Re: [PATCH v2] arm64: dts: qcom: x1e80100: Switch PCIe 6a to 4 lanes mode

[Konrad Dybcio]

On 4.10.2024 11:06 AM, Abel Vesa wrote:
> The PCIe 6a controller and PHY can be configured in 4-lanes mode or
> 2-lanes mode. For 4-lanes mode, it fetches the lanes provided by PCIe 6b.
> For 2-lanes mode, PCIe 6a uses 2 lanes and then PCIe 6b uses the other 2
> lanes. Configure it in 4-lane mode and then each board can configure it
> depending on the design. Both the QCP and CRD boards, currently upstream,
> use PCIe 6a for NVMe in 4-lane mode. Mark the controller as 4-lane as
> well. This is the last change needed in order to support NVMe with Gen4
> 4-lanes on all existing X Elite boards.
> 
> Signed-off-by: Abel Vesa <abel.vesa@xxxxxxxxxx>
> ---
> Changes in v2:
> - Re-worded the commit message according to Johan's suggestions
> - Dropped the clocks changes.
> - Dropped the fixes tag as this relies on the Gen4 4-lanes stability
>   patchset which has been only merged in 6.12, so backporting this patch
>   would break NVMe support for all platforms.
> - Link to v1: https://lore.kernel.org/r/20240531-x1e80100-dts-fixes-pcie6a-v1-2-1573ebcae1e8@xxxxxxxxxx
> ---
Depends on

https://lore.kernel.org/linux-arm-msm/20240916082307.29393-3-johan+linaro@xxxxxxxxxx/

Otherwise

Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxxxxxxxx>

Konrad