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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Copyright (c) 2016 MediaTek Inc.
   4  * Author: PC Chen <pc.chen@mediatek.com>
   5  *         Tiffany Lin <tiffany.lin@mediatek.com>
   6  */
   7
   8 #include <linux/slab.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/irq.h>
  11 #include <linux/module.h>
  12 #include <linux/of_device.h>
  13 #include <linux/of.h>
  14 #include <media/v4l2-event.h>
  15 #include <media/v4l2-mem2mem.h>
  16 #include <media/videobuf2-dma-contig.h>
  17
  18 #include "mtk_vcodec_drv.h"
  19 #include "mtk_vcodec_dec.h"
  20 #include "mtk_vcodec_dec_pm.h"
  21 #include "mtk_vcodec_intr.h"
  22 #include "mtk_vcodec_util.h"
  23 #include "mtk_vcodec_fw.h"
  24
  25 #define VDEC_HW_ACTIVE  0x10
  26 #define VDEC_IRQ_CFG    0x11
  27 #define VDEC_IRQ_CLR    0x10
  28 #define VDEC_IRQ_CFG_REG        0xa4
  29
  30 module_param(mtk_v4l2_dbg_level, int, 0644);
  31 module_param(mtk_vcodec_dbg, bool, 0644);
  32
  33 /* Wake up context wait_queue */
  34 static void wake_up_ctx(struct mtk_vcodec_ctx *ctx)
  35 {
  36         ctx->int_cond = 1;
  37         wake_up_interruptible(&ctx->queue);
  38 }
  39
  40 static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
  41 {
  42         struct mtk_vcodec_dev *dev = priv;
  43         struct mtk_vcodec_ctx *ctx;
  44         u32 cg_status = 0;
  45         unsigned int dec_done_status = 0;
  46         void __iomem *vdec_misc_addr = dev->reg_base[VDEC_MISC] +
  47                                         VDEC_IRQ_CFG_REG;
  48
  49         ctx = mtk_vcodec_get_curr_ctx(dev);
  50
  51         /* check if HW active or not */
  52         cg_status = readl(dev->reg_base[0]);
  53         if ((cg_status & VDEC_HW_ACTIVE) != 0) {
  54                 mtk_v4l2_err("DEC ISR, VDEC active is not 0x0 (0x%08x)",
  55                              cg_status);
  56                 return IRQ_HANDLED;
  57         }
  58
  59         dec_done_status = readl(vdec_misc_addr);
  60         ctx->irq_status = dec_done_status;
  61         if ((dec_done_status & MTK_VDEC_IRQ_STATUS_DEC_SUCCESS) !=
  62                 MTK_VDEC_IRQ_STATUS_DEC_SUCCESS)
  63                 return IRQ_HANDLED;
  64
  65         /* clear interrupt */
  66         writel((readl(vdec_misc_addr) | VDEC_IRQ_CFG),
  67                 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
  68         writel((readl(vdec_misc_addr) & ~VDEC_IRQ_CLR),
  69                 dev->reg_base[VDEC_MISC] + VDEC_IRQ_CFG_REG);
  70
  71         wake_up_ctx(ctx);
  72
  73         mtk_v4l2_debug(3,
  74                         "mtk_vcodec_dec_irq_handler :wake up ctx %d, dec_done_status=%x",
  75                         ctx->id, dec_done_status);
  76
  77         return IRQ_HANDLED;
  78 }
  79
  80 static int fops_vcodec_open(struct file *file)
  81 {
  82         struct mtk_vcodec_dev *dev = video_drvdata(file);
  83         struct mtk_vcodec_ctx *ctx = NULL;
  84         struct mtk_video_dec_buf *mtk_buf = NULL;
  85         int ret = 0;
  86         struct vb2_queue *src_vq;
  87
  88         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
  89         if (!ctx)
  90                 return -ENOMEM;
  91         mtk_buf = kzalloc(sizeof(*mtk_buf), GFP_KERNEL);
  92         if (!mtk_buf) {
  93                 kfree(ctx);
  94                 return -ENOMEM;
  95         }
  96
  97         mutex_lock(&dev->dev_mutex);
  98         ctx->empty_flush_buf = mtk_buf;
  99         ctx->id = dev->id_counter++;
