On Tue, Oct 29, 2024 at 02:02:14PM +0800, Sandor Yu wrote:
> Add Cadence HDP-TX DisplayPort and HDMI PHY driver for i.MX8MQ.
>
> Cadence HDP-TX PHY could be put in either DP mode or
> HDMI mode base on the configuration chosen.
> DisplayPort or HDMI PHY mode is configured in the driver.
>
> Signed-off-by: Sandor Yu <Sandor.yu@xxxxxxx>
> Signed-off-by: Alexander Stein <alexander.stein@xxxxxxxxxxxxxxx>
> ---
> v17->v18:
> - fix build error as code rebase to latest kernel version.
>
> drivers/phy/freescale/Kconfig | 10 +
> drivers/phy/freescale/Makefile | 1 +
> drivers/phy/freescale/phy-fsl-imx8mq-hdptx.c | 1337 ++++++++++++++++++
> 3 files changed, 1348 insertions(+)
> create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-hdptx.c
>
> diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
> index dcd9acff6d01a..2b1210367b31c 100644
> --- a/drivers/phy/freescale/Kconfig
> +++ b/drivers/phy/freescale/Kconfig
> @@ -35,6 +35,16 @@ config PHY_FSL_IMX8M_PCIE
> Enable this to add support for the PCIE PHY as found on
> i.MX8M family of SOCs.
>
> +config PHY_FSL_IMX8MQ_HDPTX
> + tristate "Freescale i.MX8MQ DP/HDMI PHY support"
> + depends on OF && HAS_IOMEM
> + depends on COMMON_CLK
> + select GENERIC_PHY
> + select CDNS_MHDP_HELPER
This can have problems with being satisfied on randconfig builds,
because CDNS_MHDP_HELPER is deep inside the DRM tree.
> + help
> + Enable this to support the Cadence HDPTX DP/HDMI PHY driver
> + on i.MX8MQ SOC.
> +
> config PHY_FSL_IMX8QM_HSIO
> tristate "Freescale i.MX8QM HSIO PHY"
> depends on OF && HAS_IOMEM
> diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile
> index 658eac7d0a622..a946b87905498 100644
> --- a/drivers/phy/freescale/Makefile
> +++ b/drivers/phy/freescale/Makefile
> @@ -1,4 +1,5 @@
> # SPDX-License-Identifier: GPL-2.0-only
> +obj-$(CONFIG_PHY_FSL_IMX8MQ_HDPTX) += phy-fsl-imx8mq-hdptx.o
> obj-$(CONFIG_PHY_FSL_IMX8MQ_USB) += phy-fsl-imx8mq-usb.o
> obj-$(CONFIG_PHY_MIXEL_LVDS_PHY) += phy-fsl-imx8qm-lvds-phy.o
> obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY) += phy-fsl-imx8-mipi-dphy.o
> diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-hdptx.c b/drivers/phy/freescale/phy-fsl-imx8mq-hdptx.c
> new file mode 100644
> index 0000000000000..7aac39df0ab02
> --- /dev/null
> +++ b/drivers/phy/freescale/phy-fsl-imx8mq-hdptx.c
> @@ -0,0 +1,1337 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Cadence DP/HDMI PHY driver
> + *
> + * Copyright (C) 2022-2024 NXP Semiconductor, Inc.
> + */
> +#include <drm/bridge/cdns-mhdp-helper.h>
> +#include <linux/clk.h>
> +#include <linux/kernel.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/io.h>
> +#include <linux/unaligned.h>
> +
> +#define ADDR_PHY_AFE 0x80000
> +
> +/* PHY registers */
> +#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_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 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 TX_PSC_A0 0x4100
> +#define TX_PSC_A1 0x4101
> +#define TX_PSC_A2 0x4102
> +#define TX_PSC_A3 0x4103
> +#define TX_RCVDET_EN_TMR 0x4122
> +#define TX_RCVDET_ST_TMR 0x4123
> +#define TX_DIAG_TX_CTRL 0x41e0
> +#define TX_DIAG_TX_DRV 0x41e1
> +#define TX_DIAG_BGREF_PREDRV_DELAY 0x41e7
> +#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 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 PHY_HDP_MODE_CTRL 0xc008
> +#define PHY_HDP_CLK_CTL 0xc009
> +#define PHY_ISO_CMN_CTRL 0xc010
> +#define PHY_PMA_CMN_CTRL1 0xc800
> +#define PHY_PMA_ISO_CMN_CTRL 0xc810
> +#define PHY_PMA_ISO_PLL_CTRL1 0xc812
> +#define PHY_PMA_ISOLATION_CTRL 0xc81f
> +
> +/* PHY_HDP_CLK_CTL */
> +#define PLL_DATA_RATE_CLK_DIV_MASK GENMASK(15, 8)
> +#define PLL_DATA_RATE_CLK_DIV_HBR 0x24
> +#define PLL_DATA_RATE_CLK_DIV_HBR2 0x12
> +#define PLL_CLK_EN_ACK BIT(3)
> +#define PLL_CLK_EN BIT(2)
> +#define PLL_READY BIT(1)
> +#define PLL_EN BIT(0)
> +
> +/* PHY_PMA_CMN_CTRL1 */
> +#define CMA_REF_CLK_DIG_DIV_MASK GENMASK(13, 12)
> +#define CMA_REF_CLK_SEL_MASK GENMASK(6, 4)
> +#define CMA_REF_CLK_RCV_EN_MASK BIT(3)
> +#define CMA_REF_CLK_RCV_EN 1
> +#define CMN_READY BIT(0)
> +
> +/* PHY_PMA_ISO_PLL_CTRL1 */
> +#define CMN_PLL0_CLK_DATART_DIV_MASK GENMASK(7, 0)
> +
> +/* TX_DIAG_TX_DRV */
> +#define TX_DRIVER_PROG_BOOST_ENABLE BIT(10)
> +#define TX_DRIVER_PROG_BOOST_LEVEL_MASK GENMASK(9, 8)
> +#define TX_DRIVER_LDO_BG_DEPENDENT_REF_ENABLE BIT(7)
> +#define TX_DRIVER_LDO_BANDGAP_REF_ENABLE BIT(6)
> +
> +/* TX_TXCC_CAL_SCLR_MULT_0 */
> +#define SCALED_RESISTOR_CALIBRATION_CODE_ADD BIT(8)
> +#define RESISTOR_CAL_MULT_VAL_32_128 BIT(5)
> +
> +/* CMN_CDIAG_REFCLK_CTRL */
> +#define DIG_REF_CLK_DIV_SCALER_MASK GENMASK(14, 12)
> +#define REFCLK_TERMINATION_EN_OVERRIDE_EN BIT(7)
> +#define REFCLK_TERMINATION_EN_OVERRIDE BIT(6)
> +
> +/* CMN_DIAG_HSCLK_SEL */
