drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_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 #include <linux/pm_runtime.h>
  26
  27 #include "mtk_vcodec_drv.h"
  28 #include "mtk_vcodec_enc.h"
  29 #include "mtk_vcodec_enc_pm.h"
  30 #include "mtk_vcodec_intr.h"
  31 #include "mtk_vcodec_util.h"
  32 #include "mtk_vpu.h"
  33
  34 module_param(mtk_v4l2_dbg_level, int, S_IRUGO | S_IWUSR);
  35 module_param(mtk_vcodec_dbg, bool, S_IRUGO | S_IWUSR);
  36
  37 /* Wake up context wait_queue */
  38 static void wake_up_ctx(struct mtk_vcodec_ctx *ctx, unsigned int reason)
  39 {
  40         ctx->int_cond = 1;
  41         ctx->int_type = reason;
  42         wake_up_interruptible(&ctx->queue);
  43 }
  44
  45 static void clean_irq_status(unsigned int irq_status, void __iomem *addr)
  46 {
  47         if (irq_status & MTK_VENC_IRQ_STATUS_PAUSE)
  48                 writel(MTK_VENC_IRQ_STATUS_PAUSE, addr);
  49
  50         if (irq_status & MTK_VENC_IRQ_STATUS_SWITCH)
  51                 writel(MTK_VENC_IRQ_STATUS_SWITCH, addr);
  52
  53         if (irq_status & MTK_VENC_IRQ_STATUS_DRAM)
  54                 writel(MTK_VENC_IRQ_STATUS_DRAM, addr);
  55
  56         if (irq_status & MTK_VENC_IRQ_STATUS_SPS)
  57                 writel(MTK_VENC_IRQ_STATUS_SPS, addr);
  58
  59         if (irq_status & MTK_VENC_IRQ_STATUS_PPS)
  60                 writel(MTK_VENC_IRQ_STATUS_PPS, addr);
  61
  62         if (irq_status & MTK_VENC_IRQ_STATUS_FRM)
  63                 writel(MTK_VENC_IRQ_STATUS_FRM, addr);
  64
  65 }
  66 static irqreturn_t mtk_vcodec_enc_irq_handler(int irq, void *priv)
  67 {
  68         struct mtk_vcodec_dev *dev = priv;
  69         struct mtk_vcodec_ctx *ctx;
  70         unsigned long flags;
  71         void __iomem *addr;
  72
  73         spin_lock_irqsave(&dev->irqlock, flags);
  74         ctx = dev->curr_ctx;
  75         spin_unlock_irqrestore(&dev->irqlock, flags);
  76
  77         mtk_v4l2_debug(1, "id=%d", ctx->id);
  78         addr = dev->reg_base[VENC_SYS] + MTK_VENC_IRQ_ACK_OFFSET;
  79
  80         ctx->irq_status = readl(dev->reg_base[VENC_SYS] +
  81                                 (MTK_VENC_IRQ_STATUS_OFFSET));
  82
  83         clean_irq_status(ctx->irq_status, addr);
  84
  85         wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED);
  86         return IRQ_HANDLED;
  87 }
  88
  89 static irqreturn_t mtk_vcodec_enc_lt_irq_handler(int irq, void *priv)
  90 {
  91         struct mtk_vcodec_dev *dev = priv;
  92         struct mtk_vcodec_ctx *ctx;
  93         unsigned long flags;
  94         void __iomem *addr;
  95
  96         spin_lock_irqsave(&dev->irqlock, flags);
  97         ctx = dev->curr_ctx;
  98         spin_unlock_irqrestore(&dev->irqlock, flags);
  99
 100         mtk_v4l2_debug(1, "id=%d", ctx->id);
 101         ctx->irq_status = readl(dev->reg_base[VENC_LT_SYS] +
 102                                 (MTK_VENC_IRQ_STATUS_OFFSET));
 103
 104         addr = dev->reg_base[VENC_LT_SYS] + MTK_VENC_IRQ_ACK_OFFSET;
 105
 106         clean_irq_status(ctx->irq_status, addr);
 107
 108         wake_up_ctx(ctx, MTK_INST_IRQ_RECEIVED);
 109         return IRQ_HANDLED;
 110 }
 111
 112 static void mtk_vcodec_enc_reset_handler(void *priv)
 113 {
 114         struct mtk_vcodec_dev *dev = priv;
 115         struct mtk_vcodec_ctx *ctx;
 116
 117         mtk_v4l2_debug(0, "Watchdog timeout!!");
 118
 119         mutex_lock(&dev->dev_mutex);
 120         list_for_each_entry(ctx, &dev->ctx_list, list) {
 121                 ctx->state = MTK_STATE_ABORT;
 122                 mtk_v4l2_debug(0, "[%d] Change to state MTK_STATE_ABORT",
 123                                 ctx->id);
 124         }
 125         mutex_unlock(&dev->dev_mutex);
 126 }
 127
 128 static int fops_vcodec_open(struct file *file)
 129 {
 130         struct mtk_vcodec_dev *dev = video_drvdata(file);
 131         struct mtk_vcodec_ctx *ctx = NULL;
 132         int ret = 0;
 133
 134         ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
 135         if (!ctx)
 136                 return -ENOMEM;
 137
 138         mutex_lock(&dev->dev_mutex);
 139         /*
 140          * Use simple counter to uniquely identify this context. Only
 141          * used for logging.
