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         struct mtk_video_dec_buf *mtk_buf = NULL;
 109         int ret = 0;
 110         struct vb2_queue *src_vq;
 111
 112         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 113         if (!ctx)
 114                 return -ENOMEM;
 115         mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
 116         if (!mtk_buf) {
 117                 kfree(ctx);
 118                 return -ENOMEM;
 119         }
 120
 121         mutex_lock(&dev->dev_mutex);
 122         ctx->empty_flush_buf = mtk_buf;
 123         ctx->id = dev->id_counter++;
 124         v4l2_fh_init(&ctx->fh, video_devdata(file));
 125         file->private_data = &ctx->fh;
 126         v4l2_fh_add(&ctx->fh);
 127         INIT_LIST_HEAD(&ctx->list);
 128         ctx->dev = dev;
 129         init_waitqueue_head(&ctx->queue);
 130         mutex_init(&ctx->lock);
 131
 132         ctx->type = MTK_INST_DECODER;
 133         ret = mtk_vcodec_dec_ctrls_setup(ctx);
 134         if (ret) {
 135                 mtk_v4l2_err("Failed to setup mt vcodec controls");
 136                 goto err_ctrls_setup;
 137         }
 138         ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
 139                 &mtk_vcodec_dec_queue_init);
 140         if (IS_ERR((__force void *)ctx->m2m_ctx)) {
 141                 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
 142                 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
 143                         ret);
 144                 goto err_m2m_ctx_init;
 145         }
 146         src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
 147                                 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
 148         ctx->empty_flush_buf->vb.vb2_buf.vb2_queue = src_vq;
 149         ctx->empty_flush_buf->lastframe = true;
 150         mtk_vcodec_dec_set_default_params(ctx);
 151
 152         if (v4l2_fh_is_singular(&ctx->fh)) {
 153                 mtk_vcodec_dec_pw_on(&dev->pm);
 154                 /*
 155                  * vpu_load_firmware checks if it was loaded already and
 156                  * does nothing in that case
 157                  */
 158                 ret = vpu_load_firmware(dev->vpu_plat_dev);
 159                 if (ret < 0) {
 160                         /*
 161                          * Return 0 if downloading firmware successfully,
 162                          * otherwise it is failed
 163                          */
 164                         mtk_v4l2_err("vpu_load_firmware failed!");
 165                         goto err_load_fw;
 166                 }
 167
 168                 dev->dec_capability =
 169                         vpu_get_vdec_hw_capa(dev->vpu_plat_dev);
 170                 mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
 171         }
 172
 173         list_add(&ctx->list, &dev->ctx_list);
 174
 175         mutex_unlock(&dev->dev_mutex);
 176         mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
 177                         ctx->id);
 178         return ret;
 179
 180         /* Deinit when failure occurred */
 181 err_load_fw:
 182         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 183 err_m2m_ctx_init:
 184         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 185 err_ctrls_setup:
 186         v4l2_fh_del(&ctx->fh);
 187         v4l2_fh_exit(&ctx->fh);
 188         kfree(ctx->empty_flush_buf);
 189         kfree(ctx);
 190         mutex_unlock(&dev->dev_mutex);
 191
 192         return ret;
 193 }
 194
 195 static int fops_vcodec_release(struct file *file)
 196 {
 197         struct mtk_vcodec_dev *dev = video_drvdata(file);
 198         struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
 199
 200         mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
 201         mutex_lock(&dev->dev_mutex);
 202
 203         /*
 204          * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
 205          * makes sure the worker thread is not running after vdec_if_deinit.
 206          * Second, the decoder will be flushed and all the buffers will be
 207          * returned in stop_streaming.
 208          */
 209         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 210         mtk_vcodec_dec_release(ctx);
 211
 212         if (v4l2_fh_is_singular(&ctx->fh))
 213                 mtk_vcodec_dec_pw_off(&dev->pm);
 214         v4l2_fh_del(&ctx->fh);
 215         v4l2_fh_exit(&ctx->fh);
 216         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 217
 218         list_del_init(&ctx->list);
 219         kfree(ctx->empty_flush_buf);
 220         kfree(ctx);
 221         mutex_unlock(&dev->dev_mutex);
 222         return 0;
 223 }
 224
 225 static const struct v4l2_file_operations mtk_vcodec_fops = {
 226         .owner          = THIS_MODULE,
 227         .open           = fops_vcodec_open,
 228         .release        = fops_vcodec_release,
 229         .poll           = v4l2_m2m_fop_poll,
 230         .unlocked_ioctl = video_ioctl2,
 231         .mmap           = v4l2_m2m_fop_mmap,
 232 };
 233
 234 static int mtk_vcodec_probe(struct platform_device *pdev)
 235 {
 236         struct mtk_vcodec_dev *dev;
 237         struct video_device *vfd_dec;
 238         struct resource *res;
 239         int i, ret;
 240
 241         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 242         if (!dev)
 243                 return -ENOMEM;
 244
 245         INIT_LIST_HEAD(&dev->ctx_list);
 246         dev->plat_dev = pdev;
 247
 248         dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
 249         if (dev->vpu_plat_dev == NULL) {
 250                 mtk_v4l2_err("[VPU] vpu device in not ready");
 251                 return -EPROBE_DEFER;
 252         }
 253
 254         vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_dec_reset_handler,
 255                         dev, VPU_RST_DEC);
