linux-kernel - Re: [PATCH v2 10/13] media: qcom: camss: Allow clocks vfeN vfe_liteN or vfe

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Date:   Sat, 19 Aug 2023 15:49:00 +0100
From:   Bryan O'Donoghue <bryan.odonoghue@...aro.org>
To:     Konrad Dybcio <konrad.dybcio@...aro.org>, rfoss@...nel.org,
        todor.too@...il.com, agross@...nel.org, andersson@...nel.org,
        mchehab@...nel.org, hverkuil-cisco@...all.nl,
        laurent.pinchart@...asonboard.com, sakari.ailus@...ux.intel.com,
        andrey.konovalov@...aro.org
Cc:     linux-media@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 10/13] media: qcom: camss: Allow clocks vfeN vfe_liteN
 or vfe_lite

On 18/08/2023 13:30, Konrad Dybcio wrote:
> On 17.08.2023 16:38, Bryan O'Donoghue wrote:
>> The number of Video Front End - VFE or Image Front End - IFE supported
>> with new SoCs can vary both for the full and lite cases.
>>
>> For example sdm845 has one vfe_lite and two vfe interfaces with the vfe
>> clock called simply "vfe_lite" with no integer postfix. sc8280xp has four
>> vfe and four vfe lite blocks.
>>
>> We need to support the following clock name formats
>>
>> - vfeN
>> - vfe_liteN
>> - vfe_lite
>>
>> with N being any reasonably sized integer.
>>
>> There are two sites in this code which need to do the same thing,
>> constructing and matching strings with the pattern above, so encapsulate
>> the logic in one function.
>>
>> Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@...aro.org>
>> ---
>>   drivers/media/platform/qcom/camss/camss-vfe.c | 22 ++++++++++++++-----
>>   1 file changed, 16 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
>> index 8f48401e31cd3..73380e75dbb22 100644
>> --- a/drivers/media/platform/qcom/camss/camss-vfe.c
>> +++ b/drivers/media/platform/qcom/camss/camss-vfe.c
>> @@ -437,6 +437,20 @@ void vfe_isr_reset_ack(struct vfe_device *vfe)
>>   	complete(&vfe->reset_complete);
>>   }
>>   
>> +static int vfe_match_clock_names(struct vfe_device *vfe,
>> +				 struct camss_clock *clock)
>> +{
>> +	char vfe_name[CAMSS_RES_MAX];
> VFE_MAX?
> 
> the current value of 17 would be very excessive for VFEs!
> 
> Konrad

Solving these generic and large struct resource strings is something I 
plan for another series.

Good enough ?

---
bod