- 根目录:
- drivers
- gpu
- drm
- rockchip
- rockchip_drm_drv.c
/*
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
* Author:Mark Yao <mark.yao@rock-chips.com>
*
* based on exynos_drm_drv.c
*
* This software is licensed under the terms of the GNU General Public
* License version 2, as published by the Free Software Foundation, and
* may be copied, distributed, and modified under those terms.
*
* 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 <asm/dma-iommu.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
#include <linux/dma-mapping.h>
#include <linux/pm_runtime.h>
#include <linux/of_graph.h>
#include <linux/component.h>
#include "rockchip_drm_drv.h"
#include "rockchip_drm_fb.h"
#include "rockchip_drm_fbdev.h"
#include "rockchip_drm_gem.h"
#define DRIVER_NAME "rockchip"
#define DRIVER_DESC "RockChip Soc DRM"
#define DRIVER_DATE "20140818"
#define DRIVER_MAJOR 1
#define DRIVER_MINOR 0
/*
* Attach a (component) device to the shared drm dma mapping from master drm
* device. This is used by the VOPs to map GEM buffers to a common DMA
* mapping.
*/
int rockchip_drm_dma_attach_device(struct drm_device *drm_dev,
struct device *dev)
{
struct dma_iommu_mapping *mapping = drm_dev->dev->archdata.mapping;
int ret;
ret = dma_set_coherent_mask(dev, DMA_BIT_MASK(32));
if (ret)
return ret;
dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
return arm_iommu_attach_device(dev, mapping);
}
EXPORT_SYMBOL_GPL(rockchip_drm_dma_attach_device);
void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
struct device *dev)
{
arm_iommu_detach_device(dev);
}
EXPORT_SYMBOL_GPL(rockchip_drm_dma_detach_device);
int rockchip_register_crtc_funcs(struct drm_device *dev,
const struct rockchip_crtc_funcs *crtc_funcs,
int pipe)
{
struct rockchip_drm_private *priv = dev->dev_private;
if (pipe > ROCKCHIP_MAX_CRTC)
return -EINVAL;
priv->crtc_funcs[pipe] = crtc_funcs;
return 0;
}
EXPORT_SYMBOL_GPL(rockchip_register_crtc_funcs);
void rockchip_unregister_crtc_funcs(struct drm_device *dev, int pipe)
{
struct rockchip_drm_private *priv = dev->dev_private;
if (pipe > ROCKCHIP_MAX_CRTC)
return;
priv->crtc_funcs[pipe] = NULL;
}
EXPORT_SYMBOL_GPL(rockchip_unregister_crtc_funcs);
static struct drm_crtc *rockchip_crtc_from_pipe(struct drm_device *drm,
int pipe)
{
struct drm_crtc *crtc;
int i = 0;
list_for_each_entry(crtc, &drm->mode_config.crtc_list, head)
if (i++ == pipe)
return crtc;
return NULL;
}
static int rockchip_drm_crtc_enable_vblank(struct drm_device *dev, int pipe)
{
struct rockchip_drm_private *priv = dev->dev_private;
struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
if (crtc && priv->crtc_funcs[pipe] &&
priv->crtc_funcs[pipe]->enable_vblank)
return priv->crtc_funcs[pipe]->enable_vblank(crtc);
return 0;
}
static void rockchip_drm_crtc_disable_vblank(struct drm_device *dev, int pipe)
{
struct rockchip_drm_private *priv = dev->dev_private;
struct drm_crtc *crtc = rockchip_crtc_from_pipe(dev, pipe);
if (crtc && priv->crtc_funcs[pipe] &&
priv->crtc_funcs[pipe]->enable_vblank)
priv->crtc_funcs[pipe]->disable_vblank(crtc);
}
static int rockchip_drm_load(struct drm_device *drm_dev, unsigned long flags)
{
struct rockchip_drm_private *private;
struct dma_iommu_mapping *mapping;
struct device *dev = drm_dev->dev;
struct drm_connector *connector;
int ret;
private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
if (!private)
return -ENOMEM;
drm_dev->dev_private = private;
drm_mode_config_init(drm_dev);
rockchip_drm_mode_config_init(drm_dev);
dev->dma_parms = devm_kzalloc(dev, sizeof(*dev->dma_parms),
GFP_KERNEL);
if (!dev->dma_parms) {
ret = -ENOMEM;
goto err_config_cleanup;
}
/* TODO(djkurtz): fetch the mapping start/size from somewhere */
mapping = arm_iommu_create_mapping(&platform_bus_type, 0x00000000,
SZ_2G);
if (IS_ERR(mapping)) {
ret = PTR_ERR(mapping);
goto err_config_cleanup;
}
ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32));
if (ret)
goto err_release_mapping;
dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
ret = arm_iommu_attach_device(dev, mapping);
if (ret)
goto err_release_mapping;
/* Try to bind all sub drivers. */
ret = component_bind_all(dev, drm_dev);
if (ret)
goto err_detach_device;
/*
* All components are now added, we can publish the connector sysfs
* entries to userspace. This will generate hotplug events and so
* userspace will expect to be able to access DRM at this point.
