[PATCH 4/7] drm: imx: mhdp: initial support for i.MX8MQ MHDP Displayport
From: sandor . yu
Date: Mon Jun 01 2020 - 02:23:29 EST
From: Sandor Yu <Sandor.yu@xxxxxxx>
Initial support for i.MX8MQ MHDP Displayport.
Add MHDP DP PHY configutation.
The features are same as MHDP DP bridge driver.
Signed-off-by: Sandor Yu <Sandor.yu@xxxxxxx>
---
drivers/gpu/drm/imx/Kconfig | 1 +
drivers/gpu/drm/imx/Makefile | 1 +
drivers/gpu/drm/imx/mhdp/Kconfig | 8 +
drivers/gpu/drm/imx/mhdp/Makefile | 4 +
drivers/gpu/drm/imx/mhdp/cdns-mhdp-dp-phy.c | 390 ++++++++++++++++++++
drivers/gpu/drm/imx/mhdp/cdns-mhdp-imxdrv.c | 130 +++++++
drivers/gpu/drm/imx/mhdp/cdns-mhdp-phy.h | 146 ++++++++
7 files changed, 680 insertions(+)
create mode 100644 drivers/gpu/drm/imx/mhdp/Kconfig
create mode 100644 drivers/gpu/drm/imx/mhdp/Makefile
create mode 100644 drivers/gpu/drm/imx/mhdp/cdns-mhdp-dp-phy.c
create mode 100644 drivers/gpu/drm/imx/mhdp/cdns-mhdp-imxdrv.c
create mode 100644 drivers/gpu/drm/imx/mhdp/cdns-mhdp-phy.h
diff --git a/drivers/gpu/drm/imx/Kconfig b/drivers/gpu/drm/imx/Kconfig
index 6231048aa5aa..4af2f575f04b 100644
--- a/drivers/gpu/drm/imx/Kconfig
+++ b/drivers/gpu/drm/imx/Kconfig
@@ -41,3 +41,4 @@ config DRM_IMX_HDMI
Choose this if you want to use HDMI on i.MX6.
source "drivers/gpu/drm/imx/dcss/Kconfig"
+source "drivers/gpu/drm/imx/mhdp/Kconfig"
diff --git a/drivers/gpu/drm/imx/Makefile b/drivers/gpu/drm/imx/Makefile
index b644deffe948..0b46c46b19a8 100644
--- a/drivers/gpu/drm/imx/Makefile
+++ b/drivers/gpu/drm/imx/Makefile
@@ -10,3 +10,4 @@ obj-$(CONFIG_DRM_IMX_LDB) += imx-ldb.o
obj-$(CONFIG_DRM_IMX_HDMI) += dw_hdmi-imx.o
obj-$(CONFIG_DRM_IMX_DCSS) += dcss/
+obj-$(CONFIG_DRM_IMX_CDNS_MHDP) += mhdp/
diff --git a/drivers/gpu/drm/imx/mhdp/Kconfig b/drivers/gpu/drm/imx/mhdp/Kconfig
new file mode 100644
index 000000000000..c9e07a3bf3df
--- /dev/null
+++ b/drivers/gpu/drm/imx/mhdp/Kconfig
@@ -0,0 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
+
+config DRM_IMX_CDNS_MHDP
+ tristate "NXP i.MX MX8 DRM DP"
+ select DRM_CDNS_MHDP
+ select DRM_CDNS_DP
+ help
+ Choose this if you want to use Displayport on i.MX8.
diff --git a/drivers/gpu/drm/imx/mhdp/Makefile b/drivers/gpu/drm/imx/mhdp/Makefile
new file mode 100644
index 000000000000..4383e689445a
--- /dev/null
+++ b/drivers/gpu/drm/imx/mhdp/Makefile
@@ -0,0 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0
+
+cdns_mhdp_imx-objs := cdns-mhdp-imxdrv.o cdns-mhdp-dp-phy.o
+obj-$(CONFIG_DRM_IMX_CDNS_MHDP) += cdns_mhdp_imx.o
diff --git a/drivers/gpu/drm/imx/mhdp/cdns-mhdp-dp-phy.c b/drivers/gpu/drm/imx/mhdp/cdns-mhdp-dp-phy.c
new file mode 100644
index 000000000000..bb694301984d
--- /dev/null
+++ b/drivers/gpu/drm/imx/mhdp/cdns-mhdp-dp-phy.c
@@ -0,0 +1,390 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Cadence Display Port Interface (DP) PHY driver
+ *
+ * Copyright (C) 2019-2020 NXP Semiconductor, Inc.
