Re: [PATCH v2 07/13] drm/mediatek: separae hdmi phy to different file

From: CK Hu
Date: Sun Sep 09 2018 - 22:19:40 EST

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Hi, Bibby:

On Wed, 2018-09-05 at 16:31 +0800, Bibby Hsieh wrote:
> From: chunhui dai <chunhui.dai@xxxxxxxxxxxx>
>
> Different IC has different phy setting of HDMI.
> This patch separaes the phy hardware relate part for mt8173.
>
> Signed-off-by: chunhui dai <chunhui.dai@xxxxxxxxxxxx>
> ---
> drivers/gpu/drm/mediatek/Makefile | 15 +--
> drivers/gpu/drm/mediatek/mtk_hdmi.c | 30 +++--
> drivers/gpu/drm/mediatek/mtk_hdmi.h | 26 +++++
> drivers/gpu/drm/mediatek/mtk_hdmi_phy.c | 154 +++++++++++++++++++++++++
> drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c | 129 ++-------------------
> 5 files changed, 216 insertions(+), 138 deletions(-)
> create mode 100644 drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
>
> diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
> index ce83c396a742..7f947979d68f 100644
> --- a/drivers/gpu/drm/mediatek/Makefile
> +++ b/drivers/gpu/drm/mediatek/Makefile
> @@ -1,4 +1,12 @@
> # SPDX-License-Identifier: GPL-2.0
> +mediatek-drm-hdmi-objs := mtk_cec.o \
> + mtk_hdmi.o \
> + mtk_hdmi_ddc.o \
> + mtk_mt8173_hdmi_phy.o \
> + mtk_hdmi_phy.o
> +
> +obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o
> +

It looks like you just want to add mtk_hdmi_phy.o, I think you need not
to move mediatek-drm-hdmi-objs.

> mediatek-drm-y := mtk_disp_color.o \
> mtk_disp_ovl.o \
> mtk_disp_rdma.o \
> @@ -14,10 +22,3 @@ mediatek-drm-y := mtk_disp_color.o \
> mtk_dpi.o
>
> obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
> -
> -mediatek-drm-hdmi-objs := mtk_cec.o \
> - mtk_hdmi.o \
> - mtk_hdmi_ddc.o \
> - mtk_mt8173_hdmi_phy.o
> -
> -obj-$(CONFIG_DRM_MEDIATEK_HDMI) += mediatek-drm-hdmi.o
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index 2d45d1dd9554..7c022f3f53ec 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -233,6 +233,7 @@ static void mtk_hdmi_hw_vid_black(struct mtk_hdmi *hdmi, bool black)
> static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable)
> {
> struct arm_smccc_res res;
> + struct mtk_hdmi_phy *hdmi_phy = phy_get_drvdata(hdmi->phy);
>
> /*
> * MT8173 HDMI hardware has an output control bit to enable/disable HDMI
> @@ -240,8 +241,13 @@ static void mtk_hdmi_hw_make_reg_writable(struct mtk_hdmi *hdmi, bool enable)
> * The ARM trusted firmware provides an API for the HDMI driver to set
> * this control bit to enable HDMI output in supervisor mode.
> */
> - arm_smccc_smc(MTK_SIP_SET_AUTHORIZED_SECURE_REG, 0x14000904, 0x80000000,
> - 0, 0, 0, 0, 0, &res);
> + if (hdmi_phy->conf && hdmi_phy->conf->tz_enabled)
> + arm_smccc_smc(MTK_SIP_SET_AUTHORIZED_SECURE_REG, 0x14000904,
> + 0x80000000, 0, 0, 0, 0, 0, &res);
> + else
> + regmap_update_bits(hdmi->sys_regmap,
> + hdmi->sys_offset + HDMI_SYS_CFG20,
> + 0x80008005, enable ? 0x80000005 : 0x8000);

I think this should be moved to 'drm/mediatek: add hdmi driver for
MT2701 and MT7623'. If you change the variable name to tz_disabled, you
could modify this in just one patch.

