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, 655 insertions, 0 deletions

diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
new file mode 100644
index 000000000..6666783e1
--- /dev/null
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -0,0 +1,655 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
+ */
+
+
+#define pr_fmt(fmt)	"[drm-dp] %s: " fmt, __func__
+
+#include <linux/of_platform.h>
+
+#include <drm/display/drm_dp_helper.h>
+#include <drm/drm_edid.h>
+
+#include "dp_catalog.h"
+#include "dp_audio.h"
+#include "dp_panel.h"
+#include "dp_display.h"
+
+#define HEADER_BYTE_2_BIT	 0
+#define PARITY_BYTE_2_BIT	 8
+#define HEADER_BYTE_1_BIT	16
+#define PARITY_BYTE_1_BIT	24
+#define HEADER_BYTE_3_BIT	16
+#define PARITY_BYTE_3_BIT	24
+
+struct dp_audio_private {
+	struct platform_device *audio_pdev;
+	struct platform_device *pdev;
+	struct drm_device *drm_dev;
+	struct dp_catalog *catalog;
+	struct dp_panel *panel;
+
+	bool engine_on;
+	u32 channels;
+
+	struct dp_audio dp_audio;
+};
+
+static u8 dp_audio_get_g0_value(u8 data)
+{
+	u8 c[4];
+	u8 g[4];
+	u8 ret_data = 0;
+	u8 i;
+
+	for (i = 0; i < 4; i++)
+		c[i] = (data >> i) & 0x01;
+
+	g[0] = c[3];
+	g[1] = c[0] ^ c[3];
+	g[2] = c[1];
+	g[3] = c[2];
+
+	for (i = 0; i < 4; i++)
+		ret_data = ((g[i] & 0x01) << i) | ret_data;
+
+	return ret_data;
+}
+
+static u8 dp_audio_get_g1_value(u8 data)
+{
+	u8 c[4];
+	u8 g[4];
+	u8 ret_data = 0;
+	u8 i;
+
+	for (i = 0; i < 4; i++)
+		c[i] = (data >> i) & 0x01;
+
+	g[0] = c[0] ^ c[3];
+	g[1] = c[0] ^ c[1] ^ c[3];
+	g[2] = c[1] ^ c[2];
+	g[3] = c[2] ^ c[3];
+
+	for (i = 0; i < 4; i++)
+		ret_data = ((g[i] & 0x01) << i) | ret_data;
+
+	return ret_data;
+}
+
+static u8 dp_audio_calculate_parity(u32 data)
+{
+	u8 x0 = 0;
+	u8 x1 = 0;
+	u8 ci = 0;
+	u8 iData = 0;
+	u8 i = 0;
+	u8 parity_byte;
+	u8 num_byte = (data & 0xFF00) > 0 ? 8 : 2;
+
+	for (i = 0; i < num_byte; i++) {
+		iData = (data >> i*4) & 0xF;
+
+		ci = iData ^ x1;
+		x1 = x0 ^ dp_audio_get_g1_value(ci);
+		x0 = dp_audio_get_g0_value(ci);
+	}
+
+	parity_byte = x1 | (x0 << 4);
+
+	return parity_byte;
+}
+
+static u32 dp_audio_get_header(struct dp_catalog *catalog,
+		enum dp_catalog_audio_sdp_type sdp,
+		enum dp_catalog_audio_header_type header)
+{
+	catalog->sdp_type = sdp;
+	catalog->sdp_header = header;
+	dp_catalog_audio_get_header(catalog);
+
+	return catalog->audio_data;
+}
+
+static void dp_audio_set_header(struct dp_catalog *catalog,
+		u32 data,
+		enum dp_catalog_audio_sdp_type sdp,
+		enum dp_catalog_audio_header_type header)
+{
+	catalog->sdp_type = sdp;
+	catalog->sdp_header = header;
+	catalog->audio_data = data;
+	dp_catalog_audio_set_header(catalog);
+}
+
+static void dp_audio_stream_sdp(struct dp_audio_private *audio)
+{
+	struct dp_catalog *catalog = audio->catalog;
+	u32 value, new_value;
+	u8 parity_byte;
+
+	/* Config header and parity byte 1 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1);
+
+	new_value = 0x02;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_1_BIT)
+			| (parity_byte << PARITY_BYTE_1_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1);
+
+	/* Config header and parity byte 2 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2);
+	new_value = value;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_2_BIT)
+			| (parity_byte << PARITY_BYTE_2_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2);
+
+	/* Config header and parity byte 3 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3);
+
+	new_value = audio->channels - 1;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_3_BIT)
+			| (parity_byte << PARITY_BYTE_3_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+		value, parity_byte);
+
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_timestamp_sdp(struct dp_audio_private *audio)
+{
+	struct dp_catalog *catalog = audio->catalog;