 100         v4l2_fh_init(&ctx->fh, video_devdata(file));
 101         file->private_data = &ctx->fh;
 102         v4l2_fh_add(&ctx->fh);
 103         INIT_LIST_HEAD(&ctx->list);
 104         ctx->dev = dev;
 105         init_waitqueue_head(&ctx->queue);
 106         mutex_init(&ctx->lock);
 107
 108         ctx->type = MTK_INST_DECODER;
 109         ret = mtk_vcodec_dec_ctrls_setup(ctx);
 110         if (ret) {
 111                 mtk_v4l2_err("Failed to setup mt vcodec controls");
 112                 goto err_ctrls_setup;
 113         }
 114         ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_dec, ctx,
 115                 &mtk_vcodec_dec_queue_init);
 116         if (IS_ERR((__force void *)ctx->m2m_ctx)) {
 117                 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
 118                 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
 119                         ret);
 120                 goto err_m2m_ctx_init;
 121         }
 122         src_vq = v4l2_m2m_get_vq(ctx->m2m_ctx,
 123                                 V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE);
 124         ctx->empty_flush_buf->m2m_buf.vb.vb2_buf.vb2_queue = src_vq;
 125         ctx->empty_flush_buf->lastframe = true;
 126         mtk_vcodec_dec_set_default_params(ctx);
 127
 128         if (v4l2_fh_is_singular(&ctx->fh)) {
 129                 mtk_vcodec_dec_pw_on(&dev->pm);
 130                 /*
 131                  * Does nothing if firmware was already loaded.
 132                  */
 133                 ret = mtk_vcodec_fw_load_firmware(dev->fw_handler);
 134                 if (ret < 0) {
 135                         /*
 136                          * Return 0 if downloading firmware successfully,
 137                          * otherwise it is failed
 138                          */
 139                         mtk_v4l2_err("failed to load firmware!");
 140                         goto err_load_fw;
 141                 }
 142
 143                 dev->dec_capability =
 144                         mtk_vcodec_fw_get_vdec_capa(dev->fw_handler);
 145                 mtk_v4l2_debug(0, "decoder capability %x", dev->dec_capability);
 146         }
 147
 148         list_add(&ctx->list, &dev->ctx_list);
 149
 150         mutex_unlock(&dev->dev_mutex);
 151         mtk_v4l2_debug(0, "%s decoder [%d]", dev_name(&dev->plat_dev->dev),
 152                         ctx->id);
 153         return ret;
 154
 155         /* Deinit when failure occurred */
 156 err_load_fw:
 157         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 158 err_m2m_ctx_init:
 159         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 160 err_ctrls_setup:
 161         v4l2_fh_del(&ctx->fh);
 162         v4l2_fh_exit(&ctx->fh);
 163         kfree(ctx->empty_flush_buf);
 164         kfree(ctx);
 165         mutex_unlock(&dev->dev_mutex);
 166
 167         return ret;
 168 }
 169
 170 static int fops_vcodec_release(struct file *file)
 171 {
 172         struct mtk_vcodec_dev *dev = video_drvdata(file);
 173         struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
 174
 175         mtk_v4l2_debug(0, "[%d] decoder", ctx->id);
 176         mutex_lock(&dev->dev_mutex);
 177
 178         /*
 179          * Call v4l2_m2m_ctx_release before mtk_vcodec_dec_release. First, it
 180          * makes sure the worker thread is not running after vdec_if_deinit.
 181          * Second, the decoder will be flushed and all the buffers will be
 182          * returned in stop_streaming.
