1 files changed, 280 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dsi/dsi.c b/drivers/gpu/drm/msm/dsi/dsi.c
new file mode 100644
index 000000000..e9036e403
--- /dev/null
+++ b/drivers/gpu/drm/msm/dsi/dsi.c
@@ -0,0 +1,280 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2015, The Linux Foundation. All rights reserved.
+ */
+
+#include "dsi.h"
+#include "dsi_cfg.h"
+
+bool msm_dsi_is_cmd_mode(struct msm_dsi *msm_dsi)
+{
+	unsigned long host_flags = msm_dsi_host_get_mode_flags(msm_dsi->host);
+
+	return !(host_flags & MIPI_DSI_MODE_VIDEO);
+}
+
+struct drm_dsc_config *msm_dsi_get_dsc_config(struct msm_dsi *msm_dsi)
+{
+	return msm_dsi_host_get_dsc_config(msm_dsi->host);
+}
+
+static int dsi_get_phy(struct msm_dsi *msm_dsi)
+{
+	struct platform_device *pdev = msm_dsi->pdev;
+	struct platform_device *phy_pdev;
+	struct device_node *phy_node;
+
+	phy_node = of_parse_phandle(pdev->dev.of_node, "phys", 0);
+	if (!phy_node) {
+		DRM_DEV_ERROR(&pdev->dev, "cannot find phy device\n");
+		return -ENXIO;
+	}
+
+	phy_pdev = of_find_device_by_node(phy_node);
+	if (phy_pdev) {
+		msm_dsi->phy = platform_get_drvdata(phy_pdev);
+		msm_dsi->phy_dev = &phy_pdev->dev;
+	}
+
+	of_node_put(phy_node);
+
+	if (!phy_pdev) {
+		DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
+		return -EPROBE_DEFER;
+	}
+	if (!msm_dsi->phy) {
+		put_device(&phy_pdev->dev);
+		DRM_DEV_ERROR(&pdev->dev, "%s: phy driver is not ready\n", __func__);
+		return -EPROBE_DEFER;
+	}
+
+	return 0;
+}
+
+static void dsi_destroy(struct msm_dsi *msm_dsi)
+{
+	if (!msm_dsi)
+		return;
+
+	msm_dsi_manager_unregister(msm_dsi);
+
+	if (msm_dsi->phy_dev) {
+		put_device(msm_dsi->phy_dev);
+		msm_dsi->phy = NULL;
+		msm_dsi->phy_dev = NULL;
+	}
+
+	if (msm_dsi->host) {
+		msm_dsi_host_destroy(msm_dsi->host);
+		msm_dsi->host = NULL;
+	}
+
+	platform_set_drvdata(msm_dsi->pdev, NULL);
+}
+
+static struct msm_dsi *dsi_init(struct platform_device *pdev)
+{
+	struct msm_dsi *msm_dsi;
+	int ret;
+
+	if (!pdev)
+		return ERR_PTR(-ENXIO);
+
+	msm_dsi = devm_kzalloc(&pdev->dev, sizeof(*msm_dsi), GFP_KERNEL);
+	if (!msm_dsi)
+		return ERR_PTR(-ENOMEM);
+	DBG("dsi probed=%p", msm_dsi);
+
+	msm_dsi->id = -1;
+	msm_dsi->pdev = pdev;
+	platform_set_drvdata(pdev, msm_dsi);
+
+	/* Init dsi host */
+	ret = msm_dsi_host_init(msm_dsi);
+	if (ret)
+		goto destroy_dsi;
+
+	/* GET dsi PHY */
+	ret = dsi_get_phy(msm_dsi);
+	if (ret)
+		goto destroy_dsi;
+
+	/* Register to dsi manager */
+	ret = msm_dsi_manager_register(msm_dsi);
+	if (ret)
+		goto destroy_dsi;
+
+	return msm_dsi;
+
+destroy_dsi:
+	dsi_destroy(msm_dsi);
+	return ERR_PTR(ret);
+}
+
+static int dsi_bind(struct device *dev, struct device *master, void *data)
+{
+	struct msm_drm_private *priv = dev_get_drvdata(master);
+	struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
+
+	priv->dsi[msm_dsi->id] = msm_dsi;
+
+	return 0;
+}
+
+static void dsi_unbind(struct device *dev, struct device *master,
+		void *data)
+{
+	struct msm_drm_private *priv = dev_get_drvdata(master);
+	struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
+
+	msm_dsi_tx_buf_free(msm_dsi->host);
+	priv->dsi[msm_dsi->id] = NULL;
+}
+
+static const struct component_ops dsi_ops = {
+	.bind   = dsi_bind,
