[PATCH 5/9] phy: dwc: Add Synopsys DesignWare HDMI RX PHYs e405 and e406 Driver
From: Nelson Costa
Date: Wed Jun 02 2021 - 07:25:25 EST
This adds support for the Synopsys DesignWare HDMI RX PHYs e405 and e406.
The PHY receives and decodes HDMI video that is delivered to a controller.
Main features included in this driver are:
- Equalizer algorithm that chooses the PHY best settings
according to the detected HDMI cable characteristics.
- Support for scrambling
- Support for color depth up to 48bpp
- Support for HDMI 2.0 modes up to 6G (HDMI 4k@60Hz).
The driver was implemented using the standard PHY API in order to
provide a standard access to the required callbacks to be handled
by the controller through the phy_ops.
There is a bidirectional communication between controller and PHY:
- controller -> PHY : communication is done using the PHY API
- controller <- PHY : communication is done using the callbacks,
provided by the controller, which are required to handle the PHY
such as: read/write, pddq, reset, etc.
This callback functions are specified in struct dw_phy_pdata from
'include/linux/phy/dwc/dw-hdmi-phy-pdata.h'.
Signed-off-by: Jose Abreu <jose.abreu@xxxxxxxxxxxx>
Signed-off-by: Nelson Costa <nelson.costa@xxxxxxxxxxxx>
---
drivers/phy/Kconfig | 1 +
drivers/phy/Makefile | 1 +
drivers/phy/dwc/Kconfig | 20 ++
drivers/phy/dwc/Makefile | 9 +
drivers/phy/dwc/phy-dw-hdmi-e405.c | 497 +++++++++++++++++++++++++++++
drivers/phy/dwc/phy-dw-hdmi-e406.c | 475 +++++++++++++++++++++++++++
drivers/phy/dwc/phy-dw-hdmi-e40x-core.c | 514 ++++++++++++++++++++++++++++++
drivers/phy/dwc/phy-dw-hdmi-e40x.h | 219 +++++++++++++
include/linux/phy/dwc/dw-hdmi-phy-pdata.h | 73 +++++
9 files changed, 1809 insertions(+)
create mode 100644 drivers/phy/dwc/Kconfig
create mode 100644 drivers/phy/dwc/Makefile
create mode 100644 drivers/phy/dwc/phy-dw-hdmi-e405.c
create mode 100644 drivers/phy/dwc/phy-dw-hdmi-e406.c
create mode 100644 drivers/phy/dwc/phy-dw-hdmi-e40x-core.c
create mode 100644 drivers/phy/dwc/phy-dw-hdmi-e40x.h
create mode 100644 include/linux/phy/dwc/dw-hdmi-phy-pdata.h
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 68d9c2f..db7c4b1 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -65,6 +65,7 @@ source "drivers/phy/allwinner/Kconfig"
source "drivers/phy/amlogic/Kconfig"
source "drivers/phy/broadcom/Kconfig"
source "drivers/phy/cadence/Kconfig"
+source "drivers/phy/dwc/Kconfig"
source "drivers/phy/freescale/Kconfig"
source "drivers/phy/hisilicon/Kconfig"
source "drivers/phy/ingenic/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 32261e1..ac63979 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -13,6 +13,7 @@ obj-y += allwinner/ \
amlogic/ \
broadcom/ \
cadence/ \
+ dwc/ \
freescale/ \
hisilicon/ \
ingenic/ \
diff --git a/drivers/phy/dwc/Kconfig b/drivers/phy/dwc/Kconfig
new file mode 100644
index 0000000..ab451d8
--- /dev/null
+++ b/drivers/phy/dwc/Kconfig
@@ -0,0 +1,20 @@
+# SPDX-License-Identifier: GPL-2.0
+config VIDEO_DWC_HDMI_PHY_E40X
+ tristate "Synopsys DesignWare HDMI RX PHYs e405 and e406 driver"
+ select GENERIC_PHY
+ help
+ Support for Synopsys DesignWare HDMI RX PHYs versions
+ e405 and e406.
+
+ To compile this driver as a module, choose M here. The module
+ will be called phy-dw-hdmi-e40x.
+
+config VIDEO_DWC_HDMI_PHY_E40X_SUPPORT_TESTCHIP
+ bool "Synopsys DesignWare HDMI RX PHYs e405/e406 Test Chip Support"
+ depends on VIDEO_DWC_HDMI_PHY_E40X
+ help
+ Support for Synopsys DesignWare HDMI RX PHYs e405/e406 with Test Chip.
+
+ To have support for HDMI RX PHYs e405/e406 Test Chip, choose Y here.
+ It will enable Test Chip additional requirements, for example enable
+ the z calibration requirement during the PHY configuration.
diff --git a/drivers/phy/dwc/Makefile b/drivers/phy/dwc/Makefile
new file mode 100644
index 0000000..52a5b6b
--- /dev/null
+++ b/drivers/phy/dwc/Makefile
@@ -0,0 +1,9 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the PHY drivers.
+#
+
+phy-dw-hdmi-e40x-y := phy-dw-hdmi-e40x-core.o
+phy-dw-hdmi-e40x-y += phy-dw-hdmi-e405.o
+phy-dw-hdmi-e40x-y += phy-dw-hdmi-e406.o
+obj-$(CONFIG_VIDEO_DWC_HDMI_PHY_E40X) += phy-dw-hdmi-e40x.o
diff --git a/drivers/phy/dwc/phy-dw-hdmi-e405.c b/drivers/phy/dwc/phy-dw-hdmi-e405.c
new file mode 100644
index 0000000..5078a86
--- /dev/null
+++ b/drivers/phy/dwc/phy-dw-hdmi-e405.c
@@ -0,0 +1,497 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 - present Synopsys, Inc. and/or its affiliates.
+ * Synopsys DesignWare HDMI PHY e405
+ *
+ * Author: Jose Abreu <jose.abreu@xxxxxxxxxxxx>
+ * Author: Nelson Costa <nelson.costa@xxxxxxxxxxxx>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/phy/dwc/dw-hdmi-phy-pdata.h>
+
+#include "phy-dw-hdmi-e40x.h"
+
+#define DW_PHY_EQ_WAIT_TIME_START 3
+#define DW_PHY_EQ_SLEEP_TIME_CDR 30
+#define DW_PHY_EQ_SLEEP_TIME_ACQ 1
+#define DW_PHY_EQ_BOUNDSPREAD 20
+#define DW_PHY_EQ_MIN_ACQ_STABLE 3
+#define DW_PHY_EQ_ACC_LIMIT 360
+#define DW_PHY_EQ_ACC_MIN_LIMIT 0
+#define DW_PHY_EQ_MAX_SETTING 13
+#define DW_PHY_EQ_SHORT_CABLE_SETTING 4
+#define DW_PHY_EQ_ERROR_CABLE_SETTING 4
+#define DW_PHY_EQ_MIN_SLOPE 50
+#define DW_PHY_EQ_AVG_ACQ 5
+#define DW_PHY_EQ_MINMAX_NTRIES 3
+#define DW_PHY_EQ_COUNTER_VAL 512
+#define DW_PHY_EQ_COUNTER_VAL_HDMI20 512
+#define DW_PHY_EQ_MINMAX_MAXDIFF 4
+#define DW_PHY_EQ_MINMAX_MAXDIFF_HDMI20 2
+#define DW_PHY_EQ_FATBIT_MASK 0x0000
+#define DW_PHY_EQ_FATBIT_MASK_4K 0x0c03
+#define DW_PHY_EQ_FATBIT_MASK_HDMI20 0x0e03
+
+/* PHY e405 mpll configuration */
+static const struct dw_phy_mpll_config dw_phy_e405_mpll_cfg[] = {
+ { 0x27, 0x1B94 },
+ { 0x28, 0x16D2 },
+ { 0x29, 0x12D9 },
+ { 0x2A, 0x3249 },
+ { 0x2B, 0x3653 },
+ { 0x2C, 0x3436 },
+ { 0x2D, 0x124D },
+ { 0x2E, 0x0001 },
+ { 0xCE, 0x0505 },
+ { 0xCF, 0x0505 },
+ { 0xD0, 0x0000 },
+ { 0x00, 0x0000 },
+};
+
+/* PHY e405 equalization functions */
+static int dw_phy_eq_test(struct dw_phy_dev *dw_dev,
+ u16 *fat_bit_mask, int *min_max_length)
+{
+ u16 main_fsm_status, val;
+ unsigned int i;
+
+ for (i = 0; i < DW_PHY_EQ_WAIT_TIME_START; i++) {
+ main_fsm_status = dw_phy_read(dw_dev, DW_PHY_MAINFSM_STATUS1);
+ if (main_fsm_status & DW_PHY_CLOCK_STABLE)
+ break;
+ mdelay(DW_PHY_EQ_SLEEP_TIME_CDR);
+ }
+
+ if (i == DW_PHY_EQ_WAIT_TIME_START) {
+ dev_dbg(dw_dev->dev, "PHY start conditions not achieved\n");
+ return -ETIMEDOUT;
+ }
+
+ if (main_fsm_status & DW_PHY_PLL_RATE_BIT1) {
+ dev_dbg(dw_dev->dev, "invalid pll rate\n");
+ return -EINVAL;
+ }
+
+ val = dw_phy_read(dw_dev, DW_PHY_CDR_CTRL_CNT) &
+ DW_PHY_HDMI_MHL_MODE_MASK;
+ if (val == DW_PHY_HDMI_MHL_MODE_ABOVE_3_4G_BITPS) {
+ /* HDMI 2.0 */
+ *fat_bit_mask = DW_PHY_EQ_FATBIT_MASK_HDMI20;
+ *min_max_length = DW_PHY_EQ_MINMAX_MAXDIFF_HDMI20;
+ dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 2.0 values\n");
+ } else if (!(main_fsm_status & DW_PHY_PLL_RATE_MASK)) {
+ /* HDMI 1.4 (pll rate = 0) */
+ *fat_bit_mask = DW_PHY_EQ_FATBIT_MASK_4K;
+ *min_max_length = DW_PHY_EQ_MINMAX_MAXDIFF;
+ dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4@4k values\n");
+ } else {
+ /* HDMI 1.4 */
+ *fat_bit_mask = DW_PHY_EQ_FATBIT_MASK;
+ *min_max_length = DW_PHY_EQ_MINMAX_MAXDIFF;
+ dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4 values\n");
+ }
+
+ return 0;
+}
+
+static void dw_phy_eq_default(struct dw_phy_dev *dw_dev)
+{
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_LOOP_CTR_LIMIT(8) |
+ DW_PHY_CH0_MSTR_CTR_LIMIT(10) |
+ DW_PHY_CH0_ADAP_COMP_LIMIT(4)), DW_PHY_CH0_EQ_CTRL1);
+ dw_phy_write(dw_dev, DW_PHY_CH0_LB_ACTIVE_OVR, DW_PHY_CH0_EQ_CTRL2);
+
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH1_LOOP_CTR_LIMIT(8) |
+ DW_PHY_CH1_MSTR_CTR_LIMIT(10) |
+ DW_PHY_CH1_ADAP_COMP_LIMIT(4)), DW_PHY_CH1_EQ_CTRL1);
+ dw_phy_write(dw_dev, DW_PHY_CH1_LB_ACTIVE_OVR, DW_PHY_CH1_EQ_CTRL2);
+
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH2_LOOP_CTR_LIMIT(8) |
+ DW_PHY_CH2_MSTR_CTR_LIMIT(10) |
+ DW_PHY_CH2_ADAP_COMP_LIMIT(4)), DW_PHY_CH2_EQ_CTRL1);
+ dw_phy_write(dw_dev, DW_PHY_CH2_LB_ACTIVE_OVR, DW_PHY_CH2_EQ_CTRL2);
+}
+
+static void dw_phy_eq_single(struct dw_phy_dev *dw_dev)
+{
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_LOOP_CTR_LIMIT(1) |
+ DW_PHY_CH0_MSTR_CTR_LIMIT(1) |
+ DW_PHY_CH0_ADAP_COMP_LIMIT(1)), DW_PHY_CH0_EQ_CTRL1);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH1_LOOP_CTR_LIMIT(1) |
+ DW_PHY_CH1_MSTR_CTR_LIMIT(1) |
+ DW_PHY_CH1_ADAP_COMP_LIMIT(1)), DW_PHY_CH1_EQ_CTRL1);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH2_LOOP_CTR_LIMIT(1) |
+ DW_PHY_CH2_MSTR_CTR_LIMIT(1) |
+ DW_PHY_CH2_ADAP_COMP_LIMIT(1)), DW_PHY_CH2_EQ_CTRL1);
+}
+
+static void dw_phy_eq_equal_setting_ch0(struct dw_phy_dev *dw_dev,
+ u16 lock_vector)
+{
+ dw_phy_write(dw_dev, lock_vector, DW_PHY_CH0_EQ_CTRL4);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH0_LB_ACTIVE_OVR), DW_PHY_CH0_EQ_CTRL2);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_OVRD_LOCK |
+ DW_PHY_CH0_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH0_LB_ACTIVE_OVR), DW_PHY_CH0_EQ_CTRL2);
+ dw_phy_read(dw_dev, DW_PHY_CH0_EQ_STATUS2);
+}
+
+static void dw_phy_eq_equal_setting_ch1(struct dw_phy_dev *dw_dev,
+ u16 lock_vector)
+{
+ dw_phy_write(dw_dev, lock_vector, DW_PHY_CH1_EQ_CTRL4);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH1_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH1_LB_ACTIVE_OVR), DW_PHY_CH1_EQ_CTRL2);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH1_OVRD_LOCK |
+ DW_PHY_CH1_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH1_LB_ACTIVE_OVR), DW_PHY_CH1_EQ_CTRL2);
+ dw_phy_read(dw_dev, DW_PHY_CH1_EQ_STATUS2);
+}
+
+static void dw_phy_eq_equal_setting_ch2(struct dw_phy_dev *dw_dev,
+ u16 lock_vector)
+{
+ dw_phy_write(dw_dev, lock_vector, DW_PHY_CH2_EQ_CTRL4);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH2_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH2_LB_ACTIVE_OVR), DW_PHY_CH2_EQ_CTRL2);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH2_OVRD_LOCK |
+ DW_PHY_CH2_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH2_LB_ACTIVE_OVR), DW_PHY_CH2_EQ_CTRL2);
+ dw_phy_read(dw_dev, DW_PHY_CH2_EQ_STATUS2);
+}
+
+static void dw_phy_eq_equal_setting(struct dw_phy_dev *dw_dev, u16 lock_vector)
+{
+ dw_phy_eq_equal_setting_ch0(dw_dev, lock_vector);
+ dw_phy_eq_equal_setting_ch1(dw_dev, lock_vector);
+ dw_phy_eq_equal_setting_ch2(dw_dev, lock_vector);
+}
+
+static void dw_phy_eq_auto_calib(struct dw_phy_dev *dw_dev)
+{
+ dw_phy_write(dw_dev,
+ (DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE |
+ DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE |
+ DW_PHY_FORCE_STATE_DIS |
+ DW_PHY_MAIN_FSM_STATE(9)), DW_PHY_MAINFSM_CTRL);
+ dw_phy_write(dw_dev,
+ (DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE |
+ DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE |
+ DW_PHY_FORCE_STATE_EN |
+ DW_PHY_MAIN_FSM_STATE(9)), DW_PHY_MAINFSM_CTRL);
+ dw_phy_write(dw_dev,
+ (DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE |
+ DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE |
+ DW_PHY_FORCE_STATE_DIS |
+ DW_PHY_MAIN_FSM_STATE(9)), DW_PHY_MAINFSM_CTRL);
+}
+
+static void dw_phy_eq_init_vars(struct dw_phy_eq_ch *ch)
+{
+ ch->acc = 0;
+ ch->acq = 0;
+ ch->last_acq = 0;
+ ch->valid_long_setting = 0;
+ ch->valid_short_setting = 0;
+ ch->best_setting = DW_PHY_EQ_SHORT_CABLE_SETTING;
+}
+
+static bool dw_phy_eq_acquire_early_cnt(struct dw_phy_dev *dw_dev,
+ u16 setting, u16 acq,
+ struct dw_phy_eq_ch *ch0,
+ struct dw_phy_eq_ch *ch1,
+ struct dw_phy_eq_ch *ch2)
+{
+ u16 lock_vector = 0x1 << setting;
+ unsigned int i;
+
+ ch0->out_bound_acq = 0;
+ ch1->out_bound_acq = 0;
+ ch2->out_bound_acq = 0;
+ ch0->acq = 0;
+ ch1->acq = 0;
+ ch2->acq = 0;
+
+ dw_phy_eq_equal_setting(dw_dev, lock_vector);
+ dw_phy_eq_auto_calib(dw_dev);
+
+ mdelay(DW_PHY_EQ_SLEEP_TIME_CDR);
+ if (!dw_phy_tmds_valid(dw_dev))
+ dev_dbg(dw_dev->dev, "TMDS is NOT valid\n");
+
+ ch0->read_acq = dw_phy_read(dw_dev, DW_PHY_CH0_EQ_STATUS3);
+ ch1->read_acq = dw_phy_read(dw_dev, DW_PHY_CH1_EQ_STATUS3);
+ ch2->read_acq = dw_phy_read(dw_dev, DW_PHY_CH2_EQ_STATUS3);
+
+ ch0->acq += ch0->read_acq;
+ ch1->acq += ch1->read_acq;
+ ch2->acq += ch2->read_acq;
+
+ ch0->upper_bound_acq = ch0->read_acq + DW_PHY_EQ_BOUNDSPREAD;
+ ch0->lower_bound_acq = ch0->read_acq - DW_PHY_EQ_BOUNDSPREAD;
+ ch1->upper_bound_acq = ch1->read_acq + DW_PHY_EQ_BOUNDSPREAD;
+ ch1->lower_bound_acq = ch1->read_acq - DW_PHY_EQ_BOUNDSPREAD;
+ ch2->upper_bound_acq = ch2->read_acq + DW_PHY_EQ_BOUNDSPREAD;
+ ch2->lower_bound_acq = ch2->read_acq - DW_PHY_EQ_BOUNDSPREAD;
+
+ for (i = 1; i < acq; i++) {
+ dw_phy_eq_auto_calib(dw_dev);
+ mdelay(DW_PHY_EQ_SLEEP_TIME_ACQ);
+
+ if (ch0->read_acq > ch0->upper_bound_acq ||
+ ch0->read_acq < ch0->lower_bound_acq)
+ ch0->out_bound_acq++;
+ if (ch1->read_acq > ch1->upper_bound_acq ||
+ ch1->read_acq < ch1->lower_bound_acq)
+ ch1->out_bound_acq++;
+ if (ch2->read_acq > ch2->upper_bound_acq ||
+ ch2->read_acq < ch2->lower_bound_acq)
+ ch2->out_bound_acq++;
+
+ if (i == DW_PHY_EQ_MIN_ACQ_STABLE) {
+ if (!ch0->out_bound_acq &&
+ !ch1->out_bound_acq &&
+ !ch2->out_bound_acq) {
+ acq = 3;
+ break;
+ }
+ }
+
+ ch0->read_acq = dw_phy_read(dw_dev, DW_PHY_CH0_EQ_STATUS3);
+ ch1->read_acq = dw_phy_read(dw_dev, DW_PHY_CH1_EQ_STATUS3);
+ ch2->read_acq = dw_phy_read(dw_dev, DW_PHY_CH2_EQ_STATUS3);
+
+ ch0->acq += ch0->read_acq;
+ ch1->acq += ch1->read_acq;
+ ch2->acq += ch2->read_acq;
+ }
+
+ ch0->acq /= acq;
