[PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: Keep DP_PWR always enabled

[PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: Keep DP_PWR always enabled

[Francesco Dolcini]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

DP_PWR on the DisplayPort connector powers active DP cables and
adapters, which do not work without it. Keep it always enabled, and mark
it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
whether or not a display driver is available.

Francesco Dolcini (2):
  arm64: dts: freescale: imx95-aquila-dev: Keep DP_PWR always enabled
  arm64: dts: freescale: imx95-aquila-clover: Keep DP_PWR always enabled

 arch/arm64/boot/dts/freescale/imx95-aquila-clover.dts | 2 ++
 arch/arm64/boot/dts/freescale/imx95-aquila-dev.dts    | 2 ++
 2 files changed, 4 insertions(+)

-- 
2.47.3

[PATCH v1 1/2] arm64: dts: freescale: imx95-aquila-dev: Keep DP_PWR always enabled

[Francesco Dolcini]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

DP_PWR on the DisplayPort connector powers active DP cables and
adapters, which do not work without it. Keep it always enabled, and mark
it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
whether or not a display driver is available.

Fixes: d5c082ba23db ("arm64: dts: freescale: add Aquila iMX95 support")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 arch/arm64/boot/dts/freescale/imx95-aquila-dev.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-aquila-dev.dts b/arch/arm64/boot/dts/freescale/imx95-aquila-dev.dts
index 7698ef44095c..cfe90831447a 100644
--- a/arch/arm64/boot/dts/freescale/imx95-aquila-dev.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-aquila-dev.dts
@@ -48,6 +48,8 @@ reg_dp_3p3v: regulator-dp-3p3v {
 		/* Aquila GPIO_21_DP */
 		gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
+		regulator-always-on;
+		regulator-boot-on;
 		regulator-max-microvolt = <3300000>;
 		regulator-min-microvolt = <3300000>;
 		regulator-name = "DP_3V3";
-- 
2.47.3

Re: [PATCH v1 1/2] arm64: dts: freescale: imx95-aquila-dev: Keep DP_PWR always enabled

[Laurentiu Palcu]

On Tue, Nov 03, 2026 at 11:53:15AM +0100, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
> 
> DP_PWR on the DisplayPort connector powers active DP cables and
> adapters, which do not work without it. Keep it always enabled, and mark
> it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
> whether or not a display driver is available.
> 
> Fixes: d5c082ba23db ("arm64: dts: freescale: add Aquila iMX95 support")
> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>

Acked-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>

-- 
Thanks,
Laurentiu

[PATCH v1 2/2] arm64: dts: freescale: imx95-aquila-clover: Keep DP_PWR always enabled

[Francesco Dolcini]

From: Francesco Dolcini <francesco.dolcini@toradex.com>

DP_PWR on the DisplayPort connector powers active DP cables and
adapters, which do not work without it. Keep it always enabled, and mark
it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
whether or not a display driver is available.

Fixes: 3f519121e120 ("arm64: dts: freescale: imx95-aquila: Add Clover carrier board")
Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>
---
 arch/arm64/boot/dts/freescale/imx95-aquila-clover.dts | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/arm64/boot/dts/freescale/imx95-aquila-clover.dts b/arch/arm64/boot/dts/freescale/imx95-aquila-clover.dts
index 07bf53240958..37fa107c6fec 100644
--- a/arch/arm64/boot/dts/freescale/imx95-aquila-clover.dts
+++ b/arch/arm64/boot/dts/freescale/imx95-aquila-clover.dts
@@ -41,6 +41,8 @@ reg_dp_3p3v: regulator-dp-3p3v {
 		/* Aquila GPIO_21_DP */
 		gpios = <&gpio3 21 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
+		regulator-always-on;
+		regulator-boot-on;
 		regulator-max-microvolt = <3300000>;
 		regulator-min-microvolt = <3300000>;
 		regulator-name = "DP_3V3";
-- 
2.47.3

Re: [PATCH v1 2/2] arm64: dts: freescale: imx95-aquila-clover: Keep DP_PWR always enabled

[Laurentiu Palcu]

On Tue, Nov 03, 2026 at 11:53:16AM +0100, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
> 
> DP_PWR on the DisplayPort connector powers active DP cables and
> adapters, which do not work without it. Keep it always enabled, and mark
> it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
> whether or not a display driver is available.
> 
> Fixes: 3f519121e120 ("arm64: dts: freescale: imx95-aquila: Add Clover carrier board")
> Signed-off-by: Francesco Dolcini <francesco.dolcini@toradex.com>

Acked-by: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>

-- 
Thanks,
Laurentiu

Re: [PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: Keep DP_PWR always enabled

[Laurentiu Palcu]

Hi Francesco,

On Tue, Nov 03, 2026 at 11:53:14AM +0100, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
> 
> DP_PWR on the DisplayPort connector powers active DP cables and
> adapters, which do not work without it. Keep it always enabled, and mark
> it boot-on so that the firmware, e.g. U-Boot, enables it at boot,

I believe this "mark it boot-on so that the firmware, e.g. U-Boot,
enables it at boot" sentence is a bit misleading. AFAIK, u-boot does not
parse the kernel dtb to see which regulators need to be enabled. The
'regulator-boot-on' property in kernel dtb regulator node simply
indicates that this regulator was left ON by the bootloader (see
Documentation/devicetree/bindings/regulator/regulator.yaml). If your
goal is to have the regulator enabled by u-boot, I believe you need to
add that in u-boot dtb as well.

Consider updating the commit messages on both patches accordingly.

-- 
Thanks,
Laurentiu

Re: [PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: Keep DP_PWR always enabled

[Francesco Dolcini]

On Tue, Nov 03, 2026 at 02:25:02PM +0200, Laurentiu Palcu wrote:
> Hi Francesco,
> 
> On Tue, Nov 03, 2026 at 11:53:14AM +0100, Francesco Dolcini wrote:
> > From: Francesco Dolcini <francesco.dolcini@toradex.com>
> > 
> > DP_PWR on the DisplayPort connector powers active DP cables and
> > adapters, which do not work without it. Keep it always enabled, and mark
> > it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
> 
> I believe this "mark it boot-on so that the firmware, e.g. U-Boot,
> enables it at boot" sentence is a bit misleading. AFAIK, u-boot does not

It's not.

We use OF_UPSTREAM, this is the single DT file that both U-Boot and
Linux (and maybe other projects) use.

Francesco

Re: [PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: Keep DP_PWR always enabled

[Laurentiu Palcu]

On Tue, Nov 03, 2026 at 01:33:38PM +0100, Francesco Dolcini wrote:
> On Tue, Nov 03, 2026 at 02:25:02PM +0200, Laurentiu Palcu wrote:
> > Hi Francesco,
> > 
> > On Tue, Nov 03, 2026 at 11:53:14AM +0100, Francesco Dolcini wrote:
> > > From: Francesco Dolcini <francesco.dolcini@toradex.com>
> > > 
> > > DP_PWR on the DisplayPort connector powers active DP cables and
> > > adapters, which do not work without it. Keep it always enabled, and mark
> > > it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
> > 
> > I believe this "mark it boot-on so that the firmware, e.g. U-Boot,
> > enables it at boot" sentence is a bit misleading. AFAIK, u-boot does not
> 
> It's not.
> 
> We use OF_UPSTREAM, this is the single DT file that both U-Boot and
> Linux (and maybe other projects) use.

Thanks for clarifying.

-- 
Thanks,
Laurentiu