+ */
+#include <linux/clk.h>
+#include <linux/kernel.h>
+#include <drm/drm_dp_helper.h>
+#include <drm/bridge/cdns-mhdp.h>
+#include "cdns-mhdp-phy.h"
+
+enum dp_link_rate {
+ RATE_1_6 = 162000,
+ RATE_2_1 = 216000,
+ RATE_2_4 = 243000,
+ RATE_2_7 = 270000,
+ RATE_3_2 = 324000,
+ RATE_4_3 = 432000,
+ RATE_5_4 = 540000,
+ RATE_8_1 = 810000,
+};
+
+struct phy_pll_reg {
+ u16 val[7];
+ u32 addr;
+};
+
+static const struct phy_pll_reg phy_pll_27m_cfg[] = {
+ /* 1.62 2.16 2.43 2.7 3.24 4.32 5.4 register address */
+ {{ 0x010E, 0x010E, 0x010E, 0x010E, 0x010E, 0x010E, 0x010E }, CMN_PLL0_VCOCAL_INIT_TMR },
+ {{ 0x001B, 0x001B, 0x001B, 0x001B, 0x001B, 0x001B, 0x001B }, CMN_PLL0_VCOCAL_ITER_TMR },
+ {{ 0x30B9, 0x3087, 0x3096, 0x30B4, 0x30B9, 0x3087, 0x30B4 }, CMN_PLL0_VCOCAL_START },
+ {{ 0x0077, 0x009F, 0x00B3, 0x00C7, 0x0077, 0x009F, 0x00C7 }, CMN_PLL0_INTDIV },
+ {{ 0xF9DA, 0xF7CD, 0xF6C7, 0xF5C1, 0xF9DA, 0xF7CD, 0xF5C1 }, CMN_PLL0_FRACDIV },
+ {{ 0x001E, 0x0028, 0x002D, 0x0032, 0x001E, 0x0028, 0x0032 }, CMN_PLL0_HIGH_THR },
+ {{ 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020 }, CMN_PLL0_DSM_DIAG },
+ {{ 0x0000, 0x1000, 0x1000, 0x1000, 0x0000, 0x1000, 0x1000 }, CMN_PLLSM0_USER_DEF_CTRL },
+ {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_OVRD },
+ {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_FBH_OVRD },
+ {{ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000 }, CMN_DIAG_PLL0_FBL_OVRD },
+ {{ 0x0006, 0x0007, 0x0007, 0x0007, 0x0006, 0x0007, 0x0007 }, CMN_DIAG_PLL0_V2I_TUNE },
+ {{ 0x0043, 0x0043, 0x0043, 0x0042, 0x0043, 0x0043, 0x0042 }, CMN_DIAG_PLL0_CP_TUNE },
+ {{ 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008, 0x0008 }, CMN_DIAG_PLL0_LF_PROG },
+ {{ 0x0100, 0x0001, 0x0001, 0x0001, 0x0100, 0x0001, 0x0001 }, CMN_DIAG_PLL0_PTATIS_TUNE1 },
+ {{ 0x0007, 0x0001, 0x0001, 0x0001, 0x0007, 0x0001, 0x0001 }, CMN_DIAG_PLL0_PTATIS_TUNE2 },
+ {{ 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020, 0x0020 }, CMN_DIAG_PLL0_TEST_MODE},
+ {{ 0x0016, 0x0016, 0x0016, 0x0016, 0x0016, 0x0016, 0x0016 }, CMN_PSM_CLK_CTRL }
+};
+
+static int link_rate_index(u32 rate)
+{
+ switch (rate) {
+ case RATE_1_6:
+ return 0;
+ case RATE_2_1:
+ return 1;
+ case RATE_2_4:
+ return 2;
+ case RATE_2_7:
+ return 3;
+ case RATE_3_2:
+ return 4;
+ case RATE_4_3:
+ return 5;
+ case RATE_5_4:
+ return 6;
+ default:
+ return -1;
+ }
+}
+
+static void dp_aux_cfg(struct cdns_mhdp_device *mhdp)
+{
+ /* Power up Aux */
+ cdns_phy_reg_write(mhdp, TXDA_CYA_AUXDA_CYA, 1);
+
+ cdns_phy_reg_write(mhdp, TX_DIG_CTRL_REG_1, 0x3);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_DIG_CTRL_REG_2, 36);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_2, 0x0100);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_2, 0x0300);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_3, 0x0000);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_1, 0x2008);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_1, 0x2018);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_1, 0xA018);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_2, 0x030C);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_5, 0x0000);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_4, 0x1001);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_1, 0xA098);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_1, 0xA198);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_2, 0x030d);
