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, 317 insertions, 0 deletions

diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
new file mode 100644
index 000000000..c7d7e9fff
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_i2c.c
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Maxime Ripard <maxime.ripard@free-electrons.com>
+ * Copyright (C) 2017 Jonathan Liu <net147@gmail.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/i2c.h>
+#include <linux/iopoll.h>
+
+#include "sun4i_hdmi.h"
+
+#define SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK ( \
+	SUN4I_HDMI_DDC_INT_STATUS_ILLEGAL_FIFO_OPERATION | \
+	SUN4I_HDMI_DDC_INT_STATUS_DDC_RX_FIFO_UNDERFLOW | \
+	SUN4I_HDMI_DDC_INT_STATUS_DDC_TX_FIFO_OVERFLOW | \
+	SUN4I_HDMI_DDC_INT_STATUS_ARBITRATION_ERROR | \
+	SUN4I_HDMI_DDC_INT_STATUS_ACK_ERROR | \
+	SUN4I_HDMI_DDC_INT_STATUS_BUS_ERROR \
+)
+
+/* FIFO request bit is set when FIFO level is above RX_THRESHOLD during read */
+#define RX_THRESHOLD SUN4I_HDMI_DDC_FIFO_CTRL_RX_THRES_MAX
+
+static int fifo_transfer(struct sun4i_hdmi *hdmi, u8 *buf, int len, bool read)
+{
+	/*
+	 * 1 byte takes 9 clock cycles (8 bits + 1 ACK) = 90 us for 100 kHz
+	 * clock. As clock rate is fixed, just round it up to 100 us.
+	 */
+	const unsigned long byte_time_ns = 100;
+	const u32 mask = SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK |
+			 SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST |
+			 SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE;
+	u32 reg;
+	/*
+	 * If threshold is inclusive, then the FIFO may only have
+	 * RX_THRESHOLD number of bytes, instead of RX_THRESHOLD + 1.
+	 */
+	int read_len = RX_THRESHOLD +
+		(hdmi->variant->ddc_fifo_thres_incl ? 0 : 1);
+
+	/*
+	 * Limit transfer length by FIFO threshold or FIFO size.
+	 * For TX the threshold is for an empty FIFO.
+	 */
+	len = min_t(int, len, read ? read_len : SUN4I_HDMI_DDC_FIFO_SIZE);
+
+	/* Wait until error, FIFO request bit set or transfer complete */
+	if (regmap_field_read_poll_timeout(hdmi->field_ddc_int_status, reg,
+					   reg & mask, len * byte_time_ns,
+					   100000))
+		return -ETIMEDOUT;
+
+	if (reg & SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK)
+		return -EIO;
+
+	if (read)
+		ioread8_rep(hdmi->base + hdmi->variant->ddc_fifo_reg, buf, len);
+	else
+		iowrite8_rep(hdmi->base + hdmi->variant->ddc_fifo_reg, buf, len);
+
+	/* Clear FIFO request bit by forcing a write to that bit */
+	regmap_field_force_write(hdmi->field_ddc_int_status,
+				 SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST);
+
+	return len;
+}
+
+static int xfer_msg(struct sun4i_hdmi *hdmi, struct i2c_msg *msg)
+{
+	int i, len;
+	u32 reg;
+
+	/* Set FIFO direction */
+	if (hdmi->variant->ddc_fifo_has_dir) {
+		reg = readl(hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+		reg &= ~SUN4I_HDMI_DDC_CTRL_FIFO_DIR_MASK;
+		reg |= (msg->flags & I2C_M_RD) ?
+		       SUN4I_HDMI_DDC_CTRL_FIFO_DIR_READ :
+		       SUN4I_HDMI_DDC_CTRL_FIFO_DIR_WRITE;
+		writel(reg, hdmi->base + SUN4I_HDMI_DDC_CTRL_REG);
+	}
+
+	/* Clear address register (not cleared by soft reset) */
+	regmap_field_write(hdmi->field_ddc_addr_reg, 0);
+
+	/* Set I2C address */
+	regmap_field_write(hdmi->field_ddc_slave_addr, msg->addr);
+
+	/*
+	 * Set FIFO RX/TX thresholds and clear FIFO
+	 *
+	 * If threshold is inclusive, we can set the TX threshold to
+	 * 0 instead of 1.
