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Subject: Re: [PATCH 04/17] media: camss: csid-170: fix non-10bit formats
To:     Andrey Konovalov <andrey.konovalov@linaro.org>,
        linux-arm-msm@vger.kernel.org
Cc:     robert.foss@linaro.org, Todor Tomov <todor.too@gmail.com>,
        Andy Gross <agross@kernel.org>,
        Bjorn Andersson <bjorn.andersson@linaro.org>,
        Mauro Carvalho Chehab <mchehab@kernel.org>,
        Hans Verkuil <hverkuil-cisco@xs4all.nl>,
        "open list:QUALCOMM CAMERA SUBSYSTEM DRIVER" 
        <linux-media@vger.kernel.org>,
        open list <linux-kernel@vger.kernel.org>
References: <20210511180728.23781-1-jonathan@marek.ca>
 <20210511180728.23781-5-jonathan@marek.ca>
 <fd72befe-f39c-ecb0-1130-50aa8452a90e@linaro.org>
From:   Jonathan Marek <jonathan@marek.ca>
Message-ID: <99f482de-78f8-82da-e52b-7f76da67ff39@marek.ca>
Date:   Tue, 25 May 2021 14:38:42 -0400
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On 5/25/21 2:15 PM, Andrey Konovalov wrote:
> 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@marek.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).
> 

I will change it back to using DECODE_FORMAT_PAYLOAD_ONLY for the v2, 
since it does seem like this is the correct value for the RDI path.

(but IIRC, using DECODE_FORMAT_UNCOMPRESSED_10_BIT worked on RB3 with 
the ov8856 camera last year when I brought it up. maybe the VFE or 
another register is configured differently)

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