On Wed, Mar 30, 2016 at 06:22:24PM +0200, Enric Balletbo i Serra wrote:
> Although there are other chips from the same family that can reuse this
> driver, at the moment we only tested ANX7814 chip.
>
> The ANX7814 is an ultra-low power Full-HD (1080p60) SlimPort transmitter
> designed for portable devices. This driver adds initial support for HDMI
> to DP pass-through mode.
>
> Cc: Emil Velikov <emil.l.veli...@gmail.com>
> Cc: Rob Herring <r...@kernel.org>
> Cc: Dan Carpenter <dan.carpen...@oracle.com>
> Cc: Daniel Kurtz <djku...@chromium.org>
> Signed-off-by: Enric Balletbo i Serra <enric.balle...@collabora.com>
Some minor nits below, otherwise:
Tested-by: Nicolas Boichat <drink...@chromium.org>
Reviewed-by: Nicolas Boichat <drink...@chromium.org>
> ---
>
> Changes since v1:
> - Dan Carpenter:
> - Fix missing error code
> - Use meaningful names for goto exit paths
> - Rob Herring:
> - Use hpd instead cable_det as is the more standard name.
> - Daniel Kurtz:
> - Use regmap_bulk in aux_transfer
> - Fix gpio reset polarity.
> - Turn off v10 last so we mirror poweron sequence
> - Fix some error paths.
> - Remove mutex in anx78xx_detect
> - kbuild:
> - WARNING: PTR_ERR_OR_ZERO can be used
>
> free any cached EDID on any plug event.
> drivers/gpu/drm/bridge/Kconfig | 8 +
> drivers/gpu/drm/bridge/Makefile | 1 +
> drivers/gpu/drm/bridge/anx78xx.c | 1411
> ++++++++++++++++++++++++++++++++++++++
> drivers/gpu/drm/bridge/anx78xx.h | 719 +++++++++++++++++++
> 4 files changed, 2139 insertions(+)
> create mode 100644 drivers/gpu/drm/bridge/anx78xx.c
> create mode 100644 drivers/gpu/drm/bridge/anx78xx.h
>
> diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
> index 27e2022..0f595ae 100644
> --- a/drivers/gpu/drm/bridge/Kconfig
> +++ b/drivers/gpu/drm/bridge/Kconfig
> @@ -40,4 +40,12 @@ config DRM_PARADE_PS8622
> ---help---
> Parade eDP-LVDS bridge chip driver.
>
> +config DRM_ANX78XX
> + tristate "Analogix ANX78XX bridge"
> + select DRM_KMS_HELPER
> + select REGMAP_I2C
> + ---help---
> + ANX78XX is a HD video transmitter chip over micro-USB connector
> + for smartphone device.
> +
> endmenu
> diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
> index f13c33d..8f0d69e 100644
> --- a/drivers/gpu/drm/bridge/Makefile
> +++ b/drivers/gpu/drm/bridge/Makefile
> @@ -4,3 +4,4 @@ obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o
> obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o
> obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o
> obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o
> +obj-$(CONFIG_DRM_ANX78XX) += anx78xx.o
> diff --git a/drivers/gpu/drm/bridge/anx78xx.c
> b/drivers/gpu/drm/bridge/anx78xx.c
> new file mode 100644
> index 0000000..995a2a7
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx.c
> @@ -0,0 +1,1411 @@
> +/*
> + * Copyright(c) 2016, Analogix Semiconductor.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + * Based on anx7808 driver obtained from chromeos with copyright:
> + * Copyright(c) 2013, Google Inc.
> + *
> + */
> +#include <linux/async.h>
> +#include <linux/delay.h>
> +#include <linux/err.h>
> +#include <linux/interrupt.h>
> +#include <linux/i2c.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/of_gpio.h>
> +#include <linux/of_irq.h>
> +#include <linux/of_platform.h>
> +#include <linux/regmap.h>
> +#include <linux/types.h>
> +#include <linux/gpio/consumer.h>
> +#include <drm/drmP.h>
> +#include <drm/drm_atomic_helper.h>
> +#include <drm/drm_crtc.h>
> +#include <drm/drm_crtc_helper.h>
> +#include <drm/drm_dp_helper.h>
> +#include <drm/drm_edid.h>
> +
> +#include "anx78xx.h"
> +
> +#define I2C_NUM_ADDRESSES 5
> +#define I2C_IDX_TX_P0 0
> +#define I2C_IDX_TX_P1 1
> +#define I2C_IDX_TX_P2 2
> +#define I2C_IDX_RX_P0 3
> +#define I2C_IDX_RX_P1 4
> +
> +#define XTAL_CLK 270 /* 27M */
> +#define AUX_CH_BUFFER_SIZE 16
> +#define AUX_WAIT_TIMEOUT_MS 15
> +#define AUX_WAIT_INTERVAL_MS 1
> +
> +/*
> + * _wait_for - magic (register) wait macro
> + *
> + * Does the right thing for modeset paths when run under kdgb or similar
> atomic
> + * contexts. Note that it's important that we check the condition again after
> + * having timed out, since the timeout could be due to preemption or similar
> and
> + * we've never had a chance to check the condition before the timeout.
> + */
> +#define _wait_for(COND, TO_MS, INTVL_MS) ({ \
> + unsigned long timeout__ = jiffies + msecs_to_jiffies(TO_MS) + 1;\
> + int ret__ = 0; \
> + while (!(COND)) { \
> + if (time_after(jiffies, timeout__)) { \
> + if (!(COND)) \
> + ret__ = -ETIMEDOUT; \
> + break; \
> + } \
> + if (drm_can_sleep()) { \
> + usleep_range(INTVL_MS * 1000, \
> + (INTVL_MS + 1) * 1000); \
> + } else { \
> + cpu_relax(); \
> + } \
> + } \
> + ret__; \
> +})
> +
> +#define wait_for(COND, TO_MS, INTVL_MS) _wait_for(COND, TO_MS, INTVL_MS)
Since you only use this once, I'd rather you put a loop in the code,
rather than introducing this macro.
> +
> +static const u8 anx78xx_i2c_addresses[] = {
> + [I2C_IDX_TX_P0] = TX_P0,
> + [I2C_IDX_TX_P1] = TX_P1,
> + [I2C_IDX_TX_P2] = TX_P2,
> + [I2C_IDX_RX_P0] = RX_P0,
> + [I2C_IDX_RX_P1] = RX_P1,
> +};
> +
> +struct anx78xx_platform_data {
> + struct gpio_desc *gpiod_hpd;
> + struct gpio_desc *gpiod_pd;
> + struct gpio_desc *gpiod_reset;
> + struct gpio_desc *gpiod_v10;
> +
> + int hpd_irq;
> + int intp_irq;
> +};
> +
> +struct anx78xx {
> + struct drm_dp_aux aux;
> + struct drm_bridge bridge;
> + struct i2c_client *client;
> + struct edid *edid;
> + struct drm_connector connector;
> + struct drm_dp_link link;
> + struct anx78xx_platform_data pdata;
> + struct mutex lock;
> +
> + /*
> + * I2C Slave addresses of ANX7814 are mapped as TX_P0, TX_P1, TX_P2,
> + * RX_P0 and RX_P1.
> + */
> + struct i2c_client *i2c_dummy[I2C_NUM_ADDRESSES];
> + struct regmap *map[I2C_NUM_ADDRESSES];
> +
> + u16 chipid;
> + u8 dpcd[DP_RECEIVER_CAP_SIZE];
> +
> + bool powered;
> +};
> +
> +static int anx78xx_set_bits(struct regmap *map, u8 reg, u8 mask)
> +{
> + return regmap_update_bits(map, reg, mask, mask);
> +}
> +
> +static int anx78xx_clear_bits(struct regmap *map, u8 reg, u8 mask)
> +{
> + return regmap_update_bits(map, reg, mask, 0);
> +}
> +
> +static int anx78xx_aux_op_finished(struct anx78xx *anx78xx)
> +{
> + int err;
> + unsigned int aux_ctrl;
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL2_REG,
> + &aux_ctrl);
> + if (err)
> + return err;
> +
> + if (aux_ctrl & SP_AUX_EN)
> + return -EAGAIN;
> +
> + return 0;
> +}
> +
> +static int anx78xx_aux_wait(struct anx78xx *anx78xx)
> +{
> + int err;
> + unsigned int status;
> +
> + err = wait_for(!anx78xx_aux_op_finished(anx78xx), AUX_WAIT_TIMEOUT_MS,
> + AUX_WAIT_INTERVAL_MS);
> + if (err) {
> + DRM_ERROR("Timed out waiting AUX to finish\n");
> + return -ETIMEDOUT;
> + }
> +
> + /* Read the AUX channel access status */
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_CH_STATUS_REG,
> + &status);
> + if (err)
> + return err;
> +
> + if (status & SP_AUX_STATUS) {
> + DRM_ERROR("Failed to read AUX channel: 0x%02x\n", status);
> + return -ETIMEDOUT;
> + }
> +
> + return 0;
> +}
> +
> +static int anx78xx_aux_address(struct anx78xx *anx78xx, unsigned int addr)
> +{
> + int err = 0;
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_ADDR_7_0_REG,
> + addr & 0xff);
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_ADDR_15_8_REG,
> + (addr & 0xff00) >> 8);
> +
> + /*
> + * DP AUX CH Address Register #2, only update bits[3:0]
> + * [7:4] RESERVED
> + * [3:0] AUX_ADDR[19:16], Register control AUX CH address.
