linux-kernel - Re: Lay common foundation to make PVR/SGX work without hacks on OMAP34xx, OMAP36xx, AM335x and potentially OMAP4, OMAP5

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Message-ID: <20190817070307.GJ52127@atomide.com>
Date:   Sat, 17 Aug 2019 00:03:07 -0700
From:   Tony Lindgren <tony@...mide.com>
To:     Adam Ford <aford173@...il.com>
Cc:     "H. Nikolaus Schaller" <hns@...delico.com>,
        Merlijn Wajer <merlijn@...zup.org>,
        Paweł Chmiel <pawel.mikolaj.chmiel@...il.com>,
        Philipp Rossak <embed3d@...il.com>,
        moaz korena <moaz@...ena.xyz>,
        Ivaylo Dimitrov <ivo.g.dimitrov.75@...il.com>,
        Filip Matijević <filip.matijevic.pz@...il.com>,
        Tomi Valkeinen <tomi.valkeinen@...com>,
        linux-omap <linux-omap@...r.kernel.org>,
        kernel@...a-handheld.com,
        Discussions about the Letux Kernel 
        <letux-kernel@...nphoenux.org>, maemo-leste@...ts.dyne.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: Lay common foundation to make PVR/SGX work without hacks on
 OMAP34xx, OMAP36xx, AM335x and potentially OMAP4, OMAP5

* Adam Ford <aford173@...il.com> [190816 23:02]:
> On Wed, Aug 14, 2019 at 8:16 AM Tony Lindgren <tony@...mide.com> wrote:
> > Well I just posted some sgx interconnect target module patches. We might
> > still have them in v5.4 assuming people manage to review and test them.
> 
> Nikolaus,
> 
> I tested Tony's change and I can confirm that I can read the value
> when enabled.  Should I apply his patches to your branch before I
> test, or is it go too to go as-is? I've got an AM3517, OMAP35 and a
> DM3730.  I am not sure if the AM3517 is even on the radar, but it has
> an sgx530 as well.

My estimate is am3517 is wired the same way as omap34xx with a 60%
chance, then 30% chance it's wired the same way as omap36xx, and then
10% chance for similar wiring to am335x.. So hopefully that leaves 0%
chance for yet something different for it's wiring :)

If you have a chance please give it a try. Also check the TRM for the
sgx sysconfig register bits to see which of the above matches, and if
3517 has a related rstctrl register like am335x has.

Regards,

Tony