[PATCH v4 4/4] drm: bridge: anx78xx: Add anx78xx driver support.

From: Enric Balletbo i Serra
Date: Mon Apr 18 2016 - 07:27:15 EST

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.

Signed-off-by: Enric Balletbo i Serra <enric.balletbo@xxxxxxxxxxxxx>
Tested-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
Reviewed-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
Cc: Emil Velikov <emil.l.velikov@xxxxxxxxx>
Cc: Rob Herring <robh@xxxxxxxxxx>
Cc: Dan Carpenter <dan.carpenter@xxxxxxxxxx>
Cc: Daniel Kurtz <djkurtz@xxxxxxxxxxxx>
Cc: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
Cc: Thierry Reding <treding@xxxxxxxxxx>
---
Changes since v3:
- Thierry Reding:
- Add vendor name on symbols and files
- Remove <linux/async.h> include
- Improve anx78xx_aux_wait code (remove atomic case)
- Fix msg->reply handling
- Capitalize HPD/HDMI/DP
- Don't return -EAGAIN on link training
- Use symbolic constants defined instead of magic numbers
- Move connector_to_anx78xx after the anx78xx declaration
- Improve some coding style
- Give the first parameter the proper name (irq)
- Leave out the tab-padding in anx78xx_bridge_funcs
- Put bridge_to_anx78xx together with the connector cast function.
- The structure name should start in the first column
- Remove messages for connector status changes
- Free the EDID on unplug instead of on plug event
- Use unsigned int for i in for loops.
- Model v10 as regulator.
- Remove the use of OR'ed errors
- Simply pass adjusted_mode in bridge mode set.
- Remove bridge_enable/disable mutex protection, not needed.
- There's no need to set ->edid to NULL when remove the driver.

Changes since v2:
- Nicolas Boichat:
- Get rid of wait_for macro since is only used once.
- Do not replace the error code if it's readily available to you.
- Add Tested-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>
- Add Reviewed-by: Nicolas Boichat <drinkcat@xxxxxxxxxxxx>

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


drivers/gpu/drm/bridge/Kconfig | 10 +
drivers/gpu/drm/bridge/Makefile | 1 +
drivers/gpu/drm/bridge/analogix-anx78xx.c | 1499 +++++++++++++++++++++++++++++
drivers/gpu/drm/bridge/analogix-anx78xx.h | 719 ++++++++++++++
4 files changed, 2229 insertions(+)
create mode 100644 drivers/gpu/drm/bridge/analogix-anx78xx.c
create mode 100644 drivers/gpu/drm/bridge/analogix-anx78xx.h

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig
index 27e2022..f646b2e 100644
--- a/drivers/gpu/drm/bridge/Kconfig
+++ b/drivers/gpu/drm/bridge/Kconfig
@@ -7,6 +7,16 @@ config DRM_BRIDGE
menu "Display Interface Bridges"
depends on DRM && DRM_BRIDGE

+config DRM_ANALOGIX_ANX78XX
+ tristate "Analogix ANX78XX bridge"
+ select DRM_KMS_HELPER
+ select REGMAP_I2C
+ ---help---
+ ANX78XX is an ultra-low Full-HD SlimPort transmitter
+ designed for portable devices. The ANX78XX transforms
+ the HDMI output of an application processor to MyDP
+ or DisplayPort.
+
config DRM_DW_HDMI
tristate
select DRM_KMS_HELPER
diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile
index f13c33d..62c2251 100644
--- a/drivers/gpu/drm/bridge/Makefile
+++ b/drivers/gpu/drm/bridge/Makefile
@@ -1,5 +1,6 @@
ccflags-y := -Iinclude/drm

