Messages in this thread | | | From | Kevin Hilman <> | Subject | Re: [RFT PATCH] drm/exynos: Enable DP clock to fix display on Exynos5250 and other | Date | Wed, 29 Apr 2015 10:31:41 -0700 |
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Krzysztof Kozlowski <k.kozlowski@samsung.com> writes:
> After adding display power domain for Exynos5250 in commit > 2d2c9a8d0a4f ("ARM: dts: add display power domain for exynos5250") the > display on Chromebook Snow and others stopped working after boot. > > The reason for this suggested Andrzej Hajda: the DP clock was disabled. > This clock is required by Display Port and is enabled by bootloader. > However when FIMD driver probing was deferred, the display power domain > was turned off. This effectively reset the value of DP clock enable > register. > > When exynos-dp is later probed, the clock is not enabled and display is > not properly configured: > > exynos-dp 145b0000.dp-controller: Timeout of video streamclk ok > exynos-dp 145b0000.dp-controller: unable to config video > > Signed-off-by: Krzysztof Kozlowski <k.kozlowski@samsung.com> > Reported-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk> > Fixes: 2d2c9a8d0a4f ("ARM: dts: add display power domain for exynos5250") > Cc: <stable@vger.kernel.org> > > --- > > This should fix issue reported by Javier [1][2]. > > Tested on Chromebook Snow (Exynos 5250). More testing would be great, > especially on other Exynos 5xxx products.
I hoped to try this on my exynos5 boards, but it doesn't seem to apply to linux-next or to Linus' master branch.
Are there some other dependencies here?
Kevin
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