drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c

   1 /*
   2  * Copyright (c) 2016 MediaTek Inc.
   3  * Author: PC Chen <pc.chen@mediatek.com>
   4  *         Tiffany Lin <tiffany.lin@mediatek.com>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  */
  15
  16 #include <linux/slab.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/irq.h>
  19 #include <linux/module.h>
  20 #include <linux/of_device.h>
  21 #include <linux/of.h>
  22 #include <media/v4l2-event.h>
  23 #include <media/v4l2-mem2mem.h>
  24 #include <media/videobuf2-dma-contig.h>
  25
  26 #include "mtk_vcodec_drv.h"
  27 #include "mtk_vcodec_dec.h"
  28 #include "mtk_vcodec_dec_pm.h"
  29 #include "mtk_vcodec_intr.h"
  30 #include "mtk_vcodec_util.h"
  31 #include "mtk_vpu.h"
  32
  33 #define VDEC_HW_ACTIVE  0x10
  34 #define VDEC_IRQ_CFG    0x11
  35 #define VDEC_IRQ_CLR    0x10
  36 #define VDEC_IRQ_CFG_REG        0xa4
  37
  38 module_param(mtk_v4l2_dbg_level, int, 0644);
  39 module_param(mtk_vcodec_dbg, bool, 0644);
  40
  41 /* Wake up context wait_queue */
  42 static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
  43 {
  44         ctx->int_cond = 1;
  45         wake_up_interruptible(&ctx->queue);
  46 }
  47
  48 static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
  49 {
  50         struct mtk_vcodec_dev *dev = priv;
  51         struct mtk_vcodec_ctx *ctx;
  52         u32 cg_status = 0;
  53         unsigned int dec_done_status = 0;
  54         void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
  55                                         VDEC_IRQ_CFG_REG;
  56
  57         ctx = mtk_vcodec_get_curr_ctx(dev);
  58
  59         /* check if HW active or not */
  60         cg_status = readl(dev->reg_base[0]);
  61         if ((cg_status & VDEC_HW_ACTIVE) != 0) {
  62                 mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
  63                              cg_status);
  64                 return IRQ_HANDLED;
  65         }
  66
  67         dec_done_status = readl(vdec_misc_addr);
  68         ctx->irq_status = dec_done_status;
  69         if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
  70                 MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
  71                 return IRQ_HANDLED;
  72
  73         /* clear interrupt */
  74         writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
  75                 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
  76         writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
  77                 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
  78
  79         wake_up_ctx(ctx);
  80
  81         mtk_v4l2_debug(3,
  82                         "mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
  83                         ctx->id, dec_done_status);
  84
  85         return IRQ_HANDLED;
  86 }
  87
  88 static void mtk_vcodec_dec_reset_handler(void *priv)
  89 {
  90         struct mtk_vcodec_dev *dev = priv;
  91         struct mtk_vcodec_ctx *ctx;
  92
  93         mtk_v4l2_err("Watchdog timeout!!");
  94
  95         mutex_lock(&dev->dev_mutex);
  96         list_for_each_entry(ctx, &dev->ctx_list, list) {
  97                 ctx->state = MTK_STATE_ABORT;
  98                 mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ERROR",
  99                                 ctx->id);
 100         }
 101         mutex_unlock(&dev->dev_mutex);
 102 }
 103
 104 static int fops_vcodec_open(struct file *file)
 105 {
 106         struct mtk_vcodec_dev *dev = video_drvdata(file);
 107         struct mtk_vcodec_ctx *ctx = NULL;
 108         int ret = 0;
 109
 110         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 111         if (!ctx)
 112                 return -ENOMEM;
 113
 114         mutex_lock(&dev->dev_mutex);
 115         ctx->id = dev->id_counter++;
 116         v4l2_fh_init(&ctx->fh, video_devdata(file));
 117         file->private_data = &ctx->fh;
 118         v4l2_fh_add(&ctx->fh);
 119         INIT_LIST_HEAD(&ctx->list);
 120         ctx->dev = dev;
 121         init_waitqueue_head(&ctx->queue);
 122         mutex_init(&ctx->lock);
 123
 124         ctx->type = MTK_INST_DECODER;
 125         ret = mtk_vcodec_dec_ctrls_setup(ctx);
 126         if (ret) {
 127                 mtk_v4l2_err("Failed to setup mt vcodec controls");
 128                 goto err_ctrls_setup;
 129         }
 130         ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
 131                 &mtk_vcodec_dec_queue_init);
 132         if (IS_ERR((__force void *)ctx->m2m_ctx)) {
 133                 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
 134                 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
 135                         ret);
 136                 goto err_m2m_ctx_init;
 137         }
 138         mtk_vcodec_dec_set_default_params(ctx);
 139
