Re: [RFC resend] arm64: mt8173: Fix Acer Chromebooks mmsys probe problem

2017-10-23 Thread Laurent Pinchart
Hi Philipp, On Thursday, 19 October 2017 17:54:16 EEST Philipp Zabel wrote: > On Thu, 2017-10-19 at 16:39 +0300, Laurent Pinchart wrote: > > On Thursday, 19 October 2017 16:01:54 EEST Philipp Zabel wrote: > >> On Thu, 2017-10-19 at 13:26 +0200, Matthias Brugger wrote: > >>> In theory the MMSYS dev

Re: [RFC resend] arm64: mt8173: Fix Acer Chromebooks mmsys probe problem

2017-10-22 Thread CK Hu
Hi, On Thu, 2017-10-19 at 16:54 +0200, Philipp Zabel wrote: > Hi Laurent, > > On Thu, 2017-10-19 at 16:39 +0300, Laurent Pinchart wrote: > > Hi Philipp, > > > > On Thursday, 19 October 2017 16:01:54 EEST Philipp Zabel wrote: > > > On Thu, 2017-10-19 at 13:26 +0200, Matthias Brugger wrote: > > >

Re: [RFC resend] arm64: mt8173: Fix Acer Chromebooks mmsys probe problem

2017-10-19 Thread Philipp Zabel
Hi Laurent, On Thu, 2017-10-19 at 16:39 +0300, Laurent Pinchart wrote: > Hi Philipp, > > On Thursday, 19 October 2017 16:01:54 EEST Philipp Zabel wrote: > > On Thu, 2017-10-19 at 13:26 +0200, Matthias Brugger wrote: > > > In theory the MMSYS device tree identifier is matches twice, by the clk > >

Re: [RFC resend] arm64: mt8173: Fix Acer Chromebooks mmsys probe problem

2017-10-19 Thread Laurent Pinchart
Hi Philipp, On Thursday, 19 October 2017 16:01:54 EEST Philipp Zabel wrote: > On Thu, 2017-10-19 at 13:26 +0200, Matthias Brugger wrote: > > In theory the MMSYS device tree identifier is matches twice, by the clk > > driver and the DRM subsystem. But the kernel only matches the first > > driver fo

Re: [RFC resend] arm64: mt8173: Fix Acer Chromebooks mmsys probe problem

2017-10-19 Thread Philipp Zabel
On Thu, 2017-10-19 at 13:26 +0200, Matthias Brugger wrote: > In theory the MMSYS device tree identifier is matches twice, by the clk > driver > and the DRM subsystem. But the kernel only matches the first driver for a > device (clk) and discards the second one. This breaks graphics on mt8173 and

[RFC resend] arm64: mt8173: Fix Acer Chromebooks mmsys probe problem

2017-10-19 Thread Matthias Brugger
In theory the MMSYS device tree identifier is matches twice, by the clk driver and the DRM subsystem. But the kernel only matches the first driver for a device (clk) and discards the second one. This breaks graphics on mt8173 and most probably on mt2701 as well. MMSYS in Mediatek SoCs has some