| // 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/of_device.h> |
| #include <linux/of_graph.h> |
| #include <linux/platform_device.h> |
| #include <linux/dma-mapping.h> |
| #ifdef CONFIG_DEBUG_FS |
| #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 CONFIG_DEBUG_FS |
| static void komeda_debugfs_init(struct komeda_dev *mdev) |
| { |
| if (!debugfs_initialized()) |
| return; |
| |
| mdev->debugfs_root = debugfs_create_dir("komeda", NULL); |
| if (IS_ERR_OR_NULL(mdev->debugfs_root)) |
| return; |
| |
| 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, "aclk"); |
| if (IS_ERR(clk)) { |
| DRM_ERROR("get aclk for pipeline %d failed!\n", pipe_id); |
| return PTR_ERR(clk); |
| } |
| pipe->aclk = clk; |
| |
| 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_dev = |
| of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0); |
| pipe->of_output_port = |
| of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT); |
| |
| pipe->of_node = 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; |
| struct clk *clk; |
| int ret; |
| |
| clk = devm_clk_get(dev, "mclk"); |
| if (IS_ERR(clk)) |
| return PTR_ERR(clk); |
| |
| mdev->mclk = clk; |
| mdev->irq = platform_get_irq(pdev, 0); |
| if (mdev->irq < 0) { |
| DRM_ERROR("could not get IRQ number.\n"); |
| return mdev->irq; |
| } |
| |
| 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->pclk = devm_clk_get(dev, "pclk"); |
| if (IS_ERR(mdev->pclk)) { |
| DRM_ERROR("Get APB clk failed.\n"); |
| err = PTR_ERR(mdev->pclk); |
| mdev->pclk = NULL; |
| goto err_cleanup; |
| } |
| |
| /* Enable APB clock to access the registers */ |
| clk_prepare_enable(mdev->pclk); |
| |
| 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)); |
| |
| err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group); |
| if (err) { |
| DRM_ERROR("create sysfs group failed.\n"); |
| goto err_cleanup; |
| } |
| |
| #ifdef CONFIG_DEBUG_FS |
| 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 CONFIG_DEBUG_FS |
| debugfs_remove_recursive(mdev->debugfs_root); |
| #endif |
| |
| for (i = 0; i < mdev->n_pipelines; i++) { |
| komeda_pipeline_destroy(mdev, mdev->pipelines[i]); |
| mdev->pipelines[i] = NULL; |
| } |
| |
| mdev->n_pipelines = 0; |
| |
| if (funcs && funcs->cleanup) |
| funcs->cleanup(mdev); |
| |
| if (mdev->reg_base) { |
| devm_iounmap(dev, mdev->reg_base); |
| mdev->reg_base = NULL; |
| } |
| |
| if (mdev->mclk) { |
| devm_clk_put(dev, mdev->mclk); |
| mdev->mclk = NULL; |
| } |
| |
| if (mdev->pclk) { |
| clk_disable_unprepare(mdev->pclk); |
| devm_clk_put(dev, mdev->pclk); |
| mdev->pclk = NULL; |
| } |
| |
| devm_kfree(dev, mdev); |
| } |
