Re: [PATCH 0/3] arm64: dts: qcom: monaco: Enable SDHCI storage support

[Dmitry Baryshkov]

On Fri, Feb 27, 2026 at 04:20:52PM +0530, Monish Chunara wrote:
> This series enables SDHCI storage support for both SD Card and eMMC on the
> Qualcomm Monaco EVK platform.
> 
> The Monaco SoC shares the SDHCI controller between SD Card and eMMC use
> cases. Previously, the common SoC dtsi unconditionally enabled the
> 'supports-cqe' property. This causes regression for SD cards, resulting
> in timeouts and initialization failures during the probe sequence, as
> the driver attempts to enable Command Queueing (CQE) logic incompatible
> with the SD protocol.
> 
> To resolve this and enable full storage support, this series:
> 
> 1. Moves the 'supports-cqe' property out of the common SoC dtsi. It is
>    now only enabled in the specific eMMC configuration where it is
>    supported.
> 2. Adds a device tree overlay to enable SD Card support (SDR/DDR modes).
> 3. Adds a device tree overlay to enable eMMC support. This configuration
>    also explicitly disables the UFS controller to prevent power leakage,
>    as the VCC regulator is shared between the UFS and eMMC rails on this
>    platform.
> 
> Validated on Qualcomm Monaco EVK with both SD Card and eMMC modules.
> 
> Monish Chunara (3):
>   arm64: dts: qcom: monaco: Move eMMC CQE support from SoC to board DT
>   arm64: dts: qcom: monaco-evk: Enable SDHCI for SD Card via overlay
>   arm64: dts: qcom: monaco-evk: Add SDHCI support for eMMC via overlay

You are adding two overlays. But what does it mean? Does EVK has no uSD
/ eMMC at all, having both attachable via some kind of mezzanine? Is one
of them attachable? Or are both cases present onboard with the correct
one being selected by the DIP switch?

> 
>  arch/arm64/boot/dts/qcom/Makefile             |  7 ++
>  arch/arm64/boot/dts/qcom/monaco-evk-emmc.dtso | 46 ++++++++++++
>  .../boot/dts/qcom/monaco-evk-sd-card.dtso     | 72 +++++++++++++++++++
>  arch/arm64/boot/dts/qcom/monaco.dtsi          |  1 -
>  arch/arm64/boot/dts/qcom/qcs8300-ride.dts     |  1 +
>  5 files changed, 126 insertions(+), 1 deletion(-)
>  create mode 100644 arch/arm64/boot/dts/qcom/monaco-evk-emmc.dtso
>  create mode 100644 arch/arm64/boot/dts/qcom/monaco-evk-sd-card.dtso
> 
> -- 
> 2.34.1
> 

-- 
With best wishes
Dmitry