linux-kernel - Re: [PATCH v16 08/40] gpu: host1x: Add initial runtime PM and OPP support

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Message-ID: <6adda63b4de6b55d11426ecbb08d6c51@kernel.org>
Date:   Mon, 31 Jan 2022 20:39:33 +0000
From:   Marc Zyngier <maz@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>
Cc:     Jon Hunter <jonathanh@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Viresh Kumar <vireshk@...nel.org>,
        Stephen Boyd <sboyd@...nel.org>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Mikko Perttunen <mperttunen@...dia.com>,
        Lee Jones <lee.jones@...aro.org>,
        Uwe Kleine-König 
        <u.kleine-koenig@...gutronix.de>, Nishanth Menon <nm@...com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Michael Turquette <mturquette@...libre.com>,
        linux-kernel@...r.kernel.org, linux-tegra@...r.kernel.org,
        linux-pm@...r.kernel.org, linux-pwm@...r.kernel.org,
        linux-mmc@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-clk@...r.kernel.org, David Heidelberg <david@...t.cz>
Subject: Re: [PATCH v16 08/40] gpu: host1x: Add initial runtime PM and OPP
 support

Hi all,

On 2021-12-22 19:31, Dmitry Osipenko wrote:
> 22.12.2021 22:30, Jon Hunter пишет:
>> 
>> On 22/12/2021 19:01, Dmitry Osipenko wrote:
>> 
>> ...
>> 
>>> diff --git a/drivers/gpu/host1x/syncpt.c 
>>> b/drivers/gpu/host1x/syncpt.c
>>> index e08e331e46ae..8194826c9ce3 100644
>>> --- a/drivers/gpu/host1x/syncpt.c
>>> +++ b/drivers/gpu/host1x/syncpt.c
>>> @@ -137,6 +137,15 @@ void host1x_syncpt_restore(struct host1x *host)
>>>       struct host1x_syncpt *sp_base = host->syncpt;
>>>       unsigned int i;
>>> 
>>> +    for (i = 0; i < host->info->nb_pts; i++) {
>>> +        /*
>>> +         * Unassign syncpt from channels for purposes of Tegra186
>>> +         * syncpoint protection. This prevents any channel from
>>> +         * accessing it until it is reassigned.
>>> +         */
>>> +        host1x_hw_syncpt_assign_to_channel(host, sp_base + i, NULL);
>>> +    }
>>> +
>>>       for (i = 0; i < host1x_syncpt_nb_pts(host); i++)
>>>           host1x_hw_syncpt_restore(host, sp_base + i);
>>> 
>>> @@ -352,13 +361,6 @@ int host1x_syncpt_init(struct host1x *host)
>>>       for (i = 0; i < host->info->nb_pts; i++) {
>>>           syncpt[i].id = i;
>>>           syncpt[i].host = host;
>>> -
>>> -        /*
>>> -         * Unassign syncpt from channels for purposes of Tegra186
>>> -         * syncpoint protection. This prevents any channel from
>>> -         * accessing it until it is reassigned.
>>> -         */
>>> -        host1x_hw_syncpt_assign_to_channel(host, &syncpt[i], NULL);
>>>       }
>>> 
>>>       for (i = 0; i < host->info->nb_bases; i++)
>>> 
>> 
>> 
>> Thanks! This fixed it!
> 
> I'll prepare proper patch with yours t-b, thank you.

The fix has been in -next for some time now, but it still hasn't
made it into Linus' tree (at least not in -rc2).

Any hope for this to land -rc3?

Thanks,

      M.
-- 
Jazz is not dead. It just smells funny...