> + */
> + err |= regmap_update_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_AUX_ADDR_19_16_REG,
> + SP_AUX_ADDR_19_16_MASK,
> + (addr & 0xf0000) >> 16);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static ssize_t anx78xx_aux_transfer(struct drm_dp_aux *aux,
> + struct drm_dp_aux_msg *msg)
> +{
> + int err = 0;
> + struct anx78xx *anx78xx = container_of(aux, struct anx78xx, aux);
> + u8 ctrl1 = msg->request;
> + u8 ctrl2 = SP_AUX_EN;
> + u8 *buffer = msg->buffer;
> +
> + /* The DP AUX transmit and receive buffer has 16 bytes. */
> + if (WARN_ON(msg->size > AUX_CH_BUFFER_SIZE))
> + return -E2BIG;
> +
> + /* Zero-sized messages specify address-only transactions. */
> + if (msg->size < 1)
> + ctrl2 |= SP_ADDR_ONLY;
> + else /* For non-zero-sized set the length field. */
> + ctrl1 |= (msg->size - 1) << SP_AUX_LENGTH_SHIFT;
> +
> + if ((msg->request & DP_AUX_I2C_READ) == 0) {
> + /* When WRITE | MOT write values to data buffer */
> + err = regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_BUF_DATA0_REG, buffer,
> + msg->size);
> + if (err)
> + return -EIO;
> + }
> +
> + /* Write address and request */
> + err |= anx78xx_aux_address(anx78xx, msg->address);
err =
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL1_REG,
> + ctrl1);
> + if (err)
> + return -EIO;
> +
> + /* Start transaction */
> + err |= regmap_update_bits(anx78xx->map[I2C_IDX_TX_P0],
err =
> + SP_DP_AUX_CH_CTRL2_REG, SP_ADDR_ONLY |
> + SP_AUX_EN, ctrl2);
> + if (err)
> + return -EIO;
return err;
Do not replace the error code if it's readily available to you (many other
instances below).
> +
> + err = anx78xx_aux_wait(anx78xx);
> +
> + msg->reply = err ? DP_AUX_I2C_REPLY_NACK : DP_AUX_I2C_REPLY_ACK;
> +
> + if ((msg->size > 0) && (msg->request & DP_AUX_I2C_READ)) {
> + /* Read values from data buffer */
> + err = regmap_bulk_read(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_BUF_DATA0_REG, buffer,
> + msg->size);
> + if (err)
> + return -EIO;
> + }
> +
> + err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_AUX_CH_CTRL2_REG, SP_ADDR_ONLY);
> + if (err)
> + return -EIO;
> +
> + return msg->size;
> +}
> +
> +static int anx78xx_set_hpd(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
> + SP_HPD_OUT);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int anx78xx_clear_hpd(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
> + SP_HPD_OUT);
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static const struct reg_sequence tmds_phy_initialization[] = {
> + { SP_TMDS_CTRL_BASE + 1, 0x90 },
> + { SP_TMDS_CTRL_BASE + 2, 0xa9 },
> + { SP_TMDS_CTRL_BASE + 6, 0x92 },
> + { SP_TMDS_CTRL_BASE + 7, 0x80 },
> + { SP_TMDS_CTRL_BASE + 20, 0xf2 },
> + { SP_TMDS_CTRL_BASE + 22, 0xc4 },
> + { SP_TMDS_CTRL_BASE + 23, 0x18 },
> +};
> +
> +static int anx78xx_rx_initialization(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
> + SP_AUD_MUTE | SP_VID_MUTE);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_CHIP_CTRL_REG,
> + SP_MAN_HDMI5V_DET | SP_PLLLOCK_CKDT_EN |
> + SP_DIGITAL_CKDT_EN);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_SOFTWARE_RESET1_REG, SP_HDCP_MAN_RST |
> + SP_SW_MAN_RST | SP_TMDS_RST | SP_VIDEO_RST);
> +
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_SOFTWARE_RESET1_REG, SP_HDCP_MAN_RST |
> + SP_SW_MAN_RST | SP_TMDS_RST | SP_VIDEO_RST);
> +
> + /* Sync detect change, GP set mute */
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_AUD_EXCEPTION_ENABLE_BASE + 1, BIT(5) |
> + BIT(6));
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_AUD_EXCEPTION_ENABLE_BASE + 3,
> + SP_AEC_EN21);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_AUDVID_CTRL_REG,
> + SP_AVC_EN | SP_AAC_OE | SP_AAC_EN);
> +
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_SYSTEM_POWER_DOWN1_REG, SP_PWDN_CTRL);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
> + SP_VID_DATA_RANGE_CTRL_REG, SP_R2Y_INPUT_LIMIT);
> +
> + /* Enable DDC stretch */
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_EXTRA_I2C_DEV_ADDR_REG, SP_I2C_EXTRA_ADDR);
> +
> + /* TMDS phy initialization */
> + err |= regmap_multi_reg_write(anx78xx->map[I2C_IDX_RX_P0],
> + tmds_phy_initialization,
> + ARRAY_SIZE(tmds_phy_initialization));
> +
> + err |= anx78xx_clear_hpd(anx78xx);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static const u8 dp_tx_output_precise_tune_bits[20] = {
> + 0x01, 0x03, 0x07, 0x7f, 0x71, 0x6b, 0x7f,
> + 0x73, 0x7f, 0x7f, 0x00, 0x00, 0x00, 0x00,
> + 0x0c, 0x42, 0x1e, 0x3e, 0x72, 0x7e,
> +};
> +
> +static int anx78xx_link_phy_initialization(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + /*
> + * REVISIT : It is writing to a RESERVED bits in Analog Control 0
> + * register.
> + */
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_ANALOG_CTRL0_REG,
> + 0x02);
> +
> + /*
> + * Write DP TX output emphasis precise tune bits.
> + */
> + err |= regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P1],
> + SP_DP_TX_LT_CTRL0_REG,
> + dp_tx_output_precise_tune_bits,
> + ARRAY_SIZE(dp_tx_output_precise_tune_bits));
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int anx78xx_xtal_clk_sel(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> + unsigned int regval;
> +
> + err |= regmap_update_bits(anx78xx->map[I2C_IDX_TX_P2],
> + SP_ANALOG_DEBUG2_REG,
> + SP_XTAL_FRQ | SP_FORCE_SW_OFF_BYPASS,
> + SP_XTAL_FRQ_27M);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL3_REG,
> + XTAL_CLK & SP_WAIT_COUNTER_7_0_MASK);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL4_REG,
> + ((XTAL_CLK & 0xff00) >> 2) | (XTAL_CLK / 10));
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_I2C_GEN_10US_TIMER0_REG, XTAL_CLK & 0xff);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_I2C_GEN_10US_TIMER1_REG,
> + (XTAL_CLK & 0xff00) >> 8);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_MISC_CTRL_REG,
> + XTAL_CLK / 10 - 1);
> +
> + err |= regmap_read(anx78xx->map[I2C_IDX_RX_P0],
> + SP_HDMI_US_TIMER_CTRL_REG,
> + ®val);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_RX_P0],
> + SP_HDMI_US_TIMER_CTRL_REG,
> + (regval & SP_MS_TIMER_MARGIN_10_8_MASK) |
> + ((((XTAL_CLK / 10) >> 1) - 2) << 3));
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static const struct reg_sequence otp_key_protect[] = {
> + { SP_OTP_KEY_PROTECT1_REG, SP_OTP_PSW1 },
> + { SP_OTP_KEY_PROTECT2_REG, SP_OTP_PSW2 },
> + { SP_OTP_KEY_PROTECT3_REG, SP_OTP_PSW3 },
> +};
> +
> +static int anx78xx_tx_initialization(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + /* Set terminal resistor to 50 ohm */
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL2_REG,
> + 0x30);
> +
> + /* Enable aux double diff output */
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_AUX_CH_CTRL2_REG, 0x08);
> +
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_HDCP_CTRL_REG, SP_AUTO_EN |
> + SP_AUTO_START);
> +
> + err |= regmap_multi_reg_write(anx78xx->map[I2C_IDX_TX_P0],
> + otp_key_protect,
> + ARRAY_SIZE(otp_key_protect));
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_HDCP_KEY_COMMAND_REG, SP_DISABLE_SYNC_HDCP);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL8_REG,
> + SP_VID_VRES_TH);
> +
> + /*
> + * DP HDCP auto authentication wait timer (when downstream starts to
> + * auth, DP side will wait for this period then do auth automatically)
> + */
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_HDCP_AUTO_TIMER_REG,
> + 0x00);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_HDCP_CTRL_REG, SP_LINK_POLLING);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_LINK_DEBUG_CTRL_REG, SP_M_VID_DEBUG);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2],
> + SP_ANALOG_DEBUG2_REG, SP_POWERON_TIME_1P5MS);
> +
> + err |= anx78xx_xtal_clk_sel(anx78xx);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_DEFER_CTRL_REG,
> + SP_DEFER_CTRL_EN | 0x0c);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_POLLING_CTRL_REG,
> + SP_AUTO_POLLING_DISABLE);
> +
> + /*
> + * Short the link integrity check timer to speed up bstatus
> + * polling for HDCP CTS item 1A-07
> + */
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_HDCP_LINK_CHECK_TIMER_REG, 0x1d);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_MISC_CTRL_REG, SP_EQ_TRAINING_LOOP);
> +
> + /* Power down the main link by default */
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
> +
> + err |= anx78xx_link_phy_initialization(anx78xx);
> +
> + /* Gen m_clk with downspreading */
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_M_CALCULATION_CTRL_REG, SP_M_GEN_CLK_SEL);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int anx78xx_enable_interrupts(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + /*
> + * BIT0: INT pin assertion polarity: 1 = assert high
> + * BIT1: INT pin output type: 0 = push/pull
> + */
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_INT_CTRL_REG, 0x01);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P2],
> + SP_COMMON_INT_MASK4_REG, SP_HPD_LOST | SP_HPD_PLUG);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_MASK1_REG,
> + SP_TRAINING_FINISH);
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_MASK1_REG,
> + SP_CKDT_CHG | SP_SCDT_CHG);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static void anx78xx_poweron(struct anx78xx *anx78xx)
> +{
> + struct anx78xx_platform_data *pdata = &anx78xx->pdata;
> +
> + if (WARN_ON(anx78xx->powered))
> + return;
> +
> + if (pdata->gpiod_v10) {
> + gpiod_set_value_cansleep(pdata->gpiod_v10, 1);
> + usleep_range(1000, 2000);
> + }
> +
> + gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
> + usleep_range(1000, 2000);
> +
> + gpiod_set_value_cansleep(pdata->gpiod_pd, 0);
> + usleep_range(1000, 2000);
> +
> + gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
> +
> + /* Power on registers module */
> + anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
> + SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
> + anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
> + SP_REGISTER_PD | SP_TOTAL_PD);
> +
> + anx78xx->powered = true;
> +}
> +
> +static void anx78xx_poweroff(struct anx78xx *anx78xx)
> +{
> + struct anx78xx_platform_data *pdata = &anx78xx->pdata;
> +
> + if (WARN_ON(!anx78xx->powered))
> + return;
> +
> + gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
> + usleep_range(1000, 2000);
> +
> + gpiod_set_value_cansleep(pdata->gpiod_pd, 1);
> + usleep_range(1000, 2000);
> +
> + if (pdata->gpiod_v10) {
> + gpiod_set_value_cansleep(pdata->gpiod_v10, 0);
> + usleep_range(1000, 2000);
> + }
> +
> + anx78xx->powered = false;
> +}
> +
> +static int anx78xx_start(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + /* Power on all modules */
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
> + SP_POWERDOWN_CTRL_REG,
> + SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD |
> + SP_LINK_PD);
> +
> + err |= anx78xx_enable_interrupts(anx78xx);
> + err |= anx78xx_rx_initialization(anx78xx);
> + err |= anx78xx_tx_initialization(anx78xx);
> +
> + if (err) {
> + DRM_ERROR("Failed SlimPort transmitter initialization\n");
> + anx78xx_poweroff(anx78xx);
> + return -EIO;
> + }
> +
> + /*
> + * This delay seems to help keep the hardware in a good state. Without
> + * it, there are times where it fails silently.