*/
list_for_each_entry(connector, &drm_dev->mode_config.connector_list,
head) {
ret = drm_connector_register(connector);
if (ret) {
dev_err(drm_dev->dev,
"[CONNECTOR:%d:%s] drm_connector_register failed: %d\n",
connector->base.id,
connector->name, ret);
goto err_unbind;
}
}
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(drm_dev);
/*
* enable drm irq mode.
* - with irq_enabled = true, we can use the vblank feature.
*/
drm_dev->irq_enabled = true;
ret = drm_vblank_init(drm_dev, ROCKCHIP_MAX_CRTC);
if (ret)
goto err_kms_helper_poll_fini;
/*
* with vblank_disable_allowed = true, vblank interrupt will be disabled
* by drm timer once a current process gives up ownership of
* vblank event.(after drm_vblank_put function is called)
*/
drm_dev->vblank_disable_allowed = true;
ret = rockchip_drm_fbdev_init(drm_dev);
if (ret)
goto err_vblank_cleanup;
return 0;
err_vblank_cleanup:
drm_vblank_cleanup(drm_dev);
err_kms_helper_poll_fini:
drm_kms_helper_poll_fini(drm_dev);
err_unbind:
component_unbind_all(dev, drm_dev);
err_detach_device:
arm_iommu_detach_device(dev);
err_release_mapping:
arm_iommu_release_mapping(dev->archdata.mapping);
err_config_cleanup:
drm_mode_config_cleanup(drm_dev);
drm_dev->dev_private = NULL;
return ret;
}
static int rockchip_drm_unload(struct drm_device *drm_dev)
{
struct device *dev = drm_dev->dev;
rockchip_drm_fbdev_fini(drm_dev);
drm_vblank_cleanup(drm_dev);
drm_kms_helper_poll_fini(drm_dev);
component_unbind_all(dev, drm_dev);
arm_iommu_detach_device(dev);
arm_iommu_release_mapping(dev->archdata.mapping);
drm_mode_config_cleanup(drm_dev);
drm_dev->dev_private = NULL;
return 0;
}
void rockchip_drm_lastclose(struct drm_device *dev)
{
struct rockchip_drm_private *priv = dev->dev_private;
drm_fb_helper_restore_fbdev_mode_unlocked(&priv->fbdev_helper);
}
static const struct file_operations rockchip_drm_driver_fops = {
.owner = THIS_MODULE,
.open = drm_open,
.mmap = rockchip_gem_mmap,
.poll = drm_poll,
.read = drm_read,
.unlocked_ioctl = drm_ioctl,
#ifdef CONFIG_COMPAT
.compat_ioctl = drm_compat_ioctl,
#endif
.release = drm_release,
};
const struct vm_operations_struct rockchip_drm_vm_ops = {
.open = drm_gem_vm_open,
.close = drm_gem_vm_close,
};
static struct drm_driver rockchip_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
.load = rockchip_drm_load,
.unload = rockchip_drm_unload,
.lastclose = rockchip_drm_lastclose,
.get_vblank_counter = drm_vblank_count,
.enable_vblank = rockchip_drm_crtc_enable_vblank,
.disable_vblank = rockchip_drm_crtc_disable_vblank,
.gem_vm_ops = &rockchip_drm_vm_ops,
.gem_free_object = rockchip_gem_free_object,
.dumb_create = rockchip_gem_dumb_create,
.dumb_map_offset = rockchip_gem_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_import = drm_gem_prime_import,
.gem_prime_export = drm_gem_prime_export,
.gem_prime_get_sg_table = rockchip_gem_prime_get_sg_table,
.gem_prime_vmap = rockchip_gem_prime_vmap,
.gem_prime_vunmap = rockchip_gem_prime_vunmap,
.gem_prime_mmap = rockchip_gem_mmap_buf,
.fops = &rockchip_drm_driver_fops,
.name = DRIVER_NAME,
.desc = DRIVER_DESC,
.date = DRIVER_DATE,
.major = DRIVER_MAJOR,
.minor = DRIVER_MINOR,
};
#ifdef CONFIG_PM_SLEEP
static int rockchip_drm_sys_suspend(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct drm_connector *connector;
if (!drm)
return 0;
drm_modeset_lock_all(drm);
list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
int old_dpms = connector->dpms;
if (connector->funcs->dpms)
connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
/* Set the old mode back to the connector for resume */
connector->dpms = old_dpms;
}
drm_modeset_unlock_all(drm);
return 0;
}
static int rockchip_drm_sys_resume(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
struct drm_connector *connector;
enum drm_connector_status status;
bool changed = false;
if (!drm)
return 0;
drm_modeset_lock_all(drm);
list_for_each_entry(connector, &drm->mode_config.connector_list, head) {
int desired_mode = connector->dpms;
/*
* at suspend time, we save dpms to connector->dpms,
* restore the old_dpms, and at current time, the connector
* dpms status must be DRM_MODE_DPMS_OFF.
