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/*
* Copyright (C) STMicroelectronics SA 2014
* Author: Benjamin Gaignard <benjamin.gaignard@st.com> for STMicroelectronics.
* License terms: GNU General Public License (GPL), version 2
*/
#include <drm/drmP.h>
#include <linux/component.h>
#include <linux/debugfs.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of_platform.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_gem_cma_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include "sti_drm_drv.h"
#include "sti_drm_crtc.h"
#define DRIVER_NAME "sti"
#define DRIVER_DESC "STMicroelectronics SoC DRM"
#define DRIVER_DATE "20140601"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
#define STI_MAX_FB_HEIGHT 4096
#define STI_MAX_FB_WIDTH 4096
static struct drm_mode_config_funcs sti_drm_mode_config_funcs = {
.fb_create = drm_fb_cma_create,
};
static void sti_drm_mode_config_init(struct drm_device *dev)
{
dev->mode_config.min_width = 0;
dev->mode_config.min_height = 0;
/*
* set max width and height as default value.
* this value would be used to check framebuffer size limitation
* at drm_mode_addfb().
*/
dev->mode_config.max_width = STI_MAX_FB_HEIGHT;
dev->mode_config.max_height = STI_MAX_FB_WIDTH;
dev->mode_config.funcs = &sti_drm_mode_config_funcs;
}
static int sti_drm_load(struct drm_device *dev, unsigned long flags)
{
struct sti_drm_private *private;
int ret;
private = kzalloc(sizeof(struct sti_drm_private), GFP_KERNEL);
if (!private) {
DRM_ERROR("Failed to allocate private\n");
return -ENOMEM;
}
dev->dev_private = (void *)private;
private->drm_dev = dev;
drm_mode_config_init(dev);
drm_kms_helper_poll_init(dev);
sti_drm_mode_config_init(dev);
ret = component_bind_all(dev->dev, dev);
if (ret)
return ret;
drm_helper_disable_unused_functions(dev);
#ifdef CONFIG_DRM_STI_FBDEV
drm_fbdev_cma_init(dev, 32,
dev->mode_config.num_crtc,
dev->mode_config.num_connector);
#endif
return 0;
}
static const struct file_operations sti_drm_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = drm_gem_cma_mmap,
.poll = drm_poll,
.read = drm_read,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.release = drm_release,
};
static struct dma_buf *sti_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 struct drm_driver sti_drm_driver = {
.driver_features = DRIVER_HAVE_IRQ | DRIVER_MODESET |
DRIVER_GEM | DRIVER_PRIME,
.load = sti_drm_load,
.gem_free_object = drm_gem_cma_free_object,
.gem_vm_ops = &drm_gem_cma_vm_ops,
.dumb_create = drm_gem_cma_dumb_create,
.dumb_map_offset = drm_gem_cma_dumb_map_offset,
.dumb_destroy = drm_gem_dumb_destroy,
.fops = &sti_drm_driver_fops,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = sti_drm_crtc_enable_vblank,
.disable_vblank = sti_drm_crtc_disable_vblank,
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
.gem_prime_export = sti_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 = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
};
static int compare_of(struct device *dev, void *data)
{
return dev->of_node == data;
}
static int sti_drm_bind(struct device *dev)
{
return drm_platform_init(&sti_drm_driver, to_platform_device(dev));
}
static void sti_drm_unbind(struct device *dev)
{
drm_put_dev(dev_get_drvdata(dev));
}
static const struct component_master_ops sti_drm_ops = {
.bind = sti_drm_bind,
.unbind = sti_drm_unbind,
};
static int sti_drm_master_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->parent->of_node;
struct device_node *child_np;
struct component_match *match = NULL;
dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
child_np = of_get_next_available_child(node, NULL);
while (child_np) {
component_match_add(dev, &match, compare_of, child_np);
of_node_put(child_np);
child_np = of_get_next_available_child(node, child_np);
}
return component_master_add_with_match(dev, &sti_drm_ops, match);
}
static int sti_drm_master_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &sti_drm_ops);
return 0;
}
static struct platform_driver sti_drm_master_driver = {
.probe = sti_drm_master_probe,
.remove = sti_drm_master_remove,
.driver = {
.name = DRIVER_NAME "__master",
},
};
static int sti_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct device_node *node = dev->of_node;
struct platform_device *master;
of_platform_populate(node, NULL, NULL, dev);
platform_driver_register(&sti_drm_master_driver);
master = platform_device_register_resndata(dev,
DRIVER_NAME "__master", -1,
NULL, 0, NULL, 0);
if (IS_ERR(master))
return PTR_ERR(master);
platform_set_drvdata(pdev, master);
return 0;
}
static int sti_drm_platform_remove(struct platform_device *pdev)
{
struct platform_device *master = platform_get_drvdata(pdev);
of_platform_depopulate(&pdev->dev);
platform_device_unregister(master);
platform_driver_unregister(&sti_drm_master_driver);
return 0;
}
static const struct of_device_id sti_drm_dt_ids[] = {
{ .compatible = "st,sti-display-subsystem", },
{ /* end node */ },
};
MODULE_DEVICE_TABLE(of, sti_drm_dt_ids);
static struct platform_driver sti_drm_platform_driver = {
.probe = sti_drm_platform_probe,
.remove = sti_drm_platform_remove,
.driver = {
.name = DRIVER_NAME,
.of_match_table = sti_drm_dt_ids,
},
};
module_platform_driver(sti_drm_platform_driver);
MODULE_AUTHOR("Benjamin Gaignard <benjamin.gaignard@st.com>");
MODULE_DESCRIPTION("STMicroelectronics SoC DRM driver");
MODULE_LICENSE("GPL");
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