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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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fcda50c8f4
Global symbols in the kernel should be prefixed by the name of the subsystem and/or driver to avoid conflicts when all code is built-in. In this case, function names like 'hdmi_register' or 'hdmi_set_mode' are way too generic for an MSM specific DRM driver, so I'm renaming them all to msm_hdmi_* here. I also rename a lot of the 'static' symbols along with the global names for consistency, even though those are relatively harmless; they might only be slightly confusing when they show up in backtraces. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Rob Clark <robdclark@gmail.com>
231 lines
5.0 KiB
C
231 lines
5.0 KiB
C
/*
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* Copyright (c) 2016, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/of_device.h>
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#include "hdmi.h"
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static int msm_hdmi_phy_resource_init(struct hdmi_phy *phy)
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{
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struct hdmi_phy_cfg *cfg = phy->cfg;
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struct device *dev = &phy->pdev->dev;
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int i, ret;
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phy->regs = devm_kzalloc(dev, sizeof(phy->regs[0]) * cfg->num_regs,
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GFP_KERNEL);
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if (!phy->regs)
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return -ENOMEM;
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phy->clks = devm_kzalloc(dev, sizeof(phy->clks[0]) * cfg->num_clks,
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GFP_KERNEL);
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if (!phy->clks)
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return -ENOMEM;
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for (i = 0; i < cfg->num_regs; i++) {
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struct regulator *reg;
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reg = devm_regulator_get(dev, cfg->reg_names[i]);
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if (IS_ERR(reg)) {
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ret = PTR_ERR(reg);
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dev_err(dev, "failed to get phy regulator: %s (%d)\n",
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cfg->reg_names[i], ret);
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return ret;
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}
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phy->regs[i] = reg;
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}
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for (i = 0; i < cfg->num_clks; i++) {
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struct clk *clk;
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clk = devm_clk_get(dev, cfg->clk_names[i]);
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if (IS_ERR(clk)) {
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ret = PTR_ERR(clk);
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dev_err(dev, "failed to get phy clock: %s (%d)\n",
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cfg->clk_names[i], ret);
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return ret;
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}
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phy->clks[i] = clk;
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}
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return 0;
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}
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int msm_hdmi_phy_resource_enable(struct hdmi_phy *phy)
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{
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struct hdmi_phy_cfg *cfg = phy->cfg;
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struct device *dev = &phy->pdev->dev;
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int i, ret = 0;
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pm_runtime_get_sync(dev);
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for (i = 0; i < cfg->num_regs; i++) {
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ret = regulator_enable(phy->regs[i]);
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if (ret)
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dev_err(dev, "failed to enable regulator: %s (%d)\n",
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cfg->reg_names[i], ret);
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}
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for (i = 0; i < cfg->num_clks; i++) {
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ret = clk_prepare_enable(phy->clks[i]);
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if (ret)
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dev_err(dev, "failed to enable clock: %s (%d)\n",
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cfg->clk_names[i], ret);
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}
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return ret;
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}
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void msm_hdmi_phy_resource_disable(struct hdmi_phy *phy)
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{
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struct hdmi_phy_cfg *cfg = phy->cfg;
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struct device *dev = &phy->pdev->dev;
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int i;
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for (i = cfg->num_clks - 1; i >= 0; i--)
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clk_disable_unprepare(phy->clks[i]);
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for (i = cfg->num_regs - 1; i >= 0; i--)
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regulator_disable(phy->regs[i]);
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pm_runtime_put_sync(dev);
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}
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void msm_hdmi_phy_powerup(struct hdmi_phy *phy, unsigned long int pixclock)
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{
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if (!phy || !phy->cfg->powerup)
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return;
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phy->cfg->powerup(phy, pixclock);
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}
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void msm_hdmi_phy_powerdown(struct hdmi_phy *phy)
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{
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if (!phy || !phy->cfg->powerdown)
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return;
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phy->cfg->powerdown(phy);
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}
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static int msm_hdmi_phy_pll_init(struct platform_device *pdev,
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enum hdmi_phy_type type)
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{
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int ret;
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switch (type) {
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case MSM_HDMI_PHY_8960:
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ret = msm_hdmi_pll_8960_init(pdev);
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break;
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case MSM_HDMI_PHY_8996:
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ret = msm_hdmi_pll_8996_init(pdev);
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break;
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/*
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* we don't have PLL support for these, don't report an error for now
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*/
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case MSM_HDMI_PHY_8x60:
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case MSM_HDMI_PHY_8x74:
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default:
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ret = 0;
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break;
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}
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return ret;
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}
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static int msm_hdmi_phy_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct hdmi_phy *phy;
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int ret;
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phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
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if (!phy)
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return -ENODEV;
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phy->cfg = (struct hdmi_phy_cfg *)of_device_get_match_data(dev);
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if (!phy->cfg)
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return -ENODEV;
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phy->mmio = msm_ioremap(pdev, "hdmi_phy", "HDMI_PHY");
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if (IS_ERR(phy->mmio)) {
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dev_err(dev, "%s: failed to map phy base\n", __func__);
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return -ENOMEM;
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}
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phy->pdev = pdev;
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ret = msm_hdmi_phy_resource_init(phy);
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if (ret)
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return ret;
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pm_runtime_enable(&pdev->dev);
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ret = msm_hdmi_phy_resource_enable(phy);
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if (ret)
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return ret;
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ret = msm_hdmi_phy_pll_init(pdev, phy->cfg->type);
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if (ret) {
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dev_err(dev, "couldn't init PLL\n");
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msm_hdmi_phy_resource_disable(phy);
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return ret;
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}
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msm_hdmi_phy_resource_disable(phy);
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platform_set_drvdata(pdev, phy);
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return 0;
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}
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static int msm_hdmi_phy_remove(struct platform_device *pdev)
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{
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pm_runtime_disable(&pdev->dev);
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return 0;
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}
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static const struct of_device_id msm_hdmi_phy_dt_match[] = {
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{ .compatible = "qcom,hdmi-phy-8660",
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.data = &msm_hdmi_phy_8x60_cfg },
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{ .compatible = "qcom,hdmi-phy-8960",
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.data = &msm_hdmi_phy_8960_cfg },
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{ .compatible = "qcom,hdmi-phy-8974",
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.data = &msm_hdmi_phy_8x74_cfg },
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{ .compatible = "qcom,hdmi-phy-8084",
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.data = &msm_hdmi_phy_8x74_cfg },
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{ .compatible = "qcom,hdmi-phy-8996",
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.data = &msm_hdmi_phy_8996_cfg },
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{}
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};
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static struct platform_driver msm_hdmi_phy_platform_driver = {
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.probe = msm_hdmi_phy_probe,
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.remove = msm_hdmi_phy_remove,
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.driver = {
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.name = "msm_hdmi_phy",
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.of_match_table = msm_hdmi_phy_dt_match,
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},
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};
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void __init msm_hdmi_phy_driver_register(void)
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{
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platform_driver_register(&msm_hdmi_phy_platform_driver);
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}
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void __exit msm_hdmi_phy_driver_unregister(void)
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{
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platform_driver_unregister(&msm_hdmi_phy_platform_driver);
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}
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