ARM: dts: qcom: msm8974: add MDSS reset

[PATCH v2] ARM: dts: qcom: msm8974: add MDSS reset

Posted by Dmitry Baryshkov 1 month, 2 weeks ago

Commit 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until
late_initcall_sync") kept power-domains on longer during boot which is
causing DSI clock to get stuck and fail to acquire its configuration on
DSI bringup. Follow the example of other platforms and add MDSS reset to
the display subsystem node, fixing DSI issues.

Fixes: 5a9fc531f6ec ("ARM: dts: msm8974: add display support")
Suggested-by: Stephan Gerhold <stephan.gerhold@linaro.org>
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
---
Changes in v2:
- Replaced GENPD_FLAG_NO_STAY_ON on MDSS domain with MDSS_RESET being
  specified to the MDSS node (Stephan).
- Link to v1: https://patch.msgid.link/20260809-msm8974-mmcc-fix-v1-1-50f2dcf18d2e@oss.qualcomm.com
---
 arch/arm/boot/dts/qcom/qcom-msm8974.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi b/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi
index 06c0af0aa317..f300de74c47d 100644
--- a/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi
+++ b/arch/arm/boot/dts/qcom/qcom-msm8974.dtsi
@@ -10,6 +10,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/power/qcom-rpmpd.h>
 #include <dt-bindings/reset/qcom,gcc-msm8974.h>
+#include <dt-bindings/reset/qcom,mmcc-msm8974.h>
 
 / {
 	#address-cells = <1>;
@@ -1935,6 +1936,8 @@ mdss: display-subsystem@fd900000 {
 			interrupt-controller;
 			#interrupt-cells = <1>;
 
+			resets = <&mmcc MDSS_RESET>;
+
 			status = "disabled";
 
 			#address-cells = <1>;

---
base-commit: 6b8c8af514d739d0335f5579b585e02babe8a727
change-id: 20260809-msm8974-mmcc-fix-c83b5fa916af

Best regards,
--  
With best wishes
Dmitry

Re: [PATCH v2] ARM: dts: qcom: msm8974: add MDSS reset

Posted by Bjorn Andersson 5 hours ago

On Mon, 10 Aug 2026 12:01:52 +0300, Dmitry Baryshkov wrote:
> Commit 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until
> late_initcall_sync") kept power-domains on longer during boot which is
> causing DSI clock to get stuck and fail to acquire its configuration on
> DSI bringup. Follow the example of other platforms and add MDSS reset to
> the display subsystem node, fixing DSI issues.
> 
> 
> [...]

Applied, thanks!

[1/1] ARM: dts: qcom: msm8974: add MDSS reset
      commit: 542991a1d77e5fea5263c2406773a0cd09a8ec48

Best regards,
-- 
Bjorn Andersson <andersson@kernel.org>

Re: [PATCH v2] ARM: dts: qcom: msm8974: add MDSS reset

Posted by Konrad Dybcio 1 month, 1 week ago

On 8/10/26 11:01 AM, Dmitry Baryshkov wrote:
> Commit 13a4b7fb6260 ("pmdomain: core: Leave powered-on genpds on until
> late_initcall_sync") kept power-domains on longer during boot which is
> causing DSI clock to get stuck and fail to acquire its configuration on
> DSI bringup. Follow the example of other platforms and add MDSS reset to
> the display subsystem node, fixing DSI issues.
> 
> Fixes: 5a9fc531f6ec ("ARM: dts: msm8974: add display support")
> Suggested-by: Stephan Gerhold <stephan.gerhold@linaro.org>
> Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
> ---

Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>

Konrad