From 5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Tue, 21 Feb 2023 18:24:12 -0800 Subject: Merge tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next Pull networking updates from Jakub Kicinski: "Core: - Add dedicated kmem_cache for typical/small skb->head, avoid having to access struct page at kfree time, and improve memory use. - Introduce sysctl to set default RPS configuration for new netdevs. - Define Netlink protocol specification format which can be used to describe messages used by each family and auto-generate parsers. Add tools for generating kernel data structures and uAPI headers. - Expose all net/core sysctls inside netns. - Remove 4s sleep in netpoll if carrier is instantly detected on boot. - Add configurable limit of MDB entries per port, and port-vlan. - Continue populating drop reasons throughout the stack. - Retire a handful of legacy Qdiscs and classifiers. Protocols: - Support IPv4 big TCP (TSO frames larger than 64kB). - Add IP_LOCAL_PORT_RANGE socket option, to control local port range on socket by socket basis. - Track and report in procfs number of MPTCP sockets used. - Support mixing IPv4 and IPv6 flows in the in-kernel MPTCP path manager. - IPv6: don't check net.ipv6.route.max_size and rely on garbage collection to free memory (similarly to IPv4). - Support Penultimate Segment Pop (PSP) flavor in SRv6 (RFC8986). - ICMP: add per-rate limit counters. - Add support for user scanning requests in ieee802154. - Remove static WEP support. - Support minimal Wi-Fi 7 Extremely High Throughput (EHT) rate reporting. - WiFi 7 EHT channel puncturing support (client & AP). BPF: - Add a rbtree data structure following the "next-gen data structure" precedent set by recently added linked list, that is, by using kfunc + kptr instead of adding a new BPF map type. - Expose XDP hints via kfuncs with initial support for RX hash and timestamp metadata. - Add BPF_F_NO_TUNNEL_KEY extension to bpf_skb_set_tunnel_key to better support decap on GRE tunnel devices not operating in collect metadata. - Improve x86 JIT's codegen for PROBE_MEM runtime error checks. - Remove the need for trace_printk_lock for bpf_trace_printk and bpf_trace_vprintk helpers. - Extend libbpf's bpf_tracing.h support for tracing arguments of kprobes/uprobes and syscall as a special case. - Significantly reduce the search time for module symbols by livepatch and BPF. - Enable cpumasks to be used as kptrs, which is useful for tracing programs tracking which tasks end up running on which CPUs in different time intervals. - Add support for BPF trampoline on s390x and riscv64. - Add capability to export the XDP features supported by the NIC. - Add __bpf_kfunc tag for marking kernel functions as kfuncs. - Add cgroup.memory=nobpf kernel parameter option to disable BPF memory accounting for container environments. Netfilter: - Remove the CLUSTERIP target. It has been marked as obsolete for years, and we still have WARN splats wrt races of the out-of-band /proc interface installed by this target. - Add 'destroy' commands to nf_tables. They are identical to the existing 'delete' commands, but do not return an error if the referenced object (set, chain, rule...) did not exist. Driver API: - Improve cpumask_local_spread() locality