linux-kernel - Re: [PATCH V2 00/13] soc: imx: gpcv2: support i.MX8MM

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Message-ID: <d19d35e8a90ece7124d06855b9f2b226b73c8f6e.camel@pengutronix.de>
Date:   Mon, 09 Aug 2021 10:15:48 +0200
From:   Lucas Stach <l.stach@...gutronix.de>
To:     Ezequiel Garcia <ezequiel@...guardiasur.com.ar>,
        "Peng Fan (OSS)" <peng.fan@....nxp.com>
Cc:     Rob Herring <robh+dt@...nel.org>, Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>, krzk@...nel.org,
        agx@...xcpu.org, Marek Vasut <marex@...x.de>,
        andrew.smirnov@...il.com, devicetree <devicetree@...r.kernel.org>,
        linux-arm-kernel <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        ping.bai@....com, frieder.schrempf@...tron.de, aford173@...il.com,
        abel.vesa@....com, Peng Fan <peng.fan@....com>,
        linux-media <linux-media@...r.kernel.org>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Andrzej Pietrasiewicz <andrzej.p@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>
Subject: Re: [PATCH V2 00/13] soc: imx: gpcv2: support i.MX8MM

Hi Ezequiel,

Am Mittwoch, dem 04.08.2021 um 11:30 -0300 schrieb Ezequiel Garcia:
> Hi Peng, Lucas,
> 
> On Wed, 5 May 2021 at 21:32, Peng Fan (OSS) <peng.fan@....nxp.com> wrote:
> > 
> > From: Peng Fan <peng.fan@....com>
> > 
> > 
> > V2:
> >  - Add R-b/A-b tag
> >  - Merge V1 patch 13 to V2 patch 6
> >  - Drop V1 patch 15
> >  - Merge V1 patch 16 to V2 patch 5 and add comments in patch 5 to explain
> >  details
> >  - Add explaination in patch 8 for "why the resets are not defined"
> > 
> > This patchset is a pick up Lucas's gpcv2 work for i.MX8MM and several
> > minor changes from me to make it could work with i.MX BLK-CTL driver.
> > 
> > Thanks for Lucas's work and suggestion, Frieder Schrempf for collecting
> > all the patches, Jacky Bai on help debug issues.
> > 
> > Lucas Stach (12):
> >   soc: imx: gpcv2: move to more ideomatic error handling in probe
> >   soc: imx: gpcv2: move domain mapping to domain driver probe
> >   soc: imx: gpcv2: switch to clk_bulk_* API
> >   soc: imx: gpcv2: split power up and power down sequence control
> >   soc: imx: gpcv2: wait for ADB400 handshake
> >   soc: imx: gpcv2: add runtime PM support for power-domains
> >   soc: imx: gpcv2: allow domains without power-sequence control
> >   dt-bindings: imx: gpcv2: add support for optional resets
> >   soc: imx: gpcv2: add support for optional resets
> >   dt-bindings: power: add defines for i.MX8MM power domains
> >   soc: imx: gpcv2: add support for i.MX8MM power domains
> >   soc: imx: gpcv2: Add support for missing i.MX8MM VPU/DISPMIX power
> >     domains
> > 
> 
> It's nice to see this finally moving forward!
> 
> As you know, Hantro G2 support for i.MX8MQ (and i.MX8MP, i.MX8MM) is currently
> blocked, as you have requested:
> 
> https://lore.kernel.org/driverdev-devel/5aa5700b862234895a7a6eb251ca3c80fdc1a6d3.camel@collabora.com/
> 
> So, I think we really need to include i.MX8MP and i.MX8MQ on this series.
> It's been quite a while and we really need to have that. To be honest,
> I fear that
> if we merge this series as-is, MX8MP and MX8MP support will fall in
> the oblivion,
> and Hantro G2 VPU will remain unusable.
> 
> We are planning to submit Hantro G2 VP9 support soon, and we've been testing
> on various platforms, but it will also be blocked by lack of power-domains.
> 
> In the future, please Cc the linux-media mailing list, as well as
> Benjamin, Andrzej and myself, so we can follow this.

Please take a look at [1], which is the current state of this work. I
intend to add both i.MX8MQ and i.MX8MP support to the series now, as it
seems that there have been no big objections to my approach over the
last 2 weeks, where I was on vacation. ;)

Regards,
Lucas

[1]
https://lore.kernel.org/linux-arm-kernel/20210716232916.3572966-14-l.stach@pengutronix.de/T/#m43cbf6b8615b2a37ff2abb0346e7e7f6594976d1