 256
 257         ret = mtk_vcodec_init_dec_pm(dev);
 258         if (ret < 0) {
 259                 dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
 260                 return ret;
 261         }
 262
 263         for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
 264                 res = platform_get_resource(pdev, IORESOURCE_MEM, i);
 265                 if (res == NULL) {
 266                         dev_err(&pdev->dev, "get memory resource failed.");
 267                         ret = -ENXIO;
 268                         goto err_res;
 269                 }
 270                 dev->reg_base[i] = devm_ioremap_resource(&pdev->dev, res);
 271                 if (IS_ERR((__force void *)dev->reg_base[i])) {
 272                         ret = PTR_ERR((__force void *)dev->reg_base[i]);
 273                         goto err_res;
 274                 }
 275                 mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
 276         }
 277
 278         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 279         if (res == NULL) {
 280                 dev_err(&pdev->dev, "failed to get irq resource");
 281                 ret = -ENOENT;
 282                 goto err_res;
 283         }
 284
 285         dev->dec_irq = platform_get_irq(pdev, 0);
 286         ret = devm_request_irq(&pdev->dev, dev->dec_irq,
 287                         mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
 288         if (ret) {
 289                 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
 290                         dev->dec_irq,
 291                         ret);
 292                 goto err_res;
 293         }
 294
 295         disable_irq(dev->dec_irq);
 296         mutex_init(&dev->dec_mutex);
 297         mutex_init(&dev->dev_mutex);
 298         spin_lock_init(&dev->irqlock);
 299
 300         snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
 301                 "[/MTK_V4L2_VDEC]");
 302
 303         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 304         if (ret) {
 305                 mtk_v4l2_err("v4l2_device_register err=%d", ret);
 306                 goto err_res;
 307         }
 308
 309         init_waitqueue_head(&dev->queue);
 310
 311         vfd_dec = video_device_alloc();
 312         if (!vfd_dec) {
 313                 mtk_v4l2_err("Failed to allocate video device");
 314                 ret = -ENOMEM;
 315                 goto err_dec_alloc;
 316         }
 317         vfd_dec->fops           = &mtk_vcodec_fops;
 318         vfd_dec->ioctl_ops      = &mtk_vdec_ioctl_ops;
 319         vfd_dec->release        = video_device_release;
 320         vfd_dec->lock           = &dev->dev_mutex;
 321         vfd_dec->v4l2_dev       = &dev->v4l2_dev;
 322         vfd_dec->vfl_dir        = VFL_DIR_M2M;
 323         vfd_dec->device_caps    = V4L2_CAP_VIDEO_M2M_MPLANE |
 324                         V4L2_CAP_STREAMING;
 325
 326         snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
 327                 MTK_VCODEC_DEC_NAME);
 328         video_set_drvdata(vfd_dec, dev);
 329         dev->vfd_dec = vfd_dec;
 330         platform_set_drvdata(pdev, dev);
 331
 332         dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
 333         if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
 334                 mtk_v4l2_err("Failed to init mem2mem dec device");
 335                 ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
 336                 goto err_dec_mem_init;
 337         }
 338
 339         dev->decode_workqueue =
 340                 alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
 341                         WQ_MEM_RECLAIM | WQ_FREEZABLE);
 342         if (!dev->decode_workqueue) {
 343                 mtk_v4l2_err("Failed to create decode workqueue");
 344                 ret = -EINVAL;
 345                 goto err_event_workq;
 346         }
 347
 348         ret = video_register_device(vfd_dec, VFL_TYPE_GRABBER, 0);
 349         if (ret) {
 350                 mtk_v4l2_err("Failed to register video device");
 351                 goto err_dec_reg;
 352         }
 353
 354         mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
 355                 vfd_dec->num);
 356
 357         return 0;
 358
 359 err_dec_reg:
 360         destroy_workqueue(dev->decode_workqueue);
 361 err_event_workq:
 362         v4l2_m2m_release(dev->m2m_dev_dec);
 363 err_dec_mem_init:
 364         video_unregister_device(vfd_dec);
 365 err_dec_alloc:
 366         v4l2_device_unregister(&dev->v4l2_dev);
 367 err_res:
 368         mtk_vcodec_release_dec_pm(dev);
 369         return ret;
 370 }
 371
 372 static const struct of_device_id mtk_vcodec_match[] = {
 373         {.compatible = "mediatek,mt8173-vcodec-dec",},
 374         {},
 375 };
 376
 377 MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
 378
 379 static int mtk_vcodec_dec_remove(struct platform_device *pdev)
 380 {
 381         struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
 382
 383         flush_workqueue(dev->decode_workqueue);
 384         destroy_workqueue(dev->decode_workqueue);
 385         if (dev->m2m_dev_dec)
 386                 v4l2_m2m_release(dev->m2m_dev_dec);
 387
 388         if (dev->vfd_dec)
 389                 video_unregister_device(dev->vfd_dec);
 390
 391         v4l2_device_unregister(&dev->v4l2_dev);
 392         mtk_vcodec_release_dec_pm(dev);
 393         return 0;
 394 }
 395
 396 static struct platform_driver mtk_vcodec_dec_driver = {
 397         .probe  = mtk_vcodec_probe,
 398         .remove = mtk_vcodec_dec_remove,
 399         .driver = {
 400                 .name   = MTK_VCODEC_DEC_NAME,
 401                 .of_match_table = mtk_vcodec_match,
 402         },
 403 };
 404
 405 module_platform_driver(mtk_vcodec_dec_driver);
 406
 407 MODULE_LICENSE("GPL v2");
 408 MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");