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    Subject[PATCH v11, 01/19] media: mtk-vcodec: Get numbers of register bases from DT
    Date
    Different platform may has different numbers of register bases. Gets the
    numbers of register bases from DT (sizeof(u32) * 4 bytes for each).

    Reviewed-by: Tzung-Bi Shih<tzungbi@google.com>
    Signed-off-by: Yunfei Dong <yunfei.dong@mediatek.com>
    ---
    .../platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 37 ++++++++++++++-----
    1 file changed, 28 insertions(+), 9 deletions(-)

    diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
    index e6e6a8203eeb..59caf2163349 100644
    --- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
    +++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
    @@ -78,6 +78,30 @@ static irqreturn_t mtk_vcodec_dec_irq_handler(int irq, void *priv)
    return IRQ_HANDLED;
    }

    +static int mtk_vcodec_get_reg_bases(struct mtk_vcodec_dev *dev)
    +{
    + struct platform_device *pdev = dev->plat_dev;
    + int reg_num, i;
    +
    + /* Sizeof(u32) * 4 bytes for each register base. */
    + reg_num = of_property_count_elems_of_size(pdev->dev.of_node, "reg",
    + sizeof(u32) * 4);
    + if (reg_num <= 0 || reg_num > NUM_MAX_VDEC_REG_BASE) {
    + dev_err(&pdev->dev, "Invalid register property size: %d\n", reg_num);
    + return -EINVAL;
    + }
    +
    + for (i = 0; i < reg_num; i++) {
    + dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
    + if (IS_ERR(dev->reg_base[i]))
    + return PTR_ERR(dev->reg_base[i]);
    +
    + mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
    + }
    +
    + return 0;
    +}
    +
    static int fops_vcodec_open(struct file *file)
    {
    struct mtk_vcodec_dev *dev = video_drvdata(file);
    @@ -206,7 +230,7 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
    struct resource *res;
    phandle rproc_phandle;
    enum mtk_vcodec_fw_type fw_type;
    - int i, ret;
    + int ret;

    dev = devm_kzalloc(&pdev->dev, sizeof(*dev), GFP_KERNEL);
    if (!dev)
    @@ -238,14 +262,9 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
    goto err_dec_pm;
    }

    - for (i = 0; i < NUM_MAX_VDEC_REG_BASE; i++) {
    - dev->reg_base[i] = devm_platform_ioremap_resource(pdev, i);
    - if (IS_ERR((__force void *)dev->reg_base[i])) {
    - ret = PTR_ERR((__force void *)dev->reg_base[i]);
    - goto err_res;
    - }
    - mtk_v4l2_debug(2, "reg[%d] base=%p", i, dev->reg_base[i]);
    - }
    + ret = mtk_vcodec_get_reg_bases(dev);
    + if (ret)
    + goto err_res;

    res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
    if (res == NULL) {
    --
    2.25.1
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