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Message-ID: <e2c12b2210403d483f607c79b45f32c512e4f394.camel@mediatek.com>
Subject: Re: [PATCH v2 10/12] phy: mediatek: add support for
 phy-mtk-hdmi-mt8195
From:   Chunfeng Yun <chunfeng.yun@mediatek.com>
To:     Guillaume Ranquet <granquet@baylibre.com>,
        David Airlie <airlied@gmail.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Jitao shi <jitao.shi@mediatek.com>, CK Hu <ck.hu@mediatek.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Vinod Koul <vkoul@kernel.org>,
        "Kishon Vijay Abraham I" <kishon@ti.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>
CC:     <stuart.lee@mediatek.com>, <linux-phy@lists.infradead.org>,
        <devicetree@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        <linux-kernel@vger.kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        <mac.shen@mediatek.com>, <linux-mediatek@lists.infradead.org>,
        <dri-devel@lists.freedesktop.org>
Date:   Fri, 21 Oct 2022 15:44:16 +0800
In-Reply-To: <20220919-v2-10-8419dcf4f09d@baylibre.com>
References: <20220919-v2-0-8419dcf4f09d@baylibre.com>
         <20220919-v2-10-8419dcf4f09d@baylibre.com>
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On Fri, 2022-10-14 at 17:16 +0200, Guillaume Ranquet wrote:
> Add basic support for the mediatek hdmi phy on MT8195 SoC
> 
> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
> ---
>  drivers/phy/mediatek/Makefile              |   1 +
>  drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 546
> +++++++++++++++++++++++++++++
>  drivers/phy/mediatek/phy-mtk-hdmi-mt8195.h | 131 +++++++
>  drivers/phy/mediatek/phy-mtk-hdmi.c        |   3 +
>  drivers/phy/mediatek/phy-mtk-hdmi.h        |   1 +
>  5 files changed, 682 insertions(+)
> 
> diff --git a/drivers/phy/mediatek/Makefile
> b/drivers/phy/mediatek/Makefile
> index fb1f8edaffa7..c9a50395533e 100644
> --- a/drivers/phy/mediatek/Makefile
> +++ b/drivers/phy/mediatek/Makefile
> @@ -12,6 +12,7 @@ obj-$(CONFIG_PHY_MTK_XSPHY)		+= phy-mtk-
> xsphy.o
>  phy-mtk-hdmi-drv-y			:= phy-mtk-hdmi.o
>  phy-mtk-hdmi-drv-y			+= phy-mtk-hdmi-mt2701.o
>  phy-mtk-hdmi-drv-y			+= phy-mtk-hdmi-mt8173.o
> +phy-mtk-hdmi-drv-y			+= phy-mtk-hdmi-mt8195.o
>  obj-$(CONFIG_PHY_MTK_HDMI)		+= phy-mtk-hdmi-drv.o
>  
>  phy-mtk-mipi-dsi-drv-y			:= phy-mtk-mipi-dsi.o
> diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
> b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
> new file mode 100644
> index 000000000000..6433e002cfdc
> --- /dev/null
> +++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
> @@ -0,0 +1,546 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2021 MediaTek Inc.
> + * Copyright (c) 2021 BayLibre, SAS
2022?