+ ndelay(150);
+ cdns_phy_reg_write(mhdp, TX_ANA_CTRL_REG_2, 0x030f);
+}
+
+/* PMA common configuration for 27MHz */
+static void dp_phy_pma_cmn_cfg_27mhz(struct cdns_mhdp_device *mhdp)
+{
+ u32 num_lanes = mhdp->dp.num_lanes;
+ u16 val;
+ int k;
+
+ val = cdns_phy_reg_read(mhdp, PHY_PMA_CMN_CTRL1);
+ val &= 0xFFF7;
+ val |= 0x0008;
+ cdns_phy_reg_write(mhdp, PHY_PMA_CMN_CTRL1, val);
+
+ /* Startup state machine registers */
+ cdns_phy_reg_write(mhdp, CMN_SSM_BIAS_TMR, 0x0087);
+ cdns_phy_reg_write(mhdp, CMN_PLLSM0_PLLEN_TMR, 0x001B);
+ cdns_phy_reg_write(mhdp, CMN_PLLSM0_PLLPRE_TMR, 0x0036);
+ cdns_phy_reg_write(mhdp, CMN_PLLSM0_PLLVREF_TMR, 0x001B);
+ cdns_phy_reg_write(mhdp, CMN_PLLSM0_PLLLOCK_TMR, 0x006C);
+
+ /* Current calibration registers */
+ cdns_phy_reg_write(mhdp, CMN_ICAL_INIT_TMR, 0x0044);
+ cdns_phy_reg_write(mhdp, CMN_ICAL_ITER_TMR, 0x0006);
+ cdns_phy_reg_write(mhdp, CMN_ICAL_ADJ_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_ICAL_ADJ_ITER_TMR, 0x0006);
+
+ /* Resistor calibration registers */
+ cdns_phy_reg_write(mhdp, CMN_TXPUCAL_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_TXPUCAL_ITER_TMR, 0x0006);
+ cdns_phy_reg_write(mhdp, CMN_TXPU_ADJ_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_TXPU_ADJ_ITER_TMR, 0x0006);
+ cdns_phy_reg_write(mhdp, CMN_TXPDCAL_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_TXPDCAL_ITER_TMR, 0x0006);
+ cdns_phy_reg_write(mhdp, CMN_TXPD_ADJ_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_TXPD_ADJ_ITER_TMR, 0x0006);
+ cdns_phy_reg_write(mhdp, CMN_RXCAL_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_RXCAL_ITER_TMR, 0x0006);
+ cdns_phy_reg_write(mhdp, CMN_RX_ADJ_INIT_TMR, 0x0022);
+ cdns_phy_reg_write(mhdp, CMN_RX_ADJ_ITER_TMR, 0x0006);
+
+ for (k = 0; k < num_lanes; k = k + 1) {
+ /* Power state machine registers */
+ cdns_phy_reg_write(mhdp, XCVR_PSM_CAL_TMR | (k << 9), 0x016D);
+ cdns_phy_reg_write(mhdp, XCVR_PSM_A0IN_TMR | (k << 9), 0x016D);
+ /* Transceiver control and diagnostic registers */
+ cdns_phy_reg_write(mhdp, XCVR_DIAG_LANE_FCM_EN_MGN_TMR | (k << 9), 0x00A2);
+ cdns_phy_reg_write(mhdp, TX_DIAG_BGREF_PREDRV_DELAY | (k << 9), 0x0097);
+ /* Transmitter receiver detect registers */
+ cdns_phy_reg_write(mhdp, TX_RCVDET_EN_TMR | (k << 9), 0x0A8C);
+ cdns_phy_reg_write(mhdp, TX_RCVDET_ST_TMR | (k << 9), 0x0036);
+ }
+}
+
+static void dp_phy_pma_cmn_pll0_27mhz(struct cdns_mhdp_device *mhdp)
+{
+ u32 num_lanes = mhdp->dp.num_lanes;
+ u32 link_rate = mhdp->dp.rate;
+ u16 val;
+ int index, i, k;
+
+ /*
+ * PLL reference clock source select
+ * for single ended reference clock val |= 0x0030;