+obj-$(CONFIG_DRM_ANALOGIX_ANX78XX) += analogix-anx78xx.o
obj-$(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
diff --git a/drivers/gpu/drm/bridge/analogix-anx78xx.c b/drivers/gpu/drm/bridge/analogix-anx78xx.c
new file mode 100644
index 0000000..6cfbbf6
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix-anx78xx.c
@@ -0,0 +1,1499 @@
+/*
+ * 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/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 <linux/regulator/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 "analogix-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
+
+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 regulator *dvdd10;
+ struct gpio_desc *gpiod_hpd;
+ struct gpio_desc *gpiod_pd;
+ struct gpio_desc *gpiod_reset;
+
+ 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 inline struct anx78xx *connector_to_anx78xx(struct drm_connector *c)
+{
+ return container_of(c, struct anx78xx, connector);
+}
+
+static inline struct anx78xx *bridge_to_anx78xx(struct drm_bridge *bridge)
+{
+ return container_of(bridge, struct anx78xx, bridge);
+}
+
+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 bool 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 || (aux_ctrl & SP_AUX_EN))
+ return false;
+
+ return true;
+}
+
+static int anx78xx_aux_wait(struct anx78xx *anx78xx)
+{
+ int err;
+ unsigned int status;
+ unsigned long timeout;
+
+ timeout = jiffies + msecs_to_jiffies(AUX_WAIT_TIMEOUT_MS) + 1;
+ while (!anx78xx_aux_op_finished(anx78xx)) {
+ if (time_after(jiffies, timeout)) {
+ if (!anx78xx_aux_op_finished(anx78xx)) {
+ DRM_ERROR("Timed out waiting AUX to finish\n");
+ return -ETIMEDOUT;
+ }
+ break;
+ }
+ usleep_range(1000, 2000);
+ }
+
+ /* Read the AUX channel access status */
+ err = regmap_read(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_CH_STATUS_REG,
+ &status);
+ if (err || (status & SP_AUX_STATUS)) {
+ DRM_ERROR("Failed to read AUX channel: 0x%02x (err: %d)\n",
+ status, err);
+ return -ETIMEDOUT;
+ }
+
+ return 0;
+}
+
+static int anx78xx_aux_address(struct anx78xx *anx78xx, unsigned int addr)
+{
+ int err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_ADDR_7_0_REG,
+ addr & 0xff);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_ADDR_15_8_REG,
+ (addr & 0xff00) >> 8);
+ if (err)
+ return err;
+
+ /*
+ * 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 err;
+
+ return 0;
+}
+
+static ssize_t anx78xx_aux_transfer(struct drm_dp_aux *aux,
+ struct drm_dp_aux_msg *msg)
+{
+ int err;
+ 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 err;
+ }
+
+ /* Write address and request */
+ err = anx78xx_aux_address(anx78xx, msg->address);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL1_REG,
+ ctrl1);
+ if (err)
+ return err;
+
+ /* Start transaction */
+ err = regmap_update_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_AUX_CH_CTRL2_REG, SP_ADDR_ONLY |
+ SP_AUX_EN, ctrl2);
+ if (err)
+ return err;
+
+ err = anx78xx_aux_wait(anx78xx);
+ if (err)
+ return err;
+
+ msg->reply = 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 err;
+ }
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_AUX_CH_CTRL2_REG, SP_ADDR_ONLY);
+ if (err)
+ return err;
+
+ return msg->size;
+}
+
+static int anx78xx_set_hpd(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
+ SP_HPD_OUT);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_clear_hpd(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL3_REG,
+ SP_HPD_OUT);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_TMDS_CTRL_BASE + 7, SP_PD_RT);
+ if (err)
+ return err;
+
+ 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;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
+ SP_AUD_MUTE | SP_VID_MUTE);
+ if (err)
+ return err;
+
+ 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);
+ if (err)
+ return err;
+
+ 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);
+ if (err)
+ return err;
+
+ 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);
+ if (err)
+ return err;
+
+ /* 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));
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_AUD_EXCEPTION_ENABLE_BASE + 3,
+ SP_AEC_EN21);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0], SP_AUDVID_CTRL_REG,
+ SP_AVC_EN | SP_AAC_OE | SP_AAC_EN);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_SYSTEM_POWER_DOWN1_REG, SP_PWDN_CTRL);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_RX_P0],
+ SP_VID_DATA_RANGE_CTRL_REG, SP_R2Y_INPUT_LIMIT);
+ if (err)
+ return err;
+
+ /* Enable DDC stretch */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_EXTRA_I2C_DEV_ADDR_REG, SP_I2C_EXTRA_ADDR);
+ if (err)
+ return err;
+
+ /* TMDS phy initialization */
+ err = regmap_multi_reg_write(anx78xx->map[I2C_IDX_RX_P0],
+ tmds_phy_initialization,
+ ARRAY_SIZE(tmds_phy_initialization));
+ if (err)
+ return err;
+
+ err = anx78xx_clear_hpd(anx78xx);
+ if (err)
+ return err;
+
+ 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;
+
+ /*
