![Noralf Trønnes](/assets/img/avatar_default.png)
This driver can use drm_fb_helper_lastclose() as its .lastclose callback. It can also use drm_fb_helper_output_poll_changed() as its .output_poll_changed callback. Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Acked-by: Russell King <rmk+kernel@armlinux.org.uk> Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: https://patchwork.freedesktop.org/patch/msgid/20171205182504.41923-4-noralf@tronnes.org
336 lines
8.1 KiB
C
336 lines
8.1 KiB
C
/*
|
|
* Copyright (C) 2012 Russell King
|
|
*
|
|
* 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/clk.h>
|
|
#include <linux/component.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_graph.h>
|
|
#include <drm/drm_crtc_helper.h>
|
|
#include <drm/drm_fb_helper.h>
|
|
#include <drm/drm_of.h>
|
|
#include "armada_crtc.h"
|
|
#include "armada_drm.h"
|
|
#include "armada_gem.h"
|
|
#include "armada_hw.h"
|
|
#include <drm/armada_drm.h>
|
|
#include "armada_ioctlP.h"
|
|
|
|
static void armada_drm_unref_work(struct work_struct *work)
|
|
{
|
|
struct armada_private *priv =
|
|
container_of(work, struct armada_private, fb_unref_work);
|
|
struct drm_framebuffer *fb;
|
|
|
|
while (kfifo_get(&priv->fb_unref, &fb))
|
|
drm_framebuffer_put(fb);
|
|
}
|
|
|
|
/* Must be called with dev->event_lock held */
|
|
void __armada_drm_queue_unref_work(struct drm_device *dev,
|
|
struct drm_framebuffer *fb)
|
|
{
|
|
struct armada_private *priv = dev->dev_private;
|
|
|
|
WARN_ON(!kfifo_put(&priv->fb_unref, fb));
|
|
schedule_work(&priv->fb_unref_work);
|
|
}
|
|
|
|
void armada_drm_queue_unref_work(struct drm_device *dev,
|
|
struct drm_framebuffer *fb)
|
|
{
|
|
unsigned long flags;
|
|
|
|
spin_lock_irqsave(&dev->event_lock, flags);
|
|
__armada_drm_queue_unref_work(dev, fb);
|
|
spin_unlock_irqrestore(&dev->event_lock, flags);
|
|
}
|
|
|
|
static struct drm_ioctl_desc armada_ioctls[] = {
|
|
DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
|
|
DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
|
|
DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
|
|
};
|
|
|
|
DEFINE_DRM_GEM_FOPS(armada_drm_fops);
|
|
|
|
static struct drm_driver armada_drm_driver = {
|
|
.lastclose = drm_fb_helper_lastclose,
|
|
.gem_free_object_unlocked = armada_gem_free_object,
|
|
.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
|
|
.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
|
|
.gem_prime_export = armada_gem_prime_export,
|
|
.gem_prime_import = armada_gem_prime_import,
|
|
.dumb_create = armada_gem_dumb_create,
|
|
.gem_vm_ops = &armada_gem_vm_ops,
|
|
.major = 1,
|
|
.minor = 0,
|
|
.name = "armada-drm",
|
|
.desc = "Armada SoC DRM",
|
|
.date = "20120730",
|
|
.driver_features = DRIVER_GEM | DRIVER_MODESET |
|
|
DRIVER_PRIME,
|
|
.ioctls = armada_ioctls,
|
|
.fops = &armada_drm_fops,
|
|
};
|
|
|
|
static int armada_drm_bind(struct device *dev)
|
|
{
|
|
struct armada_private *priv;
|
|
struct resource *mem = NULL;
|
|
int ret, n;
|
|
|
|
for (n = 0; ; n++) {
|
|
struct resource *r = platform_get_resource(to_platform_device(dev),
|
|
IORESOURCE_MEM, n);
|
|
if (!r)
|
|
break;
|
|
|
|
/* Resources above 64K are graphics memory */
|
|
if (resource_size(r) > SZ_64K)
|
|
mem = r;
|
|
else
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (!mem)
|
|
return -ENXIO;
|
|
|
|
if (!devm_request_mem_region(dev, mem->start, resource_size(mem),
|
|
"armada-drm"))
|
|
return -EBUSY;
|
|
|
|
priv = kzalloc(sizeof(*priv), GFP_KERNEL);
|
|
if (!priv)
|
|
return -ENOMEM;
|
|
|
|
/*
|
|
* The drm_device structure must be at the start of
|
|
* armada_private for drm_dev_unref() to work correctly.
