linux-imx

MLK-23187-2 drm/imx: dpu: crtc: Disable DPRC repeat_en in ->atomic_disable()

In order to avoid garbage data left in RTRAM after disabling CRTC,
the SoC designer suggests us to disable DPRC repeat_en after FrameGen
FGEN is cleared and before ENSTS is cleared.  Also, it is suggested
that FGEN clearing should be done in the frame prior to DPRC repeat_en
disablement. So, syncing to FrameGen frame counter moving is needed.
The disablement procedure should be done as soon as possible, so we
disable local irq and preemption during the procedure to ensure this.

Reviewed-by: Sandor Yu <Sandor.yu@nxp.com>
Signed-off-by: Liu Ying <victor.liu@nxp.com>