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From:   Guillaume Ranquet <granquet@baylibre.com>
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References: <20220919-v5-0-f346444bc459@baylibre.com> <20220919-v5-3-f346444bc459@baylibre.com>
 <Y8BPo7+mwEHpnXrb@matsya>
In-Reply-To: <Y8BPo7+mwEHpnXrb@matsya>
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Date:   Thu, 19 Jan 2023 02:04:37 -0800
Message-ID: <CABnWg9tULhWCJ=UhkJaKVpyK0=upKyGc_z0hjC6hofdUrRSUrg@mail.gmail.com>
Subject: Re: [PATCH v5 3/3] phy: mediatek: add support for phy-mtk-hdmi-mt8195
To:     Vinod Koul <vkoul@kernel.org>
Cc:     Chunfeng Yun <chunfeng.yun@mediatek.com>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        David Airlie <airlied@gmail.com>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Philipp Zabel <p.zabel@pengutronix.de>,
        Rob Herring <robh+dt@kernel.org>,
        Kishon Vijay Abraham I <kishon@ti.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Chun-Kuang Hu <chunkuang.hu@kernel.org>,
        CK Hu <ck.hu@mediatek.com>, Jitao shi <jitao.shi@mediatek.com>,
        mac.shen@mediatek.com,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        linux-arm-kernel@lists.infradead.org, stuart.lee@mediatek.com,
        kernel test robot <lkp@intel.com>,
        linux-phy@lists.infradead.org, linux-kernel@vger.kernel.org,
        devicetree@vger.kernel.org,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        linux-mediatek@lists.infradead.org
Content-Type: text/plain; charset="UTF-8"
Precedence: bulk

On Thu, 12 Jan 2023 19:21, Vinod Koul <vkoul@kernel.org> wrote:
>On 28-11-22, 17:17, Guillaume Ranquet wrote:
>> Add support for the mediatek hdmi phy on MT8195 SoC
>>
>> Reported-by: kernel test robot <lkp@intel.com>
>
>??
>

Hi Vinod, thx for the review.

I've added the 'Reported-by' trailer as the kernel test bot found an
issue on v4 of this series.
The report is here:
https://lore.kernel.org/all/202211221017.utnrer67-lkp@intel.com/

I've since been told to drop that trailer as this should not be
applied for new drivers.

I'll take care of the rest of your remarks in v6.

Thx,
Guillaume.

>> Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
>> ---
>>  drivers/phy/mediatek/Makefile              |   1 +
>>  drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c | 527 +++++++++++++++++++++++++++++
>>  drivers/phy/mediatek/phy-mtk-hdmi-mt8195.h | 111 ++++++
>>  drivers/phy/mediatek/phy-mtk-hdmi.c        |   3 +
>>  drivers/phy/mediatek/phy-mtk-hdmi.h        |   1 +
>>  5 files changed, 643 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..822f5fa29025
>> --- /dev/null
>> +++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.c
>> @@ -0,0 +1,527 @@
>> +// SPDX-License-Identifier: GPL-2.0
>> +/*
>> + * Copyright (c) 2022 MediaTek Inc.
>> + * Copyright (c) 2022 BayLibre, SAS
>> + */
>> +#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)
>
>can we have shorter fn names please, mt8195_tmds_high_bit_clk_ratio()
>should be fine as well or more shorter!
>
>> +{
>> +	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 */
>
>These comments are not very helpful! Please make them sensible or drop
>them!
>
>> +	mtk_phy_set_bits(regs + HDMI_1_PLL_CFG_0, RG_HDMITXPLL_TCL_EN);
>> +
>> +	return 0;
>
>why have return when you always return success!
>
>> +}
>> +
>> +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;
>> +	unsigned char div3_ctrl_value;
>> +	unsigned char posdiv_vallue;
>> +	unsigned char div_ctrl_value;
>> +	unsigned char reserve_3_2_value;
>> +	unsigned char prediv_value;
>> +	unsigned char reserve13_value;
>
>why are arguments to this fn and these defines as char? You are writing
>them to a registers, pls use u8/u16/u32...
>
>
>> +	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:
>> +		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;
>> +}
>> +
>> +static int mtk_hdmi_pll_calculate_params(struct clk_hw *hw, unsigned long rate,
>> +					 unsigned long parent_rate)
>> +{
>> +	int ret;
>> +	u64 tmds_clk, pixel_clk;
>> +	/* pll input source frequency */
>> +	u64 da_hdmitx21_ref_ck;
>> +	/* ICO output clk */
>> +	u64 ns_hdmipll_ck;
>> +	/* source clk for Display digital */
>> +	u8 digital_div;
>> +	u64 pcw;
>> +	u32 fbkdiv_high;
>> +	u32 fbkdiv_low;
>> +	u8 txprediv, txposdiv, posdiv1, posdiv2;
>> +	/* prediv is always 1 */
>> +	u8 prediv = 1;
>> +	/* fbkdiv_hs3 is always 1 */
>> +	u8 fbkdiv_hs3 = 1;
>> +	u8 txpredivs[4] = { 2, 4, 6, 12 };
>> +	int i;
>> +
>> +	pixel_clk = rate;
>> +	tmds_clk = pixel_clk;
>> +
>> +	if (tmds_clk < 25000000 || tmds_clk > 594000000)
>> +		return -EINVAL;
>> +
>> +	/* in Hz */
>> +	da_hdmitx21_ref_ck = 26000000UL;
>> +
>> +	/*  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 < 148350000UL)
>> +		txposdiv = 4;
>> +	else if (tmds_clk < 296700000UL)
>> +		txposdiv = 2;
>> +	else if (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 = div_u64(((u64)ns_hdmipll_ck) << PCW_DECIMAL_WIDTH,
>> +		      da_hdmitx21_ref_ck / fbkdiv_hs3);
>> +
>> +	if (pcw > GENMASK_ULL(32, 0))
>> +		return -EINVAL;
>> +
>> +	fbkdiv_high = FIELD_GET(GENMASK_ULL(63, 32), pcw);
>> +	fbkdiv_low = FIELD_GET(GENMASK(31, 0), pcw);
>> +
>> +	/* posdiv1:
>> +	 * posdiv1 stage treatment according to color_depth:
>> +	 * 24bit -> posdiv1 /10, 30bit -> posdiv1 /12.5,
>> +	 * 36bit -> posdiv1 /15, 48bit -> posdiv1 /10
>> +	 */
>> +	posdiv1 = 10;
>> +	posdiv2 = 1;
>> +
>> +	/* Digital clk divider, max /32 */
>> +	digital_div = div_u64((u64)ns_hdmipll_ck, posdiv1 / posdiv2 / 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) {
>> +		data_channel_bias = 0x34; /* 20mA */
>> +		clk_channel_bias = 0x2c; /* 16mA */
>> +		impedance_en = 0xf;
>> +		impedance = 0x36; /* 100ohm */
>> +	} else if (pixel_clk >= 27000000UL) {
>> +		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);
>> +
>> +	dev_dbg(hdmi_phy->dev, "%s: %lu Hz, parent: %lu Hz\n", __func__, rate,
>> +		parent_rate);
>> +
>> +	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;
>> +
>> +	ret = clk_set_rate(hdmi_phy->pll, dp_opts->link_rate);
>> +	if (ret)
>> +		return ret;
>> +