> + */
> + usleep_range(10000, 15000);
> +
> + return 0;
> +}
> +
> +static int anx78xx_init_gpio(struct anx78xx *anx78xx)
> +{
> + struct device *dev = &anx78xx->client->dev;
> + struct anx78xx_platform_data *pdata = &anx78xx->pdata;
> +
> + /* GPIO for hpd */
> + pdata->gpiod_hpd = devm_gpiod_get(dev, "hpd", GPIOD_IN);
> + if (IS_ERR(pdata->gpiod_hpd))
> + return PTR_ERR(pdata->gpiod_hpd);
> +
> + /* GPIO for chip power down */
> + pdata->gpiod_pd = devm_gpiod_get(dev, "pd", GPIOD_OUT_HIGH);
> + if (IS_ERR(pdata->gpiod_pd))
> + return PTR_ERR(pdata->gpiod_pd);
> +
> + /* GPIO for chip reset */
> + pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
> + if (IS_ERR(pdata->gpiod_reset))
> + return PTR_ERR(pdata->gpiod_reset);
> +
> + /* GPIO for V10 power control */
> + pdata->gpiod_v10 = devm_gpiod_get_optional(dev, "v10", GPIOD_OUT_LOW);
> +
> + return PTR_ERR_OR_ZERO(pdata->gpiod_v10);
> +}
> +
> +static int anx78xx_dp_link_training(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> + u8 dp_bw, regval;
> +
> + err |= regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
> + 0x0);
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
> + SP_POWERDOWN_CTRL_REG,
> + SP_TOTAL_PD);
> + if (err)
> + return -EIO;
> +
> + err = drm_dp_dpcd_readb(&anx78xx->aux, DP_MAX_LINK_RATE, &dp_bw);
> + if (err < 0)
> + return err;
> +
> + switch (dp_bw) {
> + case DP_LINK_BW_1_62:
> + case DP_LINK_BW_2_7:
> + case DP_LINK_BW_5_4:
> + break;
> + default:
> + DRM_DEBUG_KMS("Waiting to read DP bandwidth.\n");
> + return -EAGAIN;
> + }
> +
> + err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
> + SP_VIDEO_MUTE);
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
> + SP_VID_CTRL1_REG, SP_VIDEO_EN);
> + if (err)
> + return -EIO;
> +
> + /* Get dpcd info */
> + err = drm_dp_dpcd_read(&anx78xx->aux, DP_DPCD_REV,
> + &anx78xx->dpcd, DP_RECEIVER_CAP_SIZE);
> + if (err < 0) {
> + DRM_ERROR("Failed to read DPCD\n");
> + return err;
> + }
> +
> + /* Clear channel x SERDES power down */
> + err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_ANALOG_POWER_DOWN_REG, SP_CH0_PD);
> + if (err)
> + return -EIO;
> +
> + /* Check link capabilities */
> + err = drm_dp_link_probe(&anx78xx->aux, &anx78xx->link);
> + if (err < 0) {
> + DRM_ERROR("Failed to probe link capabilities\n");
> + return err;
> + }
> +
> + /* Power up the sink */
> + err = drm_dp_link_power_up(&anx78xx->aux, &anx78xx->link);
> + if (err < 0) {
> + DRM_ERROR("Failed to power up DisplayPort link\n");
> + return err;
> + }
> +
> + /* Possibly enable downspread on the sink */
> + err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_DOWNSPREAD_CTRL1_REG, 0);
> + if (err)
> + return -EIO;
> +
> + if (anx78xx->dpcd[3] & 0x1) {
> + DRM_DEBUG("Enable downspread on the sink\n");
> + /* 4000PPM */
> + err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_DOWNSPREAD_CTRL1_REG, 8);
> + if (err)
> + return -EIO;
> +
> + err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_DOWNSPREAD_CTRL,
> + DP_SPREAD_AMP_0_5);
> + if (err < 0)
> + return err;
> + } else {
> + err = drm_dp_dpcd_writeb(&anx78xx->aux, DP_DOWNSPREAD_CTRL, 0);
> + if (err < 0)
> + return err;
> + }
> +
> + /* Set the lane count and the link rate on the sink */
> + if (drm_dp_enhanced_frame_cap(anx78xx->dpcd))
> + err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_SYSTEM_CTRL_BASE + 4,
> + SP_ENHANCED_MODE);
> + else
> + err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_SYSTEM_CTRL_BASE + 4,
> + SP_ENHANCED_MODE);
> + if (err)
> + return -EIO;
> +
> + regval = drm_dp_link_rate_to_bw_code(anx78xx->link.rate);
> + err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
> + SP_DP_MAIN_LINK_BW_SET_REG, regval);
> + if (err)
> + return -EIO;
> +
> + err = drm_dp_link_configure(&anx78xx->aux, &anx78xx->link);
> + if (err < 0) {
> + DRM_ERROR("Failed to configure DisplayPort link\n");
> + return err;
> + }
> +
> + /* Start training on the source */
> + err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_LT_CTRL_REG,
> + SP_LT_EN);
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int anx78xx_config_dp_output(struct anx78xx *anx78xx)
> +{
> + int err = 0;
> +
> + err |= anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
> + SP_VIDEO_MUTE);
> + /* Enable DP output */
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
> + SP_VIDEO_EN);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static int anx78xx_send_video_infoframe(struct anx78xx *anx78xx,
> + struct hdmi_avi_infoframe *frame)
> +{
> + int err;
> + u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
> +
> + err = hdmi_avi_infoframe_pack(frame, buffer, sizeof(buffer));
> + if (err < 0) {
> + DRM_ERROR("Failed to pack AVI infoframe: %d\n", err);
> + return err;
> + }
> +
> + err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
> +
> + err |= regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P2],
> + SP_INFOFRAME_AVI_DB1_REG, buffer,
> + frame->length);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_UD);
> +
> + err |= anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
> + SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
> +
> + if (err)
> + return -EIO;
> +
> + return 0;
> +}
> +
> +static inline struct anx78xx *
> + connector_to_anx78xx(struct drm_connector *connector)
> +{
> + return container_of(connector, struct anx78xx, connector);
> +}
> +
> +static int anx78xx_get_downstream_info(struct anx78xx *anx78xx)
> +{
> + int err;
> + u8 regval;
> +
> + err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SINK_COUNT, ®val);
> + if (err < 0) {
> + DRM_ERROR("Get sink count failed %d\n", err);
> + return err;
> + }
> +
> + if (!DP_GET_SINK_COUNT(regval)) {
> + DRM_ERROR("Downstream disconnected\n");
> + return -EIO;
> + }
> +
> + return 0;
> +}
> +
> +static int anx78xx_get_modes(struct drm_connector *connector)
> +{
> + int err, num_modes = 0;
> + struct anx78xx *anx78xx = connector_to_anx78xx(connector);
> +
> + if (WARN_ON(!anx78xx->powered))
> + return 0;
> +
> + if (anx78xx->edid)
> + return drm_add_edid_modes(connector, anx78xx->edid);
> +
> + mutex_lock(&anx78xx->lock);
> +
> + err = anx78xx_get_downstream_info(anx78xx);
> + if (err) {
> + DRM_ERROR("Failed to get downstream info: %d\n", err);
> + goto unlock;
> + }
> +
> + anx78xx->edid = drm_get_edid(connector, &anx78xx->aux.ddc);
> + if (!anx78xx->edid) {
> + DRM_ERROR("Failed to read edid\n");
> + goto unlock;
> + }
> +
> + err = drm_mode_connector_update_edid_property(connector,
> + anx78xx->edid);
> + if (err) {
> + DRM_ERROR("Failed to update edid property\n");
> + goto unlock;
> + }
> +
> + num_modes = drm_add_edid_modes(connector, anx78xx->edid);
> + /* Store the ELD */
> + drm_edid_to_eld(connector, anx78xx->edid);
> +
> +unlock:
> + mutex_unlock(&anx78xx->lock);
> +
> + return num_modes;
> +}
> +
> +static struct drm_encoder *anx78xx_best_encoder(struct drm_connector
> *connector)
> +{
> + struct anx78xx *anx78xx = connector_to_anx78xx(connector);
> +
> + return anx78xx->bridge.encoder;
> +}
> +
> +static const struct drm_connector_helper_funcs
> + anx78xx_connector_helper_funcs = {
> + .get_modes = anx78xx_get_modes,
> + .best_encoder = anx78xx_best_encoder,
> +};
> +
> +static enum drm_connector_status anx78xx_detect(struct drm_connector
> *connector,
> + bool force)
> +{
> + struct anx78xx *anx78xx = container_of(connector, struct anx78xx,
> + connector);
> +
> + DRM_DEBUG_KMS("[CONNECTOR:%d:%s]\n", connector->base.id,
> + connector->name);
> +
> + if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd)) {
> + DRM_DEBUG_KMS("CONNECTOR STATUS DISCONNECTED\n");
> + return connector_status_disconnected;
> + }
> +
> + return connector_status_connected;
> +}
> +
> +static void anx78xx_connector_destroy(struct drm_connector *connector)
> +{
> + drm_connector_cleanup(connector);
> +}
> +
> +static const struct drm_connector_funcs anx78xx_connector_funcs = {
> + .dpms = drm_atomic_helper_connector_dpms,
> + .fill_modes = drm_helper_probe_single_connector_modes,
> + .detect = anx78xx_detect,
> + .destroy = anx78xx_connector_destroy,
> + .reset = drm_atomic_helper_connector_reset,
> + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
> + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
> +};
> +
> +static inline struct anx78xx *bridge_to_anx78xx(struct drm_bridge *bridge)
> +{
> + return container_of(bridge, struct anx78xx, bridge);
> +}
> +
> +static int anx78xx_bridge_attach(struct drm_bridge *bridge)
> +{
> + struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
> + int err;
> +
> + if (!bridge->encoder) {
> + DRM_ERROR("Parent encoder object not found");
> + return -ENODEV;
> + }
> +
> + /* Register aux channel */
> + anx78xx->aux.name = "DP-AUX";
> + anx78xx->aux.dev = &anx78xx->client->dev;
> + anx78xx->aux.transfer = anx78xx_aux_transfer;
> +
> + err = drm_dp_aux_register(&anx78xx->aux);
> + if (err < 0) {
> + DRM_ERROR("Failed to register aux channel: %d\n", err);
> + return err;
> + }
> +
> + err = drm_connector_init(bridge->dev, &anx78xx->connector,
> + &anx78xx_connector_funcs,
> + DRM_MODE_CONNECTOR_DisplayPort);
> + if (err) {
> + DRM_ERROR("Failed to initialize connector: %d\n", err);
> + return err;
> + }
> +
> + drm_connector_helper_add(&anx78xx->connector,
> + &anx78xx_connector_helper_funcs);
> +
> + err = drm_connector_register(&anx78xx->connector);
> + if (err) {
> + DRM_ERROR("Failed to register connector: %d\n", err);
> + return err;
> + }
> +
> + anx78xx->connector.polled = DRM_CONNECTOR_POLL_HPD;
> +
> + err = drm_mode_connector_attach_encoder(&anx78xx->connector,
> + bridge->encoder);
> + if (err) {
> + DRM_ERROR("Failed to link up connector to encoder: %d\n", err);
> + return err;
> + }
> +
> + return 0;
> +}
> +
> +static bool anx78xx_bridge_mode_fixup(struct drm_bridge *bridge,
> + const struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted_mode)
> +{
> + if (mode->flags & DRM_MODE_FLAG_INTERLACE)
> + return false;
> +
> + /* Max 1200p at 5.4 Ghz, one lane */
> + if (mode->clock > 154000)
> + return false;
This can be in a follow up patch, but we need to restrict resolutions according
to the current bandwidth (e.g. 720p at 2.7Ghz).
