Re: [PATCH v3 10/15] media: qcom: camss: Allow clocks vfeN vfe_liteN or vfe_lite

Konrad Dybcio
2023-08-26T10:09:45Z

On 23.08.2023 12:44, 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@linaro.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];
> + char vfe_lite_name[CAMSS_RES_MAX];
I don't think using the "number of resources" define to define
the maximum length of a resource name is a good idea.

Perhaps we can do:

char vfe_name[5]; /* "vfeX\0" */
char vfe_lite_name[10]; /* "vfe_liteX\0" */

if index > 9
return INCREASE_THE_BUFFER

Konrad