// SPDX-License-Identifier: GPL-2.0
/*
* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
* Author: James.Qian.Wang <james.qian.wang@arm.com>
*
*/
#include <linux/io.h>
#include <linux/iommu.h>
#include <linux/of_device.h>
#include <linux/of_graph.h>
#include <linux/of_reserved_mem.h>
#include <linux/platform_device.h>
#include <linux/dma-mapping.h>
#ifdef [31mCONFIG_DEBUG_FS[0m
#include <linux/debugfs.h>
#include <linux/seq_file.h>
#endif
#include <drm/drm_print.h>
#include "komeda_dev.h"
static int komeda_register_show(struct seq_file *sf, void *x)
{
struct komeda_dev *mdev = sf->private;
int i;
if (mdev->funcs->dump_register)
mdev->funcs->dump_register(mdev, sf);
for (i = 0; i < mdev->n_pipelines; i++)
komeda_pipeline_dump_register(mdev->pipelines[i], sf);
return 0;
}
static int komeda_register_open(struct inode *inode, struct file *filp)
{
return single_open(filp, komeda_register_show, inode->i_private);
}
static const struct file_operations komeda_register_fops = {
.owner = THIS_MODULE,
.open = komeda_register_open,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
#ifdef [31mCONFIG_DEBUG_FS[0m
static void komeda_debugfs_init(struct komeda_dev *mdev)
{
if (!debugfs_initialized())
return;
mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
debugfs_create_file("register", 0444, mdev->debugfs_root,
mdev, &komeda_register_fops);
}
#endif
static ssize_t
core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct komeda_dev *mdev = dev_to_mdev(dev);
return snprintf(buf, PAGE_SIZE, "0x%08x\n", mdev->chip.core_id);
}
static DEVICE_ATTR_RO(core_id);
static ssize_t
config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
{
struct komeda_dev *mdev = dev_to_mdev(dev);
struct komeda_pipeline *pipe = mdev->pipelines[0];
union komeda_config_id config_id;
int i;
memset(&config_id, 0, sizeof(config_id));
config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
config_id.n_pipelines = mdev->n_pipelines;
config_id.n_scalers = pipe->n_scalers;
config_id.n_layers = pipe->n_layers;
config_id.n_richs = 0;
for (i = 0; i < pipe->n_layers; i++) {
if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
config_id.n_richs++;
}
return snprintf(buf, PAGE_SIZE, "0x%08x\n", config_id.value);
}
static DEVICE_ATTR_RO(config_id);
static struct attribute *komeda_sysfs_entries[] = {
&dev_attr_core_id.attr,
&dev_attr_config_id.attr,
NULL,
};
static struct attribute_group komeda_sysfs_attr_group = {
.attrs = komeda_sysfs_entries,
};
static int komeda_parse_pipe_dt(struct komeda_dev *mdev, struct device_node *np)
{
struct komeda_pipeline *pipe;
struct clk *clk;
u32 pipe_id;
int ret = 0;
ret = of_property_read_u32(np, "reg", &pipe_id);
if (ret != 0 || pipe_id >= mdev->n_pipelines)
return -EINVAL;
pipe = mdev->pipelines[pipe_id];
clk = of_clk_get_by_name(np, "pxclk");
if (IS_ERR(clk)) {
DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe_id);
return PTR_ERR(clk);
}
pipe->pxlclk = clk;
/* enum ports */
pipe->of_output_links[0] =
of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
pipe->of_output_links[1] =
of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1);
pipe->of_output_port =
of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];
pipe->of_node = of_node_get(np);
return 0;
}
static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
{
struct platform_device *pdev = to_platform_device(dev);
struct device_node *child, *np = dev->of_node;
int ret;
mdev->irq = platform_get_irq(pdev, 0);
if (mdev->irq < 0) {
DRM_ERROR("could not get IRQ number.\n");
return mdev->irq;
