbsp_bit(rbsp, &vui->low_delay_hrd_flag);
+
+	rbsp_bit(rbsp, &vui->pic_struct_present_flag);
+
+	rbsp_bit(rbsp, &vui->bitstream_restriction_flag);
+	if (vui->bitstream_restriction_flag) {
+		rbsp_bit(rbsp, &vui->motion_vectors_over_pic_boundaries_flag);
+		rbsp_uev(rbsp, &vui->max_bytes_per_pic_denom);
+		rbsp_uev(rbsp, &vui->max_bits_per_mb_denom);
+		rbsp_uev(rbsp, &vui->log2_max_mv_length_horizontal);
+		rbsp_uev(rbsp, &vui->log21_max_mv_length_vertical);
+		rbsp_uev(rbsp, &vui->max_num_reorder_frames);
+		rbsp_uev(rbsp, &vui->max_dec_frame_buffering);
+	}
+}
+
+static void nal_h264_rbsp_sps(struct rbsp *rbsp, struct nal_h264_sps *sps)
+{
+	unsigned int i;
+
+	if (!sps) {
+		rbsp->error = -EINVAL;
+		return;
+	}
+
+	rbsp_bits(rbsp, 8, &sps->profile_idc);
+	rbsp_bit(rbsp, &sps->constraint_set0_flag);
+	rbsp_bit(rbsp, &sps->constraint_set1_flag);
+	rbsp_bit(rbsp, &sps->constraint_set2_flag);
+	rbsp_bit(rbsp, &sps->constraint_set3_flag);
+	rbsp_bit(rbsp, &sps->constraint_set4_flag);
+	rbsp_bit(rbsp, &sps->constraint_set5_flag);
+	rbsp_bits(rbsp, 2, &sps->reserved_zero_2bits);
+	rbsp_bits(rbsp, 8, &sps->level_idc);
+
+	rbsp_uev(rbsp, &sps->seq_parameter_set_id);
+
+	if (sps->profile_idc == 100 || sps->profile_idc == 110 ||
+	    sps->profile_idc == 122 || sps->profile_idc == 244 ||
+	    sps->profile_idc == 44 || sps->profile_idc == 83 ||
+	    sps->profile_idc == 86 || sps->profile_idc == 118 ||
+	    sps->profile_idc == 128 || sps->profile_idc == 138 ||
+	    sps->profile_idc == 139 || sps->profile_idc == 134 ||
+	    sps->profile_idc == 135) {
+		rbsp_uev(rbsp, &sps->chroma_format_idc);
+
+		if (sps->chroma_format_idc == 3)
+			rbsp_bit(rbsp, &sps->separate_colour_plane_flag);
+		rbsp_uev(rbsp, &sps->bit_depth_luma_minus8);
+		rbsp_uev(rbsp, &sps->bit_depth_chroma_minus8);
+		rbsp_bit(rbsp, &sps->qpprime_y_zero_transform_bypass_flag);
+		rbsp_bit(rbsp, &sps->seq_scaling_matrix_present_flag);
+		if (sps->seq_scaling_matrix_present_flag)
+			rbsp->error = -EINVAL;
+	}
+
+	rbsp_uev(rbsp, &sps->log2_max_frame_num_minus4);
+
+	rbsp_uev(rbsp, &sps->pic_order_cnt_type);
+	switch (sps->pic_order_cnt_type) {
+	case 0:
+		rbsp_uev(rbsp, &sps->log2_max_pic_order_cnt_lsb_minus4);
+		break;
+	case 1:
+		rbsp_bit(rbsp, &sps->delta_pic_order_always_zero_flag);
+		rbsp_sev(rbsp, &sps->offset_for_non_ref_pic);
+		rbsp_sev(rbsp, &sps->offset_for_top_to_bottom_field);
+
+		rbsp_uev(rbsp, &sps->num_ref_frames_in_pic_order_cnt_cycle);
+		for (i = 0; i < sps->num_ref_frames_in_pic_order_cnt_cycle; i++)
+			rbsp_sev(rbsp, &sps->offset_for_ref_frame[i]);
+		break;
+	default:
+		rbsp->error = -EINVAL;
+		break;
+	}
+
+	rbsp_uev(rbsp, &sps->max_num_ref_frames);
+	rbsp_bit(rbsp, &sps->gaps_in_frame_num_value_allowed_flag);
+	rbsp_uev(rbsp, &sps->pic_width_in_mbs_minus1);
+	rbsp_uev(rbsp, &sps->pic_height_in_map_units_minus1);
+
+	rbsp_bit(rbsp, &sps->frame_mbs_only_flag);
+	if (!sps->frame_mbs_only_flag)