> +
> + return true;
> +}
> +
> +static void anx78xx_bridge_disable(struct drm_bridge *bridge) {
> + struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
> +
> + mutex_lock(&anx78xx->lock);
> +
> + /* Power off all modules except configuration registers access */
> + anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_POWERDOWN_CTRL_REG,
> + SP_HDCP_PD | SP_AUDIO_PD | SP_VIDEO_PD | SP_LINK_PD);
> +
> + mutex_unlock(&anx78xx->lock);
> +}
> +
> +static void anx78xx_bridge_mode_set(struct drm_bridge *bridge,
> + struct drm_display_mode *mode,
> + struct drm_display_mode *adjusted_mode)
> +{
> + int err;
> + struct hdmi_avi_infoframe frame;
> + struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
> +
> + if (WARN_ON(!anx78xx->powered))
> + return;
> +
> + mutex_lock(&anx78xx->lock);
> +
> + mode = adjusted_mode;
> +
> + err = drm_hdmi_avi_infoframe_from_display_mode(&frame, mode);
> + if (err) {
> + DRM_ERROR("Failed to setup AVI infoframe: %d\n", err);
> + goto unlock;
> + }
> +
> + err = anx78xx_send_video_infoframe(anx78xx, &frame);
> + if (err)
> + DRM_ERROR("Failed to send AVI infoframe: %d\n", err);
> +
> +unlock:
> + mutex_unlock(&anx78xx->lock);
> +}
> +
> +static void anx78xx_bridge_enable(struct drm_bridge *bridge) {
> + int err;
> + struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
> +
> + mutex_lock(&anx78xx->lock);
> +
> + err = anx78xx_start(anx78xx);
> + if (err)
> + DRM_ERROR("Failed to initialize: %d\n", err);
> +
> + err = anx78xx_set_hpd(anx78xx);
> + if (err)
> + DRM_ERROR("Failed to set HPD: %d\n", err);
> +
> + mutex_unlock(&anx78xx->lock);
> +}
> +
> +static const struct drm_bridge_funcs anx78xx_bridge_funcs = {
> + .attach = anx78xx_bridge_attach,
> + .mode_fixup = anx78xx_bridge_mode_fixup,
> + .disable = anx78xx_bridge_disable,
> + .mode_set = anx78xx_bridge_mode_set,
> + .enable = anx78xx_bridge_enable,
> +};
> +
> +static irqreturn_t anx78xx_hpd_threaded_handler(int unused, void *data)
> +{
> + int err;
> + struct anx78xx *anx78xx = data;
> +
> + if (anx78xx->powered)
> + return IRQ_HANDLED;
> +
> + mutex_lock(&anx78xx->lock);
> +
> + /* Cable is pulled, power on the chip */
> + anx78xx_poweron(anx78xx);
> +
> + err = anx78xx_enable_interrupts(anx78xx);
> + if (err)
> + DRM_ERROR("Failed to enable interrupts: %d\n", err);
> +
> + mutex_unlock(&anx78xx->lock);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static int anx78xx_handle_dp_int_1(struct anx78xx *anx78xx, u8 irq)
> +{
> + int err;
> +
> + DRM_DEBUG_KMS("Handle DP interrupt 1: %02x\n", irq);
> +
> + err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_STATUS1_REG,
> + irq);
> + if (err)
> + return err;
> +
> + if (irq & SP_TRAINING_FINISH) {
> + DRM_DEBUG_KMS("IRQ: hardware link training finished\n");
> + err = anx78xx_config_dp_output(anx78xx);
> + }
> +
> + return err;
> +}
> +
> +static bool anx78xx_handle_common_int_4(struct anx78xx *anx78xx, u8 irq)
> +{
> + int err;
> + bool event = false;
> +
> + DRM_DEBUG_KMS("Handle common interrupt 4: %02x\n", irq);
> +
> + err = regmap_write(anx78xx->map[I2C_IDX_TX_P2],
> + SP_COMMON_INT_STATUS4_REG, irq);
> + if (err) {
> + DRM_ERROR("Failed to write SP_COMMON_INT_STATUS4 %d\n", err);
> + return event;
> + }
> +
> + if (irq & SP_HPD_LOST) {
> + DRM_DEBUG_KMS("IRQ: Hot plug detect - cable is pulled out\n");
> + event = true;
> + anx78xx_poweroff(anx78xx);
> + } else if (irq & SP_HPD_PLUG) {
> + DRM_DEBUG_KMS("IRQ: Hot plug detect - cable plug\n");
> + event = true;
> + /* Free previous cached EDID if any */
> + kfree(anx78xx->edid);
> + anx78xx->edid = NULL;
> + }
> +
> + return event;
> +}
> +
> +static void anx78xx_handle_hdmi_int_1(struct anx78xx *anx78xx, u8 irq)
> +{
> + int err;
> + unsigned int regval;
> +
> + DRM_DEBUG_KMS("Handle HDMI interrupt 1: %02x\n", irq);
> +
> + err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_STATUS1_REG,
> + irq);
> + if (err) {
> + DRM_ERROR("Write hdmi int 1 failed %d\n", err);
> + return;
> + }
> +
> + if ((irq & SP_CKDT_CHG) || (irq & SP_SCDT_CHG)) {
> + DRM_DEBUG_KMS("IRQ: HDMI input detected\n");
> + err = regmap_read(anx78xx->map[I2C_IDX_RX_P0],
> + SP_SYSTEM_STATUS_REG, ®val);
> + if (err) {
> + DRM_ERROR("Read system status reg failed %d\n", err);
> + return;
> + }
> +
> + if (!(regval & SP_TMDS_CLOCK_DET)) {
> + DRM_DEBUG_KMS("IRQ: *** Waiting for HDMI clock ***\n");
> + return;
> + }
> + if (!(regval & SP_TMDS_DE_DET)) {
> + DRM_DEBUG_KMS("IRQ: *** Waiting for HDMI signal ***\n");
> + return;
> + }
> +
> + err = anx78xx_dp_link_training(anx78xx);
> + if (err)
> + DRM_ERROR("Failed to start link training: %d\n", err);
> + }
> +}
> +
> +static irqreturn_t anx78xx_intp_threaded_handler(int unused, void *data)
> +{
> + struct anx78xx *anx78xx = data;
> + int err;
> + unsigned int irq;
> + bool event = false;
> +
> + mutex_lock(&anx78xx->lock);
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_STATUS1_REG,
> + &irq);
> + if (err) {
> + DRM_ERROR("Failed to read dp int 1 status %d\n", err);
> + goto unlock;
> + } else if (irq) {
> + anx78xx_handle_dp_int_1(anx78xx, irq);
> + }
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P2],
> + SP_COMMON_INT_STATUS4_REG, &irq);
> + if (err) {
> + DRM_ERROR("Failed to read common int 4 status %d\n", err);
> + goto unlock;
> + } else if (irq) {
> + event = anx78xx_handle_common_int_4(anx78xx, irq);
> + }
> +
> + /* Make sure we are still powered after handle HPD events */
> + if (!anx78xx->powered)
> + goto unlock;
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_RX_P0], SP_INT_STATUS1_REG,
> + &irq);
> + if (err)
> + DRM_ERROR("Failed to read hdmi int 1 status %d\n", err);
> + else if (irq)
> + anx78xx_handle_hdmi_int_1(anx78xx, irq);
> +
> +unlock:
> + mutex_unlock(&anx78xx->lock);
> +
> + if (event)
