Re: [PATCH v3 8/8] [media] s5p-jpeg: Add stream error handling for Exynos5420

[Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>]

W dniu 27.06.2017 o 18:08, Thierry Escande pisze:
> From: henryhsu <henryhsu@xxxxxxxxxxxx>
>
> On Exynos5420, the STREAM_STAT bit raised on the JPGINTST register means
> there is a syntax error or an unrecoverable error on compressed file
> when ERR_INT_EN is set to 1.
>
> Fix this case and report BUF_STATE_ERROR to videobuf2.
>
> Signed-off-by: Henry-Ruey Hsu <henryhsu@xxxxxxxxxxxx>
> Signed-off-by: Thierry Escande <thierry.escande@xxxxxxxxxxxxx>

Acked-by: Andrzej Pietrasiewicz <andrzej.p@xxxxxxxxxxx>

> ---
>   drivers/media/platform/s5p-jpeg/jpeg-core.c | 9 ++++++++-
>   1 file changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/s5p-jpeg/jpeg-core.c b/drivers/media/platform/s5p-jpeg/jpeg-core.c
> index 5ad3d43..c35d169 100644
> --- a/drivers/media/platform/s5p-jpeg/jpeg-core.c
> +++ b/drivers/media/platform/s5p-jpeg/jpeg-core.c
> @@ -2812,6 +2812,7 @@ static irqreturn_t exynos3250_jpeg_irq(int irq, void *dev_id)
>   	unsigned long payload_size = 0;
>   	enum vb2_buffer_state state = VB2_BUF_STATE_DONE;
>   	bool interrupt_timeout = false;
> +	bool stream_error = false;
>   	u32 irq_status;
>   
>   	spin_lock(&jpeg->slock);
> @@ -2828,6 +2829,12 @@ static irqreturn_t exynos3250_jpeg_irq(int irq, void *dev_id)
>   
>   	jpeg->irq_status |= irq_status;
>   
> +	if (jpeg->variant->version == SJPEG_EXYNOS5420 &&
> +	    irq_status & EXYNOS3250_STREAM_STAT) {
> +		stream_error = true;
> +		dev_err(jpeg->dev, "Syntax error or unrecoverable error occurred.\n");
> +	}
> +
>   	curr_ctx = v4l2_m2m_get_curr_priv(jpeg->m2m_dev);
>   
>   	if (!curr_ctx)
> @@ -2844,7 +2851,7 @@ static irqreturn_t exynos3250_jpeg_irq(int irq, void *dev_id)
>   				EXYNOS3250_RDMA_DONE |
>   				EXYNOS3250_RESULT_STAT))
>   		payload_size = exynos3250_jpeg_compressed_size(jpeg->regs);
> -	else if (interrupt_timeout)
> +	else if (interrupt_timeout || stream_error)
>   		state = VB2_BUF_STATE_ERROR;
>   	else
>   		goto exit_unlock;