[v2] arm64: dts: imx9x: Fix PCIe memory window overlap with System RAM

[PATCH v2 0/3] arm64: dts: imx9x: Fix PCIe memory window overlap with System RAM

Posted by hongxing.zhu@oss.nxp.com 1 month, 1 week ago

This patch series fix PCIe non-prefetchable memory window overlap with
system DRAM on i.MX9 series SoCs (imx95, imx94, and imx943).

The current address 0xe0000000 conflicts with DRAM regions. Sashiko
reports the potential issue in previous review:

The fix relocates the PCI bus address to 0x10000000, a reserved and safe
range. The other PCI bus address and window size remain unchanged.

Changes in v2:
Clarified that the adddress being corrected is the PCI bus address in
the commits.

Richard Zhu (3):
  arm64: dts: imx95: Avoid 32-bit PCIe window System RAM overlap
  arm64: dts: imx94: Avoid 32-bit pcie window system ram overlap
  arm64: dts: imx943: Avoid 32-bit PCIe window System RAM overlap

[PATCH v2 1/3] arm64: dts: imx95: Avoid 32-bit PCIe window System RAM
[PATCH v2 2/3] arm64: dts: imx94: Avoid 32-bit PCIe window System RAM
[PATCH v2 3/3] arm64: dts: imx943: Avoid 32-bit PCIe window System

arch/arm64/boot/dts/freescale/imx94.dtsi  | 2 +-
arch/arm64/boot/dts/freescale/imx943.dtsi | 2 +-
arch/arm64/boot/dts/freescale/imx95.dtsi  | 4 ++--
3 files changed, 4 insertions(+), 4 deletions(-)

Re: [PATCH v2 0/3] arm64: dts: imx9x: Fix PCIe memory window overlap with System RAM

Posted by Frank.Li@oss.nxp.com 3 weeks, 4 days ago

From: Frank Li <Frank.Li@nxp.com>


On Fri, 21 Aug 2026 13:43:31 +0800, hongxing.zhu@oss.nxp.com wrote:
> This patch series fix PCIe non-prefetchable memory window overlap with
> system DRAM on i.MX9 series SoCs (imx95, imx94, and imx943).
>
> The current address 0xe0000000 conflicts with DRAM regions. Sashiko
> reports the potential issue in previous review:
>
> The fix relocates the PCI bus address to 0x10000000, a reserved and safe
> range. The other PCI bus address and window size remain unchanged.
>
> [...]

Applied, thanks!

[1/3] arm64: dts: imx95: Avoid 32-bit PCIe window System RAM overlap
      commit: 9094eb07b3e236233dbaac61ed30cc65be9e9c6c
[2/3] arm64: dts: imx94: Avoid 32-bit PCIe window System RAM overlap
      commit: 775ebd246092294432895f8e9bd48e3f0a56714a
[3/3] arm64: dts: imx943: Avoid 32-bit PCIe window System RAM overlap
      commit: fff67007ad5403966092006867fe9926aaedda0d

Commit message add discuss link and "Avoid hit this as a P2P transfer[1]."

Best regards,
--
Frank Li <Frank.Li@nxp.com>