> + */
> +#include <linux/delay.h>
> +#include <linux/io.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/types.h>
> +#include <linux/nvmem-consumer.h>
> +
> +#include "phy-mtk-io.h"
> +#include "phy-mtk-hdmi.h"
> +#include "phy-mtk-hdmi-mt8195.h"
> +
> +static void mtk_hdmi_ana_fifo_en(struct mtk_hdmi_phy *hdmi_phy)
> +{
> +	/* make data fifo writable for hdmi2.0 */
> +	mtk_phy_set_bits(hdmi_phy->regs + HDMI_ANA_CTL,
> REG_ANA_HDMI20_FIFO_EN);
> +}
> +
> +static void
> +mtk_mt8195_phy_tmds_high_bit_clk_ratio(struct mtk_hdmi_phy
> *hdmi_phy,
> +				       bool enable)
> +{
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	mtk_hdmi_ana_fifo_en(hdmi_phy);
> +
> +	/* HDMI 2.0 specification, 3.4Gbps <= TMDS Bit Rate <= 6G,
> +	 * clock bit ratio 1:40, under 3.4Gbps, clock bit ratio 1:10
> +	 */
> +	if (enable)
> +		mtk_phy_update_field(regs + HDMI20_CLK_CFG,
> REG_TXC_DIV, REG_TXC_DIV);
> +	else
> +		mtk_phy_clear_bits(regs + HDMI20_CLK_CFG, REG_TXC_DIV);
> +}
> +
> +static void mtk_hdmi_pll_select_source(struct clk_hw *hw)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	mtk_phy_clear_bits(regs + HDMI_CTL_3, REG_HDMITX_REF_XTAL_SEL);
> +	mtk_phy_clear_bits(regs + HDMI_CTL_3,
> REG_HDMITX_REF_RESPLL_SEL);
> +
> +	/* DA_HDMITX21_REF_CK for TXPLL input source */
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_10,
> RG_HDMITXPLL_REF_CK_SEL);
> +}
> +
> +static int mtk_hdmi_pll_performance_setting(struct clk_hw *hw)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	/* BP2 */
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_0, RG_HDMITXPLL_BP2);
> +
> +	/* BC */
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_BC);
> +
> +	/* IC */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_IC,
> 0x1);
> +
> +	/* BR */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_BR,
> 0x2);
> +
> +	/* IR */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_IR,
> 0x2);
> +
> +	/* BP */
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_BP);
> +
> +	/* IBAND_FIX_EN, RESERVE[14] */
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_0,
> RG_HDMITXPLL_IBAND_FIX_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_1,
> RG_HDMITXPLL_RESERVE_BIT14);
> +
> +	/* HIKVCO */
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_2,
> RG_HDMITXPLL_HIKVCO);
> +
> +	/* HREN */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_0,
> RG_HDMITXPLL_HREN, 0x1);
> +
> +	/* LVR_SEL */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_0,
> RG_HDMITXPLL_LVR_SEL, 0x1);
> +
> +	/* RG_HDMITXPLL_RESERVE[12:11] */
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_1,
> RG_HDMITXPLL_RESERVE_BIT12_11);
> +
> +	/* TCL_EN */
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_0, RG_HDMITXPLL_TCL_EN);
> +
> +	return 0;
> +}
> +
> +static int mtk_hdmi_pll_set_hw(struct clk_hw *hw, unsigned char
> prediv,
> +			       unsigned char fbkdiv_high,
> +			       unsigned long fbkdiv_low,
> +			       unsigned char fbkdiv_hs3, unsigned char
> posdiv1,
> +			       unsigned char posdiv2, unsigned char
> txprediv,
> +			       unsigned char txposdiv,
> +			       unsigned char digital_div)
> +{
> +	unsigned char txposdiv_value = 0;
> +	unsigned char div3_ctrl_value = 0;
> +	unsigned char posdiv_vallue = 0;
> +	unsigned char div_ctrl_value = 0;
> +	unsigned char reserve_3_2_value = 0;
> +	unsigned char prediv_value = 0;
> +	unsigned char reserve13_value = 0;
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	mtk_hdmi_pll_select_source(hw);
> +
> +	mtk_hdmi_pll_performance_setting(hw);
> +
> +	mtk_phy_update_field(regs + HDMI_1_CFG_10,