> +#define HSCLK1_SEL_MASK GENMASK(5, 4)
> +#define HSCLK0_SEL_MASK GENMASK(1, 0)
> +#define HSCLK_PLL0_DIV2 1
> +
> +/* XCVR_DIAG_HSCLK_SEL */
> +#define HSCLK_SEL_MODE3_MASK GENMASK(13, 12)
> +#define HSCLK_SEL_MODE3_HSCLK1 1
> +
> +/* CMN_PLL0_VCOCAL_START */
> +#define VCO_CALIB_CODE_START_POINT_VAL_MASK GENMASK(8, 0)
> +
> +/* CMN_DIAG_PLL0_FBH_OVRD */
> +#define PLL_FEEDBACK_DIV_HI_OVERRIDE_EN BIT(15)
> +
> +/* CMN_DIAG_PLL0_FBL_OVRD */
> +#define PLL_FEEDBACK_DIV_LO_OVERRIDE_EN BIT(15)
> +
> +/* CMN_DIAG_PLL0_PXL_DIVH */
> +#define PLL_PCLK_DIV_EN BIT(15)
> +
> +/* XCVR_DIAG_PLLDRC_CTRL */
> +#define DPLL_CLK_SEL_MODE3 BIT(14)
> +#define DPLL_DATA_RATE_DIV_MODE3_MASK GENMASK(13, 12)
> +
> +/* TX_DIAG_TX_CTRL */
> +#define TX_IF_SUBRATE_MODE3_MASK GENMASK(7, 6)
> +
> +/* PHY_HDP_MODE_CTRL */
> +#define POWER_STATE_A3_ACK BIT(7)
> +#define POWER_STATE_A2_ACK BIT(6)
> +#define POWER_STATE_A1_ACK BIT(5)
> +#define POWER_STATE_A0_ACK BIT(4)
> +#define POWER_STATE_A3 BIT(3)
> +#define POWER_STATE_A2 BIT(2)
> +#define POWER_STATE_A1 BIT(1)
> +#define POWER_STATE_A0 BIT(0)
> +
> +/* PHY_PMA_ISO_CMN_CTRL */
> +#define CMN_MACRO_PWR_EN_ACK BIT(5)
> +
> +#define KEEP_ALIVE 0x18
> +
> +#define REF_CLK_27MHZ 27000000
> +
> +/* HDMI TX clock control settings */
> +struct hdptx_hdmi_ctrl {
> + u32 pixel_clk_freq_min;
> + u32 pixel_clk_freq_max;
> + u32 feedback_factor;
> + u32 data_range_kbps_min;
> + u32 data_range_kbps_max;
> + u32 cmnda_pll0_ip_div;
> + u32 cmn_ref_clk_dig_div;
> + u32 ref_clk_divider_scaler;
> + u32 pll_fb_div_total;
> + u32 cmnda_pll0_fb_div_low;
> + u32 cmnda_pll0_fb_div_high;
> + u32 pixel_div_total;
> + u32 cmnda_pll0_pxdiv_low;
> + u32 cmnda_pll0_pxdiv_high;
> + u32 vco_freq_min;
> + u32 vco_freq_max;
> + u32 vco_ring_select;
> + u32 cmnda_hs_clk_0_sel;
> + u32 cmnda_hs_clk_1_sel;
> + u32 hsclk_div_at_xcvr;
> + u32 hsclk_div_tx_sub_rate;
> + u32 cmnda_pll0_hs_sym_div_sel;
> + u32 cmnda_pll0_clk_freq_min;
> + u32 cmnda_pll0_clk_freq_max;
> +};
> +
> +struct cdns_hdptx_phy {
> + struct cdns_mhdp_base base;
> +
> + void __iomem *regs; /* DPTX registers base */
> + struct device *dev;
> + struct phy *phy;
> + struct clk *ref_clk, *apb_clk;
> + u32 ref_clk_rate;
> + bool power_up;
> + union {
> + struct phy_configure_opts_hdmi hdmi;
> + struct phy_configure_opts_dp dp;
> + };
> +};
> +
> +/* HDMI TX clock control settings, pixel clock is output */
> +static const struct hdptx_hdmi_ctrl pixel_clk_output_ctrl_table[] = {
> +/*Minclk Maxclk Fdbak DR_min DR_max ip_d dig DS Totl */
> +{ 27000, 27000, 1000, 270000, 270000, 0x03, 0x1, 0x1, 240, 0x0bc, 0x030, 80, 0x026, 0x026, 2160000, 2160000, 0, 2, 2, 2, 4, 0x3, 27000, 27000},
> +{ 27000, 27000, 1250, 337500, 337500, 0x03, 0x1, 0x1, 300, 0x0ec, 0x03c, 100, 0x030, 0x030, 2700000, 2700000, 0, 2, 2, 2, 4, 0x3, 33750, 33750},
> +{ 27000, 27000, 1500, 405000, 405000, 0x03, 0x1, 0x1, 360, 0x11c, 0x048, 120, 0x03a, 0x03a, 3240000, 3240000, 0, 2, 2, 2, 4, 0x3, 40500, 40500},
> +{ 27000, 27000, 2000, 540000, 540000, 0x03, 0x1, 0x1, 240, 0x0bc, 0x030, 80, 0x026, 0x026, 2160000, 2160000, 0, 2, 2, 2, 4, 0x2, 54000, 54000},
> +{ 54000, 54000, 1000, 540000, 540000, 0x03, 0x1, 0x1, 480, 0x17c, 0x060, 80, 0x026, 0x026, 4320000, 4320000, 1, 2, 2, 2, 4, 0x3, 54000, 54000},
> +{ 54000, 54000, 1250, 675000, 675000, 0x04, 0x1, 0x1, 400, 0x13c, 0x050, 50, 0x017, 0x017, 2700000, 2700000, 0, 1, 1, 2, 4, 0x2, 67500, 67500},
> +{ 54000, 54000, 1500, 810000, 810000, 0x04, 0x1, 0x1, 480, 0x17c, 0x060, 60, 0x01c, 0x01c, 3240000, 3240000, 0, 2, 2, 2, 2, 0x2, 81000, 81000},
> +{ 54000, 54000, 2000, 1080000, 1080000, 0x03, 0x1, 0x1, 240, 0x0bc, 0x030, 40, 0x012, 0x012, 2160000, 2160000, 0, 2, 2, 2, 1, 0x1, 108000, 108000},
> +{ 74250, 74250, 1000, 742500, 742500, 0x03, 0x1, 0x1, 660, 0x20c, 0x084, 80, 0x026, 0x026, 5940000, 5940000, 1, 2, 2, 2, 4, 0x3, 74250, 74250},
> +{ 74250, 74250, 1250, 928125, 928125, 0x04, 0x1, 0x1, 550, 0x1b4, 0x06e, 50, 0x017, 0x017, 3712500, 3712500, 1, 1, 1, 2, 4, 0x2, 92812, 92812},
> +{ 74250, 74250, 1500, 1113750, 1113750, 0x04, 0x1, 0x1, 660, 0x20c, 0x084, 60, 0x01c, 0x01c, 4455000, 4455000, 1, 2, 2, 2, 2, 0x2, 111375, 111375},
> +{ 74250, 74250, 2000, 1485000, 1485000, 0x03, 0x1, 0x1, 330, 0x104, 0x042, 40, 0x012, 0x012, 2970000, 2970000, 0, 2, 2, 2, 1, 0x1, 148500, 148500},
> +{ 99000, 99000, 1000, 990000, 990000, 0x03, 0x1, 0x1, 440, 0x15c, 0x058, 40, 0x012, 0x012, 3960000, 3960000, 1, 2, 2, 2, 2, 0x2, 99000, 99000},
> +{ 99000, 99000, 1250, 1237500, 1237500, 0x03, 0x1, 0x1, 275, 0x0d8, 0x037, 25, 0x00b, 0x00a, 2475000, 2475000, 0, 1, 1, 2, 2, 0x1, 123750, 123750},
> +{ 99000, 99000, 1500, 1485000, 1485000, 0x03, 0x1, 0x1, 330, 0x104, 0x042, 30, 0x00d, 0x00d, 2970000, 2970000, 0, 2, 2, 2, 1, 0x1, 148500, 148500},