+ * for differential clock val |= 0x0000;
+ */
+ val = cdns_phy_reg_read(mhdp, PHY_PMA_CMN_CTRL1);
+ val &= 0xFF8F;
+ cdns_phy_reg_write(mhdp, PHY_PMA_CMN_CTRL1, val);
+
+ /* for differential clock on the refclk_p and refclk_m off chip pins:
+ * CMN_DIAG_ACYA[8]=1'b1
+ */
+ cdns_phy_reg_write(mhdp, CMN_DIAG_ACYA, 0x0100);
+
+ /* DP PLL data rate 0/1 clock divider value */
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ val &= 0x00FF;
+ if (link_rate <= RATE_2_7)
+ val |= 0x2400;
+ else
+ val |= 0x1200;
+ cdns_phy_reg_write(mhdp, PHY_HDP_CLK_CTL, val);
+
+ /* High speed clock 0/1 div */
+ val = cdns_phy_reg_read(mhdp, CMN_DIAG_HSCLK_SEL);
+ val &= 0xFFCC;
+ if (link_rate <= RATE_2_7)
+ val |= 0x0011;
+ cdns_phy_reg_write(mhdp, CMN_DIAG_HSCLK_SEL, val);
+
+ for (k = 0; k < num_lanes; k++) {
+ val = cdns_phy_reg_read(mhdp, (XCVR_DIAG_HSCLK_SEL | (k << 9)));
+ val = val & 0xCFFF;
+ if (link_rate <= RATE_2_7)
+ val |= 0x1000;
+ cdns_phy_reg_write(mhdp, (XCVR_DIAG_HSCLK_SEL | (k << 9)), val);
+ }
+
+ /* DP PHY PLL 27MHz configuration */
+ index = link_rate_index(link_rate);
+ for (i = 0; i < ARRAY_SIZE(phy_pll_27m_cfg); i++)
+ cdns_phy_reg_write(mhdp, phy_pll_27m_cfg[i].addr, phy_pll_27m_cfg[i].val[index]);
+
+ /* Transceiver control and diagnostic registers */
+ for (k = 0; k < num_lanes; k++) {
+ val = cdns_phy_reg_read(mhdp, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)));
+ val = val & 0x8FFF;
+ if (link_rate <= RATE_2_7)
+ val |= 0x2000;
+ else
+ val |= 0x1000;
+ cdns_phy_reg_write(mhdp, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)), val);
+ }
+
+ for (k = 0; k < num_lanes; k = k + 1) {
+ /* Power state machine registers */
+ cdns_phy_reg_write(mhdp, (XCVR_PSM_RCTRL | (k << 9)), 0xBEFC);
+ cdns_phy_reg_write(mhdp, (TX_PSC_A0 | (k << 9)), 0x6799);
+ cdns_phy_reg_write(mhdp, (TX_PSC_A1 | (k << 9)), 0x6798);
+ cdns_phy_reg_write(mhdp, (TX_PSC_A2 | (k << 9)), 0x0098);
+ cdns_phy_reg_write(mhdp, (TX_PSC_A3 | (k << 9)), 0x0098);
+ /* Receiver calibration power state definition register */
+ val = cdns_phy_reg_read(mhdp, RX_PSC_CAL | (k << 9));
+ val &= 0xFFBB;
+ cdns_phy_reg_write(mhdp, (RX_PSC_CAL | (k << 9)), val);
+ val = cdns_phy_reg_read(mhdp, RX_PSC_A0 | (k << 9));
+ val &= 0xFFBB;
+ cdns_phy_reg_write(mhdp, (RX_PSC_A0 | (k << 9)), val);
+ }
+}
+
+static void dp_phy_power_down(struct cdns_mhdp_device *mhdp)
+{
+ u16 val;
+ int i;
+
+ if (!mhdp->power_up)
+ return;
+
+ /* Place the PHY lanes in the A3 power state. */
+ cdns_phy_reg_write(mhdp, PHY_HDP_MODE_CTRL, 0x8);
+ /* Wait for Power State A3 Ack */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_MODE_CTRL);
+ if (val & (1 << 7))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait A3 Ack failed\n");
+ return;
+ }
+
+ /* Disable HDP PLLâs data rate and full rate clocks out of PMA. */
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ val &= ~(1 << 2);
+ cdns_phy_reg_write(mhdp, PHY_HDP_CLK_CTL, val);
