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/*
* Hisilicon Terminal SoCs drm driver
*
* Copyright (c) 2014-2015 Hisilicon Limited.
* Author:
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
*/
#include <linux/of_platform.h>
#include <drm/drmP.h>
#include <drm/drm_fb_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include "hisi_drm_ade.h"
#include "hisi_drm_dsi.h"
#include "hisi_drm_fb.h"
#ifdef CONFIG_DRM_HISI_FBDEV
#include "hisi_drm_fbdev.h"
#endif
#include "hisi_drm_drv.h"
static int hisi_drm_sub_drivers_init(struct drm_device *drm_dev)
{
int ret;
struct device_node *child_np;
struct platform_device *pdev;
struct device *parent_dev = &drm_dev->platformdev->dev;
struct device_node *parent_np = parent_dev->of_node;
/*
* First add devices and then initialize drivers
*/
for_each_available_child_of_node(parent_np, child_np) {
/* skip nodes without compatible property */
if (!of_find_property(child_np, "compatible", NULL))
continue;
pdev = of_platform_device_create(child_np, NULL, parent_dev);
if (!pdev) {
ret = -ENODEV;
DRM_ERROR("fail to create plat dev for node:%s\n",
of_node_full_name(child_np));
return ret;
}
/* let drm_dev as platform data,
so that sub drivers can access it */
pdev->dev.platform_data = drm_dev;
}
#if 0
/* fbdev initialization should be put at last position */
#ifdef CONFIG_DRM_HISI_FBDEV
ret = hisi_drm_fbdev_init(drm_dev);
if (ret) {
DRM_ERROR("failed to initialize fbdev\n");
goto err_fbdev_init;
}
#endif
#endif
return 0;
#ifdef CONFIG_DRM_HISI_FBDEV
/* err_fbdev_init:*/
hisi_drm_dsi_exit();
#endif
return ret;
}
static void hisi_drm_sub_drivers_exit(struct drm_device *drm_dev)
{
struct device *dev = &drm_dev->platformdev->dev;
of_platform_depopulate(dev);
#ifdef CONFIG_DRM_HISI_FBDEV
hisi_drm_fbdev_exit(drm_dev);
#endif
}
static int hisi_drm_unload(struct drm_device *drm_dev)
{
struct hisi_drm_private *private = drm_dev->dev_private;
drm_mode_config_cleanup(drm_dev);
hisi_drm_sub_drivers_exit(drm_dev);
kfree(private);
drm_dev->dev_private = NULL;
return 0;
}
static int hisi_drm_load(struct drm_device *drm_dev, unsigned long flags)
{
int ret;
struct hisi_drm_private *private;
/* debug setting
drm_debug = DRM_UT_DRIVER|DRM_UT_KMS|DRM_UT_CORE|DRM_UT_PRIME; */
DRM_DEBUG_DRIVER("enter.\n");
private = kzalloc(sizeof(struct hisi_drm_private), GFP_KERNEL);
if (!private)
return -ENOMEM;
drm_dev->dev_private = private;
dev_set_drvdata(drm_dev->dev, drm_dev);
/* drm_dev->mode_config initialization */
drm_mode_config_init(drm_dev);
hisi_drm_mode_config_init(drm_dev);
/* sub drivers initialization */
ret = hisi_drm_sub_drivers_init(drm_dev);
if (ret) {
DRM_ERROR("failed to initialize sub drivers\n");
goto err_sub_drivers_init;
}
DRM_DEBUG_DRIVER("exit successfully.\n");
return 0;
err_sub_drivers_init:
drm_mode_config_cleanup(drm_dev);
return ret;
}
static const struct file_operations hisi_drm_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.release = drm_release,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.poll = drm_poll,
.read = drm_read,
.llseek = no_llseek,
.mmap = drm_gem_cma_mmap,
};
static struct dma_buf *hisi_drm_gem_prime_export(struct drm_device *dev,
struct drm_gem_object *obj,
int flags)
{
/* we want to be able to write in mmapped buffer */
flags |= O_RDWR;
return drm_gem_prime_export(dev, obj, flags);
}
static int hisi_drm_gem_cma_dumb_create(struct drm_file *file,
struct drm_device *dev,
struct drm_mode_create_dumb *args)
{
int min_pitch = DIV_ROUND_UP(args->width * args->bpp, 8);
/* FIXME: let need pitch 8 bytes alignment? */
args->pitch = roundup(min_pitch, 8);
return drm_gem_cma_dumb_create(file, dev, args);
}
static struct drm_driver hisi_drm_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME,
.load = hisi_drm_load,
.unload = hisi_drm_unload,
.fops = &hisi_drm_fops,
.set_busid = drm_platform_set_busid,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = hisi_drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = hisi_drm_gem_prime_export,
.gem_prime_import = drm_gem_prime_import,
.gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table,
.gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table,
.gem_prime_vmap = drm_gem_cma_prime_vmap,
.gem_prime_vunmap = drm_gem_cma_prime_vunmap,
.gem_prime_mmap = drm_gem_cma_prime_mmap,
.name = "hisi",
.desc = "Hisilicon Terminal SoCs DRM Driver",
.date = "20141224",
.major = 1,
.minor = 0,
};
/* -----------------------------------------------------------------------------
* Platform driver
*/
static int hisi_drm_probe(struct platform_device *pdev)
{
dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
return drm_platform_init(&hisi_drm_driver, pdev);
}
static int hisi_drm_remove(struct platform_device *pdev)
{
drm_put_dev(platform_get_drvdata(pdev));
return 0;
}
static struct of_device_id hisi_drm_of_match[] = {
{ .compatible = "hisilicon,hi6220-drm" }, /* hi6220 SoC drm */
{}
};
MODULE_DEVICE_TABLE(of, hisi_drm_of_match);
static struct platform_driver hisi_drm_platform_driver = {
.probe = hisi_drm_probe,
.remove = hisi_drm_remove,
.driver = {
.owner = THIS_MODULE,
.name = "hisi-drm",
.of_match_table = hisi_drm_of_match,
},
};
module_platform_driver(hisi_drm_platform_driver);
MODULE_AUTHOR("Xinliang Liu <z.liuxinliang@huawei.com>");
MODULE_DESCRIPTION("HISI DRM Driver");
MODULE_LICENSE("GPL");
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