> + drm_helper_hpd_irq_event(anx78xx->connector.dev);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void unregister_i2c_dummy_clients(struct anx78xx *anx78xx)
> +{
> + int i;
> +
> + for (i = 0; i < ARRAY_SIZE(anx78xx->i2c_dummy); i++)
> + if (anx78xx->i2c_dummy[i])
> + i2c_unregister_device(anx78xx->i2c_dummy[i]);
> +}
> +
> +static const struct regmap_config anx78xx_regmap_config = {
> + .reg_bits = 8,
> + .val_bits = 8,
> +};
> +
> +static const u16 anx78xx_chipid_list[] = {
> + 0x7812,
> + 0x7814,
> + 0x7818,
> +};
> +
> +static int anx78xx_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct anx78xx *anx78xx;
> + struct anx78xx_platform_data *pdata;
> + int err, i;
> + unsigned int idl, idh, version;
> + bool found = false;
> +
> + anx78xx = devm_kzalloc(&client->dev, sizeof(*anx78xx), GFP_KERNEL);
> + if (!anx78xx)
> + return -ENOMEM;
> +
> + pdata = &anx78xx->pdata;
> +
> + mutex_init(&anx78xx->lock);
> +
> +#if IS_ENABLED(CONFIG_OF)
> + anx78xx->bridge.of_node = client->dev.of_node;
> +#endif
> +
> + anx78xx->client = client;
> + i2c_set_clientdata(client, anx78xx);
> +
> + err = anx78xx_init_gpio(anx78xx);
> + if (err) {
> + DRM_ERROR("Failed to initialize gpios\n");
> + return err;
> + }
> +
> + pdata->hpd_irq = gpiod_to_irq(pdata->gpiod_hpd);
> + if (pdata->hpd_irq < 0) {
> + DRM_ERROR("Failed to get hpd irq %d\n",
> + pdata->hpd_irq);
> + return -ENODEV;
> + }
> +
> + pdata->intp_irq = client->irq;
> + if (!pdata->intp_irq) {
> + DRM_ERROR("Failed to get CABLE_DET and INTP irq\n");
> + return -ENODEV;
> + }
> +
> + /* Map slave addresses of ANX7814 */
> + for (i = 0; i < I2C_NUM_ADDRESSES; i++) {
> + anx78xx->i2c_dummy[i] = i2c_new_dummy(client->adapter,
> + anx78xx_i2c_addresses[i] >> 1);
> + if (!anx78xx->i2c_dummy[i]) {
> + err = -ENOMEM;
> + DRM_ERROR("Failed to reserve i2c bus %02x.\n",
> + anx78xx_i2c_addresses[i]);
> + goto err_unregister_i2c;
> + }
> +
> + anx78xx->map[i] = devm_regmap_init_i2c(anx78xx->i2c_dummy[i],
> + &anx78xx_regmap_config);
> + if (IS_ERR(anx78xx->map[i])) {
> + err = PTR_ERR(anx78xx->map[i]);
> + DRM_ERROR("Failed regmap initialization %02x.\n",
> + anx78xx_i2c_addresses[i]);
> + goto err_unregister_i2c;
> + }
> + }
> +
> + /* Look for supported chip id */
> + anx78xx_poweron(anx78xx);
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_IDL_REG,
> + &idl);
> + if (err)
> + goto err_poweroff;
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_IDH_REG,
> + &idh);
> + if (err)
> + goto err_poweroff;
> +
> + anx78xx->chipid = (u8)idl | ((u8)idh << 8);
> +
> + err = regmap_read(anx78xx->map[I2C_IDX_TX_P2], SP_DEVICE_VERSION_REG,
> + &version);
> + if (err)
> + goto err_poweroff;
> +
> + for (i = 0; i < ARRAY_SIZE(anx78xx_chipid_list); i++) {
> + if (anx78xx->chipid == anx78xx_chipid_list[i]) {
> + DRM_INFO("Found ANX%x (ver. %d) SlimPort Transmitter\n",
> + anx78xx->chipid, version);
> + found = true;
> + break;
> + }
> + }
> +
> + if (!found) {
> + DRM_ERROR("ANX%x (ver. %d) not supported by this driver\n",
> + anx78xx->chipid, version);
> + err = -ENODEV;
> + goto err_poweroff;
> + }
> +
> + err = devm_request_threaded_irq(&client->dev, pdata->hpd_irq,
> + NULL,
> + anx78xx_hpd_threaded_handler,
> + IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> + "anx78xx-hpd", anx78xx);
> + if (err) {
> + DRM_ERROR("Failed to request CABLE_DET threaded irq\n");
> + goto err_poweroff;
> + }
> +
> + err = devm_request_threaded_irq(&client->dev, pdata->intp_irq, NULL,
> + anx78xx_intp_threaded_handler,
> + IRQF_TRIGGER_RISING | IRQF_ONESHOT,
> + "anx78xx-intp", anx78xx);
> + if (err) {
> + DRM_ERROR("Failed to request INTP threaded irq\n");
> + goto err_poweroff;
> + }
> +
> + anx78xx->bridge.funcs = &anx78xx_bridge_funcs;
> + err = drm_bridge_add(&anx78xx->bridge);
> + if (err < 0) {
> + DRM_ERROR("Failed to add drm bridge\n");
> + goto err_poweroff;
> + }
> +
> + /* If cable is pulled out, just poweroff and wait for hpd event */
> + if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))
> + anx78xx_poweroff(anx78xx);
> +
> + return 0;
> +
> +err_poweroff:
> + anx78xx_poweroff(anx78xx);
> +
> +err_unregister_i2c:
> + unregister_i2c_dummy_clients(anx78xx);
> + return err;
> +}
> +
> +static int anx78xx_i2c_remove(struct i2c_client *client)
> +{
> + struct anx78xx *anx78xx = i2c_get_clientdata(client);
> +
> + drm_bridge_remove(&anx78xx->bridge);
> +
> + unregister_i2c_dummy_clients(anx78xx);
> +
> + kfree(anx78xx->edid);
> + anx78xx->edid = NULL;
> +
> + return 0;
> +}
> +
> +static const struct i2c_device_id anx78xx_id[] = {
> + {"anx7814", 0},
> + { /* sentinel */ }
> +};
> +
> +MODULE_DEVICE_TABLE(i2c, anx78xx_id);
> +
> +#if IS_ENABLED(CONFIG_OF)
> +static const struct of_device_id anx78xx_match_table[] = {
> + {.compatible = "analogix,anx7814",},
> + { /* sentinel */ },
> +};
> +MODULE_DEVICE_TABLE(of, anx78xx_match_table);
> +#endif
> +
> +static struct i2c_driver anx78xx_driver = {
> + .driver = {
> + .name = "anx7814",
> + .of_match_table = of_match_ptr(anx78xx_match_table),
> + },
> + .probe = anx78xx_i2c_probe,
> + .remove = anx78xx_i2c_remove,
> + .id_table = anx78xx_id,
> +};
> +
> +module_i2c_driver(anx78xx_driver);
> +
> +MODULE_DESCRIPTION("ANX78xx SlimPort Transmitter driver");
> +MODULE_AUTHOR("Enric Balletbo i Serra <enric.balle...@collabora.com>");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/gpu/drm/bridge/anx78xx.h
> b/drivers/gpu/drm/bridge/anx78xx.h
> new file mode 100644
> index 0000000..38753c8
> --- /dev/null
> +++ b/drivers/gpu/drm/bridge/anx78xx.h
> @@ -0,0 +1,719 @@
> +/*
> + * Copyright(c) 2016, Analogix Semiconductor. All rights reserved.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * This program is distributed in the hope that it will be useful,
> + * but WITHOUT ANY WARRANTY; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
> + * GNU General Public License for more details.