+ /* Wait for PLL clock gate ACK */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ if (!(val & (1 << 3)))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait PLL clock gate Ack failed\n");
+ return;
+ }
+
+ /* Disable HDP PLLâs for high speed clocks */
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ val &= ~(1 << 0);
+ cdns_phy_reg_write(mhdp, PHY_HDP_CLK_CTL, val);
+ /* Wait for PLL disable ACK */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ if (!(val & (1 << 1)))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait PLL disable Ack failed\n");
+ return;
+ }
+}
+
+static int dp_phy_power_up(struct cdns_mhdp_device *mhdp)
+{
+ u32 val, i;
+
+ /* Enable HDP PLLâs for high speed clocks */
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ val |= (1 << 0);
+ cdns_phy_reg_write(mhdp, PHY_HDP_CLK_CTL, val);
+ /* Wait for PLL ready ACK */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ if (val & (1 << 1))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait PLL Ack failed\n");
+ return -1;
+ }
+
+ /* Enable HDP PLLâs data rate and full rate clocks out of PMA. */
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ val |= (1 << 2);
+ cdns_phy_reg_write(mhdp, PHY_HDP_CLK_CTL, val);
+ /* Wait for PLL clock enable ACK */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_CLK_CTL);
+ if (val & (1 << 3))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait PLL clock enable ACk failed\n");
+ return -1;
+ }
+
+ /* Configure PHY in A2 Mode */
+ cdns_phy_reg_write(mhdp, PHY_HDP_MODE_CTRL, 0x0004);
+ /* Wait for Power State A2 Ack */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_MODE_CTRL);
+ if (val & (1 << 6))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait A2 Ack failed\n");
+ return -1;
+ }
+
+ /* Configure PHY in A0 mode (PHY must be in the A0 power
+ * state in order to transmit data)
+ */
+ cdns_phy_reg_write(mhdp, PHY_HDP_MODE_CTRL, 0x0101);
+
+ /* Wait for Power State A0 Ack */
+ for (i = 0; i < 10; i++) {
+ val = cdns_phy_reg_read(mhdp, PHY_HDP_MODE_CTRL);
+ if (val & (1 << 4))
+ break;
+ msleep(20);
+ }
+ if (i == 10) {
+ dev_err(mhdp->dev, "Wait A0 Ack failed\n");
+ return -1;
+ }
+
+ mhdp->power_up = true;
+
+ return 0;
+}
+
+int cdns_dp_phy_set_imx8mq(struct cdns_mhdp_device *mhdp)
+{
+ int ret;
+
+ /* Disable phy clock if PHY in power up state */
+ dp_phy_power_down(mhdp);
+
+ dp_phy_pma_cmn_cfg_27mhz(mhdp);
+
+ dp_phy_pma_cmn_pll0_27mhz(mhdp);
+
+ cdns_phy_reg_write(mhdp, TX_DIAG_ACYA_0, 1);
+ cdns_phy_reg_write(mhdp, TX_DIAG_ACYA_1, 1);
+ cdns_phy_reg_write(mhdp, TX_DIAG_ACYA_2, 1);
+ cdns_phy_reg_write(mhdp, TX_DIAG_ACYA_3, 1);
+
+ /* PHY power up */
+ ret = dp_phy_power_up(mhdp);
+ if (ret < 0)
+ return ret;
+
+ dp_aux_cfg(mhdp);
+
+ return ret;
+}
diff --git a/drivers/gpu/drm/imx/mhdp/cdns-mhdp-imxdrv.c b/drivers/gpu/drm/imx/mhdp/cdns-mhdp-imxdrv.c
new file mode 100644
index 000000000000..2dec2e051be6
--- /dev/null
+++ b/drivers/gpu/drm/imx/mhdp/cdns-mhdp-imxdrv.c
@@ -0,0 +1,130 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * copyright (c) 2019-2020 nxp semiconductor, inc.
