On 28/01/2026 19:13, Frank Li wrote:
> On Wed, Jan 28, 2026 at 06:21:27PM +0200, Josua Mayer wrote:
>> imx8mp.dtsi includes a default port@1 node with an empty placeholder
>> endpoint intended for linking to a dsi bridge or panel.
>>
>> HummingBoard Pulse mini-hdmi dtsi added and linked hdmi bridge to yet
>> another endpoint.
>>
>> This duplicate endpoint can cause dsi_attach to fail.
> Can you add descript about why duplicate endpoint cause fail?
I didn't debug this in detail. Basic observation was as follows:
I was under the impression that two endpoint nodes ended up in the final
dtb,
with different phandles which made the remote-endpoint references
inconsistent.
I'd prefer not to explain in detail what happened, and focus on removing
inconsistency from the dts.
>
> Frank
>> Remove the duplicate node and link to the one defined in soc dtsi.
>> Further remove the unnecessary attach-bridge property.
>>
>> Fixes: 2a222aa2bee9 ("arm64: dts: add description for solidrun imx8mp hummingboard variants")
>> Signed-off-by: Josua Mayer <josua@solid-run.com>
>> ---
>> .../dts/freescale/imx8mp-hummingboard-pulse-mini-hdmi.dtsi | 11 ++++-------
>> 1 file changed, 4 insertions(+), 7 deletions(-)
>>
>> diff --git a/arch/arm64/boot/dts/freescale/imx8mp-hummingboard-pulse-mini-hdmi.dtsi b/arch/arm64/boot/dts/freescale/imx8mp-hummingboard-pulse-mini-hdmi.dtsi
>> index 46916ddc0533..0e5f4607c7c1 100644
>> --- a/arch/arm64/boot/dts/freescale/imx8mp-hummingboard-pulse-mini-hdmi.dtsi
>> +++ b/arch/arm64/boot/dts/freescale/imx8mp-hummingboard-pulse-mini-hdmi.dtsi
>> @@ -41,7 +41,7 @@ port@0 {
>> reg = <0>;
>>
>> adv7535_from_dsim: endpoint {
>> - remote-endpoint = <&dsim_to_adv7535>;
>> + remote-endpoint = <&mipi_dsi_out>;
>> };
>> };
>>
>> @@ -71,11 +71,8 @@ &lcdif1 {
>> &mipi_dsi {
>> samsung,esc-clock-frequency = <10000000>;
>> status = "okay";
>> +};
>>
>> - port@1 {
>> - dsim_to_adv7535: endpoint {
>> - remote-endpoint = <&adv7535_from_dsim>;
>> - attach-bridge;
>> - };
>> - };
>> +&mipi_dsi_out {
>> + remote-endpoint = <&adv7535_from_dsim>;
>> };
>>
>> --
>> 2.43.0
>>
>>