>
> regmap_update_bits(hdmi->sys_regmap, hdmi->sys_offset + HDMI_SYS_CFG20,
> HDMI_PCLK_FREE_RUN, enable ? HDMI_PCLK_FREE_RUN : 0);
> @@ -1437,6 +1443,7 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
> struct platform_device *cec_pdev;
> struct regmap *regmap;
> struct resource *mem;
> + const char *phy_name;
> int ret;
>
> ret = mtk_hdmi_get_all_clk(hdmi, np);
> @@ -1445,6 +1452,18 @@ static int mtk_hdmi_dt_parse_pdata(struct mtk_hdmi *hdmi,
> return ret;
> }
>
> + ret = of_property_read_string(np, "phy-names", &phy_name);
> + if (ret < 0) {
> + dev_err(dev, "Failed to read phy-names: %d\n", ret);
> + return ret;
> + }
> + hdmi->phy = devm_phy_get(dev, phy_name);
> + if (IS_ERR(hdmi->phy)) {
> + ret = PTR_ERR(hdmi->phy);
> + dev_err(dev, "Failed to get HDMI PHY: %d\n", ret);
> + return ret;
> + }
> +

I think this part is not related to 'separate hdmi phy to different
file' and I don't know why you do this? If you really need this,
separate this to an independent patch and describe why you do this.