> +{ 99000, 99000, 2000, 1980000, 1980000, 0x03, 0x1, 0x1, 440, 0x15c, 0x058, 40, 0x012, 0x012, 3960000, 3960000, 1, 2, 2, 2, 1, 0x1, 198000, 198000},
> +{148500, 148500, 1000, 1485000, 1485000, 0x03, 0x1, 0x1, 660, 0x20c, 0x084, 40, 0x012, 0x012, 5940000, 5940000, 1, 2, 2, 2, 2, 0x2, 148500, 148500},
> +{148500, 148500, 1250, 1856250, 1856250, 0x04, 0x1, 0x1, 550, 0x1b4, 0x06e, 25, 0x00b, 0x00a, 3712500, 3712500, 1, 1, 1, 2, 2, 0x1, 185625, 185625},
> +{148500, 148500, 1500, 2227500, 2227500, 0x03, 0x1, 0x1, 495, 0x188, 0x063, 30, 0x00d, 0x00d, 4455000, 4455000, 1, 1, 1, 2, 2, 0x1, 222750, 222750},
> +{148500, 148500, 2000, 2970000, 2970000, 0x03, 0x1, 0x1, 660, 0x20c, 0x084, 40, 0x012, 0x012, 5940000, 5940000, 1, 2, 2, 2, 1, 0x1, 297000, 297000},
> +{198000, 198000, 1000, 1980000, 1980000, 0x03, 0x1, 0x1, 220, 0x0ac, 0x02c, 10, 0x003, 0x003, 1980000, 1980000, 0, 1, 1, 2, 1, 0x0, 198000, 198000},
> +{198000, 198000, 1250, 2475000, 2475000, 0x03, 0x1, 0x1, 550, 0x1b4, 0x06e, 25, 0x00b, 0x00a, 4950000, 4950000, 1, 1, 1, 2, 2, 0x1, 247500, 247500},
> +{198000, 198000, 1500, 2970000, 2970000, 0x03, 0x1, 0x1, 330, 0x104, 0x042, 15, 0x006, 0x005, 2970000, 2970000, 0, 1, 1, 2, 1, 0x0, 297000, 297000},
> +{198000, 198000, 2000, 3960000, 3960000, 0x03, 0x1, 0x1, 440, 0x15c, 0x058, 20, 0x008, 0x008, 3960000, 3960000, 1, 1, 1, 2, 1, 0x0, 396000, 396000},
> +{297000, 297000, 1000, 2970000, 2970000, 0x03, 0x1, 0x1, 330, 0x104, 0x042, 10, 0x003, 0x003, 2970000, 2970000, 0, 1, 1, 2, 1, 0x0, 297000, 297000},
> +{297000, 297000, 1500, 4455000, 4455000, 0x03, 0x1, 0x1, 495, 0x188, 0x063, 15, 0x006, 0x005, 4455000, 4455000, 1, 1, 1, 2, 1, 0x0, 445500, 445500},
> +{297000, 297000, 2000, 5940000, 5940000, 0x03, 0x1, 0x1, 660, 0x20c, 0x084, 20, 0x008, 0x008, 5940000, 5940000, 1, 1, 1, 2, 1, 0x0, 594000, 594000},
> +{594000, 594000, 1000, 5940000, 5940000, 0x03, 0x1, 0x1, 660, 0x20c, 0x084, 10, 0x003, 0x003, 5940000, 5940000, 1, 1, 1, 2, 1, 0x0, 594000, 594000},
> +{594000, 594000, 750, 4455000, 4455000, 0x03, 0x1, 0x1, 495, 0x188, 0x063, 10, 0x003, 0x003, 4455000, 4455000, 1, 1, 1, 2, 1, 0x0, 445500, 445500},
> +{594000, 594000, 625, 3712500, 3712500, 0x04, 0x1, 0x1, 550, 0x1b4, 0x06e, 10, 0x003, 0x003, 3712500, 3712500, 1, 1, 1, 2, 1, 0x0, 371250, 371250},
> +{594000, 594000, 500, 2970000, 2970000, 0x03, 0x1, 0x1, 660, 0x20c, 0x084, 10, 0x003, 0x003, 5940000, 5940000, 1, 1, 1, 2, 2, 0x1, 297000, 297000},
Is there a chance that this table or a part of it can be simplified or
calculated at runtime? For example, I think in all the cases minclk =
maxclk and DR_min = DR_max, dig and DS are always 0x1, etc.
> +};
> +
> +/* HDMI TX PLL tuning settings */
> +struct hdptx_hdmi_pll_tuning {
> + u32 vco_freq_bin;
> + u32 vco_freq_min;
> + u32 vco_freq_max;
> + u32 volt_to_current_coarse;
> + u32 volt_to_current;
> + u32 ndac_ctrl;
> + u32 pmos_ctrl;
> + u32 ptat_ndac_ctrl;
> + u32 feedback_div_total;
> + u32 charge_pump_gain;
> + u32 coarse_code;
> + u32 v2i_code;
> + u32 vco_cal_code;
> +};
> +
> +/* HDMI TX PLL tuning settings, pixel clock is output */
> +static const struct hdptx_hdmi_pll_tuning pixel_clk_output_pll_table[] = {
> +/*bin VCO_freq min/max coar cod NDAC PMOS PTAT div-T P-Gain Coa V2I CAL */
> +{ 1, 1980000, 1980000, 0x4, 0x3, 0x0, 0x09, 0x09, 220, 0x42, 160, 5, 183 },
> +{ 2, 2160000, 2160000, 0x4, 0x3, 0x0, 0x09, 0x09, 240, 0x42, 166, 6, 208 },
> +{ 3, 2475000, 2475000, 0x5, 0x3, 0x1, 0x00, 0x07, 275, 0x42, 167, 6, 209 },
> +{ 4, 2700000, 2700000, 0x5, 0x3, 0x1, 0x00, 0x07, 300, 0x42, 188, 6, 230 },
> +{ 4, 2700000, 2700000, 0x5, 0x3, 0x1, 0x00, 0x07, 400, 0x4c, 188, 6, 230 },
> +{ 5, 2970000, 2970000, 0x6, 0x3, 0x1, 0x00, 0x07, 330, 0x42, 183, 6, 225 },
> +{ 6, 3240000, 3240000, 0x6, 0x3, 0x1, 0x00, 0x07, 360, 0x42, 203, 7, 256 },
> +{ 6, 3240000, 3240000, 0x6, 0x3, 0x1, 0x00, 0x07, 480, 0x4c, 203, 7, 256 },
> +{ 7, 3712500, 3712500, 0x4, 0x3, 0x0, 0x07, 0x0F, 550, 0x4c, 212, 7, 257 },
> +{ 8, 3960000, 3960000, 0x5, 0x3, 0x0, 0x07, 0x0F, 440, 0x42, 184, 6, 226 },
> +{ 9, 4320000, 4320000, 0x5, 0x3, 0x1, 0x07, 0x0F, 480, 0x42, 205, 7, 258 },
> +{ 10, 4455000, 4455000, 0x5, 0x3, 0x0, 0x07, 0x0F, 495, 0x42, 219, 7, 272 },
> +{ 10, 4455000, 4455000, 0x5, 0x3, 0x0, 0x07, 0x0F, 660, 0x4c, 219, 7, 272 },
> +{ 11, 4950000, 4950000, 0x6, 0x3, 0x1, 0x00, 0x07, 550, 0x42, 213, 7, 258 },
> +{ 12, 5940000, 5940000, 0x7, 0x3, 0x1, 0x00, 0x07, 660, 0x42, 244, 8, 292 },
> +};
> +
> +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,
> +};
> +
> +#define MAX_LINK_RATE RATE_5_4
> +
> +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 dp_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:
If this is the only usage, please drop the enum.
