Release 4.11 drivers/gpu/drm/msm/dsi/dsi.c
/*
* Copyright (c) 2015, 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 "dsi.h"
struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi)
{
if (!msm_dsi || !msm_dsi_device_connected(msm_dsi))
return NULL;
return msm_dsi->encoder;
}
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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) {
dev_err(&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);
of_node_put(phy_node);
if (!phy_pdev || !msm_dsi->phy) {
dev_err(&pdev->dev, "%s: phy driver is not ready\n", __func__);
return -EPROBE_DEFER;
}
msm_dsi->phy_dev = get_device(&phy_pdev->dev);
return 0;
}
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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);
}
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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->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);
}
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static int dsi_bind(struct device *dev, struct device *master, void *data)
{
struct drm_device *drm = dev_get_drvdata(master);
struct msm_drm_private *priv = drm->dev_private;
struct platform_device *pdev = to_platform_device(dev);
struct msm_dsi *msm_dsi;
DBG("");
msm_dsi = dsi_init(pdev);
if (IS_ERR(msm_dsi))
return PTR_ERR(msm_dsi);
priv->dsi[msm_dsi->id] = msm_dsi;
return 0;
}
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static void dsi_unbind(struct device *dev, struct device *master,
void *data)
{
struct drm_device *drm = dev_get_drvdata(master);
struct msm_drm_private *priv = drm->dev_private;
struct msm_dsi *msm_dsi = dev_get_drvdata(dev);
int id = msm_dsi->id;
if (priv->dsi[id]) {
dsi_destroy(msm_dsi);
priv->dsi[id] = NULL;
}
}
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static const struct component_ops dsi_ops = {
.bind = dsi_bind,
.unbind = dsi_unbind,
};
static int dsi_dev_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &dsi_ops);
}
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static int dsi_dev_remove(struct platform_device *pdev)
{
DBG("");
component_del(&pdev->dev, &dsi_ops);
return 0;
}
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static const struct of_device_id dt_match[] = {
{ .compatible = "qcom,mdss-dsi-ctrl" },
{}
};
static struct platform_driver dsi_driver = {
.probe = dsi_dev_probe,
.remove = dsi_dev_remove,
.driver = {
.name = "msm_dsi",
.of_match_table = dt_match,
},
};
void __init msm_dsi_register(void)
{
DBG("");
msm_dsi_phy_driver_register();
platform_driver_register(&dsi_driver);
}
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void __exit msm_dsi_unregister(void)
{
DBG("");
msm_dsi_phy_driver_unregister();
platform_driver_unregister(&dsi_driver);
}
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int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
struct drm_encoder *encoder)
{
struct msm_drm_private *priv = dev->dev_private;
struct drm_bridge *ext_bridge;
int ret;
if (WARN_ON(!encoder))
return -EINVAL;
msm_dsi->dev = dev;
ret = msm_dsi_host_modeset_init(msm_dsi->host, dev);
if (ret) {
dev_err(dev->dev, "failed to modeset init host: %d\n", ret);
goto fail;
}
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);
dev_err(dev->dev, "failed to create dsi bridge: %d\n", ret);
msm_dsi->bridge = NULL;
goto fail;
}
/*
* check if the dsi encoder output is connected to a panel or an
* external bridge. We create a connector only if we're connected to a
* drm_panel device. When we're connected to an external bridge, we
* assume that the drm_bridge driver will create the connector itself.
*/
ext_bridge = msm_dsi_host_get_bridge(msm_dsi->host);
if (ext_bridge)
msm_dsi->connector =
msm_dsi_manager_ext_bridge_init(msm_dsi->id);
else
msm_dsi->connector =
msm_dsi_manager_connector_init(msm_dsi->id);
if (IS_ERR(msm_dsi->connector)) {
ret = PTR_ERR(msm_dsi->connector);
dev_err(dev->dev,
"failed to create dsi connector: %d\n", ret);
msm_dsi->connector = NULL;
goto fail;
}
priv->bridges[priv->num_bridges++] = msm_dsi->bridge;
priv->connectors[priv->num_connectors++] = msm_dsi->connector;
return 0;
fail:
if (msm_dsi) {
/* bridge/connector are normally destroyed by drm: */
if (msm_dsi->bridge) {
msm_dsi_manager_bridge_destroy(msm_dsi->bridge);
msm_dsi->bridge = NULL;
}
/* don't destroy connector if we didn't make it */
if (msm_dsi->connector && !msm_dsi->external_bridge)
msm_dsi->connector->funcs->destroy(msm_dsi->connector);
msm_dsi->connector = NULL;
}
return ret;
}
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