From: Doug Anderson <dianders@chromium.org>
To: Rajeev Nandan <rajeevny@codeaurora.org>,
Lyude Paul <lyude@redhat.com>,
Robert Foss <robert.foss@linaro.org>
Cc: Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
Sam Ravnborg <sam@ravnborg.org>,
Thierry Reding <thierry.reding@gmail.com>,
dri-devel <dri-devel@lists.freedesktop.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] drm/panel-simple: Power the panel when probing DP AUX backlight
Date: Thu, 15 Jul 2021 08:05:31 -0700 [thread overview]
Message-ID: <CAD=FV=ULfkbw08xH7D1K2HvpiYzQCGFT8oqVAOnpTcdmRTGC3g@mail.gmail.com> (raw)
In-Reply-To: <20210714093334.1.Idb41f87e5abae4aee0705db7458b0097fc50e7ab@changeid>
Hi,
On Wed, Jul 14, 2021 at 9:34 AM Douglas Anderson <dianders@chromium.org> wrote:
>
> When I tried booting up a device that needed the DP AUX backlight, I
> found an error in the logs:
> panel-simple-dp-aux: probe of aux-ti_sn65dsi86.aux.0 failed with error -110
>
> The aux transfers were failing because the panel wasn't powered. Just
> like when reading the EDID we need to power the panel when trying to
> talk to it. Add the needed pm_runtime calls.
>
> After I do this I can successfully probe the panel and adjust the
> backlight on my board.
>
> Fixes: bfd451403d70 ("drm/panel-simple: Support DP AUX backlight")
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---
>
> drivers/gpu/drm/panel/panel-simple.c | 3 +++
> 1 file changed, 3 insertions(+)
Pushed with Lyude's review to drm-misc-next:
5ead9b5b1575 drm/panel-simple: Power the panel when probing DP AUX backlight
prev parent reply other threads:[~2021-07-15 15:05 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-07-14 16:33 [PATCH] drm/panel-simple: Power the panel when probing DP AUX backlight Douglas Anderson
2021-07-14 18:48 ` Lyude Paul
2021-07-15 15:05 ` Doug Anderson [this message]
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