+		rbsp_bit(rbsp, &sps->mb_adaptive_frame_field_flag);
+
+	rbsp_bit(rbsp, &sps->direct_8x8_inference_flag);
+
+	rbsp_bit(rbsp, &sps->frame_cropping_flag);
+	if (sps->frame_cropping_flag) {
+		rbsp_uev(rbsp, &sps->crop_left);
+		rbsp_uev(rbsp, &sps->crop_right);
+		rbsp_uev(rbsp, &sps->crop_top);
+		rbsp_uev(rbsp, &sps->crop_bottom);
+	}
+
+	rbsp_bit(rbsp, &sps->vui_parameters_present_flag);
+	if (sps->vui_parameters_present_flag)
+		nal_h264_rbsp_vui_parameters(rbsp, &sps->vui);
+}
+
+static void nal_h264_rbsp_pps(struct rbsp *rbsp, struct nal_h264_pps *pps)
+{
+	int i;
+
+	rbsp_uev(rbsp, &pps->pic_parameter_set_id);
+	rbsp_uev(rbsp, &pps->seq_parameter_set_id);
+	rbsp_bit(rbsp, &pps->entropy_coding_mode_flag);
+	rbsp_bit(rbsp, &pps->bottom_field_pic_order_in_frame_present_flag);
+	rbsp_uev(rbsp, &pps->num_slice_groups_minus1);
+	if (pps->num_slice_groups_minus1 > 0) {
+		rbsp_uev(rbsp, &pps->slice_group_map_type);
+		switch (pps->slice_group_map_type) {
+		case 0:
+			for (i = 0; i < pps->num_slice_groups_minus1; i++)
+				rbsp_uev(rbsp, &pps->run_length_minus1[i]);
+			break;
+		case 2:
+			for (i = 0; i < pps->num_slice_groups_minus1; i++) {
+				rbsp_uev(rbsp, &pps->top_left[i]);
+				rbsp_uev(rbsp, &pps->bottom_right[i]);
+			}
+			break;
+		case 3: case 4: case 5:
+			rbsp_bit(rbsp, &pps->slice_group_change_direction_flag);
+			rbsp_uev(rbsp, &pps->slice_group_change_rate_minus1);
+			break;
+		case 6:
+			rbsp_uev(rbsp, &pps->pic_size_in_map_units_minus1);
+			for (i = 0; i < pps->pic_size_in_map_units_minus1; i++)
+				rbsp_bits(rbsp,
+					  order_base_2(pps->num_slice_groups_minus1 + 1),
+					  &pps->slice_group_id[i]);
+			break;
+		default:
+			break;
+		}
+	}
+	rbsp_uev(rbsp, &pps->num_ref_idx_l0_default_active_minus1);
+	rbsp_uev(rbsp, &pps->num_ref_idx_l1_default_active_minus1);
+	rbsp_bit(rbsp, &pps->weighted_pred_flag);
+	rbsp_bits(rbsp, 2, &pps->weighted_bipred_idc);
+	rbsp_sev(rbsp, &pps->pic_init_qp_minus26);
+	rbsp_sev(rbsp, &pps->pic_init_qs_minus26);
+	rbsp_sev(rbsp, &pps->chroma_qp_index_offset);
+	rbsp_bit(rbsp, &pps->deblocking_filter_control_present_flag);
+	rbsp_bit(rbsp, &pps->constrained_intra_pred_flag);
+	rbsp_bit(rbsp, &pps->redundant_pic_cnt_present_flag);
+	if (/* more_rbsp_data() */ false) {
+		rbsp_bit(rbsp, &pps->transform_8x8_mode_flag);
+		rbsp_bit(rbsp, &pps->pic_scaling_matrix_present_flag);
+		if (pps->pic_scaling_matrix_present_flag)
+			rbsp->error = -EINVAL;
+		rbsp_sev(rbsp, &pps->second_chroma_qp_index_offset);
+	}
+}
+
+/**
+ * nal_h264_write_sps() - Write SPS NAL unit into RBSP format
+ * @dev: device pointer
+ * @dest: the buffer that is filled with RBSP data
+ * @n: maximum size of @dest in bytes
+ * @sps: &struct nal_h264_sps to convert to RBSP
+ *
+ * Convert @sps to RBSP data and write it into @dest.
+ *
+ * The size of the SPS NAL unit is not known in advance and this function will
+ * fail, if @dest does not hold sufficient space for the SPS NAL unit.
