linux-kernel - Re: [PATCH v2] soc: qcom: llcc: Fix slice configuration values for SC8280XP

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Date:   Thu, 2 Feb 2023 09:58:53 +0100
From:   Johan Hovold <johan@...nel.org>
To:     Abel Vesa <abel.vesa@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Sai Prakash Ranjan <quic_saipraka@...cinc.com>,
        linux-arm-msm@...r.kernel.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2] soc: qcom: llcc: Fix slice configuration values for
 SC8280XP

On Fri, Jan 27, 2023 at 04:47:24PM +0200, Abel Vesa wrote:
> These new values are now based on the latest LLCC SC table.

Please expand expand the commit message with details on why this is
needed (e.g. for benefit of people less familiar with this driver that
need to determine whether this should be backported, etc).

You are also only fixing the three slice ids so please mention that
specifically.

> Fixes: ec69dfbdc426 ("soc: qcom: llcc: Add sc8180x and sc8280xp configurations")

After having looked at the code, it seems you're missing a CC stable
tag here.

> Signed-off-by: Abel Vesa <abel.vesa@...aro.org>
> ---
> 
> The v1 is here:
> https://lore.kernel.org/all/20230126171636.2319496-1-abel.vesa@linaro.org/
> 
> Changes since v1:
>  * dropped the LLCC_GPU and LLCC_WRCACHE max_cap changes
>  * took the new values from documentatio this time rather than
>    downstream kernel
> 
>  drivers/soc/qcom/llcc-qcom.c | 6 +++---
>  1 file changed, 3 insertions(+), 3 deletions(-)
> 
> diff --git a/drivers/soc/qcom/llcc-qcom.c b/drivers/soc/qcom/llcc-qcom.c
> index 23ce2f78c4ed..26efe12012a0 100644
> --- a/drivers/soc/qcom/llcc-qcom.c
> +++ b/drivers/soc/qcom/llcc-qcom.c
> @@ -191,9 +191,9 @@ static const struct llcc_slice_config sc8280xp_data[] = {
>  	{ LLCC_CVP,      28, 512,  3, 1, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
>  	{ LLCC_APTCM,    30, 1024, 3, 1, 0x0,   0x1, 1, 0, 0, 1, 0, 0 },
>  	{ LLCC_WRCACHE,  31, 1024, 1, 1, 0xfff, 0x0, 0, 0, 0, 0, 1, 0 },
> -	{ LLCC_CVPFW,    32, 512,  1, 0, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> -	{ LLCC_CPUSS1,   33, 2048, 1, 1, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> -	{ LLCC_CPUHWT,   36, 512,  1, 1, 0xfff, 0x0, 0, 0, 0, 0, 1, 0 },
> +	{ LLCC_CVPFW,    17, 512,  1, 0, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> +	{ LLCC_CPUSS1,   3, 2048, 1, 1, 0xfff, 0x0, 0, 0, 0, 1, 0, 0 },
> +	{ LLCC_CPUHWT,   5, 512,  1, 1, 0xfff, 0x0, 0, 0, 0, 0, 1, 0 },
>  };
>  
>  static const struct llcc_slice_config sdm845_data[] =  {

Johan