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Subject: Re: [RFC PATCH v3 16/18] gpu: host1x: mipi: Split
 tegra_mipi_calibrate and tegra_mipi_wait
To:     Dmitry Osipenko <digetx@gmail.com>, <thierry.reding@gmail.com>,
        <jonathanh@nvidia.com>, <frankc@nvidia.com>, <hverkuil@xs4all.nl>,
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From:   Sowjanya Komatineni <skomatineni@nvidia.com>
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On 7/16/20 4:01 PM, Dmitry Osipenko wrote:
> 17.07.2020 01:49, Sowjanya Komatineni =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
>>> What keeps MIPI clock enabled after completion of the
>>> tegra_mipi_calibrate() invocation?
>> MIPI clock is disabled at end of tegra_mipi_calibrate and is re-enabled
>> during tegra_mipi_wait.
>>
>> I think I should fix this to keep the clock enabled till calibration
>> results are latched.
>>
>> All consumers of tegra_mipi_calibrate() will call tegra_mipi_wait().
>>
>> So will remove clk_disable mipi clk at end of tegra_mipi_calibrate() and
>> clk_enable mipi_clk at beginning of tegra_mipi_wait()
> Isn't it possible to perform the calibration after enabling CSI and
> before of starting the sensor streaming?
Currently this is what I am doing. Triggering calibration start during=20
CSI receiver being ready and then sensor streaming will happen where=20
internal MIPI CAL detects for LP -> HS transition and applies results to=20
pads. So checking for calibration results after sensor stream is enabled