// SPDX-License-Identifier: GPL-2.0-only
/*
* Hisilicon Kirin SoCs drm master driver
*
* Copyright (c) 2016 Linaro Limited.
* Copyright (c) 2014-2016 HiSilicon Limited.
*
* Author:
* Xinliang Liu <[email protected]>
* Xinliang Liu <[email protected]>
* Xinwei Kong <[email protected]>
*/
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
#include <linux/platform_device.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_dma.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_module.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#include "kirin_drm_drv.h"
#define KIRIN_MAX_PLANE 2
struct kirin_drm_private {
struct kirin_crtc crtc;
struct kirin_plane planes[KIRIN_MAX_PLANE];
void *hw_ctx;
};
static int kirin_drm_crtc_init(struct drm_device *dev, struct drm_crtc *crtc,
struct drm_plane *plane,
const struct kirin_drm_data *driver_data)
{
struct device_node *port;
int ret;
/* set crtc port so that
* drm_of_find_possible_crtcs call works
*/
port = of_get_child_by_name(dev->dev->of_node, "port");
if (!port) {
DRM_ERROR("no port node found in %pOF\n", dev->dev->of_node);
return -EINVAL;
}
of_node_put(port);
crtc->port = port;
ret = drm_crtc_init_with_planes(dev, crtc, plane, NULL,
driver_data->crtc_funcs, NULL);
if (ret) {
DRM_ERROR("failed to init crtc.\n");
return ret;
}
drm_crtc_helper_add(crtc, driver_data->crtc_helper_funcs);
return 0;
}
static int kirin_drm_plane_init(struct drm_device *dev, struct drm_plane *plane,
enum drm_plane_type type,
const struct kirin_drm_data *data)
{
int ret = 0;
ret = drm_universal_plane_init(dev, plane, 1, data->plane_funcs,
data->channel_formats,
data->channel_formats_cnt,
NULL, type, NULL);
if (ret) {
DRM_ERROR("fail to init plane, ch=%d\n", 0);
return ret;
}
drm_plane_helper_add(plane, data->plane_helper_funcs);
return 0;
}
static void kirin_drm_private_cleanup(struct drm_device *dev)
{
struct kirin_drm_private *kirin_priv = dev->dev_private;
struct kirin_drm_data *data;
data = (struct kirin_drm_data *)of_device_get_match_data(dev->dev);
if (data->cleanup_hw_ctx)
data->cleanup_hw_ctx(kirin_priv->hw_ctx);
devm_kfree(dev->dev, kirin_priv);
dev->dev_private = NULL;
}
static int kirin_drm_private_init(struct drm_device *dev,
const struct kirin_drm_data *driver_data)
{
struct platform_device *pdev = to_platform_device(dev->dev);
struct kirin_drm_private *kirin_priv;
struct drm_plane *prim_plane;
enum drm_plane_type type;
void *ctx;
int ret;
u32 ch;
kirin_priv = devm_kzalloc(dev->dev, sizeof(*kirin_priv), GFP_KERNEL);
if (!kirin_priv) {
DRM_ERROR("failed to alloc kirin_drm_private\n");
return -ENOMEM;
}
ctx = driver_data->alloc_hw_ctx(pdev, &kirin_priv->crtc.base);
if (IS_ERR(ctx)) {
DRM_ERROR("failed to initialize kirin_priv hw ctx\n");
return -EINVAL;
}
kirin_priv->hw_ctx = ctx;
/*
* plane init
* TODO: Now only support primary plane, overlay planes
* need to do.
