[PATCH] drm/tegra: hub: Do not enable orphaned window group

[Thierry Reding]

On Tue, May 19, 2020 at 02:03:01AM -0700, Nicolin Chen wrote:
> Though the unconditional enable/disable code is not a final solution,
> we don't want to run into a NULL pointer situation when window group
> doesn't link to its DC parent if the DC is disabled in Device Tree.
> 
> So this patch simply adds a check to make sure that window group has
> a valid parent before running into tegra_windowgroup_enable/disable.
> 
> Signed-off-by: Nicolin Chen <nicoleotsuka at gmail.com>
> ---
>  drivers/gpu/drm/tegra/hub.c | 8 ++++++--
>  1 file changed, 6 insertions(+), 2 deletions(-)

Applied, thanks.

Thierry
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