> + *
> + */
> +
> +#ifndef __ANX78xx_H
> +#define __ANX78xx_H
> +
> +#define TX_P0 0x70
> +#define TX_P1 0x7a
> +#define TX_P2 0x72
> +
> +#define RX_P0 0x7e
> +#define RX_P1 0x80
> +
> +/***************************************************************/
> +/* Register definition of device address 0x7e */
> +/***************************************************************/
> +
> +/*
> + * System Control and Status
> + */
> +
> +/* Software Reset Register 1 */
> +#define SP_SOFTWARE_RESET1_REG 0x11
> +#define SP_VIDEO_RST BIT(4)
> +#define SP_HDCP_MAN_RST BIT(2)
> +#define SP_TMDS_RST BIT(1)
> +#define SP_SW_MAN_RST BIT(0)
> +
> +/* System Status Register */
> +#define SP_SYSTEM_STATUS_REG 0x14
> +#define SP_TMDS_CLOCK_DET BIT(1)
> +#define SP_TMDS_DE_DET BIT(0)
> +
> +/* HDMI Status Register */
> +#define SP_HDMI_STATUS_REG 0x15
> +#define SP_HDMI_AUD_LAYOUT BIT(3)
> +#define SP_HDMI_DET BIT(0)
> +# define SP_DVI_MODE 0
> +# define SP_HDMI_MODE 1
> +
> +/* HDMI Mute Control Register */
> +#define SP_HDMI_MUTE_CTRL_REG 0x16
> +#define SP_AUD_MUTE BIT(1)
> +#define SP_VID_MUTE BIT(0)
> +
> +/* System Power Down Register 1 */
> +#define SP_SYSTEM_POWER_DOWN1_REG 0x18
> +#define SP_PWDN_CTRL BIT(0)
> +
> +/*
> + * Audio and Video Auto Control
> + */
> +
> +/* Auto Audio and Video Control register */
> +#define SP_AUDVID_CTRL_REG 0x20
> +#define SP_AVC_OE BIT(7)
> +#define SP_AAC_OE BIT(6)
> +#define SP_AVC_EN BIT(1)
> +#define SP_AAC_EN BIT(0)
> +
> +/* Audio Exception Enable Registers */
> +#define SP_AUD_EXCEPTION_ENABLE_BASE (0x24 - 1)
> +/* Bits for Audio Exception Enable Register 3 */
> +#define SP_AEC_EN21 BIT(5)
> +
> +/*
> + * Interrupt
> + */
> +
> +/* Interrupt Status Register 1 */
> +#define SP_INT_STATUS1_REG 0x31
> +/* Bits for Interrupt Status Register 1 */
> +#define SP_HDMI_DVI BIT(7)
> +#define SP_CKDT_CHG BIT(6)
> +#define SP_SCDT_CHG BIT(5)
> +#define SP_PCLK_CHG BIT(4)
> +#define SP_PLL_UNLOCK BIT(3)
> +#define SP_CABLE_PLUG_CHG BIT(2)
> +#define SP_SET_MUTE BIT(1)
> +#define SP_SW_INTR BIT(0)
> +/* Bits for Interrupt Status Register 2 */
> +#define SP_HDCP_ERR BIT(5)
> +#define SP_AUDIO_SAMPLE_CHG BIT(0) /* undocumented */
> +/* Bits for Interrupt Status Register 3 */
> +#define SP_AUD_MODE_CHG BIT(0)
> +/* Bits for Interrupt Status Register 5 */
> +#define SP_AUDIO_RCV BIT(0)
> +/* Bits for Interrupt Status Register 6 */
> +#define SP_INT_STATUS6_REG 0x36
> +#define SP_CTS_RCV BIT(7)
> +#define SP_NEW_AUD_PKT BIT(4)
> +#define SP_NEW_AVI_PKT BIT(1)
> +#define SP_NEW_CP_PKT BIT(0)
> +/* Bits for Interrupt Status Register 7 */
> +#define SP_NO_VSI BIT(7)
> +#define SP_NEW_VS BIT(4)
> +
> +/* Interrupt Mask 1 Status Registers */
> +#define SP_INT_MASK1_REG 0x41
> +
> +/* HDMI US TIMER Control Register */
> +#define SP_HDMI_US_TIMER_CTRL_REG 0x49
> +#define SP_MS_TIMER_MARGIN_10_8_MASK 0x07
> +
> +/*
> + * TMDS Control
> + */
> +
> +/* TMDS Control Registers */
> +#define SP_TMDS_CTRL_BASE (0x50 - 1)
> +/* Bits for TMDS Control Register 7 */
> +#define SP_PD_RT BIT(0)
> +
> +/*
> + * Video Control
> + */
> +
> +/* Video Status Register */
> +#define SP_VIDEO_STATUS_REG 0x70
> +#define SP_COLOR_DEPTH_MASK 0xf0
> +#define SP_COLOR_DEPTH_SHIFT 4
> +# define SP_COLOR_DEPTH_MODE_LEGACY 0x00
> +# define SP_COLOR_DEPTH_MODE_24BIT 0x04
> +# define SP_COLOR_DEPTH_MODE_30BIT 0x05
> +# define SP_COLOR_DEPTH_MODE_36BIT 0x06
> +# define SP_COLOR_DEPTH_MODE_48BIT 0x07
> +
> +/* Video Data Range Control Register */
> +#define SP_VID_DATA_RANGE_CTRL_REG 0x83
> +#define SP_R2Y_INPUT_LIMIT BIT(1)
> +
> +/* Pixel Clock High Resolution Counter Registers */
> +#define SP_PCLK_HIGHRES_CNT_BASE (0x8c - 1)
> +
> +/*
> + * Audio Control
> + */
> +
> +/* Number of Audio Channels Status Registers */
> +#define SP_AUD_CH_STATUS_REG_NUM 6
> +
> +/* Audio IN S/PDIF Channel Status Registers */
> +#define SP_AUD_SPDIF_CH_STATUS_BASE 0xc7
> +
> +/* Audio IN S/PDIF Channel Status Register 4 */
> +#define SP_FS_FREQ_MASK 0x0f
> +# define SP_FS_FREQ_44100HZ 0x00
> +# define SP_FS_FREQ_48000HZ 0x02
> +# define SP_FS_FREQ_32000HZ 0x03
> +# define SP_FS_FREQ_88200HZ 0x08
> +# define SP_FS_FREQ_96000HZ 0x0a
> +# define SP_FS_FREQ_176400HZ 0x0c
> +# define SP_FS_FREQ_192000HZ 0x0e
> +
> +/*
> + * Micellaneous Control Block
> + */
> +
> +/* CHIP Control Register */
> +#define SP_CHIP_CTRL_REG 0xe3
> +#define SP_MAN_HDMI5V_DET BIT(3)
> +#define SP_PLLLOCK_CKDT_EN BIT(2)
> +#define SP_ANALOG_CKDT_EN BIT(1)
> +#define SP_DIGITAL_CKDT_EN BIT(0)
> +
> +/* Packet Receiving Status Register */
> +#define SP_PACKET_RECEIVING_STATUS_REG 0xf3
> +#define SP_AVI_RCVD BIT(5)
> +#define SP_VSI_RCVD BIT(1)
> +
> +/***************************************************************/
> +/* Register definition of device address 0x80 */
> +/***************************************************************/
> +
> +/* HDCP BCAPS Shadow Register */
> +#define SP_HDCP_BCAPS_SHADOW_REG 0x2a
> +#define SP_BCAPS_REPEATER BIT(5)
> +
> +/* HDCP Status Register */
> +#define SP_RX_HDCP_STATUS_REG 0x3f
> +#define SP_AUTH_EN BIT(4)
> +
> +/*
> + * InfoFrame and Control Packet Registers
> + */
> +
> +/* AVI InfoFrame packet checksum */
> +#define SP_AVI_INFOFRAME_CHECKSUM 0xa3
> +
> +/* AVI InfoFrame Registers */
> +#define SP_AVI_INFOFRAME_DATA_BASE 0xa4
> +
> +#define SP_AVI_COLOR_F_MASK 0x60
> +#define SP_AVI_COLOR_F_SHIFT 5
> +
> +/* Audio InfoFrame Registers */
> +#define SP_AUD_INFOFRAME_DATA_BASE 0xc4
> +#define SP_AUD_INFOFRAME_LAYOUT_MASK 0x0f
> +
> +/* MPEG/HDMI Vendor Specific InfoFrame Packet type code */
> +#define SP_MPEG_VS_INFOFRAME_TYPE_REG 0xe0
> +
> +/* MPEG/HDMI Vendor Specific InfoFrame Packet length */
> +#define SP_MPEG_VS_INFOFRAME_LEN_REG 0xe2
> +
> +/* MPEG/HDMI Vendor Specific InfoFrame Packet version number */
> +#define SP_MPEG_VS_INFOFRAME_VER_REG 0xe1
> +
> +/* MPEG/HDMI Vendor Specific InfoFrame Packet content */
> +#define SP_MPEG_VS_INFOFRAME_DATA_BASE 0xe4
> +
> +/* General Control Packet Register */
> +#define SP_GENERAL_CTRL_PACKET_REG 0x9f
> +#define SP_CLEAR_AVMUTE BIT(4)
> +#define SP_SET_AVMUTE BIT(0)
> +
> +/***************************************************************/
> +/* Register definition of device address 0x70 */
> +/***************************************************************/
> +
> +/* HDCP Status Register */
> +#define SP_TX_HDCP_STATUS_REG 0x00
> +#define SP_AUTH_FAIL BIT(5)
> +#define SP_AUTHEN_PASS BIT(1)
> +
> +/* HDCP Control Register 0 */
> +#define SP_HDCP_CTRL0_REG 0x01
> +#define SP_RX_REPEATER BIT(6)
> +#define SP_RE_AUTH BIT(5)
> +#define SP_SW_AUTH_OK BIT(4)
> +#define SP_HARD_AUTH_EN BIT(3)
> +#define SP_HDCP_ENC_EN BIT(2)
> +#define SP_BKSV_SRM_PASS BIT(1)
> +#define SP_KSVLIST_VLD BIT(0)
> +/* HDCP Function Enabled */
> +#define SP_HDCP_FUNCTION_ENABLED (BIT(0) | BIT(1) | BIT(2) | BIT(3))
> +
> +/* HDCP Receiver BSTATUS Register 0 */
> +#define SP_HDCP_RX_BSTATUS0_REG 0x1b
> +/* HDCP Receiver BSTATUS Register 1 */
> +#define SP_HDCP_RX_BSTATUS1_REG 0x1c
> +
> +/* HDCP Embedded "Blue Screen" Content Registers */
