Re: [PATCH 1/2] dt-bindings: drm/bridge: sn65dsi86: Add panel-hpd-delay

2018-10-22 Thread Doug Anderson
Hi, On Sun, Oct 21, 2018 at 2:07 AM Laurent Pinchart wrote: > > Hi Douglas, > > Thank you for the patch. > > On Friday, 19 October 2018 23:19:39 EEST Douglas Anderson wrote: > > The timing diagram of some eDP panels says that you're supposed to > > wait for HPD to be asserted before the aux chann

Re: [PATCH 1/2] dt-bindings: drm/bridge: sn65dsi86: Add panel-hpd-delay

2018-10-21 Thread Laurent Pinchart
Hi Douglas, Thank you for the patch. On Friday, 19 October 2018 23:19:39 EEST Douglas Anderson wrote: > The timing diagram of some eDP panels says that you're supposed to > wait for HPD to be asserted before the aux channel is operational. > > In some cases, however, it's better to just hardcode

[PATCH 1/2] dt-bindings: drm/bridge: sn65dsi86: Add panel-hpd-delay

2018-10-19 Thread Douglas Anderson
The timing diagram of some eDP panels says that you're supposed to wait for HPD to be asserted before the aux channel is operational. In some cases, however, it's better to just hardcode the max delay instead of trying to use HPD. Why? The sn65dsi86 datasheet says that it only reports the deboun