blob: ab55d71325500d84461c7bd1c1ceb1db12cd6222 [file] [log] [blame]
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (C) Fuzhou Rockchip Electronics Co.Ltd
* Author:Mark Yao <mark.yao@rock-chips.com>
*
* based on exynos_drm_drv.c
*/
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/component.h>
#include <linux/console.h>
#include <linux/iommu.h>
#include <drm/drm_aperture.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_generic.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_of.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_vblank.h>
#if defined(CONFIG_ARM_DMA_USE_IOMMU)
#include <asm/dma-iommu.h>
#else
#define arm_iommu_detach_device(...) ({ })
#define arm_iommu_release_mapping(...) ({ })
#define to_dma_iommu_mapping(dev) NULL
#endif
#include "rockchip_drm_drv.h"
#include "rockchip_drm_fb.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
static const struct drm_driver rockchip_drm_driver;
/*
* 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 rockchip_drm_private *private = drm_dev->dev_private;
int ret;
if (!private->domain)
return 0;
if (IS_ENABLED(CONFIG_ARM_DMA_USE_IOMMU)) {
struct dma_iommu_mapping *mapping = to_dma_iommu_mapping(dev);
if (mapping) {
arm_iommu_detach_device(dev);
arm_iommu_release_mapping(mapping);
}
}
ret = iommu_attach_device(private->domain, dev);
if (ret) {
DRM_DEV_ERROR(dev, "Failed to attach iommu device\n");
return ret;
}
return 0;
}
void rockchip_drm_dma_detach_device(struct drm_device *drm_dev,
struct device *dev)
{
struct rockchip_drm_private *private = drm_dev->dev_private;
if (!private->domain)
return;
iommu_detach_device(private->domain, dev);
}
void rockchip_drm_dma_init_device(struct drm_device *drm_dev,
struct device *dev)
{
struct rockchip_drm_private *private = drm_dev->dev_private;
if (!device_iommu_mapped(dev))
private->iommu_dev = ERR_PTR(-ENODEV);
else if (!private->iommu_dev)
private->iommu_dev = dev;
}
static int rockchip_drm_init_iommu(struct drm_device *drm_dev)
{
struct rockchip_drm_private *private = drm_dev->dev_private;
struct iommu_domain_geometry *geometry;
u64 start, end;
if (IS_ERR_OR_NULL(private->iommu_dev))
return 0;
private->domain = iommu_domain_alloc(private->iommu_dev->bus);
if (!private->domain)
return -ENOMEM;
geometry = &private->domain->geometry;
start = geometry->aperture_start;
end = geometry->aperture_end;
DRM_DEBUG("IOMMU context initialized (aperture: %#llx-%#llx)\n",
start, end);
drm_mm_init(&private->mm, start, end - start + 1);
mutex_init(&private->mm_lock);
return 0;
}
static void rockchip_iommu_cleanup(struct drm_device *drm_dev)
{
struct rockchip_drm_private *private = drm_dev->dev_private;
if (!private->domain)
return;
drm_mm_takedown(&private->mm);
iommu_domain_free(private->domain);
}
static int rockchip_drm_bind(struct device *dev)
{
struct drm_device *drm_dev;
struct rockchip_drm_private *private;
int ret;
/* Remove existing drivers that may own the framebuffer memory. */
ret = drm_aperture_remove_framebuffers(&rockchip_drm_driver);
if (ret) {
DRM_DEV_ERROR(dev,
"Failed to remove existing framebuffers - %d.\n",
ret);
return ret;
}
drm_dev = drm_dev_alloc(&rockchip_drm_driver, dev);
if (IS_ERR(drm_dev))
return PTR_ERR(drm_dev);
dev_set_drvdata(dev, drm_dev);
private = devm_kzalloc(drm_dev->dev, sizeof(*private), GFP_KERNEL);
if (!private) {
ret = -ENOMEM;
goto err_free;
}
drm_dev->dev_private = private;
ret = drmm_mode_config_init(drm_dev);
if (ret)
goto err_free;
rockchip_drm_mode_config_init(drm_dev);
/* Try to bind all sub drivers. */