}
/* Get the optional framebuffer memory resource */
ret = of_reserved_mem_device_init(dev);
if (ret && ret != -ENODEV)
return ret;
ret = 0;
for_each_available_child_of_node(np, child) {
if (of_node_cmp(child->name, "pipeline") == 0) {
ret = komeda_parse_pipe_dt(mdev, child);
if (ret) {
DRM_ERROR("parse pipeline dt error!\n");
of_node_put(child);
break;
}
}
}
return ret;
}
struct komeda_dev *komeda_dev_create(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
const struct komeda_product_data *product;
struct komeda_dev *mdev;
struct resource *io_res;
int err = 0;
product = of_device_get_match_data(dev);
if (!product)
return ERR_PTR(-ENODEV);
io_res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!io_res) {
DRM_ERROR("No registers defined.\n");
return ERR_PTR(-ENODEV);
}
mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
if (!mdev)
return ERR_PTR(-ENOMEM);
mutex_init(&mdev->lock);
mdev->dev = dev;
mdev->reg_base = devm_ioremap_resource(dev, io_res);
if (IS_ERR(mdev->reg_base)) {
DRM_ERROR("Map register space failed.\n");
err = PTR_ERR(mdev->reg_base);
mdev->reg_base = NULL;
goto err_cleanup;
}
mdev->aclk = devm_clk_get(dev, "aclk");
if (IS_ERR(mdev->aclk)) {
DRM_ERROR("Get engine clk failed.\n");
err = PTR_ERR(mdev->aclk);
mdev->aclk = NULL;
goto err_cleanup;
}
clk_prepare_enable(mdev->aclk);
mdev->funcs = product->identify(mdev->reg_base, &mdev->chip);
if (!komeda_product_match(mdev, product->product_id)) {
DRM_ERROR("DT configured %x mismatch with real HW %x.\n",
product->product_id,
MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id));
err = -ENODEV;
goto err_cleanup;
}
DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
mdev->funcs->init_format_table(mdev);
err = mdev->funcs->enum_resources(mdev);
if (err) {
DRM_ERROR("enumerate display resource failed.\n");
goto err_cleanup;
}
err = komeda_parse_dt(dev, mdev);
if (err) {
DRM_ERROR("parse device tree failed.\n");
goto err_cleanup;
}
err = komeda_assemble_pipelines(mdev);
if (err) {
DRM_ERROR("assemble display pipelines failed.\n");
goto err_cleanup;
}
dev->dma_parms = &mdev->dma_parms;
dma_set_max_seg_size(dev, DMA_BIT_MASK(32));
mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
if (!mdev->iommu)
DRM_INFO("continue without IOMMU support!\n");
if (mdev->iommu && mdev->funcs->connect_iommu) {
err = mdev->funcs->connect_iommu(mdev);
if (err) {
mdev->iommu = NULL;
goto err_cleanup;
}
}
err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
if (err) {
DRM_ERROR("create sysfs group failed.\n");
goto err_cleanup;
}
#ifdef [31mCONFIG_DEBUG_FS[0m
komeda_debugfs_init(mdev);
#endif
return mdev;
err_cleanup:
komeda_dev_destroy(mdev);
return ERR_PTR(err);
}
void komeda_dev_destroy(struct komeda_dev *mdev)
{
struct device *dev = mdev->dev;
const struct komeda_dev_funcs *funcs = mdev->funcs;
int i;
sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
#ifdef [31mCONFIG_DEBUG_FS[0m
debugfs_remove_recursive(mdev->debugfs_root);
#endif
if (mdev->iommu && mdev->funcs->disconnect_iommu)
mdev->funcs->disconnect_iommu(mdev);
mdev->iommu = NULL;
for (i = 0; i < mdev->n_pipelines; i++) {
komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
mdev->pipelines[i] = NULL;
}
mdev->n_pipelines = 0;
of_reserved_mem_device_release(dev);
if (funcs && funcs->cleanup)
funcs->cleanup(mdev);
if (mdev->reg_base) {
devm_iounmap(dev, mdev->reg_base);
mdev->reg_base = NULL;
}
if (mdev->aclk) {
clk_disable_unprepare(mdev->aclk);
devm_clk_put(dev, mdev->aclk);
mdev->aclk = NULL;
}
devm_kfree(dev, mdev);
}