Am Dienstag, dem 30.08.2022 um 02:58 +0000 schrieb Hongxing Zhu:

quoted

-----Original Message-----
From: Lucas Stach <l.stach@pengutronix.de>
Sent: 2022年8月29日 23:20
To: Hongxing Zhu <hongxing.zhu@nxp.com>; p.zabel@pengutronix.de;
bhelgaas@google.com; lorenzo.pieralisi@arm.com; robh@kernel.org;
shawnguo@kernel.org; vkoul@kernel.org; alexander.stein@ew.tq-group.com;
marex@denx.de; richard.leitner@linux.dev
Cc: linux-phy@lists.infradead.org; devicetree@vger.kernel.org;
linux-pci@vger.kernel.org; linux-arm-kernel@lists.infradead.org;
linux-kernel@vger.kernel.org; kernel@pengutronix.de; dl-linux-imx
[off-list ref]
Subject: Re: [PATCH v4 0/6] Add iMX8MP PCIe support

Hi Richard,

instead of review comments I sent you a two patches to rework things more to
my liking. Hope you agree with the approach.

One question, though: did you test this with devices with Gen2/3 speeds? The
Marvell WiFi module on my EVK board only links with Gen1, while it claims
Gen2 speed in the LnkCap register. However, it does seem to come up with
Gen1 as the target link speed in LnkCtl2, so maybe the device is at fault here.

Hi Lucas:
Thanks for your help on this series.
I'm agree with your approach, and let blk-ctrl driver do the hsiomix resets.
Can I include the #1 patch into this series, and rebase the 2# fixup! patch
 into the phy changes patch with your sign-off?

Sure, that's why I sent them this way. Feel free to include them in
your series with my sign-off.

Yes, I did the Gen3 NVEM device tests on i.MX8MP EVK board.
The Gen3 works fine.
Logs:
"
[    1.808033] phy phy-32f00000.pcie-phy.1: phy_power_on was called before phy_init
[    1.822609] imx6q-pcie 33800000.pcie: iATU unroll: enabled
[    1.836620] imx6q-pcie 33800000.pcie: iATU regions: 4 ob, 4 ib, align 64K, limit 16G
[    1.950427] imx6q-pcie 33800000.pcie: PCIe Gen.1 x1 link up
[    2.058138] imx6q-pcie 33800000.pcie: PCIe Gen.3 x1 link up
[    2.063731] imx6q-pcie 33800000.pcie: Link up, Gen3
[    2.068619] imx6q-pcie 33800000.pcie: PCIe Gen.3 x1 link up
"

Thanks for the confirmation.

Also can you please reorder the series, to have the DT changes at the
end?

Regards,
Lucas

Best Regards
Richard Zhu

quoted

Regards,
Lucas

Am Montag, dem 29.08.2022 um 16:15 +0800 schrieb Richard Zhu:

quoted

Based on the 6.0-rc1 of the pci/next branch.
This series adds the i.MX8MP PCIe support and tested on i.MX8MP EVK
board when one PCIe NVME device is used.

- i.MX8MP PCIe has reversed initial PERST bit value refer to

i.MX8MQ/i.MX8MM.

quoted

  Add the PHY PERST explicitly for i.MX8MP PCIe PHY.
- Add the i.MX8MP PCIe PHY support in the i.MX8M PCIe PHY driver.
  And share as much as possible codes with i.MX8MM PCIe PHY.
- Add the i.MX8MP PCIe support in binding document, DTS files, and PCIe
  driver.

Main changes v3-->v4:
- Regarding Phillip's suggestions, add fix tag into the first commit.
- Add Reviewed and Tested tags.

Main changes v2-->v3:
- Fix the schema checking error in the PHY dt-binding patch.
- Inspired by Lucas, the PLL configurations might not required when
  external OSC is used as PCIe referrence clock. It's true. Remove all
  the HSIO PLL bit manipulations, and PCIe works fine on i.MX8MP EVK

board

quoted

  with one NVME device is used.
- Drop the #4 patch of v2, since it had been applied by Rob.

Main changes v1-->v2:
- It's my fault forget including Vinod, re-send v2 after include Vinod
  and linux-phy@lists.infradead.org.
- List the basements of this patch-set. The branch, codes changes and so on.
- Clean up some useless register and bit definitions in #3 patch.

Documentation/devicetree/bindings/phy/fsl,imx8-pcie-phy.yaml |  16

+++++++--

quoted

arch/arm64/boot/dts/freescale/imx8mp-evk.dts                 |  53

+++++++++++++++++++++++++++++

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arch/arm64/boot/dts/freescale/imx8mp.dtsi                    |  46

++++++++++++++++++++++++-

quoted

drivers/pci/controller/dwc/pci-imx6.c                        |  17

+++++++++-

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drivers/phy/freescale/phy-fsl-imx8m-pcie.c                   | 150

+++++++++++++++++++++++++++++++++++++++++++++++++++++++++-------
------------------

quoted

drivers/reset/reset-imx7.c                                   |   1 +
6 files changed, 232 insertions(+), 51 deletions(-)

[PATCH v4 1/6] reset: imx7: Fix the iMX8MP PCIe PHY PERST support
[PATCH v4 2/6] dt-binding: phy: Add iMX8MP PCIe PHY binding [PATCH v4
3/6] phy: freescale: imx8m-pcie: Add iMX8MP PCIe PHY [PATCH v4 4/6]
arm64: dts: imx8mp: Add iMX8MP PCIe support [PATCH v4 5/6] arm64: dts:
imx8mp-evk: Add PCIe support [PATCH v4 6/6] PCI: imx6: Add iMX8MP PCIe
support

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