 183          */
 184         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 185         mtk_vcodec_dec_release(ctx);
 186
 187         if (v4l2_fh_is_singular(&ctx->fh))
 188                 mtk_vcodec_dec_pw_off(&dev->pm);
 189         v4l2_fh_del(&ctx->fh);
 190         v4l2_fh_exit(&ctx->fh);
 191         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 192
 193         list_del_init(&ctx->list);
 194         kfree(ctx->empty_flush_buf);
 195         kfree(ctx);
 196         mutex_unlock(&dev->dev_mutex);
 197         return 0;
 198 }
 199
 200 static const struct v4l2_file_operations mtk_vcodec_fops = {
 201         .owner          = THIS_MODULE,
 202         .open           = fops_vcodec_open,
 203         .release        = fops_vcodec_release,
 204         .poll           = v4l2_m2m_fop_poll,
 205         .unlocked_ioctl = video_ioctl2,
 206         .mmap           = v4l2_m2m_fop_mmap,
 207 };
 208
 209 static int mtk_vcodec_probe(struct platform_device *pdev)
 210 {
 211         struct mtk_vcodec_dev *dev;
 212         struct video_device *vfd_dec;
 213         struct resource *res;
 214         phandle rproc_phandle;
 215         enum mtk_vcodec_fw_type fw_type;
 216         int i, ret;
 217
 218         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 219         if (!dev)
 220                 return -ENOMEM;
 221
 222         INIT_LIST_HEAD(&dev->ctx_list);
 223         dev->plat_dev = pdev;
 224
 225         if (!of_property_read_u32(pdev->dev.of_node, "mediatek,vpu",
 226                                   &rproc_phandle)) {
 227                 fw_type = VPU;
 228         } else if (!of_property_read_u32(pdev->dev.of_node, "mediatek,scp",
 229                                          &rproc_phandle)) {
 230                 fw_type = SCP;
 231         } else {
 232                 mtk_v4l2_err("Could not get vdec IPI device");
 233                 return -ENODEV;
 234         }
 235         dma_set_max_seg_size(&pdev->dev, UINT_MAX);
 236
 237         dev->fw_handler = mtk_vcodec_fw_select(dev, fw_type, DECODER);
 238         if (IS_ERR(dev->fw_handler))
 239                 return PTR_ERR(dev->fw_handler);
 240
 241         ret = mtk_vcodec_init_dec_pm(dev);
 242         if (ret < 0) {
 243                 dev_err(&pdev->dev, "Failed to get mt vcodec clock source");
 244                 goto err_dec_pm;
 245         }
 246
 247         for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
 248                 dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
 249                 if (IS_ERR((__force void *)dev->reg_base[i])) {
 250                         ret = PTR_ERR((__force void *)dev->reg_base[i]);
 251                         goto err_res;
 252                 }
 253                 mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
 254         }
 255
 256         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 257         if (res == NULL) {
 258                 dev_err(&pdev->dev, "failed to get irq resource");
 259                 ret = -ENOENT;
 260                 goto err_res;
 261         }
 262
 263         dev->dec_irq = platform_get_irq(pdev, 0);
 264         irq_set_status_flags(dev->dec_irq, IRQ_NOAUTOEN);
 265         ret = devm_request_irq(&pdev->dev, dev->dec_irq,
 266                         mtk_vcodec_dec_irq_handler, 0, pdev->name, dev);
 267         if (ret) {
 268                 dev_err(&pdev->dev, "Failed to install dev->dec_irq %d (%d)",
 269                         dev->dec_irq,
 270                         ret);
 271                 goto err_res;
 272         }
 273
 274         mutex_init(&dev->dec_mutex);
 275         mutex_init(&dev->dev_mutex);
 276         spin_lock_init(&dev->irqlock);
 277
 278         snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
 279                 "[/MTK_V4L2_VDEC]");
 280
 281         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 282         if (ret) {
