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1// SPDX-License-Identifier: GPL-2.02/*3 * (C) COPYRIGHT 2018 ARM Limited. All rights reserved.4 * Author: James.Qian.Wang <james.qian.wang@arm.com>5 *6 */7#include <linux/io.h>8#include <linux/iommu.h>9#include <linux/of.h>10#include <linux/of_graph.h>11#include <linux/of_reserved_mem.h>12#include <linux/platform_device.h>13#include <linux/pm_runtime.h>14#include <linux/dma-mapping.h>15#include <linux/debugfs.h>16#include <linux/seq_file.h>17 18#include <drm/drm_print.h>19 20#include "komeda_dev.h"21 22static int komeda_register_show(struct seq_file *sf, void *x)23{24 struct komeda_dev *mdev = sf->private;25 int i;26 27 seq_puts(sf, "\n====== Komeda register dump =========\n");28 29 pm_runtime_get_sync(mdev->dev);30 31 if (mdev->funcs->dump_register)32 mdev->funcs->dump_register(mdev, sf);33 34 for (i = 0; i < mdev->n_pipelines; i++)35 komeda_pipeline_dump_register(mdev->pipelines[i], sf);36 37 pm_runtime_put(mdev->dev);38 39 return 0;40}41 42DEFINE_SHOW_ATTRIBUTE(komeda_register);43 44static void komeda_debugfs_init(struct komeda_dev *mdev)45{46 if (!debugfs_initialized())47 return;48 49 mdev->debugfs_root = debugfs_create_dir("komeda", NULL);50 debugfs_create_file("register", 0444, mdev->debugfs_root,51 mdev, &komeda_register_fops);52 debugfs_create_x16("err_verbosity", 0664, mdev->debugfs_root,53 &mdev->err_verbosity);54}55 56static ssize_t57core_id_show(struct device *dev, struct device_attribute *attr, char *buf)58{59 struct komeda_dev *mdev = dev_to_mdev(dev);60 61 return sysfs_emit(buf, "0x%08x\n", mdev->chip.core_id);62}63static DEVICE_ATTR_RO(core_id);64 65static ssize_t66config_id_show(struct device *dev, struct device_attribute *attr, char *buf)67{68 struct komeda_dev *mdev = dev_to_mdev(dev);69 struct komeda_pipeline *pipe = mdev->pipelines[0];70 union komeda_config_id config_id;71 int i;72 73 memset(&config_id, 0, sizeof(config_id));74 75 config_id.max_line_sz = pipe->layers[0]->hsize_in.end;76 config_id.n_pipelines = mdev->n_pipelines;77 config_id.n_scalers = pipe->n_scalers;78 config_id.n_layers = pipe->n_layers;79 config_id.n_richs = 0;80 for (i = 0; i < pipe->n_layers; i++) {81 if (pipe->layers[i]->layer_type == KOMEDA_FMT_RICH_LAYER)82 config_id.n_richs++;83 }84 return sysfs_emit(buf, "0x%08x\n", config_id.value);85}86static DEVICE_ATTR_RO(config_id);87 88static ssize_t89aclk_hz_show(struct device *dev, struct device_attribute *attr, char *buf)90{91 struct komeda_dev *mdev = dev_to_mdev(dev);92 93 return sysfs_emit(buf, "%lu\n", clk_get_rate(mdev->aclk));94}95static DEVICE_ATTR_RO(aclk_hz);96 97static struct attribute *komeda_sysfs_entries[] = {98 &dev_attr_core_id.attr,99 &dev_attr_config_id.attr,100 &dev_attr_aclk_hz.attr,101 NULL,102};103 104static struct attribute_group komeda_sysfs_attr_group = {105 .attrs = komeda_sysfs_entries,106};107 108static int komeda_parse_pipe_dt(struct komeda_pipeline *pipe)109{110 struct device_node *np = pipe->of_node;111 struct clk *clk;112 113 clk = of_clk_get_by_name(np, "pxclk");114 if (IS_ERR(clk)) {115 DRM_ERROR("get pxclk for pipeline %d failed!\n", pipe->id);116 return PTR_ERR(clk);117 }118 pipe->pxlclk = clk;119 120 /* enum ports */121 pipe->of_output_links[0] =122 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 0);123 pipe->of_output_links[1] =124 of_graph_get_remote_node(np, KOMEDA_OF_PORT_OUTPUT, 1);125 pipe->of_output_port =126 of_graph_get_port_by_id(np, KOMEDA_OF_PORT_OUTPUT);127 128 pipe->dual_link = pipe->of_output_links[0] && pipe->of_output_links[1];129 130 return 0;131}132 133static int komeda_parse_dt(struct device *dev, struct komeda_dev *mdev)134{135 struct platform_device *pdev = to_platform_device(dev);136 struct device_node *child, *np = dev->of_node;137 struct komeda_pipeline *pipe;138 u32 pipe_id = U32_MAX;139 int ret = -1;140 141 mdev->irq = platform_get_irq(pdev, 0);142 if (mdev->irq < 0) {143 DRM_ERROR("could not get IRQ number.\n");144 return mdev->irq;145 }146 147 /* Get the optional framebuffer memory resource */148 ret = of_reserved_mem_device_init(dev);149 if (ret && ret != -ENODEV)150 return ret;151 152 for_each_available_child_of_node(np, child) {153 if (of_node_name_eq(child, "pipeline")) {154 of_property_read_u32(child, "reg", &pipe_id);155 if (pipe_id >= mdev->n_pipelines) {156 DRM_WARN("Skip the redundant DT node: pipeline-%u.