+ ch1->acq /= acq;
+ ch2->acq /= acq;
+
+ return true;
+}
+
+static int dw_phy_eq_test_type(u16 setting, bool tmds_valid,
+ struct dw_phy_eq_ch *ch)
+{
+ u16 step_slope = 0;
+
+ if (ch->acq < ch->last_acq && tmds_valid) {
+ /* Long cable equalization */
+ ch->acc += ch->last_acq - ch->acq;
+ if (!ch->valid_long_setting && ch->acq < 512 && ch->acc) {
+ ch->best_long_setting = setting;
+ ch->valid_long_setting = 1;
+ }
+ step_slope = ch->last_acq - ch->acq;
+ }
+
+ if (tmds_valid && !ch->valid_short_setting) {
+ /* Short cable equalization */
+ if (setting < DW_PHY_EQ_SHORT_CABLE_SETTING &&
+ ch->acq < DW_PHY_EQ_COUNTER_VAL) {
+ ch->best_short_setting = setting;
+ ch->valid_short_setting = 1;
+ }
+
+ if (setting == DW_PHY_EQ_SHORT_CABLE_SETTING) {
+ ch->best_short_setting = DW_PHY_EQ_SHORT_CABLE_SETTING;
+ ch->valid_short_setting = 1;
+ }
+ }
+
+ if (ch->valid_long_setting && ch->acc > DW_PHY_EQ_ACC_LIMIT) {
+ ch->best_setting = ch->best_long_setting;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_LONG;
+ }
+
+ if (setting == DW_PHY_EQ_MAX_SETTING && ch->acc < DW_PHY_EQ_ACC_LIMIT &&
+ ch->valid_short_setting) {
+ ch->best_setting = ch->best_short_setting;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_SHORT;
+ }
+
+ if (setting == DW_PHY_EQ_MAX_SETTING && tmds_valid &&
+ ch->acc > DW_PHY_EQ_ACC_LIMIT &&
+ step_slope > DW_PHY_EQ_MIN_SLOPE) {
+ ch->best_setting = DW_PHY_EQ_MAX_SETTING;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_MAX;
+ }
+
+ if (setting == DW_PHY_EQ_MAX_SETTING) {
+ ch->best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR;
+ }
+
+ return 0;
+}
+
+static bool dw_phy_eq_setting_finder(struct dw_phy_dev *dw_dev, u16 acq,
+ struct dw_phy_eq_ch *ch0,
+ struct dw_phy_eq_ch *ch1,
+ struct dw_phy_eq_ch *ch2)
+{
+ int ret_ch0 = 0, ret_ch1 = 0, ret_ch2 = 0;
+ bool tmds_valid = false;
+ u16 act = 0;
+
+ dw_phy_eq_init_vars(ch0);
+ dw_phy_eq_init_vars(ch1);
+ dw_phy_eq_init_vars(ch2);
+
+ tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
+ ch0, ch1, ch2);
+
+ while (!ret_ch0 || !ret_ch1 || !ret_ch2) {
+ act++;
+
+ ch0->last_acq = ch0->acq;
+ ch1->last_acq = ch1->acq;
+ ch2->last_acq = ch2->acq;
+
+ tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
+ ch0, ch1, ch2);
+
+ if (!ret_ch0)
+ ret_ch0 = dw_phy_eq_test_type(act, tmds_valid, ch0);
+ if (!ret_ch1)
+ ret_ch1 = dw_phy_eq_test_type(act, tmds_valid, ch1);
+ if (!ret_ch2)
+ ret_ch2 = dw_phy_eq_test_type(act, tmds_valid, ch2);
+ }
+
+ if (ret_ch0 == DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR ||
+ ret_ch1 == DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR ||
+ ret_ch2 == DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR)
+ return false;
+ return true;
+}
+
+static bool dw_phy_eq_maxvsmin(u16 ch0_setting, u16 ch1_setting,
+ u16 ch2_setting, u16 min_max_length)
+{
+ u16 min = ch0_setting, max = ch0_setting;
+
+ if (ch1_setting > max)
+ max = ch1_setting;
+ if (ch2_setting > max)
+ max = ch2_setting;
+ if (ch1_setting < min)
+ min = ch1_setting;
+ if (ch2_setting < min)
+ min = ch2_setting;
+
+ if ((max - min) > min_max_length)
+ return false;
+ return true;
+}
+
+static int dw_phy_eq_init(struct dw_phy_dev *dw_dev, u16 acq, bool force)
+{
+ struct dw_phy_pdata *phy = dw_dev->config;
+ struct dw_phy_eq_ch ch0, ch1, ch2;
+ u16 fat_bit_mask, lock_vector;
+ int min_max_length, ret = 0;
+ u16 mpll_status;
+ unsigned int i;
+
+ if (phy->version < 401)
+ return ret;
+
+ if (!dw_dev->phy_enabled)
+ return -EINVAL;
+
+ mpll_status = dw_phy_read(dw_dev, DW_PHY_CLK_MPLL_STATUS);
+ if (mpll_status == dw_dev->mpll_status && !force)
+ return ret;
+
+ dw_dev->mpll_status = mpll_status;
+
+ dw_phy_write(dw_dev, 0x00, DW_PHY_MAINFSM_OVR2);
+ dw_phy_write(dw_dev, 0x00, DW_PHY_CH0_EQ_CTRL3);
+ dw_phy_write(dw_dev, 0x00, DW_PHY_CH1_EQ_CTRL3);
+ dw_phy_write(dw_dev, 0x00, DW_PHY_CH2_EQ_CTRL3);
+
+ ret = dw_phy_eq_test(dw_dev, &fat_bit_mask, &min_max_length);
+ if (ret) {
+ if (ret == -EINVAL) /* Means equalizer is not needed */
+ ret = 0;
+
+ /* Do not change values if we don't have clock */
+ if (ret != -ETIMEDOUT) {
+ dw_phy_eq_default(dw_dev);
+ dw_phy_pddq(dw_dev, 1);
+ dw_phy_pddq(dw_dev, 0);
+ }
+ } else {
+ dw_phy_eq_single(dw_dev);
+ dw_phy_eq_equal_setting(dw_dev, 0x0001);
+ dw_phy_write(dw_dev, fat_bit_mask, DW_PHY_CH0_EQ_CTRL6);
+ dw_phy_write(dw_dev, fat_bit_mask, DW_PHY_CH1_EQ_CTRL6);
+ dw_phy_write(dw_dev, fat_bit_mask, DW_PHY_CH2_EQ_CTRL6);
+
+ for (i = 0; i < DW_PHY_EQ_MINMAX_NTRIES; i++) {
+ if (dw_phy_eq_setting_finder(dw_dev, acq,
+ &ch0, &ch1, &ch2)) {
+ if (dw_phy_eq_maxvsmin(ch0.best_setting,
+ ch1.best_setting,
+ ch2.best_setting,
+ min_max_length))
+ break;
+ }
+
+ ch0.best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ ch1.best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ ch2.best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ }
+
+ dev_dbg(dw_dev->dev, "equalizer settings: ch0=0x%x, ch1=0x%x, ch1=0x%x\n",
+ ch0.best_setting, ch1.best_setting, ch2.best_setting);
+
+ if (i == DW_PHY_EQ_MINMAX_NTRIES)
+ ret = -EINVAL;
+
+ lock_vector = 0x1 << ch0.best_setting;
+ dw_phy_eq_equal_setting_ch0(dw_dev, lock_vector);
+
+ lock_vector = 0x1 << ch1.best_setting;
+ dw_phy_eq_equal_setting_ch1(dw_dev, lock_vector);
+
+ lock_vector = 0x1 << ch2.best_setting;
+ dw_phy_eq_equal_setting_ch2(dw_dev, lock_vector);
+
+ dw_phy_pddq(dw_dev, 1);
+ dw_phy_pddq(dw_dev, 0);
+ }
+
+ return ret;
+}
+
+/* PHY e405 data */
+const struct dw_hdmi_phy_data dw_phy_e405_data = {
+ .name = "e405",
+ .version = 405,
+ .mpll_cfg = dw_phy_e405_mpll_cfg,
+ .dw_phy_eq_init = dw_phy_eq_init,
+};
diff --git a/drivers/phy/dwc/phy-dw-hdmi-e406.c b/drivers/phy/dwc/phy-dw-hdmi-e406.c
new file mode 100644
index 0000000..d4e2502
--- /dev/null
+++ b/drivers/phy/dwc/phy-dw-hdmi-e406.c
@@ -0,0 +1,475 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 - present Synopsys, Inc. and/or its affiliates.
+ * Synopsys DesignWare HDMI PHY e406
+ *
+ * Author: Nelson Costa <nelson.costa@xxxxxxxxxxxx>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/phy/dwc/dw-hdmi-phy-pdata.h>
+
+#include "phy-dw-hdmi-e40x.h"
+
+/*
+ * Equalization algorithm based on version 01-08-2019
+ * but with the following adjustments related with 1080p and 4k:
+ * - DW_PHY_EQ_MAX_SETTING 14 -> 10
+ * - DW_PHY_EQ_COUNTER_VAL_4K 512 -> 712
+ *
+ */
+#define DW_PHY_EQ_WAIT_TIME_START 3
+#define DW_PHY_EQ_SLEEP_TIME_CDR 17
+#define DW_PHY_EQ_SLEEP_TIME_ACQ 1
+#define DW_PHY_EQ_BOUNDSPREAD 20
+#define DW_PHY_EQ_MIN_ACQ_STABLE 3
+#define DW_PHY_EQ_ACC_LIMIT 360
+#define DW_PHY_EQ_ACC_MIN_LIMIT 0
+#define DW_PHY_EQ_MAX_SETTING 10
+#define DW_PHY_EQ_SHORT_CABLE_SETTING 4
+#define DW_PHY_EQ_ERROR_CABLE_SETTING 4
