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

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Message-ID: <f0f55093-585f-4270-8ced-2c92a4808c9b@linaro.org>
Date:   Fri, 18 Aug 2023 14:30:49 +0200
From:   Konrad Dybcio <konrad.dybcio@...aro.org>
To:     Bryan O'Donoghue <bryan.odonoghue@...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 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