to help NICs set the right IRQ affinity on AMD platforms. - Separate C22 and C45 MDIO bus transactions more clearly. - Introduce new DCB table to control DSCP rewrite on egress. - Support configuration of Physical Layer Collision Avoidance (PLCA) Reconciliation Sublayer (RS) (802.3cg-2019). Modern version of shared medium Ethernet. - Support for MAC Merge layer (IEEE 802.3-2018 clause 99). Allowing preemption of low priority frames by high priority frames. - Add support for controlling MACSec offload using netlink SET. - Rework devlink instance refcounts to allow registration and de-registration under the instance lock. Split the code into multiple files, drop some of the unnecessarily granular locks and factor out common parts of netlink operation handling. - Add TX frame aggregation parameters (for USB drivers). - Add a new attr TCA_EXT_WARN_MSG to report TC (offload) warning messages with notifications for debug. - Allow offloading of UDP NEW connections via act_ct. - Add support for per action HW stats in TC. - Support hardware miss to TC action (continue processing in SW from a specific point in the action chain). - Warn if old Wireless Extension user space interface is used with modern cfg80211/mac80211 drivers. Do not support Wireless Extensions for Wi-Fi 7 devices at all. Everyone should switch to using nl80211 interface instead. - Improve the CAN bit timing configuration. Use extack to return error messages directly to user space, update the SJW handling, including the definition of a new default value that will benefit CAN-FD controllers, by increasing their oscillator tolerance. New hardware / drivers: - Ethernet: - nVidia BlueField-3 support (control traffic driver) - Ethernet support for imx93 SoCs - Motorcomm yt8531 gigabit Ethernet PHY - onsemi NCN26000 10BASE-T1S PHY (with support for PLCA) - Microchip LAN8841 PHY (incl. cable diagnostics and PTP) - Amlogic gxl MDIO mux - WiFi: - RealTek RTL8188EU (rtl8xxxu) - Qualcomm Wi-Fi 7 devices (ath12k) - CAN: - Renesas R-Car V4H Drivers: - Bluetooth: - Set Per Platform Antenna Gain (PPAG) for Intel controllers. - Ethernet NICs: - Intel (1G, igc): - support TSN / Qbv / packet scheduling features of i226 model - Intel (100G, ice): - use GNSS subsystem instead of TTY - multi-buffer XDP support - extend support for GPIO pins to E823 devices - nVidia/Mellanox: - update the shared buffer configuration on PFC commands - implement PTP adjphase function for HW offset control - TC support for Geneve and GRE with VF tunnel offload - more efficient crypto key management method - multi-port eswitch support - Netronome/Corigine: - add DCB IEEE support - support IPsec offloading for NFP3800 - Freescale/NXP (enetc): - support XDP_REDIRECT for XDP non-linear buffers - improve reconfig, avoid link flap and waiting for idle - support MAC Merge layer - Other NICs: - sfc/ef100: add basic devlink support for ef100 - ionic: rx_push mode operation (writing descriptors via MMIO) - bnxt: use the auxiliary bus abstraction for RDMA - r8169: disable ASPM and reset bus in case of tx timeout - cpsw: support QSGMII mode for J721e CPSW9G - cpts: support pulse-per-second output - ngbe: add an mdio bus driver - usbnet: optimize usbnet_bh() by avoiding unnecessary queuing - r8152: