drivers/media/platform/mediatek/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
  21 #include "mtk_mdp_core.h"
  22 #include "mtk_mdp_m2m.h"
  23 #include "mtk_vpu.h"
  24
  25 /* MDP debug log level (0-3). 3 shows all the logs. */
  26 int mtk_mdp_dbg_level;
  27 EXPORT_SYMBOL(mtk_mdp_dbg_level);
  28
  29 module_param(mtk_mdp_dbg_level, int, 0644);
  30
  31 static const struct of_device_id mtk_mdp_comp_dt_ids[] __maybe_unused = {
  32         {
  33                 .compatible = "mediatek,mt8173-mdp-rdma",
  34                 .data = (void *)MTK_MDP_RDMA
  35         }, {
  36                 .compatible = "mediatek,mt8173-mdp-rsz",
  37                 .data = (void *)MTK_MDP_RSZ
  38         }, {
  39                 .compatible = "mediatek,mt8173-mdp-wdma",
  40                 .data = (void *)MTK_MDP_WDMA
  41         }, {
  42                 .compatible = "mediatek,mt8173-mdp-wrot",
  43                 .data = (void *)MTK_MDP_WROT
  44         },
  45         { },
  46 };
  47
  48 static const struct of_device_id mtk_mdp_of_ids[] = {
  49         { .compatible = "mediatek,mt8173-mdp", },
  50         { },
  51 };
  52 MODULE_DEVICE_TABLE(of, mtk_mdp_of_ids);
  53
  54 static void mtk_mdp_clock_on(struct mtk_mdp_dev *mdp)
  55 {
  56         struct device *dev = &mdp->pdev->dev;
  57         struct mtk_mdp_comp *comp_node;
  58
  59         list_for_each_entry(comp_node, &mdp->comp_list, node)
  60                 mtk_mdp_comp_clock_on(dev, comp_node);
  61 }
  62
  63 static void mtk_mdp_clock_off(struct mtk_mdp_dev *mdp)
  64 {
  65         struct device *dev = &mdp->pdev->dev;
  66         struct mtk_mdp_comp *comp_node;
  67
  68         list_for_each_entry(comp_node, &mdp->comp_list, node)
  69                 mtk_mdp_comp_clock_off(dev, comp_node);
  70 }
  71
  72 static void mtk_mdp_wdt_worker(struct work_struct *work)
  73 {
  74         struct mtk_mdp_dev *mdp =
  75                         container_of(work, struct mtk_mdp_dev, wdt_work);
  76         struct mtk_mdp_ctx *ctx;
  77
  78         mtk_mdp_err("Watchdog timeout");
  79
  80         list_for_each_entry(ctx, &mdp->ctx_list, list) {
  81                 mtk_mdp_dbg(0, "[%d] Change as state error", ctx->id);
  82                 mtk_mdp_ctx_state_lock_set(ctx, MTK_MDP_CTX_ERROR);
  83         }
  84 }
  85
  86 static void mtk_mdp_reset_handler(void *priv)
  87 {
  88         struct mtk_mdp_dev *mdp = priv;
  89
  90         queue_work(mdp->wdt_wq, &mdp->wdt_work);
  91 }
  92
  93 void mtk_mdp_register_component(struct mtk_mdp_dev *mdp,
  94                                 struct mtk_mdp_comp *comp)
  95 {
  96         list_add(&comp->node, &mdp->comp_list);
  97 }
  98
  99 void mtk_mdp_unregister_component(struct mtk_mdp_dev *mdp,
 100                                   struct mtk_mdp_comp *comp)
 101 {
 102         list_del(&comp->node);
 103 }
 104
 105 static int mtk_mdp_probe(struct platform_device *pdev)
 106 {
 107         struct mtk_mdp_dev *mdp;
 108         struct device *dev = &pdev->dev;
 109         struct device_node *node, *parent;
 110         struct mtk_mdp_comp *comp, *comp_temp;
 111         int ret = 0;
 112
 113         mdp = devm_kzalloc(dev, sizeof(*mdp), GFP_KERNEL);
 114         if (!mdp)
 115                 return -ENOMEM;
 116
 117         mdp->id = pdev->id;
 118         mdp->pdev = pdev;
