linux-kernel - Re: [PATCH v2 1/3] soc: mediatek: pm-domains: Use correct mask for bus_prot

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Message-ID: <c0cace72-e114-6b00-0254-c103e52a7b1f@gmail.com>
Date:   Wed, 31 Mar 2021 13:01:41 +0200
From:   Matthias Brugger <matthias.bgg@...il.com>
To:     Bilal Wasim <bilalwasim676@...il.com>,
        linux-mediatek@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        enric.balletbo@...labora.com, hsinyi@...omium.org,
        weiyi.lu@...iatek.com, Fabien Parent <fparent@...libre.com>
Subject: Re: [PATCH v2 1/3] soc: mediatek: pm-domains: Use correct mask for
 bus_prot_clr



On 01/02/2021 13:14, Bilal Wasim wrote:
> When "bus_prot_reg_update" is true, the driver should use
> INFRA_TOPAXI_PROTECTEN for both setting and clearing the bus
> protection. However, the driver does not use this mask for
> clearing bus protection which causes failure when booting
> the imgtec gpu.
> 
> Corrected and tested with mt8173 chromebook.
> 
> Signed-off-by: Bilal Wasim <Bilal.Wasim@...tec.com>
> Reviewed-by: Hsin-Yi Wang <hsinyi@...omium.org>

BUS_PROT_UPDATE_TOPAXI is also used in mt8167. I'd need feedback if this would
break that SoC before accepting this patch.

Regards,
Matthias

> ---
>  drivers/soc/mediatek/mtk-pm-domains.h | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-pm-domains.h b/drivers/soc/mediatek/mtk-pm-domains.h
> index 141dc76054e6..7454c0b4f768 100644
> --- a/drivers/soc/mediatek/mtk-pm-domains.h
> +++ b/drivers/soc/mediatek/mtk-pm-domains.h
> @@ -60,7 +60,7 @@
>  #define BUS_PROT_UPDATE_TOPAXI(_mask)				\
>  		BUS_PROT_UPDATE(_mask,				\
>  				INFRA_TOPAXI_PROTECTEN,		\
> -				INFRA_TOPAXI_PROTECTEN_CLR,	\
> +				INFRA_TOPAXI_PROTECTEN,		\
>  				INFRA_TOPAXI_PROTECTSTA1)
>  
>  struct scpsys_bus_prot_data {
>