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Date:   Wed, 21 Jun 2023 17:27:32 +0530
From:   Vinod Koul <vkoul@kernel.org>
To:     Sandor Yu <Sandor.yu@nxp.com>
Cc:     andrzej.hajda@intel.com, neil.armstrong@linaro.org,
        robert.foss@linaro.org, Laurent.pinchart@ideasonboard.com,
        jonas@kwiboo.se, jernej.skrabec@gmail.com, airlied@gmail.com,
        daniel@ffwll.ch, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, shawnguo@kernel.org,
        s.hauer@pengutronix.de, festevam@gmail.com,
        dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org,
        linux-phy@lists.infradead.org, kernel@pengutronix.de,
        linux-imx@nxp.com, oliver.brown@nxp.com
Subject: Re: [PATCH v6 8/8] phy: freescale: Add HDMI PHY driver for i.MX8MQ
Message-ID: <ZJLlrNhTl19JNUTy@matsya>
References: <cover.1686729444.git.Sandor.yu@nxp.com>
 <80581808d007fbd91358a258eae078f08659442f.1686729444.git.Sandor.yu@nxp.com>
MIME-Version: 1.0
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In-Reply-To: <80581808d007fbd91358a258eae078f08659442f.1686729444.git.Sandor.yu@nxp.com>
Precedence: bulk

On 15-06-23, 09:38, Sandor Yu wrote:
> Add Cadence HDP-TX 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.
> HDMI PHY mode is configurated in the driver.
> 
> Signed-off-by: Sandor Yu <Sandor.yu@nxp.com>
> ---
>  drivers/phy/freescale/Kconfig               |   9 +
>  drivers/phy/freescale/Makefile              |   1 +
>  drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c | 889 ++++++++++++++++++++
>  3 files changed, 899 insertions(+)
>  create mode 100644 drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> 
> diff --git a/drivers/phy/freescale/Kconfig b/drivers/phy/freescale/Kconfig
> index a99ee370eda6..e007e15e503a 100644
> --- a/drivers/phy/freescale/Kconfig
> +++ b/drivers/phy/freescale/Kconfig
> @@ -44,6 +44,15 @@ config PHY_CADENCE_DP_PHY
>  	  Enable this to support the Cadence HDPTX DP PHY driver
>  	  on NXP's i.MX8MQ SOC.
>  
> +config PHY_CADENCE_HDMI_PHY
> +	tristate "Cadence HDPTX HDMI PHY Driver"
> +	depends on OF && HAS_IOMEM
> +	depends on COMMON_CLK
> +	select GENERIC_PHY
> +	help
> +	  Enable this to support the Cadence HDPTX HDMI PHY driver.
> +	  on NXP's i.MX8MQ SOC.
> +
>  endif
>  
>  config PHY_FSL_LYNX_28G
> diff --git a/drivers/phy/freescale/Makefile b/drivers/phy/freescale/Makefile
> index c3bdf3fa2e72..d25fafd91c53 100644
> --- a/drivers/phy/freescale/Makefile
> +++ b/drivers/phy/freescale/Makefile
> @@ -5,3 +5,4 @@ obj-$(CONFIG_PHY_MIXEL_MIPI_DPHY)	+= phy-fsl-imx8-mipi-dphy.o
>  obj-$(CONFIG_PHY_FSL_IMX8M_PCIE)	+= phy-fsl-imx8m-pcie.o
>  obj-$(CONFIG_PHY_FSL_LYNX_28G)		+= phy-fsl-lynx-28g.o
>  obj-$(CONFIG_PHY_CADENCE_DP_PHY)	+= phy-fsl-imx8mq-dp.o
> +obj-$(CONFIG_PHY_CADENCE_HDMI_PHY)	+= phy-fsl-imx8mq-hdmi.o

Pls sort alphabetically (both Kconfig and Makefile)