*/
connector->dpms = DRM_MODE_DPMS_OFF;
/*
* If the connector has been disconnected during suspend,
* disconnect it from the encoder and leave it off. We'll notify
* userspace at the end.
*/
if (desired_mode == DRM_MODE_DPMS_ON) {
status = connector->funcs->detect(connector, true);
if (status == connector_status_disconnected) {
connector->encoder = NULL;
connector->status = status;
changed = true;
continue;
}
}
if (connector->funcs->dpms)
connector->funcs->dpms(connector, desired_mode);
}
drm_modeset_unlock_all(drm);
drm_helper_resume_force_mode(drm);
if (changed)
drm_kms_helper_hotplug_event(drm);
return 0;
}
#endif
static const struct dev_pm_ops rockchip_drm_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
rockchip_drm_sys_resume)
};
/*
* @node: device tree node containing encoder input ports
* @encoder: drm_encoder
*/
int rockchip_drm_encoder_get_mux_id(struct device_node *node,
struct drm_encoder *encoder)
{
struct device_node *ep;
struct drm_crtc *crtc = encoder->crtc;
struct of_endpoint endpoint;
struct device_node *port;
int ret;
if (!node || !crtc)
return -EINVAL;
for_each_endpoint_of_node(node, ep) {
port = of_graph_get_remote_port(ep);
of_node_put(port);
if (port == crtc->port) {
ret = of_graph_parse_endpoint(ep, &endpoint);
of_node_put(ep);
return ret ?: endpoint.id;
}
}
return -EINVAL;
}
EXPORT_SYMBOL_GPL(rockchip_drm_encoder_get_mux_id);
static int compare_of(struct device *dev, void *data)
{
struct device_node *np = data;
return dev->of_node == np;
}
static void rockchip_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 %s is not available\n",
remote->full_name);
of_node_put(remote);
continue;
}
component_match_add(dev, match, compare_of, remote);
of_node_put(remote);
}
}
static int rockchip_drm_bind(struct device *dev)
{
struct drm_device *drm;
int ret;
drm = drm_dev_alloc(&rockchip_drm_driver, dev);
if (!drm)
return -ENOMEM;
ret = drm_dev_set_unique(drm, "%s", dev_name(dev));
if (ret)
goto err_free;
ret = drm_dev_register(drm, 0);
if (ret)
goto err_free;
dev_set_drvdata(dev, drm);
return 0;
err_free:
drm_dev_unref(drm);
return ret;
}
static void rockchip_drm_unbind(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
drm_dev_unregister(drm);
drm_dev_unref(drm);
dev_set_drvdata(dev, NULL);
}
static const struct component_master_ops rockchip_drm_ops = {
.bind = rockchip_drm_bind,
.unbind = rockchip_drm_unbind,
};
static int rockchip_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct component_match *match = NULL;
struct device_node *np = dev->of_node;
struct device_node *port;
int i;
if (!np)
return -ENODEV;
/*
* Bind the crtc ports first, so that
* drm_of_find_possible_crtcs called from encoder .bind callbacks
* works as expected.
*/
for (i = 0;; i++) {
port = of_parse_phandle(np, "ports", i);
if (!port)
break;
if (!of_device_is_available(port->parent)) {
of_node_put(port);
continue;
}
component_match_add(dev, &match, compare_of, port->parent);
of_node_put(port);
}
if (i == 0) {
dev_err(dev, "missing 'ports' property\n");
return -ENODEV;
}
if (!match) {
dev_err(dev, "No available vop found for display-subsystem.\n");
return -ENODEV;
}
/*
* For each bound crtc, bind the encoders attached to its
* remote endpoint.
*/
for (i = 0;; i++) {
port = of_parse_phandle(np, "ports", i);
if (!port)
break;
if (!of_device_is_available(port->parent)) {
of_node_put(port);
continue;
}
rockchip_add_endpoints(dev, &match, port);
of_node_put(port);
}
return component_master_add_with_match(dev, &rockchip_drm_ops, match);
}
static int rockchip_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &rockchip_drm_ops);
return 0;
}
static const struct of_device_id rockchip_drm_dt_ids[] = {
{ .compatible = "rockchip,display-subsystem", },
{ /* sentinel */ },
};
MODULE_DEVICE_TABLE(of, rockchip_drm_dt_ids);
static struct platform_driver rockchip_drm_platform_driver = {
.probe = rockchip_drm_platform_probe,
.remove = rockchip_drm_platform_remove,
.driver = {
.owner = THIS_MODULE,
.name = "rockchip-drm",
.of_match_table = rockchip_drm_dt_ids,
.pm = &rockchip_drm_pm_ops,
},
};
module_platform_driver(rockchip_drm_platform_driver);
MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
MODULE_LICENSE("GPL v2");