linux-kernel - Re: [PATCH 13/13] media: qcom: camss: Add support for VFE hardware version Titan 780

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Message-ID: <5ecbcd10-d9b7-4134-9666-6df790527b1f@quicinc.com>
Date: Thu, 15 Aug 2024 23:43:02 +0800
From: Depeng Shao <quic_depengs@...cinc.com>
To: Vladimir Zapolskiy <vladimir.zapolskiy@...aro.org>, <rfoss@...nel.org>,
        <todor.too@...il.com>, <bryan.odonoghue@...aro.org>,
        <mchehab@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
        <conor+dt@...nel.org>
CC: <linux-arm-msm@...r.kernel.org>, <linux-media@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <kernel@...cinc.com>, Yongsheng Li <quic_yon@...cinc.com>
Subject: Re: [PATCH 13/13] media: qcom: camss: Add support for VFE hardware
 version Titan 780

Hi Vladimir,

>>
>> Thanks for the confirmation, even though I add the rup_update and
>> buf_done function in later commits, it is still called in platform
>> specific code(camss-vfe-780.c), so I will keep as it is done today.
> 
> let it be so.
> 
> I have another ask about it, please move new camss_reg_update() out from
> camss.c into camss-csid.c, and camss_buf_done() from camss.c into camss- 
> vfe.c
> 

The cross direct call has been removed by below commit, so it looks 
strange if I add the cross direct call.

media: qcom: camss: Decouple VFE from CSID
https://lore.kernel.org/lkml/20240522154659.510-9-quic_grosikop@quicinc.com/

I use the v4l2_subdev_notify to do the cross communication in v1 and v2 
series, but Bryan said, "The subdev notify is I think not the right fit 
for this purpose within our driver.".
Then I add an internal notify interface in camss structure, but Bryan 
suggested to use direct call, so I add these functions directly in camss.c

https://lore.kernel.org/all/236cfe43-8321-4168-8630-fb9528f581bd@linaro.org/

Thanks,
Depeng