> + default:
> + return 6;
default should be -EINVAL
> + }
> +}
> +
> +static int cdns_phy_reg_write(struct cdns_hdptx_phy *cdns_phy, u32 addr, u32 val)
> +{
> + return cdns_mhdp_reg_write(&cdns_phy->base, ADDR_PHY_AFE + (addr << 2), val);
> +}
> +
> +static u32 cdns_phy_reg_read(struct cdns_hdptx_phy *cdns_phy, u32 addr)
> +{
> + u32 reg32;
> +
> + cdns_mhdp_reg_read(&cdns_phy->base, ADDR_PHY_AFE + (addr << 2), ®32);
> +
> + return reg32;
> +}
> +
> +static void hdptx_dp_aux_cfg(struct cdns_hdptx_phy *cdns_phy)
> +{
> + /* Power up Aux */
> + cdns_phy_reg_write(cdns_phy, TXDA_CYA_AUXDA_CYA, 1);
> +
> + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_1, 0x3);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_2, 36);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0100);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0300);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_3, 0x0000);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2008);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2018);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa018);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030c);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_5, 0x0000);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_4, 0x1001);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa098);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0xa198);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030d);
> + ndelay(150);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030f);
> +}
> +
> +/* PMA common configuration for 27MHz */
> +static void hdptx_dp_phy_pma_cmn_cfg_27mhz(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 num_lanes = cdns_phy->dp.lanes;
> + u16 val;
> + int k;
> +
> + /* Enable PMA input ref clk(CMN_REF_CLK_RCV_EN) */
> + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> + val &= ~CMA_REF_CLK_RCV_EN_MASK;
> + val |= FIELD_PREP(CMA_REF_CLK_RCV_EN_MASK, CMA_REF_CLK_RCV_EN);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> +
> + /* Startup state machine registers */
> + cdns_phy_reg_write(cdns_phy, CMN_SSM_BIAS_TMR, 0x0087);
> + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLEN_TMR, 0x001b);
> + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLPRE_TMR, 0x0036);
> + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLVREF_TMR, 0x001b);
> + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_PLLLOCK_TMR, 0x006c);
> +
> + /* Current calibration registers */
> + cdns_phy_reg_write(cdns_phy, CMN_ICAL_INIT_TMR, 0x0044);
> + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ITER_TMR, 0x0006);
> + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ADJ_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_ICAL_ADJ_ITER_TMR, 0x0006);
> +
> + /* Resistor calibration registers */
> + cdns_phy_reg_write(cdns_phy, CMN_TXPUCAL_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPUCAL_ITER_TMR, 0x0006);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPU_ADJ_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPU_ADJ_ITER_TMR, 0x0006);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPDCAL_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPDCAL_ITER_TMR, 0x0006);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPD_ADJ_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_TXPD_ADJ_ITER_TMR, 0x0006);
> + cdns_phy_reg_write(cdns_phy, CMN_RXCAL_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_RXCAL_ITER_TMR, 0x0006);
> + cdns_phy_reg_write(cdns_phy, CMN_RX_ADJ_INIT_TMR, 0x0022);
> + cdns_phy_reg_write(cdns_phy, CMN_RX_ADJ_ITER_TMR, 0x0006);
> +
> + for (k = 0; k < num_lanes; k = k + 1) {
> + /* Power state machine registers */
> + cdns_phy_reg_write(cdns_phy, XCVR_PSM_CAL_TMR | (k << 9), 0x016d);
> + cdns_phy_reg_write(cdns_phy, XCVR_PSM_A0IN_TMR | (k << 9), 0x016d);
> + /* Transceiver control and diagnostic registers */
> + cdns_phy_reg_write(cdns_phy, XCVR_DIAG_LANE_FCM_EN_MGN_TMR | (k << 9), 0x00a2);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_BGREF_PREDRV_DELAY | (k << 9), 0x0097);
> + /* Transmitter receiver detect registers */
> + cdns_phy_reg_write(cdns_phy, TX_RCVDET_EN_TMR | (k << 9), 0x0a8c);
> + cdns_phy_reg_write(cdns_phy, TX_RCVDET_ST_TMR | (k << 9), 0x0036);
> + }
> +
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_0, 1);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_1, 1);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_2, 1);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_3, 1);
> +}
> +
> +static void hdptx_dp_phy_pma_cmn_pll0_27mhz(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 num_lanes = cdns_phy->dp.lanes;
> + u32 link_rate = cdns_phy->dp.link_rate;
> + u16 val;
> + int index, i, k;
> +
> + /* DP PLL data rate 0/1 clock divider value */
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> + val &= ~PLL_DATA_RATE_CLK_DIV_MASK;
> + if (link_rate <= RATE_2_7)
> + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK,
> + PLL_DATA_RATE_CLK_DIV_HBR);
> + else
> + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK,
> + PLL_DATA_RATE_CLK_DIV_HBR2);
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> +
> + /* High speed clock 0/1 div */
> + val = cdns_phy_reg_read(cdns_phy, CMN_DIAG_HSCLK_SEL);
> + val &= ~(HSCLK1_SEL_MASK | HSCLK0_SEL_MASK);
> + if (link_rate <= RATE_2_7) {
> + val |= FIELD_PREP(HSCLK1_SEL_MASK, HSCLK_PLL0_DIV2);
> + val |= FIELD_PREP(HSCLK0_SEL_MASK, HSCLK_PLL0_DIV2);
> + }
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_HSCLK_SEL, val);
> +
> + for (k = 0; k < num_lanes; k++) {
> + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9)));
> + val &= ~HSCLK_SEL_MODE3_MASK;
> + if (link_rate <= RATE_2_7)
> + val |= FIELD_PREP(HSCLK_SEL_MODE3_MASK, HSCLK_SEL_MODE3_HSCLK1);
> + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9)), val);
> + }
> +
> + /* DP PHY PLL 27MHz configuration */
> + index = dp_link_rate_index(link_rate);
> + for (i = 0; i < ARRAY_SIZE(phy_pll_27m_cfg); i++)
> + cdns_phy_reg_write(cdns_phy, 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(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)));
> + val &= ~(DPLL_DATA_RATE_DIV_MODE3_MASK | DPLL_CLK_SEL_MODE3);
> + if (link_rate <= RATE_2_7)
> + val |= FIELD_PREP(DPLL_DATA_RATE_DIV_MODE3_MASK, 2);
> + else
> + val |= FIELD_PREP(DPLL_DATA_RATE_DIV_MODE3_MASK, 1);
> + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)), val);
> + }
> +
