Re: [PATCH V4 6/6] PCI: tegra: Disable LTSSM during L2 entry

[Thierry Reding]

On Mon, Nov 09, 2020 at 10:49:37PM +0530, Vidya Sagar wrote:
> PCIe cards like Marvell SATA controller and some of the Samsung NVMe
> drives don't support taking the link to L2 state. When the link doesn't
> go to L2 state, Tegra194 requires the LTSSM to be disabled to allow PHY
> to start the next link up process cleanly during suspend/resume sequence.
> Failing to disable LTSSM results in the PCIe link not coming up in the
> next resume cycle.
> 
> Signed-off-by: Vidya Sagar <vidyas@xxxxxxxxxx>
> ---
> V4:
> * New patch in this series
> 
>  drivers/pci/controller/dwc/pcie-tegra194.c | 16 +++++++++-------
>  1 file changed, 9 insertions(+), 7 deletions(-)

Tested-by: Thierry Reding <treding@xxxxxxxxxx>
Acked-by: Thierry Reding <treding@xxxxxxxxxx>

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