+ * 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);
+ if (err)
+ return err;
+
+ /*
+ * 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 err;
+
+ return 0;
+}
+
+static int anx78xx_xtal_clk_sel(struct anx78xx *anx78xx)
+{
+ int err;
+ 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);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL3_REG,
+ XTAL_CLK & SP_WAIT_COUNTER_7_0_MASK);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL4_REG,
+ ((XTAL_CLK & 0xff00) >> 2) | (XTAL_CLK / 10));
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_I2C_GEN_10US_TIMER0_REG, XTAL_CLK & 0xff);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0],
+ SP_I2C_GEN_10US_TIMER1_REG,
+ (XTAL_CLK & 0xff00) >> 8);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_MISC_CTRL_REG,
+ XTAL_CLK / 10 - 1);
+ if (err)
+ return err;
+
+ err = regmap_read(anx78xx->map[I2C_IDX_RX_P0],
+ SP_HDMI_US_TIMER_CTRL_REG,
+ &regval);
+ if (err)
+ return err;
+
+ 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 err;
+
+ 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;
+
+ /* Set terminal resistor to 50 ohm */
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_DP_AUX_CH_CTRL2_REG,
+ 0x30);
+ if (err)
+ return err;
+
+ /* Enable aux double diff output */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_AUX_CH_CTRL2_REG, 0x08);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_HDCP_CTRL_REG, SP_AUTO_EN |
+ SP_AUTO_START);
+ if (err)
+ return err;
+
+ err = regmap_multi_reg_write(anx78xx->map[I2C_IDX_TX_P0],
+ otp_key_protect,
+ ARRAY_SIZE(otp_key_protect));
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_HDCP_KEY_COMMAND_REG, SP_DISABLE_SYNC_HDCP);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL8_REG,
+ SP_VID_VRES_TH);
+ if (err)
+ return err;
+
+ /*
+ * 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);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_HDCP_CTRL_REG, SP_LINK_POLLING);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_LINK_DEBUG_CTRL_REG, SP_M_VID_DEBUG);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_ANALOG_DEBUG2_REG, SP_POWERON_TIME_1P5MS);
+ if (err)
+ return err;
+
+ err = anx78xx_xtal_clk_sel(anx78xx);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P0], SP_AUX_DEFER_CTRL_REG,
+ SP_DEFER_CTRL_EN | 0x0c);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_POLLING_CTRL_REG,
+ SP_AUTO_POLLING_DISABLE);
+ if (err)
+ return err;
+
+ /*
+ * 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);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_DP_MISC_CTRL_REG, SP_EQ_TRAINING_LOOP);
+ if (err)
+ return err;
+
+ /* 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);
+ if (err)
+ return err;
+
+ err = anx78xx_link_phy_initialization(anx78xx);
+ if (err)
+ return err;
+
+ /* 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 err;
+
+ return 0;
+}
+
+static int anx78xx_enable_interrupts(struct anx78xx *anx78xx)
+{
+ int err;
+
+ /*
+ * 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);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2],
+ SP_COMMON_INT_MASK4_REG, SP_HPD_LOST | SP_HPD_PLUG);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_TX_P2], SP_DP_INT_MASK1_REG,
+ SP_TRAINING_FINISH);
+ if (err)
+ return err;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_INT_MASK1_REG,
+ SP_CKDT_CHG | SP_SCDT_CHG);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static void anx78xx_poweron(struct anx78xx *anx78xx)
+{
+ int err;
+ struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+
+ if (WARN_ON(anx78xx->powered))
+ return;
+
+ if (pdata->dvdd10) {
+ err = regulator_enable(pdata->dvdd10);
+ if (err) {
+ DRM_ERROR("Failed to enable DVDD10 regulator: %d\n",
+ err);
+ return;
+ }
+
+ 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)
+{
+ int err;
+ 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->dvdd10) {
+ err = regulator_disable(pdata->dvdd10);
+ if (err) {
+ DRM_ERROR("Failed to disable DVDD10 regulator: %d\n",
+ err);
+ return;
+ }
+
+ usleep_range(1000, 2000);
+ }
+
+ anx78xx->powered = false;
+}
+
+static int anx78xx_start(struct anx78xx *anx78xx)
+{
+ int err;
+
+ /* 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);
+ if (err) {
+ DRM_ERROR("Failed to enable interrupts: %d\n", err);
+ goto err_poweroff;
+ }
+
+ err = anx78xx_rx_initialization(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed receiver initialization: %d\n", err);
+ goto err_poweroff;
+ }
+
+ err = anx78xx_tx_initialization(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed transmitter initialization: %d\n", err);
+ goto err_poweroff;
+ }
+
+ /*
+ * 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;
+
+err_poweroff:
+ DRM_ERROR("Failed SlimPort transmitter initialization: %d\n", err);
+ anx78xx_poweroff(anx78xx);
+
+ return err;
+}
+
+static int anx78xx_init_pdata(struct anx78xx *anx78xx)
+{
+ struct device *dev = &anx78xx->client->dev;
+ struct anx78xx_platform_data *pdata = &anx78xx->pdata;
+
+ /* 1.0V digital core power regulator (optional) */