+ *
+ */
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/component.h>
+#include <drm/drm_of.h>
+#include <drm/drm_vblank.h>
+#include <drm/drm_crtc_helper.h>
+#include <drm/drm_encoder_slave.h>
+
+#include "cdns-mhdp-phy.h"
+#include "../imx-drm.h"
+
+struct imx_mhdp_device {
+ struct cdns_mhdp_device mhdp;
+ struct drm_encoder encoder;
+};
+
+static const struct drm_encoder_funcs cdns_mhdp_imx_encoder_funcs = {
+ .destroy = drm_encoder_cleanup,
+};
+
+static struct cdns_plat_data imx8mq_dp_drv_data = {
+ .plat_name = "imx8mq-dp",
+ .bind = cdns_dp_bind,
+ .unbind = cdns_dp_unbind,
+ .phy_set = cdns_dp_phy_set_imx8mq,
+ .lane_mapping = 0xc6,
+};
+
+static const struct of_device_id cdns_mhdp_imx_dt_ids[] = {
+ { .compatible = "nxp,imx8mq-cdns-dp",
+ .data = &imx8mq_dp_drv_data
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, cdns_mhdp_imx_dt_ids);
+
+static int cdns_mhdp_imx_bind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct platform_device *pdev = to_platform_device(dev);
+ const struct cdns_plat_data *plat_data;
+ const struct of_device_id *match;
+ struct drm_device *drm = data;
+ struct drm_encoder *encoder;
+ struct imx_mhdp_device *imx_mhdp;
+ int ret;
+
+ if (!pdev->dev.of_node)
+ return -ENODEV;
+
+ imx_mhdp = devm_kzalloc(&pdev->dev, sizeof(*imx_mhdp), GFP_KERNEL);
+ if (!imx_mhdp)
+ return -ENOMEM;
+
+ match = of_match_node(cdns_mhdp_imx_dt_ids, pdev->dev.of_node);
+ plat_data = match->data;
+ encoder = &imx_mhdp->encoder;
+
+ encoder->possible_crtcs = drm_of_find_possible_crtcs(drm, dev->of_node);
+
+ /*
+ * If we failed to find the CRTC(s) which this encoder is
+ * supposed to be connected to, it's because the CRTC has
+ * not been registered yet. Defer probing, and hope that
+ * the required CRTC is added later.
+ */
+ if (encoder->possible_crtcs == 0)
+ return -EPROBE_DEFER;
+
+ drm_encoder_init(drm, encoder, &cdns_mhdp_imx_encoder_funcs,
+ DRM_MODE_ENCODER_TMDS, NULL);
+
+
+ imx_mhdp->mhdp.plat_data = plat_data;
+ imx_mhdp->mhdp.dev = dev;
+ ret = plat_data->bind(pdev, encoder, &imx_mhdp->mhdp);
+ /*
+ * If cdns_mhdp_bind() fails we'll never call cdns_mhdp_unbind(),
+ * which would have called the encoder cleanup. Do it manually.
+ */
+ if (ret < 0)
+ drm_encoder_cleanup(encoder);
+
+ return ret;
+}
+
+static void cdns_mhdp_imx_unbind(struct device *dev, struct device *master,
+ void *data)
+{
+ struct imx_mhdp_device *imx_mhdp = dev_get_drvdata(dev);
+
+ imx_mhdp->mhdp.plat_data->unbind(dev);
+}
+
+static const struct component_ops cdns_mhdp_imx_ops = {
+ .bind = cdns_mhdp_imx_bind,
+ .unbind = cdns_mhdp_imx_unbind,
+};
+
+static int cdns_mhdp_imx_probe(struct platform_device *pdev)
+{
+ return component_add(&pdev->dev, &cdns_mhdp_imx_ops);
+}
+
+static int cdns_mhdp_imx_remove(struct platform_device *pdev)
+{
+ component_del(&pdev->dev, &cdns_mhdp_imx_ops);
+
+ return 0;
+}
+
+static struct platform_driver cdns_mhdp_imx_platform_driver = {
+ .probe = cdns_mhdp_imx_probe,
+ .remove = cdns_mhdp_imx_remove,
+ .driver = {
+ .name = "cdns-mhdp-imx",
+ .of_match_table = cdns_mhdp_imx_dt_ids,
+ },
+};
+
+module_platform_driver(cdns_mhdp_imx_platform_driver);
+
+MODULE_AUTHOR("Sandor YU <sandor.yu@xxxxxxx>");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:cdnsmhdp-imx");
diff --git a/drivers/gpu/drm/imx/mhdp/cdns-mhdp-phy.h b/drivers/gpu/drm/imx/mhdp/cdns-mhdp-phy.h
new file mode 100644
index 000000000000..79b1907726db
--- /dev/null
+++ b/drivers/gpu/drm/imx/mhdp/cdns-mhdp-phy.h
@@ -0,0 +1,146 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2019-2020 NXP Semiconductor, Inc.
