On Thu, Jan 31, 2019 at 02:25:50PM +0100, Paul Kocialkowski wrote: > When initializing clocks, a reference to the TCON channel 0 clock is > obtained. However, the clock is never prepared and enabled later. > Switching from simplefb to DRM actually disables the clock (that was > usually configured by U-Boot) because of that. > > On the V3s, this results in a hang when writing to some mixer registers > when switching over to DRM from simplefb. > > Fix this by preparing and enabling the clock when initializing other > clocks. Waiting for sun4i_tcon_channel_enable to enable the clock is > apparently too late and results in the same mixer register access hang. > > Signed-off-by: Paul Kocialkowski <paul.kocialkowski@xxxxxxxxxxx> Applied, thanks! Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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