+	.unbind = dsi_unbind,
+};
+
+int dsi_dev_attach(struct platform_device *pdev)
+{
+	return component_add(&pdev->dev, &dsi_ops);
+}
+
+void dsi_dev_detach(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &dsi_ops);
+}
+
+static int dsi_dev_probe(struct platform_device *pdev)
+{
+	struct msm_dsi *msm_dsi;
+
+	DBG("");
+	msm_dsi = dsi_init(pdev);
+	if (IS_ERR(msm_dsi)) {
+		/* Don't fail the bind if the dsi port is not connected */
+		if (PTR_ERR(msm_dsi) == -ENODEV)
+			return 0;
+		else
+			return PTR_ERR(msm_dsi);
+	}
+
+	return 0;
+}
+
+static int dsi_dev_remove(struct platform_device *pdev)
+{
+	struct msm_dsi *msm_dsi = platform_get_drvdata(pdev);
+
+	DBG("");
+	dsi_destroy(msm_dsi);
+
+	return 0;
+}
+
+static const struct of_device_id dt_match[] = {
+	{ .compatible = "qcom,mdss-dsi-ctrl", .data = NULL /* autodetect cfg */ },
+	{ .compatible = "qcom,dsi-ctrl-6g-qcm2290", .data = &qcm2290_dsi_cfg_handler },
+	{}
+};
+
+static const struct dev_pm_ops dsi_pm_ops = {
+	SET_RUNTIME_PM_OPS(msm_dsi_runtime_suspend, msm_dsi_runtime_resume, NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+static struct platform_driver dsi_driver = {
+	.probe = dsi_dev_probe,
+	.remove = dsi_dev_remove,
+	.driver = {
+		.name = "msm_dsi",
+		.of_match_table = dt_match,
+		.pm = &dsi_pm_ops,
+	},
+};
+
+void __init msm_dsi_register(void)
+{
+	DBG("");
+	msm_dsi_phy_driver_register();
+	platform_driver_register(&dsi_driver);
+}
+
+void __exit msm_dsi_unregister(void)
+{
+	DBG("");
+	msm_dsi_phy_driver_unregister();
+	platform_driver_unregister(&dsi_driver);
+}
+
+int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
+			 struct drm_encoder *encoder)
+{
+	struct msm_drm_private *priv;
+	int ret;
+
+	if (WARN_ON(!encoder) || WARN_ON(!msm_dsi) || WARN_ON(!dev))
+		return -EINVAL;
+
+	priv = dev->dev_private;
+
+	if (priv->num_bridges == ARRAY_SIZE(priv->bridges)) {
+		DRM_DEV_ERROR(dev->dev, "too many bridges\n");
+		return -ENOSPC;
+	}
+
+	msm_dsi->dev = dev;
+
+	ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
+	if (ret) {
+		DRM_DEV_ERROR(dev->dev, "failed to modeset init host: %d\n", ret);
+		goto fail;
+	}
+
+	if (msm_dsi_is_bonded_dsi(msm_dsi) &&
+	    !msm_dsi_is_master_dsi(msm_dsi)) {
+		/*
+		 * Do not return an eror here,
+		 * Just skip creating encoder/connector for the slave-DSI.
+		 */
+		return 0;
+	}
+
+	msm_dsi->encoder = encoder;
+
+	msm_dsi->bridge = msm_dsi_manager_bridge_init(msm_dsi->id);
+	if (IS_ERR(msm_dsi->bridge)) {
+		ret = PTR_ERR(msm_dsi->bridge);
+		DRM_DEV_ERROR(dev->dev, "failed to create dsi bridge: %d\n", ret);
+		msm_dsi->bridge = NULL;
+		goto fail;
+	}
+
+	ret = msm_dsi_manager_ext_bridge_init(msm_dsi->id);
+	if (ret) {
+		DRM_DEV_ERROR(dev->dev,
+			"failed to create dsi connector: %d\n", ret);
+		goto fail;
+	}
+
+	priv->bridges[priv->num_bridges++]       = msm_dsi->bridge;
+
+	return 0;
+fail:
+	/* bridge/connector are normally destroyed by drm: */
+	if (msm_dsi->bridge) {
+		msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
+		msm_dsi->bridge = NULL;
+	}
+
+	return ret;
+}
+
+void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
+{
+	msm_dsi_host_snapshot(disp_state, msm_dsi->host);
+	msm_dsi_phy_snapshot(disp_state, msm_dsi->phy);
+}
+