> RG_HDMITX21_BIAS_PE_BG_VREF_SEL, 0x2);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_10, RG_HDMITX21_VREF_SEL);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_9,
> RG_HDMITX21_SLDO_VREF_SEL, 0x2);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_10,
> RG_HDMITX21_BIAS_PE_VREF_SELB);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_3, RG_HDMITX21_SLDOLPF_EN);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_6, RG_HDMITX21_INTR_CAL,
> 0x11);
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_PWD);
> +
> +	/* TXPOSDIV */
> +	txposdiv_value = ilog2(txposdiv);
> +
> +	mtk_phy_update_field(regs + HDMI_1_CFG_6,
> RG_HDMITX21_TX_POSDIV, txposdiv_value);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6,
> RG_HDMITX21_TX_POSDIV_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_FRL_EN);
> +
> +	/* TXPREDIV */
> +	switch (txprediv) {
> +		case 2:
'case' is aligned with 'switch'

> +			div3_ctrl_value = 0x0;
> +			posdiv_vallue = 0x0;
> +			break;
> +		case 4:
> +			div3_ctrl_value = 0x0;
> +			posdiv_vallue = 0x1;
> +			break;
> +		case 6:
> +			div3_ctrl_value = 0x1;
> +			posdiv_vallue = 0x0;
> +			break;
> +		case 12:
> +			div3_ctrl_value = 0x1;
> +			posdiv_vallue = 0x1;
> +			break;
> +		default:
> +			return -EINVAL;
> +	}
> +
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_4,
> RG_HDMITXPLL_POSDIV_DIV3_CTRL, div3_ctrl_value);
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_4,
> RG_HDMITXPLL_POSDIV, posdiv_vallue );
> +
> +	/* POSDIV1 */
> +	switch (posdiv1) {
> +		case 5:
> +			div_ctrl_value = 0x0;
> +			break;
> +		case 10:
> +			div_ctrl_value = 0x1;
> +			break;
> +		case 12:
> +			div_ctrl_value = 0x2;
> +			break;
> +		case 15:
> +			div_ctrl_value = 0x3;
> +			break;
> +		default:
> +			return -EINVAL;
> +	}
> +
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_4,
> RG_HDMITXPLL_DIV_CTRL, div_ctrl_value);
> +
> +	/* DE add new setting */
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_1,
> RG_HDMITXPLL_RESERVE_BIT14);
> +
> +	/* POSDIV2 */
> +	switch (posdiv2) {
> +		case 1:
> +			reserve_3_2_value = 0x0;
> +			break;
> +		case 2:
> +			reserve_3_2_value = 0x1;
> +			break;
> +		case 4:
> +			reserve_3_2_value = 0x2;
> +			break;
> +		case 6:
> +			reserve_3_2_value = 0x3;
> +			break;
> +		default:
> +			return -EINVAL;
> +	}
> +
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_1,
> RG_HDMITXPLL_RESERVE_BIT3_2, reserve_3_2_value);
> +
> +	/* DE add new setting */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_1,
> RG_HDMITXPLL_RESERVE_BIT1_0, 0x2);
> +
> +	/* PREDIV */
> +	prediv_value = ilog2(prediv);
> +
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_4,
> RG_HDMITXPLL_PREDIV, prediv_value);
> +
> +	/* FBKDIV_HS3 */
> +	reserve13_value = ilog2(fbkdiv_hs3);
> +
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_1,
> RG_HDMITXPLL_RESERVE_BIT13, reserve13_value);
> +
> +	/* FBDIV */
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_4,
> RG_HDMITXPLL_FBKDIV_HIGH, fbkdiv_high);
> +	mtk_phy_update_field(regs + HDMI_1_PLL_CFG_3,
> RG_HDMITXPLL_FBKDIV_LOW, fbkdiv_low);
> +
> +
> +	/* Digital DIVIDER */
> +	mtk_phy_clear_bits(regs + HDMI_CTL_3, REG_PIXEL_CLOCK_SEL);
> +
> +	if (digital_div == 1) {
> +		mtk_phy_clear_bits(regs + HDMI_CTL_3,
> REG_HDMITX_PIXEL_CLOCK);
> +	} else {
> +		mtk_phy_set_bits(regs + HDMI_CTL_3,
> REG_HDMITX_PIXEL_CLOCK);
> +		mtk_phy_update_field(regs + HDMI_CTL_3,
> REG_HDMITXPLL_DIV, digital_div - 1);
> +	}
> +
> +	return 0;
> +}
> +
> +#define PCW_DECIMAL_WIDTH 24
> +
> +static int mtk_hdmi_pll_calculate_params(struct clk_hw *hw, unsigned
> long rate,
> +					 unsigned long parent_rate)
> +{
> +	int ret;
> +	unsigned long long tmds_clk = 0;
> +	unsigned long long pixel_clk = 0;
