Re: [linux-sunxi] Re: [PATCH RESEND v2 06/12] drm/sun4i: rgb: Add 1% tolerance to dclk frequency check when bridge is connected
flat view
From: Vasily Khoruzhick <anarsoul@gmail.com>
Date: 2019-02-05 17:49:17
Also in:
dri-devel, linux-devicetree
On Tue, Feb 5, 2019 at 7:42 AM Maxime Ripard [off-list ref] wrote:
On Mon, Feb 04, 2019 at 10:50:17AM -0800, Vasily Khoruzhick wrote:quoted
On Mon, Feb 4, 2019 at 8:29 AM Icenowy Zheng [off-list ref] wrote:quoted
quoted
quoted
IIRC, from the previous discussion, HDMI had a tolerancy requirement in the standard. Do you know if there's such a thing for eDP? That would solve the issue for all the eDP displays at once.I don't have access to eDP standard - vesa.org says it's available to members only.Try out to grab an old version? I remember 1.0 is open.I can't find anything regarding dot clock tolerance in DisplayPort specification.I guess since the DP is a VESA spec, it's probably .5%, just like on the EDID (well, CVT).
Unfortunately that's not enough for Pinebook. It needs 1% for 768p panel.
Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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