 140         if (v4l2_fh_is_singular(&ctx->fh)) {
 141                 mtk_vcodec_dec_pw_on(&dev->pm);
 142                 /*
 143                  * vpu_load_firmware checks if it was loaded already and
 144                  * does nothing in that case
 145                  */
 146                 ret = vpu_load_firmware(dev->vpu_plat_dev);
 147                 if (ret < 0) {
 148                         /*
 149                          * Return 0 if downloading firmware successfully,
 150                          * otherwise it is failed
 151                          */
 152                         mtk_v4l2_err("vpu_load_firmware failed!");
 153                         goto err_load_fw;
 154                 }
 155
 156                 dev->dec_capability =
 157                         vpu_get_vdec_hw_capa(dev->vpu_plat_dev);
 158                 mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
 159         }
 160
 161         list_add(&ctx->list, &dev->ctx_list);
 162
 163         mutex_unlock(&dev->dev_mutex);
 164         mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
 165                         ctx->id);
 166         return ret;
 167
 168         /* Deinit when failure occurred */
 169 err_load_fw:
 170         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 171 err_m2m_ctx_init:
 172         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 173 err_ctrls_setup:
 174         v4l2_fh_del(&ctx->fh);
 175         v4l2_fh_exit(&ctx->fh);
 176         kfree(ctx);
 177         mutex_unlock(&dev->dev_mutex);
 178
 179         return ret;
 180 }
 181
 182 static int fops_vcodec_release(struct file *file)
 183 {
 184         struct mtk_vcodec_dev *dev = video_drvdata(file);
 185         struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
 186
 187         mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
 188         mutex_lock(&dev->dev_mutex);
 189
 190         /*
 191          * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
 192          * makes sure the worker thread is not running after vdec_if_deinit.
 193          * Second, the decoder will be flushed and all the buffers will be
 194          * returned in stop_streaming.
 195          */
 196         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 197         mtk_vcodec_dec_release(ctx);
 198
 199         if (v4l2_fh_is_singular(&ctx->fh))
 200                 mtk_vcodec_dec_pw_off(&dev->pm);
 201         v4l2_fh_del(&ctx->fh);
 202         v4l2_fh_exit(&ctx->fh);
 203         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 204
 205         list_del_init(&ctx->list);
 206         kfree(ctx);
 207         mutex_unlock(&dev->dev_mutex);
 208         return 0;
 209 }
 210
 211 static const struct v4l2_file_operations mtk_vcodec_fops = {
 212         .owner          = THIS_MODULE,
 213         .open           = fops_vcodec_open,
 214         .release        = fops_vcodec_release,
 215         .poll           = v4l2_m2m_fop_poll,
 216         .unlocked_ioctl = video_ioctl2,
 217         .mmap           = v4l2_m2m_fop_mmap,
 218 };
 219
 220 static int mtk_vcodec_probe(struct platform_device *pdev)
 221 {
 222         struct mtk_vcodec_dev *dev;
 223         struct video_device *vfd_dec;
 224         struct resource *res;
 225         int i, ret;
 226
 227         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 228         if (!dev)
 229                 return -ENOMEM;
 230
 231         INIT_LIST_HEAD(&dev->ctx_list);
 232         dev->plat_dev = pdev;
 233
 234         dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
 235         if (dev->vpu_plat_dev == NULL) {
 236                 mtk_v4l2_err("[VPU] vpu device in not ready");
 237                 return -EPROBE_DEFER;
 238         }
 239
 240         vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_dec_reset_handler,
 241                         dev, VPU_RST_DEC);
 242
 243         ret = mtk_vcodec_init_dec_pm(dev);
 244         if (ret < 0) {
 245                 dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
 246                 return ret;
 247         }
 248
 249         for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
 250                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 251                 if (res == NULL) {
 252                         dev_err(&pdev->dev, "get memory resource failed.");
 253                         ret = -ENXIO;
 254                         goto err_res;
 255                 }
 256                 dev->reg_base[i] = devm_ioremap_resource(&pdev->dev, res);
 257                 if (IS_ERR((__force void *)dev->reg_base[i])) {
 258                         ret = PTR_ERR((__force void *)dev->reg_base[i]);
 259                         goto err_res;
 260                 }
 261                 mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
 262         }
 263
