347 lines
8.0 KiB
C
347 lines
8.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* (C) COPYRIGHT 2018 ARM Limited. All rights reserved.
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* Author: James.Qian.Wang <james.qian.wang@arm.com>
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*
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*/
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#include <linux/io.h>
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#include <linux/iommu.h>
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#include <linux/of_device.h>
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#include <linux/of_graph.h>
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#include <linux/of_reserved_mem.h>
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#include <linux/platform_device.h>
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#include <linux/pm_runtime.h>
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#include <linux/dma-mapping.h>
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#ifdef CONFIG_DEBUG_FS
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#include <linux/debugfs.h>
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#include <linux/seq_file.h>
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#endif
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#include <drm/drm_print.h>
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#include "komeda_dev.h"
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static int komeda_register_show(struct seq_file *sf, void *x)
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{
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struct komeda_dev *mdev = sf->private;
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int i;
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seq_puts(sf, "\n====== Komeda register dump =========\n");
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pm_runtime_get_sync(mdev->dev);
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if (mdev->funcs->dump_register)
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mdev->funcs->dump_register(mdev, sf);
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for (i = 0; i < mdev->n_pipelines; i++)
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komeda_pipeline_dump_register(mdev->pipelines[i], sf);
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pm_runtime_put(mdev->dev);
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return 0;
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}
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DEFINE_SHOW_ATTRIBUTE(komeda_register);
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#ifdef CONFIG_DEBUG_FS
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static void komeda_debugfs_init(struct komeda_dev *mdev)
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{
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if (!debugfs_initialized())
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return;
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mdev->debugfs_root = debugfs_create_dir("komeda", NULL);
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debugfs_create_file("register", 0444, mdev->debugfs_root,
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mdev, &komeda_register_fops);
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debugfs_create_x16("err_verbosity", 0664, mdev->debugfs_root,
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&mdev->err_verbosity);
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}
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#endif
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static ssize_t
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core_id_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct komeda_dev *mdev = dev_to_mdev(dev);
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return sysfs_emit(buf, "0x%08x\n", mdev->chip.core_id);
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}
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static DEVICE_ATTR_RO(core_id);
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static ssize_t
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config_id_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct komeda_dev *mdev = dev_to_mdev(dev);
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struct komeda_pipeline *pipe = mdev->pipelines[0];
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union komeda_config_id config_id;
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int i;
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memset(&config_id, 0, sizeof(config_id));
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config_id.max_line_sz = pipe->layers[0]->hsize_in.end;
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config_id.n_pipelines = mdev->n_pipelines;
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config_id.n_scalers = pipe->n_scalers;
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config_id.n_layers = pipe->n_layers;
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config_id.n_richs = 0;
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for (i = 0; i < pipe->n_layers; i++) {
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if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)
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config_id.n_richs++;
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}
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return sysfs_emit(buf, "0x%08x\n", config_id.value);
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}
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static DEVICE_ATTR_RO(config_id);
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static ssize_t
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aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf)
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{
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struct komeda_dev *mdev = dev_to_mdev(dev);
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return sysfs_emit(buf, "%lu\n", clk_get_rate(mdev->aclk));
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}
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static DEVICE_ATTR_RO(aclk_hz);
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static struct attribute *komeda_sysfs_entries[] = {
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&dev_attr_core_id.attr,
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&dev_attr_config_id.attr,
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&dev_attr_aclk_hz.attr,
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NULL,
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};
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static struct attribute_group komeda_sysfs_attr_group = {
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.attrs = komeda_sysfs_entries,
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};
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static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe)
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{
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struct device_node *np = pipe->of_node;
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struct clk *clk;
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clk = of_clk_get_by_name(np, "pxclk");
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if (IS_ERR(clk)) {
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DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id);
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return PTR_ERR(clk);
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}
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pipe->pxlclk = clk;
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/* enum ports */
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pipe->of_output_links[0] =
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of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);
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pipe->of_output_links[1] =
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of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1);
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pipe->of_output_port =
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of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);
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pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];
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return 0;
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}
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static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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struct device_node *child, *np = dev->of_node;
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struct komeda_pipeline *pipe;
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u32 pipe_id = U32_MAX;
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int ret = -1;
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mdev->irq = platform_get_irq(pdev, 0);
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if (mdev->irq < 0) {
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DRM_ERROR("could not get IRQ number.\n");
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return mdev->irq;
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}
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/* Get the optional framebuffer memory resource */
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ret = of_reserved_mem_device_init(dev);
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if (ret && ret != -ENODEV)
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return ret;
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for_each_available_child_of_node(np, child) {
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if (of_node_name_eq(child, "pipeline")) {
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of_property_read_u32(child, "reg", &pipe_id);
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if (pipe_id >= mdev->n_pipelines) {
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DRM_WARN("Skip the redundant DT node: pipeline-%u.\n",
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pipe_id);
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continue;
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}
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mdev->pipelines[pipe_id]->of_node = of_node_get(child);
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}
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}
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for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) {