 119         INIT_LIST_HEAD(&mdp->comp_list);
 120         INIT_LIST_HEAD(&mdp->ctx_list);
 121
 122         mutex_init(&mdp->lock);
 123         mutex_init(&mdp->vpulock);
 124
 125         /* Old dts had the components as child nodes */
 126         node = of_get_next_child(dev->of_node, NULL);
 127         if (node) {
 128                 of_node_put(node);
 129                 parent = dev->of_node;
 130                 dev_warn(dev, "device tree is out of date\n");
 131         } else {
 132                 parent = dev->of_node->parent;
 133         }
 134
 135         /* Iterate over sibling MDP function blocks */
 136         for_each_child_of_node(parent, node) {
 137                 const struct of_device_id *of_id;
 138                 enum mtk_mdp_comp_type comp_type;
 139
 140                 of_id = of_match_node(mtk_mdp_comp_dt_ids, node);
 141                 if (!of_id)
 142                         continue;
 143
 144                 if (!of_device_is_available(node)) {
 145                         dev_err(dev, "Skipping disabled component %pOF\n",
 146                                 node);
 147                         continue;
 148                 }
 149
 150                 comp_type = (uintptr_t)of_id->data;
 151
 152                 comp = devm_kzalloc(dev, sizeof(*comp), GFP_KERNEL);
 153                 if (!comp) {
 154                         ret = -ENOMEM;
 155                         of_node_put(node);
 156                         goto err_comp;
 157                 }
 158
 159                 ret = mtk_mdp_comp_init(dev, node, comp, comp_type);
 160                 if (ret) {
 161                         of_node_put(node);
 162                         goto err_comp;
 163                 }
 164
 165                 mtk_mdp_register_component(mdp, comp);
 166         }
 167
 168         mdp->job_wq = create_singlethread_workqueue(MTK_MDP_MODULE_NAME);
 169         if (!mdp->job_wq) {
 170                 dev_err(&pdev->dev, "unable to alloc job workqueue\n");
 171                 ret = -ENOMEM;
 172                 goto err_alloc_job_wq;
 173         }
 174
 175         mdp->wdt_wq = create_singlethread_workqueue("mdp_wdt_wq");
 176         if (!mdp->wdt_wq) {
 177                 dev_err(&pdev->dev, "unable to alloc wdt workqueue\n");
 178                 ret = -ENOMEM;
 179                 goto err_alloc_wdt_wq;
 180         }
 181         INIT_WORK(&mdp->wdt_work, mtk_mdp_wdt_worker);
 182
 183         ret = v4l2_device_register(dev, &mdp->v4l2_dev);
 184         if (ret) {
 185                 dev_err(&pdev->dev, "Failed to register v4l2 device\n");
 186                 ret = -EINVAL;
 187                 goto err_dev_register;
 188         }
 189
 190         ret = mtk_mdp_register_m2m_device(mdp);
 191         if (ret) {
 192                 v4l2_err(&mdp->v4l2_dev, "Failed to init mem2mem device\n");
 193                 goto err_m2m_register;
 194         }
 195
 196         mdp->vpu_dev = vpu_get_plat_device(pdev);
 197         ret = vpu_wdt_reg_handler(mdp->vpu_dev, mtk_mdp_reset_handler, mdp,
 198                                   VPU_RST_MDP);
 199         if (ret) {
 200                 dev_err(&pdev->dev, "Failed to register reset handler\n");
 201                 goto err_m2m_register;
 202         }
 203
 204         platform_set_drvdata(pdev, mdp);
 205
