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path: root/drivers/gpu/drm/msm/hdmi/hdmi_phy.c
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Diffstat (limited to 'drivers/gpu/drm/msm/hdmi/hdmi_phy.c')
-rw-r--r--drivers/gpu/drm/msm/hdmi/hdmi_phy.c230
1 files changed, 230 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_phy.c b/drivers/gpu/drm/msm/hdmi/hdmi_phy.c
new file mode 100644
index 000000000000..534ce5b49781
--- /dev/null
+++ b/drivers/gpu/drm/msm/hdmi/hdmi_phy.c
@@ -0,0 +1,230 @@
+/*
+ * Copyright (c) 2016, The Linux Foundation. All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/of_device.h>
+
+#include "hdmi.h"
+
+static int msm_hdmi_phy_resource_init(struct hdmi_phy *phy)
+{
+ struct hdmi_phy_cfg *cfg = phy->cfg;
+ struct device *dev = &phy->pdev->dev;
+ int i, ret;
+
+ phy->regs = devm_kzalloc(dev, sizeof(phy->regs[0]) * cfg->num_regs,
+ GFP_KERNEL);
+ if (!phy->regs)
+ return -ENOMEM;
+
+ phy->clks = devm_kzalloc(dev, sizeof(phy->clks[0]) * cfg->num_clks,
+ GFP_KERNEL);
+ if (!phy->clks)
+ return -ENOMEM;
+
+ for (i = 0; i < cfg->num_regs; i++) {
+ struct regulator *reg;
+
+ reg = devm_regulator_get(dev, cfg->reg_names[i]);
+ if (IS_ERR(reg)) {
+ ret = PTR_ERR(reg);
+ dev_err(dev, "failed to get phy regulator: %s (%d)\n",
+ cfg->reg_names[i], ret);
+ return ret;
+ }
+
+ phy->regs[i] = reg;
+ }
+
+ for (i = 0; i < cfg->num_clks; i++) {
+ struct clk *clk;
+
+ clk = devm_clk_get(dev, cfg->clk_names[i]);
+ if (IS_ERR(clk)) {
+ ret = PTR_ERR(clk);
+ dev_err(dev, "failed to get phy clock: %s (%d)\n",
+ cfg->clk_names[i], ret);
+ return ret;
+ }
+
+ phy->clks[i] = clk;
+ }
+
+ return 0;
+}
+
+int msm_hdmi_phy_resource_enable(struct hdmi_phy *phy)
+{
+ struct hdmi_phy_cfg *cfg = phy->cfg;
+ struct device *dev = &phy->pdev->dev;
+ int i, ret = 0;
+
+ pm_runtime_get_sync(dev);
+
+ for (i = 0; i < cfg->num_regs; i++) {
+ ret = regulator_enable(phy->regs[i]);
+ if (ret)
+ dev_err(dev, "failed to enable regulator: %s (%d)\n",
+ cfg->reg_names[i], ret);
+ }
+
+ for (i = 0; i < cfg->num_clks; i++) {
+ ret = clk_prepare_enable(phy->clks[i]);
+ if (ret)
+ dev_err(dev, "failed to enable clock: %s (%d)\n",
+ cfg->clk_names[i], ret);
+ }
+
+ return ret;
+}
+
+void msm_hdmi_phy_resource_disable(struct hdmi_phy *phy)
+{
+ struct hdmi_phy_cfg *cfg = phy->cfg;
+ struct device *dev = &phy->pdev->dev;
+ int i;
+
+ for (i = cfg->num_clks - 1; i >= 0; i--)
+ clk_disable_unprepare(phy->clks[i]);
+
+ for (i = cfg->num_regs - 1; i >= 0; i--)
+ regulator_disable(phy->regs[i]);
+
+ pm_runtime_put_sync(dev);
+}
+
+void msm_hdmi_phy_powerup(struct hdmi_phy *phy, unsigned long int pixclock)