> +	//pll input source frequency
prefer to use '/* */' instead '//'

> +	unsigned long long da_hdmitx21_ref_ck = 0;
> +	unsigned long long ns_hdmipll_ck = 0; //ICO output clk
> +	//source clk for Display digital
> +	unsigned long long ad_hdmipll_pixel_ck = 0;
> +	unsigned char digital_div = 0;
> +	unsigned long long pcw = 0; //FBDIV
> +	unsigned char txprediv = 0;
> +	unsigned char txposdiv = 0;
> +	unsigned char fbkdiv_high = 0;
> +	unsigned long fbkdiv_low = 0;
> +	unsigned char posdiv1 = 0;
> +	unsigned char posdiv2 = 0;
> +	unsigned char prediv = 1; //prediv is always 1
> +	unsigned char fbkdiv_hs3 = 1; //fbkdiv_hs3 is always 1
> +	int i = 0;
> +	unsigned char txpredivs[4] = { 2, 4, 6, 12 };
> +
> +	pixel_clk = rate;
> +	tmds_clk = pixel_clk;
> +
> +	if (tmds_clk < 25000000 || tmds_clk > 594000000)
> +		return -EINVAL;
> +
> +	da_hdmitx21_ref_ck = 26000000UL; //in HZ
> +
> +	/*  TXPOSDIV stage treatment:
> +	 *	0M  <  TMDS clk  < 54M		  /8
> +	 *	54M <= TMDS clk  < 148.35M    /4
> +	 *	148.35M <=TMDS clk < 296.7M   /2
> +	 *	296.7 <=TMDS clk <= 594M	  /1
> +	 */
> +	if (tmds_clk < 54000000UL)
> +		txposdiv = 8;
> +	else if (tmds_clk >= 54000000UL && tmds_clk < 148350000UL)
> +		txposdiv = 4;
> +	else if (tmds_clk >= 148350000UL && tmds_clk < 296700000UL)
> +		txposdiv = 2;
> +	else if (tmds_clk >= 296700000UL && tmds_clk <= 594000000UL)
> +		txposdiv = 1;
> +	else
> +		return -EINVAL;
> +
> +	/* calculate txprediv: can be 2, 4, 6, 12
> +	 * ICO clk = 5*TMDS_CLK*TXPOSDIV*TXPREDIV
> +	 * ICO clk constraint: 5G =< ICO clk <= 12G
> +	 */
> +	for (i = 0; i < ARRAY_SIZE(txpredivs); i++) {
> +		ns_hdmipll_ck = 5 * tmds_clk * txposdiv * txpredivs[i];
> +		if (ns_hdmipll_ck >= 5000000000UL &&
> +		    ns_hdmipll_ck <= 12000000000UL)
> +			break;
> +	}
> +	if (i == (ARRAY_SIZE(txpredivs) - 1) &&
> +	    (ns_hdmipll_ck < 5000000000UL || ns_hdmipll_ck >
> 12000000000UL)) {
> +		return -EINVAL;
> +	}
> +	if (i == ARRAY_SIZE(txpredivs))
> +		return -EINVAL;
> +
> +	txprediv = txpredivs[i];
> +
> +	/* PCW calculation: FBKDIV
> +	 * formula: pcw=(frequency_out*2^pcw_bit) / frequency_in /
> FBKDIV_HS3;
> +	 * RG_HDMITXPLL_FBKDIV[32:0]:
> +	 * [32,24] 9bit integer, [23,0]:24bit fraction
> +	 */
> +	pcw = ns_hdmipll_ck;
> +	pcw = pcw << PCW_DECIMAL_WIDTH;
> +	pcw = pcw / da_hdmitx21_ref_ck;
> +	pcw = pcw / fbkdiv_hs3;
> +
> +	if ((pcw / BIT(32)) > 1) {
> +		return -EINVAL;
> +	} else if ((pcw / BIT(32)) == 1) {
> +		fbkdiv_high = 1;
> +		fbkdiv_low = pcw % BIT(32);
> +	} else {
> +		fbkdiv_high = 0;
> +		fbkdiv_low = pcw;
> +	}
> +
> +	/* posdiv1:
> +	 * posdiv1 stage treatment according to color_depth:
> +	 * 24bit -> posdiv1 /10, 30bit -> posdiv1 /12.5,
> +	 * 36bit -> posdiv1 /15, 48bit -> posdiv1 /10
> +	 */
> +	posdiv1 = 10; // div 10
> +	posdiv2 = 1;
> +	ad_hdmipll_pixel_ck = (ns_hdmipll_ck / 10) / 1;
> +
> +	/* Digital clk divider, max /32 */
> +	digital_div = ad_hdmipll_pixel_ck / pixel_clk;
> +	if (!(digital_div <= 32 && digital_div >= 1))
> +		return -EINVAL;
> +
> +	ret = mtk_hdmi_pll_set_hw(hw, prediv, fbkdiv_high, fbkdiv_low,
> +				  fbkdiv_hs3, posdiv1, posdiv2,
> txprediv,
> +				  txposdiv, digital_div);
> +	if (ret)
> +		return -EINVAL;
> +
> +	return 0;
> +}
> +
> +static int mtk_hdmi_pll_drv_setting(struct clk_hw *hw)
> +{
> +	unsigned char data_channel_bias, clk_channel_bias;
> +	unsigned char impedance, impedance_en;
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	unsigned long tmds_clk;
> +	unsigned long pixel_clk = hdmi_phy->pll_rate;
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	tmds_clk = pixel_clk;
> +
> +	/* bias & impedance setting:
> +	 * 3G < data rate <= 6G: enable impedance 100ohm,