 142          */
 143         ctx->id = dev->id_counter++;
 144         v4l2_fh_init(&ctx->fh, video_devdata(file));
 145         file->private_data = &ctx->fh;
 146         v4l2_fh_add(&ctx->fh);
 147         INIT_LIST_HEAD(&ctx->list);
 148         ctx->dev = dev;
 149         init_waitqueue_head(&ctx->queue);
 150
 151         ctx->type = MTK_INST_ENCODER;
 152         ret = mtk_vcodec_enc_ctrls_setup(ctx);
 153         if (ret) {
 154                 mtk_v4l2_err("Failed to setup controls() (%d)",
 155                                 ret);
 156                 goto err_ctrls_setup;
 157         }
 158         ctx->m2m_ctx = v4l2_m2m_ctx_init(dev->m2m_dev_enc, ctx,
 159                                 &mtk_vcodec_enc_queue_init);
 160         if (IS_ERR((__force void *)ctx->m2m_ctx)) {
 161                 ret = PTR_ERR((__force void *)ctx->m2m_ctx);
 162                 mtk_v4l2_err("Failed to v4l2_m2m_ctx_init() (%d)",
 163                                 ret);
 164                 goto err_m2m_ctx_init;
 165         }
 166         mtk_vcodec_enc_set_default_params(ctx);
 167
 168         if (v4l2_fh_is_singular(&ctx->fh)) {
 169                 /*
 170                  * vpu_load_firmware checks if it was loaded already and
 171                  * does nothing in that case
 172                  */
 173                 ret = vpu_load_firmware(dev->vpu_plat_dev);
 174                 if (ret < 0) {
 175                         /*
 176                          * Return 0 if downloading firmware successfully,
 177                          * otherwise it is failed
 178                          */
 179                         mtk_v4l2_err("vpu_load_firmware failed!");
 180                         goto err_load_fw;
 181                 }
 182
 183                 dev->enc_capability =
 184                         vpu_get_venc_hw_capa(dev->vpu_plat_dev);
 185                 mtk_v4l2_debug(0, "encoder capability %x", dev->enc_capability);
 186         }
 187
 188         mtk_v4l2_debug(2, "Create instance [%d]@%p m2m_ctx=%p ",
 189                         ctx->id, ctx, ctx->m2m_ctx);
 190
 191         list_add(&ctx->list, &dev->ctx_list);
 192
 193         mutex_unlock(&dev->dev_mutex);
 194         mtk_v4l2_debug(0, "%s encoder [%d]", dev_name(&dev->plat_dev->dev),
 195                         ctx->id);
 196         return ret;
 197
 198         /* Deinit when failure occurred */
 199 err_load_fw:
 200         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 201 err_m2m_ctx_init:
 202         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 203 err_ctrls_setup:
 204         v4l2_fh_del(&ctx->fh);
 205         v4l2_fh_exit(&ctx->fh);
 206         kfree(ctx);
 207         mutex_unlock(&dev->dev_mutex);
 208
 209         return ret;
 210 }
 211
 212 static int fops_vcodec_release(struct file *file)
 213 {
 214         struct mtk_vcodec_dev *dev = video_drvdata(file);
 215         struct mtk_vcodec_ctx *ctx = fh_to_ctx(file->private_data);
 216
 217         mtk_v4l2_debug(1, "[%d] encoder", ctx->id);
 218         mutex_lock(&dev->dev_mutex);
 219
 220         mtk_vcodec_enc_release(ctx);
 221         v4l2_fh_del(&ctx->fh);
 222         v4l2_fh_exit(&ctx->fh);
 223         v4l2_ctrl_handler_free(&ctx->ctrl_hdl);
 224         v4l2_m2m_ctx_release(ctx->m2m_ctx);
 225
 226         list_del_init(&ctx->list);
 227         kfree(ctx);
 228         mutex_unlock(&dev->dev_mutex);
 229         return 0;
 230 }
 231
 232 static const struct v4l2_file_operations mtk_vcodec_fops = {
 233         .owner          = THIS_MODULE,
 234         .open           = fops_vcodec_open,
 235         .release        = fops_vcodec_release,
 236         .poll           = v4l2_m2m_fop_poll,
 237         .unlocked_ioctl = video_ioctl2,
 238         .mmap           = v4l2_m2m_fop_mmap,