*/
for (ch = 0; ch < driver_data->num_planes; ch++) {
if (ch == driver_data->prim_plane)
type = DRM_PLANE_TYPE_PRIMARY;
else
type = DRM_PLANE_TYPE_OVERLAY;
ret = kirin_drm_plane_init(dev, &kirin_priv->planes[ch].base,
type, driver_data);
if (ret)
return ret;
kirin_priv->planes[ch].ch = ch;
kirin_priv->planes[ch].hw_ctx = ctx;
}
/* crtc init */
prim_plane = &kirin_priv->planes[driver_data->prim_plane].base;
ret = kirin_drm_crtc_init(dev, &kirin_priv->crtc.base,
prim_plane, driver_data);
if (ret)
return ret;
kirin_priv->crtc.hw_ctx = ctx;
dev->dev_private = kirin_priv;
return 0;
}
static int kirin_drm_kms_init(struct drm_device *dev,
const struct kirin_drm_data *driver_data)
{
int ret;
/* dev->mode_config initialization */
drm_mode_config_init(dev);
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
dev->mode_config.max_width = driver_data->config_max_width;
dev->mode_config.max_height = driver_data->config_max_width;
dev->mode_config.funcs = driver_data->mode_config_funcs;
/* display controller init */
ret = kirin_drm_private_init(dev, driver_data);
if (ret)
goto err_mode_config_cleanup;
/* bind and init sub drivers */
ret = component_bind_all(dev->dev, dev);
if (ret) {
DRM_ERROR("failed to bind all component.\n");
goto err_private_cleanup;
}
/* vblank init */
ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
if (ret) {
DRM_ERROR("failed to initialize vblank.\n");
goto err_unbind_all;
}
/* reset all the states of crtc/plane/encoder/connector */
drm_mode_config_reset(dev);
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(dev);
return 0;
err_unbind_all:
component_unbind_all(dev->dev, dev);
err_private_cleanup:
kirin_drm_private_cleanup(dev);
err_mode_config_cleanup:
drm_mode_config_cleanup(dev);
return ret;
}
static int kirin_drm_kms_cleanup(struct drm_device *dev)
{
drm_kms_helper_poll_fini(dev);
drm_atomic_helper_shutdown(dev);
kirin_drm_private_cleanup(dev);
drm_mode_config_cleanup(dev);
return 0;
}
static int kirin_drm_bind(struct device *dev)
{
struct kirin_drm_data *driver_data;
struct drm_device *drm_dev;
int ret;
driver_data = (struct kirin_drm_data *)of_device_get_match_data(dev);
if (!driver_data)
return -EINVAL;
drm_dev = drm_dev_alloc(driver_data->driver, dev);
if (IS_ERR(drm_dev))
return PTR_ERR(drm_dev);
dev_set_drvdata(dev, drm_dev);
/* display controller init */
ret = kirin_drm_kms_init(drm_dev, driver_data);
if (ret)
goto err_drm_dev_put;
ret = drm_dev_register(drm_dev, 0);
if (ret)
goto err_kms_cleanup;
drm_fbdev_dma_setup(drm_dev, 32);
return 0;
err_kms_cleanup:
kirin_drm_kms_cleanup(drm_dev);
err_drm_dev_put:
drm_dev_put(drm_dev);
dev_set_drvdata(dev, NULL);
return ret;
}
static void kirin_drm_unbind(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
drm_dev_unregister(drm_dev);
kirin_drm_kms_cleanup(drm_dev);
drm_dev_put(drm_dev);
dev_set_drvdata(dev, NULL);
}
static const struct component_master_ops kirin_drm_ops = {
.bind = kirin_drm_bind,
.unbind = kirin_drm_unbind,
};
static int kirin_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *np = dev->of_node;
struct component_match *match = NULL;
struct device_node *remote;
remote = of_graph_get_remote_node(np, 0, 0);
if (!remote)
return -ENODEV;
drm_of_component_match_add(dev, &match, component_compare_of, remote);
of_node_put(remote);
return component_master_add_with_match(dev, &kirin_drm_ops, match);
}
static void kirin_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &kirin_drm_ops);
}
static void kirin_drm_platform_shutdown(struct platform_device *pdev)
{
drm_atomic_helper_shutdown(platform_get_drvdata(pdev));
}
static const struct of_device_id kirin_drm_dt_ids[] = {
{ .compatible = "hisilicon,hi6220-ade",
.data = &ade_driver_data,
},
{ /* end node */ },
};
MODULE_DEVICE_TABLE(of, kirin_drm_dt_ids);
static struct platform_driver kirin_drm_platform_driver = {
.probe = kirin_drm_platform_probe,
.remove_new = kirin_drm_platform_remove,
.shutdown = kirin_drm_platform_shutdown,
.driver = {
.name = "kirin-drm",
.of_match_table = kirin_drm_dt_ids,
},
};
drm_module_platform_driver(kirin_drm_platform_driver);
MODULE_AUTHOR("Xinliang Liu <[email protected]>");
MODULE_AUTHOR("Xinliang Liu <[email protected]>");
MODULE_AUTHOR("Xinwei Kong <[email protected]>");
MODULE_DESCRIPTION("hisilicon Kirin SoCs' DRM master driver");
MODULE_LICENSE("GPL v2");
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