Date:   Fri, 3 Dec 2021 16:07:36 +0100
From:   Ricardo Ribalda <ribalda@chromium.org>
To:     "kyrie.wu" <kyrie.wu@mediatek.com>
Cc:     Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Rob Herring <robh+dt@kernel.org>,
        Tomasz Figa <tfiga@chromium.org>,
        Matthias Brugger <matthias.bgg@gmail.com>,
        Tzung-Bi Shih <tzungbi@chromium.org>,
        Project_Global_Chrome_Upstream_Group@mediatek.com,
        linux-media@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-mediatek@lists.infradead.org, xia.jiang@mediatek.com,
        maoguang.meng@mediatek.com, srv_heupstream@mediatek.com,
        irui.wang@mediatek.com
Subject: Re: [PATCH V6, 3/5] media: mtk-jpegenc: add jpegenc timeout func
 interface
Message-ID: <YaoyuAFD8IaSij6S@gmail.com>
References: <1638501230-13417-1-git-send-email-kyrie.wu@mediatek.com>
 <1638501230-13417-4-git-send-email-kyrie.wu@mediatek.com>
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In-Reply-To: <1638501230-13417-4-git-send-email-kyrie.wu@mediatek.com>
Precedence: bulk

kyrie.wu wrote:

> Generalizes jpegenc timeout func interfaces to handle HW timeout.

Where do you call schedule_delayed_work() and init hw_param?
> 
> Signed-off-by: kyrie.wu <kyrie.wu@mediatek.com>
> ---
> V6: no change
> ---
>  drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h   |  8 ++++++++
>  drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c | 23 +++++++++++++++++++++++
>  2 files changed, 31 insertions(+)
> 
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> index 7d013de..baab305 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_core.h
> @@ -75,6 +75,12 @@ struct mtk_jpeg_variant {
>  	u32 cap_q_default_fourcc;
>  };
>  
> +struct mtk_jpeg_hw_param {
> +	struct vb2_v4l2_buffer *src_buffer;
> +	struct vb2_v4l2_buffer *dst_buffer;
> +	struct mtk_jpeg_ctx *curr_ctx;
> +};
> +
>  enum mtk_jpegenc_hw_id {
>  	MTK_JPEGENC_HW0,
>  	MTK_JPEGENC_HW1,
> @@ -122,6 +128,8 @@ struct mtk_jpegenc_comp_dev {
>  	struct mtk_jpeg_dev *master_dev;
>  	struct mtk_jpegenc_pm pm;
>  	int jpegenc_irq;
> +	struct delayed_work job_timeout_work;
> +	struct mtk_jpeg_hw_param hw_param;
>  };
>  
>  /**
> diff --git a/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c b/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c
> index 4ccda1d..e62b875 100644
> --- a/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c
> +++ b/drivers/media/platform/mtk-jpeg/mtk_jpeg_enc_hw.c
> @@ -183,6 +183,24 @@ void mtk_jpeg_set_enc_params(struct mtk_jpeg_ctx *ctx,  void __iomem *base)
>  	writel(ctx->restart_interval, base + JPEG_ENC_RST_MCU_NUM);
>  }
>  
> +static void mtk_jpegenc_timeout_work(struct work_struct *work)
> +{
> +	struct delayed_work *Pwork =
> +		container_of(work, struct delayed_work, work);
Please use to_delayed_work()
> +	struct mtk_jpegenc_comp_dev *cjpeg =
> +		container_of(Pwork, struct mtk_jpegenc_comp_dev,
> +		job_timeout_work);
> +	enum vb2_buffer_state buf_state = VB2_BUF_STATE_ERROR;
> +	struct vb2_v4l2_buffer *src_buf;
> +
> +	src_buf = cjpeg->hw_param.src_buffer;
> +
> +	mtk_jpeg_enc_reset(cjpeg->reg_base);
> +	clk_disable_unprepare(cjpeg->pm.venc_clk.clk_info->jpegenc_clk);
> +	pm_runtime_put(cjpeg->pm.dev);
> +	v4l2_m2m_buf_done(src_buf, buf_state);
> +}
> +
>  static irqreturn_t mtk_jpegenc_hw_irq_handler(int irq, void *priv)
>  {
>  	struct vb2_v4l2_buffer *src_buf, *dst_buf;
> @@ -194,6 +212,8 @@ static irqreturn_t mtk_jpegenc_hw_irq_handler(int irq, void *priv)
>  	struct mtk_jpegenc_comp_dev *jpeg = priv;
>  	struct mtk_jpeg_dev *master_jpeg = jpeg->master_dev;
>  
> +	cancel_delayed_work(&jpeg->job_timeout_work);
Isn't here a race condition is the delayed work is being exectuted?
> +
>  	irq_status = readl(jpeg->reg_base + JPEG_ENC_INT_STS) &
>  		JPEG_ENC_INT_STATUS_MASK_ALLIRQ;
>  	if (irq_status)
> @@ -322,6 +342,9 @@ static int mtk_jpegenc_hw_probe(struct platform_device *pdev)
>  
>  	dev->plat_dev = pdev;
>  
> +	INIT_DELAYED_WORK(&dev->job_timeout_work,
> +		mtk_jpegenc_timeout_work);
> +
>  	ret = mtk_jpegenc_init_pm(dev);
>  	if (ret) {
>  		dev_err(&pdev->dev, "Failed to get jpeg enc clock source");
> -- 
> 2.6.4
> 
> 
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