> diff --git a/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c b/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> new file mode 100644
> index 000000000000..65aeb9835bb9
> --- /dev/null
> +++ b/drivers/phy/freescale/phy-fsl-imx8mq-hdmi.c
> @@ -0,0 +1,889 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * Cadence High-Definition Multimedia Interface (HDMI) PHY driver
> + *
> + * Copyright (C) 2022 NXP Semiconductor, Inc.
> + */
> +#include <asm/unaligned.h>
> +#include <linux/clk.h>
> +#include <linux/kernel.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/io.h>
> +
> +#include <drm/bridge/cdns-mhdp-mailbox.h>
> +
> +#define ADDR_PHY_AFE	0x80000
> +/* PHY registers */
> +#define CMN_SSM_BIAS_TMR                0x0022
> +#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_TXPUCAL_CTRL                0x00E0
> +#define CMN_TXPDCAL_CTRL                0x00F0
> +#define CMN_TXPU_ADJ_CTRL               0x0108
> +#define CMN_TXPD_ADJ_CTRL               0x010c
> +#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 XCVR_PSM_RCTRL                  0x4001
> +#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_PLLDRC_CTRL           0x40E0
> +#define XCVR_DIAG_HSCLK_SEL             0x40E1
> +#define XCVR_DIAG_BIDI_CTRL             0x40E8
> +#define TX_PSC_A0                       0x4100
> +#define TX_PSC_A1                       0x4101
> +#define TX_PSC_A2                       0x4102
> +#define TX_PSC_A3                       0x4103
> +#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_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
> +
> +#define REF_CLK_27MHZ		27000000

This looks similar to patch 7, how different are these two..?

> +
> +/* 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_hdmi_phy {
> +	void __iomem *regs;	/* DPTX registers base */
> +	struct mutex mbox_mutex; /* mutex to protect mailbox */
> +	struct device *dev;
> +	struct phy *phy;
> +	struct clk *ref_clk, *apb_clk;
> +	u32 ref_clk_rate;
> +	u32 pixel_clk_rate;
> +	enum hdmi_phy_colorspace color_space;
> +	u32 bpc;
> +};
> +
> +/* 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},
> +};
> +
> +/* 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 },
> +};
> +
> +static int cdns_phy_reg_write(struct cdns_hdptx_hdmi_phy *cdns_phy, u32 addr, u32 val)
> +{
> +	return cdns_mhdp_reg_write(cdns_phy, ADDR_PHY_AFE + (addr << 2), val);
> +}
> +
> +static u32 cdns_phy_reg_read(struct cdns_hdptx_hdmi_phy *cdns_phy, u32 addr)
> +{
> +	u32 reg32;
> +
> +	cdns_mhdp_reg_read(cdns_phy, ADDR_PHY_AFE + (addr << 2), &reg32);
> +
> +	return reg32;
> +}
> +
> +#define KEEP_ALIVE			0x18
> +static bool hdptx_phy_check_alive(struct cdns_hdptx_hdmi_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);
> +		if (alive == newalive)
> +			continue;
> +		return true;
> +	}
> +	return false;
> +}
> +
> +static int hdptx_hdmi_clk_enable(struct cdns_hdptx_hdmi_phy *cdns_phy)
> +{
> +	struct device *dev = cdns_phy->dev;
> +	u32 ref_clk_rate;
> +	int ret;
> +
> +	cdns_phy->ref_clk = devm_clk_get(dev, "ref");
> +	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);

not _put for ref_clk?

> +	}
> +
> +	ret = clk_prepare_enable(cdns_phy->ref_clk);
> +	if (ret) {
> +		dev_err(cdns_phy->dev, "Failed to prepare ref clock\n");
> +		return ret;

what happens to clk refs you have already taken?

> +	}
> +
> +	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_hdmi_clk_disable(struct cdns_hdptx_hdmi_phy *cdns_phy)
> +{
> +	clk_disable_unprepare(cdns_phy->ref_clk);
> +	clk_disable_unprepare(cdns_phy->apb_clk);
> +}
> +
> +static void hdptx_hdmi_arc_config(struct cdns_hdptx_hdmi_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);
> +		udelay(150);
> +	}
> +
> +	cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0100);
> +	udelay(100);
> +	cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x0300);
> +	udelay(100);
> +	cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_3, 0x0000);
> +	udelay(100);
> +	cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2008);
> +	udelay(100);
> +	cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_1, 0x2018);
> +	udelay(100);
> +	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);
> +	udelay(100);
> +	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);
> +	udelay(100);
> +	cdns_phy_reg_write(cdns_phy, TX_ANA_CTRL_REG_2, 0x030F);
> +}
> +
> +static void hdptx_hdmi_phy_set_vswing(struct cdns_hdptx_hdmi_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)), 0x7c0);
> +		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)), 0x120);

magic numbers?