> +	 *      data channel bias 24mA, clock channel bias 20mA
> +	 * pixel clk >= HD,  74.175MHZ <= pixel clk <= 300MHZ:
> +	 *      enalbe impedance 100ohm
> +	 *      data channel 20mA, clock channel 16mA
> +	 * 27M =< pixel clk < 74.175: disable impedance
> +	 *      data channel & clock channel bias 10mA
> +	 */
> +
> +	/* 3G < data rate <= 6G, 300M < tmds rate <= 594M */
> +	if (tmds_clk > 300000000UL && tmds_clk <= 594000000UL) {
> +		data_channel_bias = 0x3c; //24mA
> +		clk_channel_bias = 0x34; //20mA
> +		impedance_en = 0xf;
> +		impedance = 0x36; //100ohm
> +	} else if (pixel_clk >= 74175000UL && pixel_clk <= 300000000UL)
> {
> +		data_channel_bias = 0x34; //20mA
> +		clk_channel_bias = 0x2c; //16mA
> +		impedance_en = 0xf;
> +		impedance = 0x36; //100ohm
> +	} else if (pixel_clk >= 27000000UL && pixel_clk < 74175000UL) {
> +		data_channel_bias = 0x14; //10mA
> +		clk_channel_bias = 0x14; //10mA
> +		impedance_en = 0x0;
> +		impedance = 0x0;
> +	} else {
> +		return -EINVAL;
> +	}
> +
> +	/* bias */
> +	mtk_phy_update_field(regs + HDMI_1_CFG_1,
> RG_HDMITX21_DRV_IBIAS_D0, data_channel_bias);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_1,
> RG_HDMITX21_DRV_IBIAS_D1, data_channel_bias);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_1,
> RG_HDMITX21_DRV_IBIAS_D2, data_channel_bias);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_0,
> RG_HDMITX21_DRV_IBIAS_CLK, clk_channel_bias);
> +
> +	/* impedance */
> +	mtk_phy_update_field(regs + HDMI_1_CFG_0,
> RG_HDMITX21_DRV_IMP_EN, impedance_en);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_2,
> RG_HDMITX21_DRV_IMP_D0_EN1, impedance);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_2,
> RG_HDMITX21_DRV_IMP_D1_EN1, impedance);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_2,
> RG_HDMITX21_DRV_IMP_D2_EN1, impedance);
> +	mtk_phy_update_field(regs + HDMI_1_CFG_2,
> RG_HDMITX21_DRV_IMP_CLK_EN1, impedance);
> +
> +	return 0;
> +}
> +
> +static int mtk_hdmi_pll_prepare(struct clk_hw *hw)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6,
> RG_HDMITX21_TX_POSDIV_EN);
> +
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_0, RG_HDMITX21_SER_EN);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6,
> RG_HDMITX21_D0_DRV_OP_EN);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6,
> RG_HDMITX21_D1_DRV_OP_EN);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6,
> RG_HDMITX21_D2_DRV_OP_EN);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6,
> RG_HDMITX21_CK_DRV_OP_EN);
> +
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_FRL_D0_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_FRL_D1_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_FRL_D2_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_FRL_CK_EN);
> +
> +	mtk_hdmi_pll_drv_setting(hw);
> +
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_10, RG_HDMITX21_BG_PWD);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_BIAS_EN);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_3, RG_HDMITX21_CKLDO_EN);
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_3, RG_HDMITX21_SLDO_EN);
> +
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_4, DA_HDMITXPLL_PWR_ON);
> +	usleep_range(5, 10);
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_4,
> DA_HDMITXPLL_ISO_EN);
> +	usleep_range(5, 10);
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_PWD);
> +	usleep_range(30, 50);
> +	return 0;
> +}
> +
> +static void mtk_hdmi_pll_unprepare(struct clk_hw *hw)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	mtk_phy_set_bits(regs + HDMI_1_CFG_10, RG_HDMITX21_BG_PWD);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_6, RG_HDMITX21_BIAS_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_3, RG_HDMITX21_CKLDO_EN);
