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authorLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
committerLibravatar Linus Torvalds <torvalds@linux-foundation.org>2023-02-21 18:24:12 -0800
commit5b7c4cabbb65f5c469464da6c5f614cbd7f730f2 (patch)
treecc5c2d0a898769fd59549594fedb3ee6f84e59a0 /drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
downloadlinux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.tar.gz
linux-5b7c4cabbb65f5c469464da6c5f614cbd7f730f2.zip
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(). ...
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c')
-rw-r--r--drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c351
1 files changed, 351 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c b/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
new file mode 100644
index 000000000..6207eac88
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_hdmi_ddc.c
@@ -0,0 +1,351 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014 MediaTek Inc.
+ * Author: Jie Qiu <jie.qiu@mediatek.com>
+ */
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/time.h>
+#include <linux/delay.h>
+#include <linux/errno.h>
+#include <linux/err.h>
+#include <linux/platform_device.h>
+#include <linux/clk.h>
+#include <linux/slab.h>
+#include <linux/io.h>
+#include <linux/iopoll.h>
+#include <linux/of_address.h>
+#include <linux/of_irq.h>
+#include <linux/of_platform.h>
+
+#define SIF1_CLOK (288)
+#define DDC_DDCMCTL0 (0x0)
+#define DDCM_ODRAIN BIT(31)
+#define DDCM_CLK_DIV_OFFSET (16)
+#define DDCM_CLK_DIV_MASK (0xfff << 16)
+#define DDCM_CS_STATUS BIT(4)
+#define DDCM_SCL_STATE BIT(3)
+#define DDCM_SDA_STATE BIT(2)
+#define DDCM_SM0EN BIT(1)
+#define DDCM_SCL_STRECH BIT(0)
+#define DDC_DDCMCTL1 (0x4)
+#define DDCM_ACK_OFFSET (16)
+#define DDCM_ACK_MASK (0xff << 16)
+#define DDCM_PGLEN_OFFSET (8)
+#define DDCM_PGLEN_MASK (0x7 << 8)
+#define DDCM_SIF_MODE_OFFSET (4)
+#define DDCM_SIF_MODE_MASK (0x7 << 4)
+#define DDCM_START (0x1)
+#define DDCM_WRITE_DATA (0x2)
+#define DDCM_STOP (0x3)
+#define DDCM_READ_DATA_NO_ACK (0x4)
+#define DDCM_READ_DATA_ACK (0x5)
+#define DDCM_TRI BIT(0)
+#define DDC_DDCMD0 (0x8)
+#define DDCM_DATA3 (0xff << 24)
+#define DDCM_DATA2 (0xff << 16)
+#define DDCM_DATA1 (0xff << 8)
+#define DDCM_DATA0 (0xff << 0)
+#define DDC_DDCMD1 (0xc)
+#define DDCM_DATA7 (0xff << 24)
+#define DDCM_DATA6 (0xff << 16)
+#define DDCM_DATA5 (0xff << 8)
+#define DDCM_DATA4 (0xff << 0)
+
+struct mtk_hdmi_ddc {
+ struct i2c_adapter adap;
+ struct clk *clk;
+ void __iomem *regs;
+};
+
+static inline void sif_set_bit(struct mtk_hdmi_ddc *ddc, unsigned int offset,
+ unsigned int val)
+{
+ writel(readl(ddc->regs + offset) | val, ddc->regs + offset);
+}
+
+static inline void sif_clr_bit(struct mtk_hdmi_ddc *ddc, unsigned int offset,
+ unsigned int val)
+{
+ writel(readl(ddc->regs + offset) & ~val, ddc->regs + offset);
+}
+
+static inline bool sif_bit_is_set(struct mtk_hdmi_ddc *ddc, unsigned int offset,
+ unsigned int val)
+{
+ return (readl(ddc->regs + offset) & val) == val;
+}
+
+static inline void sif_write_mask(struct mtk_hdmi_ddc *ddc, unsigned int offset,
+ unsigned int mask, unsigned int shift,
+ unsigned int val)
+{
+ unsigned int tmp;
+
+ tmp = readl(ddc->regs + offset);
+ tmp &= ~mask;
