linux-kernel - Re: [PATCH v2,9/9] media: mtk-jpegenc: Refactor jpegenc device run interface

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Date:   Tue, 6 Jul 2021 19:01:00 +0800
From:   Tzung-Bi Shih <tzungbi@...gle.com>
To:     "kyrie.wu" <kyrie.wu@...iatek.com>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Bin Liu <bin.liu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tzung-Bi Shih <tzungbi@...omium.org>,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        linux-media@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Tomasz Figa <tfiga@...omium.org>, xia.jiang@...iatek.com,
        maoguang.meng@...iatek.com, srv_heupstream@...iatek.com
Subject: Re: [PATCH v2,9/9] media: mtk-jpegenc: Refactor jpegenc device run interface

On Wed, Jun 30, 2021 at 3:32 PM kyrie.wu <kyrie.wu@...iatek.com> wrote:
> modify jpegenc device run func interface and add worker for encode
The description makes less sense.

> +static void mtk_jpegenc_worker(struct work_struct *work)
>  {
> -       struct mtk_jpeg_ctx *ctx = priv;
> +       struct mtk_jpeg_ctx *ctx = container_of(work, struct mtk_jpeg_ctx,
> +               jpeg_work);
>         struct mtk_jpeg_dev *jpeg = ctx->jpeg;
> +       struct mtk_jpeg_dev *comp_jpeg[MTK_JPEGENC_HW_MAX];
>         struct vb2_v4l2_buffer *src_buf, *dst_buf;
>         enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
>         unsigned long flags;
> -       int ret;
> +       struct mtk_jpeg_src_buf *jpeg_src_buf, *jpeg_dst_buf;
> +       int ret, i, hw_id = 0;
hw_id doesn't need to be initialized.

> +retry_select:
> +       hw_id = mtk_jpeg_select_hw(ctx);
> +       if (hw_id < 0) {
> +               ret = wait_event_interruptible(jpeg->hw_wq,
> +                               (atomic_read(hw_rdy[0]) ||
> +                               atomic_read(hw_rdy[1])) > 0);
Hard-coded refers to hw_rdy[0] and hw_rdy[1] here?

> -       mtk_jpeg_enc_reset(jpeg->reg_base);
> -
> -       mtk_jpeg_set_enc_src(ctx, jpeg->reg_base, &src_buf->vb2_buf);
> -       mtk_jpeg_set_enc_dst(ctx, jpeg->reg_base, &dst_buf->vb2_buf);
> -       mtk_jpeg_set_enc_params(ctx, jpeg->reg_base);
> -       mtk_jpeg_enc_start(jpeg->reg_base);
> -       spin_unlock_irqrestore(&jpeg->hw_lock, flags);
> +       spin_lock_irqsave(&comp_jpeg[hw_id]->hw_lock, flags);
> +       mtk_jpeg_enc_reset(comp_jpeg[hw_id]->reg_base[0]);
> +       mtk_jpeg_set_enc_dst(ctx,
> +                            comp_jpeg[hw_id]->reg_base[0],
> +                            &dst_buf->vb2_buf);
> +       mtk_jpeg_set_enc_src(ctx,
> +                            comp_jpeg[hw_id]->reg_base[0],
> +                            &src_buf->vb2_buf);
> +       mtk_jpeg_set_enc_params(ctx, comp_jpeg[hw_id]->reg_base[0]);
> +       mtk_jpeg_enc_start(comp_jpeg[hw_id]->reg_base[0]);
Why it uses reg_base[0]?