From: Eric Anholt <eric@anholt.net>
To: Rob Clark <robdclark@gmail.com>,
dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org
Cc: Rob Clark <robdclark@chromium.org>,
aarch64-laptops@lists.linaro.org, linux-pm@vger.kernel.org,
Stephen Boyd <sboyd@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
linux-kernel@vger.kernel.org, Andy Gross <agross@kernel.org>,
freedreno@lists.freedesktop.org, linux-clk@vger.kernel.org
Subject: Re: [PATCH 1/5] clk: inherit clocks enabled by bootloader
Date: Mon, 01 Jul 2019 11:25:36 -0700 [thread overview]
Message-ID: <8736jpzk67.fsf@anholt.net> (raw)
In-Reply-To: <20190630150230.7878-2-robdclark@gmail.com>
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Rob Clark <robdclark@gmail.com> writes:
> From: Rob Clark <robdclark@chromium.org>
>
> The goal here is to support inheriting a display setup by bootloader,
> although there may also be some non-display related use-cases.
>
> Rough idea is to add a flag for clks and power domains that might
> already be enabled when kernel starts, and which should not be
> disabled at late_initcall if the kernel thinks they are "unused".
>
> If bootloader is enabling display, and kernel is using efifb before
> real display driver is loaded (potentially from kernel module after
> userspace starts, in a typical distro kernel), we don't want to kill
> the clocks and power domains that are used by the display before
> userspace starts.
>
> Signed-off-by: Rob Clark <robdclark@chromium.org>
Raspberry Pi is carrying downstream hacks to do similar stuff, and it
would be great to see CCF finally support this.
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next prev parent reply other threads:[~2019-07-01 18:25 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20190630150230.7878-1-robdclark@gmail.com>
2019-06-30 15:01 ` [PATCH 1/5] clk: inherit clocks enabled by bootloader Rob Clark
2019-07-01 18:02 ` [Freedreno] " Jeffrey Hugo
2019-07-01 18:25 ` Eric Anholt [this message]
2019-07-01 19:05 ` Rob Clark
2019-06-30 15:01 ` [PATCH 2/5] genpd/gdsc: inherit display powerdomain from bootloader Rob Clark
2019-07-01 18:08 ` [Freedreno] " Jeffrey Hugo
2019-06-30 15:01 ` [PATCH 3/5] drm/msm/dsi: split clk rate setting and enable Rob Clark
2019-07-01 18:32 ` [Freedreno] " Jeffrey Hugo
2019-06-30 15:01 ` [PATCH 4/5] drm/msm/dsi: get the clocks into OFF state at init Rob Clark
2019-07-01 18:37 ` Jeffrey Hugo
2019-07-01 18:58 ` Rob Clark
2019-07-01 19:07 ` Jeffrey Hugo
2019-07-01 19:34 ` Rob Clark
2019-07-02 13:53 ` Rob Clark
2019-06-30 15:01 ` [PATCH 5/5] drm/bridge: ti-sn65dsi86: support booloader enabled display Rob Clark
2019-07-01 18:39 ` Jeffrey Hugo
2019-07-02 15:20 ` Laurent Pinchart
2019-07-02 15:38 ` Rob Clark
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