> + for (k = 0; k < num_lanes; k = k + 1) {
> + /* Power state machine registers */
> + cdns_phy_reg_write(cdns_phy, (XCVR_PSM_RCTRL | (k << 9)), 0xbefc);
> + cdns_phy_reg_write(cdns_phy, (TX_PSC_A0 | (k << 9)), 0x6799);
> + cdns_phy_reg_write(cdns_phy, (TX_PSC_A1 | (k << 9)), 0x6798);
> + cdns_phy_reg_write(cdns_phy, (TX_PSC_A2 | (k << 9)), 0x0098);
> + cdns_phy_reg_write(cdns_phy, (TX_PSC_A3 | (k << 9)), 0x0098);
> + /* Receiver calibration power state definition register */
> + val = cdns_phy_reg_read(cdns_phy, RX_PSC_CAL | (k << 9));
> + val &= 0xffbb;
> + cdns_phy_reg_write(cdns_phy, (RX_PSC_CAL | (k << 9)), val);
> + val = cdns_phy_reg_read(cdns_phy, RX_PSC_A0 | (k << 9));
> + val &= 0xffbb;
> + cdns_phy_reg_write(cdns_phy, (RX_PSC_A0 | (k << 9)), val);
> + }
> +}
> +
> +static void hdptx_dp_phy_ref_clock_type(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 val;
> +
> + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> + val &= ~CMA_REF_CLK_SEL_MASK;
> + /*
> + * single ended reference clock (val |= 0x0030);
> + * differential clock (val |= 0x0000);
> + *
> + * for differential clock on the refclk_p and
> + * refclk_m off chip pins: CMN_DIAG_ACYA[8]=1'b1
> + * cdns_phy_reg_write(cdns_phy, CMN_DIAG_ACYA, 0x0100);
> + */
> + val |= FIELD_PREP(CMA_REF_CLK_SEL_MASK, 3);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> +}
> +
> +static int wait_for_ack(struct cdns_hdptx_phy *cdns_phy, u32 reg, u32 mask,
> + const char *err_msg)
> +{
> + u32 val, i;
> +
> + for (i = 0; i < 10; i++) {
> + val = cdns_phy_reg_read(cdns_phy, reg);
> + if (val & mask)
> + return 0;
> + msleep(20);
> + }
Please use <linux/iopoll.h>
> +
> + dev_err(cdns_phy->dev, "%s\n", err_msg);
> + return -ETIMEDOUT;
> +}
> +
> +static int wait_for_ack_clear(struct cdns_hdptx_phy *cdns_phy, u32 reg, u32 mask,
> + const char *err_msg)
> +{
> + u32 val, i;
> +
> + for (i = 0; i < 10; i++) {
> + val = cdns_phy_reg_read(cdns_phy, reg);
> + if (!(val & mask))
> + return 0;
> + msleep(20);
> + }
> +
> + dev_err(cdns_phy->dev, "%s\n", err_msg);
> + return -ETIMEDOUT;
> +}
> +
> +static int hdptx_dp_phy_power_up(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 val;
> + int ret;
> +
> + /* Enable HDP PLL's for high speed clocks */
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> + val |= PLL_EN;
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> + ret = wait_for_ack(cdns_phy, PHY_HDP_CLK_CTL, PLL_READY,
> + "Wait PLL Ack failed");
> + if (ret < 0)
> + return ret;
> +
> + /* Enable HDP PLL's data rate and full rate clocks out of PMA. */
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> + val |= PLL_CLK_EN;
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> + ret = wait_for_ack(cdns_phy, PHY_HDP_CLK_CTL, PLL_CLK_EN_ACK,
> + "Wait PLL clock enable ACK failed");
> + if (ret < 0)
> + return ret;
> +
> + /* Configure PHY in A2 Mode */
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2);
> + ret = wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2_ACK,
> + "Wait A2 Ack failed");
> + if (ret < 0)
> + return ret;
> +
> + /* Configure PHY in A0 mode (PHY must be in the A0 power
> + * state in order to transmit data)
> + */
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0);
> + ret = wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0_ACK,
> + "Wait A0 Ack failed");
> + if (ret < 0)
> + return ret;
> +
> + cdns_phy->power_up = true;
> +
> + return ret;
> +}
> +
> +static int hdptx_dp_phy_power_down(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u16 val;
> + int ret;
> +
> + if (!cdns_phy->power_up)
> + return 0;
> +
> + /* Place the PHY lanes in the A3 power state. */
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3);
> + ret = wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3_ACK,
> + "Wait A3 Ack failed");
> + if (ret)
> + return ret;
> +
> + /* Disable HDP PLL's data rate and full rate clocks out of PMA. */
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> + val &= ~PLL_CLK_EN;
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> + ret = wait_for_ack_clear(cdns_phy, PHY_HDP_CLK_CTL, PLL_CLK_EN_ACK,
> + "Wait PLL clock Ack clear failed");
> + if (ret)
> + return ret;
> +
> + /* Disable HDP PLL's for high speed clocks */
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> + val &= ~PLL_EN;
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> + ret = wait_for_ack_clear(cdns_phy, PHY_HDP_CLK_CTL, PLL_READY,
> + "Wait PLL Ack clear failed");
> + if (ret)
> + return ret;
> +
> + cdns_phy->power_up = false;
> + return 0;
> +}
> +
> +static int cdns_hdptx_dp_configure(struct phy *phy,
> + union phy_configure_opts *opts)
> +{
> + struct cdns_hdptx_phy *cdns_phy = phy_get_drvdata(phy);
> +
> + cdns_phy->dp.link_rate = opts->dp.link_rate;
> + cdns_phy->dp.lanes = opts->dp.lanes;
Shouldn't this be conditional on set_rate / set_lanes ?
> +
> + if (cdns_phy->dp.link_rate > MAX_LINK_RATE) {
> + dev_err(cdns_phy->dev, "Link Rate(%d) Not supported\n", cdns_phy->dp.link_rate);
> + return false;
> + }
> +
> + /* Disable phy clock if PHY in power up state */
> + hdptx_dp_phy_power_down(cdns_phy);
Check if it is in the powered up state?
> +
> + if (cdns_phy->ref_clk_rate == REF_CLK_27MHZ) {
> + hdptx_dp_phy_pma_cmn_cfg_27mhz(cdns_phy);
> + hdptx_dp_phy_pma_cmn_pll0_27mhz(cdns_phy);
> + } else {
> + dev_err(cdns_phy->dev, "Not support ref clock rate\n");
> + }
> +
> + /* PHY power up */
> + return hdptx_dp_phy_power_up(cdns_phy);
> +}
> +
> +static bool hdptx_phy_check_alive(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 alive, newalive;
> + u8 retries_left = 50;
> +
> + alive = readl(cdns_phy->regs + KEEP_ALIVE);
> +
> + while (retries_left--) {
> + udelay(2);
> +
> + newalive = readl(cdns_phy->regs + KEEP_ALIVE);
linux/iopoll.h
> + if (alive == newalive)
> + continue;
> + return true;
> + }
> + return false;
> +}
> +
> +static int hdptx_clk_enable(struct cdns_hdptx_phy *cdns_phy)
> +{
> + struct device *dev = cdns_phy->dev;
> + u32 ref_clk_rate;
> + int ret;
> +
> + cdns_phy->ref_clk = devm_clk_get(dev, "ref");
devm_clk_get_enabled().
> + if (IS_ERR(cdns_phy->ref_clk)) {
> + dev_err(dev, "phy ref clock not found\n");
> + return PTR_ERR(cdns_phy->ref_clk);
> + }
> +
> + cdns_phy->apb_clk = devm_clk_get(dev, "apb");
> + if (IS_ERR(cdns_phy->apb_clk)) {
> + dev_err(dev, "phy apb clock not found\n");
> + return PTR_ERR(cdns_phy->apb_clk);
> + }
> +
