src/patches/linux/aarch64/0006-pcie-rockchip-host-try-again-if-training-fail.patch

   1 From 828dc7d5beca4c10db50330d1858cd70588bff5d Mon Sep 17 00:00:00 2001
   2 From: Arne Fitzenreiter <arne_f@ipfire.org>
   3 Date: Sat, 5 Feb 2022 15:35:57 +0000
   4 Subject: [PATCH 6/8] pcie-rockchip-host: try again if training fail.
   5
   6 on NanoPi R4S the training of the pcie often fails at first try
   7 so this try again some times.
   8
   9 Signed-off-by: Arne Fitzenreiter <arne_f@ipfire.org>
  10 ---
  11  drivers/pci/controller/pcie-rockchip-host.c | 12 ++++++++++--
  12  1 file changed, 10 insertions(+), 2 deletions(-)
  13
  14 diff --git a/drivers/pci/controller/pcie-rockchip-host.c b/drivers/pci/controller/pcie-rockchip-host.c
  15 index afbbdccd195d..5d75189e64e5 100644
  16 --- a/drivers/pci/controller/pcie-rockchip-host.c
  17 +++ b/drivers/pci/controller/pcie-rockchip-host.c
  18 @@ -959,8 +959,16 @@ static int rockchip_pcie_probe(struct platform_device *pdev)
  19         }
  20
  21         err = rockchip_pcie_host_init_port(rockchip);
  22 -       if (err)
  23 -               goto err_vpcie;
  24 +       if (err) {
  25 +               dev_err(dev, "failed to init port, try again...\n");
  26 +               err = rockchip_pcie_host_init_port(rockchip);
  27 +               if (err) {
  28 +                       dev_err(dev, "failed to init port, last try in 500ms.\n");
  29 +                       mdelay(500);
  30 +                       err = rockchip_pcie_host_init_port(rockchip);
  31 +                       if (err) goto err_vpcie;
  32 +               }
  33 +       }
  34
  35         err = rockchip_pcie_init_irq_domain(rockchip);
  36         if (err < 0)
  37 --
  38 2.34.1
  39