Re: [PATCH v4 3/5] drm: panel: simple: Allow specifying the delay from prepare to enable

From: Sam Ravnborg
Date: Sun Nov 29 2020 - 17:12:56 EST


Hi Douglas,

On Mon, Nov 09, 2020 at 05:00:57PM -0800, Douglas Anderson wrote:
> On the panel I'm looking at, there's an 80 ms minimum time between HPD
> being asserted by the panel and setting the backlight enable GPIO.
> While we could just add an 80 ms "enable" delay, this is not ideal.
> Link training is allowed to happen in parallel with this delay so the
> fixed 80 ms delay over-delays.
>
> We'll support this by logging the time at the end of prepare and then
> delaying in enable if enough time hasn't passed.
>
> Signed-off-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
Applied too.

Sam