Hi Joonyoung,
2015-06-12 Joonyoung Shim <jy0922.shim at samsung.com>:
> When the fimd is disabled by fimd_disable(), enabled overlay layers also
> are disabled. If clocks for fimd are enabled by fimd_enable() on this
> case, it can lead IOMMU page fault. The reason is that VIDCON0_ENVID and
> VIDCON0_ENVID_F bits of VIDCON0 register are set still even though fimd
> is disabled, so it may continue display output of prior when clocks for
> fimd are enabled again.
>
> Signed-off-by: Joonyoung Shim <jy0922.shim at samsung.com>
> ---
> drivers/gpu/drm/exynos/exynos_drm_fimd.c | 2 ++
> 1 file changed, 2 insertions(+)
Reviewed-by: Gustavo Padovan <gustavo.padovan at collabora.co.uk>
Gustavo