>> +	mtk_mt8195_phy_tmds_high_bit_clk_ratio(hdmi_phy, false);
>> +
>> +	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..c7b364e7cfbb
>> --- /dev/null
>> +++ b/drivers/phy/mediatek/phy-mtk-hdmi-mt8195.h
>> @@ -0,0 +1,111 @@
>> +/* SPDX-License-Identifier: GPL-2.0 */
>> +/*
>> + * Copyright (c) 2022 MediaTek Inc.
>> + * Copyright (c) 2022 BayLibre, SAS
>> + */
>> +
>> +#ifndef _MTK_HDMI_PHY_8195_H
>> +#define _MTK_HDMI_PHY_8195_H
>> +
>> +#include <linux/clk.h>
>> +#include <linux/clk-provider.h>
>> +#include <linux/types.h>
>> +
>> +#define PCW_DECIMAL_WIDTH 24
>> +
>> +#define HDMI20_CLK_CFG 0x70
>> +#define REG_TXC_DIV GENMASK(31, 30)
>> +
>> +#define HDMI_1_CFG_0 0x00
>> +#define RG_HDMITX21_DRV_IBIAS_CLK GENMASK(10, 5)
>> +#define RG_HDMITX21_DRV_IMP_EN GENMASK(23, 20)
>> +#define RG_HDMITX21_DRV_EN GENMASK(27, 24)
>> +#define RG_HDMITX21_SER_EN GENMASK(31, 28)
>> +
>> +#define HDMI_1_CFG_1 0x04
>> +#define RG_HDMITX21_DRV_IBIAS_D0 GENMASK(19, 14)
>> +#define RG_HDMITX21_DRV_IBIAS_D1 GENMASK(25, 20)
>> +#define RG_HDMITX21_DRV_IBIAS_D2 GENMASK(31, 26)
>> +
>> +#define HDMI_1_CFG_10 0x40
>> +#define RG_HDMITXPLL_REF_CK_SEL GENMASK(2, 1)
>> +#define RG_HDMITX21_VREF_SEL BIT(4)
>> +#define RG_HDMITX21_BIAS_PE_VREF_SELB BIT(10)
>> +#define RG_HDMITX21_BIAS_PE_BG_VREF_SEL GENMASK(16, 15)
>> +#define RG_HDMITX21_BG_PWD BIT(20)
>> +
>> +#define HDMI_1_CFG_2 0x08
>> +#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_CLK_EN1 GENMASK(31, 26)
>> +
>> +#define HDMI_1_CFG_3 0x0c
>> +#define RG_HDMITX21_CKLDO_EN BIT(3)
>> +#define RG_HDMITX21_SLDOLPF_EN BIT(7)
>> +#define RG_HDMITX21_SLDO_EN GENMASK(11, 8)
>> +
>> +#define HDMI_1_CFG_6 0x18
>> +#define RG_HDMITX21_D2_DRV_OP_EN BIT(8)
>> +#define RG_HDMITX21_D1_DRV_OP_EN BIT(9)
>> +#define RG_HDMITX21_D0_DRV_OP_EN BIT(10)
>> +#define RG_HDMITX21_CK_DRV_OP_EN BIT(11)
>> +#define RG_HDMITX21_FRL_EN BIT(12)
>> +#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_INTR_CAL GENMASK(22, 18)
>> +#define RG_HDMITX21_TX_POSDIV GENMASK(27, 26)
>> +#define RG_HDMITX21_TX_POSDIV_EN BIT(28)
>> +#define RG_HDMITX21_BIAS_EN BIT(29)
>> +
>> +#define HDMI_1_CFG_9 0x24
>> +#define RG_HDMITX21_SLDO_VREF_SEL GENMASK(5, 4)
>> +
>> +#define HDMI_1_PLL_CFG_0 0x44
>> +#define RG_HDMITXPLL_HREN GENMASK(13, 12)
>> +#define RG_HDMITXPLL_IBAND_FIX_EN BIT(24)
>> +#define RG_HDMITXPLL_LVR_SEL GENMASK(27, 26)
>> +#define RG_HDMITXPLL_BP2 BIT(30)
>> +#define RG_HDMITXPLL_TCL_EN BIT(31)
>> +
>> +#define HDMI_1_PLL_CFG_1 0x48
>> +#define RG_HDMITXPLL_RESERVE_BIT1_0 GENMASK(1, 0)
>> +#define RG_HDMITXPLL_RESERVE_BIT3_2 GENMASK(3, 2)
>> +#define RG_HDMITXPLL_RESERVE_BIT12_11 GENMASK(12, 11)
>> +#define RG_HDMITXPLL_RESERVE_BIT13 BIT(13)
>> +#define RG_HDMITXPLL_RESERVE_BIT14 BIT(14)
>> +
>> +#define HDMI_1_PLL_CFG_2 0x4c
>> +#define RG_HDMITXPLL_BC GENMASK(28, 27)
>> +#define RG_HDMITXPLL_IC GENMASK(26, 22)
>> +#define RG_HDMITXPLL_BR GENMASK(21, 19)
>> +#define RG_HDMITXPLL_IR GENMASK(18, 14)
>> +#define RG_HDMITXPLL_BP GENMASK(13, 10)
>> +#define RG_HDMITXPLL_HIKVCO BIT(29)
>> +#define RG_HDMITXPLL_PWD BIT(31)
>> +
>> +#define HDMI_1_PLL_CFG_3 0x50
>> +#define RG_HDMITXPLL_FBKDIV_LOW GENMASK(31, 0)
>> +
>> +#define HDMI_1_PLL_CFG_4 0x54
>> +#define DA_HDMITXPLL_ISO_EN BIT(1)
>> +#define DA_HDMITXPLL_PWR_ON BIT(2)
>> +#define RG_HDMITXPLL_POSDIV_DIV3_CTRL BIT(21)
>> +#define RG_HDMITXPLL_POSDIV GENMASK(23, 22)
>> +#define RG_HDMITXPLL_DIV_CTRL GENMASK(25, 24)
>> +#define RG_HDMITXPLL_PREDIV GENMASK(29, 28)
>> +#define RG_HDMITXPLL_FBKDIV_HIGH BIT(31)
>> +
>> +#define HDMI_ANA_CTL 0x7c
>> +#define REG_ANA_HDMI20_FIFO_EN BIT(16)
>> +
>> +#define HDMI_CTL_3 0xcc
>> +#define REG_HDMITXPLL_DIV GENMASK(4, 0)
>> +#define REG_HDMITX_REF_XTAL_SEL BIT(7)
>> +#define REG_HDMITX_REF_RESPLL_SEL BIT(9)
>> +#define REG_PIXEL_CLOCK_SEL BIT(10)
>> +#define REG_HDMITX_PIXEL_CLOCK BIT(23)
>> +
>> +#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;
>>
>>
>> --
>> 2.38.1
>
>--
>~Vinod