> + ret = clk_prepare_enable(cdns_phy->ref_clk);
> + if (ret) {
> + dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
> + return ret;
> + }
> +
> + ref_clk_rate = clk_get_rate(cdns_phy->ref_clk);
> + if (!ref_clk_rate) {
> + dev_err(cdns_phy->dev, "Failed to get ref clock rate\n");
> + goto err_ref_clk;
> + }
> +
> + if (ref_clk_rate == REF_CLK_27MHZ) {
> + cdns_phy->ref_clk_rate = ref_clk_rate;
> + } else {
> + dev_err(cdns_phy->dev, "Not support Ref Clock Rate(%dHz)\n", ref_clk_rate);
> + goto err_ref_clk;
> + }
> +
> + ret = clk_prepare_enable(cdns_phy->apb_clk);
> + if (ret) {
> + dev_err(cdns_phy->dev, "Failed to prepare apb clock\n");
> + goto err_ref_clk;
> + }
> +
> + return 0;
> +
> +err_ref_clk:
> + clk_disable_unprepare(cdns_phy->ref_clk);
> + return -EINVAL;
> +}
> +
> +static void hdptx_clk_disable(struct cdns_hdptx_phy *cdns_phy)
> +{
> + clk_disable_unprepare(cdns_phy->apb_clk);
> + clk_disable_unprepare(cdns_phy->ref_clk);
> +}
> +
> +static void hdptx_hdmi_arc_config(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u16 txpu_calib_code;
> + u16 txpd_calib_code;
> + u16 txpu_adj_calib_code;
> + u16 txpd_adj_calib_code;
> + u16 prev_calib_code;
> + u16 new_calib_code;
> + u16 rdata;
> +
> + /* Power ARC */
> + cdns_phy_reg_write(cdns_phy, TXDA_CYA_AUXDA_CYA, 0x0001);
> +
> + prev_calib_code = cdns_phy_reg_read(cdns_phy, TX_DIG_CTRL_REG_2);
> + txpu_calib_code = cdns_phy_reg_read(cdns_phy, CMN_TXPUCAL_CTRL);
> + txpd_calib_code = cdns_phy_reg_read(cdns_phy, CMN_TXPDCAL_CTRL);
> + txpu_adj_calib_code = cdns_phy_reg_read(cdns_phy, CMN_TXPU_ADJ_CTRL);
> + txpd_adj_calib_code = cdns_phy_reg_read(cdns_phy, CMN_TXPD_ADJ_CTRL);
> +
> + new_calib_code = ((txpu_calib_code + txpd_calib_code) / 2)
> + + txpu_adj_calib_code + txpd_adj_calib_code;
> +
> + if (new_calib_code != prev_calib_code) {
> + rdata = cdns_phy_reg_read(cdns_phy, TX_ANA_CTRL_REG_1);
> + rdata &= 0xdfff;
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, rdata);
> + cdns_phy_reg_write(cdns_phy, TX_DIG_CTRL_REG_2, new_calib_code);
> + mdelay(10);
> + rdata |= 0x2000;
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, rdata);
> + usleep_range(150, 250);
> + }
> +
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0100);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0300);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_3, 0x0000);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2008);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2018);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2098);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030c);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_5, 0x0010);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_4, 0x4001);
> + mdelay(5);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2198);
> + mdelay(5);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030d);
> + usleep_range(100, 200);
> + cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030f);
> +}
> +
> +static void hdptx_hdmi_phy_set_vswing(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 k;
> + const u32 num_lanes = 4;
> +
> + for (k = 0; k < num_lanes; k++) {
> + cdns_phy_reg_write(cdns_phy, (TX_DIAG_TX_DRV | (k << 9)),
> + TX_DRIVER_PROG_BOOST_ENABLE |
> + FIELD_PREP(TX_DRIVER_PROG_BOOST_LEVEL_MASK, 3) |
> + TX_DRIVER_LDO_BG_DEPENDENT_REF_ENABLE |
> + TX_DRIVER_LDO_BANDGAP_REF_ENABLE);
> + cdns_phy_reg_write(cdns_phy, (TX_TXCC_CPOST_MULT_00_0 | (k << 9)), 0x0);
> + cdns_phy_reg_write(cdns_phy, (TX_TXCC_CAL_SCLR_MULT_0 | (k << 9)),
> + SCALED_RESISTOR_CALIBRATION_CODE_ADD |
> + RESISTOR_CAL_MULT_VAL_32_128);
> + }
> +}
> +
> +static int hdptx_hdmi_phy_config(struct cdns_hdptx_phy *cdns_phy,
> + const struct hdptx_hdmi_ctrl *p_ctrl_table,
> + const struct hdptx_hdmi_pll_tuning *p_pll_table,
> + bool pclk_in)
> +{
> + const u32 num_lanes = 4;
> + u32 val, k;
> + int ret;
> +
> + /* enable PHY isolation mode only for CMN */
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISOLATION_CTRL, 0xd000);
> +
> + /* set cmn_pll0_clk_datart1_div/cmn_pll0_clk_datart0_div dividers */
> + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_ISO_PLL_CTRL1);
> + val &= ~CMN_PLL0_CLK_DATART_DIV_MASK;
> + val |= FIELD_PREP(CMN_PLL0_CLK_DATART_DIV_MASK, 0x12);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_PLL_CTRL1, val);
> +
> + /* assert PHY reset from isolation register */
> + cdns_phy_reg_write(cdns_phy, PHY_ISO_CMN_CTRL, 0x0000);
> + /* assert PMA CMN reset */
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_CMN_CTRL, 0x0000);
> +
> + /* register XCVR_DIAG_BIDI_CTRL */
> + for (k = 0; k < num_lanes; k++)
> + cdns_phy_reg_write(cdns_phy, XCVR_DIAG_BIDI_CTRL | (k << 9), 0x00ff);
> +
> + /* Describing Task phy_cfg_hdp */
> + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> + val &= ~CMA_REF_CLK_RCV_EN_MASK;
> + val |= FIELD_PREP(CMA_REF_CLK_RCV_EN_MASK, CMA_REF_CLK_RCV_EN);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> +
> + /* PHY Registers */
> + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> + val &= ~CMA_REF_CLK_DIG_DIV_MASK;
> + val |= FIELD_PREP(CMA_REF_CLK_DIG_DIV_MASK, p_ctrl_table->cmn_ref_clk_dig_div);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> +
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> + val &= ~PLL_DATA_RATE_CLK_DIV_MASK;
> + val |= FIELD_PREP(PLL_DATA_RATE_CLK_DIV_MASK,
> + PLL_DATA_RATE_CLK_DIV_HBR2);
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_CLK_CTL, val);
> +
> + /* Common control module control and diagnostic registers */
> + val = cdns_phy_reg_read(cdns_phy, CMN_CDIAG_REFCLK_CTRL);
> + val &= ~DIG_REF_CLK_DIV_SCALER_MASK;
> + val |= FIELD_PREP(DIG_REF_CLK_DIV_SCALER_MASK, p_ctrl_table->ref_clk_divider_scaler);
> + val |= REFCLK_TERMINATION_EN_OVERRIDE_EN | REFCLK_TERMINATION_EN_OVERRIDE;
> + cdns_phy_reg_write(cdns_phy, CMN_CDIAG_REFCLK_CTRL, val);
> +
> + /* High speed clock used */
> + val = cdns_phy_reg_read(cdns_phy, CMN_DIAG_HSCLK_SEL);
> + val &= ~(HSCLK1_SEL_MASK | HSCLK0_SEL_MASK);
> + val |= FIELD_PREP(HSCLK1_SEL_MASK, (p_ctrl_table->cmnda_hs_clk_1_sel >> 1));
> + val |= FIELD_PREP(HSCLK0_SEL_MASK, (p_ctrl_table->cmnda_hs_clk_0_sel >> 1));
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_HSCLK_SEL, val);
> +
> + for (k = 0; k < num_lanes; k++) {
> + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9)));
> + val &= ~HSCLK_SEL_MODE3_MASK;
> + val |= FIELD_PREP(HSCLK_SEL_MODE3_MASK,
