title: "PCIe: handle suspend problem"
team: IO
key: 61128a40-edce-11ea-90d7-7f8bdf62ff21
status: Done
assignee: Marek

bsp41x:
 - 6c3a8adfec10cb6f4efa88e5dc58cd8ea34420ac # PCI: pcie-rcar: Add the suspend/resume for pcie-rcar driver
 - 3283eefba71ffd708c53048e4187dcdbc8638fb3 # PCI: pcie-rcar: Support runtime PM, link state L1 handling

bsp51x:
 - 34c4ea50465d94bfc7ed230a0d8659063e112fea # PCI: pcie-rcar: Support runtime PM, link state L1 handling

upstream:
 - torvalds: ce351636c67f75a9f282ab69283be231d2c8e845 # PCI: rcar: Add suspend/resume
 - torvalds: a115b1bd3af0c2963e72f6e47143724c59251be6 # PCI: rcar: Add L1 link state fix into data abort hook

comments:
  - "PCIe suspend causes an exception which needs to be handled"
  - "For Gen3, a fix was made for ATF: https://github.com/ARM-software/arm-trusted-firmware/commit/0969397f295621aa26b3d14b76dd397d22be58bf"
  - "For Gen2, a similar approach needs to be taken with hooks for Linux exception handling"
  - "v1: https://patchwork.kernel.org/patch/11772083/"
  - "v2: https://patchwork.kernel.org/patch/11801531/"
  - "v3: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20201011160045.574323-1-marek.vasut@gmail.com/"
  - "v4: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20201016120416.7008-1-marek.vasut@gmail.com/"
  - "on-going disucssion with PCI maintainers"
  - "after more discussion, PCI maintainers suggest to drop L1 entirely"
  - "Marek is busy currently but has not forgotten about it"
  - "v5: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20210411185030.8818-1-marek.vasut@gmail.com/"
  - "v6: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20210514200549.431275-1-marek.vasut@gmail.com/"
  - "v7: https://patchwork.kernel.org/project/linux-renesas-soc/patch/20210815181650.132579-1-marek.vasut@gmail.com/"
  - "finally merged!"