+#define DW_PHY_EQ_MIN_SLOPE 50
+#define DW_PHY_EQ_AVG_ACQ 3
+#define DW_PHY_EQ_MINMAX_NTRIES 5
+#define DW_PHY_EQ_COUNTER_VAL 712
+#define DW_PHY_EQ_COUNTER_VAL_4K 712
+#define DW_PHY_EQ_COUNTER_VAL_HDMI20 450
+#define DW_PHY_EQ_MINMAX_MAXDIFF 4
+#define DW_PHY_EQ_MINMAX_MAXDIFF_4K 4
+#define DW_PHY_EQ_MINMAX_MAXDIFF_HDMI20 4
+#define DW_PHY_EQ_FATBIT_MASK 0x0c03
+#define DW_PHY_EQ_FATBIT_MASK_4K 0x0c03
+#define DW_PHY_EQ_FATBIT_MASK_HDMI20 0x0e03
+#define DW_PHY_EQ_CDR_PHUG_FRUG 0x251f
+#define DW_PHY_EQ_CDR_PHUG_FRUG_4k 0x001f
+#define DW_PHY_EQ_CDR_PHUG_FRUG_HDMI20 0x001f
+#define DW_PHY_EQ_CDR_PHUG_FRUG_DEF 0x001f
+#define DW_CHX_EQ_CTRL3_MASK 0x0000
+
+/* PHY e406 mpll configuration */
+static const struct dw_phy_mpll_config dw_phy_e406_mpll_cfg[] = {
+ { 0x27, 0x1C94 },
+ { 0x28, 0x3713 },
+ { 0x29, 0x24DA },
+ { 0x2A, 0x5492 },
+ { 0x2B, 0x4B0D },
+ { 0x2C, 0x4760 },
+ { 0x2D, 0x008C },
+ { 0x2E, 0x0010 },
+ { 0x00, 0x0000 },
+};
+
+/* PHY e406 equalization functions */
+static int dw_phy_eq_test(struct dw_phy_dev *dw_dev,
+ u16 *fat_bit_mask, int *min_max_length,
+ u16 *eq_cnt_threshold, u16 *cdr_phug_frug)
+{
+ u16 main_fsm_status, val;
+ unsigned int i;
+
+ for (i = 0; i < DW_PHY_EQ_WAIT_TIME_START; i++) {
+ main_fsm_status = dw_phy_read(dw_dev, DW_PHY_MAINFSM_STATUS1);
+ if (main_fsm_status & DW_PHY_CLOCK_STABLE)
+ break;
+ mdelay(DW_PHY_EQ_SLEEP_TIME_CDR);
+ }
+
+ if (i == DW_PHY_EQ_WAIT_TIME_START) {
+ dev_dbg(dw_dev->dev, "PHY start conditions not achieved\n");
+ return -ETIMEDOUT;
+ }
+
+ if (main_fsm_status & DW_PHY_PLL_RATE_BIT1) {
+ dev_dbg(dw_dev->dev, "invalid pll rate\n");
+ return -EINVAL;
+ }
+
+ val = dw_phy_read(dw_dev, DW_PHY_CDR_CTRL_CNT) &
+ DW_PHY_HDMI_MHL_MODE_MASK;
+ if (val == DW_PHY_HDMI_MHL_MODE_ABOVE_3_4G_BITPS) {
+ /* HDMI 2.0 */
+ *fat_bit_mask = DW_PHY_EQ_FATBIT_MASK_HDMI20;
+ *min_max_length = DW_PHY_EQ_MINMAX_MAXDIFF_HDMI20;
+ *eq_cnt_threshold = DW_PHY_EQ_COUNTER_VAL_HDMI20;
+ *cdr_phug_frug = DW_PHY_EQ_CDR_PHUG_FRUG_HDMI20;
+ dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 2.0 values\n");
+ } else if (!(main_fsm_status & DW_PHY_PLL_RATE_MASK)) {
+ /* HDMI 1.4 (pll rate = 0) */
+ *fat_bit_mask = DW_PHY_EQ_FATBIT_MASK_4K;
+ *min_max_length = DW_PHY_EQ_MINMAX_MAXDIFF_4K;
+ *eq_cnt_threshold = DW_PHY_EQ_COUNTER_VAL_4K;
+ *cdr_phug_frug = DW_PHY_EQ_CDR_PHUG_FRUG_4k;
+ dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4@4k values\n");
+ } else {
+ /* HDMI 1.4 */
+ *fat_bit_mask = DW_PHY_EQ_FATBIT_MASK;
+ *min_max_length = DW_PHY_EQ_MINMAX_MAXDIFF;
+ *eq_cnt_threshold = DW_PHY_EQ_COUNTER_VAL;
+ *cdr_phug_frug = DW_PHY_EQ_CDR_PHUG_FRUG;
+ dev_dbg(dw_dev->dev, "[EQUALIZER] using HDMI 1.4 values\n");
+ }
+
+ return 0;
+}
+
+static void dw_phy_eq_auto_calib(struct dw_phy_dev *dw_dev)
+{
+ dw_phy_write(dw_dev,
+ (DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE |
+ DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE |
+ DW_PHY_FORCE_STATE_DIS |
+ DW_PHY_MAIN_FSM_STATE(9)), DW_PHY_MAINFSM_CTRL);
+ dw_phy_write(dw_dev,
+ (DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE |
+ DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE |
+ DW_PHY_FORCE_STATE_EN |
+ DW_PHY_MAIN_FSM_STATE(9)), DW_PHY_MAINFSM_CTRL);
+ dw_phy_write(dw_dev,
+ (DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE |
+ DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE |
+ DW_PHY_FORCE_STATE_DIS |
+ DW_PHY_MAIN_FSM_STATE(9)), DW_PHY_MAINFSM_CTRL);
+}
+
+static void dw_phy_eq_settings(struct dw_phy_dev *dw_dev, u16 ch0_setting,
+ u16 ch1_setting, u16 ch2_setting)
+{
+ dw_phy_write(dw_dev,
+ (DW_CHX_EQ_CTRL3_MASK |
+ (ch0_setting & DW_PHY_CH0_EXT_EQ_SET_MASK)),
+ DW_PHY_CH0_EQ_CTRL3);
+ dw_phy_write(dw_dev,
+ (DW_CHX_EQ_CTRL3_MASK |
+ (ch1_setting & DW_PHY_CH1_EXT_EQ_SET_MASK)),
+ DW_PHY_CH1_EQ_CTRL3);
+ dw_phy_write(dw_dev,
+ (DW_CHX_EQ_CTRL3_MASK |
+ (ch2_setting & DW_PHY_CH2_EXT_EQ_SET_MASK)),
+ DW_PHY_CH2_EQ_CTRL3);
+ dw_phy_write(dw_dev, DW_PHY_EQ_EN_OVR_EN, DW_PHY_MAINFSM_OVR2);
+
+ dw_phy_eq_auto_calib(dw_dev);
+}
+
+static void dw_phy_eq_default(struct dw_phy_dev *dw_dev)
+{
+ dw_phy_eq_settings(dw_dev, 0, 0, 0);
+}
+
+static void dw_phy_eq_single(struct dw_phy_dev *dw_dev)
+{
+ u16 val;
+
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_LOOP_CTR_LIMIT(1) |
+ DW_PHY_CH0_MSTR_CTR_LIMIT(1) |
+ DW_PHY_CH0_ADAP_COMP_LIMIT(1)), DW_PHY_CH0_EQ_CTRL1);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH1_LOOP_CTR_LIMIT(1) |
+ DW_PHY_CH1_MSTR_CTR_LIMIT(1) |
+ DW_PHY_CH1_ADAP_COMP_LIMIT(1)), DW_PHY_CH1_EQ_CTRL1);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH2_LOOP_CTR_LIMIT(1) |
+ DW_PHY_CH2_MSTR_CTR_LIMIT(1) |
+ DW_PHY_CH2_ADAP_COMP_LIMIT(1)), DW_PHY_CH2_EQ_CTRL1);
+
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH1_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH1_LB_ACTIVE_OVR |
+ (DW_PHY_CH1_EQUALIZATION_CTR_THR(DW_PHY_EQ_AVG_ACQ) &
+ DW_PHY_CH1_EQUALIZATION_CTR_THR_MASK)),
+ DW_PHY_CH1_EQ_CTRL2);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH2_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH2_LB_ACTIVE_OVR |
+ (DW_PHY_CH2_EQUALIZATION_CTR_THR(DW_PHY_EQ_AVG_ACQ) &
+ DW_PHY_CH2_EQUALIZATION_CTR_THR_MASK)),
+ DW_PHY_CH2_EQ_CTRL2);
+
+ val = dw_phy_read(dw_dev, DW_PHY_MAINFSM_OVR2);
+ val &= ~(DW_PHY_EQ_EN_OVR | DW_PHY_EQ_EN_OVR_EN);
+ dw_phy_write(dw_dev, val, DW_PHY_MAINFSM_OVR2);
+}
+
+static void dw_phy_eq_equal_setting(struct dw_phy_dev *dw_dev, u16 lock_vector)
+{
+ dw_phy_write(dw_dev, lock_vector, DW_PHY_CH0_EQ_CTRL4);
+
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH0_LB_ACTIVE_OVR |
+ (DW_PHY_CH0_EQUALIZATION_CTR_THR(DW_PHY_EQ_AVG_ACQ) &
+ DW_PHY_CH0_EQUALIZATION_CTR_THR_MASK) |
+ DW_PHY_CH0_CH_EQ_SAME_OVRD), DW_PHY_CH0_EQ_CTRL2);
+ dw_phy_write(dw_dev,
+ (DW_PHY_CH0_OVRD_LOCK |
+ DW_PHY_CH0_OVRD_LOCK_VECTOR_EN |
+ DW_PHY_CH0_LB_ACTIVE_OVR |
+ (DW_PHY_CH0_EQUALIZATION_CTR_THR(DW_PHY_EQ_AVG_ACQ) &
+ DW_PHY_CH0_EQUALIZATION_CTR_THR_MASK) |
+ DW_PHY_CH0_CH_EQ_SAME_OVRD), DW_PHY_CH0_EQ_CTRL2);
+}
+
+static void dw_phy_eq_init_vars(struct dw_phy_eq_ch *ch)
+{
+ ch->acc = 0;
+ ch->acq = 0;
+ ch->last_acq = 0;
+ ch->valid_long_setting = 0;
+ ch->valid_short_setting = 0;
+ ch->best_setting = DW_PHY_EQ_SHORT_CABLE_SETTING;
+}
+
+static bool dw_phy_eq_acquire_early_cnt(struct dw_phy_dev *dw_dev,
+ u16 setting, u16 acq,
+ struct dw_phy_eq_ch *ch0,
+ struct dw_phy_eq_ch *ch1,
+ struct dw_phy_eq_ch *ch2)
+{
+ u16 lock_vector = 0x1 << setting;
+
+ ch0->acq = 0;
+ ch1->acq = 0;
+ ch2->acq = 0;
+
+ dw_phy_eq_equal_setting(dw_dev, lock_vector);
+ dw_phy_eq_auto_calib(dw_dev);
+
+ mdelay(DW_PHY_EQ_SLEEP_TIME_CDR);
+ if (!dw_phy_tmds_valid(dw_dev))
+ dev_dbg(dw_dev->dev, "TMDS is NOT valid\n");
+