+ *
+ * Return: number of bytes written to @dest or negative error code
+ */
+ssize_t nal_h264_write_sps(const struct device *dev,
+			   void *dest, size_t n, struct nal_h264_sps *sps)
+{
+	struct rbsp rbsp;
+	unsigned int forbidden_zero_bit = 0;
+	unsigned int nal_ref_idc = 0;
+	unsigned int nal_unit_type = SEQUENCE_PARAMETER_SET;
+
+	if (!dest)
+		return -EINVAL;
+
+	rbsp_init(&rbsp, dest, n, &write);
+
+	nal_h264_write_start_code_prefix(&rbsp);
+
+	rbsp_bit(&rbsp, &forbidden_zero_bit);
+	rbsp_bits(&rbsp, 2, &nal_ref_idc);
+	rbsp_bits(&rbsp, 5, &nal_unit_type);
+
+	nal_h264_rbsp_sps(&rbsp, sps);
+
+	rbsp_trailing_bits(&rbsp);
+
+	if (rbsp.error)
+		return rbsp.error;
+
+	return DIV_ROUND_UP(rbsp.pos, 8);
+}
+EXPORT_SYMBOL_GPL(nal_h264_write_sps);
+
+/**
+ * nal_h264_read_sps() - Read SPS NAL unit from RBSP format
+ * @dev: device pointer
+ * @sps: the &struct nal_h264_sps to fill from the RBSP data
+ * @src: the buffer that contains the RBSP data
+ * @n: size of @src in bytes
+ *
+ * Read RBSP data from @src and use it to fill @sps.
+ *
+ * Return: number of bytes read from @src or negative error code
+ */
+ssize_t nal_h264_read_sps(const struct device *dev,
+			  struct nal_h264_sps *sps, void *src, size_t n)
+{
+	struct rbsp rbsp;
+	unsigned int forbidden_zero_bit;
+	unsigned int nal_ref_idc;
+	unsigned int nal_unit_type;
+
+	if (!src)
+		return -EINVAL;
+
+	rbsp_init(&rbsp, src, n, &read);
+
+	nal_h264_read_start_code_prefix(&rbsp);
+
+	rbsp_bit(&rbsp, &forbidden_zero_bit);
+	rbsp_bits(&rbsp, 2, &nal_ref_idc);
+	rbsp_bits(&rbsp, 5, &nal_unit_type);
+
+	if (rbsp.error ||
+	    forbidden_zero_bit != 0 ||
+	    nal_ref_idc != 0 ||
+	    nal_unit_type != SEQUENCE_PARAMETER_SET)
+		return -EINVAL;
+
+	nal_h264_rbsp_sps(&rbsp, sps);
+
+	rbsp_trailing_bits(&rbsp);
+
+	if (rbsp.error)
+		return rbsp.error;
+
+	return DIV_ROUND_UP(rbsp.pos, 8);
+}
+EXPORT_SYMBOL_GPL(nal_h264_read_sps);
+
+/**
+ * nal_h264_write_pps() - Write PPS NAL unit into RBSP format
+ * @dev: device pointer
+ * @dest: the buffer that is filled with RBSP data
+ * @n: maximum size of @dest in bytes
+ * @pps: &struct nal_h264_pps to convert to RBSP
+ *
+ * Convert @pps to RBSP data and write it into @dest.
+ *
+ * The size of the PPS NAL unit is not known in advance and this function will
+ * fail, if @dest does not hold sufficient space for the PPS NAL unit.
+ *
+ * Return: number of bytes written to @dest or negative error code
+ */
+ssize_t nal_h264_write_pps(const struct device *dev,
+			   void *dest, size_t n, struct nal_h264_pps *pps)
+{
+	struct rbsp rbsp;
+	unsigned int forbidden_zero_bit = 0;
+	unsigned int nal_ref_idc = 0;
+	unsigned int nal_unit_type = PICTURE_PARAMETER_SET;
+
+	if (!dest)
+		return -EINVAL;
+
+	rbsp_init(&rbsp, dest, n, &write);
+
+	nal_h264_write_start_code_prefix(&rbsp);
+
+	/* NAL unit header */
+	rbsp_bit(&rbsp, &forbidden_zero_bit);
+	rbsp_bits(&rbsp, 2, &nal_ref_idc);
+	rbsp_bits(&rbsp, 5, &nal_unit_type);
+
+	nal_h264_rbsp_pps(&rbsp, pps);
+
+	rbsp_trailing_bits(&rbsp);
+
+	if (rbsp.error)
+		return rbsp.error;
+
+	return DIV_ROUND_UP(rbsp.pos, 8);
+}
+EXPORT_SYMBOL_GPL(nal_h264_write_pps);
+
+/**
+ * nal_h264_read_pps() - Read PPS NAL unit from RBSP format
+ * @dev: device pointer
+ * @pps: the &struct nal_h264_pps to fill from the RBSP data
+ * @src: the buffer that contains the RBSP data
+ * @n: size of @src in bytes
+ *
+ * Read RBSP data from @src and use it to fill @pps.