 206         ret = vb2_dma_contig_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
 207         if (ret) {
 208                 dev_err(&pdev->dev, "Failed to set vb2 dma mag seg size\n");
 209                 goto err_m2m_register;
 210         }
 211
 212         pm_runtime_enable(dev);
 213         dev_dbg(dev, "mdp-%d registered successfully\n", mdp->id);
 214
 215         return 0;
 216
 217 err_m2m_register:
 218         v4l2_device_unregister(&mdp->v4l2_dev);
 219
 220 err_dev_register:
 221         destroy_workqueue(mdp->wdt_wq);
 222
 223 err_alloc_wdt_wq:
 224         destroy_workqueue(mdp->job_wq);
 225
 226 err_alloc_job_wq:
 227
 228 err_comp:
 229         list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
 230                 mtk_mdp_unregister_component(mdp, comp);
 231                 mtk_mdp_comp_deinit(dev, comp);
 232         }
 233
 234         dev_dbg(dev, "err %d\n", ret);
 235         return ret;
 236 }
 237
 238 static void mtk_mdp_remove(struct platform_device *pdev)
 239 {
 240         struct mtk_mdp_dev *mdp = platform_get_drvdata(pdev);
 241         struct mtk_mdp_comp *comp, *comp_temp;
 242
 243         pm_runtime_disable(&pdev->dev);
 244         vb2_dma_contig_clear_max_seg_size(&pdev->dev);
 245         mtk_mdp_unregister_m2m_device(mdp);
 246         v4l2_device_unregister(&mdp->v4l2_dev);
 247
 248         destroy_workqueue(mdp->wdt_wq);
 249
 250         destroy_workqueue(mdp->job_wq);
 251
 252         list_for_each_entry_safe(comp, comp_temp, &mdp->comp_list, node) {
 253                 mtk_mdp_unregister_component(mdp, comp);
 254                 mtk_mdp_comp_deinit(&pdev->dev, comp);
 255         }
 256
 257         dev_dbg(&pdev->dev, "%s driver unloaded\n", pdev->name);
 258 }
 259
 260 static int __maybe_unused mtk_mdp_pm_suspend(struct device *dev)
 261 {
 262         struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
 263
 264         mtk_mdp_clock_off(mdp);
 265
 266         return 0;
 267 }
 268
 269 static int __maybe_unused mtk_mdp_pm_resume(struct device *dev)
 270 {
 271         struct mtk_mdp_dev *mdp = dev_get_drvdata(dev);
 272
 273         mtk_mdp_clock_on(mdp);
 274
 275         return 0;
 276 }
 277
 278 static int __maybe_unused mtk_mdp_suspend(struct device *dev)
 279 {
 280         if (pm_runtime_suspended(dev))
 281                 return 0;
 282
 283         return mtk_mdp_pm_suspend(dev);
 284 }
 285
 286 static int __maybe_unused mtk_mdp_resume(struct device *dev)
 287 {
 288         if (pm_runtime_suspended(dev))
 289                 return 0;
 290
 291         return mtk_mdp_pm_resume(dev);
 292 }
 293
 294 static const struct dev_pm_ops mtk_mdp_pm_ops = {
 295         SET_SYSTEM_SLEEP_PM_OPS(mtk_mdp_suspend, mtk_mdp_resume)
 296         SET_RUNTIME_PM_OPS(mtk_mdp_pm_suspend, mtk_mdp_pm_resume, NULL)
 297 };
 298
 299 static struct platform_driver mtk_mdp_driver = {
 300         .probe          = mtk_mdp_probe,
 301         .remove_new     = mtk_mdp_remove,
 302         .driver = {
 303                 .name   = MTK_MDP_MODULE_NAME,
 304                 .pm     = &mtk_mdp_pm_ops,
 305                 .of_match_table = mtk_mdp_of_ids,
 306         }
 307 };
 308
 309 module_platform_driver(mtk_mdp_driver);
 310
 311 MODULE_AUTHOR("Houlong Wei <houlong.wei@mediatek.com>");
 312 MODULE_DESCRIPTION("Mediatek image processor driver");
 313 MODULE_LICENSE("GPL v2");