+ tmp |= (val << shift) & mask;
+ writel(tmp, ddc->regs + offset);
+}
+
+static inline unsigned int sif_read_mask(struct mtk_hdmi_ddc *ddc,
+ unsigned int offset, unsigned int mask,
+ unsigned int shift)
+{
+ return (readl(ddc->regs + offset) & mask) >> shift;
+}
+
+static void ddcm_trigger_mode(struct mtk_hdmi_ddc *ddc, int mode)
+{
+ u32 val;
+
+ sif_write_mask(ddc, DDC_DDCMCTL1, DDCM_SIF_MODE_MASK,
+ DDCM_SIF_MODE_OFFSET, mode);
+ sif_set_bit(ddc, DDC_DDCMCTL1, DDCM_TRI);
+ readl_poll_timeout(ddc->regs + DDC_DDCMCTL1, val,
+ (val & DDCM_TRI) != DDCM_TRI, 4, 20000);
+}
+
+static int mtk_hdmi_ddc_read_msg(struct mtk_hdmi_ddc *ddc, struct i2c_msg *msg)
+{
+ struct device *dev = ddc->adap.dev.parent;
+ u32 remain_count, ack_count, ack_final, read_count, temp_count;
+ u32 index = 0;
+ u32 ack;
+ int i;
+
+ ddcm_trigger_mode(ddc, DDCM_START);
+ sif_write_mask(ddc, DDC_DDCMD0, 0xff, 0, (msg->addr << 1) | 0x01);
+ sif_write_mask(ddc, DDC_DDCMCTL1, DDCM_PGLEN_MASK, DDCM_PGLEN_OFFSET,
+ 0x00);
+ ddcm_trigger_mode(ddc, DDCM_WRITE_DATA);
+ ack = sif_read_mask(ddc, DDC_DDCMCTL1, DDCM_ACK_MASK, DDCM_ACK_OFFSET);
+ dev_dbg(dev, "ack = 0x%x\n", ack);
+ if (ack != 0x01) {
+ dev_err(dev, "i2c ack err!\n");
+ return -ENXIO;
+ }
+
+ remain_count = msg->len;
+ ack_count = (msg->len - 1) / 8;
+ ack_final = 0;
+
+ while (remain_count > 0) {
+ if (ack_count > 0) {
+ read_count = 8;
+ ack_final = 0;
+ ack_count--;
+ } else {
+ read_count = remain_count;
+ ack_final = 1;
+ }
+
+ sif_write_mask(ddc, DDC_DDCMCTL1, DDCM_PGLEN_MASK,
+ DDCM_PGLEN_OFFSET, read_count - 1);
+ ddcm_trigger_mode(ddc, (ack_final == 1) ?
+ DDCM_READ_DATA_NO_ACK :
+ DDCM_READ_DATA_ACK);
+
+ ack = sif_read_mask(ddc, DDC_DDCMCTL1, DDCM_ACK_MASK,
+ DDCM_ACK_OFFSET);
+ temp_count = 0;
+ while (((ack & (1 << temp_count)) != 0) && (temp_count < 8))
+ temp_count++;
+ if (((ack_final == 1) && (temp_count != (read_count - 1))) ||
+ ((ack_final == 0) && (temp_count != read_count))) {
+ dev_err(dev, "Address NACK! ACK(0x%x)\n", ack);
+ break;
+ }
+
+ for (i = read_count; i >= 1; i--) {
+ int shift;
+ int offset;
+
+ if (i > 4) {
+ offset = DDC_DDCMD1;
+ shift = (i - 5) * 8;
+ } else {
+ offset = DDC_DDCMD0;
+ shift = (i - 1) * 8;
+ }
+
+ msg->buf[index + i - 1] = sif_read_mask(ddc, offset,
+ 0xff << shift,
+ shift);
+ }
+
+ remain_count -= read_count;
+ index += read_count;
+ }
+
+ return 0;
+}
+
+static int mtk_hdmi_ddc_write_msg(struct mtk_hdmi_ddc *ddc, struct i2c_msg *msg)
+{
+ struct device *dev = ddc->adap.dev.parent;
+ u32 ack;
+
+ ddcm_trigger_mode(ddc, DDCM_START);
+ sif_write_mask(ddc, DDC_DDCMD0, DDCM_DATA0, 0, msg->addr << 1);
+ sif_write_mask(ddc, DDC_DDCMD0, DDCM_DATA1, 8, msg->buf[0]);
+ sif_write_mask(ddc, DDC_DDCMCTL1, DDCM_PGLEN_MASK, DDCM_PGLEN_OFFSET,
+ 0x1);
+ ddcm_trigger_mode(ddc, DDCM_WRITE_DATA);
+
+ ack = sif_read_mask(ddc, DDC_DDCMCTL1, DDCM_ACK_MASK, DDCM_ACK_OFFSET);
+ dev_dbg(dev, "ack = %d\n", ack);
+
+ if (ack != 0x03) {
+ dev_err(dev, "i2c ack err!\n");
+ return -EIO;
+ }
+
+ return 0;
+}
+
+static int mtk_hdmi_ddc_xfer(struct i2c_adapter *adapter,
+ struct i2c_msg *msgs, int num)
+{
+ struct mtk_hdmi_ddc *ddc = adapter->algo_data;
+ struct device *dev = adapter->dev.parent;
+ int ret;
+ int i;
+
+ if (!ddc) {
+ dev_err(dev, "invalid arguments\n");
