From: Stephen Boyd <swboyd@chromium.org>
To: Douglas Anderson <dianders@chromium.org>,
Sam Ravnborg <sam@ravnborg.org>,
Thierry Reding <thierry.reding@gmail.com>
Cc: Rob Clark <robdclark@chromium.org>,
Douglas Anderson <dianders@chromium.org>,
Daniel Vetter <daniel@ffwll.ch>, David Airlie <airlied@linux.ie>,
Linus Walleij <linus.walleij@linaro.org>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/5] drm/panel-simple: Undo enable if HPD never asserts
Date: Fri, 15 Jan 2021 14:49:44 -0800 [thread overview]
Message-ID: <161075098468.3661239.7555919770669361287@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <20210115144345.v2.1.I33fcbd64ab409cfe4f9491bf449f51925a4d3281@changeid>
Quoting Douglas Anderson (2021-01-15 14:44:16)
> If the HPD signal never asserts in panel_simple_prepare() and we
> return an error, we should unset the enable GPIO and disable the
> regulator to make it consistent for the caller.
>
> At the moment I have some hardware where HPD sometimes doesn't assert.
> Obviously that needs to be debugged, but this patch makes it so that
> if I add a retry that I can make things work.
>
> Fixes: 48834e6084f1 ("drm/panel-simple: Support hpd-gpios for delaying prepare()")
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> ---
Nice catch on the unprepared_time
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
next prev parent reply other threads:[~2021-01-15 22:50 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-15 22:44 [PATCH v2 0/5] drm/panel-simple: Patches for N116BCA-EA1 Douglas Anderson
2021-01-15 22:44 ` [PATCH v2 1/5] drm/panel-simple: Undo enable if HPD never asserts Douglas Anderson
2021-01-15 22:49 ` Stephen Boyd [this message]
2021-01-15 22:44 ` [PATCH v2 2/5] drm/panel-simple: Don't wait longer for HPD than hpd_absent_delay Douglas Anderson
2021-01-25 20:26 ` Stephen Boyd
2021-01-15 22:44 ` [PATCH v2 3/5] drm/panel-simple: Retry if we timeout waiting for HPD Douglas Anderson
2021-01-25 20:28 ` Stephen Boyd
2021-01-27 21:11 ` Doug Anderson
2021-01-15 22:44 ` [PATCH v2 4/5] dt-bindings: dt-bindings: display: simple: Add N116BCA-EA1 Douglas Anderson
2021-01-15 22:59 ` Doug Anderson
2021-01-25 20:29 ` Stephen Boyd
2021-02-08 21:50 ` Rob Herring
2021-01-15 22:44 ` [PATCH v2 5/5] drm/panel-simple: " Douglas Anderson
2021-01-25 20:29 ` Stephen Boyd
2021-03-05 15:42 ` [PATCH v2 0/5] drm/panel-simple: Patches for N116BCA-EA1 Doug Anderson
2021-03-10 23:25 ` Linus Walleij
2021-03-10 23:47 ` Doug Anderson
2021-03-11 0:57 ` Linus Walleij
2021-03-11 1:01 ` Doug Anderson
2021-03-11 16:20 ` Linus Walleij
2021-03-11 16:15 ` Linus Walleij
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