+ ch0->acq = dw_phy_read(dw_dev, DW_PHY_CH0_EQ_STATUS3) >>
+ DW_PHY_EQ_AVG_ACQ;
+ ch1->acq = dw_phy_read(dw_dev, DW_PHY_CH1_EQ_STATUS3) >>
+ DW_PHY_EQ_AVG_ACQ;
+ ch2->acq = dw_phy_read(dw_dev, DW_PHY_CH2_EQ_STATUS3) >>
+ DW_PHY_EQ_AVG_ACQ;
+
+ dev_dbg(dw_dev->dev,
+ "%s -> phy_read(dw_dev, DW_PHY_CH0_EQ_STATUS3) [%d] [%u]\n",
+ __func__, setting, ch0->acq);
+ dev_dbg(dw_dev->dev,
+ "%s -> phy_read(dw_dev, DW_PHY_CH1_EQ_STATUS3) [%d] [%u]\n",
+ __func__, setting, ch1->acq);
+ dev_dbg(dw_dev->dev,
+ "%s -> phy_read(dw_dev, DW_PHY_CH2_EQ_STATUS3) [%d] [%u]\n",
+ __func__, setting, ch2->acq);
+
+ return true;
+}
+
+static int dw_phy_eq_test_type(u16 setting, bool tmds_valid,
+ u16 eq_cnt_threshold, struct dw_phy_eq_ch *ch)
+{
+ u16 step_slope = 0;
+
+ if (ch->acq < ch->last_acq && tmds_valid) {
+ /* Long cable equalization */
+ ch->acc += ch->last_acq - ch->acq;
+ if (!ch->valid_long_setting &&
+ ch->acq < eq_cnt_threshold &&
+ ch->acc > DW_PHY_EQ_ACC_MIN_LIMIT) {
+ ch->best_long_setting = setting;
+ ch->valid_long_setting = 1;
+ }
+ step_slope = ch->last_acq - ch->acq;
+ }
+
+ if (tmds_valid && !ch->valid_short_setting) {
+ /* Short cable equalization */
+ if (setting < DW_PHY_EQ_SHORT_CABLE_SETTING &&
+ ch->acq < eq_cnt_threshold) {
+ ch->best_short_setting = setting;
+ ch->valid_short_setting = 1;
+ }
+
+ if (setting == DW_PHY_EQ_SHORT_CABLE_SETTING) {
+ ch->best_short_setting = DW_PHY_EQ_SHORT_CABLE_SETTING;
+ ch->valid_short_setting = 1;
+ }
+ }
+
+ if (ch->valid_long_setting && ch->acc > DW_PHY_EQ_ACC_LIMIT) {
+ ch->best_setting = ch->best_long_setting;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_LONG;
+ }
+
+ if (setting == DW_PHY_EQ_MAX_SETTING && ch->acc < DW_PHY_EQ_ACC_LIMIT &&
+ ch->valid_short_setting) {
+ ch->best_setting = ch->best_short_setting;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_SHORT;
+ }
+
+ if (setting == DW_PHY_EQ_MAX_SETTING && tmds_valid &&
+ ch->acc > DW_PHY_EQ_ACC_LIMIT &&
+ step_slope > DW_PHY_EQ_MIN_SLOPE) {
+ ch->best_setting = DW_PHY_EQ_MAX_SETTING;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_MAX;
+ }
+
+ if (setting == DW_PHY_EQ_MAX_SETTING) {
+ ch->best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ return DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR;
+ }
+
+ return 0;
+}
+
+static bool dw_phy_eq_setting_finder(struct dw_phy_dev *dw_dev, u16 acq,
+ u16 eq_cnt_threshold,
+ struct dw_phy_eq_ch *ch0,
+ struct dw_phy_eq_ch *ch1,
+ struct dw_phy_eq_ch *ch2)
+{
+ int ret_ch0 = 0, ret_ch1 = 0, ret_ch2 = 0;
+ bool tmds_valid = false;
+ u16 act = 0;
+
+ dw_phy_eq_init_vars(ch0);
+ dw_phy_eq_init_vars(ch1);
+ dw_phy_eq_init_vars(ch2);
+
+ tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
+ ch0, ch1, ch2);
+
+ while (!ret_ch0 || !ret_ch1 || !ret_ch2) {
+ act++;
+
+ ch0->last_acq = ch0->acq;
+ ch1->last_acq = ch1->acq;
+ ch2->last_acq = ch2->acq;
+
+ tmds_valid = dw_phy_eq_acquire_early_cnt(dw_dev, act, acq,
+ ch0, ch1, ch2);
+
+ if (!ret_ch0)
+ ret_ch0 = dw_phy_eq_test_type(act, tmds_valid,
+ eq_cnt_threshold, ch0);
+ if (!ret_ch1)
+ ret_ch1 = dw_phy_eq_test_type(act, tmds_valid,
+ eq_cnt_threshold, ch1);
+ if (!ret_ch2)
+ ret_ch2 = dw_phy_eq_test_type(act, tmds_valid,
+ eq_cnt_threshold, ch2);
+ }
+
+ if (ret_ch0 == DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR ||
+ ret_ch1 == DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR ||
+ ret_ch2 == DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR)
+ return false;
+ return true;
+}
+
+static bool dw_phy_eq_maxvsmin(u16 ch0_setting, u16 ch1_setting,
+ u16 ch2_setting, u16 min_max_length)
+{
+ u16 min = ch0_setting, max = ch0_setting;
+
+ if (ch1_setting > max)
+ max = ch1_setting;
+ if (ch2_setting > max)
+ max = ch2_setting;
+ if (ch1_setting < min)
+ min = ch1_setting;
+ if (ch2_setting < min)
+ min = ch2_setting;
+
+ if ((max - min) > min_max_length)
+ return false;
+ return true;
+}
+
+static int dw_phy_eq_init(struct dw_phy_dev *dw_dev, u16 acq, bool force)
+{
+ u16 fat_bit_mask, eq_cnt_threshold;
+ struct dw_phy_eq_ch ch0, ch1, ch2;
+ int min_max_length, ret = 0;
+ u16 cdr_phug_frug;
+ u16 mpll_status;
+ unsigned int i;
+
+ if (!dw_dev->phy_enabled)
+ return -EINVAL;
+
+ mpll_status = dw_phy_read(dw_dev, DW_PHY_CLK_MPLL_STATUS);
+ if (mpll_status == dw_dev->mpll_status && !force)
+ return ret;
+
+ dw_dev->mpll_status = mpll_status;
+
+ ret = dw_phy_eq_test(dw_dev, &fat_bit_mask, &min_max_length,
+ &eq_cnt_threshold, &cdr_phug_frug);
+ if (ret) {
+ if (ret == -EINVAL) /* Means equalizer is not needed */
+ ret = 0;
+
+ /* Do not change values if we don't have clock */
+ if (ret != -ETIMEDOUT) {
+ dw_phy_eq_default(dw_dev);
+ dw_phy_pddq(dw_dev, 1);
+ dw_phy_pddq(dw_dev, 0);
+ }
+ } else {
+ dw_phy_eq_single(dw_dev);
+ dw_phy_write(dw_dev, fat_bit_mask, DW_PHY_CH0_EQ_CTRL6);
+ dw_phy_write(dw_dev, fat_bit_mask, DW_PHY_CH1_EQ_CTRL6);
+ dw_phy_write(dw_dev, fat_bit_mask, DW_PHY_CH2_EQ_CTRL6);
+ /* config cdr */
+ dw_phy_write(dw_dev, cdr_phug_frug, DW_PHY_CH0_CDR_CTRL);
+ dw_phy_write(dw_dev, cdr_phug_frug, DW_PHY_CH1_CDR_CTRL);
+ dw_phy_write(dw_dev, cdr_phug_frug, DW_PHY_CH2_CDR_CTRL);
+
+ for (i = 0; i < DW_PHY_EQ_MINMAX_NTRIES; i++) {
+ if (dw_phy_eq_setting_finder(dw_dev, acq,
+ eq_cnt_threshold,
+ &ch0, &ch1, &ch2)) {
+ if (dw_phy_eq_maxvsmin(ch0.best_setting,
+ ch1.best_setting,
+ ch2.best_setting,
+ min_max_length))
+ break;
+ }
+
+ ch0.best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ ch1.best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ ch2.best_setting = DW_PHY_EQ_ERROR_CABLE_SETTING;
+ }
+
+ dev_dbg(dw_dev->dev, "equalizer settings: ch0=0x%x, ch1=0x%x, ch1=0x%x\n",
+ ch0.best_setting, ch1.best_setting,
+ ch2.best_setting);
+
+ if (i == DW_PHY_EQ_MINMAX_NTRIES)
+ ret = -EINVAL;
+
+ /* restore cdr to default settings */
+ dw_phy_write(dw_dev, DW_PHY_EQ_CDR_PHUG_FRUG_DEF,
+ DW_PHY_CH0_CDR_CTRL);
+ dw_phy_write(dw_dev, DW_PHY_EQ_CDR_PHUG_FRUG_DEF,
+ DW_PHY_CH1_CDR_CTRL);
+ dw_phy_write(dw_dev, DW_PHY_EQ_CDR_PHUG_FRUG_DEF,
+ DW_PHY_CH2_CDR_CTRL);
+
+ dw_phy_eq_settings(dw_dev, ch0.best_setting, ch1.best_setting,
+ ch2.best_setting);
+
+ dw_phy_pddq(dw_dev, 1);
+ dw_phy_pddq(dw_dev, 0);
+ }
+
+ return ret;
+}
+
+/* PHY e406 data */
+const struct dw_hdmi_phy_data dw_phy_e406_data = {
+ .name = "e406",
+ .version = 406,
+ .mpll_cfg = dw_phy_e406_mpll_cfg,
+ .dw_phy_eq_init = dw_phy_eq_init,
+};
diff --git a/drivers/phy/dwc/phy-dw-hdmi-e40x-core.c b/drivers/phy/dwc/phy-dw-hdmi-e40x-core.c
new file mode 100644
index 0000000..804afac
--- /dev/null
+++ b/drivers/phy/dwc/phy-dw-hdmi-e40x-core.c
@@ -0,0 +1,514 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2018 - present Synopsys, Inc. and/or its affiliates.