ret = component_bind_all(dev, drm_dev);
if (ret)
goto err_free;
ret = rockchip_drm_init_iommu(drm_dev);
if (ret)
goto err_unbind_all;
ret = drm_vblank_init(drm_dev, drm_dev->mode_config.num_crtc);
if (ret)
goto err_iommu_cleanup;
drm_mode_config_reset(drm_dev);
/* init kms poll for handling hpd */
drm_kms_helper_poll_init(drm_dev);
ret = drm_dev_register(drm_dev, 0);
if (ret)
goto err_kms_helper_poll_fini;
drm_fbdev_generic_setup(drm_dev, 0);
return 0;
err_kms_helper_poll_fini:
drm_kms_helper_poll_fini(drm_dev);
err_iommu_cleanup:
rockchip_iommu_cleanup(drm_dev);
err_unbind_all:
component_unbind_all(dev, drm_dev);
err_free:
drm_dev_put(drm_dev);
return ret;
}
static void rockchip_drm_unbind(struct device *dev)
{
struct drm_device *drm_dev = dev_get_drvdata(dev);
drm_dev_unregister(drm_dev);
drm_kms_helper_poll_fini(drm_dev);
drm_atomic_helper_shutdown(drm_dev);
component_unbind_all(dev, drm_dev);
rockchip_iommu_cleanup(drm_dev);
drm_dev_put(drm_dev);
}
DEFINE_DRM_GEM_FOPS(rockchip_drm_driver_fops);
static const struct drm_driver rockchip_drm_driver = {
.driver_features = DRIVER_MODESET | DRIVER_GEM | DRIVER_ATOMIC,
.dumb_create = rockchip_gem_dumb_create,
.gem_prime_import_sg_table = rockchip_gem_prime_import_sg_table,
.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);
return drm_mode_config_helper_suspend(drm);
}
static int rockchip_drm_sys_resume(struct device *dev)
{
struct drm_device *drm = dev_get_drvdata(dev);
return drm_mode_config_helper_resume(drm);
}
#endif
static const struct dev_pm_ops rockchip_drm_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(rockchip_drm_sys_suspend,
rockchip_drm_sys_resume)
};
#define MAX_ROCKCHIP_SUB_DRIVERS 16
static struct platform_driver *rockchip_sub_drivers[MAX_ROCKCHIP_SUB_DRIVERS];
static int num_rockchip_sub_drivers;
/*
* Get the endpoint id of the remote endpoint of the given encoder. This
* information is used by the VOP2 driver to identify the encoder.
*
* @rkencoder: The encoder to get the remote endpoint id from
* @np: The encoder device node
* @port: The number of the port leading to the VOP2
* @reg: The endpoint number leading to the VOP2
*/
int rockchip_drm_encoder_set_crtc_endpoint_id(struct rockchip_encoder *rkencoder,
struct device_node *np, int port, int reg)
{
struct of_endpoint ep;
struct device_node *en, *ren;
int ret;
en = of_graph_get_endpoint_by_regs(np, port, reg);
if (!en)
return -ENOENT;
ren = of_graph_get_remote_endpoint(en);
if (!ren)
return -ENOENT;
ret = of_graph_parse_endpoint(ren, &ep);
if (ret)
return ret;
rkencoder->crtc_endpoint_id = ep.id;
return 0;
}
/*
* Check if a vop endpoint is leading to a rockchip subdriver or bridge.
* Should be called from the component bind stage of the drivers
* to ensure that all subdrivers are probed.
*
* @ep: endpoint of a rockchip vop
*
* returns true if subdriver, false if external bridge and -ENODEV
* if remote port does not contain a device.
*/
int rockchip_drm_endpoint_is_subdriver(struct device_node *ep)
{
struct device_node *node = of_graph_get_remote_port_parent(ep);
struct platform_device *pdev;
struct device_driver *drv;
int i;
if (!node)
return -ENODEV;
/* status disabled will prevent creation of platform-devices */
if (!of_device_is_available(node)) {
of_node_put(node);
return -ENODEV;
}
pdev = of_find_device_by_node(node);
of_node_put(node);
/* enabled non-platform-devices can immediately return here */
if (!pdev)
return false;
/*
* All rockchip subdrivers have probed at this point, so
* any device not having a driver now is an external bridge.