> + (p_ctrl_table->cmnda_hs_clk_0_sel >> 1));
> + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_HSCLK_SEL | (k << 9)), val);
> + }
> +
> + /* PLL 0 control state machine registers */
> + val = p_ctrl_table->vco_ring_select << 12;
> + cdns_phy_reg_write(cdns_phy, CMN_PLLSM0_USER_DEF_CTRL, val);
> +
> + if (pclk_in) {
> + val = 0x30a0;
> + } else {
> + val = cdns_phy_reg_read(cdns_phy, CMN_PLL0_VCOCAL_START);
> + val &= ~VCO_CALIB_CODE_START_POINT_VAL_MASK;
> + val |= FIELD_PREP(VCO_CALIB_CODE_START_POINT_VAL_MASK,
> + p_pll_table->vco_cal_code);
> + }
> + cdns_phy_reg_write(cdns_phy, CMN_PLL0_VCOCAL_START, val);
> +
> + cdns_phy_reg_write(cdns_phy, CMN_PLL0_VCOCAL_INIT_TMR, 0x0064);
> + cdns_phy_reg_write(cdns_phy, CMN_PLL0_VCOCAL_ITER_TMR, 0x000a);
> +
> + /* Common functions control and diagnostics registers */
> + val = p_ctrl_table->cmnda_pll0_hs_sym_div_sel << 8;
> + val |= p_ctrl_table->cmnda_pll0_ip_div;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_INCLK_CTRL, val);
> +
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_OVRD, 0x0000);
> +
> + val = p_ctrl_table->cmnda_pll0_fb_div_high;
> + val |= PLL_FEEDBACK_DIV_HI_OVERRIDE_EN;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_FBH_OVRD, val);
> +
> + val = p_ctrl_table->cmnda_pll0_fb_div_low;
> + val |= PLL_FEEDBACK_DIV_LO_OVERRIDE_EN;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_FBL_OVRD, val);
> +
> + if (!pclk_in) {
> + val = p_ctrl_table->cmnda_pll0_pxdiv_low;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_PXL_DIVL, val);
> +
> + val = p_ctrl_table->cmnda_pll0_pxdiv_high;
> + val |= PLL_PCLK_DIV_EN;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_PXL_DIVH, val);
> + }
> +
> + val = p_pll_table->volt_to_current_coarse;
> + val |= (p_pll_table->volt_to_current) << 4;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_V2I_TUNE, val);
> +
> + val = p_pll_table->charge_pump_gain;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_CP_TUNE, val);
> +
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_LF_PROG, 0x0008);
> +
> + val = p_pll_table->pmos_ctrl;
> + val |= (p_pll_table->ndac_ctrl) << 8;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_PTATIS_TUNE1, val);
> +
> + val = p_pll_table->ptat_ndac_ctrl;
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_PTATIS_TUNE2, val);
> +
> + if (pclk_in)
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_TEST_MODE, 0x0022);
> + else
> + cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_TEST_MODE, 0x0020);
> +
> + cdns_phy_reg_write(cdns_phy, CMN_PSM_CLK_CTRL, 0x0016);
> +
> + /* Transceiver control and diagnostic registers */
> + for (k = 0; k < num_lanes; k++) {
> + val = cdns_phy_reg_read(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)));
> + val &= ~DPLL_CLK_SEL_MODE3;
> + cdns_phy_reg_write(cdns_phy, (XCVR_DIAG_PLLDRC_CTRL | (k << 9)), val);
> + }
> +
> + for (k = 0; k < num_lanes; k++) {
> + val = cdns_phy_reg_read(cdns_phy, (TX_DIAG_TX_CTRL | (k << 9)));
> + val &= ~TX_IF_SUBRATE_MODE3_MASK;
> + val |= FIELD_PREP(TX_IF_SUBRATE_MODE3_MASK,
> + (p_ctrl_table->hsclk_div_tx_sub_rate >> 1));
> + cdns_phy_reg_write(cdns_phy, (TX_DIAG_TX_CTRL | (k << 9)), val);
> + }
> +
> + val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> + val &= ~CMA_REF_CLK_SEL_MASK;
> + /*
> + * single ended reference clock (val |= 0x0030);
> + * differential clock (val |= 0x0000);
> + * for differential clock on the refclk_p and
> + * refclk_m off chip pins: CMN_DIAG_ACYA[8]=1'b1
> + * cdns_phy_reg_write(cdns_phy, CMN_DIAG_ACYA, 0x0100);
> + */
> + val |= FIELD_PREP(CMA_REF_CLK_SEL_MASK, 3);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> +
> + /* Deassert PHY reset */
> + cdns_phy_reg_write(cdns_phy, PHY_ISO_CMN_CTRL, 0x0001);
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_CMN_CTRL, 0x0003);
> +
> + /* Power state machine registers */
> + for (k = 0; k < num_lanes; k++)
> + cdns_phy_reg_write(cdns_phy, XCVR_PSM_RCTRL | (k << 9), 0xfefc);
> +
> + /* Assert cmn_macro_pwr_en */
> + cdns_phy_reg_write(cdns_phy, PHY_PMA_ISO_CMN_CTRL, 0x0013);
> +
> + /* wait for cmn_macro_pwr_en_ack */
> + ret = wait_for_ack(cdns_phy, PHY_PMA_ISO_CMN_CTRL, CMN_MACRO_PWR_EN_ACK,
> + "MA output macro power up failed");
> + if (ret < 0)
> + return ret;
> +
> + /* wait for cmn_ready */
> + ret = wait_for_ack(cdns_phy, PHY_PMA_CMN_CTRL1, CMN_READY,
> + "PMA output ready failed");
> + if (ret < 0)
> + return ret;
> +
> + for (k = 0; k < num_lanes; k++) {
> + cdns_phy_reg_write(cdns_phy, TX_PSC_A0 | (k << 9), 0x6791);
> + cdns_phy_reg_write(cdns_phy, TX_PSC_A1 | (k << 9), 0x6790);
> + cdns_phy_reg_write(cdns_phy, TX_PSC_A2 | (k << 9), 0x0090);
> + cdns_phy_reg_write(cdns_phy, TX_PSC_A3 | (k << 9), 0x0090);
> +
> + val = cdns_phy_reg_read(cdns_phy, RX_PSC_CAL | (k << 9));
> + val &= 0xffbb;
> + cdns_phy_reg_write(cdns_phy, RX_PSC_CAL | (k << 9), val);
> +
> + val = cdns_phy_reg_read(cdns_phy, RX_PSC_A0 | (k << 9));
> + val &= 0xffbb;
> + cdns_phy_reg_write(cdns_phy, RX_PSC_A0 | (k << 9), val);
> + }
> +
> + return 0;
> +}
> +
> +static int hdptx_hdmi_phy_cfg(struct cdns_hdptx_phy *cdns_phy, unsigned long long char_rate)
> +{
> + const struct hdptx_hdmi_ctrl *p_ctrl_table;
> + const struct hdptx_hdmi_pll_tuning *p_pll_table;
> + const u32 refclk_freq_khz = cdns_phy->ref_clk_rate / 1000;
> + const bool pclk_in = false;
> + u32 char_rate_khz = char_rate / 1000;
> + u32 vco_freq, rate;
> + u32 div_total, i;
> +
> + dev_dbg(cdns_phy->dev, "character clock: %d KHz\n ", char_rate_khz);
> +
> + /* Get right row from the ctrl_table table.
> + * check the character rate.
> + */
> + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_ctrl_table); i++) {
> + rate = pixel_clk_output_ctrl_table[i].feedback_factor *
> + pixel_clk_output_ctrl_table[i].pixel_clk_freq_min / 1000;
> + if (char_rate_khz == rate) {
> + p_ctrl_table = &pixel_clk_output_ctrl_table[i];
> + break;
> + }
> + }
> + if (i == ARRAY_SIZE(pixel_clk_output_ctrl_table)) {
> + dev_warn(cdns_phy->dev,
> + "char clk (%d KHz) not supported\n", char_rate_khz);
> + return -EINVAL;
> + }
> +
> + div_total = p_ctrl_table->pll_fb_div_total;
> + vco_freq = refclk_freq_khz * div_total / p_ctrl_table->cmnda_pll0_ip_div;
> +
> + /* Get right row from the pixel_clk_output_pll_table table.
> + * Check if vco_freq_khz and feedback_div_total
> + * column matching with pixel_clk_output_pll_table.