+ * Synopsys DesignWare HDMI PHYs e405 and e406 driver
+ *
+ * Author: Jose Abreu <jose.abreu@xxxxxxxxxxxx>
+ * Author: Nelson Costa <nelson.costa@xxxxxxxxxxxx>
+ */
+
+#include <linux/clk.h>
+#include <linux/delay.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/types.h>
+#include <linux/phy/phy.h>
+#include <linux/phy/dwc/dw-hdmi-phy-pdata.h>
+
+#include "phy-dw-hdmi-e40x.h"
+
+void dw_phy_write(struct dw_phy_dev *dw_dev, u16 val, u16 addr)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ funcs->write(arg, val, addr);
+}
+
+u16 dw_phy_read(struct dw_phy_dev *dw_dev, u16 addr)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ return funcs->read(arg, addr);
+}
+
+static void dw_phy_reset(struct dw_phy_dev *dw_dev, int enable)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ funcs->reset(arg, enable);
+}
+
+void dw_phy_pddq(struct dw_phy_dev *dw_dev, int enable)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ funcs->pddq(arg, enable);
+}
+
+static void dw_phy_svsmode(struct dw_phy_dev *dw_dev, int enable)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ funcs->svsmode(arg, enable);
+}
+
+static void dw_phy_zcal_reset(struct dw_phy_dev *dw_dev)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ funcs->zcal_reset(arg);
+}
+
+static bool dw_phy_zcal_done(struct dw_phy_dev *dw_dev)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ return funcs->zcal_done(arg);
+}
+
+bool dw_phy_tmds_valid(struct dw_phy_dev *dw_dev)
+{
+ const struct dw_phy_funcs *funcs = dw_dev->config->funcs;
+ void *arg = dw_dev->config->funcs_arg;
+
+ return funcs->tmds_valid(arg);
+}
+
+static int dw_phy_color_depth_to_mode(u8 color_depth)
+{
+ int sc_clrdep = 0;
+
+ switch (color_depth) {
+ case 24:
+ sc_clrdep = DW_PHY_CLRDEP_8BIT_MODE;
+ break;
+ case 30:
+ sc_clrdep = DW_PHY_CLRDEP_10BIT_MODE;
+ break;
+ case 36:
+ sc_clrdep = DW_PHY_CLRDEP_12BIT_MODE;
+ break;
+ case 48:
+ sc_clrdep = DW_PHY_CLRDEP_16BIT_MODE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return sc_clrdep;
+}
+
+static int dw_phy_config(struct dw_phy_dev *dw_dev, u8 color_depth,
+ bool hdmi2, bool scrambling)
+{
+ const struct dw_phy_mpll_config *mpll_cfg = dw_dev->phy_data->mpll_cfg;
+ struct dw_phy_pdata *phy = dw_dev->config;
+ struct device *dev = dw_dev->dev;
+ u16 val, sc_clrdep;
+ int timeout = 100;
+ bool zcal_done;
+ int ret;
+
+ dev_dbg(dev, "%s: color_depth=%d, hdmi2=%d, scrambling=%d, cfg_clk=%d\n",
+ __func__, color_depth, hdmi2, scrambling, phy->cfg_clk);
+
+ ret = dw_phy_color_depth_to_mode(color_depth);
+ if (ret < 0)
+ return ret;
+
+ sc_clrdep = ret;
+
+ dw_phy_reset(dw_dev, 1);
+ dw_phy_pddq(dw_dev, 1);
+ dw_phy_svsmode(dw_dev, 1);
+
+#if IS_ENABLED(CONFIG_VIDEO_DWC_HDMI_PHY_E40X_SUPPORT_TESTCHIP)
+ dw_phy_zcal_reset(dw_dev);
+ do {
+ usleep_range(1000, 1100);
+ zcal_done = dw_phy_zcal_done(dw_dev);
+ } while (!zcal_done && timeout--);
+
+ if (!zcal_done) {
+ dev_err(dw_dev->dev, "Zcal calibration failed\n");
+ return -ETIMEDOUT;
+ }
+#endif /* CONFIG_VIDEO_DWC_HDMI_PHY_E40X_SUPPORT_TESTCHIP */
+
+ dw_phy_reset(dw_dev, 0);
+
+ /* CMU */
+ val = DW_PHY_LOCK_THRES(0x08) & DW_PHY_LOCK_THRES_MASK;
+ val |= DW_PHY_TIMEBASE_OVR_EN;
+ val |= DW_PHY_TIMEBASE_OVR(phy->cfg_clk * 4) & DW_PHY_TIMEBASE_OVR_MASK;
+ dw_phy_write(dw_dev, val, DW_PHY_CMU_CONFIG);
+
+ /* Color Depth and enable fast switching */
+ val = dw_phy_read(dw_dev, DW_PHY_SYSTEM_CONFIG);
+ val &= ~DW_PHY_CLRDEP_MASK;
+ val |= sc_clrdep | DW_PHY_FAST_SWITCHING;
+ dw_phy_write(dw_dev, val, DW_PHY_SYSTEM_CONFIG);
+
+ /* MPLL */
+ for (; mpll_cfg->addr != 0x0; mpll_cfg++)
+ dw_phy_write(dw_dev, mpll_cfg->val, mpll_cfg->addr);
+
+ /* Operation for data rates between 3.4Gbps and 6Gbps */
+ val = dw_phy_read(dw_dev, DW_PHY_CDR_CTRL_CNT);
+ val &= ~DW_PHY_HDMI_MHL_MODE_MASK;
+ if (hdmi2)
+ val |= DW_PHY_HDMI_MHL_MODE_ABOVE_3_4G_BITPS;
+ else
+ val |= DW_PHY_HDMI_MHL_MODE_BELOW_3_4G_BITPS;
+ dw_phy_write(dw_dev, val, DW_PHY_CDR_CTRL_CNT);
+
+ /* Scrambling */
+ val = dw_phy_read(dw_dev, DW_PHY_OVL_PROT_CTRL);
+ if (scrambling)
+ val |= DW_PHY_SCRAMBLING_EN_OVR |
+ DW_PHY_SCRAMBLING_EN_OVR_EN;
+ else
+ val &= ~(DW_PHY_SCRAMBLING_EN_OVR |
+ DW_PHY_SCRAMBLING_EN_OVR_EN);
+ dw_phy_write(dw_dev, val, DW_PHY_OVL_PROT_CTRL);
+
+ /* Enable PHY */
+ dw_phy_pddq(dw_dev, 0);
+
+ dw_dev->color_depth = color_depth;
+ dw_dev->hdmi2 = hdmi2;
+ dw_dev->scrambling = scrambling;
+ return 0;
+}
+
+static int dw_phy_enable(struct dw_phy_dev *dw_dev, unsigned char color_depth,
+ bool hdmi2, bool scrambling)
+{
+ int ret;
+
+ ret = dw_phy_config(dw_dev, color_depth, hdmi2, scrambling);
+ if (ret)
+ return ret;
+
+ dw_phy_reset(dw_dev, 0);
+ dw_phy_pddq(dw_dev, 0);
+ dw_dev->phy_enabled = true;
+ return 0;
+}
+
+static void dw_phy_disable(struct dw_phy_dev *dw_dev)
+{
+ if (!dw_dev->phy_enabled)
+ return;
+
+ dw_phy_reset(dw_dev, 1);
+ dw_phy_pddq(dw_dev, 1);
+ dw_phy_svsmode(dw_dev, 0);
+ dw_dev->mpll_status = 0xFFFF;
+ dw_dev->phy_enabled = false;
+}
+
+static int dw_phy_set_color_depth(struct dw_phy_dev *dw_dev,
+ u8 color_depth)
+{
+ u16 val, sc_clrdep;
+ int ret;
+
+ if (!dw_dev->phy_enabled)
+ return -EINVAL;
+
+ ret = dw_phy_color_depth_to_mode(color_depth);
+ if (ret < 0)
+ return ret;
+
+ sc_clrdep = ret;
+
+ /* Color Depth */
+ val = dw_phy_read(dw_dev, DW_PHY_SYSTEM_CONFIG);
+ val &= ~DW_PHY_CLRDEP_MASK;
+ val |= sc_clrdep;
+ dw_phy_write(dw_dev, val, DW_PHY_SYSTEM_CONFIG);
+
+ dev_dbg(dw_dev->dev, "%s: color_depth=%d\n", __func__, color_depth);
+
+ return 0;
+}
+
+static bool dw_phy_has_dt(struct dw_phy_dev *dw_dev)
+{
+ return of_device_get_match_data(dw_dev->dev);
+}
+
+static int dw_phy_parse_dt(struct dw_phy_dev *dw_dev)
+{
+ const struct dw_hdmi_phy_data *of_data;
+ int ret;
+
+ of_data = of_device_get_match_data(dw_dev->dev);
+ if (!of_data) {
+ dev_err(dw_dev->dev, "no valid PHY configuration available\n");
+ return -EINVAL;
+ }
+
+ /* load PHY version */
+ dw_dev->config->version = of_data->version;
+
+ /* load PHY clock */
+ dw_dev->clk = devm_clk_get(dw_dev->dev, "cfg");
+ if (IS_ERR(dw_dev->clk)) {
+ dev_err(dw_dev->dev, "failed to get cfg clock\n");
+ return PTR_ERR(dw_dev->clk);
+ }
+
+ ret = clk_prepare_enable(dw_dev->clk);
+ if (ret) {
+ dev_err(dw_dev->dev, "failed to enable cfg clock\n");
+ return ret;
+ }
+
+ dw_dev->config->cfg_clk = clk_get_rate(dw_dev->clk) / 1000000U;
+ if (!dw_dev->config->cfg_clk) {
+ dev_err(dw_dev->dev, "invalid cfg clock frequency\n");
+ ret = -EINVAL;
+ goto err_clk;
+ }
+
+ return 0;
+
+err_clk:
+ clk_disable_unprepare(dw_dev->clk);
+ return ret;
+}
+
+static int dw_phy_parse_pd(struct dw_phy_dev *dw_dev)
+{
+ /* validate if the platform data was properly supplied */
+
+ if (!dw_dev->config->version) {
+ dev_err(dw_dev->dev,
+ "invalid version platform data supplied\n");
+ return -EINVAL;
+ }
+
+ if (!dw_dev->config->cfg_clk) {
+ dev_err(dw_dev->dev, "invalid clock platform data supplied\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int dw_phy_set_data(struct dw_phy_dev *dw_dev)
+{
+ const struct dw_hdmi_phy_data *of_data;
+
+ of_data = of_device_get_match_data(dw_dev->dev);
+
+ if (of_data) {
+ dw_dev->phy_data = (struct dw_hdmi_phy_data *)of_data;
+ } else if (dw_dev->config->version == dw_phy_e405_data.version) {
+ dw_dev->phy_data = &dw_phy_e405_data;
+ } else if (dw_dev->config->version == dw_phy_e406_data.version) {
+ dw_dev->phy_data = &dw_phy_e406_data;
+ } else {
+ dev_err(dw_dev->dev, "failed setting PHY data\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const char *dw_phy_lookup_dev_id(struct dw_phy_dev *dw_dev)
+{
+ const char *dev_id = "dw-hdmi-rx";
+
+ /* The lookup dev_id name by default is "dw-hdmi-rx",
+ * however if there is a parent device associated then
+ * the dev_id will be overridden by that dev_name of parent.
+ * This allows other drivers to re-use the same API PHY.
