[PATCH] drm: mxsfb: Disable overlay plane support for i.MX8MM/i.MX8MN

[Lucas Stach]

Am Montag, dem 21.06.2021 um 00:48 +0200 schrieb Marek Vasut:
> The iMX8MM and iMX8MN do not support the overlay plane, so they
> are MXSFB V4. Add the compatible strings to reflect this. Note
> that iMX8MQ does support the overlay plane, so it is MXSFB V6.

Do we need this compatible in the driver? If there are no other changes
known at this time, shouldn't we be able to just specify "fsl,imx28-
lcdif" as the fallback compatible in the DT, besides the imx8m*
specific ones?

Regards,
Lucas

> 
> Signed-off-by: Marek Vasut <marex at denx.de>
> Cc: Daniel Abrecht <public at danielabrecht.ch>
> Cc: Emil Velikov <emil.l.velikov at gmail.com>
> Cc: Laurent Pinchart <laurent.pinchart at ideasonboard.com>
> Cc: Lucas Stach <l.stach at pengutronix.de>
> Cc: Stefan Agner <stefan at agner.ch>
> ---
>  drivers/gpu/drm/mxsfb/mxsfb_drv.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> index c277d3f61a5e..0ae4a3553304 100644
> --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c
> @@ -308,6 +308,8 @@ static const struct of_device_id mxsfb_dt_ids[] = {
>  	{ .compatible = "fsl,imx23-lcdif", .data = &mxsfb_devdata[MXSFB_V3], },
>  	{ .compatible = "fsl,imx28-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
>  	{ .compatible = "fsl,imx6sx-lcdif", .data = &mxsfb_devdata[MXSFB_V6], },
> +	{ .compatible = "fsl,imx8mm-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
> +	{ .compatible = "fsl,imx8mn-lcdif", .data = &mxsfb_devdata[MXSFB_V4], },
>  	{ /* sentinel */ }
>  };
>  MODULE_DEVICE_TABLE(of, mxsfb_dt_ids);