 239 };
 240
 241 static int mtk_vcodec_probe(struct platform_device *pdev)
 242 {
 243         struct mtk_vcodec_dev *dev;
 244         struct video_device *vfd_enc;
 245         struct resource *res;
 246         int i, j, ret;
 247
 248         dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
 249         if (!dev)
 250                 return -ENOMEM;
 251
 252         INIT_LIST_HEAD(&dev->ctx_list);
 253         dev->plat_dev = pdev;
 254
 255         dev->vpu_plat_dev = vpu_get_plat_device(dev->plat_dev);
 256         if (dev->vpu_plat_dev == NULL) {
 257                 mtk_v4l2_err("[VPU] vpu device in not ready");
 258                 return -EPROBE_DEFER;
 259         }
 260
 261         vpu_wdt_reg_handler(dev->vpu_plat_dev, mtk_vcodec_enc_reset_handler,
 262                                 dev, VPU_RST_ENC);
 263
 264         ret = mtk_vcodec_init_enc_pm(dev);
 265         if (ret < 0) {
 266                 dev_err(&pdev->dev, "Failed to get mt vcodec clock source!");
 267                 return ret;
 268         }
 269
 270         for (i = VENC_SYS, j = 0; i < NUM_MAX_VCODEC_REG_BASE; i++, j++) {
 271                 res = platform_get_resource(pdev, IORESOURCE_MEM, j);
 272                 if (res == NULL) {
 273                         dev_err(&pdev->dev, "get memory resource failed.");
 274                         ret = -ENXIO;
 275                         goto err_res;
 276                 }
 277                 dev->reg_base[i] = devm_ioremap_resource(&pdev->dev, res);
 278                 if (IS_ERR((__force void *)dev->reg_base[i])) {
 279                         ret = PTR_ERR((__force void *)dev->reg_base[i]);
 280                         goto err_res;
 281                 }
 282                 mtk_v4l2_debug(2, "reg[%d] base=0x%p", i, dev->reg_base[i]);
 283         }
 284
 285         res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
 286         if (res == NULL) {
 287                 dev_err(&pdev->dev, "failed to get irq resource");
 288                 ret = -ENOENT;
 289                 goto err_res;
 290         }
 291
 292         dev->enc_irq = platform_get_irq(pdev, 0);
 293         ret = devm_request_irq(&pdev->dev, dev->enc_irq,
 294                                mtk_vcodec_enc_irq_handler,
 295                                0, pdev->name, dev);
 296         if (ret) {
 297                 dev_err(&pdev->dev, "Failed to install dev->enc_irq %d (%d)",
 298                         dev->enc_irq,
 299                         ret);
 300                 ret = -EINVAL;
 301                 goto err_res;
 302         }
 303
 304         dev->enc_lt_irq = platform_get_irq(pdev, 1);
 305         ret = devm_request_irq(&pdev->dev,
 306                                dev->enc_lt_irq, mtk_vcodec_enc_lt_irq_handler,
 307                                0, pdev->name, dev);
 308         if (ret) {
 309                 dev_err(&pdev->dev,
 310                         "Failed to install dev->enc_lt_irq %d (%d)",
 311                         dev->enc_lt_irq, ret);
 312                 ret = -EINVAL;
 313                 goto err_res;
 314         }
 315
 316         disable_irq(dev->enc_irq);
 317         disable_irq(dev->enc_lt_irq); /* VENC_LT */
 318         mutex_init(&dev->enc_mutex);
 319         mutex_init(&dev->dev_mutex);
 320         spin_lock_init(&dev->irqlock);
 321
 322         snprintf(dev->v4l2_dev.name, sizeof(dev->v4l2_dev.name), "%s",
 323                  "[MTK_V4L2_VENC]");
 324
 325         ret = v4l2_device_register(&pdev->dev, &dev->v4l2_dev);
 326         if (ret) {
 327                 mtk_v4l2_err("v4l2_device_register err=%d", ret);
 328                 goto err_res;
 329         }
 330
 331         init_waitqueue_head(&dev->queue);
 332
 333         /* allocate video device for encoder and register it */
