Re: Support for Lenovo IdeaCentre Mini X (Purwa)

[Mostafa Saleh <smostafa@google.com>]

On Fri, May 15, 2026 at 01:28:00PM +0200, Konrad Dybcio wrote:
> On 4/30/26 7:22 PM, Mostafa Saleh wrote:
> > Hi Konrad,
> > 
> > On Thu, Apr 30, 2026 at 06:48:33PM +0200, Konrad Dybcio wrote:
> >> On 4/29/26 4:18 PM, Mostafa Saleh wrote:
> >>> Hi,
> >>>
> >>> I see that recently the support for “Lenovo IdeaCentre Mini X” was
> >>> added [1]
> >>> However, unfortunately that doesn’t work for my device, the board
> >>> resets once I try to boot the kernel from UEFI.
> >>>
> >>> I believe that’s because it is another variant, as I have been using
> >>> my device tree for some time[2] which is hacked based on the crd
> >>> device tree with some trial and error. With that I can boot with
> >>> PCI/NVME/Ethernet and USB (there are also some other errors in the
> >>> log related PMIC), this device tree is based on purwa.dtsi unlike
> >>> the upstream one which use hamoa.dtsi.
> >>>
> >>> Are there any plans to support the Purwa based variant? I am happy to
> >>> help with testing, but I can’t confidently send patches as my device
> >>> tree is based on trial and error rather than a data sheet.
> 
> [...]
> 
> > I can try to see the differences and build another dt on top of the
> > hamoa one, but that will also be based on trial and error rather than
> > actual knowledge, I am happy to test patches if you have other
> > suggestions.
> 
> Hm, I ran a quick diff and even though there's a lot of noise (mostly
> due to the same things being named slightly differently), the actual
> meat and potatoes aren't very different at all, e.g. the PHY regulators
> are the same
> 
> Could you post the full dmesg with both DTs?

This is the log with the device tree that boots[1]:
https://gist.github.com/misaleh/b09c04480062c5a3e7bafe3d4176b15d

This is the log with replacing hamoa.dtsi with purwa.dtsi inside
hamoa-lenovo-ideacentre-mini-01q8x10.dtsi which does not boot:
https://gist.github.com/misaleh/aaad5704824edac9a43e2ebe45adbf85

With those modifications, I can boot:

diff --git a/arch/arm64/boot/dts/qcom/hamoa-lenovo-ideacentre-mini-01q8x10.dts b/arch/arm64/boot/dts/qcom/hamoa-lenovo-ideacentre-mini-01q8x10.dts
index bfb7cea56df9..00f9a1d5ac95 100644
--- a/arch/arm64/boot/dts/qcom/hamoa-lenovo-ideacentre-mini-01q8x10.dts
+++ b/arch/arm64/boot/dts/qcom/hamoa-lenovo-ideacentre-mini-01q8x10.dts
@@ -8,7 +8,7 @@
 #include <dt-bindings/gpio/gpio.h>
 #include <dt-bindings/regulator/qcom,rpmh-regulator.h>
 
-#include "hamoa.dtsi"
+#include "purwa.dtsi"
 #include "hamoa-pmics.dtsi"
 
 / {
@@ -17,7 +17,7 @@ / {
 	chassis-type = "desktop";
 
 	aliases {
-		serial0 = &uart14;
+		serial0 = &uart21;
 	};
 
 	wcd938x: audio-codec {
@@ -185,6 +185,7 @@ vreg_nvme2_3p3: regulator-nvme2-3p3 {
 		pinctrl-names = "default";
 
 		regulator-boot-on;
+		status = "disabled";
 	};
 
 	vreg_v0p9: regulator-v0p9 {
@@ -714,19 +715,20 @@ &pcie3 {
 
 	vddpe-3v3-supply = <&vreg_nvme2_3p3>;
 
-	status = "okay";
+	status = "disabled";
 };
 
 &pcie3_phy {
 	vdda-phy-supply = <&vreg_l3c>;
 	vdda-pll-supply = <&vreg_l3e>;
 
-	status = "okay";
+	status = "disabled";
 };
 
 &pcie3_port0 {
 	reset-gpios = <&tlmm 143 GPIO_ACTIVE_LOW>;
 	wake-gpios = <&tlmm 145 GPIO_ACTIVE_LOW>;
+	status = "disabled";
 };
 
 &pcie4 {
@@ -1064,21 +1066,9 @@ wcn_sw_en: wcn-sw-en-state {
 	};
 };
 
-&uart14 {
+&uart21 {
+	compatible = "qcom,geni-debug-uart";
 	status = "okay";
-
-	bluetooth {
-		compatible = "qcom,wcn7850-bt";
-		max-speed = <3200000>;
-
-		vddaon-supply = <&vreg_pmu_aon_0p59>;
-		vddwlcx-supply = <&vreg_pmu_wlcx_0p8>;
-		vddwlmx-supply = <&vreg_pmu_wlmx_0p85>;
-		vddrfacmn-supply = <&vreg_pmu_rfa_cmn>;
-		vddrfa0p8-supply = <&vreg_pmu_rfa_0p8>;
-		vddrfa1p2-supply = <&vreg_pmu_rfa_1p2>;
-		vddrfa1p8-supply = <&vreg_pmu_rfa_1p8>;
-	};
 };
 
 &usb_1_ss0 {

The issues were:
- pcie6a and pcie3 conflict in regulator pins
- Different UART

However, there are quite verbose errors from MDSS clocks, and spmi
failures. Here are the booting logs with the above change (at
loglevel=5)

https://gist.github.com/misaleh/3b1d67ac51a8960b811cc20075ab7630

I get cleaner boot logs with MDSS and pmc8380_6 disabled.


[1] https://github.com/misaleh/linux/blob/lenovo/arch/arm64/boot/dts/qcom/x1p42100-lenovo-ideacentre-x-gen10.dts

Thanks,
Mostafa
> 
> Konrad