+	 */
+	regmap_field_write(hdmi->field_ddc_fifo_tx_thres,
+			   hdmi->variant->ddc_fifo_thres_incl ? 0 : 1);
+	regmap_field_write(hdmi->field_ddc_fifo_rx_thres, RX_THRESHOLD);
+	regmap_field_write(hdmi->field_ddc_fifo_clear, 1);
+	if (regmap_field_read_poll_timeout(hdmi->field_ddc_fifo_clear,
+					   reg, !reg, 100, 2000))
+		return -EIO;
+
+	/* Set transfer length */
+	regmap_field_write(hdmi->field_ddc_byte_count, msg->len);
+
+	/* Set command */
+	regmap_field_write(hdmi->field_ddc_cmd,
+			   msg->flags & I2C_M_RD ?
+			   SUN4I_HDMI_DDC_CMD_IMPLICIT_READ :
+			   SUN4I_HDMI_DDC_CMD_IMPLICIT_WRITE);
+
+	/* Clear interrupt status bits by forcing a write */
+	regmap_field_force_write(hdmi->field_ddc_int_status,
+				 SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK |
+				 SUN4I_HDMI_DDC_INT_STATUS_FIFO_REQUEST |
+				 SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE);
+
+	/* Start command */
+	regmap_field_write(hdmi->field_ddc_start, 1);
+
+	/* Transfer bytes */
+	for (i = 0; i < msg->len; i += len) {
+		len = fifo_transfer(hdmi, msg->buf + i, msg->len - i,
+				    msg->flags & I2C_M_RD);
+		if (len <= 0)
+			return len;
+	}
+
+	/* Wait for command to finish */
+	if (regmap_field_read_poll_timeout(hdmi->field_ddc_start,
+					   reg, !reg, 100, 100000))
+		return -EIO;
+
+	/* Check for errors */
+	regmap_field_read(hdmi->field_ddc_int_status, &reg);
+	if ((reg & SUN4I_HDMI_DDC_INT_STATUS_ERROR_MASK) ||
+	    !(reg & SUN4I_HDMI_DDC_INT_STATUS_TRANSFER_COMPLETE)) {
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int sun4i_hdmi_i2c_xfer(struct i2c_adapter *adap,
+			       struct i2c_msg *msgs, int num)
+{
+	struct sun4i_hdmi *hdmi = i2c_get_adapdata(adap);
+	u32 reg;
+	int err, i, ret = num;
+
+	for (i = 0; i < num; i++) {
+		if (!msgs[i].len)
+			return -EINVAL;
+		if (msgs[i].len > SUN4I_HDMI_DDC_BYTE_COUNT_MAX)
+			return -EINVAL;
+	}
+
+	/* DDC clock needs to be enabled for the module to work */
+	clk_prepare_enable(hdmi->ddc_clk);
+	clk_set_rate(hdmi->ddc_clk, 100000);
+
+	/* Reset I2C controller */
+	regmap_field_write(hdmi->field_ddc_en, 1);
+	regmap_field_write(hdmi->field_ddc_reset, 1);
+	if (regmap_field_read_poll_timeout(hdmi->field_ddc_reset,
+					   reg, !reg, 100, 2000)) {
+		clk_disable_unprepare(hdmi->ddc_clk);
+		return -EIO;
+	}
+
+	regmap_field_write(hdmi->field_ddc_sck_en, 1);
+	regmap_field_write(hdmi->field_ddc_sda_en, 1);
+
+	for (i = 0; i < num; i++) {
+		err = xfer_msg(hdmi, &msgs[i]);
+		if (err) {
+			ret = err;
+			break;
+		}
+	}
+
+	clk_disable_unprepare(hdmi->ddc_clk);
+	return ret;
+}
+
+static u32 sun4i_hdmi_i2c_func(struct i2c_adapter *adap)
+{
+	return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm sun4i_hdmi_i2c_algorithm = {
+	.master_xfer	= sun4i_hdmi_i2c_xfer,
+	.functionality	= sun4i_hdmi_i2c_func,
+};
+
+static int sun4i_hdmi_init_regmap_fields(struct sun4i_hdmi *hdmi)
+{
+	hdmi->field_ddc_en =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_en);
+	if (IS_ERR(hdmi->field_ddc_en))
+		return PTR_ERR(hdmi->field_ddc_en);
+
