Date: Wed, 7 Jul 2021 15:18:19 +0200 From: Emmanuel Vadot <manu@bidouilliste.com> To: "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> Cc: freebsd-arm@FreeBSD.org Subject: Re: rk3399 "power off" gpu? Message-ID: <20210707151819.74377cb776da1acde9d9b5d6@bidouilliste.com> In-Reply-To: <alpine.BSF.2.00.2107071303140.68830@ai.fobar.qr> References: <alpine.BSF.2.00.2107071303140.68830@ai.fobar.qr>
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On Wed, 7 Jul 2021 13:06:14 +0000 (UTC) "Bjoern A. Zeeb" <bzeeb-lists@lists.zabbadoz.net> wrote: > Hi, > > I was wondering if there is a way to completely "shutdown" (power off) > the GPU or put it into "low power" (suspend) mode? > > Just setting the gpu state to disabled is probably the wrong as it won't > give the SYR828 PMIC anymore and u-boot likely enables it all. > > If it's possible would anyone have a dtso to do that? > > /bz > > -- > Bjoern A. Zeeb r15:7 > The mali part in RK3399 is powered via an external regulator. If the regulator is unused it's automatically shutdown in FreeBSD unless you set hw.regulator.disable_unused=0. That being said on rockpro64 the always-on property is set for this regulator so you will need some overlay that removes this property. -- Emmanuel Vadot <manu@bidouilliste.com> <manu@FreeBSD.org>
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