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pipe = mdev->pipelines[pipe_id];
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if (!pipe->of_node) {
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DRM_ERROR("Pipeline-%d doesn't have a DT node.\n",
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pipe->id);
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return -EINVAL;
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}
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ret = komeda_parse_pipe_dt(pipe);
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if (ret)
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return ret;
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}
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return 0;
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}
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struct komeda_dev *komeda_dev_create(struct device *dev)
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{
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struct platform_device *pdev = to_platform_device(dev);
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komeda_identify_func komeda_identify;
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struct komeda_dev *mdev;
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int err = 0;
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komeda_identify = of_device_get_match_data(dev);
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if (!komeda_identify)
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return ERR_PTR(-ENODEV);
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mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);
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if (!mdev)
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return ERR_PTR(-ENOMEM);
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mutex_init(&mdev->lock);
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mdev->dev = dev;
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mdev->reg_base = devm_platform_ioremap_resource(pdev, 0);
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if (IS_ERR(mdev->reg_base)) {
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DRM_ERROR("Map register space failed.\n");
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err = PTR_ERR(mdev->reg_base);
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mdev->reg_base = NULL;
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goto err_cleanup;
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}
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mdev->aclk = devm_clk_get(dev, "aclk");
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if (IS_ERR(mdev->aclk)) {
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DRM_ERROR("Get engine clk failed.\n");
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err = PTR_ERR(mdev->aclk);
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mdev->aclk = NULL;
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goto err_cleanup;
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}
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clk_prepare_enable(mdev->aclk);
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mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip);
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if (!mdev->funcs) {
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DRM_ERROR("Failed to identify the HW.\n");
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err = -ENODEV;
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goto disable_clk;
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}
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DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",
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MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),
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MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),
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MALIDP_CORE_ID_MINOR(mdev->chip.core_id));
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mdev->funcs->init_format_table(mdev);
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err = mdev->funcs->enum_resources(mdev);
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if (err) {
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DRM_ERROR("enumerate display resource failed.\n");
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goto disable_clk;
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}
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err = komeda_parse_dt(dev, mdev);
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if (err) {
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DRM_ERROR("parse device tree failed.\n");
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goto disable_clk;
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}
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err = komeda_assemble_pipelines(mdev);
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if (err) {
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DRM_ERROR("assemble display pipelines failed.\n");
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goto disable_clk;
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}
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dma_set_max_seg_size(dev, U32_MAX);
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mdev->iommu = iommu_get_domain_for_dev(mdev->dev);
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if (!mdev->iommu)
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DRM_INFO("continue without IOMMU support!\n");
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clk_disable_unprepare(mdev->aclk);
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err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);
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if (err) {
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DRM_ERROR("create sysfs group failed.\n");
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goto err_cleanup;
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}
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mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS;
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#ifdef CONFIG_DEBUG_FS
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komeda_debugfs_init(mdev);
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#endif
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return mdev;
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disable_clk:
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clk_disable_unprepare(mdev->aclk);
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err_cleanup:
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komeda_dev_destroy(mdev);
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return ERR_PTR(err);
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}
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void komeda_dev_destroy(struct komeda_dev *mdev)
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{
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struct device *dev = mdev->dev;
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const struct komeda_dev_funcs *funcs = mdev->funcs;
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int i;
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sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);
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#ifdef CONFIG_DEBUG_FS
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debugfs_remove_recursive(mdev->debugfs_root);
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#endif
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if (mdev->aclk)
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clk_prepare_enable(mdev->aclk);
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for (i = 0; i < mdev->n_pipelines; i++) {
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komeda_pipeline_destroy(mdev, mdev->pipelines[i]);
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mdev->pipelines[i] = NULL;
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}
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mdev->n_pipelines = 0;
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of_reserved_mem_device_release(dev);
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if (funcs && funcs->cleanup)
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funcs->cleanup(mdev);
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if (mdev->reg_base) {
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devm_iounmap(dev, mdev->reg_base);
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mdev->reg_base = NULL;
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}
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if (mdev->aclk) {
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clk_disable_unprepare(mdev->aclk);
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devm_clk_put(dev, mdev->aclk);
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mdev->aclk = NULL;
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}
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devm_kfree(dev, mdev);
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}
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int komeda_dev_resume(struct komeda_dev *mdev)
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{
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clk_prepare_enable(mdev->aclk);
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mdev->funcs->enable_irq(mdev);
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if (mdev->iommu && mdev->funcs->connect_iommu)
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if (mdev->funcs->connect_iommu(mdev))
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DRM_ERROR("connect iommu failed.\n");
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return 0;
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}
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int komeda_dev_suspend(struct komeda_dev *mdev)
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{
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if (mdev->iommu && mdev->funcs->disconnect_iommu)
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if (mdev->funcs->disconnect_iommu(mdev))
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DRM_ERROR("disconnect iommu failed.\n");
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mdev->funcs->disable_irq(mdev);
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clk_disable_unprepare(mdev->aclk);
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return 0;
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}
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