+ */
+ if (dw_dev->dev->parent)
+ dev_id = dev_name(dw_dev->dev->parent);
+
+ return dev_id;
+}
+
+static int dw_hdmi_phy_calibrate(struct phy *phy)
+{
+ struct dw_phy_dev *dw_dev = phy_get_drvdata(phy);
+ const struct phy_configure_opts_hdmi *hdmi_opts = &dw_dev->hdmi_opts;
+
+ /* call the equalization function for calibration */
+ return dw_dev->phy_data->dw_phy_eq_init(dw_dev,
+ hdmi_opts->calibration_acq,
+ hdmi_opts->calibration_force);
+}
+
+static int dw_hdmi_phy_power_on(struct phy *phy)
+{
+ struct dw_phy_dev *dw_dev = phy_get_drvdata(phy);
+
+ return dw_phy_enable(dw_dev, dw_dev->hdmi_opts.color_depth,
+ dw_dev->hdmi_opts.tmds_bit_clock_ratio,
+ dw_dev->hdmi_opts.scrambling);
+}
+
+static int dw_hdmi_phy_power_off(struct phy *phy)
+{
+ struct dw_phy_dev *dw_dev = phy_get_drvdata(phy);
+
+ dw_phy_disable(dw_dev);
+
+ return 0;
+}
+
+static int dw_hdmi_phy_configure(struct phy *phy,
+ union phy_configure_opts *opts)
+{
+ const struct phy_configure_opts_hdmi *hdmi_opts = &opts->hdmi;
+ struct dw_phy_dev *dw_dev = phy_get_drvdata(phy);
+ int ret = 0;
+
+ /* save the configuration options */
+ memcpy(&dw_dev->hdmi_opts, hdmi_opts, sizeof(*hdmi_opts));
+
+ /* check if it is needed to reconfigure deep_color */
+ if (dw_dev->hdmi_opts.set_color_depth) {
+ if (dw_dev->phy_enabled) {
+ ret = dw_phy_set_color_depth(dw_dev,
+ hdmi_opts->color_depth);
+ if (!ret)
+ dw_dev->hdmi_opts.set_color_depth = 0;
+ }
+ }
+
+ return ret;
+}
+
+static const struct phy_ops dw_hdmi_phy_ops = {
+ .configure = dw_hdmi_phy_configure,
+ .power_on = dw_hdmi_phy_power_on,
+ .calibrate = dw_hdmi_phy_calibrate,
+ .power_off = dw_hdmi_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static int dw_phy_probe(struct platform_device *pdev)
+{
+ struct dw_phy_pdata *pdata = pdev->dev.platform_data;
+ struct device *dev = &pdev->dev;
+ struct device_node *node = dev->of_node;
+ struct dw_phy_dev *dw_dev;
+ int ret;
+
+ dev_dbg(dev, "probe start\n");
+
+ dw_dev = devm_kzalloc(dev, sizeof(*dw_dev), GFP_KERNEL);
+ if (!dw_dev)
+ return -ENOMEM;
+
+ if (!pdata) {
+ dev_err(dev, "no platform data supplied\n");
+ return -EINVAL;
+ }
+
+ dw_dev->dev = dev;
+ dw_dev->config = pdata;
+
+ /* parse configuration */
+ if (dw_phy_has_dt(dw_dev)) {
+ /* configuration based on device tree */
+ ret = dw_phy_parse_dt(dw_dev);
+ } else {
+ /* configuration based on platform device */
+ ret = dw_phy_parse_pd(dw_dev);
+ }
+ if (ret)
+ goto err;
+
+ /* set phy_data depending on the PHY type */
+ ret = dw_phy_set_data(dw_dev);
+ if (ret)
+ goto err;
+
+ /* Force PHY disabling */
+ dw_dev->phy_enabled = true;
+ dw_phy_disable(dw_dev);
+
+ /* creates the PHY reference */
+ dw_dev->phy = devm_phy_create(dw_dev->dev, node, &dw_hdmi_phy_ops);
+ if (IS_ERR(dw_dev->phy)) {
+ dev_err(dw_dev->dev, "Failed to create HDMI PHY reference\n");
+ return PTR_ERR(dw_dev->phy);
+ }
+
+ platform_set_drvdata(pdev, dw_dev);
+ phy_set_drvdata(dw_dev->phy, dw_dev);
+
+ /* create the lookup association for non-dt systems */
+ if (!node) {
+ ret = phy_create_lookup(dw_dev->phy, "hdmi-phy",
+ dw_phy_lookup_dev_id(dw_dev));
+ if (ret) {
+ dev_err(dev, "Failed to create HDMI PHY lookup\n");
+ goto err;
+ }
+ dev_dbg(dev,
+ "phy_create_lookup: con_id='%s' <-> dev_id='%s')\n",
+ "hdmi-phy", dw_phy_lookup_dev_id(dw_dev));
+ }
+
+ dev_dbg(dev, "driver probed (name=e%d, cfg clock=%d, dev_name=%s)\n",
+ dw_dev->config->version, dw_dev->config->cfg_clk,
+ dev_name(dw_dev->dev));
+ return 0;
+
+err:
+ if (dw_dev->clk)
+ clk_disable_unprepare(dw_dev->clk);
+
+ return ret;
+}
+
+static int dw_phy_remove(struct platform_device *pdev)
+{
+ struct dw_phy_dev *dw_dev = platform_get_drvdata(pdev);
+
+ phy_remove_lookup(dw_dev->phy, "hdmi-phy",
+ dw_phy_lookup_dev_id(dw_dev));
+
+ if (dw_dev->clk)
+ clk_disable_unprepare(dw_dev->clk);
+
+ return 0;
+}
+
+static const struct of_device_id dw_hdmi_phy_e40x_id[] = {
+ { .compatible = "snps,dw-hdmi-phy-e405", .data = &dw_phy_e405_data, },
+ { .compatible = "snps,dw-hdmi-phy-e406", .data = &dw_phy_e406_data, },
+ { },
+};
+MODULE_DEVICE_TABLE(of, dw_hdmi_phy_e40x_id);
+
+static struct platform_driver dw_phy_e40x_driver = {
+ .probe = dw_phy_probe,
+ .remove = dw_phy_remove,
+ .driver = {
+ .name = DW_PHY_E40X_DRVNAME,
+ .of_match_table = dw_hdmi_phy_e40x_id,
+ }
+};
+module_platform_driver(dw_phy_e40x_driver);
+
+MODULE_AUTHOR("Jose Abreu <jose.abreu@xxxxxxxxxxxx>");
+MODULE_AUTHOR("Nelson Costa <nelson.costa@xxxxxxxxxxxx>");
+MODULE_DESCRIPTION("DesignWare HDMI PHYs e405 and e406 driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/phy/dwc/phy-dw-hdmi-e40x.h b/drivers/phy/dwc/phy-dw-hdmi-e40x.h
new file mode 100644
index 0000000..03b5c60
--- /dev/null
+++ b/drivers/phy/dwc/phy-dw-hdmi-e40x.h
@@ -0,0 +1,219 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 - present Synopsys, Inc. and/or its affiliates.
+ * Synopsys DesignWare HDMI PHYs e405 and e406 driver
+ *
+ * Author: Jose Abreu <jose.abreu@xxxxxxxxxxxx>
+ * Author: Nelson Costa <nelson.costa@xxxxxxxxxxxx>
+ */
+
+#ifndef __DW_HDMI_PHY_E40X_H__
+#define __DW_HDMI_PHY_E40X_H__
+
+#include <linux/phy/phy.h>
+
+/* PHYs e405 and e406 Registers */
+
+/* Clock Measurement Unit Configuration Register */
+#define DW_PHY_CMU_CONFIG 0x02
+#define DW_PHY_TIMEBASE_OVR(v) (v)
+#define DW_PHY_TIMEBASE_OVR_MASK GENMASK(8, 0)
+#define DW_PHY_TIMEBASE_OVR_EN BIT(9)
+#define DW_PHY_LOCK_THRES(v) ((v) << 10)
+#define DW_PHY_LOCK_THRES_MASK GENMASK(15, 10)
+
+/* System Configuration Register */
+#define DW_PHY_SYSTEM_CONFIG 0x03
+#define DW_PHY_CLRDEP_8BIT_MODE (0 << 5)
+#define DW_PHY_CLRDEP_10BIT_MODE BIT(5)
+#define DW_PHY_CLRDEP_12BIT_MODE (2 << 5)
+#define DW_PHY_CLRDEP_16BIT_MODE (3 << 5)
+#define DW_PHY_CLRDEP_MASK GENMASK(6, 5)
+#define DW_PHY_FAST_SWITCHING BIT(11)
+
+/* Main FSM Control Register */
+#define DW_PHY_MAINFSM_CTRL 0x05
+#define DW_PHY_MAIN_FSM_STATE(v) (v)
+#define DW_PHY_MAIN_FSM_STATE_MASK GENMASK(3, 0)
+#define DW_PHY_FORCE_STATE_EN BIT(4)
+#define DW_PHY_FORCE_STATE_DIS (0 << 4)
+#define DW_PHY_FORCE_STATE_MASK BIT(4)
+#define DW_PHY_EQCAL_DIS_CTRL_QUARTER_RATE (BIT(2) << 9)
+#define DW_PHY_EQCAL_DIS_CTRL_ONE_EIGHT_RATE (BIT(3) << 9)
+#define DW_PHY_EQCAL_DIS_CTRL_MASK GENMASK(12, 9)
+
+/* Main FSM Override 2 Register */
+#define DW_PHY_MAINFSM_OVR2 0x08
+#define DW_PHY_EQ_EN_OVR BIT(5)
+#define DW_PHY_EQ_EN_OVR_EN BIT(6)
+
+/* Main FSM Status 1 Register */
+#define DW_PHY_MAINFSM_STATUS1 0x09
+#define DW_PHY_CLOCK_STABLE BIT(8)
+#define DW_PHY_PLL_RATE_BIT0 BIT(9)
+#define DW_PHY_PLL_RATE_BIT1 (2 << 9)
+#define DW_PHY_PLL_RATE_MASK GENMASK(10, 9)
+
+/* Overload Protection Control Register */
+#define DW_PHY_OVL_PROT_CTRL 0x0D
+#define DW_PHY_SCRAMBLING_EN_OVR BIT(6)
+#define DW_PHY_SCRAMBLING_EN_OVR_EN BIT(7)
+
+/* CDR Control Register */
+#define DW_PHY_CDR_CTRL_CNT 0x0E
+#define DW_PHY_HDMI_MHL_MODE_BELOW_3_4G_BITPS (0 << 8)
+#define DW_PHY_HDMI_MHL_MODE_ABOVE_3_4G_BITPS BIT(8)
+#define DW_PHY_HDMI_MHL_MODE_MASK GENMASK(9, 8)
+
+#define DW_PHY_CLK_MPLL_STATUS 0x2F
+#define DW_PHY_CH0_CDR_CTRL 0x31
+
+/* Channel 0 Equalizer Control 1 Register*/
+#define DW_PHY_CH0_EQ_CTRL1 0x32
+#define DW_PHY_CH0_LOOP_CTR_LIMIT(v) (v)
+#define DW_PHY_CH0_LOOP_CTR_LIMIT_MASK GENMASK(3, 0)