+ return -EINVAL;
+ }
+
+ sif_set_bit(ddc, DDC_DDCMCTL0, DDCM_SCL_STRECH);
+ sif_set_bit(ddc, DDC_DDCMCTL0, DDCM_SM0EN);
+ sif_clr_bit(ddc, DDC_DDCMCTL0, DDCM_ODRAIN);
+
+ if (sif_bit_is_set(ddc, DDC_DDCMCTL1, DDCM_TRI)) {
+ dev_err(dev, "ddc line is busy!\n");
+ return -EBUSY;
+ }
+
+ sif_write_mask(ddc, DDC_DDCMCTL0, DDCM_CLK_DIV_MASK,
+ DDCM_CLK_DIV_OFFSET, SIF1_CLOK);
+
+ for (i = 0; i < num; i++) {
+ struct i2c_msg *msg = &msgs[i];
+
+ dev_dbg(dev, "i2c msg, adr:0x%x, flags:%d, len :0x%x\n",
+ msg->addr, msg->flags, msg->len);
+
+ if (msg->flags & I2C_M_RD)
+ ret = mtk_hdmi_ddc_read_msg(ddc, msg);
+ else
+ ret = mtk_hdmi_ddc_write_msg(ddc, msg);
+ if (ret < 0)
+ goto xfer_end;
+ }
+
+ ddcm_trigger_mode(ddc, DDCM_STOP);
+
+ return i;
+
+xfer_end:
+ ddcm_trigger_mode(ddc, DDCM_STOP);
+ dev_err(dev, "ddc failed!\n");
+ return ret;
+}
+
+static u32 mtk_hdmi_ddc_func(struct i2c_adapter *adapter)
+{
+ return I2C_FUNC_I2C | I2C_FUNC_SMBUS_EMUL;
+}
+
+static const struct i2c_algorithm mtk_hdmi_ddc_algorithm = {
+ .master_xfer = mtk_hdmi_ddc_xfer,
+ .functionality = mtk_hdmi_ddc_func,
+};
+
+static int mtk_hdmi_ddc_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct mtk_hdmi_ddc *ddc;
+ struct resource *mem;
+ int ret;
+
+ ddc = devm_kzalloc(dev, sizeof(struct mtk_hdmi_ddc), GFP_KERNEL);
+ if (!ddc)
+ return -ENOMEM;
+
+ ddc->clk = devm_clk_get(dev, "ddc-i2c");
+ if (IS_ERR(ddc->clk)) {
+ dev_err(dev, "get ddc_clk failed: %p ,\n", ddc->clk);
+ return PTR_ERR(ddc->clk);
+ }
+
+ mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+ ddc->regs = devm_ioremap_resource(&pdev->dev, mem);
+ if (IS_ERR(ddc->regs))
+ return PTR_ERR(ddc->regs);
+
+ ret = clk_prepare_enable(ddc->clk);
+ if (ret) {
+ dev_err(dev, "enable ddc clk failed!\n");
+ return ret;
+ }
+
+ strlcpy(ddc->adap.name, "mediatek-hdmi-ddc", sizeof(ddc->adap.name));
+ ddc->adap.owner = THIS_MODULE;
+ ddc->adap.class = I2C_CLASS_DDC;
+ ddc->adap.algo = &mtk_hdmi_ddc_algorithm;
+ ddc->adap.retries = 3;
+ ddc->adap.dev.of_node = dev->of_node;
+ ddc->adap.algo_data = ddc;
+ ddc->adap.dev.parent = &pdev->dev;
+
+ ret = i2c_add_adapter(&ddc->adap);
+ if (ret < 0) {
+ dev_err(dev, "failed to add bus to i2c core\n");
+ goto err_clk_disable;
+ }
+
+ platform_set_drvdata(pdev, ddc);
+
+ dev_dbg(dev, "ddc->adap: %p\n", &ddc->adap);
+ dev_dbg(dev, "ddc->clk: %p\n", ddc->clk);
+ dev_dbg(dev, "physical adr: %pa, end: %pa\n", &mem->start,
+ &mem->end);
+
+ return 0;
+
+err_clk_disable:
+ clk_disable_unprepare(ddc->clk);
+ return ret;
+}
+
+static int mtk_hdmi_ddc_remove(struct platform_device *pdev)
+{
+ struct mtk_hdmi_ddc *ddc = platform_get_drvdata(pdev);
+
+ i2c_del_adapter(&ddc->adap);
+ clk_disable_unprepare(ddc->clk);
+
+ return 0;
+}
+
+static const struct of_device_id mtk_hdmi_ddc_match[] = {
+ { .compatible = "mediatek,mt8173-hdmi-ddc", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, mtk_hdmi_ddc_match);
+
+struct platform_driver mtk_hdmi_ddc_driver = {
+ .probe = mtk_hdmi_ddc_probe,
+ .remove = mtk_hdmi_ddc_remove,
+ .driver = {
+ .name = "mediatek-hdmi-ddc",
+ .of_match_table = mtk_hdmi_ddc_match,
+ },
+};
+
+MODULE_AUTHOR("Jie Qiu <jie.qiu@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek HDMI DDC Driver");
+MODULE_LICENSE("GPL v2");