> +#define SP_HDCP_VID0_BLUE_SCREEN_REG 0x2c
> +#define SP_HDCP_VID1_BLUE_SCREEN_REG 0x2d
> +#define SP_HDCP_VID2_BLUE_SCREEN_REG 0x2e
> +
> +/* HDCP Wait R0 Timing Register */
> +#define SP_HDCP_WAIT_R0_TIME_REG 0x40
> +
> +/* HDCP Link Integrity Check Timer Register */
> +#define SP_HDCP_LINK_CHECK_TIMER_REG 0x41
> +
> +/* HDCP Repeater Ready Wait Timer Register */
> +#define SP_HDCP_RPTR_RDY_WAIT_TIME_REG 0x42
> +
> +/* HDCP Auto Timer Register */
> +#define SP_HDCP_AUTO_TIMER_REG 0x51
> +
> +/* HDCP Key Status Register */
> +#define SP_HDCP_KEY_STATUS_REG 0x5e
> +
> +/* HDCP Key Command Register */
> +#define SP_HDCP_KEY_COMMAND_REG 0x5f
> +#define SP_DISABLE_SYNC_HDCP BIT(2)
> +
> +/* OTP Memory Key Protection Registers */
> +#define SP_OTP_KEY_PROTECT1_REG 0x60
> +#define SP_OTP_KEY_PROTECT2_REG 0x61
> +#define SP_OTP_KEY_PROTECT3_REG 0x62
> +#define SP_OTP_PSW1 0xa2
> +#define SP_OTP_PSW2 0x7e
> +#define SP_OTP_PSW3 0xc6
> +
> +/* DP System Control Registers */
> +#define SP_DP_SYSTEM_CTRL_BASE (0x80 - 1)
> +/* Bits for DP System Control Register 2 */
> +#define SP_CHA_STA BIT(2)
> +/* Bits for DP System Control Register 3 */
> +#define SP_HPD_STATUS BIT(6)
> +#define SP_STRM_VALID BIT(2)
> +/* Bits for DP System Control Register 4 */
> +#define SP_ENHANCED_MODE BIT(3)
> +
> +/* DP Video Control Register */
> +#define SP_DP_VIDEO_CTRL_REG 0x84
> +#define SP_COLOR_F_MASK 0x06
> +#define SP_COLOR_F_SHIFT 1
> +#define SP_BPC_MASK 0xe0
> +#define SP_BPC_SHIFT 5
> +# define SP_BPC_6BITS 0x00
> +# define SP_BPC_8BITS 0x01
> +# define SP_BPC_10BITS 0x02
> +# define SP_BPC_12BITS 0x03
> +
> +/* DP Audio Control Register */
> +#define SP_DP_AUDIO_CTRL_REG 0x87
> +#define SP_AUD_EN BIT(0)
> +
> +/* 10us Pulse Generate Timer Registers */
> +#define SP_I2C_GEN_10US_TIMER0_REG 0x88
> +#define SP_I2C_GEN_10US_TIMER1_REG 0x89
> +
> +/* Packet Send Control Register */
> +#define SP_PACKET_SEND_CTRL_REG 0x90
> +#define SP_AUD_IF_UP BIT(7)
> +#define SP_AVI_IF_UD BIT(6)
> +#define SP_MPEG_IF_UD BIT(5)
> +#define SP_SPD_IF_UD BIT(4)
> +#define SP_AUD_IF_EN BIT(3)
> +#define SP_AVI_IF_EN BIT(2)
> +#define SP_MPEG_IF_EN BIT(1)
> +#define SP_SPD_IF_EN BIT(0)
> +
> +/* DP HDCP Control Register */
> +#define SP_DP_HDCP_CTRL_REG 0x92
> +#define SP_AUTO_EN BIT(7)
> +#define SP_AUTO_START BIT(5)
> +#define SP_LINK_POLLING BIT(1)
> +
> +/* DP Main Link Bandwidth Setting Register */
> +#define SP_DP_MAIN_LINK_BW_SET_REG 0xa0
> +#define SP_LINK_BW_SET_MASK 0x1f
> +#define SP_INITIAL_SLIM_M_AUD_SEL BIT(5)
> +
> +/* DP Training Pattern Set Register */
> +#define SP_DP_TRAINING_PATTERN_SET_REG 0xa2
> +
> +/* DP Lane 0 Link Training Control Register */
> +#define SP_DP_LANE0_LT_CTRL_REG 0xa3
> +#define SP_TX_SW_SET_MASK 0x1b
> +#define SP_MAX_PRE_REACH BIT(5)
> +#define SP_MAX_DRIVE_REACH BIT(4)
> +#define SP_PRE_EMP_LEVEL1 BIT(3)
> +#define SP_DRVIE_CURRENT_LEVEL1 BIT(0)
> +
> +/* DP Link Training Control Register */
> +#define SP_DP_LT_CTRL_REG 0xa8
> +#define SP_LT_ERROR_TYPE_MASK 0x70
> +# define SP_LT_NO_ERROR 0x00
> +# define SP_LT_AUX_WRITE_ERROR 0x01
> +# define SP_LT_MAX_DRIVE_REACHED 0x02
> +# define SP_LT_WRONG_LANE_COUNT_SET 0x03
> +# define SP_LT_LOOP_SAME_5_TIME 0x04
> +# define SP_LT_CR_FAIL_IN_EQ 0x05
> +# define SP_LT_EQ_LOOP_5_TIME 0x06
> +#define SP_LT_EN BIT(0)
> +
> +/* DP CEP Training Control Registers */
> +#define SP_DP_CEP_TRAINING_CTRL0_REG 0xa9
> +#define SP_DP_CEP_TRAINING_CTRL1_REG 0xaa
> +
> +/* DP Debug Register 1 */
> +#define SP_DP_DEBUG1_REG 0xb0
> +#define SP_DEBUG_PLL_LOCK BIT(4)
> +#define SP_POLLING_EN BIT(1)
> +
> +/* DP Polling Control Register */
> +#define SP_DP_POLLING_CTRL_REG 0xb4
> +#define SP_AUTO_POLLING_DISABLE BIT(0)
> +
> +/* DP Link Debug Control Register */
> +#define SP_DP_LINK_DEBUG_CTRL_REG 0xb8
> +#define SP_M_VID_DEBUG BIT(5)
> +#define SP_NEW_PRBS7 BIT(4)
> +#define SP_INSERT_ER BIT(1)
> +#define SP_PRBS31_EN BIT(0)
> +
> +/* AUX Misc control Register */
> +#define SP_AUX_MISC_CTRL_REG 0xbf
> +
> +/* DP PLL control Register */
> +#define SP_DP_PLL_CTRL_REG 0xc7
> +#define SP_PLL_RST BIT(6)
> +
> +/* DP Analog Power Down Register */
> +#define SP_DP_ANALOG_POWER_DOWN_REG 0xc8
> +#define SP_CH0_PD BIT(0)
> +
> +/* DP Misc Control Register */
> +#define SP_DP_MISC_CTRL_REG 0xcd
> +#define SP_EQ_TRAINING_LOOP BIT(6)
> +
> +/* DP Extra I2C Device Address Register */
> +#define SP_DP_EXTRA_I2C_DEV_ADDR_REG 0xce
> +#define SP_I2C_STRETCH_DISABLE BIT(7)
> +
> +#define SP_I2C_EXTRA_ADDR 0x50
> +
> +/* DP Downspread Control Register 1 */
> +#define SP_DP_DOWNSPREAD_CTRL1_REG 0xd0
> +
> +/* DP M Value Calculation Control Register */
> +#define SP_DP_M_CALCULATION_CTRL_REG 0xd9
> +#define SP_M_GEN_CLK_SEL BIT(0)
> +
> +/* AUX Channel Access Status Register */
> +#define SP_AUX_CH_STATUS_REG 0xe0
> +#define SP_AUX_STATUS 0x0f
> +
> +/* AUX Channel DEFER Control Register */
> +#define SP_AUX_DEFER_CTRL_REG 0xe2
> +#define SP_DEFER_CTRL_EN BIT(7)
> +
> +/* DP Buffer Data Count Register */
> +#define SP_BUF_DATA_COUNT_REG 0xe4
> +#define SP_BUF_DATA_COUNT_MASK 0x1f
> +#define SP_BUF_CLR BIT(7)
> +
> +/* DP AUX Channel Control Register 1 */
> +#define SP_DP_AUX_CH_CTRL1_REG 0xe5
> +#define SP_AUX_TX_COMM_MASK 0x0f
> +#define SP_AUX_LENGTH_MASK 0xf0
> +#define SP_AUX_LENGTH_SHIFT 4
> +
> +/* DP AUX CH Address Register 0 */
> +#define SP_AUX_ADDR_7_0_REG 0xe6
> +
> +/* DP AUX CH Address Register 1 */
> +#define SP_AUX_ADDR_15_8_REG 0xe7
> +
> +/* DP AUX CH Address Register 2 */
> +#define SP_AUX_ADDR_19_16_REG 0xe8
> +#define SP_AUX_ADDR_19_16_MASK 0x0f
> +
> +/* DP AUX Channel Control Register 2 */
> +#define SP_DP_AUX_CH_CTRL2_REG 0xe9
> +#define SP_AUX_SEL_RXCM BIT(6)
> +#define SP_AUX_CHSEL BIT(3)
> +#define SP_AUX_PN_INV BIT(2)
> +#define SP_ADDR_ONLY BIT(1)
> +#define SP_AUX_EN BIT(0)
> +
> +/* DP Video Stream Control InfoFrame Register */
> +#define SP_DP_3D_VSC_CTRL_REG 0xea
> +#define SP_INFO_FRAME_VSC_EN BIT(0)
> +
> +/* DP Video Stream Data Byte 1 Register */
> +#define SP_DP_VSC_DB1_REG 0xeb
> +
> +/* DP AUX Channel Control Register 3 */
> +#define SP_DP_AUX_CH_CTRL3_REG 0xec
> +#define SP_WAIT_COUNTER_7_0_MASK 0xff
> +
> +/* DP AUX Channel Control Register 4 */
> +#define SP_DP_AUX_CH_CTRL4_REG 0xed
> +
> +/* DP AUX Buffer Data Registers */
> +#define SP_DP_BUF_DATA0_REG 0xf0
> +
> +/***************************************************************/
> +/* Register definition of device address 0x72 */
> +/***************************************************************/
> +
> +/*
> + * Core Register Definitions
> + */
> +
> +/* Device ID Low Byte Register */
> +#define SP_DEVICE_IDL_REG 0x02
> +
> +/* Device ID High Byte Register */
> +#define SP_DEVICE_IDH_REG 0x03
> +
> +/* Device version register */
> +#define SP_DEVICE_VERSION_REG 0x04
> +
> +/* Power Down Control Register */
> +#define SP_POWERDOWN_CTRL_REG 0x05
> +#define SP_REGISTER_PD BIT(7)
> +#define SP_HDCP_PD BIT(5)
> +#define SP_AUDIO_PD BIT(4)
> +#define SP_VIDEO_PD BIT(3)
> +#define SP_LINK_PD BIT(2)
> +#define SP_TOTAL_PD BIT(1)
> +
> +/* Reset Control Register 1 */
