drivers/media/platform/mtk-mdp/mtk_mdp_core.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015-2016 MediaTek Inc.
   4  * Author: Houlong Wei <houlong.wei@mediatek.com>
   5  *         Ming Hsiu Tsai <minghsiu.tsai@mediatek.com>
   6  */
   7
   8 #include <linux/clk.h>
   9 #include <linux/device.h>
  10 #include <linux/errno.h>
  11 #include <linux/interrupt.h>
  12 #include <linux/kernel.h>
  13 #include <linux/module.h>
  14 #include <linux/of.h>
  15 #include <linux/of_address.h>
  16 #include <linux/of_platform.h>
  17 #include <linux/platform_device.h>
  18 #include <linux/pm_runtime.h>
  19 #include <linux/workqueue.h>
  20 #include <soc/mediatek/smi.h>
  21
  22 #include "mtk_mdp_core.h"
  23 #include "mtk_mdp_m2m.h"
  24 #include "mtk_vpu.h"
  25
  26 /* MDP debug log level (0-3). 3 shows all the logs. */
  27 int mtk_mdp_dbg_level;
  28 EXPORT_SYMBOL(mtk_mdp_dbg_level);
  29
  30 module_param(mtk_mdp_dbg_level, int, 0644);
  31
  32 static const struct of_device_id mtk_mdp_comp_dt_ids[] = {
  33         {
  34                 .compatible = "mediatek,mt8173-mdp-rdma",
  35                 .data = (void *)MTK_MDP_RDMA
  36         }, {
  37                 .compatible = "mediatek,mt8173-mdp-rsz",
  38                 .data = (void *)MTK_MDP_RSZ
  39         }, {
  40                 .compatible = "mediatek,mt8173-mdp-wdma",
  41                 .data = (void *)MTK_MDP_WDMA
  42         }, {
  43                 .compatible = "mediatek,mt8173-mdp-wrot",
  44                 .data = (void *)MTK_MDP_WROT
  45         },
  46         { },
  47 };
  48
  49 static const struct of_device_id mtk_mdp_of_ids[] = {
  50         { .compatible = "mediatek,mt8173-mdp", },
  51         { },
  52 };
  53 MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);
  54
  55 static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
  56 {
  57         struct device *dev = &mdp->pdev->dev;
  58         int i;
  59
  60         for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
  61                 mtk_mdp_comp_clock_on(dev, mdp->comp[i]);
  62 }
  63
  64 static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
  65 {
  66         struct device *dev = &mdp->pdev->dev;
  67         int i;
  68
  69         for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
  70                 mtk_mdp_comp_clock_off(dev, mdp->comp[i]);
  71 }
  72
  73 static void mtk_mdp_wdt_worker(struct work_struct *work)
  74 {
  75         struct mtk_mdp_dev *mdp =
  76                         container_of(work, struct mtk_mdp_dev, wdt_work);
  77         struct mtk_mdp_ctx *ctx;
  78
  79         mtk_mdp_err("Watchdog timeout");
  80
  81         list_for_each_entry(ctx, &mdp->ctx_list, list) {
  82                 mtk_mdp_dbg(0, "[%d] Change as state error", ctx->id);
  83                 mtk_mdp_ctx_state_lock_set(ctx, MTK_MDP_CTX_ERROR);
  84         }
  85 }
  86
  87 static void mtk_mdp_reset_handler(void *priv)
  88 {
  89         struct mtk_mdp_dev *mdp = priv;
  90
  91         queue_work(mdp->wdt_wq, &mdp->wdt_work);
  92 }
  93
  94 static int mtk_mdp_probe(struct platform_device *pdev)
  95 {
  96         struct mtk_mdp_dev *mdp;
  97         struct device *dev = &pdev->dev;
  98         struct device_node *node, *parent;
  99         int i, ret = 0;
 100
 101         mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
 102         if (!mdp)
 103                 return -ENOMEM;
 104
 105         mdp->id = pdev->id;
 106         mdp->pdev = pdev;
 107         INIT_LIST_HEAD(&mdp->ctx_list);
 108
 109         mutex_init(&mdp->lock);
 110         mutex_init(&mdp->vpulock);
 111
 112         /* Old dts had the components as child nodes */
 113         if (of_get_next_child(dev->of_node, NULL)) {
 114                 parent = dev->of_node;
 115                 dev_warn(dev, "device tree is out of date\n");
 116         } else {
 117                 parent = dev->of_node->parent;
 118         }
 119
 120         /* Iterate over sibling MDP function blocks */
 121         for_each_child_of_node(parent, node) {
 122                 const struct of_device_id *of_id;
 123                 enum mtk_mdp_comp_type comp_type;
 124                 int comp_id;
 125                 struct mtk_mdp_comp *comp;
 126
 127                 of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
 128                 if (!of_id)
 129                         continue;
 130
 131                 if (!of_device_is_available(node)) {
 132                         dev_err(dev, "Skipping disabled component %pOF\n",
 133                                 node);
 134                         continue;
 135                 }
 136
 137                 comp_type = (enum mtk_mdp_comp_type)of_id->data;
 138                 comp_id = mtk_mdp_comp_get_id(dev, node, comp_type);
 139                 if (comp_id < 0) {
 140                         dev_warn(dev, "Skipping unknown component %pOF\n",
