Re: [PATCH v2 1/2] drm: lcdif: Set undocumented bit to clear FIFO at vsync

Liu Ying
2026-04-07T06:30:14Z

On Thu, Apr 02, 2026 at 08:33:50PM +0200, Paul Kocialkowski wrote:
> There is an undocumented bit used in the NXP BSP to clear the FIFO
> systematically at vsync. In normal operation, the FIFO should already
> be empty but it doesn't hurt to add it as an extra safety measure.
>
> Signed-off-by: Paul Kocialkowski <paulk@sys-base.io>
> Reviewed-by: Lucas Stach <l.stach@pengutronix.de>
> ---
> drivers/gpu/drm/mxsfb/lcdif_kms.c | 3 ++-
> drivers/gpu/drm/mxsfb/lcdif_regs.h | 1 +
> 2 files changed, 3 insertions(+), 1 deletion(-)

Reviewed-by: Liu Ying <victor.liu@nxp.com>
Thanks!

--
Regards,
Liu Ying