|
|
*/
|
|
BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);
|
|
|
|
ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
|
|
if (ret) {
|
|
dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
|
|
__func__, ret);
|
|
kfree(priv);
|
|
return ret;
|
|
}
|
|
|
|
priv->drm.dev_private = priv;
|
|
|
|
dev_set_drvdata(dev, &priv->drm);
|
|
|
|
INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
|
|
INIT_KFIFO(priv->fb_unref);
|
|
|
|
/* Mode setting support */
|
|
drm_mode_config_init(&priv->drm);
|
|
priv->drm.mode_config.min_width = 320;
|
|
priv->drm.mode_config.min_height = 200;
|
|
|
|
/*
|
|
* With vscale enabled, the maximum width is 1920 due to the
|
|
* 1920 by 3 lines RAM
|
|
*/
|
|
priv->drm.mode_config.max_width = 1920;
|
|
priv->drm.mode_config.max_height = 2048;
|
|
|
|
priv->drm.mode_config.preferred_depth = 24;
|
|
priv->drm.mode_config.funcs = &armada_drm_mode_config_funcs;
|
|
drm_mm_init(&priv->linear, mem->start, resource_size(mem));
|
|
mutex_init(&priv->linear_lock);
|
|
|
|
ret = component_bind_all(dev, &priv->drm);
|
|
if (ret)
|
|
goto err_kms;
|
|
|
|
ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
|
|
if (ret)
|
|
goto err_comp;
|
|
|
|
priv->drm.irq_enabled = true;
|
|
|
|
ret = armada_fbdev_init(&priv->drm);
|
|
if (ret)
|
|
goto err_comp;
|
|
|
|
drm_kms_helper_poll_init(&priv->drm);
|
|
|
|
ret = drm_dev_register(&priv->drm, 0);
|
|
if (ret)
|
|
goto err_poll;
|
|
|
|
#ifdef CONFIG_DEBUG_FS
|
|
armada_drm_debugfs_init(priv->drm.primary);
|
|
#endif
|
|
|
|
return 0;
|
|
|
|
err_poll:
|
|
drm_kms_helper_poll_fini(&priv->drm);
|
|
armada_fbdev_fini(&priv->drm);
|
|
err_comp:
|
|
component_unbind_all(dev, &priv->drm);
|
|
err_kms:
|
|
drm_mode_config_cleanup(&priv->drm);
|
|
drm_mm_takedown(&priv->linear);
|
|
flush_work(&priv->fb_unref_work);
|
|
drm_dev_unref(&priv->drm);
|
|
return ret;
|
|
}
|
|
|
|
static void armada_drm_unbind(struct device *dev)
|
|
{
|
|
struct drm_device *drm = dev_get_drvdata(dev);
|
|
struct armada_private *priv = drm->dev_private;
|
|
|
|
drm_kms_helper_poll_fini(&priv->drm);
|
|
armada_fbdev_fini(&priv->drm);
|
|
|
|
drm_dev_unregister(&priv->drm);
|
|
|
|
component_unbind_all(dev, &priv->drm);
|
|
|
|
drm_mode_config_cleanup(&priv->drm);
|
|
drm_mm_takedown(&priv->linear);
|
|
flush_work(&priv->fb_unref_work);
|
|
|
|
drm_dev_unref(&priv->drm);
|
|
}
|
|
|
|
static int compare_of(struct device *dev, void *data)
|
|
{
|
|
return dev->of_node == data;
|
|
}
|
|
|
|
static int compare_dev_name(struct device *dev, void *data)
|
|
{
|
|
const char *name = data;
|
|
return !strcmp(dev_name(dev), name);
|
|
}
|
|
|
|
static void armada_add_endpoints(struct device *dev,
|
|
struct component_match **match, struct device_node *port)
|
|
{
|
|
struct device_node *ep, *remote;
|
|
|
|
for_each_child_of_node(port, ep) {
|
|
remote = of_graph_get_remote_port_parent(ep);
|
|
