To make sure the display subsystem starts in a predictable state, we
need to reset it. Otherwise, unpredictable issues can happen, e.g.
on the xiaomi-laurel-sprout smartphone DSI would not work on boot.

Wire up the reset to fix.

Fixes: 0865d23a0226 ("arm64: dts: qcom: sm6125: Add display hardware nodes")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Tested-by: Yedaya Katsman <yedaya.ka@gmail.com>
Signed-off-by: Val Packett <val@packett.cool>
---
 arch/arm64/boot/dts/qcom/sm6125.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm64/boot/dts/qcom/sm6125.dtsi b/arch/arm64/boot/dts/qcom/sm6125.dtsi
index 80c42dff5399..a22374e5a17f 100644
--- a/arch/arm64/boot/dts/qcom/sm6125.dtsi
+++ b/arch/arm64/boot/dts/qcom/sm6125.dtsi
@@ -1238,6 +1238,8 @@ mdss: display-subsystem@5e00000 {
 				      "ahb",
 				      "core";
 
+			resets = <&dispcc DISP_CC_MDSS_CORE_BCR>;
+
 			power-domains = <&dispcc MDSS_GDSC>;
 
 			iommus = <&apps_smmu 0x400 0x0>;
@@ -1437,6 +1439,7 @@ dispcc: clock-controller@5f00000 {
 			power-domains = <&rpmpd RPMPD_VDDCX>;
 
 			#clock-cells = <1>;
+			#reset-cells = <1>;
 			#power-domain-cells = <1>;
 		};
 
-- 
2.52.0

On Tue, Mar 03, 2026 at 12:41:25AM -0300, Val Packett wrote:
> To make sure the display subsystem starts in a predictable state, we
> need to reset it. Otherwise, unpredictable issues can happen, e.g.
> on the xiaomi-laurel-sprout smartphone DSI would not work on boot.
> 
> Wire up the reset to fix.
> 
> Fixes: 0865d23a0226 ("arm64: dts: qcom: sm6125: Add display hardware nodes")
> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
> Tested-by: Yedaya Katsman <yedaya.ka@gmail.com>
> Signed-off-by: Val Packett <val@packett.cool>
> ---
>  arch/arm64/boot/dts/qcom/sm6125.dtsi | 3 +++
>  1 file changed, 3 insertions(+)

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>

Best regards,
Krzysztof