Re: [PATCH] ARM: dts: exynos: Increase minimal ACLK400_DISP1 frequency on Exynos542x

2019-04-24 Thread Krzysztof Kozlowski
On Tue, Mar 19, 2019 at 02:26:01PM +0100, Marek Szyprowski wrote: > ACLK400_DISP1 bus feeds some internal buses of the display subsystem, some > of which are also related to TV/Mixer hardware modules. When that bus > is set to 120MHz, Exynos Mixer is not able to properly handle two XRGB > display p

[PATCH] ARM: dts: exynos: Increase minimal ACLK400_DISP1 frequency on Exynos542x

2019-03-19 Thread Marek Szyprowski
ACLK400_DISP1 bus feeds some internal buses of the display subsystem, some of which are also related to TV/Mixer hardware modules. When that bus is set to 120MHz, Exynos Mixer is not able to properly handle two XRGB display planes at FullHD-60MHz. DMA underrun happens, which in turn might result in