if (!remote || !of_device_is_available(remote)) {
|
|
of_node_put(remote);
|
|
continue;
|
|
} else if (!of_device_is_available(remote->parent)) {
|
|
dev_warn(dev, "parent device of %pOF is not available\n",
|
|
remote);
|
|
of_node_put(remote);
|
|
continue;
|
|
}
|
|
|
|
drm_of_component_match_add(dev, match, compare_of, remote);
|
|
of_node_put(remote);
|
|
}
|
|
}
|
|
|
|
static const struct component_master_ops armada_master_ops = {
|
|
.bind = armada_drm_bind,
|
|
.unbind = armada_drm_unbind,
|
|
};
|
|
|
|
static int armada_drm_probe(struct platform_device *pdev)
|
|
{
|
|
struct component_match *match = NULL;
|
|
struct device *dev = &pdev->dev;
|
|
int ret;
|
|
|
|
ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
|
|
if (ret != -EINVAL)
|
|
return ret;
|
|
|
|
if (dev->platform_data) {
|
|
char **devices = dev->platform_data;
|
|
struct device_node *port;
|
|
struct device *d;
|
|
int i;
|
|
|
|
for (i = 0; devices[i]; i++)
|
|
component_match_add(dev, &match, compare_dev_name,
|
|
devices[i]);
|
|
|
|
if (i == 0) {
|
|
dev_err(dev, "missing 'ports' property\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
for (i = 0; devices[i]; i++) {
|
|
d = bus_find_device_by_name(&platform_bus_type, NULL,
|
|
devices[i]);
|
|
if (d && d->of_node) {
|
|
for_each_child_of_node(d->of_node, port)
|
|
armada_add_endpoints(dev, &match, port);
|
|
}
|
|
put_device(d);
|
|
}
|
|
}
|
|
|
|
return component_master_add_with_match(&pdev->dev, &armada_master_ops,
|
|
match);
|
|
}
|
|
|
|
static int armada_drm_remove(struct platform_device *pdev)
|
|
{
|
|
component_master_del(&pdev->dev, &armada_master_ops);
|
|
return 0;
|
|
}
|
|
|
|
static const struct platform_device_id armada_drm_platform_ids[] = {
|
|
{
|
|
.name = "armada-drm",
|
|
}, {
|
|
.name = "armada-510-drm",
|
|
},
|
|
{ },
|
|
};
|
|
MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
|
|
|
|
static struct platform_driver armada_drm_platform_driver = {
|
|
.probe = armada_drm_probe,
|
|
.remove = armada_drm_remove,
|
|
.driver = {
|
|
.name = "armada-drm",
|
|
},
|
|
.id_table = armada_drm_platform_ids,
|
|
};
|
|
|
|
static int __init armada_drm_init(void)
|
|
{
|
|
int ret;
|
|
|
|
armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
|
|
|
|
ret = platform_driver_register(&armada_lcd_platform_driver);
|
|
if (ret)
|
|
return ret;
|
|
ret = platform_driver_register(&armada_drm_platform_driver);
|
|
if (ret)
|
|
platform_driver_unregister(&armada_lcd_platform_driver);
|
|
return ret;
|
|
}
|
|
module_init(armada_drm_init);
|
|
|
|
static void __exit armada_drm_exit(void)
|
|
{
|
|
platform_driver_unregister(&armada_drm_platform_driver);
|
|
platform_driver_unregister(&armada_lcd_platform_driver);
|
|
}
|
|
module_exit(armada_drm_exit);
|
|
|
|
MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
|
|
MODULE_DESCRIPTION("Armada DRM Driver");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:armada-drm");
|