handle devices with FW with NCM support - amd-xgbe: support 10Mbps, 2.5GbE speeds and rx-adaptation - virtio-net: support multi buffer XDP - virtio/vsock: replace virtio_vsock_pkt with sk_buff - tsnep: XDP support - Ethernet high-speed switches: - nVidia/Mellanox (mlxsw): - add support for latency TLV (in FW control messages) - Microchip (sparx5): - separate explicit and implicit traffic forwarding rules, make the implicit rules always active - add support for egress DSCP rewrite - IS0 VCAP support (Ingress Classification) - IS2 VCAP filters (protos, L3 addrs, L4 ports, flags, ToS etc.) - ES2 VCAP support (Egress Access Control) - support for Per-Stream Filtering and Policing (802.1Q, 8.6.5.1) - Ethernet embedded switches: - Marvell (mv88e6xxx): - add MAB (port auth) offload support - enable PTP receive for mv88e6390 - NXP (ocelot): - support MAC Merge layer - support for the the vsc7512 internal copper phys - Microchip: - lan9303: convert to PHYLINK - lan966x: support TC flower filter statistics - lan937x: PTP support for KSZ9563/KSZ8563 and LAN937x - lan937x: support Credit Based Shaper configuration - ksz9477: support Energy Efficient Ethernet - other: - qca8k: convert to regmap read/write API, use bulk operations - rswitch: Improve TX timestamp accuracy - Intel WiFi (iwlwifi): - EHT (Wi-Fi 7) rate reporting - STEP equalizer support: transfer some STEP (connection to radio on platforms with integrated wifi) related parameters from the BIOS to the firmware. - Qualcomm 802.11ax WiFi (ath11k): - IPQ5018 support - Fine Timing Measurement (FTM) responder role support - channel 177 support - MediaTek WiFi (mt76): - per-PHY LED support - mt7996: EHT (Wi-Fi 7) support - Wireless Ethernet Dispatch (WED) reset support - switch to using page pool allocator - RealTek WiFi (rtw89): - support new version of Bluetooth co-existance - Mobile: - rmnet: support TX aggregation" * tag 'net-next-6.3' of git://git.kernel.org/pub/scm/linux/kernel/git/netdev/net-next: (1872 commits) page_pool: add a comment explaining the fragment counter usage net: ethtool: fix __ethtool_dev_mm_supported() implementation ethtool: pse-pd: Fix double word in comments xsk: add linux/vmalloc.h to xsk.c sefltests: netdevsim: wait for devlink instance after netns removal selftest: fib_tests: Always cleanup before exit net/mlx5e: Align IPsec ASO result memory to be as required by hardware net/mlx5e: TC, Set CT miss to the specific ct action instance net/mlx5e: Rename CHAIN_TO_REG to MAPPED_OBJ_TO_REG net/mlx5: Refactor tc miss handling to a single function net/mlx5: Kconfig: Make tc offload depend on tc skb extension net/sched: flower: Support hardware miss to tc action net/sched: flower: Move filter handle initialization earlier net/sched: cls_api: Support hardware miss to tc action net/sched: Rename user cookie and act cookie sfc: fix builds without CONFIG_RTC_LIB sfc: clean up some inconsistent indentings net/mlx4_en: Introduce flexible array to silence overflow warning net: lan966x: Fix possible deadlock inside PTP net/ulp: Remove redundant ->clone() test in inet_clone_ulp(). ... --- drivers/gpu/drm/msm/hdmi/hdmi_i2c.c | 267 ++++++++++++++++++++++++++++++++++++ 1 file changed, 267 insertions(+) create mode 100644 drivers/gpu/drm/msm/hdmi/hdmi_i2c.c (limited to 'drivers/gpu/drm/msm/hdmi/hdmi_i2c.c') diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c b/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c new file mode 100644 index 000000000..de182c004 --- /dev/null +++ b/drivers/gpu/drm/msm/hdmi/hdmi_i2c.c @@ -0,0 +1,267 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2013 Red Hat + * Author: Rob Clark + */ + +#include "hdmi.h" + +struct hdmi_i2c_adapter { + struct i2c_adapter base; + struct hdmi *hdmi; + bool sw_done; + wait_queue_head_t ddc_event; +}; +#define to_hdmi_i2c_adapter(x) container_of(x, struct hdmi_i2c_adapter, base) + +static void init_ddc(struct hdmi_i2c_adapter *hdmi_i2c) +{ + struct hdmi *hdmi = hdmi_i2c->hdmi; + + hdmi_write(hdmi, REG_HDMI_DDC_CTRL, + HDMI_DDC_CTRL_SW_STATUS_RESET); + hdmi_write(hdmi, REG_HDMI_DDC_CTRL, + HDMI_DDC_CTRL_SOFT_RESET); + + hdmi_write(hdmi, REG_HDMI_DDC_SPEED, + HDMI_DDC_SPEED_THRESHOLD(2) | + HDMI_DDC_SPEED_PRESCALE(10)); + + hdmi_write(hdmi, REG_HDMI_DDC_SETUP, + HDMI_DDC_SETUP_TIMEOUT(0xff)); + + /* enable reference timer for 27us */ + hdmi_write(hdmi, REG_HDMI_DDC_REF, + HDMI_DDC_REF_REFTIMER_ENABLE | + HDMI_DDC_REF_REFTIMER(27)); +} + +static int ddc_clear_irq(struct hdmi_i2c_adapter *hdmi_i2c) +{ + struct hdmi *hdmi = hdmi_i2c->hdmi; + struct drm_device *dev = hdmi->dev; + uint32_t retry = 0xffff; + uint32_t ddc_int_ctrl; + + do { + --retry; + + hdmi_write(hdmi, REG_HDMI_DDC_INT_CTRL, + HDMI_DDC_INT_CTRL_SW_DONE_ACK | + HDMI_DDC_INT_CTRL_SW_DONE_MASK); + + ddc_int_ctrl = hdmi_read(hdmi, REG_HDMI_DDC_INT_CTRL); + + } while ((ddc_int_ctrl & HDMI_DDC_INT_CTRL_SW_DONE_INT) && retry); + + if (!retry) { + DRM_DEV_ERROR(dev->dev, "timeout waiting for DDC\n"); + return -ETIMEDOUT; + } + + hdmi_i2c->sw_done = false; + + return 0; +} + +#define MAX_TRANSACTIONS 4 + +static bool sw_done(struct hdmi_i2c_adapter *hdmi_i2c) +{ + struct hdmi *hdmi = hdmi_i2c->hdmi; + + if (!hdmi_i2c->sw_done) { + uint32_t ddc_int_ctrl; + + ddc_int_ctrl = hdmi_read(hdmi, REG_HDMI_DDC_INT_CTRL); + + if ((ddc_int_ctrl & HDMI_DDC_INT_CTRL_SW_DONE_MASK) && + (ddc_int_ctrl & HDMI_DDC_INT_CTRL_SW_DONE_INT)) { + hdmi_i2c->sw_done = true; + hdmi_write(hdmi, REG_HDMI_DDC_INT_CTRL, + HDMI_DDC_INT_CTRL_SW_DONE_ACK); + } + } + + return hdmi_i2c->sw_done; +} + +static int msm_hdmi_i2c_xfer(struct i2c_adapter *i2c, + struct i2c_msg *msgs, int num) +{ + struct hdmi_i2c_adapter *hdmi_i2c = to_hdmi_i2c_adapter(i2c); + struct hdmi *hdmi = hdmi_i2c->hdmi; + struct drm_device *dev = hdmi->dev; + static const uint32_t nack[] = { + HDMI_DDC_SW_STATUS_NACK0, HDMI_DDC_SW_STATUS_NACK1, + HDMI_DDC_SW_STATUS_NACK2, HDMI_DDC_SW_STATUS_NACK3, + }; + int indices[MAX_TRANSACTIONS]; + int ret, i, j, index = 0; + uint32_t ddc_status, ddc_data, i2c_trans; + + num = min(num, MAX_TRANSACTIONS); + + WARN_ON(!