> +	mtk_phy_clear_bits(regs + HDMI_1_CFG_3, RG_HDMITX21_SLDO_EN);
> +
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_2, RG_HDMITXPLL_PWD);
> +	usleep_range(10, 20);
> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_4, DA_HDMITXPLL_ISO_EN);
> +	usleep_range(10, 20);
> +	mtk_phy_clear_bits(regs + HDMI_1_PLL_CFG_4,
> DA_HDMITXPLL_PWR_ON);
> +}
> +
> +static int mtk_hdmi_pll_set_rate(struct clk_hw *hw, unsigned long
> rate,
> +				 unsigned long parent_rate)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +	int ret;
> +
> +	dev_dbg(hdmi_phy->dev, "%s: %lu Hz, parent: %lu Hz\n",
> __func__, rate,
> +		parent_rate);
> +
> +	ret = mtk_hdmi_pll_calculate_params(hw, rate, parent_rate);
> +	if (ret != 0)
> +		return -EINVAL;
> +
> +	return 0;

return mtk_hdmi_pll_calculate_params(hw, rate, parent_rate);

> +}
> +
> +static long mtk_hdmi_pll_round_rate(struct clk_hw *hw, unsigned long
> rate,
> +				    unsigned long *parent_rate)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +
> +	hdmi_phy->pll_rate = rate;
> +	return rate;
> +}
> +
> +static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
> +					      unsigned long
> parent_rate)
> +{
> +	struct mtk_hdmi_phy *hdmi_phy = to_mtk_hdmi_phy(hw);
> +
> +	return hdmi_phy->pll_rate;
> +}
> +
> +static const struct clk_ops mtk_hdmi_pll_ops = {
> +	.prepare = mtk_hdmi_pll_prepare,
> +	.unprepare = mtk_hdmi_pll_unprepare,
> +	.set_rate = mtk_hdmi_pll_set_rate,
> +	.round_rate = mtk_hdmi_pll_round_rate,
> +	.recalc_rate = mtk_hdmi_pll_recalc_rate,
> +};
> +
> +static void vtx_signal_en(struct mtk_hdmi_phy *hdmi_phy, bool on)
> +{
> +	void __iomem *regs = hdmi_phy->regs;
> +
> +	if (on)
> +		mtk_phy_set_bits(regs + HDMI_1_CFG_0,
> RG_HDMITX21_DRV_EN);
> +	else
> +		mtk_phy_clear_bits(regs + HDMI_1_CFG_0,
> RG_HDMITX21_DRV_EN);
> +}
> +
> +static void mtk_hdmi_phy_enable_tmds(struct mtk_hdmi_phy *hdmi_phy)
> +{
> +	vtx_signal_en(hdmi_phy, true);
> +	usleep_range(100, 150);
> +}
> +
> +static void mtk_hdmi_phy_disable_tmds(struct mtk_hdmi_phy *hdmi_phy)
> +{
> +	vtx_signal_en(hdmi_phy, false);
> +}
> +
> +static int mtk_hdmi_phy_configure(struct phy *phy, union
> phy_configure_opts *opts)
> +{
> +	struct phy_configure_opts_dp *dp_opts = &opts->dp;
> +	struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(phy);
> +	int ret = 0;
> +	bool enable = 0;
Seems no need local variable "enable"
> +
> +	ret = clk_set_rate(hdmi_phy->pll, dp_opts->link_rate);
> +
> +	if (ret)
> +		goto out;
return ret directly?

> +
> +	mtk_mt8195_phy_tmds_high_bit_clk_ratio(hdmi_phy, enable);
> +
> +out:
> +	return ret;
> +}
> +
> +struct mtk_hdmi_phy_conf mtk_hdmi_phy_8195_conf = {
> +	.flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE,
> +	.hdmi_phy_clk_ops = &mtk_hdmi_pll_ops,
> +	.hdmi_phy_enable_tmds = mtk_hdmi_phy_enable_tmds,
> +	.hdmi_phy_disable_tmds = mtk_hdmi_phy_disable_tmds,
> +	.hdmi_phy_configure = mtk_hdmi_phy_configure,
> +};
> +
> +MODULE_AUTHOR("Can Zeng <can.zeng@mediatek.com>");
> +MODULE_DESCRIPTION("MediaTek MT8195 HDMI PHY Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.h
> b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.h
> new file mode 100644
> index 000000000000..a8202bcc01ca
> --- /dev/null
> +++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.h
> @@ -0,0 +1,131 @@
> +/* SPDX-License-Identifier: GPL-2.0 */
> +/*
> + * Copyright (c) 2021 MediaTek Inc.
> + * Copyright (c) 2021 BayLibre, SAS
2022?

> + */
> +
> +#ifndef _MTK_HDMI_PHY_8195_H
> +#define _MTK_HDMI_PHY_8195_H
> +
> +#include <linux/types.h>
move it after <linux/clk-provider.h>?

> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +
> +#define DA_HDMITXPLL_ISO_EN BIT(1)
> +#define DA_HDMITXPLL_PWR_ON BIT(2)
> +
> +#define HDMI20_CLK_CFG 0x70
> +
> +#define HDMI_1_CFG_0 0x00
> +#define HDMI_1_CFG_1 0x04
> +#define HDMI_1_CFG_10 0x40
> +#define HDMI_1_CFG_2 0x08
> +#define HDMI_1_CFG_21 0x84
> +#define HDMI_1_CFG_22 0x88
> +#define HDMI_1_CFG_3 0x0c
> +#define HDMI_1_CFG_6 0x18
> +#define HDMI_1_CFG_9 0x24
> +#define HDMI_1_PLL_CFG_0 0x44
> +#define HDMI_1_PLL_CFG_1 0x48
> +#define HDMI_1_PLL_CFG_2 0x4c
> +#define HDMI_1_PLL_CFG_3 0x50
> +#define HDMI_1_PLL_CFG_4 0x54
> +
> +#define HDMI_ANA_CTL 0x7c
> +
> +#define HDMI_CTL_1 0xc4
> +#define HDMI_CTL_3 0xcc
> +
> +#define REG_ANA_HDMI20_FIFO_EN BIT(16)
> +
> +#define REG_HDMITXPLL_DIV GENMASK(4, 0)
> +#define REG_HDMITX_PIXEL_CLOCK BIT(23)
> +#define REG_HDMITX_REF_RESPLL_SEL BIT(9)
> +#define REG_HDMITX_REF_XTAL_SEL BIT(7)
> +
> +#define REG_PIXEL_CLOCK_SEL BIT(10)
> +
> +#define REG_TXC_DIV GENMASK(31, 30)
> +
> +#define RG_HDMITX21_BG_PWD BIT(20)
> +
> +#define RG_HDMITX21_BIAS_EN BIT(29)
> +#define RG_HDMITX21_BIAS_PE_BG_VREF_SEL GENMASK(16, 15)
> +#define RG_HDMITX21_BIAS_PE_VREF_SELB BIT(10)
> +
> +#define RG_HDMITX21_CKLDO_EN BIT(3)
> +
> +#define RG_HDMITX21_CK_DRV_OP_EN BIT(11)
> +
> +#define RG_HDMITX21_D0_DRV_OP_EN BIT(10)
> +
> +#define RG_HDMITX21_D1_DRV_OP_EN BIT(9)
> +
> +#define RG_HDMITX21_D2_DRV_OP_EN BIT(8)
> +
> +#define RG_HDMITX21_DRV_EN GENMASK(27, 24)
> +#define RG_HDMITX21_DRV_IBIAS_CLK GENMASK(10, 5)
> +#define RG_HDMITX21_DRV_IBIAS_D0 GENMASK(19, 14)
> +#define RG_HDMITX21_DRV_IBIAS_D0_FFE1 GENMASK(21, 17)
> +#define RG_HDMITX21_DRV_IBIAS_D0_FFE2 GENMASK(23, 20)
> +#define RG_HDMITX21_DRV_IBIAS_D1 GENMASK(25, 20)
> +#define RG_HDMITX21_DRV_IBIAS_D1_FFE1 GENMASK(26, 22)
> +#define RG_HDMITX21_DRV_IBIAS_D1_FFE2 GENMASK(27, 24)
> +#define RG_HDMITX21_DRV_IBIAS_D2 GENMASK(31, 26)
> +#define RG_HDMITX21_DRV_IBIAS_D2_FFE1 GENMASK(31, 27)
> +#define RG_HDMITX21_DRV_IBIAS_D2_FFE2 GENMASK(31, 28)
> +#define RG_HDMITX21_DRV_IMP_CLK_EN1 GENMASK(31, 26)
> +#define RG_HDMITX21_DRV_IMP_D0_EN1 GENMASK(13, 8)
> +#define RG_HDMITX21_DRV_IMP_D1_EN1 GENMASK(19, 14)
> +#define RG_HDMITX21_DRV_IMP_D2_EN1 GENMASK(25, 20)
> +#define RG_HDMITX21_DRV_IMP_EN GENMASK(23, 20)
> +
> +#define RG_HDMITX21_FRL_CK_EN BIT(13)
> +#define RG_HDMITX21_FRL_D0_EN BIT(14)
> +#define RG_HDMITX21_FRL_D1_EN BIT(15)
> +#define RG_HDMITX21_FRL_D2_EN BIT(16)
> +#define RG_HDMITX21_FRL_EN BIT(12)
> +
> +#define RG_HDMITX21_INTR_CAL GENMASK(22, 18)
> +#define RG_HDMITX21_INTR_CAL_READOUT GENMASK(22, 18)
> +
> +#define RG_HDMITX21_SER_EN GENMASK(31, 28)
> +
> +#define RG_HDMITX21_SLDOLPF_EN BIT(7)
> +#define RG_HDMITX21_SLDO_EN GENMASK(11, 8)
> +#define RG_HDMITX21_SLDO_VREF_SEL GENMASK(5, 4)
> +
> +#define RG_HDMITX21_TX_POSDIV GENMASK(27, 26)
> +#define RG_HDMITX21_TX_POSDIV_EN BIT(28)
> +
> +#define RG_HDMITX21_VREF_SEL BIT(4)
> +
> +#define RG_HDMITXPLL_BC GENMASK(28, 27)
> +#define RG_HDMITXPLL_BP GENMASK(13, 10)
> +#define RG_HDMITXPLL_BP2 BIT(30)
> +#define RG_HDMITXPLL_BR GENMASK(21, 19)
> +#define RG_HDMITXPLL_DIV_CTRL GENMASK(25, 24)
> +#define RG_HDMITXPLL_FBKDIV_HIGH BIT(31)
> +#define RG_HDMITXPLL_FBKDIV_LOW (0xffffffff)
make sure it includes bit 31? use GENMASK()?

