arm64: dts: qcom: sc8280xp: Use MMCX for all DP controllers

While MDSS_GDSC is a subdomain of MMCX, Linux does not respect this
relationship and sometimes invokes sync_state on the rpmhpd (MMCX)
before the DisplayPort controller has had a chance to probe.

The result when this happens is that the power is lost to the multimedia
subsystem between the probe of msm_drv and the DisplayPort controller -
which results in an irrecoverable state.

While this is an implementation problem, this aligns the power domain
setting of the one DP instance with that of all the others.

Fixes: 57d6ef683a15 ("arm64: dts: qcom: sc8280xp: Define some of the display blocks")
Signed-off-by: Bjorn Andersson <quic_bjorande@quicinc.com>
Reviewed-by: Johan Hovold <johan+linaro@kernel.org>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Signed-off-by: Bjorn Andersson <andersson@kernel.org>
Link: https://lore.kernel.org/r/20230112135055.3836555-1-quic_bjorande@quicinc.com

diff --git a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
index 0fdfc1c9299d09def38a31f1307e476995de10e1..e50b75504142caef331c2aebcffd3f1db6974b46 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc8280xp.dtsi
@@ -2564,7 +2564,7 @@
                                interrupts = <15>;
                                phys = <&mdss0_dp3_phy>;
                                phy-names = "dp";
-                               power-domains = <&dispcc0 MDSS_GDSC>;
+                               power-domains = <&rpmhpd SC8280XP_MMCX>;
 
                                assigned-clocks = <&dispcc0 DISP_CC_MDSS_DPTX3_LINK_CLK_SRC>,
                                                  <&dispcc0 DISP_CC_MDSS_DPTX3_PIXEL0_CLK_SRC>;