linux-kernel - Re: [PATCH 1/9] media: qcom: camss: Add per sub-device type resources

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Date: Tue, 12 Mar 2024 15:44:44 +0100
From: Konrad Dybcio <konrad.dybcio@...aro.org>
To: Gjorgji Rosikopulos <quic_grosikop@...cinc.com>, rfoss@...nel.org,
 todor.too@...il.com, bryan.odonoghue@...aro.org, andersson@...nel.org,
 mchehab@...nel.org
Cc: linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
 linux-kernel@...r.kernel.org, laurent.pinchart@...asonboard.com,
 hverkuil-cisco@...all.nl, quic_hariramp@...cinc.com
Subject: Re: [PATCH 1/9] media: qcom: camss: Add per sub-device type resources



On 2/27/24 13:24, Gjorgji Rosikopulos wrote:
> From: Radoslav Tsvetkov <quic_rtsvetko@...cinc.com>
> 
> Currently resources structure grows with additional parameters required for
> each sub-deivce. However each sub-device has some specific resources or
> configurations which need to be passed during the initialization.
> 
> This change adds per sub-device type structure to simplify the things
> and removes the magical void pointer to hw_ops.

I'm not quite sure what the benefit here is, as opposed to simply
extending <name>_device?

Generally, I think the driver state as of today is somewhat backwards..

We define a common set of resources, and then assign them subdev-specific
ops, instead of defining the subdev and consuming clocks/pds/resets
within a subdevice there..

Konrad