+ *
+ */
+#ifndef _CDNS_MHDP_PHY_H
+#define _CDNS_MHDP_PHY_H
+
+#include <drm/bridge/cdns-mhdp.h>
+
+#define CMN_SSM_BIAS_TMR 0x0022
+#define CMN_PLLSM0_PLLEN_TMR 0x0029
+#define CMN_PLLSM0_PLLPRE_TMR 0x002A
+#define CMN_PLLSM0_PLLVREF_TMR 0x002B
+#define CMN_PLLSM0_PLLLOCK_TMR 0x002C
+#define CMN_PLLSM0_USER_DEF_CTRL 0x002F
+#define CMN_PSM_CLK_CTRL 0x0061
+#define CMN_CDIAG_REFCLK_CTRL 0x0062
+#define CMN_PLL0_VCOCAL_START 0x0081
+#define CMN_PLL0_VCOCAL_INIT_TMR 0x0084
+#define CMN_PLL0_VCOCAL_ITER_TMR 0x0085
+#define CMN_PLL0_INTDIV 0x0094
+#define CMN_PLL0_FRACDIV 0x0095
+#define CMN_PLL0_HIGH_THR 0x0096
+#define CMN_PLL0_DSM_DIAG 0x0097
+#define CMN_PLL0_SS_CTRL1 0x0098
+#define CMN_PLL0_SS_CTRL2 0x0099
+#define CMN_ICAL_INIT_TMR 0x00C4
+#define CMN_ICAL_ITER_TMR 0x00C5
+#define CMN_RXCAL_INIT_TMR 0x00D4
+#define CMN_RXCAL_ITER_TMR 0x00D5
+#define CMN_TXPUCAL_CTRL 0x00E0
+#define CMN_TXPUCAL_INIT_TMR 0x00E4
+#define CMN_TXPUCAL_ITER_TMR 0x00E5
+#define CMN_TXPDCAL_CTRL 0x00F0
+#define CMN_TXPDCAL_INIT_TMR 0x00F4
+#define CMN_TXPDCAL_ITER_TMR 0x00F5
+#define CMN_ICAL_ADJ_INIT_TMR 0x0102
+#define CMN_ICAL_ADJ_ITER_TMR 0x0103
+#define CMN_RX_ADJ_INIT_TMR 0x0106
+#define CMN_RX_ADJ_ITER_TMR 0x0107
+#define CMN_TXPU_ADJ_CTRL 0x0108
+#define CMN_TXPU_ADJ_INIT_TMR 0x010A
+#define CMN_TXPU_ADJ_ITER_TMR 0x010B
+#define CMN_TXPD_ADJ_CTRL 0x010c
+#define CMN_TXPD_ADJ_INIT_TMR 0x010E
+#define CMN_TXPD_ADJ_ITER_TMR 0x010F
+#define CMN_DIAG_PLL0_FBH_OVRD 0x01C0
+#define CMN_DIAG_PLL0_FBL_OVRD 0x01C1
+#define CMN_DIAG_PLL0_OVRD 0x01C2
+#define CMN_DIAG_PLL0_TEST_MODE 0x01C4
+#define CMN_DIAG_PLL0_V2I_TUNE 0x01C5
+#define CMN_DIAG_PLL0_CP_TUNE 0x01C6
+#define CMN_DIAG_PLL0_LF_PROG 0x01C7
+#define CMN_DIAG_PLL0_PTATIS_TUNE1 0x01C8
+#define CMN_DIAG_PLL0_PTATIS_TUNE2 0x01C9
+#define CMN_DIAG_PLL0_INCLK_CTRL 0x01CA
+#define CMN_DIAG_PLL0_PXL_DIVH 0x01CB
+#define CMN_DIAG_PLL0_PXL_DIVL 0x01CC
+#define CMN_DIAG_HSCLK_SEL 0x01E0
+#define CMN_DIAG_PER_CAL_ADJ 0x01EC
+#define CMN_DIAG_CAL_CTRL 0x01ED
+#define CMN_DIAG_ACYA 0x01FF
+#define XCVR_PSM_RCTRL 0x4001
+#define XCVR_PSM_CAL_TMR 0x4002
+#define XCVR_PSM_A0IN_TMR 0x4003
+#define TX_TXCC_CAL_SCLR_MULT_0 0x4047
+#define TX_TXCC_CPOST_MULT_00_0 0x404C
+#define TX_TXCC_MGNFS_MULT_000_0 0x4050
+#define XCVR_DIAG_PLLDRC_CTRL 0x40E0
+#define XCVR_DIAG_PLLDRC_CTRL 0x40E0
+#define XCVR_DIAG_HSCLK_SEL 0x40E1
+#define XCVR_DIAG_BIDI_CTRL 0x40E8
+#define XCVR_DIAG_LANE_FCM_EN_MGN_TMR 0x40F2