> + */
> + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_pll_table); i++) {
> + if (vco_freq == pixel_clk_output_pll_table[i].vco_freq_min &&
> + div_total == pixel_clk_output_pll_table[i].feedback_div_total) {
> + p_pll_table = &pixel_clk_output_pll_table[i];
> + break;
> + }
> + }
> + if (i == ARRAY_SIZE(pixel_clk_output_pll_table)) {
> + dev_warn(cdns_phy->dev, "VCO (%d KHz) not supported\n", vco_freq);
> + return -EINVAL;
> + }
> + dev_dbg(cdns_phy->dev, "VCO frequency is (%d KHz)\n", vco_freq);
> +
> + return hdptx_hdmi_phy_config(cdns_phy, p_ctrl_table, p_pll_table, pclk_in);
> +}
> +
> +static int hdptx_hdmi_phy_power_up(struct cdns_hdptx_phy *cdns_phy)
> +{
> + int ret;
> +
> + /* set Power State to A2 */
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2);
> +
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_0, 1);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_1, 1);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_2, 1);
> + cdns_phy_reg_write(cdns_phy, TX_DIAG_ACYA_3, 1);
> +
> + ret = wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A2_ACK,
> + "Wait A2 Ack failed");
> + if (ret < 0)
> + return ret;
> +
> + /* Power up ARC */
> + hdptx_hdmi_arc_config(cdns_phy);
> +
> + /* Configure PHY in A0 mode (PHY must be in the A0 power
> + * state in order to transmit data)
> + */
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0);
> +
> + return wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A0_ACK,
> + "Wait A0 Ack failed");
> +}
> +
> +static int hdptx_hdmi_phy_power_down(struct cdns_hdptx_phy *cdns_phy)
> +{
> + u32 val;
> +
> + val = cdns_phy_reg_read(cdns_phy, PHY_HDP_MODE_CTRL);
> + val &= ~(POWER_STATE_A0 | POWER_STATE_A1 | POWER_STATE_A2 | POWER_STATE_A3);
> + /* PHY_DP_MODE_CTL set to A3 power state */
> + cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, val | POWER_STATE_A3);
> +
> + return wait_for_ack(cdns_phy, PHY_HDP_MODE_CTRL, POWER_STATE_A3_ACK,
> + "Wait A3 Ack failed");
> +}
> +
> +static int cdns_hdptx_phy_on(struct phy *phy)
> +{
> + struct cdns_hdptx_phy *cdns_phy = phy_get_drvdata(phy);
> +
> + if (phy->attrs.mode == PHY_MODE_DP)
> + return hdptx_dp_phy_power_up(cdns_phy);
> + else
> + return hdptx_hdmi_phy_power_up(cdns_phy);
> +}
> +
> +static int cdns_hdptx_phy_off(struct phy *phy)
> +{
> + struct cdns_hdptx_phy *cdns_phy = phy_get_drvdata(phy);
> +
> + if (phy->attrs.mode == PHY_MODE_DP)
> + return hdptx_dp_phy_power_down(cdns_phy);
> + else
> + return hdptx_hdmi_phy_power_down(cdns_phy);
> + return 0;
> +}
> +
> +static int
> +cdns_hdptx_phy_valid(struct phy *phy, enum phy_mode mode,
> + int submode, union phy_configure_opts *opts)
> +{
> + u32 rate = opts->hdmi.tmds_char_rate / 1000;
> + int i;
> +
> + if (mode == PHY_MODE_DP)
> + return 0;
> +
> + for (i = 0; i < ARRAY_SIZE(pixel_clk_output_ctrl_table); i++)
> + if (rate == pixel_clk_output_ctrl_table[i].pixel_clk_freq_min)
> + return 0;
> +
> + return -EINVAL;
> +}
> +
> +static int cdns_hdptx_phy_init(struct phy *phy)
> +{
> + return 0;
> +}
Unnecessary, please drop.
> +
> +static int cdns_hdptx_phy_set_mode(struct phy *phy, enum phy_mode mode, int submode)
> +{
> + struct cdns_hdptx_phy *cdns_phy = phy_get_drvdata(phy);
> + int ret = 0;
> +
> + if (mode == PHY_MODE_DP) {
> + hdptx_dp_phy_ref_clock_type(cdns_phy);
> +
> + /* PHY power up */
> + ret = hdptx_dp_phy_power_up(cdns_phy);
> + if (ret < 0)
> + return ret;
> +
> + hdptx_dp_aux_cfg(cdns_phy);
Why? Don't power up the PHY if you haven't been told to.
> + } else if (mode != PHY_MODE_HDMI) {
> + dev_err(&phy->dev, "Invalid PHY mode: %u\n", mode);
> + return -EINVAL;
> + }
> +
> + return ret;
> +}
> +
> +static int cdns_hdptx_hdmi_configure(struct phy *phy,
> + union phy_configure_opts *opts)
> +{
> + struct cdns_hdptx_phy *cdns_phy = phy_get_drvdata(phy);
> + int ret;
> +
> + cdns_phy->hdmi.tmds_char_rate = opts->hdmi.tmds_char_rate;
> +
> + /* Check HDMI FW alive before HDMI PHY init */
> + ret = hdptx_phy_check_alive(cdns_phy);
> + if (!ret) {
> + dev_err(cdns_phy->dev, "NO HDMI FW running\n");
> + return -ENXIO;
> + }
> +
> + /* Configure PHY */
> + if (hdptx_hdmi_phy_cfg(cdns_phy, cdns_phy->hdmi.tmds_char_rate) < 0) {
> + dev_err(cdns_phy->dev, "failed to set phy pclock\n");
> + return -EINVAL;
> + }
> +
> + ret = hdptx_hdmi_phy_power_up(cdns_phy);
it seems to be all over the place :-(
> + if (ret < 0)
> + return ret;
> +
> + hdptx_hdmi_phy_set_vswing(cdns_phy);
> +
> + return 0;
> +}
> +
> +static int cdns_hdptx_configure(struct phy *phy,
> + union phy_configure_opts *opts)
> +{
> + if (phy->attrs.mode == PHY_MODE_DP)
> + return cdns_hdptx_dp_configure(phy, opts);
> + else
> + return cdns_hdptx_hdmi_configure(phy, opts);
> +}
> +
> +static const struct phy_ops cdns_hdptx_phy_ops = {
> + .init = cdns_hdptx_phy_init,
> + .set_mode = cdns_hdptx_phy_set_mode,
> + .configure = cdns_hdptx_configure,
> + .power_on = cdns_hdptx_phy_on,
> + .power_off = cdns_hdptx_phy_off,
> + .validate = cdns_hdptx_phy_valid,
> + .owner = THIS_MODULE,
> +};
> +
> +static int cdns_hdptx_phy_probe(struct platform_device *pdev)
> +{
> + struct cdns_hdptx_phy *cdns_phy;
> + struct device *dev = &pdev->dev;
> + struct device_node *node = dev->of_node;
> + struct phy_provider *phy_provider;
> + struct resource *res;
> + struct phy *phy;
> + int ret;
> +
> + cdns_phy = devm_kzalloc(dev, sizeof(*cdns_phy), GFP_KERNEL);
> + if (!cdns_phy)
> + return -ENOMEM;
> +
> + dev_set_drvdata(dev, cdns_phy);
> + cdns_phy->dev = dev;
> +
> + res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + if (!res)
> + return -ENODEV;
> + cdns_phy->regs = devm_ioremap(dev, res->start, resource_size(res));
> + if (IS_ERR(cdns_phy->regs))
> + return PTR_ERR(cdns_phy->regs);
> +
> + phy = devm_phy_create(dev, node, &cdns_hdptx_phy_ops);
> + if (IS_ERR(phy))
> + return PTR_ERR(phy);
> +
> + cdns_phy->phy = phy;
> + phy_set_drvdata(phy, cdns_phy);
> +
> + /* init base struct for access mhdp mailbox */
> + cdns_phy->base.dev = cdns_phy->dev;
> + cdns_phy->base.regs = cdns_phy->regs;
> +
> + ret = hdptx_clk_enable(cdns_phy);
> + if (ret) {
> + dev_err(dev, "Init clk fail\n");
> + return -EINVAL;
> + }
> +
> + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> + if (IS_ERR(phy_provider)) {
> + ret = PTR_ERR(phy_provider);
> + goto clk_disable;
> + }
> +
> + dev_dbg(dev, "probe success!\n");
Drop
> +
> + return 0;
> +
> +clk_disable:
> + hdptx_clk_disable(cdns_phy);
> +
> + return -EINVAL;
> +}
> +
> +static void cdns_hdptx_phy_remove(struct platform_device *pdev)
> +{
> + struct cdns_hdptx_phy *cdns_phy = platform_get_drvdata(pdev);
> +
> + hdptx_clk_disable(cdns_phy);
> +}
> +
> +static const struct of_device_id cdns_hdptx_phy_of_match[] = {
> + {.compatible = "fsl,imx8mq-hdptx-phy" },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, cdns_hdptx_phy_of_match);
> +
> +static struct platform_driver cdns_hdptx_phy_driver = {
> + .probe = cdns_hdptx_phy_probe,
> + .remove = cdns_hdptx_phy_remove,
> + .driver = {
> + .name = "cdns-hdptx-phy",
> + .of_match_table = cdns_hdptx_phy_of_match,
> + }
> +};
> +module_platform_driver(cdns_hdptx_phy_driver);
> +
> +MODULE_AUTHOR("Sandor Yu <sandor.yu@xxxxxxx>");
> +MODULE_DESCRIPTION("Cadence HDP-TX DP/HDMI PHY driver");
> +MODULE_LICENSE("GPL");
> --
> 2.34.1
>
--
With best wishes
Dmitry