Regards,
CK

> /* The CEC module handles HDMI hotplug detection */
> cec_np = of_find_compatible_node(np->parent, NULL,
> "mediatek,mt8173-cec");
> @@ -1677,13 +1696,6 @@ static int mtk_drm_hdmi_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> - hdmi->phy = devm_phy_get(dev, "hdmi");
> - if (IS_ERR(hdmi->phy)) {
> - ret = PTR_ERR(hdmi->phy);
> - dev_err(dev, "Failed to get HDMI PHY: %d\n", ret);
> - return ret;
> - }
> -
> platform_set_drvdata(pdev, hdmi);
>
> ret = mtk_hdmi_output_init(hdmi);
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.h b/drivers/gpu/drm/mediatek/mtk_hdmi.h
> index 6371b3de1ff6..a350a6c9271f 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.h
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.h
> @@ -13,11 +13,37 @@
> */
> #ifndef _MTK_HDMI_CTRL_H
> #define _MTK_HDMI_CTRL_H
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +
> +struct mtk_hdmi_phy_conf {
> + bool tz_enabled;
> + const struct clk_ops *hdmi_phy_clk_ops;
> + const struct phy_ops *hdmi_phy_dev_ops;
> +};
> +
> +struct mtk_hdmi_phy {
> + void __iomem *regs;
> + struct device *dev;
> + struct mtk_hdmi_phy_conf *conf;
> + struct clk *pll;
> + struct clk_hw pll_hw;
> + unsigned long pll_rate;
> + unsigned char drv_imp_clk;
> + unsigned char drv_imp_d2;
> + unsigned char drv_imp_d1;
> + unsigned char drv_imp_d0;
> + unsigned int ibias;
> + unsigned int ibias_up;
> +};
>
> struct platform_driver;
>
> extern struct platform_driver mtk_cec_driver;
> extern struct platform_driver mtk_hdmi_ddc_driver;
> extern struct platform_driver mtk_hdmi_phy_driver;
> +extern struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf;
>
> #endif /* _MTK_HDMI_CTRL_H */
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> new file mode 100644
> index 000000000000..82ed73575e04
> --- /dev/null
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi_phy.c
> @@ -0,0 +1,154 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Copyright (c) 2018 MediaTek Inc.
> + * Author: Jie Qiu <jie.qiu@xxxxxxxxxxxx>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/clk-provider.h>
> +#include <linux/delay.h>
> +#include <linux/kernel.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of_platform.h>
> +#include <linux/of.h>
> +#include <linux/phy/phy.h>
> +#include <linux/platform_device.h>
> +#include <linux/slab.h>
> +#include "mtk_hdmi.h"
> +
> +static void mtk_hdmi_phy_clk_get_ops(struct mtk_hdmi_phy *hdmi_phy,
> + const struct clk_ops **ops)
> +{
> + if (hdmi_phy && hdmi_phy->conf && hdmi_phy->conf->hdmi_phy_clk_ops)
> + *ops = hdmi_phy->conf->hdmi_phy_clk_ops;
> + else
> + dev_err(hdmi_phy->dev, "Failed to get clk ops of phy\n");
> +}
> +
> +static const struct phy_ops *
> +mtk_hdmi_phy_dev_get_ops(const struct mtk_hdmi_phy *hdmi_phy)
> +{
> + if (hdmi_phy && hdmi_phy->conf && hdmi_phy->conf->hdmi_phy_dev_ops)
> + return hdmi_phy->conf->hdmi_phy_dev_ops;
> + dev_err(hdmi_phy->dev, "Failed to get dev ops of phy\n");
> + return NULL;
> +}
> +
> +static int mtk_hdmi_phy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct mtk_hdmi_phy *hdmi_phy;
> + struct resource *mem;
> + struct clk *ref_clk;
> + const char *ref_clk_name;
> + struct clk_init_data clk_init = {
> + .num_parents = 1,
> + .parent_names = (const char * const *)&ref_clk_name,
> + .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE,
> + };
> +
> + struct phy *phy;
> + struct phy_provider *phy_provider;
> + int ret;
> +
> + hdmi_phy = devm_kzalloc(dev, sizeof(*hdmi_phy), GFP_KERNEL);
> + if (!hdmi_phy)
> + return -ENOMEM;
> +
> + mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> + hdmi_phy->regs = devm_ioremap_resource(dev, mem);
> + if (IS_ERR(hdmi_phy->regs)) {
> + ret = PTR_ERR(hdmi_phy->regs);