+#define XCVR_DIAG_LANE_FCM_EN_MGN 0x40F2
+#define TX_PSC_A0 0x4100
+#define TX_PSC_A1 0x4101
+#define TX_PSC_A2 0x4102
+#define TX_PSC_A3 0x4103
+#define TX_RCVDET_CTRL 0x4120
+#define TX_RCVDET_EN_TMR 0x4122
+#define TX_RCVDET_EN_TMR 0x4122
+#define TX_RCVDET_ST_TMR 0x4123
+#define TX_RCVDET_ST_TMR 0x4123
+#define TX_BIST_CTRL 0x4140
+#define TX_BIST_UDDWR 0x4141
+#define TX_DIAG_TX_CTRL 0x41E0
+#define TX_DIAG_TX_DRV 0x41E1
+#define TX_DIAG_BGREF_PREDRV_DELAY 0x41E7
+#define TX_DIAG_BGREF_PREDRV_DELAY 0x41E7
+#define XCVR_PSM_RCTRL_1 0x4201
+#define TX_TXCC_CAL_SCLR_MULT_1 0x4247
+#define TX_TXCC_CPOST_MULT_00_1 0x424C
+#define TX_TXCC_MGNFS_MULT_000_1 0x4250
+#define XCVR_DIAG_PLLDRC_CTRL_1 0x42E0
+#define XCVR_DIAG_HSCLK_SEL_1 0x42E1
+#define XCVR_DIAG_LANE_FCM_EN_MGN_TMR_1 0x42F2
+#define TX_RCVDET_EN_TMR_1 0x4322
+#define TX_RCVDET_ST_TMR_1 0x4323
+#define TX_DIAG_ACYA_0 0x41FF
+#define TX_DIAG_ACYA_1 0x43FF
+#define TX_DIAG_ACYA_2 0x45FF
+#define TX_DIAG_ACYA_3 0x47FF
+#define TX_ANA_CTRL_REG_1 0x5020
+#define TX_ANA_CTRL_REG_2 0x5021
+#define TXDA_COEFF_CALC 0x5022
+#define TX_DIG_CTRL_REG_1 0x5023
+#define TX_DIG_CTRL_REG_2 0x5024
+#define TXDA_CYA_AUXDA_CYA 0x5025
+#define TX_ANA_CTRL_REG_3 0x5026
+#define TX_ANA_CTRL_REG_4 0x5027
+#define TX_ANA_CTRL_REG_5 0x5029
+#define RX_PSC_A0 0x8000
+#define RX_PSC_CAL 0x8006
+#define PMA_LANE_CFG 0xC000
+#define PIPE_CMN_CTRL1 0xC001
+#define PIPE_CMN_CTRL2 0xC002
+#define PIPE_COM_LOCK_CFG1 0xC003
+#define PIPE_COM_LOCK_CFG2 0xC004
+#define PIPE_RCV_DET_INH 0xC005
+#define PHY_HDP_MODE_CTRL 0xC008
+#define PHY_HDP_CLK_CTL 0xC009
+#define STS 0xC00F
+#define PHY_ISO_CMN_CTRL 0xC010
+#define PHY_ISO_CMN_CTRL 0xC010
+#define PHY_HDP_TX_CTL_L0 0xC408
+#define PHY_DP_TX_CTL 0xC408
+#define PHY_HDP_TX_CTL_L1 0xC448
+#define PHY_HDP_TX_CTL_L2 0xC488
+#define PHY_HDP_TX_CTL_L3 0xC4C8
+#define PHY_PMA_CMN_CTRL1 0xC800
+#define PMA_CMN_CTRL1 0xC800
+#define PHY_PMA_ISO_CMN_CTRL 0xC810
+#define PHY_PMA_ISO_PLL_CTRL1 0xC812
+#define PHY_PMA_ISOLATION_CTRL 0xC81F
+#define PHY_ISOLATION_CTRL 0xC81F
+#define PHY_PMA_ISO_XCVR_CTRL 0xCC11
+#define PHY_PMA_ISO_LINK_MODE 0xCC12
+#define PHY_PMA_ISO_PWRST_CTRL 0xCC13
+#define PHY_PMA_ISO_TX_DATA_LO 0xCC14
+#define PHY_PMA_ISO_TX_DATA_HI 0xCC15
+#define PHY_PMA_ISO_RX_DATA_LO 0xCC16
+#define PHY_PMA_ISO_RX_DATA_HI 0xCC17
+
+int cdns_dp_phy_set_imx8mq(struct cdns_mhdp_device *hdp);
+#endif /* _CDNS_MHDP_PHY_H */
--
2.17.1