* [PATCH v1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX
@ 2026-02-28 8:09 Richard Zhu
2026-03-12 14:56 ` Frank Li
2026-03-26 16:53 ` Manivannan Sadhasivam
0 siblings, 2 replies; 3+ messages in thread
From: Richard Zhu @ 2026-02-28 8:09 UTC (permalink / raw)
To: frank.li, l.stach, lpieralisi, kwilczynski, mani, robh, bhelgaas,
s.hauer, kernel, festevam
Cc: linux-pci, linux-arm-kernel, imx, linux-kernel, Richard Zhu,
stable
On i.MX6SX, the LTSSM registers become inaccessible after the
PME_Turn_Off message is sent to the link. This prevents verification
of whether the link has successfully entered the L2/L3 Ready state.
Add a new flag 'IMX_PCIE_FLAG_SKIP_L23_READY' to skip the L2/L3 Ready
state check specifically for i.MX6SX PCIe controllers.
Fixes: a528d1a72597 ("PCI: imx6: Use DWC common suspend resume method")
Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
Cc: stable@vger.kernel.org
---
drivers/pci/controller/dwc/pci-imx6.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
index 2d01c21b5570..4385cb18e240 100644
--- a/drivers/pci/controller/dwc/pci-imx6.c
+++ b/drivers/pci/controller/dwc/pci-imx6.c
@@ -1871,6 +1871,7 @@ static const struct imx_pcie_drvdata drvdata[] = {
.variant = IMX6SX,
.flags = IMX_PCIE_FLAG_IMX_PHY |
IMX_PCIE_FLAG_SPEED_CHANGE_WORKAROUND |
+ IMX_PCIE_FLAG_SKIP_L23_READY |
IMX_PCIE_FLAG_SUPPORTS_SUSPEND,
.gpr = "fsl,imx6q-iomuxc-gpr",
.ltssm_off = IOMUXC_GPR12,
--
2.37.1
^ permalink raw reply related [flat|nested] 3+ messages in thread* Re: [PATCH v1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX
2026-02-28 8:09 [PATCH v1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX Richard Zhu
@ 2026-03-12 14:56 ` Frank Li
2026-03-26 16:53 ` Manivannan Sadhasivam
1 sibling, 0 replies; 3+ messages in thread
From: Frank Li @ 2026-03-12 14:56 UTC (permalink / raw)
To: Richard Zhu
Cc: l.stach, lpieralisi, kwilczynski, mani, robh, bhelgaas, s.hauer,
kernel, festevam, linux-pci, linux-arm-kernel, imx, linux-kernel,
stable
On Sat, Feb 28, 2026 at 04:09:25PM +0800, Richard Zhu wrote:
> On i.MX6SX, the LTSSM registers become inaccessible after the
> PME_Turn_Off message is sent to the link. This prevents verification
> of whether the link has successfully entered the L2/L3 Ready state.
>
> Add a new flag 'IMX_PCIE_FLAG_SKIP_L23_READY' to skip the L2/L3 Ready
> state check specifically for i.MX6SX PCIe controllers.
>
> Fixes: a528d1a72597 ("PCI: imx6: Use DWC common suspend resume method")
> Signed-off-by: Richard Zhu <hongxing.zhu@nxp.com>
> Cc: stable@vger.kernel.org
> ---
Reviewed-by: Frank Li <Frank.Li@nxp.com>
> drivers/pci/controller/dwc/pci-imx6.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/pci/controller/dwc/pci-imx6.c b/drivers/pci/controller/dwc/pci-imx6.c
> index 2d01c21b5570..4385cb18e240 100644
> --- a/drivers/pci/controller/dwc/pci-imx6.c
> +++ b/drivers/pci/controller/dwc/pci-imx6.c
> @@ -1871,6 +1871,7 @@ static const struct imx_pcie_drvdata drvdata[] = {
> .variant = IMX6SX,
> .flags = IMX_PCIE_FLAG_IMX_PHY |
> IMX_PCIE_FLAG_SPEED_CHANGE_WORKAROUND |
> + IMX_PCIE_FLAG_SKIP_L23_READY |
> IMX_PCIE_FLAG_SUPPORTS_SUSPEND,
> .gpr = "fsl,imx6q-iomuxc-gpr",
> .ltssm_off = IOMUXC_GPR12,
> --
> 2.37.1
>
^ permalink raw reply [flat|nested] 3+ messages in thread* Re: [PATCH v1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX
2026-02-28 8:09 [PATCH v1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX Richard Zhu
2026-03-12 14:56 ` Frank Li
@ 2026-03-26 16:53 ` Manivannan Sadhasivam
1 sibling, 0 replies; 3+ messages in thread
From: Manivannan Sadhasivam @ 2026-03-26 16:53 UTC (permalink / raw)
To: frank.li, l.stach, lpieralisi, kwilczynski, robh, bhelgaas,
s.hauer, kernel, festevam, Richard Zhu
Cc: linux-pci, linux-arm-kernel, imx, linux-kernel, stable
On Sat, 28 Feb 2026 16:09:25 +0800, Richard Zhu wrote:
> On i.MX6SX, the LTSSM registers become inaccessible after the
> PME_Turn_Off message is sent to the link. This prevents verification
> of whether the link has successfully entered the L2/L3 Ready state.
>
> Add a new flag 'IMX_PCIE_FLAG_SKIP_L23_READY' to skip the L2/L3 Ready
> state check specifically for i.MX6SX PCIe controllers.
>
> [...]
Applied, thanks!
[1/1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX
commit: 5f73cf1db829c21b7fd44a8d2587cd395b1b2d76
Best regards,
--
Manivannan Sadhasivam <mani@kernel.org>
^ permalink raw reply [flat|nested] 3+ messages in thread
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2026-02-28 8:09 [PATCH v1] PCI: imx6: Skip waiting for L2/L3 Ready on i.MX6SX Richard Zhu
2026-03-12 14:56 ` Frank Li
2026-03-26 16:53 ` Manivannan Sadhasivam
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