+ *
+ * Return: number of bytes read from @src or negative error code
+ */
+ssize_t nal_h264_read_pps(const struct device *dev,
+			  struct nal_h264_pps *pps, void *src, size_t n)
+{
+	struct rbsp rbsp;
+
+	if (!src)
+		return -EINVAL;
+
+	rbsp_init(&rbsp, src, n, &read);
+
+	nal_h264_read_start_code_prefix(&rbsp);
+
+	/* NAL unit header */
+	rbsp.pos += 8;
+
+	nal_h264_rbsp_pps(&rbsp, pps);
+
+	rbsp_trailing_bits(&rbsp);
+
+	if (rbsp.error)
+		return rbsp.error;
+
+	return DIV_ROUND_UP(rbsp.pos, 8);
+}
+EXPORT_SYMBOL_GPL(nal_h264_read_pps);
+
+/**
+ * nal_h264_write_filler() - Write filler data RBSP
+ * @dev: device pointer
+ * @dest: buffer to fill with filler data
+ * @n: size of the buffer to fill with filler data
+ *
+ * Write a filler data RBSP to @dest with a size of @n bytes and return the
+ * number of written filler data bytes.
+ *
+ * Use this function to generate dummy data in an RBSP data stream that can be
+ * safely ignored by h264 decoders.
+ *
+ * The RBSP format of the filler data is specified in Rec. ITU-T H.264
+ * (04/2017) 7.3.2.7 Filler data RBSP syntax.
+ *
+ * Return: number of filler data bytes (including marker) or negative error
+ */
+ssize_t nal_h264_write_filler(const struct device *dev, void *dest, size_t n)
+{
+	struct rbsp rbsp;
+	unsigned int forbidden_zero_bit = 0;
+	unsigned int nal_ref_idc = 0;
+	unsigned int nal_unit_type = FILLER_DATA;
+
+	if (!dest)
+		return -EINVAL;
+
+	rbsp_init(&rbsp, dest, n, &write);
+
+	nal_h264_write_start_code_prefix(&rbsp);
+
+	rbsp_bit(&rbsp, &forbidden_zero_bit);
+	rbsp_bits(&rbsp, 2, &nal_ref_idc);
+	rbsp_bits(&rbsp, 5, &nal_unit_type);
+
+	nal_h264_write_filler_data(&rbsp);
+
+	rbsp_trailing_bits(&rbsp);
+
+	return DIV_ROUND_UP(rbsp.pos, 8);
+}
+EXPORT_SYMBOL_GPL(nal_h264_write_filler);
+
+/**
+ * nal_h264_read_filler() - Read filler data RBSP
+ * @dev: device pointer
+ * @src: buffer with RBSP data that is read
+ * @n: maximum size of src that shall be read
+ *
+ * Read a filler data RBSP from @src up to a maximum size of @n bytes and
+ * return the size of the filler data in bytes including the marker.
+ *
+ * This function is used to parse filler data and skip the respective bytes in
+ * the RBSP data.
+ *
+ * The RBSP format of the filler data is specified in Rec. ITU-T H.264
+ * (04/2017) 7.3.2.7 Filler data RBSP syntax.
+ *
+ * Return: number of filler data bytes (including marker) or negative error
+ */
+ssize_t nal_h264_read_filler(const struct device *dev, void *src, size_t n)
+{
+	struct rbsp rbsp;
+	unsigned int forbidden_zero_bit;
+	unsigned int nal_ref_idc;
+	unsigned int nal_unit_type;
+
+	if (!src)
+		return -EINVAL;
+
+	rbsp_init(&rbsp, src, n, &read);
+
+	nal_h264_read_start_code_prefix(&rbsp);
+
+	rbsp_bit(&rbsp, &forbidden_zero_bit);
+	rbsp_bits(&rbsp, 2, &nal_ref_idc);
+	rbsp_bits(&rbsp, 5, &nal_unit_type);
+
+	if (rbsp.error)
+		return rbsp.error;
+	if (forbidden_zero_bit != 0 ||
+	    nal_ref_idc != 0 ||
+	    nal_unit_type != FILLER_DATA)
+		return -EINVAL;
+
+	nal_h264_read_filler_data(&rbsp);
+	rbsp_trailing_bits(&rbsp);
+
+	if (rbsp.error)
+		return rbsp.error;
+
+	return DIV_ROUND_UP(rbsp.pos, 8);
+}
+EXPORT_SYMBOL_GPL(nal_h264_read_filler);