LXR linux/drivers/media/platform/mtk-vcodec/mtk_vcodec

   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/module.h>
   9
  10#include "mtk_vcodec_drv.h"
  11#include "mtk_vcodec_util.h"
  12
  13/* For encoder, this will enable logs in venc/*/
  14bool mtk_vcodec_dbg;
  15EXPORT_SYMBOL(mtk_vcodec_dbg);
  16
  17/* The log level of v4l2 encoder or decoder driver.
  18 * That is, files under mtk-vcodec/.
  19 */
  20int mtk_v4l2_dbg_level;
  21EXPORT_SYMBOL(mtk_v4l2_dbg_level);
  22
  23void __iomem *mtk_vcodec_get_reg_addr(struct mtk_vcodec_ctx *data,
  24                                        unsigned int reg_idx)
  25{
  26        struct mtk_vcodec_ctx *ctx = (struct mtk_vcodec_ctx *)data;
  27
  28        if (!data || reg_idx >= NUM_MAX_VCODEC_REG_BASE) {
  29                mtk_v4l2_err("Invalid arguments, reg_idx=%d", reg_idx);
  30                return NULL;
  31        }
  32        return ctx->dev->reg_base[reg_idx];
  33}
  34EXPORT_SYMBOL(mtk_vcodec_get_reg_addr);
  35
  36int mtk_vcodec_mem_alloc(struct mtk_vcodec_ctx *data,
  37                        struct mtk_vcodec_mem *mem)
  38{
  39        unsigned long size = mem->size;
  40        struct mtk_vcodec_ctx *ctx = (struct mtk_vcodec_ctx *)data;
  41        struct device *dev = &ctx->dev->plat_dev->dev;
  42
  43        mem->va = dma_alloc_coherent(dev, size, &mem->dma_addr, GFP_KERNEL);
  44        if (!mem->va) {
  45                mtk_v4l2_err("%s dma_alloc size=%ld failed!", dev_name(dev),
  46                             size);
  47                return -ENOMEM;
  48        }
  49
  50        mtk_v4l2_debug(3, "[%d]  - va      = %p", ctx->id, mem->va);
  51        mtk_v4l2_debug(3, "[%d]  - dma     = 0x%lx", ctx->id,
  52                       (unsigned long)mem->dma_addr);
  53        mtk_v4l2_debug(3, "[%d]    size = 0x%lx", ctx->id, size);
  54
  55        return 0;
  56}
  57EXPORT_SYMBOL(mtk_vcodec_mem_alloc);
  58
  59void mtk_vcodec_mem_free(struct mtk_vcodec_ctx *data,
  60                        struct mtk_vcodec_mem *mem)
  61{
  62        unsigned long size = mem->size;
  63        struct mtk_vcodec_ctx *ctx = (struct mtk_vcodec_ctx *)data;
  64        struct device *dev = &ctx->dev->plat_dev->dev;
  65
  66        if (!mem->va) {
  67                mtk_v4l2_err("%s dma_free size=%ld failed!", dev_name(dev),
  68                             size);
  69                return;
  70        }
  71
  72        mtk_v4l2_debug(3, "[%d]  - va      = %p", ctx->id, mem->va);
  73        mtk_v4l2_debug(3, "[%d]  - dma     = 0x%lx", ctx->id,
  74                       (unsigned long)mem->dma_addr);
  75        mtk_v4l2_debug(3, "[%d]    size = 0x%lx", ctx->id, size);
  76
  77        dma_free_coherent(dev, size, mem->va, mem->dma_addr);
  78        mem->va = NULL;
  79        mem->dma_addr = 0;
  80        mem->size = 0;
  81}
  82EXPORT_SYMBOL(mtk_vcodec_mem_free);
  83
  84void mtk_vcodec_set_curr_ctx(struct mtk_vcodec_dev *dev,
  85        struct mtk_vcodec_ctx *ctx)
  86{
  87        unsigned long flags;
  88
  89        spin_lock_irqsave(&dev->irqlock, flags);
  90        dev->curr_ctx = ctx;
  91        spin_unlock_irqrestore(&dev->irqlock, flags);
  92}
  93EXPORT_SYMBOL(mtk_vcodec_set_curr_ctx);
  94
  95struct mtk_vcodec_ctx *mtk_vcodec_get_curr_ctx(struct mtk_vcodec_dev *dev)
  96{
  97        unsigned long flags;
  98        struct mtk_vcodec_ctx *ctx;
  99
 100        spin_lock_irqsave(&dev->irqlock, flags);
 101        ctx = dev->curr_ctx;
 102        spin_unlock_irqrestore(&dev->irqlock, flags);
 103        return ctx;
 104}
 105EXPORT_SYMBOL(mtk_vcodec_get_curr_ctx);
 106
 107MODULE_LICENSE("GPL v2");
 108MODULE_DESCRIPTION("Mediatek video codec driver");
 109