> + dev_err(dev, "Failed to get memory resource: %d\n", ret);
> + return ret;
> + }
> +
> + ref_clk = devm_clk_get(dev, "pll_ref");
> + if (IS_ERR(ref_clk)) {
> + ret = PTR_ERR(ref_clk);
> + dev_err(&pdev->dev, "Failed to get PLL reference clock: %d\n",
> + ret);
> + return ret;
> + }
> + ref_clk_name = __clk_get_name(ref_clk);
> +
> + ret = of_property_read_string(dev->of_node, "clock-output-names",
> + &clk_init.name);
> + if (ret < 0) {
> + dev_err(dev, "Failed to read clock-output-names: %d\n", ret);
> + return ret;
> + }
> +
> + hdmi_phy->dev = dev;
> + hdmi_phy->conf =
> + (struct mtk_hdmi_phy_conf *)of_device_get_match_data(dev);
> + mtk_hdmi_phy_clk_get_ops(hdmi_phy, &clk_init.ops);
> + hdmi_phy->pll_hw.init = &clk_init;
> + hdmi_phy->pll = devm_clk_register(dev, &hdmi_phy->pll_hw);
> + if (IS_ERR(hdmi_phy->pll)) {
> + ret = PTR_ERR(hdmi_phy->pll);
> + dev_err(dev, "Failed to register PLL: %d\n", ret);
> + return ret;
> + }
> +
> + ret = of_property_read_u32(dev->of_node, "mediatek,ibias",
> + &hdmi_phy->ibias);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to get ibias: %d\n", ret);
> + return ret;
> + }
> +
> + ret = of_property_read_u32(dev->of_node, "mediatek,ibias_up",
> + &hdmi_phy->ibias_up);
> + if (ret < 0) {
> + dev_err(&pdev->dev, "Failed to get ibias up: %d\n", ret);
> + return ret;
> + }
> +
> + dev_info(dev, "Using default TX DRV impedance: 4.2k/36\n");
> + hdmi_phy->drv_imp_clk = 0x30;
> + hdmi_phy->drv_imp_d2 = 0x30;
> + hdmi_phy->drv_imp_d1 = 0x30;
> + hdmi_phy->drv_imp_d0 = 0x30;
> +
> + phy = devm_phy_create(dev, NULL, mtk_hdmi_phy_dev_get_ops(hdmi_phy));
> + if (IS_ERR(phy)) {
> + dev_err(dev, "Failed to create HDMI PHY\n");
> + return PTR_ERR(phy);
> + }
> + phy_set_drvdata(phy, hdmi_phy);
> +
> + phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> + if (IS_ERR(phy_provider)) {
> + dev_err(dev, "Failed to register HDMI PHY\n");
> + return PTR_ERR(phy_provider);
> + }
> +
> + return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
> + hdmi_phy->pll);
> +}
> +
> +static int mtk_hdmi_phy_remove(struct platform_device *pdev)
> +{
> + return 0;
> +}
> +
> +static const struct of_device_id mtk_hdmi_phy_match[] = {
> + { .compatible = "mediatek,mt8173-hdmi-phy",
> + .data = &mtk_hdmi_phy_8173_conf,
> + },
> + {},
> +};
> +
> +struct platform_driver mtk_hdmi_phy_driver = {
> + .probe = mtk_hdmi_phy_probe,
> + .remove = mtk_hdmi_phy_remove,
> + .driver = {
> + .name = "mediatek-hdmi-phy",
> + .of_match_table = mtk_hdmi_phy_match,
> + },
> +};
> +
> +MODULE_DESCRIPTION("MediaTek HDMI PHY Driver");
> +MODULE_LICENSE("GPL v2");
> diff --git a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
> index 51cb9cfb6646..1a35fdd405d8 100644
> --- a/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
> +++ b/drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c
> @@ -21,6 +21,7 @@
> #include <linux/phy/phy.h>
> #include <linux/platform_device.h>
> #include <linux/types.h>
> +#include "mtk_hdmi.h"
>
> #define HDMI_CON0 0x00
> #define RG_HDMITX_PLL_EN BIT(31)
> @@ -123,20 +124,6 @@
> #define RGS_HDMITX_5T1_EDG (0xf << 4)
> #define RGS_HDMITX_PLUG_TST BIT(0)
>
> -struct mtk_hdmi_phy {
> - void __iomem *regs;
> - struct device *dev;
> - struct clk *pll;
> - struct clk_hw pll_hw;
> - unsigned long pll_rate;
> - u8 drv_imp_clk;
> - u8 drv_imp_d2;
> - u8 drv_imp_d1;
> - u8 drv_imp_d0;
> - u32 ibias;
> - u32 ibias_up;
> -};
> -
> static const u8 PREDIV[3][4] = {
> {0x0, 0x0, 0x0, 0x0}, /* 27Mhz */
> {0x1, 0x1, 0x1, 0x1}, /* 74Mhz */
> @@ -367,7 +354,7 @@ static unsigned long mtk_hdmi_pll_recalc_rate(struct clk_hw *hw,
> return hdmi_phy->pll_rate;
> }
>
> -static const struct clk_ops mtk_hdmi_pll_ops = {
> +static const struct clk_ops mtk_hdmi_phy_pll_ops = {
> .prepare = mtk_hdmi_pll_prepare,