> +	}
> +}
> +
> +static int hdptx_hdmi_feedback_factor(struct cdns_hdptx_hdmi_phy *cdns_phy)
> +{
> +	u32 feedback_factor;
> +
> +	switch (cdns_phy->color_space) {
> +	case HDMI_PHY_COLORSPACE_YUV422:
> +		feedback_factor = 1000;
> +		break;

empty line after each case please

> +	case HDMI_PHY_COLORSPACE_YUV420:
> +		switch (cdns_phy->bpc) {
> +		case 8:
> +			feedback_factor = 500;
> +			break;
> +		case 10:
> +			feedback_factor = 625;
> +			break;
> +		case 12:
> +			feedback_factor = 750;
> +			break;
> +		case 16:
> +			feedback_factor = 1000;
> +			break;
> +		default:
> +			dev_dbg(cdns_phy->dev, "Invalid ColorDepth\n");
> +			return 0;
> +		}
> +		break;
> +	default:
> +		/* Assume RGB/YUV444 */
> +		switch (cdns_phy->bpc) {
> +		case 10:
> +			feedback_factor = 1250;
> +			break;
> +		case 12:
> +			feedback_factor = 1500;
> +			break;
> +		case 16:
> +			feedback_factor = 2000;
> +			break;
> +		default:
> +			feedback_factor = 1000;
> +		}
> +	}
> +
> +	return feedback_factor;
> +}
> +
> +static int hdptx_hdmi_phy_config(struct cdns_hdptx_hdmi_phy *cdns_phy,
> +								const struct hdptx_hdmi_ctrl *p_ctrl_table,
> +								const struct hdptx_hdmi_pll_tuning *p_pll_table,
> +								char pclk_in)

this looks bad, please run checkpatch --strict to align these properly

> +{
> +	const u32 num_lanes = 4;
> +	u32 val, i, k;
> +
> +	/* 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 &= 0xFF00;