 141                                  node);
 142                         continue;
 143                 }
 144
 145                 comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
 146                 if (!comp) {
 147                         ret = -ENOMEM;
 148                         goto err_comp;
 149                 }
 150                 mdp->comp[comp_id] = comp;
 151
 152                 ret = mtk_mdp_comp_init(dev, node, comp, comp_id);
 153                 if (ret)
 154                         goto err_comp;
 155         }
 156
 157         mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
 158         if (!mdp->job_wq) {
 159                 dev_err(&pdev->dev, "unable to alloc job workqueue\n");
 160                 ret = -ENOMEM;
 161                 goto err_alloc_job_wq;
 162         }
 163
 164         mdp->wdt_wq = create_singlethread_workqueue("mdp_wdt_wq");
 165         if (!mdp->wdt_wq) {
 166                 dev_err(&pdev->dev, "unable to alloc wdt workqueue\n");
 167                 ret = -ENOMEM;
 168                 goto err_alloc_wdt_wq;
 169         }
 170         INIT_WORK(&mdp->wdt_work, mtk_mdp_wdt_worker);
 171
 172         ret = v4l2_device_register(dev, &mdp->v4l2_dev);
 173         if (ret) {
 174                 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
 175                 ret = -EINVAL;
 176                 goto err_dev_register;
 177         }
 178
 179         ret = mtk_mdp_register_m2m_device(mdp);
 180         if (ret) {
 181                 v4l2_err(&mdp->v4l2_dev, "Failed to init mem2mem device\n");
 182                 goto err_m2m_register;
 183         }
 184
 185         mdp->vpu_dev = vpu_get_plat_device(pdev);
 186         vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
 187                             VPU_RST_MDP);
 188
 189         platform_set_drvdata(pdev, mdp);
 190
 191         vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
 192
 193         pm_runtime_enable(dev);
 194         dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);
 195
 196         return 0;
 197
 198 err_m2m_register:
 199         v4l2_device_unregister(&mdp->v4l2_dev);
 200
 201 err_dev_register:
 202         destroy_workqueue(mdp->wdt_wq);
 203
 204 err_alloc_wdt_wq:
 205         destroy_workqueue(mdp->job_wq);
 206
 207 err_alloc_job_wq:
 208
 209 err_comp:
 210         for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
 211                 mtk_mdp_comp_deinit(dev, mdp->comp[i]);
 212
 213         dev_dbg(dev, "err %d\n", ret);
 214         return ret;
 215 }
 216
 217 static int mtk_mdp_remove(struct platform_device *pdev)
 218 {
 219         struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
 220         int i;
 221
 222         pm_runtime_disable(&pdev->dev);
 223         vb2_dma_contig_clear_max_seg_size(&pdev->dev);
 224         mtk_mdp_unregister_m2m_device(mdp);
 225         v4l2_device_unregister(&mdp->v4l2_dev);
 226
 227         flush_workqueue(mdp->job_wq);
 228         destroy_workqueue(mdp->job_wq);
 229
 230         for (i = 0; i < ARRAY_SIZE(mdp->comp); i++)
 231                 mtk_mdp_comp_deinit(&pdev->dev, mdp->comp[i]);
 232
 233         dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
 234         return 0;
 235 }
 236
 237 static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev)
 238 {
 239         struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
 240
 241         mtk_mdp_clock_off(mdp);
 242
 243         return 0;
 244 }
 245
 246 static int __maybe_unused mtk_mdp_pm_resume(struct device *dev)
 247 {
 248         struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
 249
 250         mtk_mdp_clock_on(mdp);
 251
 252         return 0;
 253 }
 254
 255 static int __maybe_unused mtk_mdp_suspend(struct device *dev)
 256 {
 257         if (pm_runtime_suspended(dev))
 258                 return 0;
 259
 260         return mtk_mdp_pm_suspend(dev);
 261 }
 262
 263 static int __maybe_unused mtk_mdp_resume(struct device *dev)
 264 {
 265         if (pm_runtime_suspended(dev))
 266                 return 0;
 267
 268         return mtk_mdp_pm_resume(dev);
 269 }
 270
 271 static const struct dev_pm_ops mtk_mdp_pm_ops = {
 272         SET_SYSTEM_SLEEP_PM_OPS(mtk_mdp_suspend, mtk_mdp_resume)
 273         SET_RUNTIME_PM_OPS(mtk_mdp_pm_suspend, mtk_mdp_pm_resume, NULL)
 274 };
 275
 276 static struct platform_driver mtk_mdp_driver = {
 277         .probe          = mtk_mdp_probe,
 278         .remove         = mtk_mdp_remove,
 279         .driver = {
 280                 .name   = MTK_MDP_MODULE_NAME,
 281                 .pm     = &mtk_mdp_pm_ops,
 282                 .of_match_table = mtk_mdp_of_ids,
 283         }
 284 };
 285
 286 module_platform_driver(mtk_mdp_driver);
 287
 288 MODULE_AUTHOR("Houlong Wei <houlong.wei@mediatek.com>");
 289 MODULE_DESCRIPTION("Mediatek image processor driver");
 290 MODULE_LICENSE("GPL v2");