*/
drv = pdev->dev.driver;
if (!drv) {
platform_device_put(pdev);
return false;
}
for (i = 0; i < num_rockchip_sub_drivers; i++) {
if (rockchip_sub_drivers[i] == to_platform_driver(drv)) {
platform_device_put(pdev);
return true;
}
}
platform_device_put(pdev);
return false;
}
static void rockchip_drm_match_remove(struct device *dev)
{
struct device_link *link;
list_for_each_entry(link, &dev->links.consumers, s_node)
device_link_del(link);
}
static struct component_match *rockchip_drm_match_add(struct device *dev)
{
struct component_match *match = NULL;
int i;
for (i = 0; i < num_rockchip_sub_drivers; i++) {
struct platform_driver *drv = rockchip_sub_drivers[i];
struct device *p = NULL, *d;
do {
d = platform_find_device_by_driver(p, &drv->driver);
put_device(p);
p = d;
if (!d)
break;
device_link_add(dev, d, DL_FLAG_STATELESS);
component_match_add(dev, &match, component_compare_dev, d);
} while (true);
}
if (IS_ERR(match))
rockchip_drm_match_remove(dev);
return match ?: ERR_PTR(-ENODEV);
}
static const struct component_master_ops rockchip_drm_ops = {
.bind = rockchip_drm_bind,
.unbind = rockchip_drm_unbind,
};
static int rockchip_drm_platform_of_probe(struct device *dev)
{
struct device_node *np = dev->of_node;
struct device_node *port;
bool found = false;
int i;
if (!np)
return -ENODEV;
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;
}
found = true;
of_node_put(port);
}
if (i == 0) {
DRM_DEV_ERROR(dev, "missing 'ports' property\n");
return -ENODEV;
}
if (!found) {
DRM_DEV_ERROR(dev,
"No available vop found for display-subsystem.\n");
return -ENODEV;
}
return 0;
}
static int rockchip_drm_platform_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct component_match *match = NULL;
int ret;
ret = rockchip_drm_platform_of_probe(dev);
if (ret)
return ret;
match = rockchip_drm_match_add(dev);
if (IS_ERR(match))
return PTR_ERR(match);
ret = component_master_add_with_match(dev, &rockchip_drm_ops, match);
if (ret < 0) {
rockchip_drm_match_remove(dev);
return ret;
}
return 0;
}
static void rockchip_drm_platform_remove(struct platform_device *pdev)
{
component_master_del(&pdev->dev, &rockchip_drm_ops);
rockchip_drm_match_remove(&pdev->dev);
}
static void rockchip_drm_platform_shutdown(struct platform_device *pdev)
{
struct drm_device *drm = platform_get_drvdata(pdev);
if (drm)
drm_atomic_helper_shutdown(drm);
}
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_new = rockchip_drm_platform_remove,
.shutdown = rockchip_drm_platform_shutdown,
.driver = {
.name = "rockchip-drm",
.of_match_table = rockchip_drm_dt_ids,
.pm = &rockchip_drm_pm_ops,
},
};
#define ADD_ROCKCHIP_SUB_DRIVER(drv, cond) { \
if (IS_ENABLED(cond) && \
!WARN_ON(num_rockchip_sub_drivers >= MAX_ROCKCHIP_SUB_DRIVERS)) \
rockchip_sub_drivers[num_rockchip_sub_drivers++] = &drv; \
}
static int __init rockchip_drm_init(void)
{
int ret;
if (drm_firmware_drivers_only())
return -ENODEV;
num_rockchip_sub_drivers = 0;
ADD_ROCKCHIP_SUB_DRIVER(vop_platform_driver, CONFIG_ROCKCHIP_VOP);
ADD_ROCKCHIP_SUB_DRIVER(vop2_platform_driver, CONFIG_ROCKCHIP_VOP2);
ADD_ROCKCHIP_SUB_DRIVER(rockchip_lvds_driver,
CONFIG_ROCKCHIP_LVDS);
ADD_ROCKCHIP_SUB_DRIVER(rockchip_dp_driver,
CONFIG_ROCKCHIP_ANALOGIX_DP);
ADD_ROCKCHIP_SUB_DRIVER(cdn_dp_driver, CONFIG_ROCKCHIP_CDN_DP);
ADD_ROCKCHIP_SUB_DRIVER(dw_hdmi_rockchip_pltfm_driver,
CONFIG_ROCKCHIP_DW_HDMI);
ADD_ROCKCHIP_SUB_DRIVER(dw_mipi_dsi_rockchip_driver,
CONFIG_ROCKCHIP_DW_MIPI_DSI);
ADD_ROCKCHIP_SUB_DRIVER(inno_hdmi_driver, CONFIG_ROCKCHIP_INNO_HDMI);
ADD_ROCKCHIP_SUB_DRIVER(rk3066_hdmi_driver,
CONFIG_ROCKCHIP_RK3066_HDMI);
ret = platform_register_drivers(rockchip_sub_drivers,
num_rockchip_sub_drivers);
if (ret)
return ret;
ret = platform_driver_register(&rockchip_drm_platform_driver);
if (ret)
goto err_unreg_drivers;
return 0;
err_unreg_drivers:
platform_unregister_drivers(rockchip_sub_drivers,
num_rockchip_sub_drivers);
return ret;
}
static void __exit rockchip_drm_fini(void)
{
platform_driver_unregister(&rockchip_drm_platform_driver);
platform_unregister_drivers(rockchip_sub_drivers,
num_rockchip_sub_drivers);
}
module_init(rockchip_drm_init);
module_exit(rockchip_drm_fini);
MODULE_AUTHOR("Mark Yao <mark.yao@rock-chips.com>");
MODULE_DESCRIPTION("ROCKCHIP DRM Driver");
MODULE_LICENSE("GPL v2");