+	u32 value, new_value;
+	u8 parity_byte;
+
+	/* Config header and parity byte 1 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1);
+
+	new_value = 0x1;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_1_BIT)
+			| (parity_byte << PARITY_BYTE_1_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1);
+
+	/* Config header and parity byte 2 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2);
+
+	new_value = 0x17;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_2_BIT)
+			| (parity_byte << PARITY_BYTE_2_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2);
+
+	/* Config header and parity byte 3 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3);
+
+	new_value = (0x0 | (0x11 << 2));
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_3_BIT)
+			| (parity_byte << PARITY_BYTE_3_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_infoframe_sdp(struct dp_audio_private *audio)
+{
+	struct dp_catalog *catalog = audio->catalog;
+	u32 value, new_value;
+	u8 parity_byte;
+
+	/* Config header and parity byte 1 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1);
+
+	new_value = 0x84;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_1_BIT)
+			| (parity_byte << PARITY_BYTE_1_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1);
+
+	/* Config header and parity byte 2 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2);
+
+	new_value = 0x1b;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_2_BIT)
+			| (parity_byte << PARITY_BYTE_2_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2);
+
+	/* Config header and parity byte 3 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3);
+
+	new_value = (0x0 | (0x11 << 2));
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_3_BIT)
+			| (parity_byte << PARITY_BYTE_3_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+			new_value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_copy_management_sdp(struct dp_audio_private *audio)
+{
+	struct dp_catalog *catalog = audio->catalog;
+	u32 value, new_value;
+	u8 parity_byte;
+
+	/* Config header and parity byte 1 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1);
+
+	new_value = 0x05;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_1_BIT)
+			| (parity_byte << PARITY_BYTE_1_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1);
+
+	/* Config header and parity byte 2 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2);
+
+	new_value = 0x0F;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_2_BIT)
+			| (parity_byte << PARITY_BYTE_2_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2);
+
+	/* Config header and parity byte 3 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3);
+
+	new_value = 0x0;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_3_BIT)
+			| (parity_byte << PARITY_BYTE_3_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3);
+}
+
+static void dp_audio_isrc_sdp(struct dp_audio_private *audio)
+{
+	struct dp_catalog *catalog = audio->catalog;
+	u32 value, new_value;
+	u8 parity_byte;
+
+	/* Config header and parity byte 1 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1);
+
+	new_value = 0x06;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_1_BIT)
+			| (parity_byte << PARITY_BYTE_1_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1);
+
+	/* Config header and parity byte 2 */
+	value = dp_audio_get_header(catalog,
+			DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2);
+
+	new_value = 0x0F;
+	parity_byte = dp_audio_calculate_parity(new_value);
+	value |= ((new_value << HEADER_BYTE_2_BIT)
+			| (parity_byte << PARITY_BYTE_2_BIT));
+	drm_dbg_dp(audio->drm_dev,
+			"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
+			value, parity_byte);
+	dp_audio_set_header(catalog, value,
+		DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2);
+}
+