+#define DW_PHY_CH0_MSTR_CTR_LIMIT(v) ((v) << 4)
+#define DW_PHY_CH0_MSTR_CTR_LIMIT_MASK GENMASK(8, 4)
+#define DW_PHY_CH0_ADAP_COMP_LIMIT(v) ((v) << 9)
+#define DW_PHY_CH0_ADAP_COMP_LIMIT_MASK GENMASK(12, 9)
+
+/* Channel 0 Equalizer Control 2 Register */
+#define DW_PHY_CH0_EQ_CTRL2 0x33
+#define DW_PHY_CH0_OVRD_LOCK BIT(1)
+#define DW_PHY_CH0_OVRD_LOCK_VECTOR_EN BIT(2)
+#define DW_PHY_CH0_LB_ACTIVE_OVR BIT(5)
+#define DW_PHY_CH0_EQUALIZATION_CTR_THR(v) ((v) << 11)
+#define DW_PHY_CH0_EQUALIZATION_CTR_THR_MASK GENMASK(13, 11)
+#define DW_PHY_CH0_CH_EQ_SAME_OVRD BIT(14)
+
+#define DW_PHY_CH0_EQ_STATUS 0x34
+
+/* Channel 0 Equalizer Control 3 Register */
+#define DW_PHY_CH0_EQ_CTRL3 0x3E
+#define DW_PHY_CH0_EXT_EQ_SET_MASK GENMASK(3, 0)
+
+#define DW_PHY_CH0_EQ_CTRL4 0x3F
+#define DW_PHY_CH0_EQ_STATUS2 0x40
+#define DW_PHY_CH0_EQ_STATUS3 0x42
+#define DW_PHY_CH0_EQ_CTRL6 0x43
+#define DW_PHY_CH1_CDR_CTRL 0x51
+
+/* Channel 1 Equalizer Control 1 Register */
+#define DW_PHY_CH1_EQ_CTRL1 0x52
+#define DW_PHY_CH1_LOOP_CTR_LIMIT(v) (v)
+#define DW_PHY_CH1_LOOP_CTR_LIMIT_MASK GENMASK(3, 0)
+#define DW_PHY_CH1_MSTR_CTR_LIMIT(v) ((v) << 4)
+#define DW_PHY_CH1_MSTR_CTR_LIMIT_MASK GENMASK(8, 4)
+#define DW_PHY_CH1_ADAP_COMP_LIMIT(v) ((v) << 9)
+#define DW_PHY_CH1_ADAP_COMP_LIMIT_MASK GENMASK(12, 9)
+
+/* Channel 1 Equalizer Control 2 Register */
+#define DW_PHY_CH1_EQ_CTRL2 0x53
+#define DW_PHY_CH1_OVRD_LOCK BIT(1)
+#define DW_PHY_CH1_OVRD_LOCK_VECTOR_EN BIT(2)
+#define DW_PHY_CH1_LB_ACTIVE_OVR BIT(5)
+#define DW_PHY_CH1_EQUALIZATION_CTR_THR(v) ((v) << 11)
+#define DW_PHY_CH1_EQUALIZATION_CTR_THR_MASK GENMASK(13, 11)
+
+#define DW_PHY_CH1_EQ_STATUS 0x54
+
+/* Channel 1 Equalizer Control 3 Register */
+#define DW_PHY_CH1_EQ_CTRL3 0x5E
+#define DW_PHY_CH1_EXT_EQ_SET_MASK GENMASK(3, 0)
+
+#define DW_PHY_CH1_EQ_CTRL4 0x5F
+#define DW_PHY_CH1_EQ_STATUS2 0x60
+#define DW_PHY_CH1_EQ_STATUS3 0x62
+#define DW_PHY_CH1_EQ_CTRL6 0x63
+#define DW_PHY_CH2_CDR_CTRL 0x71
+
+/* Channel 2 Equalizer Control 1 Register */
+#define DW_PHY_CH2_EQ_CTRL1 0x72
+#define DW_PHY_CH2_LOOP_CTR_LIMIT(v) (v)
+#define DW_PHY_CH2_LOOP_CTR_LIMIT_MASK GENMASK(3, 0)
+#define DW_PHY_CH2_MSTR_CTR_LIMIT(v) ((v) << 4)
+#define DW_PHY_CH2_MSTR_CTR_LIMIT_MASK GENMASK(8, 4)
+#define DW_PHY_CH2_ADAP_COMP_LIMIT(v) ((v) << 9)
+#define DW_PHY_CH2_ADAP_COMP_LIMIT_MASK GENMASK(12, 9)
+
+/* Channel 2 Equalizer Control 2 Register */
+#define DW_PHY_CH2_EQ_CTRL2 0x73
+#define DW_PHY_CH2_OVRD_LOCK BIT(1)
+#define DW_PHY_CH2_OVRD_LOCK_VECTOR_EN BIT(2)
+#define DW_PHY_CH2_LB_ACTIVE_OVR BIT(5)
+#define DW_PHY_CH2_EQUALIZATION_CTR_THR(v) ((v) << 11)
+#define DW_PHY_CH2_EQUALIZATION_CTR_THR_MASK GENMASK(13, 11)
+
+#define DW_PHY_CH2_EQ_STATUS 0x74
+
+/* Channel 2 Equalizer Control 3 Register */
+#define DW_PHY_CH2_EQ_CTRL3 0x7E
+#define DW_PHY_CH2_EXT_EQ_SET_MASK GENMASK(3, 0)
+
+#define DW_PHY_CH2_EQ_CTRL4 0x7F
+#define DW_PHY_CH2_EQ_STATUS2 0x80
+#define DW_PHY_CH2_EQ_STATUS3 0x82
+#define DW_PHY_CH2_EQ_CTRL6 0x83
+
+/* PHY equalization test type return codes */
+#define DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_LONG 1
+#define DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_SHORT 2
+#define DW_PHY_EQ_TEST_TYPE_BEST_SET_IS_MAX 3
+#define DW_PHY_EQ_TEST_TYPE_BEST_SET_ERROR 255
+
+/* PHY equalization channel struct */
+struct dw_phy_eq_ch {
+ u16 best_long_setting;
+ u8 valid_long_setting;
+ u16 best_short_setting;
+ u8 valid_short_setting;
+ u16 best_setting;
+ u16 acc;
+ u16 acq;
+ u16 last_acq;
+ u16 upper_bound_acq;
+ u16 lower_bound_acq;
+ u16 out_bound_acq;
+ u16 read_acq;
+};
+
+/* PHY mpll configuration struct */
+struct dw_phy_mpll_config {
+ u16 addr;
+ u16 val;
+};
+
+struct dw_phy_dev;
+
+/* PHY data struct */
+struct dw_hdmi_phy_data {
+ const char *name;
+ unsigned int version;
+ const struct dw_phy_mpll_config *mpll_cfg;
+ int (*dw_phy_eq_init)(struct dw_phy_dev *dw_dev, u16 acq, bool force);
+};
+
+/* PHY device struct */
+struct dw_phy_dev {
+ struct device *dev;
+ struct dw_phy_pdata *config;
+ const struct dw_hdmi_phy_data *phy_data;
+ struct phy *phy;
+ struct phy_configure_opts_hdmi hdmi_opts;
+ struct clk *clk;
+ u8 phy_enabled;
+ u16 mpll_status;
+ u8 color_depth;
+ u8 hdmi2;
+ u8 scrambling;
+};
+
+void dw_phy_write(struct dw_phy_dev *dw_dev, u16 val, u16 addr);
+u16 dw_phy_read(struct dw_phy_dev *dw_dev, u16 addr);
+void dw_phy_pddq(struct dw_phy_dev *dw_dev, int enable);
+bool dw_phy_tmds_valid(struct dw_phy_dev *dw_dev);
+
+extern const struct dw_hdmi_phy_data dw_phy_e405_data;
+extern const struct dw_hdmi_phy_data dw_phy_e406_data;
+
+#endif /* __DW_HDMI_PHY_E40X_H__ */
diff --git a/include/linux/phy/dwc/dw-hdmi-phy-pdata.h b/include/linux/phy/dwc/dw-hdmi-phy-pdata.h
new file mode 100644
index 0000000..19f3b05
--- /dev/null
+++ b/include/linux/phy/dwc/dw-hdmi-phy-pdata.h
@@ -0,0 +1,73 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (c) 2018 - present Synopsys, Inc. and/or its affiliates.
+ * Synopsys DesignWare HDMI PHY platform data
+ *
+ * Author: Jose Abreu <jose.abreu@xxxxxxxxxxxx>
+ * Author: Nelson Costa <nelson.costa@xxxxxxxxxxxx>
+ */
+
+#ifndef __DW_HDMI_PHY_PDATA_H__
+#define __DW_HDMI_PHY_PDATA_H__
+
+#define DW_PHY_E40X_DRVNAME "phy-dw-hdmi-e40x"
+
+/**
+ * struct dw_phy_funcs - Set of callbacks used to communicate between phy
+ * and hdmi controller. Controller must correctly fill these callbacks
+ * before probbing the phy driver.
+ *
+ * @write: write callback. Write value 'val' into address 'addr' of phy.
+ *
+ * @read: read callback. Read address 'addr' and return the value.
+ *
+ * @reset: reset callback. Activate phy reset. Active high.
+ *
+ * @pddq: pddq callback. Activate phy configuration mode. Active high.
+ *
+ * @svsmode: svsmode callback. Activate phy retention mode. Active low.
+ *
+ * @zcal_reset: zcal reset callback. Restart the impedance calibration
+ * procedure. Active high. This is only used in prototyping and not in real
+ * ASIC. Callback shall be empty (but non NULL) in ASIC cases.
+ *
+ * @zcal_done: zcal done callback. Return the current status of impedance
+ * calibration procedure. This is only used in prototyping and not in real
+ * ASIC. Shall return always true in ASIC cases.
+ *
+ * @tmds_valid: TMDS valid callback. Return the current status of TMDS signal
+ * that comes from phy and feeds controller. This is read from a controller
+ * register.
+ */
+struct dw_phy_funcs {
+ void (*write)(void *arg, u16 val, u16 addr);
+ u16 (*read)(void *arg, u16 addr);
+ void (*reset)(void *arg, int enable);
+ void (*pddq)(void *arg, int enable);
+ void (*svsmode)(void *arg, int enable);
+ void (*zcal_reset)(void *arg);
+ bool (*zcal_done)(void *arg);
+ bool (*tmds_valid)(void *arg);
+};
+
+/**
+ * struct dw_phy_pdata - Platform data definition for Synopsys HDMI PHY.
+ *
+ * @version: The version of the phy.
+ *
+ * @cfg_clk: Configuration clock.
+ *
+ * @funcs: set of callbacks that must be correctly filled and supplied to phy.
+ * See @dw_phy_funcs.
+ *
+ * @funcs_arg: parameter that is supplied to callbacks along with the function
+ * parameters.
+ */
+struct dw_phy_pdata {
+ unsigned int version;
+ unsigned int cfg_clk;
+ const struct dw_phy_funcs *funcs;
+ void *funcs_arg;
+};
+
+#endif /* __DW_HDMI_PHY_PDATA_H__ */
--
2.7.4