linux-kernel - Re: [PATCH 04/17] media: camss: csid-170: fix non-10bit formats

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Date:   Tue, 25 May 2021 21:15:10 +0300
From:   Andrey Konovalov <andrey.konovalov@...aro.org>
To:     Jonathan Marek <jonathan@...ek.ca>, linux-arm-msm@...r.kernel.org
Cc:     robert.foss@...aro.org, Todor Tomov <todor.too@...il.com>,
        Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        "open list:QUALCOMM CAMERA SUBSYSTEM DRIVER" 
        <linux-media@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/17] media: camss: csid-170: fix non-10bit formats

Hi Jonathan,

Thank you for your patch!

On 11.05.2021 21:07, Jonathan Marek wrote:
> Use the decode_format/data_type from the "format" struct instead of a
> hardcoded 10-bit format.
> 
> Fixes: eebe6d00e9bf ("media: camss: Add support for CSID hardware version Titan 170")
> Signed-off-by: Jonathan Marek <jonathan@...ek.ca>
> ---
>   drivers/media/platform/qcom/camss/camss-csid-170.c | 6 +++---
>   1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/media/platform/qcom/camss/camss-csid-170.c b/drivers/media/platform/qcom/camss/camss-csid-170.c
> index ac22ff29d2a9..a81cc94c075f 100644
> --- a/drivers/media/platform/qcom/camss/camss-csid-170.c
> +++ b/drivers/media/platform/qcom/camss/camss-csid-170.c
> @@ -366,7 +366,7 @@ static void csid_configure_stream(struct csid_device *csid, u8 enable)
>   			val |= input_format->width & 0x1fff << TPG_DT_n_CFG_0_FRAME_WIDTH;
>   			writel_relaxed(val, csid->base + CSID_TPG_DT_n_CFG_0(0));
>   
> -			val = DATA_TYPE_RAW_10BIT << TPG_DT_n_CFG_1_DATA_TYPE;
> +			val = format->data_type << TPG_DT_n_CFG_1_DATA_TYPE;
>   			writel_relaxed(val, csid->base + CSID_TPG_DT_n_CFG_1(0));
>   
>   			val = tg->mode << TPG_DT_n_CFG_2_PAYLOAD_MODE;
> @@ -382,8 +382,8 @@ static void csid_configure_stream(struct csid_device *csid, u8 enable)
>   		val = 1 << RDI_CFG0_BYTE_CNTR_EN;
>   		val |= 1 << RDI_CFG0_FORMAT_MEASURE_EN;
>   		val |= 1 << RDI_CFG0_TIMESTAMP_EN;
> -		val |= DECODE_FORMAT_PAYLOAD_ONLY << RDI_CFG0_DECODE_FORMAT;
> -		val |= DATA_TYPE_RAW_10BIT << RDI_CFG0_DATA_TYPE;
> +		val |= format->decode_format << RDI_CFG0_DECODE_FORMAT;
> +		val |= format->data_type << RDI_CFG0_DATA_TYPE;

I've given it a try on RB3 board (aka db845c plus the navigation mezzanine), which uses ov8856 camera
sensor (its output format is SGRBG10_1X10).

The above change doesn't work for me because format->decode_format has the value of 0x02 (which is
DECODE_FORMAT_UNCOMPRESSED_10_BIT). format->data_type has the expected value of 0x2b (DATA_TYPE_RAW_10BIT).

Thanks,
Andrey

>   		val |= vc << RDI_CFG0_VIRTUAL_CHANNEL;
>   		val |= dt_id << RDI_CFG0_DT_ID;
>   		writel_relaxed(val, csid->base + CSID_RDI_CFG0(0));
>