 264         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 265         if (res == NULL) {
 266                 dev_err(&pdev->dev, "failed to get irq resource");
 267                 ret = -ENOENT;
 268                 goto err_res;
 269         }
 270
 271         dev->dec_irq = platform_get_irq(pdev, 0);
 272         ret = devm_request_irq(&pdev->dev, dev->dec_irq,
 273                         mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
 274         if (ret) {
 275                 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
 276                         dev->dec_irq,
 277                         ret);
 278                 goto err_res;
 279         }
 280
 281         disable_irq(dev->dec_irq);
 282         mutex_init(&dev->dec_mutex);
 283         mutex_init(&dev->dev_mutex);
 284         spin_lock_init(&dev->irqlock);
 285
 286         snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
 287                 "[/MTK_V4L2_VDEC]");
 288
 289         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 290         if (ret) {
 291                 mtk_v4l2_err("v4l2_device_register err=%d", ret);
 292                 goto err_res;
 293         }
 294
 295         init_waitqueue_head(&dev->queue);
 296
 297         vfd_dec = video_device_alloc();
 298         if (!vfd_dec) {
 299                 mtk_v4l2_err("Failed to allocate video device");
 300                 ret = -ENOMEM;
 301                 goto err_dec_alloc;
 302         }
 303         vfd_dec->fops           = &mtk_vcodec_fops;
 304         vfd_dec->ioctl_ops      = &mtk_vdec_ioctl_ops;
 305         vfd_dec->release        = video_device_release;
 306         vfd_dec->lock           = &dev->dev_mutex;
 307         vfd_dec->v4l2_dev       = &dev->v4l2_dev;
 308         vfd_dec->vfl_dir        = VFL_DIR_M2M;
 309         vfd_dec->device_caps    = V4L2_CAP_VIDEO_M2M_MPLANE |
 310                         V4L2_CAP_STREAMING;
 311
 312         snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
 313                 MTK_VCODEC_DEC_NAME);
 314         video_set_drvdata(vfd_dec, dev);
 315         dev->vfd_dec = vfd_dec;
 316         platform_set_drvdata(pdev, dev);
 317
 318         dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
 319         if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
 320                 mtk_v4l2_err("Failed to init mem2mem dec device");
 321                 ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
 322                 goto err_dec_mem_init;
 323         }
 324
 325         dev->decode_workqueue =
 326                 alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
 327                         WQ_MEM_RECLAIM | WQ_FREEZABLE);
 328         if (!dev->decode_workqueue) {
 329                 mtk_v4l2_err("Failed to create decode workqueue");
 330                 ret = -EINVAL;
 331                 goto err_event_workq;
 332         }
 333
 334         ret = video_register_device(vfd_dec, VFL_TYPE_GRABBER, 0);
 335         if (ret) {
 336                 mtk_v4l2_err("Failed to register video device");
 337                 goto err_dec_reg;
 338         }
 339
 340         mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
 341                 vfd_dec->num);
 342
 343         return 0;
 344
 345 err_dec_reg:
 346         destroy_workqueue(dev->decode_workqueue);
 347 err_event_workq:
 348         v4l2_m2m_release(dev->m2m_dev_dec);
 349 err_dec_mem_init:
 350         video_unregister_device(vfd_dec);
 351 err_dec_alloc:
 352         v4l2_device_unregister(&dev->v4l2_dev);
 353 err_res:
 354         mtk_vcodec_release_dec_pm(dev);
 355         return ret;
 356 }
 357
 358 static const struct of_device_id mtk_vcodec_match[] = {
 359         {.compatible = "mediatek,mt8173-vcodec-dec",},
 360         {},
 361 };
 362
 363 MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
 364
 365 static int mtk_vcodec_dec_remove(struct platform_device *pdev)
 366 {
 367         struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
 368
 369         flush_workqueue(dev->decode_workqueue);
 370         destroy_workqueue(dev->decode_workqueue);
 371         if (dev->m2m_dev_dec)
 372                 v4l2_m2m_release(dev->m2m_dev_dec);
 373
 374         if (dev->vfd_dec)
 375                 video_unregister_device(dev->vfd_dec);
 376
 377         v4l2_device_unregister(&dev->v4l2_dev);
 378         mtk_vcodec_release_dec_pm(dev);
 379         return 0;
 380 }
 381
 382 static struct platform_driver mtk_vcodec_dec_driver = {
 383         .probe  = mtk_vcodec_probe,
 384         .remove = mtk_vcodec_dec_remove,
 385         .driver = {
 386                 .name   = MTK_VCODEC_DEC_NAME,
 387                 .of_match_table = mtk_vcodec_match,
 388         },
 389 };
 390
 391 module_platform_driver(mtk_vcodec_dec_driver);
 392
 393 MODULE_LICENSE("GPL v2");
 394 MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");