+static void dp_audio_setup_sdp(struct dp_audio_private *audio)
+{
+	dp_catalog_audio_config_sdp(audio->catalog);
+
+	dp_audio_stream_sdp(audio);
+	dp_audio_timestamp_sdp(audio);
+	dp_audio_infoframe_sdp(audio);
+	dp_audio_copy_management_sdp(audio);
+	dp_audio_isrc_sdp(audio);
+}
+
+static void dp_audio_setup_acr(struct dp_audio_private *audio)
+{
+	u32 select = 0;
+	struct dp_catalog *catalog = audio->catalog;
+
+	switch (audio->dp_audio.bw_code) {
+	case DP_LINK_BW_1_62:
+		select = 0;
+		break;
+	case DP_LINK_BW_2_7:
+		select = 1;
+		break;
+	case DP_LINK_BW_5_4:
+		select = 2;
+		break;
+	case DP_LINK_BW_8_1:
+		select = 3;
+		break;
+	default:
+		drm_dbg_dp(audio->drm_dev, "Unknown link rate\n");
+		select = 0;
+		break;
+	}
+
+	catalog->audio_data = select;
+	dp_catalog_audio_config_acr(catalog);
+}
+
+static void dp_audio_safe_to_exit_level(struct dp_audio_private *audio)
+{
+	struct dp_catalog *catalog = audio->catalog;
+	u32 safe_to_exit_level = 0;
+
+	switch (audio->dp_audio.lane_count) {
+	case 1:
+		safe_to_exit_level = 14;
+		break;
+	case 2:
+		safe_to_exit_level = 8;
+		break;
+	case 4:
+		safe_to_exit_level = 5;
+		break;
+	default:
+		drm_dbg_dp(audio->drm_dev,
+				"setting the default safe_to_exit_level = %u\n",
+				safe_to_exit_level);
+		safe_to_exit_level = 14;
+		break;
+	}
+
+	catalog->audio_data = safe_to_exit_level;
+	dp_catalog_audio_sfe_level(catalog);
+}
+
+static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
+{
+	struct dp_catalog *catalog = audio->catalog;
+
+	catalog->audio_data = enable;
+	dp_catalog_audio_enable(catalog);
+
+	audio->engine_on = enable;
+}
+
+static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
+{
+	struct dp_audio *dp_audio;
+	struct msm_dp *dp_display;
+
+	if (!pdev) {
+		DRM_ERROR("invalid input\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	dp_display = platform_get_drvdata(pdev);
+	if (!dp_display) {
+		DRM_ERROR("invalid input\n");
+		return ERR_PTR(-ENODEV);
+	}
+
+	dp_audio = dp_display->dp_audio;
+
+	if (!dp_audio) {
+		DRM_ERROR("invalid dp_audio data\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	return container_of(dp_audio, struct dp_audio_private, dp_audio);
+}
+
+static int dp_audio_hook_plugged_cb(struct device *dev, void *data,
+		hdmi_codec_plugged_cb fn,
+		struct device *codec_dev)
+{
+
+	struct platform_device *pdev;
+	struct msm_dp *dp_display;
+
+	pdev = to_platform_device(dev);
+	if (!pdev) {
+		pr_err("invalid input\n");
+		return -ENODEV;
+	}
+
+	dp_display = platform_get_drvdata(pdev);
+	if (!dp_display) {
+		pr_err("invalid input\n");
+		return -ENODEV;
+	}
+
+	return dp_display_set_plugged_cb(dp_display, fn, codec_dev);
+}
+
+static int dp_audio_get_eld(struct device *dev,
+	void *data, uint8_t *buf, size_t len)
+{
+	struct platform_device *pdev;
+	struct msm_dp *dp_display;
+
+	pdev = to_platform_device(dev);
+
+	if (!pdev) {
+		DRM_ERROR("invalid input\n");
+		return -ENODEV;
+	}
+
+	dp_display = platform_get_drvdata(pdev);
+	if (!dp_display) {
+		DRM_ERROR("invalid input\n");
+		return -ENODEV;
+	}
+
+	memcpy(buf, dp_display->connector->eld,
+		min(sizeof(dp_display->connector->eld), len));
+
+	return 0;
+}
+
+int dp_audio_hw_params(struct device *dev,
+	void *data,
+	struct hdmi_codec_daifmt *daifmt,
+	struct hdmi_codec_params *params)
+{
+	int rc = 0;
+	struct dp_audio_private *audio;
+	struct platform_device *pdev;
+	struct msm_dp *dp_display;
+
+	pdev = to_platform_device(dev);
+	dp_display = platform_get_drvdata(pdev);
+
+	/*
+	 * there could be cases where sound card can be opened even
+	 * before OR even when DP is not connected . This can cause
+	 * unclocked access as the audio subsystem relies on the DP
+	 * driver to maintain the correct state of clocks. To protect
+	 * such cases check for connection status and bail out if not
+	 * connected.