 283                 mtk_v4l2_err("v4l2_device_register err=%d", ret);
 284                 goto err_res;
 285         }
 286
 287         init_waitqueue_head(&dev->queue);
 288
 289         vfd_dec = video_device_alloc();
 290         if (!vfd_dec) {
 291                 mtk_v4l2_err("Failed to allocate video device");
 292                 ret = -ENOMEM;
 293                 goto err_dec_alloc;
 294         }
 295         vfd_dec->fops           = &mtk_vcodec_fops;
 296         vfd_dec->ioctl_ops      = &mtk_vdec_ioctl_ops;
 297         vfd_dec->release        = video_device_release;
 298         vfd_dec->lock           = &dev->dev_mutex;
 299         vfd_dec->v4l2_dev       = &dev->v4l2_dev;
 300         vfd_dec->vfl_dir        = VFL_DIR_M2M;
 301         vfd_dec->device_caps    = V4L2_CAP_VIDEO_M2M_MPLANE |
 302                         V4L2_CAP_STREAMING;
 303
 304         snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
 305                 MTK_VCODEC_DEC_NAME);
 306         video_set_drvdata(vfd_dec, dev);
 307         dev->vfd_dec = vfd_dec;
 308         platform_set_drvdata(pdev, dev);
 309
 310         dev->m2m_dev_dec = v4l2_m2m_init(&mtk_vdec_m2m_ops);
 311         if (IS_ERR((__force void *)dev->m2m_dev_dec)) {
 312                 mtk_v4l2_err("Failed to init mem2mem dec device");
 313                 ret = PTR_ERR((__force void *)dev->m2m_dev_dec);
 314                 goto err_dec_mem_init;
 315         }
 316
 317         dev->decode_workqueue =
 318                 alloc_ordered_workqueue(MTK_VCODEC_DEC_NAME,
 319                         WQ_MEM_RECLAIM | WQ_FREEZABLE);
 320         if (!dev->decode_workqueue) {
 321                 mtk_v4l2_err("Failed to create decode workqueue");
 322                 ret = -EINVAL;
 323                 goto err_event_workq;
 324         }
 325
 326         ret = video_register_device(vfd_dec, VFL_TYPE_VIDEO, 0);
 327         if (ret) {
 328                 mtk_v4l2_err("Failed to register video device");
 329                 goto err_dec_reg;
 330         }
 331
 332         mtk_v4l2_debug(0, "decoder registered as /dev/video%d",
 333                 vfd_dec->num);
 334
 335         return 0;
 336
 337 err_dec_reg:
 338         destroy_workqueue(dev->decode_workqueue);
 339 err_event_workq:
 340         v4l2_m2m_release(dev->m2m_dev_dec);
 341 err_dec_mem_init:
 342         video_unregister_device(vfd_dec);
 343 err_dec_alloc:
 344         v4l2_device_unregister(&dev->v4l2_dev);
 345 err_res:
 346         mtk_vcodec_release_dec_pm(dev);
 347 err_dec_pm:
 348         mtk_vcodec_fw_release(dev->fw_handler);
 349         return ret;
 350 }
 351
 352 static const struct of_device_id mtk_vcodec_match[] = {
 353         {.compatible = "mediatek,mt8173-vcodec-dec",},
 354         {},
 355 };
 356
 357 MODULE_DEVICE_TABLE(of, mtk_vcodec_match);
 358
 359 static int mtk_vcodec_dec_remove(struct platform_device *pdev)
 360 {
 361         struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
 362
 363         flush_workqueue(dev->decode_workqueue);
 364         destroy_workqueue(dev->decode_workqueue);
 365         if (dev->m2m_dev_dec)
 366                 v4l2_m2m_release(dev->m2m_dev_dec);
 367
 368         if (dev->vfd_dec)
 369                 video_unregister_device(dev->vfd_dec);
 370
 371         v4l2_device_unregister(&dev->v4l2_dev);
 372         mtk_vcodec_release_dec_pm(dev);
 373         mtk_vcodec_fw_release(dev->fw_handler);
 374         return 0;
 375 }
 376
 377 static struct platform_driver mtk_vcodec_dec_driver = {
 378         .probe  = mtk_vcodec_probe,
 379         .remove = mtk_vcodec_dec_remove,
 380         .driver = {
 381                 .name   = MTK_VCODEC_DEC_NAME,
 382                 .of_match_table = mtk_vcodec_match,
 383         },
 384 };
 385
 386 module_platform_driver(mtk_vcodec_dec_driver);
 387
 388 MODULE_LICENSE("GPL v2");
 389 MODULE_DESCRIPTION("Mediatek video codec V4L2 decoder driver");