> +#define SP_RESET_CTRL1_REG 0x06
> +#define SP_MISC_RST BIT(7)
> +#define SP_VIDCAP_RST BIT(6)
> +#define SP_VIDFIF_RST BIT(5)
> +#define SP_AUDFIF_RST BIT(4)
> +#define SP_AUDCAP_RST BIT(3)
> +#define SP_HDCP_RST BIT(2)
> +#define SP_SW_RST BIT(1)
> +#define SP_HW_RST BIT(0)
> +
> +/* Reset Control Register 2 */
> +#define SP_RESET_CTRL2_REG 0x07
> +#define SP_AUX_RST BIT(2)
> +#define SP_SERDES_FIFO_RST BIT(1)
> +#define SP_I2C_REG_RST BIT(0)
> +
> +/* Video Control Register 1 */
> +#define SP_VID_CTRL1_REG 0x08
> +#define SP_VIDEO_EN BIT(7)
> +#define SP_VIDEO_MUTE BIT(2)
> +#define SP_DE_GEN BIT(1)
> +#define SP_DEMUX BIT(0)
> +
> +/* Video Control Register 2 */
> +#define SP_VID_CTRL2_REG 0x09
> +#define SP_IN_COLOR_F_MASK 0x03
> +#define SP_IN_YC_BIT_SEL BIT(2)
> +#define SP_IN_BPC_MASK 0x70
> +#define SP_IN_BPC_SHIFT 4
> +# define SP_IN_BPC_12BIT 0x03
> +# define SP_IN_BPC_10BIT 0x02
> +# define SP_IN_BPC_8BIT 0x01
> +# define SP_IN_BPC_6BIT 0x00
> +#define SP_IN_D_RANGE BIT(7)
> +
> +/* Video Control Register 3 */
> +#define SP_VID_CTRL3_REG 0x0a
> +#define SP_HPD_OUT BIT(6)
> +
> +/* Video Control Register 5 */
> +#define SP_VID_CTRL5_REG 0x0c
> +#define SP_CSC_STD_SEL BIT(7)
> +#define SP_XVYCC_RNG_LMT BIT(6)
> +#define SP_RANGE_Y2R BIT(5)
> +#define SP_CSPACE_Y2R BIT(4)
> +#define SP_RGB_RNG_LMT BIT(3)
> +#define SP_Y_RNG_LMT BIT(2)
> +#define SP_RANGE_R2Y BIT(1)
> +#define SP_CSPACE_R2Y BIT(0)
> +
> +/* Video Control Register 6 */
> +#define SP_VID_CTRL6_REG 0x0d
> +#define SP_TEST_PATTERN_EN BIT(7)
> +#define SP_VIDEO_PROCESS_EN BIT(6)
> +#define SP_VID_US_MODE BIT(3)
> +#define SP_VID_DS_MODE BIT(2)
> +#define SP_UP_SAMPLE BIT(1)
> +#define SP_DOWN_SAMPLE BIT(0)
> +
> +/* Video Control Register 8 */
> +#define SP_VID_CTRL8_REG 0x0f
> +#define SP_VID_VRES_TH BIT(0)
> +
> +/* Total Line Status Low Byte Register */
> +#define SP_TOTAL_LINE_STAL_REG 0x24
> +
> +/* Total Line Status High Byte Register */
> +#define SP_TOTAL_LINE_STAH_REG 0x25
> +
> +/* Active Line Status Low Byte Register */
> +#define SP_ACT_LINE_STAL_REG 0x26
> +
> +/* Active Line Status High Byte Register */
> +#define SP_ACT_LINE_STAH_REG 0x27
> +
> +/* Vertical Front Porch Status Register */
> +#define SP_V_F_PORCH_STA_REG 0x28
> +
> +/* Vertical SYNC Width Status Register */
> +#define SP_V_SYNC_STA_REG 0x29
> +
> +/* Vertical Back Porch Status Register */
> +#define SP_V_B_PORCH_STA_REG 0x2a
> +
> +/* Total Pixel Status Low Byte Register */
> +#define SP_TOTAL_PIXEL_STAL_REG 0x2b
> +
> +/* Total Pixel Status High Byte Register */
> +#define SP_TOTAL_PIXEL_STAH_REG 0x2c
> +
> +/* Active Pixel Status Low Byte Register */
> +#define SP_ACT_PIXEL_STAL_REG 0x2d
> +
> +/* Active Pixel Status High Byte Register */
> +#define SP_ACT_PIXEL_STAH_REG 0x2e
> +
> +/* Horizontal Front Porch Status Low Byte Register */
> +#define SP_H_F_PORCH_STAL_REG 0x2f
> +
> +/* Horizontal Front Porch Statys High Byte Register */
> +#define SP_H_F_PORCH_STAH_REG 0x30
> +
> +/* Horizontal SYNC Width Status Low Byte Register */
> +#define SP_H_SYNC_STAL_REG 0x31
> +
> +/* Horizontal SYNC Width Status High Byte Register */
> +#define SP_H_SYNC_STAH_REG 0x32
> +
> +/* Horizontal Back Porch Status Low Byte Register */
> +#define SP_H_B_PORCH_STAL_REG 0x33
> +
> +/* Horizontal Back Porch Status High Byte Register */
> +#define SP_H_B_PORCH_STAH_REG 0x34
> +
> +/* InfoFrame AVI Packet DB1 Register */
> +#define SP_INFOFRAME_AVI_DB1_REG 0x70
> +
> +/* Bit Control Specific Register */
> +#define SP_BIT_CTRL_SPECIFIC_REG 0x80
> +#define SP_BIT_CTRL_SELECT_SHIFT 1
> +#define SP_ENABLE_BIT_CTRL BIT(0)
> +
> +/* InfoFrame Audio Packet DB1 Register */
> +#define SP_INFOFRAME_AUD_DB1_REG 0x83
> +
> +/* InfoFrame MPEG Packet DB1 Register */
> +#define SP_INFOFRAME_MPEG_DB1_REG 0xb0
> +
> +/* Audio Channel Status Registers */
> +#define SP_AUD_CH_STATUS_BASE 0xd0
> +
> +/* Audio Channel Num Register 5 */
> +#define SP_I2S_CHANNEL_NUM_MASK 0xe0
> +# define SP_I2S_CH_NUM_1 (0x00 << 5)
> +# define SP_I2S_CH_NUM_2 (0x01 << 5)
> +# define SP_I2S_CH_NUM_3 (0x02 << 5)
> +# define SP_I2S_CH_NUM_4 (0x03 << 5)
> +# define SP_I2S_CH_NUM_5 (0x04 << 5)
> +# define SP_I2S_CH_NUM_6 (0x05 << 5)
> +# define SP_I2S_CH_NUM_7 (0x06 << 5)
> +# define SP_I2S_CH_NUM_8 (0x07 << 5)
> +#define SP_EXT_VUCP BIT(2)
> +#define SP_VBIT BIT(1)
> +#define SP_AUDIO_LAYOUT BIT(0)
> +
> +/* Analog Debug Register 2 */
> +#define SP_ANALOG_DEBUG2_REG 0xdd
> +#define SP_FORCE_SW_OFF_BYPASS 0x20
> +#define SP_XTAL_FRQ 0x1c
> +# define SP_XTAL_FRQ_19M2 (0x00 << 2)
> +# define SP_XTAL_FRQ_24M (0x01 << 2)
> +# define SP_XTAL_FRQ_25M (0x02 << 2)
> +# define SP_XTAL_FRQ_26M (0x03 << 2)
> +# define SP_XTAL_FRQ_27M (0x04 << 2)
> +# define SP_XTAL_FRQ_38M4 (0x05 << 2)
> +# define SP_XTAL_FRQ_52M (0x06 << 2)
> +#define SP_POWERON_TIME_1P5MS 0x03
> +
> +/* Analog Control 0 Register */
> +#define SP_ANALOG_CTRL0_REG 0xe1
> +
> +/* Common Interrupt Status Register 1 */
> +#define SP_COMMON_INT_STATUS_BASE (0xf1 - 1)
> +#define SP_PLL_LOCK_CHG 0x40
> +
> +/* Common Interrupt Status Register 2 */
> +#define SP_COMMON_INT_STATUS2 0xf2
> +#define SP_HDCP_AUTH_CHG BIT(1)
> +#define SP_HDCP_AUTH_DONE BIT(0)
> +
> +#define SP_HDCP_LINK_CHECK_FAIL BIT(0)
> +
> +/* Common Interrupt Status Register 4 */
> +#define SP_COMMON_INT_STATUS4_REG 0xf4
> +#define SP_HPD_IRQ BIT(6)
> +#define SP_HPD_ESYNC_ERR BIT(4)
> +#define SP_HPD_CHG BIT(2)
> +#define SP_HPD_LOST BIT(1)
> +#define SP_HPD_PLUG BIT(0)
> +
> +/* DP Interrupt Status Register */
> +#define SP_DP_INT_STATUS1_REG 0xf7
> +#define SP_TRAINING_FINISH BIT(5)
> +#define SP_POLLING_ERR BIT(4)
> +
> +/* Common Interrupt Mask Register */
> +#define SP_COMMON_INT_MASK_BASE (0xf8 - 1)
> +
> +#define SP_COMMON_INT_MASK4_REG 0xfb
> +
> +/* DP Interrupts Mask Register */
> +#define SP_DP_INT_MASK1_REG 0xfe
> +
> +/* Interrupt Control Register */
> +#define SP_INT_CTRL_REG 0xff
> +
> +/***************************************************************/
> +/* Register definition of device address 0x7a */
> +/***************************************************************/
> +
> +/* DP TX Link Training Control Register */
> +#define SP_DP_TX_LT_CTRL0_REG 0x30
> +
> +/* PD 1.2 Lint Training 80bit Pattern Register */
> +#define SP_DP_LT_80BIT_PATTERN0_REG 0x80
> +#define SP_DP_LT_80BIT_PATTERN_REG_NUM 10
> +
> +/* Audio Interface Control Register 0 */
> +#define SP_AUD_INTERFACE_CTRL0_REG 0x5f
> +#define SP_AUD_INTERFACE_DISABLE 0x80
> +
> +/* Audio Interface Control Register 2 */
> +#define SP_AUD_INTERFACE_CTRL2_REG 0x60
> +#define SP_M_AUD_ADJUST_ST 0x04
> +
> +/* Audio Interface Control Register 3 */
> +#define SP_AUD_INTERFACE_CTRL3_REG 0x62
> +
> +/* Audio Interface Control Register 4 */
> +#define SP_AUD_INTERFACE_CTRL4_REG 0x67
> +
> +/* Audio Interface Control Register 5 */
> +#define SP_AUD_INTERFACE_CTRL5_REG 0x68
> +
> +/* Audio Interface Control Register 6 */
> +#define SP_AUD_INTERFACE_CTRL6_REG 0x69
> +
> +/* Firmware Version Register */
> +#define SP_FW_VER_REG 0xb7
> +
> +#endif
> --
> 2.1.0
>
