linux-kernel - Re: [PATCH v4] media: ov8856: Configure sensor for GRBG Bayer for all modes

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Date:   Mon, 18 Jan 2021 22:28:52 +0300
From:   Andrey Konovalov <andrey.konovalov@...aro.org>
To:     Robert Foss <robert.foss@...aro.org>, dongchun.zhu@...iatek.com,
        mchehab@...nel.org, linux-media@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Bingbu Cao <bingbu.cao@...ux.intel.com>
Cc:     Tomasz Figa <tfiga@...gle.com>
Subject: Re: [PATCH v4] media: ov8856: Configure sensor for GRBG Bayer for all
 modes

Oops.. I've missed a few mistypes

On 18.01.2021 22:18, Andrey Konovalov wrote:
> Hi Robert,
> 
> Thanks for you patch!
> 
> Reviewed-by: Andrey Konovalov <andrey.konovalov@...aro.org>
> 
> On 18.01.2021 22:01, Robert Foss wrote:
>> The previously added modes 3264x2448 & 1632x1224 are actually
>> configuring the sensor for BGGR mode, this is an issue since
>> the mode that is exposed through V4L incorrectly is set as GRBG.
>>
>> This patch fixes the issue by moving the output crop window of
>> internal sensor ISP uses by one row, which means that the Bayer
>> pattern of the output is changed.
>>
>> From:
>> row 1: B G B G B G ...
>> row 2: G R G R G R ...
>> raw 3: B G B G B G ...
- row
>> ...
>>
>> To:
>> raw 2: G R G R G R ...
- row
>> raw 3: B G B G B G ...
- row

Thanks,
Andrey

>> ...
>>
>> Signed-off-by: Robert Foss <robert.foss@...aro.org>
>> Suggested-by: Andrey Konovalov <andrey.konovalov@...aro.org>
>> ---
>>
>> Changes since v1:
>>   - Sakari: Added mode information to ov8856_mode struct
>>   - Sakari: enum_mbus_code updated
>>
>> Changes since v2:
>>   - Andrey: Switched approach to changing the sensor configuration
>>     to yield identical Bayer modes for all modes
>>
>> Changes since v3:
>>   - Andrey: Improve commit msg to explain Bayer shift better
>>
>>   drivers/media/i2c/ov8856.c | 4 ++--
>>   1 file changed, 2 insertions(+), 2 deletions(-)
>>
>> diff --git a/drivers/media/i2c/ov8856.c b/drivers/media/i2c/ov8856.c
>> index 2f4ceaa80593..8a355135c7db 100644
>> --- a/drivers/media/i2c/ov8856.c
>> +++ b/drivers/media/i2c/ov8856.c
>> @@ -428,7 +428,7 @@ static const struct ov8856_reg mode_3264x2448_regs[] = {
>>       {0x3810, 0x00},
>>       {0x3811, 0x04},
>>       {0x3812, 0x00},
>> -    {0x3813, 0x02},
>> +    {0x3813, 0x01},
>>       {0x3814, 0x01},
>>       {0x3815, 0x01},
>>       {0x3816, 0x00},
>> @@ -821,7 +821,7 @@ static const struct ov8856_reg mode_1632x1224_regs[] = {
>>       {0x3810, 0x00},
>>       {0x3811, 0x02},
>>       {0x3812, 0x00},
>> -    {0x3813, 0x02},
>> +    {0x3813, 0x01},
>>       {0x3814, 0x03},
>>       {0x3815, 0x01},
>>       {0x3816, 0x00},
>>