> +#define RG_HDMITXPLL_HIKVCO BIT(29)
> +#define RG_HDMITXPLL_HREN GENMASK(13, 12)
> +#define RG_HDMITXPLL_IBAND_FIX_EN BIT(24)
> +#define RG_HDMITXPLL_IC GENMASK(26, 22)
> +#define RG_HDMITXPLL_IR GENMASK(18, 14)
> +#define RG_HDMITXPLL_LVR_SEL GENMASK(27, 26)
> +#define RG_HDMITXPLL_POSDIV GENMASK(23, 22)
> +#define RG_HDMITXPLL_POSDIV_DIV3_CTRL BIT(21)
> +#define RG_HDMITXPLL_PREDIV GENMASK(29, 28)
> +#define RG_HDMITXPLL_PWD BIT(31)
> +#define RG_HDMITXPLL_REF_CK_SEL GENMASK(2, 1)
> +#define RG_HDMITXPLL_RESERVE GENMASK(15, 0)
> +#define RG_HDMITXPLL_RESERVE_BIT12_11 GENMASK(12, 11)
> +#define RG_HDMITXPLL_RESERVE_BIT13 BIT(13)
> +#define RG_HDMITXPLL_RESERVE_BIT14 BIT(14)
> +#define RG_HDMITXPLL_RESERVE_BIT1_0 GENMASK(1, 0)
> +#define RG_HDMITXPLL_RESERVE_BIT3_2 GENMASK(3, 2)
> +#define RG_HDMITXPLL_TCL_EN BIT(31)
> +
> +#define RG_INTR_IMP_RG_MODE GENMASK(7, 3)
It's difficult to distinguish the bits/mask which the register it
belongs to.

Do you define it according to the bits sequence in register?

Thanks

> +
> +#endif /* MTK_HDMI_PHY_8195_H */
> diff --git a/drivers/phy/mediatek/phy-mtk-hdmi.c
> b/drivers/phy/mediatek/phy-mtk-hdmi.c
> index 32f713301768..d2e824771f9d 100644
> --- a/drivers/phy/mediatek/phy-mtk-hdmi.c
> +++ b/drivers/phy/mediatek/phy-mtk-hdmi.c
> @@ -161,6 +161,9 @@ static const struct of_device_id
> mtk_hdmi_phy_match[] = {
>  	{ .compatible = "mediatek,mt8173-hdmi-phy",
>  	  .data = &mtk_hdmi_phy_8173_conf,
>  	},
> +	{ .compatible = "mediatek,mt8195-hdmi-phy",
> +	  .data = &mtk_hdmi_phy_8195_conf,
> +	},
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, mtk_hdmi_phy_match);
> diff --git a/drivers/phy/mediatek/phy-mtk-hdmi.h
> b/drivers/phy/mediatek/phy-mtk-hdmi.h
> index f5aac9d352d8..9dfb725fc57f 100644
> --- a/drivers/phy/mediatek/phy-mtk-hdmi.h
> +++ b/drivers/phy/mediatek/phy-mtk-hdmi.h
> @@ -44,6 +44,7 @@ struct mtk_hdmi_phy {
>  
>  struct mtk_hdmi_phy *to_mtk_hdmi_phy(struct clk_hw *hw);
>  
> +extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_8195_conf;
>  extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf;
>  extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_2701_conf;
>  
>