On Tue, Feb 09, 2021 at 06:58:55PM +0100, Jernej Skrabec wrote: > Over the year I got plenty of reports of troubles with H6 HDMI signal. > Sometimes monitor flickers, sometimes there was no image at all and > sometimes it didn't play well with AVR. > > It turns out there are multiple issues. Patch 1 fixes clock issue, > which didn't adjust parent rate, even if it is allowed to do so. Patch 2 > adds polarity config in tcon1. This is seemingly not needed for pre-HDMI2 > controllers, although BSP drivers set it accordingly every time. It > turns out that HDMI2 controllers often don't work with monitors if > polarity is not set correctly. Patch 3 always set clock rate for HDMI > controller. Patch 4 fixes H6 HDMI PHY settings. Patch 5 fixes comment and > clock rate limit (wrong reasoning). > > Please take a look. > > Best regards, > Jernej > > Changes from v2: > - use clk_hw_can_set_rate_parent() directly instead of checking flags > Changes from v1: > - collected Chen-Yu tags (except on replaced patch 4) > - Added some comments in patch 2 > - Replaced patch 4 (see commit log for explanation) Applied patches 2-5, thanks Maxime
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