On Sun, Sep 16, 2018 at 12:34:05PM +0800, Icenowy Zheng wrote: > When adding support for A64 HDMI PHY in 4.19, we assumed that the two > PLL-VIDEOs can both feed the HDMI PHY clock. However experiments show > that the mux bit discovered in R40 blob is not applicable on A64. This > is not discovered, as normally with a single display pipeline only > PLL-VIDEO0 will be used. > > In this patchset the second PLL is dropped, and a binding specially for > R40 HDMI PHY is added (which seems to have the mux). > > PATCH 1 is dropping second PLL for A64 HDMI PHY, and PATCH 2 to 4 > are adding R40 HDMI PHY binding, as R40 behaves differently with A64 > with this. > > This patchset targets v4.19 fixes tree, because the binding is > introduced in v4.19, and if we don't fix it there a wrong binding will > be left in a stable version released. A64 display pipeline support is > not yet in v4.19, but R40 support is in it. Applied 1 and 4 as fixes for 4.19, 2 and 3 for 4.20, since they are not fixes per se, and the R40 display engine is not enabled in 4.19 anyway. Maxime -- Maxime Ripard, Bootlin Embedded Linux and Kernel engineering https://bootlin.com
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