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From: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Date: Tue, 23 Jan 2024 19:48:12 +0100
Message-ID: <CABGWkvp=5a58Byd7Kc0rqNbq8HexuR2QTzXWVEMASM=QYVD_NQ@mail.gmail.com>
Subject: Re: [PATCH v8 5/5] ARM: dts: add stm32f769-disco-mb1225-revb03-mb1166-reva09
To: Alexandre TORGUE <alexandre.torgue@foss.st.com>
Cc: linux-kernel@vger.kernel.org, linux-amarula@amarulasolutions.com, 
	Lee Jones <lee@kernel.org>, Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>, 
	Linus Walleij <linus.walleij@linaro.org>, Andre Przywara <andre.przywara@arm.com>, 
	Baruch Siach <baruch@tkos.co.il>, Conor Dooley <conor+dt@kernel.org>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>, 
	=?UTF-8?Q?Leonard_G=C3=B6hrs?= <l.goehrs@pengutronix.de>, 
	Maxime Coquelin <mcoquelin.stm32@gmail.com>, Peter Rosin <peda@axentia.se>, 
	Rob Herring <robh+dt@kernel.org>, Sean Nyekjaer <sean@geanix.com>, devicetree@vger.kernel.org, 
	linux-arm-kernel@lists.infradead.org, 
	linux-stm32@st-md-mailman.stormreply.com
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Hi Alexandre,

On Tue, Jan 23, 2024 at 5:36=E2=80=AFPM Alexandre TORGUE
<alexandre.torgue@foss.st.com> wrote:
>
> Hi Dario
>
> On 1/12/24 15:48, Dario Binacchi wrote:
> > As reported in the section 8.3 (i. e. Board revision history) of docume=
nt
> > UM2033 (i. e. Discovery kit with STM32F769NI MCU) these are the changes
> > related to the board revisions addressed by the patch:
> > - Board MB1225 revision B-03:
> >    - Memory MICRON MT48LC4M32B2B5-6A replaced by ISSI IS42S32400F-6BL
> > - Board MB1166 revision A-09:
> >    - LCD FRIDA FRD397B25009-D-CTK replaced by FRIDA FRD400B25025-A-CTK
> >
> > The patch only adds the DTS support for the new display which belongs t=
o
> > to the Novatek NT35510-based panel family.
> >
> > Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
> > Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
> > Reviewed-by: Raphael Gallais-Pou <raphael.gallais-pou@foss.st.com>
> >
>
> I still have YAML error. Do you have same on your side or maybe I missed
> a dt-binding patch somewhere ?
>
> /arch/arm/boot/dts/st/stm32f769-disco-mb1225-revb03-mb1166-reva09.dtb:
> dsi@40016c00: Unevaluated properties are not allowed ('interrupts',
> 'panel-dsi@0' were unexpected)
>         from schema $id: http://devicetree.org/schemas/display/st,stm32-d=
si.yaml#
> /arch/arm/boot/dts/st/stm32f769-disco-mb1225-revb03-mb1166-reva09.dtb:
> panel-dsi@0: 'port' does not match any of the regexes: 'pinctrl-[0-9]+'
>         from schema $id:
> http://devicetree.org/schemas/display/panel/novatek,nt35510.yaml#

What command do you run?

As reported by commit:
commit b81c8c3b8e3847a14bd83dd1de460df3efcb3329
Author: Benjamin Gaignard <benjamin.gaignard@st.com>
Date:   Fri Oct 11 15:06:58 2019 +0200

    ARM: dts: stm32: remove useless interrupt from dsi node for stm32f469

    DSI driver doesn't use interrupt, remove it from the node since it
    breaks yaml check.

    Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
    Signed-off-by: Alexandre Torgue <alexandre.torgue@st.com

The fix could be to remove the 'interrupts' property from the dsi@40016c00
added by the patch [2/5] "ARM: dts: stm32: add DSI support on stm32f769"

>
> Aside that, I just have a cosmetic question. Can we find a shorter name
> for the board ? (not sure we can).

In the repo https://github.com/STMicroelectronics/STM32CubeF7.git
you can find this code:

#if defined(USE_STM32F769I_DISCO_REVB03)
/***********************NT35510
Initialization********************************/

  /* Initialize the NT35510 LCD Display IC Driver (TechShine LCD IC Driver)
   * depending on configuration set in 'hdsivideo_handle'.
   */
  NT35510_Init(NT35510_FORMAT_RGB888, orientation);
/***********************End NT35510 Initialization*************************=
***/
#else

/***********************OTM8009A Initialization****************************=
****/

  /* Initialize the OTM8009A LCD Display IC Driver (KoD LCD IC Driver)
  *  depending on configuration set in 'hdsivideo_handle'.
  */
  OTM8009A_Init(OTM8009A_FORMAT_RGB888, orientation);

/***********************End OTM8009A Initialization************************=
****/
#endif /* USE_STM32F769I_DISCO_REVB03 */

in file Drivers/BSP/STM32F769I-Discovery/stm32f769i_discovery_lcd.c.