+	hdmi->field_ddc_start =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_start);
+	if (IS_ERR(hdmi->field_ddc_start))
+		return PTR_ERR(hdmi->field_ddc_start);
+
+	hdmi->field_ddc_reset =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_reset);
+	if (IS_ERR(hdmi->field_ddc_reset))
+		return PTR_ERR(hdmi->field_ddc_reset);
+
+	hdmi->field_ddc_addr_reg =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_addr_reg);
+	if (IS_ERR(hdmi->field_ddc_addr_reg))
+		return PTR_ERR(hdmi->field_ddc_addr_reg);
+
+	hdmi->field_ddc_slave_addr =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_slave_addr);
+	if (IS_ERR(hdmi->field_ddc_slave_addr))
+		return PTR_ERR(hdmi->field_ddc_slave_addr);
+
+	hdmi->field_ddc_int_mask =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_int_mask);
+	if (IS_ERR(hdmi->field_ddc_int_mask))
+		return PTR_ERR(hdmi->field_ddc_int_mask);
+
+	hdmi->field_ddc_int_status =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_int_status);
+	if (IS_ERR(hdmi->field_ddc_int_status))
+		return PTR_ERR(hdmi->field_ddc_int_status);
+
+	hdmi->field_ddc_fifo_clear =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_fifo_clear);
+	if (IS_ERR(hdmi->field_ddc_fifo_clear))
+		return PTR_ERR(hdmi->field_ddc_fifo_clear);
+
+	hdmi->field_ddc_fifo_rx_thres =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_fifo_rx_thres);
+	if (IS_ERR(hdmi->field_ddc_fifo_rx_thres))
+		return PTR_ERR(hdmi->field_ddc_fifo_rx_thres);
+
+	hdmi->field_ddc_fifo_tx_thres =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_fifo_tx_thres);
+	if (IS_ERR(hdmi->field_ddc_fifo_tx_thres))
+		return PTR_ERR(hdmi->field_ddc_fifo_tx_thres);
+
+	hdmi->field_ddc_byte_count =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_byte_count);
+	if (IS_ERR(hdmi->field_ddc_byte_count))
+		return PTR_ERR(hdmi->field_ddc_byte_count);
+
+	hdmi->field_ddc_cmd =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_cmd);
+	if (IS_ERR(hdmi->field_ddc_cmd))
+		return PTR_ERR(hdmi->field_ddc_cmd);
+
+	hdmi->field_ddc_sda_en =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_sda_en);
+	if (IS_ERR(hdmi->field_ddc_sda_en))
+		return PTR_ERR(hdmi->field_ddc_sda_en);
+
+	hdmi->field_ddc_sck_en =
+		devm_regmap_field_alloc(hdmi->dev, hdmi->regmap,
+					hdmi->variant->field_ddc_sck_en);
+	if (IS_ERR(hdmi->field_ddc_sck_en))
+		return PTR_ERR(hdmi->field_ddc_sck_en);
+
+	return 0;
+}
+
+int sun4i_hdmi_i2c_create(struct device *dev, struct sun4i_hdmi *hdmi)
+{
+	struct i2c_adapter *adap;
+	int ret = 0;
+
+	ret = sun4i_ddc_create(hdmi, hdmi->ddc_parent_clk);
+	if (ret)
+		return ret;
+
+	ret = sun4i_hdmi_init_regmap_fields(hdmi);
+	if (ret)
+		return ret;
+
+	adap = devm_kzalloc(dev, sizeof(*adap), GFP_KERNEL);
+	if (!adap)
+		return -ENOMEM;
+
+	adap->owner = THIS_MODULE;
+	adap->class = I2C_CLASS_DDC;
+	adap->algo = &sun4i_hdmi_i2c_algorithm;
+	strlcpy(adap->name, "sun4i_hdmi_i2c adapter", sizeof(adap->name));
+	i2c_set_adapdata(adap, hdmi);
+
+	ret = i2c_add_adapter(adap);
+	if (ret)
+		return ret;
+
+	hdmi->i2c = adap;
+
+	return ret;
+}