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Message-ID: <CABnWg9sDS5b6NWsxj89MekRS=2tMG10FOfe8Uf3FcU6tiVB_ww@mail.gmail.com>
Date: Wed, 2 Nov 2022 02:40:55 -0700
From: Guillaume Ranquet <granquet@...libre.com>
To: Chunfeng Yun <chunfeng.yun@...iatek.com>,
Chun-Kuang Hu <chunkuang.hu@...nel.org>,
David Airlie <airlied@...il.com>,
Philipp Zabel <p.zabel@...gutronix.de>,
Jitao shi <jitao.shi@...iatek.com>, CK Hu <ck.hu@...iatek.com>,
Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Vinod Koul <vkoul@...nel.org>,
Kishon Vijay Abraham I <kishon@...com>,
Matthias Brugger <matthias.bgg@...il.com>,
Daniel Vetter <daniel@...ll.ch>
Cc: stuart.lee@...iatek.com, linux-phy@...ts.infradead.org,
devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com>,
linux-kernel@...r.kernel.org,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
mac.shen@...iatek.com, linux-mediatek@...ts.infradead.org,
dri-devel@...ts.freedesktop.org
Subject: Re: [PATCH v2 10/12] phy: mediatek: add support for phy-mtk-hdmi-mt8195
On Fri, 21 Oct 2022 09:44, Chunfeng Yun <chunfeng.yun@...iatek.com> wrote:
>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@...libre.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@...iatek.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
Hi Chunfeng,
Thx for your review.
I don't have access to the mt8195 hdmi phy documentation sadly.
I'm basing my work on an old version of this driver submitted by mediatek
for ChromeOs on a 5.10 kernel [1]
I can try to group the bit defines with their register in V3 by looking
at the implementation.
Thx,
Guillaume.
[1] https://chromium-review.googlesource.com/c/chromiumos/third_party/kernel/+/2781485/177
>
>> +
>> +#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;
>>
>>
>
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