> .unprepare = mtk_hdmi_pll_unprepare,
> .set_rate = mtk_hdmi_pll_set_rate,
> @@ -414,118 +401,16 @@ static int mtk_hdmi_phy_power_off(struct phy *phy)
> return 0;
> }
>
> -static const struct phy_ops mtk_hdmi_phy_ops = {
> +static const struct phy_ops mtk_hdmi_phy_dev_ops = {
> .power_on = mtk_hdmi_phy_power_on,
> .power_off = mtk_hdmi_phy_power_off,
> .owner = THIS_MODULE,
> };
>
> -static int mtk_hdmi_phy_probe(struct platform_device *pdev)
> -{
> - struct device *dev = &pdev->dev;
> - struct mtk_hdmi_phy *hdmi_phy;
> - struct resource *mem;
> - struct clk *ref_clk;
> - const char *ref_clk_name;
> - struct clk_init_data clk_init = {
> - .ops = &mtk_hdmi_pll_ops,
> - .num_parents = 1,
> - .parent_names = (const char * const *)&ref_clk_name,
> - .flags = CLK_SET_RATE_PARENT | CLK_SET_RATE_GATE,
> - };
> - struct phy *phy;
> - struct phy_provider *phy_provider;
> - int ret;
> -
> - hdmi_phy = devm_kzalloc(dev, sizeof(*hdmi_phy), GFP_KERNEL);
> - if (!hdmi_phy)
> - return -ENOMEM;
> -
> - mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
> - hdmi_phy->regs = devm_ioremap_resource(dev, mem);
> - if (IS_ERR(hdmi_phy->regs)) {
> - ret = PTR_ERR(hdmi_phy->regs);
> - dev_err(dev, "Failed to get memory resource: %d\n", ret);
> - return ret;
> - }
> -
> - ref_clk = devm_clk_get(dev, "pll_ref");
> - if (IS_ERR(ref_clk)) {
> - ret = PTR_ERR(ref_clk);
> - dev_err(&pdev->dev, "Failed to get PLL reference clock: %d\n",
> - ret);
> - return ret;
> - }
> - ref_clk_name = __clk_get_name(ref_clk);
> -
> - ret = of_property_read_string(dev->of_node, "clock-output-names",
> - &clk_init.name);
> - if (ret < 0) {
> - dev_err(dev, "Failed to read clock-output-names: %d\n", ret);
> - return ret;
> - }
> -
> - hdmi_phy->pll_hw.init = &clk_init;
> - hdmi_phy->pll = devm_clk_register(dev, &hdmi_phy->pll_hw);
> - if (IS_ERR(hdmi_phy->pll)) {
> - ret = PTR_ERR(hdmi_phy->pll);
> - dev_err(dev, "Failed to register PLL: %d\n", ret);
> - return ret;
> - }
> -
> - ret = of_property_read_u32(dev->of_node, "mediatek,ibias",
> - &hdmi_phy->ibias);
> - if (ret < 0) {
> - dev_err(&pdev->dev, "Failed to get ibias: %d\n", ret);
> - return ret;
> - }
> -
> - ret = of_property_read_u32(dev->of_node, "mediatek,ibias_up",
> - &hdmi_phy->ibias_up);
> - if (ret < 0) {
> - dev_err(&pdev->dev, "Failed to get ibias up: %d\n", ret);
> - return ret;
> - }
> -
> - dev_info(dev, "Using default TX DRV impedance: 4.2k/36\n");
> - hdmi_phy->drv_imp_clk = 0x30;
> - hdmi_phy->drv_imp_d2 = 0x30;
> - hdmi_phy->drv_imp_d1 = 0x30;
> - hdmi_phy->drv_imp_d0 = 0x30;
> -
> - phy = devm_phy_create(dev, NULL, &mtk_hdmi_phy_ops);
> - if (IS_ERR(phy)) {
> - dev_err(dev, "Failed to create HDMI PHY\n");
> - return PTR_ERR(phy);
> - }
> - phy_set_drvdata(phy, hdmi_phy);
> -
> - phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
> - if (IS_ERR(phy_provider))
> - return PTR_ERR(phy_provider);
> -
> - hdmi_phy->dev = dev;
> - return of_clk_add_provider(dev->of_node, of_clk_src_simple_get,
> - hdmi_phy->pll);
> -}
> -
> -static int mtk_hdmi_phy_remove(struct platform_device *pdev)
> -{
> - return 0;
> -}
> -
> -static const struct of_device_id mtk_hdmi_phy_match[] = {
> - { .compatible = "mediatek,mt8173-hdmi-phy", },
> - {},
> -};
> -
> -struct platform_driver mtk_hdmi_phy_driver = {
> - .probe = mtk_hdmi_phy_probe,
> - .remove = mtk_hdmi_phy_remove,
> - .driver = {
> - .name = "mediatek-hdmi-phy",
> - .of_match_table = mtk_hdmi_phy_match,
> - },
> +struct mtk_hdmi_phy_conf mtk_hdmi_phy_8173_conf = {
> + .tz_enabled = true,
> + .hdmi_phy_clk_ops = &mtk_hdmi_phy_pll_ops,
> + .hdmi_phy_dev_ops = &mtk_hdmi_phy_dev_ops,
> };
>
> MODULE_AUTHOR("Jie Qiu <jie.qiu@xxxxxxxxxxxx>");

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