 334         vfd_enc = video_device_alloc();
 335         if (!vfd_enc) {
 336                 mtk_v4l2_err("Failed to allocate video device");
 337                 ret = -ENOMEM;
 338                 goto err_enc_alloc;
 339         }
 340         vfd_enc->fops           = &mtk_vcodec_fops;
 341         vfd_enc->ioctl_ops      = &mtk_venc_ioctl_ops;
 342         vfd_enc->release        = video_device_release;
 343         vfd_enc->lock           = &dev->dev_mutex;
 344         vfd_enc->v4l2_dev       = &dev->v4l2_dev;
 345         vfd_enc->vfl_dir        = VFL_DIR_M2M;
 346         vfd_enc->device_caps    = V4L2_CAP_VIDEO_M2M_MPLANE |
 347                                         V4L2_CAP_STREAMING;
 348
 349         snprintf(vfd_enc->name, sizeof(vfd_enc->name), "%s",
 350                  MTK_VCODEC_ENC_NAME);
 351         video_set_drvdata(vfd_enc, dev);
 352         dev->vfd_enc = vfd_enc;
 353         platform_set_drvdata(pdev, dev);
 354
 355         dev->m2m_dev_enc = v4l2_m2m_init(&mtk_venc_m2m_ops);
 356         if (IS_ERR((__force void *)dev->m2m_dev_enc)) {
 357                 mtk_v4l2_err("Failed to init mem2mem enc device");
 358                 ret = PTR_ERR((__force void *)dev->m2m_dev_enc);
 359                 goto err_enc_mem_init;
 360         }
 361
 362         dev->encode_workqueue =
 363                         alloc_ordered_workqueue(MTK_VCODEC_ENC_NAME,
 364                                                 WQ_MEM_RECLAIM |
 365                                                 WQ_FREEZABLE);
 366         if (!dev->encode_workqueue) {
 367                 mtk_v4l2_err("Failed to create encode workqueue");
 368                 ret = -EINVAL;
 369                 goto err_event_workq;
 370         }
 371
 372         ret = video_register_device(vfd_enc, VFL_TYPE_GRABBER, 1);
 373         if (ret) {
 374                 mtk_v4l2_err("Failed to register video device");
 375                 goto err_enc_reg;
 376         }
 377
 378         mtk_v4l2_debug(0, "encoder registered as /dev/video%d",
 379                         vfd_enc->num);
 380
 381         return 0;
 382
 383 err_enc_reg:
 384         destroy_workqueue(dev->encode_workqueue);
 385 err_event_workq:
 386         v4l2_m2m_release(dev->m2m_dev_enc);
 387 err_enc_mem_init:
 388         video_unregister_device(vfd_enc);
 389 err_enc_alloc:
 390         v4l2_device_unregister(&dev->v4l2_dev);
 391 err_res:
 392         mtk_vcodec_release_enc_pm(dev);
 393         return ret;
 394 }
 395
 396 static const struct of_device_id mtk_vcodec_enc_match[] = {
 397         {.compatible = "mediatek,mt8173-vcodec-enc",},
 398         {},
 399 };
 400 MODULE_DEVICE_TABLE(of, mtk_vcodec_enc_match);
 401
 402 static int mtk_vcodec_enc_remove(struct platform_device *pdev)
 403 {
 404         struct mtk_vcodec_dev *dev = platform_get_drvdata(pdev);
 405
 406         mtk_v4l2_debug_enter();
 407         flush_workqueue(dev->encode_workqueue);
 408         destroy_workqueue(dev->encode_workqueue);
 409         if (dev->m2m_dev_enc)
 410                 v4l2_m2m_release(dev->m2m_dev_enc);
 411
 412         if (dev->vfd_enc)
 413                 video_unregister_device(dev->vfd_enc);
 414
 415         v4l2_device_unregister(&dev->v4l2_dev);
 416         mtk_vcodec_release_enc_pm(dev);
 417         return 0;
 418 }
 419
 420 static struct platform_driver mtk_vcodec_enc_driver = {
 421         .probe  = mtk_vcodec_probe,
 422         .remove = mtk_vcodec_enc_remove,
 423         .driver = {
 424                 .name   = MTK_VCODEC_ENC_NAME,
 425                 .of_match_table = mtk_vcodec_enc_match,
 426         },
 427 };
 428
 429 module_platform_driver(mtk_vcodec_enc_driver);
 430
 431
 432 MODULE_LICENSE("GPL v2");
 433 MODULE_DESCRIPTION("Mediatek video codec V4L2 encoder driver");