+{
+ if (!phy || !phy->cfg->powerup)
+ return;
+
+ phy->cfg->powerup(phy, pixclock);
+}
+
+void msm_hdmi_phy_powerdown(struct hdmi_phy *phy)
+{
+ if (!phy || !phy->cfg->powerdown)
+ return;
+
+ phy->cfg->powerdown(phy);
+}
+
+static int msm_hdmi_phy_pll_init(struct platform_device *pdev,
+ enum hdmi_phy_type type)
+{
+ int ret;
+
+ switch (type) {
+ case MSM_HDMI_PHY_8960:
+ ret = msm_hdmi_pll_8960_init(pdev);
+ break;
+ case MSM_HDMI_PHY_8996:
+ ret = msm_hdmi_pll_8996_init(pdev);
+ break;
+ /*
+ * we don't have PLL support for these, don't report an error for now
+ */
+ case MSM_HDMI_PHY_8x60:
+ case MSM_HDMI_PHY_8x74:
+ default:
+ ret = 0;
+ break;
+ }
+
+ return ret;
+}
+
+static int msm_hdmi_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct hdmi_phy *phy;
+ int ret;
+
+ phy = devm_kzalloc(dev, sizeof(*phy), GFP_KERNEL);
+ if (!phy)
+ return -ENODEV;
+
+ phy->cfg = (struct hdmi_phy_cfg *)of_device_get_match_data(dev);
+ if (!phy->cfg)
+ return -ENODEV;
+
+ phy->mmio = msm_ioremap(pdev, "hdmi_phy", "HDMI_PHY");
+ if (IS_ERR(phy->mmio)) {
+ dev_err(dev, "%s: failed to map phy base\n", __func__);
+ return -ENOMEM;
+ }
+
+ phy->pdev = pdev;
+
+ ret = msm_hdmi_phy_resource_init(phy);
+ if (ret)
+ return ret;
+
+ pm_runtime_enable(&pdev->dev);
+
+ ret = msm_hdmi_phy_resource_enable(phy);
+ if (ret)
+ return ret;
+
+ ret = msm_hdmi_phy_pll_init(pdev, phy->cfg->type);
+ if (ret) {
+ dev_err(dev, "couldn't init PLL\n");
+ msm_hdmi_phy_resource_disable(phy);
+ return ret;
+ }
+
+ msm_hdmi_phy_resource_disable(phy);
+
+ platform_set_drvdata(pdev, phy);
+
+ return 0;
+}
+
+static int msm_hdmi_phy_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+
+ return 0;
+}
+
+static const struct of_device_id msm_hdmi_phy_dt_match[] = {
+ { .compatible = "qcom,hdmi-phy-8660",
+ .data = &msm_hdmi_phy_8x60_cfg },
+ { .compatible = "qcom,hdmi-phy-8960",
+ .data = &msm_hdmi_phy_8960_cfg },
+ { .compatible = "qcom,hdmi-phy-8974",
+ .data = &msm_hdmi_phy_8x74_cfg },
+ { .compatible = "qcom,hdmi-phy-8084",
+ .data = &msm_hdmi_phy_8x74_cfg },
+ { .compatible = "qcom,hdmi-phy-8996",
+ .data = &msm_hdmi_phy_8996_cfg },
+ {}
+};
+
+static struct platform_driver msm_hdmi_phy_platform_driver = {
+ .probe = msm_hdmi_phy_probe,
+ .remove = msm_hdmi_phy_remove,
+ .driver = {
+ .name = "msm_hdmi_phy",
+ .of_match_table = msm_hdmi_phy_dt_match,
+ },
+};
+
+void __init msm_hdmi_phy_driver_register(void)
+{
+ platform_driver_register(&msm_hdmi_phy_platform_driver);
+}
+
+void __exit msm_hdmi_phy_driver_unregister(void)
+{
+ platform_driver_unregister(&msm_hdmi_phy_platform_driver);
+}