+ pdata->dvdd10 = devm_regulator_get(dev, "dvdd10");
+ if (IS_ERR(pdata->dvdd10)) {
+ DRM_INFO("DVDD10 regulator not found\n");
+ pdata->dvdd10 = NULL;
+ }
+
+ /* 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);
+
+ return PTR_ERR_OR_ZERO(pdata->gpiod_reset);
+}
+
+static int anx78xx_dp_link_training(struct anx78xx *anx78xx)
+{
+ int err;
+ u8 dp_bw, regval;
+
+ err = regmap_write(anx78xx->map[I2C_IDX_RX_P0], SP_HDMI_MUTE_CTRL_REG,
+ 0x0);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_POWERDOWN_CTRL_REG,
+ SP_TOTAL_PD);
+ if (err)
+ return err;
+
+ 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("DP bandwidth (0x%02x) not supported\n", dp_bw);
+ return -EINVAL;
+ }
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+ SP_VIDEO_MUTE);
+ if (err)
+ return err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2],
+ SP_VID_CTRL1_REG, SP_VIDEO_EN);
+ if (err)
+ return err;
+
+ /* 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: %d\n", err);
+ 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 err;
+
+ /* Check link capabilities */
+ err = drm_dp_link_probe(&anx78xx->aux, &anx78xx->link);
+ if (err < 0) {
+ DRM_ERROR("Failed to probe link capabilities: %d\n", err);
+ 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: %d\n", err);
+ 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 err;
+
+ if (anx78xx->dpcd[DP_MAX_DOWNSPREAD] & DP_PERCENT_DOWNSPREAD_0_5) {
+ 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 err;
+
+ 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 err;
+
+ 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 err;
+
+ err = drm_dp_link_configure(&anx78xx->aux, &anx78xx->link);
+ if (err < 0) {
+ DRM_ERROR("Failed to configure DisplayPort link: %d\n", err);
+ 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 err;
+
+ return 0;
+}
+
+static int anx78xx_config_dp_output(struct anx78xx *anx78xx)
+{
+ int err;
+
+ err = anx78xx_clear_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+ SP_VIDEO_MUTE);
+ if (err)
+ return err;
+
+ /* Enable DP output */
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P2], SP_VID_CTRL1_REG,
+ SP_VIDEO_EN);
+ if (err)
+ return err;
+
+ 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);
+ if (err)
+ return err;
+
+ err = regmap_bulk_write(anx78xx->map[I2C_IDX_TX_P2],
+ SP_INFOFRAME_AVI_DB1_REG, buffer,
+ frame->length);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_UD);
+ if (err)
+ return err;
+
+ err = anx78xx_set_bits(anx78xx->map[I2C_IDX_TX_P0],
+ SP_PACKET_SEND_CTRL_REG, SP_AVI_IF_EN);
+ if (err)
+ return err;
+
+ return 0;
+}
+
+static int anx78xx_get_downstream_info(struct anx78xx *anx78xx)
+{
+ int err;
+ u8 regval;
+
+ err = drm_dp_dpcd_readb(&anx78xx->aux, DP_SINK_COUNT, &regval);
+ 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: %d\n", err);
+ 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 = connector_to_anx78xx(connector);
+
+ if (!gpiod_get_value(anx78xx->pdata.gpiod_hpd))
+ 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 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;
+
+ return true;
+}
+
+static void anx78xx_bridge_disable(struct drm_bridge *bridge)
+{
+ struct anx78xx *anx78xx = bridge_to_anx78xx(bridge);
+
+ /* 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);
+}
+
+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);
+
+ err = drm_hdmi_avi_infoframe_from_display_mode(&frame, adjusted_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);
+
+ err = anx78xx_start(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to initialize: %d\n", err);
+ return;
+ }
+
+ err = anx78xx_set_hpd(anx78xx);
+ if (err)
+ DRM_ERROR("Failed to set HPD: %d\n", err);
+}
+
+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 irq, 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);
+ /* Free cached EDID */
+ kfree(anx78xx->edid);
+ anx78xx->edid = NULL;
+ } else if (irq & SP_HPD_PLUG) {
+ DRM_DEBUG_KMS("IRQ: Hot plug detect - cable plug\n");
+ event = true;
+ }
+
+ 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, &regval);
+ 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)
+{
+ unsigned 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;
+ unsigned int i, 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_pdata(anx78xx);
+ if (err) {
+ DRM_ERROR("Failed to initialize pdata: %d\n", err);
+ 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: %d\n",
+ err);
+ 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: %d\n", err);
+ 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: %d\n", err);
+ 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);
+
+ 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.balletbo@xxxxxxxxxxxxx>");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/gpu/drm/bridge/analogix-anx78xx.h b/drivers/gpu/drm/bridge/analogix-anx78xx.h
new file mode 100644
index 0000000..38753c8
--- /dev/null
+++ b/drivers/gpu/drm/bridge/analogix-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