lowercase hex values everywhere pls

> +	val |= 0x0012;
> +	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 &= 0xFFF7;
> +	val |= 0x0008;
> +	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 &= 0xCFFF;
> +	val |= p_ctrl_table->cmn_ref_clk_dig_div << 12;
> +	cdns_phy_reg_write(cdns_phy, PHY_PMA_CMN_CTRL1, val);
> +
> +	val = cdns_phy_reg_read(cdns_phy, PHY_HDP_CLK_CTL);
> +	val &= 0x00FF;
> +	val |= 0x1200;
> +	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 &= 0x8FFF;
> +	val |= p_ctrl_table->ref_clk_divider_scaler << 12;
> +	val |= 0x00C0;
> +	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 &= 0xFF00;
> +	val |= (p_ctrl_table->cmnda_hs_clk_0_sel >> 1) << 0;
> +	val |= (p_ctrl_table->cmnda_hs_clk_1_sel >> 1) << 4;
> +	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 &= 0xCFFF;
> +		val |= (p_ctrl_table->cmnda_hs_clk_0_sel >> 1) << 12;
> +		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 == true)
> +		val = 0x30A0;
> +	else {
> +		val = cdns_phy_reg_read(cdns_phy, CMN_PLL0_VCOCAL_START);
> +		val &= 0xFE00;
> +		val |= 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 |= (1 << 15);
> +	cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_FBH_OVRD, val);
> +
> +	val = p_ctrl_table->cmnda_pll0_fb_div_low;
> +	val |= (1 << 15);
> +	cdns_phy_reg_write(cdns_phy, CMN_DIAG_PLL0_FBL_OVRD, val);
> +
> +	if (pclk_in == false) {
> +		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 |= (1 << 15);
> +		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 == true)
> +		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 &= 0xBFFF;
> +		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 &= 0xFF3F;
> +		val |= (p_ctrl_table->hsclk_div_tx_sub_rate >> 1) << 6;
> +		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 &= 0xFF8F;
> +	/*
> +	 * 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 |= 0x0030;
> +	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 */
> +	for (i = 0; i < 10; i++) {
> +		val = cdns_phy_reg_read(cdns_phy, PHY_PMA_ISO_CMN_CTRL);
> +		if (val & (1 << 5))
> +			break;
> +		msleep(20);
> +	}
> +	if (i == 10) {
> +		dev_err(cdns_phy->dev, "PMA output macro power up failed\n");
> +		return -1;
> +	}
> +
> +	/* wait for cmn_ready */
> +	for (i = 0; i < 10; i++) {
> +		val = cdns_phy_reg_read(cdns_phy, PHY_PMA_CMN_CTRL1);
> +		if (val & (1 << 0))
> +			break;
> +		msleep(20);
> +	}
> +	if (i == 10) {
> +		dev_err(cdns_phy->dev, "PMA output ready failed\n");
> +		return -1;
> +	}
> +
> +	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_hdmi_phy *cdns_phy, u32 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 u8 pclk_in = false;
> +	u32 pixel_freq = rate;
> +	u32 vco_freq, char_freq;
> +	u32 div_total, feedback_factor;
> +	u32 i, ret;
> +
> +	feedback_factor = hdptx_hdmi_feedback_factor(cdns_phy);
> +
> +	char_freq = pixel_freq * feedback_factor / 1000;
> +
> +	dev_dbg(cdns_phy->dev, "Pixel clock: (%d KHz), character clock: %d, bpc is (%0d-bit)\n",
> +			pixel_freq, char_freq, cdns_phy->bpc);
> +
> +	/* Get right row from the ctrl_table table.
> +	 * Check if 'pixel_freq_khz' value matches the PIXEL_CLK_FREQ column.
> +	 * Consider only the rows with FEEDBACK_FACTOR column matching feedback_factor.
> +	 */
> +	for (i = 0; i < ARRAY_SIZE(pixel_clk_output_ctrl_table); i++) {
> +		if (feedback_factor == pixel_clk_output_ctrl_table[i].feedback_factor &&
> +			pixel_freq == pixel_clk_output_ctrl_table[i].pixel_clk_freq_min) {
> +			p_ctrl_table = &pixel_clk_output_ctrl_table[i];
> +			break;
> +		}
> +	}
> +	if (i == ARRAY_SIZE(pixel_clk_output_ctrl_table)) {
> +		dev_warn(cdns_phy->dev, "Pixel clk (%d KHz) not supported, bpc is (%0d-bit)\n",
> +				pixel_freq, cdns_phy->bpc);
> +		return 0;
> +	}
> +
> +	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 -1;
> +	}
> +	dev_dbg(cdns_phy->dev, "VCO frequency is (%d KHz)\n", vco_freq);
> +
> +	ret = hdptx_hdmi_phy_config(cdns_phy, p_ctrl_table, p_pll_table, pclk_in);
> +	if (ret < 0)
> +		return ret;
> +
> +	return char_freq;
> +}
> +
> +static int hdptx_hdmi_phy_power_up(struct cdns_hdptx_hdmi_phy *cdns_phy)
> +{
> +	u32 val, i;
> +
> +	/* set Power State to A2 */
> +	cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, 0x0004);
> +
> +	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);
> +
> +	/* Wait for Power State A2 Ack */
> +	for (i = 0; i < 10; i++) {
> +		val = cdns_phy_reg_read(cdns_phy, PHY_HDP_MODE_CTRL);
> +		if (val & (1 << 6))
> +			break;
> +		msleep(20);
> +	}