(hdmi_read(hdmi, REG_HDMI_CTRL) & HDMI_CTRL_ENABLE)); + + if (num == 0) + return num; + + init_ddc(hdmi_i2c); + + ret = ddc_clear_irq(hdmi_i2c); + if (ret) + return ret; + + for (i = 0; i < num; i++) { + struct i2c_msg *p = &msgs[i]; + uint32_t raw_addr = p->addr << 1; + + if (p->flags & I2C_M_RD) + raw_addr |= 1; + + ddc_data = HDMI_DDC_DATA_DATA(raw_addr) | + HDMI_DDC_DATA_DATA_RW(DDC_WRITE); + + if (i == 0) { + ddc_data |= HDMI_DDC_DATA_INDEX(0) | + HDMI_DDC_DATA_INDEX_WRITE; + } + + hdmi_write(hdmi, REG_HDMI_DDC_DATA, ddc_data); + index++; + + indices[i] = index; + + if (p->flags & I2C_M_RD) { + index += p->len; + } else { + for (j = 0; j < p->len; j++) { + ddc_data = HDMI_DDC_DATA_DATA(p->buf[j]) | + HDMI_DDC_DATA_DATA_RW(DDC_WRITE); + hdmi_write(hdmi, REG_HDMI_DDC_DATA, ddc_data); + index++; + } + } + + i2c_trans = HDMI_I2C_TRANSACTION_REG_CNT(p->len) | + HDMI_I2C_TRANSACTION_REG_RW( + (p->flags & I2C_M_RD) ? DDC_READ : DDC_WRITE) | + HDMI_I2C_TRANSACTION_REG_START; + + if (i == (num - 1)) + i2c_trans |= HDMI_I2C_TRANSACTION_REG_STOP; + + hdmi_write(hdmi, REG_HDMI_I2C_TRANSACTION(i), i2c_trans); + } + + /* trigger the transfer: */ + hdmi_write(hdmi, REG_HDMI_DDC_CTRL, + HDMI_DDC_CTRL_TRANSACTION_CNT(num - 1) | + HDMI_DDC_CTRL_GO); + + ret = wait_event_timeout(hdmi_i2c->ddc_event, sw_done(hdmi_i2c), HZ/4); + if (ret <= 0) { + if (ret == 0) + ret = -ETIMEDOUT; + dev_warn(dev->dev, "DDC timeout: %d\n", ret); + DBG("sw_status=%08x, hw_status=%08x, int_ctrl=%08x", + hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS), + hdmi_read(hdmi, REG_HDMI_DDC_HW_STATUS), + hdmi_read(hdmi, REG_HDMI_DDC_INT_CTRL)); + return ret; + } + + ddc_status = hdmi_read(hdmi, REG_HDMI_DDC_SW_STATUS); + + /* read back results of any read transactions: */ + for (i = 0; i < num; i++) { + struct i2c_msg *p = &msgs[i]; + + if (!(p->flags & I2C_M_RD)) + continue; + + /* check for NACK: */ + if (ddc_status & nack[i]) { + DBG("ddc_status=%08x", ddc_status); + break; + } + + ddc_data = HDMI_DDC_DATA_DATA_RW(DDC_READ) | + HDMI_DDC_DATA_INDEX(indices[i]) | + HDMI_DDC_DATA_INDEX_WRITE; + + hdmi_write(hdmi, REG_HDMI_DDC_DATA, ddc_data); + + /* discard first byte: */ + hdmi_read(hdmi, REG_HDMI_DDC_DATA); + + for (j = 0; j < p->len; j++) { + ddc_data = hdmi_read(hdmi, REG_HDMI_DDC_DATA); + p->buf[j] = FIELD(ddc_data, HDMI_DDC_DATA_DATA); + } + } + + return i; +} + +static u32 msm_hdmi_i2c_func(struct i2c_adapter *adapter) +{ + return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL; +} + +static const struct i2c_algorithm msm_hdmi_i2c_algorithm = { + .master_xfer = msm_hdmi_i2c_xfer, + .functionality = msm_hdmi_i2c_func, +}; + +void msm_hdmi_i2c_irq(struct i2c_adapter *i2c) +{ + struct hdmi_i2c_adapter *hdmi_i2c = to_hdmi_i2c_adapter(i2c); + + if (sw_done(hdmi_i2c)) + wake_up_all(&hdmi_i2c->ddc_event); +} + +void msm_hdmi_i2c_destroy(struct i2c_adapter *i2c) +{ + struct hdmi_i2c_adapter *hdmi_i2c = to_hdmi_i2c_adapter(i2c); + i2c_del_adapter(i2c); + kfree(hdmi_i2c); +} + +struct i2c_adapter *msm_hdmi_i2c_init(struct hdmi *hdmi) +{ + struct hdmi_i2c_adapter *hdmi_i2c; + struct i2c_adapter *i2c = NULL; + int ret; + + hdmi_i2c = kzalloc(sizeof(*hdmi_i2c), GFP_KERNEL); + if (!hdmi_i2c) { + ret = -ENOMEM; + goto fail; + } + + i2c = &hdmi_i2c->base; + + hdmi_i2c->hdmi = hdmi; + init_waitqueue_head(&hdmi_i2c->ddc_event); + + + i2c->owner = THIS_MODULE; + i2c->class = I2C_CLASS_DDC; + snprintf(i2c->name, sizeof(i2c->name), "msm hdmi i2c"); + i2c->dev.parent = &hdmi->pdev->dev; + i2c->algo = &msm_hdmi_i2c_algorithm; + + ret = i2c_add_adapter(i2c); + if (ret) + goto fail; + + return i2c; + +fail: + if (i2c) + msm_hdmi_i2c_destroy(i2c); + return ERR_PTR(ret); +} -- cgit v1.2.3