[PROTO][PATCH 05/10] drm/bridge: adv7511: Add max-clock, min-vrefresh options

[Ulrich Hecht]

> On August 20, 2018 at 11:28 AM Laurent Pinchart <laurent.pinchart at ideasonboard.com> wrote:
> 
> 
> Hi Ulrich,
> 
> Thank you for the patch.
> 
> On Tuesday, 14 August 2018 16:49:59 EEST Ulrich Hecht wrote:
> > From: Koji Matsuoka <koji.matsuoka.xm at renesas.com>
> > 
> > This patch adds the option to specify a maximal clock and a minimal vertical
> > refresh rate.
> 
> What is this needed for ?

Somewhere in the chain there is a component that will not tolerate clocks in excess of 135 MHz; if you don't limit it, the default for a 1920x1200 display is somewhere along 148 MHz, and the HDMI signal output is invalid.

CU
Uli