Re: [PATCH] arm64: dts: imx93-9x9-qsb: Add tianma,tm050rdh03 panel

[Frank Li <Frank.li@nxp.com>]

On Wed, Apr 08, 2026 at 04:40:37PM +0800, Liu Ying wrote:
> On Wed, Apr 08, 2026 at 04:28:40AM -0400, Frank Li wrote:
...
> >>>>>
> >>>>> Is it possible to appply this overlay file and kd50g21-40nt-a1 overlay file
> >>>>>
> >>>>> to imx93-9x9-qsb.dtb, so needn't create dtsi.
> >>>>
> >>>> I'm sorry, I don't get your question here.
> >>>> Anyway, the DT overlays are needed, because the 40-pin EXP/PRI interface on
> >>>> the i.MX93 9x9 QSB board can not only connect to a DPI panel adapter board
> >>>> but also to an audio hat[2], and maybe more.  The newly introduced .dtsi
> >>>> file just aims to avoid duplicated code.
> >>>
> >>> My means apply two overlay files to dtb
> >>>
> >>> imx93-9x9-qsb-tianma-tm050rdh03-dtbs += imx93-9x9-qsb.dtb imx93-9x9-qsb-ontat-kd50g21-40nt-a1.dtbo imx93-9x9-qsb-tianma-tm050rdh03.dtbo
>
> This ...
>
> >>>
> >>> In imx93-9x9-qsb-tianma-tm050rdh03.dtbo, only include
> >>> &{/} {
> >>> 	panel {
> >>> 		compatible = "tianma,tm050rdh03";
> >>> 		enable-gpios = <&pcal6524 8 GPIO_ACTIVE_HIGH>;
> >>> 	};
> >>> };
> >>
> >> If an user wants to use imx93-9x9-qsb.dtb and the DT overlay blob
> >> imx93-9x9-qsb-tianma-tm050rdh03.dtbo to enable the tianma,tm050rdh03
> >> DPI panel, then it won't work unless the user also apply
> >> imx93-9x9-qsb-ontat-kd50g21-40nt-a1.dtbo, right?
> >>
> >>>
> >
> > Yes, imx93-9x9-qsb-tianma-tm050rdh03.dtb already created, which already
> > applied both overlay file.
>
> .... indicates that imx93-9x9-qsb-tianma-tm050rdh03.dtb is generated by
> applying both imx93-9x9-qsb-ontat-kd50g21-40nt-a1.dtbo and
> imx93-9x9-qsb-tianma-tm050rdh03.dtbo to imx93-9x9-qsb.dtb.
> While, imx93-9x9-qsb-tianma-tm050rdh03.dtbo(a DT overlay blob) just contains
> the panel node, which means that an user __cannot_ enable the tianma,tm050rdh03
> DPI panel by only applying it to imx93-9x9-qsb.dtb, unless the user also
> applies imx93-9x9-qsb-ontat-kd50g21-40nt-a1.dtbo.  That's why the .dtsi
> file is needed.

what's problem if we require user do that? Makefile already create finial
imx93-9x9-qsb-tianma-tm050rdh03.dtb.

Any user really apply dtso manaully without use kernel's Makefile?

>
> >
> > can the same board be use for imx91 or other evk boards?
>
> Yes, both tianma,tm050rdh03 and ontat,kd50g21-40nt-a1 DPI panels can be
> connected to i.MX91/93 11x11 EVK and 9x9 QSB boards.

Is it possible to use one overlay files for all imx91/imx93 boards?

Frank
>
> >
> > Frank
> >
> >>> Frank
> >>>>
> >>>> [2] https://www.nxp.com/design/design-center/development-boards-and-designs/mx93aud-hat-audio-board:MX93AUD-HAT
> >>>>
> >>>>>
> >>>>> Frank
> >>>>>>
> >>>>>> ---
> >>>>>> base-commit: 816f193dd0d95246f208590924dd962b192def78
> >>>>>> change-id: 20260407-tianma-tm050rdh03-imx93-9x9-qsb-6e4bbbde3d08
> >>>>>>
> >>>>>> Best regards,
> >>>>>> --
> >>>>>> Liu Ying <victor.liu@nxp.com>
> >>>>>>
> >>>>
> >>>> --
> >>>> Regards,
> >>>> Liu Ying
> >>
> >> --
> >> Regards,
> >> Liu Ying
>
> --
> Regards,
> Liu Ying