\n",157 pipe_id);158 continue;159 }160 mdev->pipelines[pipe_id]->of_node = of_node_get(child);161 }162 }163 164 for (pipe_id = 0; pipe_id < mdev->n_pipelines; pipe_id++) {165 pipe = mdev->pipelines[pipe_id];166 167 if (!pipe->of_node) {168 DRM_ERROR("Pipeline-%d doesn't have a DT node.\n",169 pipe->id);170 return -EINVAL;171 }172 ret = komeda_parse_pipe_dt(pipe);173 if (ret)174 return ret;175 }176 177 return 0;178}179 180struct komeda_dev *komeda_dev_create(struct device *dev)181{182 struct platform_device *pdev = to_platform_device(dev);183 komeda_identify_func komeda_identify;184 struct komeda_dev *mdev;185 int err = 0;186 187 komeda_identify = of_device_get_match_data(dev);188 if (!komeda_identify)189 return ERR_PTR(-ENODEV);190 191 mdev = devm_kzalloc(dev, sizeof(*mdev), GFP_KERNEL);192 if (!mdev)193 return ERR_PTR(-ENOMEM);194 195 mutex_init(&mdev->lock);196 197 mdev->dev = dev;198 mdev->reg_base = devm_platform_ioremap_resource(pdev, 0);199 if (IS_ERR(mdev->reg_base)) {200 DRM_ERROR("Map register space failed.\n");201 err = PTR_ERR(mdev->reg_base);202 mdev->reg_base = NULL;203 goto err_cleanup;204 }205 206 mdev->aclk = devm_clk_get(dev, "aclk");207 if (IS_ERR(mdev->aclk)) {208 DRM_ERROR("Get engine clk failed.\n");209 err = PTR_ERR(mdev->aclk);210 mdev->aclk = NULL;211 goto err_cleanup;212 }213 214 clk_prepare_enable(mdev->aclk);215 216 mdev->funcs = komeda_identify(mdev->reg_base, &mdev->chip);217 if (!mdev->funcs) {218 DRM_ERROR("Failed to identify the HW.\n");219 err = -ENODEV;220 goto disable_clk;221 }222 223 DRM_INFO("Found ARM Mali-D%x version r%dp%d\n",224 MALIDP_CORE_ID_PRODUCT_ID(mdev->chip.core_id),225 MALIDP_CORE_ID_MAJOR(mdev->chip.core_id),226 MALIDP_CORE_ID_MINOR(mdev->chip.core_id));227 228 mdev->funcs->init_format_table(mdev);229 230 err = mdev->funcs->enum_resources(mdev);231 if (err) {232 DRM_ERROR("enumerate display resource failed.\n");233 goto disable_clk;234 }235 236 err = komeda_parse_dt(dev, mdev);237 if (err) {238 DRM_ERROR("parse device tree failed.\n");239 goto disable_clk;240 }241 242 err = komeda_assemble_pipelines(mdev);243 if (err) {244 DRM_ERROR("assemble display pipelines failed.\n");245 goto disable_clk;246 }247 248 dma_set_max_seg_size(dev, U32_MAX);249 250 mdev->iommu = iommu_get_domain_for_dev(mdev->dev);251 if (!mdev->iommu)252 DRM_INFO("continue without IOMMU support!\n");253 254 clk_disable_unprepare(mdev->aclk);255 256 err = sysfs_create_group(&dev->kobj, &komeda_sysfs_attr_group);257 if (err) {258 DRM_ERROR("create sysfs group failed.\n");259 goto err_cleanup;260 }261 262 mdev->err_verbosity = KOMEDA_DEV_PRINT_ERR_EVENTS;263 264 komeda_debugfs_init(mdev);265 266 return mdev;267 268disable_clk:269 clk_disable_unprepare(mdev->aclk);270err_cleanup:271 komeda_dev_destroy(mdev);272 return ERR_PTR(err);273}274 275void komeda_dev_destroy(struct komeda_dev *mdev)276{277 struct device *dev = mdev->dev;278 const struct komeda_dev_funcs *funcs = mdev->funcs;279 int i;280 281 sysfs_remove_group(&dev->kobj, &komeda_sysfs_attr_group);282 283 debugfs_remove_recursive(mdev->debugfs_root);284 285 if (mdev->aclk)286 clk_prepare_enable(mdev->aclk);287 288 for (i = 0; i < mdev->n_pipelines; i++) {289 komeda_pipeline_destroy(mdev, mdev->pipelines[i]);290 mdev->pipelines[i] = NULL;291 }292 293 mdev->n_pipelines = 0;294 295 of_reserved_mem_device_release(dev);296 297 if (funcs && funcs->cleanup)298 funcs->cleanup(mdev);299 300 if (mdev->reg_base) {301 devm_iounmap(dev, mdev->reg_base);302 mdev->reg_base = NULL;303 }304 305 if (mdev->aclk) {306 clk_disable_unprepare(mdev->aclk);307 devm_clk_put(dev, mdev->aclk);308 mdev->aclk = NULL;309 }310 311 devm_kfree(dev, mdev);312}313 314int komeda_dev_resume(struct komeda_dev *mdev)315{316 clk_prepare_enable(mdev->aclk);317 318 mdev->funcs->enable_irq(mdev);319 320 if (mdev->iommu && mdev->funcs->connect_iommu)321 if (mdev->funcs->connect_iommu(mdev))322 DRM_ERROR("connect iommu failed.\n");323 324 return 0;325}326 327int komeda_dev_suspend(struct komeda_dev *mdev)328{329 if (mdev->iommu && mdev->funcs->disconnect_iommu)330 if (mdev->funcs->disconnect_iommu(mdev))331 DRM_ERROR("disconnect iommu failed.\n");332 333 mdev->funcs->disable_irq(mdev);334 335 clk_disable_unprepare(mdev->aclk);336 337 return 0;338}339