> +	if (i == 10) {
> +		dev_err(cdns_phy->dev, "Wait A2 Ack failed\n");
> +		return -1;
> +	}
> +
> +	/* 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, 0x0001);
> +
> +	/* Wait for Power State A0 Ack */
> +	for (i = 0; i < 10; i++) {
> +		val = cdns_phy_reg_read(cdns_phy, PHY_HDP_MODE_CTRL);
> +		if (val & (1 << 4))
> +			break;
> +		msleep(20);
> +	}
> +	if (i == 10) {
> +		dev_err(cdns_phy->dev, "Wait A0 Ack failed\n");
> +		return -1;
> +	}
> +	return 0;
> +}
> +
> +static int hdptx_hdmi_phy_power_down(struct cdns_hdptx_hdmi_phy *cdns_phy)
> +{
> +	int timeout;
> +	u32 reg_val;
> +
> +	reg_val = cdns_phy_reg_read(cdns_phy, PHY_HDP_MODE_CTRL);
> +	reg_val &= 0xfff0;
> +	/* PHY_DP_MODE_CTL set to A3 power state*/
> +	cdns_phy_reg_write(cdns_phy, PHY_HDP_MODE_CTRL, reg_val | 0x8);
> +
> +	/* Wait for A3 acknowledge */
> +	timeout = 0;
> +	do {
> +		reg_val = cdns_phy_reg_read(cdns_phy, PHY_HDP_MODE_CTRL);
> +		dev_dbg(cdns_phy->dev, "Reg val is 0x%04x\n", reg_val);
> +		timeout++;
> +		msleep(100);
> +	} while (!(reg_val & (0x8 << 4)) && (timeout < 10));
> +
> +	return 0;
> +}
> +
> +static int cdns_hdptx_hdmi_phy_on(struct phy *phy)
> +{
> +	struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> +
> +	return hdptx_hdmi_phy_power_up(cdns_phy);
> +}
> +
> +static int cdns_hdptx_hdmi_phy_off(struct phy *phy)
> +{
> +	struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> +
> +	hdptx_hdmi_phy_power_down(cdns_phy);
> +	return 0;
> +}
> +
> +int	cdns_hdptx_hdmi_phy_valid(struct phy *phy, enum phy_mode mode, int submode,
> +							union phy_configure_opts *opts)
> +{
> +	u32 rate = opts->hdmi.pixel_clk_rate;
> +	int i;
> +
> +	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_hdmi_phy_init(struct phy *phy)
> +{
> +	return 0;
> +}
> +
> +static int cdns_hdptx_hdmi_configure(struct phy *phy,
> +				     union phy_configure_opts *opts)
> +{
> +	struct cdns_hdptx_hdmi_phy *cdns_phy = phy_get_drvdata(phy);
> +	int ret;
> +
> +	cdns_phy->pixel_clk_rate = opts->hdmi.pixel_clk_rate;
> +	cdns_phy->color_space = opts->hdmi.color_space;
> +	cdns_phy->bpc = opts->hdmi.bpc;
> +
> +	/* Check HDMI FW alive before HDMI PHY init */
> +	ret = hdptx_phy_check_alive(cdns_phy);
> +	if (ret == false) {
> +		dev_err(cdns_phy->dev, "NO HDMI FW running\n");
> +		return -ENXIO;
> +	}
> +
> +	/* Configure PHY */
> +	if (hdptx_hdmi_phy_cfg(cdns_phy, cdns_phy->pixel_clk_rate) < 0) {
> +		dev_err(cdns_phy->dev, "failed to set phy pclock\n");
> +		return -EINVAL;
> +	}
> +
> +	ret = hdptx_hdmi_phy_power_up(cdns_phy);
> +	if (ret < 0)
> +		return ret;
> +
> +	hdptx_hdmi_phy_set_vswing(cdns_phy);
> +
> +	return 0;
> +}
> +
> +static const struct phy_ops cdns_hdptx_hdmi_phy_ops = {
> +	.init		= cdns_hdptx_hdmi_phy_init,
> +	.configure	= cdns_hdptx_hdmi_configure,
> +	.power_on	= cdns_hdptx_hdmi_phy_on,
> +	.power_off	= cdns_hdptx_hdmi_phy_off,
> +	.validate   = cdns_hdptx_hdmi_phy_valid,
> +	.owner		= THIS_MODULE,
> +};
> +
> +static int cdns_hdptx_hdmi_phy_probe(struct platform_device *pdev)
> +{
> +	struct cdns_hdptx_hdmi_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;
> +	mutex_init(&cdns_phy->mbox_mutex);
> +
> +	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_hdmi_phy_ops);
> +	if (IS_ERR(phy))
> +		return PTR_ERR(phy);
> +
> +	phy->attrs.mode = PHY_MODE_HDMI;
> +
> +	cdns_phy->phy = phy;
> +	phy_set_drvdata(phy, cdns_phy);
> +
> +	ret = hdptx_hdmi_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");
> +
> +	return 0;
> +
> +clk_disable:
> +	hdptx_hdmi_clk_disable(cdns_phy);
> +
> +	return -EINVAL;
> +}
> +
> +static int cdns_hdptx_hdmi_phy_remove(struct platform_device *pdev)
> +{
> +	struct cdns_hdptx_hdmi_phy *cdns_phy = platform_get_drvdata(pdev);
> +
> +	hdptx_hdmi_clk_disable(cdns_phy);
> +
> +	return 0;
> +}
> +
> +static const struct of_device_id cdns_hdptx_hdmi_phy_of_match[] = {
> +	{.compatible = "fsl,imx8mq-hdmi-phy" },
> +	{ /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, cdns_hdptx_hdmi_phy_of_match);
> +
> +static struct platform_driver cdns_hdptx_hdmi_phy_driver = {
> +	.probe	= cdns_hdptx_hdmi_phy_probe,
> +	.remove = cdns_hdptx_hdmi_phy_remove,
> +	.driver = {
> +		.name	= "cdns-hdptx-hdmi-phy",
> +		.of_match_table	= cdns_hdptx_hdmi_phy_of_match,
> +	}
> +};
> +module_platform_driver(cdns_hdptx_hdmi_phy_driver);
> +
> +MODULE_AUTHOR("Sandor Yu <sandor.yu@nxp.com>");
> +MODULE_DESCRIPTION("Cadence HDP-TX HDMI PHY driver");
> +MODULE_LICENSE("GPL");
> -- 
> 2.34.1

-- 
~Vinod