And the comment:

/* USE_STM32F769I_DISCO_REVB03 */ /* Applicable only for STM32F769I
DISCOVERY w/ MB1166-A09 LCD daughter board connected on */
in file Drivers/BSP/STM32F769I-Discovery/stm32f769i_discovery.h.

One possible approach might be to drop 'mb1225,' assuming that
'revb03' refers to it implicitly:
stm32f769-disco-revb03-mb1166-reva09

But any suggestion is welcome.

I will wait for your opinion before sending version 9.

Thanks and regards,
Dario
>
> Cheers
> Alex
>
>
>
> > ---
> >
> > Changes in v8:
> > - Add Reviewed-by tag of Linus Walleij
> > - Add Reviewed-by tag of Raphael Gallais-Pou
> >
> > Changes in v7:
> > - Replace .dts with .dtb in the Makefile
> >
> > Changes in v6:
> > - Drop patches
> >    - [5/8] dt-bindings: nt35510: add compatible for FRIDA FRD400B25025-=
A-CTK
> >    - [7/8] drm/panel: nt35510: move hardwired parameters to configurati=
on
> >    - [8/8] drm/panel: nt35510: support FRIDA FRD400B25025-A-CTK
> >    because applied by the maintainer Linus Walleij
> >
> > Changes in v5:
> > - Replace GPIOD_ASIS with GPIOD_OUT_HIGH in the call to devm_gpiod_get_=
optional().
> >
> > Changes in v2:
> > - Change the status of panel_backlight node to "disabled"
> > - Delete backlight property from panel0 node.
> > - Re-write the patch [8/8] "drm/panel: nt35510: support FRIDA FRD400B25=
025-A-CTK"
> >    in the same style as the original driver.
> >
> >   arch/arm/boot/dts/st/Makefile                  |  1 +
> >   ...2f769-disco-mb1225-revb03-mb1166-reva09.dts | 18 +++++++++++++++++=
+
> >   2 files changed, 19 insertions(+)
> >   create mode 100644 arch/arm/boot/dts/st/stm32f769-disco-mb1225-revb03=
-mb1166-reva09.dts
> >
> > diff --git a/arch/arm/boot/dts/st/Makefile b/arch/arm/boot/dts/st/Makef=
ile
> > index 7892ad69b441..aa5b50d7ac61 100644
> > --- a/arch/arm/boot/dts/st/Makefile
> > +++ b/arch/arm/boot/dts/st/Makefile
> > @@ -23,6 +23,7 @@ dtb-$(CONFIG_ARCH_STM32) +=3D \
> >       stm32f469-disco.dtb \
> >       stm32f746-disco.dtb \
> >       stm32f769-disco.dtb \
> > +     stm32f769-disco-mb1225-revb03-mb1166-reva09.dtb \
> >       stm32429i-eval.dtb \
> >       stm32746g-eval.dtb \
> >       stm32h743i-eval.dtb \
> > diff --git a/arch/arm/boot/dts/st/stm32f769-disco-mb1225-revb03-mb1166-=
reva09.dts b/arch/arm/boot/dts/st/stm32f769-disco-mb1225-revb03-mb1166-reva=
09.dts
> > new file mode 100644
> > index 000000000000..014cac192375
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/st/stm32f769-disco-mb1225-revb03-mb1166-reva09.=
dts
> > @@ -0,0 +1,18 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +/*
> > + * Copyright (c) 2023 Dario Binacchi <dario.binacchi@amarulasolutions.=
com>
> > + */
> > +
> > +#include "stm32f769-disco.dts"
> > +
> > +&panel_backlight {
> > +     status =3D "disabled";
> > +};
> > +
> > +&panel0 {
> > +     compatible =3D "frida,frd400b25025", "novatek,nt35510";
> > +     vddi-supply =3D <&vcc_3v3>;
> > +     vdd-supply =3D <&vcc_3v3>;
> > +     /delete-property/backlight;
> > +     /delete-property/power-supply;
> > +};


--=20

Dario Binacchi

Senior Embedded Linux Developer

dario.binacchi@amarulasolutions.com

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