Re: [PATCH 1/1] ARM: dts: don't make DP a consumer of DISP1 on Exynos5250

[Andreas Färber]

Am 14.03.2015 um 09:11 schrieb Javier Martinez Canillas:
> By making the DP controller a consumer of DISP1, the PD is powered
> off when the exynos-dp probe is deferred and powered on again when
> the exynos-drm driver is probed.
> 
> But this causes the exynos-dp driver failing to obtain the stream
> clock since the FIMD has been powered off with the DISP1 PD:
> 
> exynos-dp 145b0000.dp-controller: Timeout of video streamclk ok
> exynos-dp 145b0000.dp-controller: unable to config video
> 
> The Exynos5250 documentation doesn't mention that the Display Port
> Transmitter module is included in the DISP1 PD so the device should
> not have a reference to this Power Domain.
> 
> This patch fixes video display on an Exynos5250 Snow Chromebook.
> 
> Fixes: 2d2c9a8d0a4f ("ARM: dts: add display power domain for exynos5250")
> Signed-off-by: Javier Martinez Canillas <javier.martinez@xxxxxxxxxxxxxxx>
> ---
> 
> Hello Andrzej and Marek,
> 
> I need this patch to have display working on an Snow Chromebook

Tested-by: Andreas Färber <afaerber@xxxxxxx>

This fixes the display on the Spring Chromebook as well!

Thanks,
Andreas

-- 
SUSE Linux GmbH, Maxfeldstr. 5, 90409 Nürnberg, Germany
GF: Felix Imendörffer, Jane Smithard, Jennifer Guild, Dilip Upmanyu,
Graham Norton; HRB 21284 (AG Nürnberg)
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/