+	 */
+	if (!dp_display->power_on) {
+		rc = -EINVAL;
+		goto end;
+	}
+
+	audio = dp_audio_get_data(pdev);
+	if (IS_ERR(audio)) {
+		rc = PTR_ERR(audio);
+		goto end;
+	}
+
+	audio->channels = params->channels;
+
+	dp_audio_setup_sdp(audio);
+	dp_audio_setup_acr(audio);
+	dp_audio_safe_to_exit_level(audio);
+	dp_audio_enable(audio, true);
+	dp_display_signal_audio_start(dp_display);
+	dp_display->audio_enabled = true;
+
+end:
+	return rc;
+}
+
+static void dp_audio_shutdown(struct device *dev, void *data)
+{
+	struct dp_audio_private *audio;
+	struct platform_device *pdev;
+	struct msm_dp *dp_display;
+
+	pdev = to_platform_device(dev);
+	dp_display = platform_get_drvdata(pdev);
+	audio = dp_audio_get_data(pdev);
+	if (IS_ERR(audio)) {
+		DRM_ERROR("failed to get audio data\n");
+		return;
+	}
+
+	/*
+	 * if audio was not enabled there is no need
+	 * to execute the shutdown and we can bail out early.
+	 * This also makes sure that we dont cause an unclocked
+	 * access when audio subsystem calls this without DP being
+	 * connected. is_connected cannot be used here as its set
+	 * to false earlier than this call
+	 */
+	if (!dp_display->audio_enabled)
+		return;
+
+	dp_audio_enable(audio, false);
+	/* signal the dp display to safely shutdown clocks */
+	dp_display_signal_audio_complete(dp_display);
+}
+
+static const struct hdmi_codec_ops dp_audio_codec_ops = {
+	.hw_params = dp_audio_hw_params,
+	.audio_shutdown = dp_audio_shutdown,
+	.get_eld = dp_audio_get_eld,
+	.hook_plugged_cb = dp_audio_hook_plugged_cb,
+};
+
+static struct hdmi_codec_pdata codec_data = {
+	.ops = &dp_audio_codec_ops,
+	.max_i2s_channels = 8,
+	.i2s = 1,
+};
+
+int dp_register_audio_driver(struct device *dev,
+		struct dp_audio *dp_audio)
+{
+	struct dp_audio_private *audio_priv;
+
+	audio_priv = container_of(dp_audio,
+			struct dp_audio_private, dp_audio);
+
+	audio_priv->audio_pdev = platform_device_register_data(dev,
+						HDMI_CODEC_DRV_NAME,
+						PLATFORM_DEVID_AUTO,
+						&codec_data,
+						sizeof(codec_data));
+	return PTR_ERR_OR_ZERO(audio_priv->audio_pdev);
+}
+
+struct dp_audio *dp_audio_get(struct platform_device *pdev,
+			struct dp_panel *panel,
+			struct dp_catalog *catalog)
+{
+	int rc = 0;
+	struct dp_audio_private *audio;
+	struct dp_audio *dp_audio;
+
+	if (!pdev || !panel || !catalog) {
+		DRM_ERROR("invalid input\n");
+		rc = -EINVAL;
+		goto error;
+	}
+
+	audio = devm_kzalloc(&pdev->dev, sizeof(*audio), GFP_KERNEL);
+	if (!audio) {
+		rc = -ENOMEM;
+		goto error;
+	}
+
+	audio->pdev = pdev;
+	audio->panel = panel;
+	audio->catalog = catalog;
+
+	dp_audio = &audio->dp_audio;
+
+	dp_catalog_audio_init(catalog);
+
+	return dp_audio;
+error:
+	return ERR_PTR(rc);
+}
+
+void dp_audio_put(struct dp_audio *dp_audio)
+{
+	struct dp_audio_private *audio;
+
+	if (!dp_audio)
+		return;
+
+	audio = container_of(dp_audio, struct dp_audio_private, dp_audio);
+
+	devm_kfree(&audio->pdev->dev, audio);
+}