[PATCH v9 22/23] drm/mediatek: Power on devices in OVL adaptor when atomic enable

[AngeloGioacchino Del Regno]

Il 18/10/23 06:36, Hsiao Chien Sung ha scritto:
> Different from OVL, OVL adaptor is a pseudo device so we didn't
> define it in the device tree, consequently, pm_runtime_resume_and_get()
> called by .atomic_enable() powers on no device in OVL adaptor and
> leads to power outage in the corresponding IOMMU.
> 
> To resolve the issue, we implement a function to power on the RDMAs
> in OVL adaptor, and the system will make sure the IOMMU is powered on
> as well because of the device link (iommus) in the RDMA nodes in DTS.
> 
> Signed-off-by: Hsiao Chien Sung <shawn.sung at mediatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>