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linux/drivers/pci/controller
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Siddharth Vadapalli 0e12f83023 PCI: cadence: Fix Gen2 Link Retraining process 
The Link Retraining process is initiated to account for the Gen2 defect in
the Cadence PCIe controller in J721E SoC. The errata corresponding to this
is i2085, documented at:
https://www.ti.com/lit/er/sprz455c/sprz455c.pdf

The existing workaround implemented for the errata waits for the Data Link
initialization to complete and assumes that the link retraining process
at the Physical Layer has completed. However, it is possible that the
Physical Layer training might be ongoing as indicated by the
PCI_EXP_LNKSTA_LT bit in the PCI_EXP_LNKSTA register.

Fix the existing workaround, to ensure that the Physical Layer training
has also completed, in addition to the Data Link initialization.

Link: https://lore.kernel.org/r/20230315070800.1615527-1-s-vadapalli@ti.com
Fixes: 4740b969aa ("PCI: cadence: Retrain Link to work around Gen2 training defect")
Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
Signed-off-by: Lorenzo Pieralisi <lpieralisi@kernel.org>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
2023-05-08 09:16:57 +02:00
..
cadence PCI: cadence: Fix Gen2 Link Retraining process 2023-05-08 09:16:57 +02:00
dwc pci-v6.4-changes 2023-04-27 10:45:30 -07:00
mobiveil PCI: mobiveil: Sort Kconfig entries by vendor 2023-04-20 16:18:05 -05:00
Kconfig PCI: xilinx: Drop obsolete dependency on COMPILE_TEST 2023-04-20 16:18:05 -05:00
Makefile Merge branch 'pci/host/mt7621' 2021-11-05 11:28:51 -05:00
pci-aardvark.c PCI: aardvark: Switch to using devm_gpiod_get_optional() 2022-12-07 08:19:53 -06:00
pci-ftpci100.c PCI: Drop of_match_ptr() to avoid unused variables 2022-11-17 13:32:21 -06:00
pci-host-common.c PCI/MSI: Make pci_host_common_probe() declare its reliance on MSI domains 2021-04-20 14:11:22 +01:00
pci-host-generic.c PCI: Unify ECAM constants in native PCI Express drivers 2020-12-10 14:55:49 -06:00
pci-hyperv-intf.c PCI: hv: Add a Hyper-V PCI interface driver for software backchannel interface 2019-08-22 00:25:12 -07:00
pci-hyperv.c PCI: hv: Replace retarget_msi_interrupt_params with hyperv_pcpu_input_arg 2023-04-21 21:25:23 +00:00
pci-ixp4xx.c PCI: ixp4xx: Use PCI_CONF1_ADDRESS() macro 2023-03-24 16:48:32 +01:00
pci-loongson.c PCI: loongson: Add more devices that need MRRS quirk 2023-02-13 15:29:27 -06:00
pci-mvebu.c Merge branch 'pci/kbuild' 2022-12-10 10:36:52 -06:00
pci-rcar-gen2.c PCI: rcar-gen2: Add RZ/N1 SOC family compatible string 2022-06-23 17:37:05 -05:00
pci-tegra.c PCI: Use of_property_present() for testing DT property presence 2023-04-18 16:01:37 -05:00
pci-thunder-ecam.c PCI: thunder: Drop error data fabrication when config read fails 2021-11-18 13:39:32 -06:00
pci-thunder-pem.c PCI: thunder: Drop error data fabrication when config read fails 2021-11-18 13:39:32 -06:00
pci-v3-semi.c PCI: Drop of_match_ptr() to avoid unused variables 2022-11-17 13:32:21 -06:00
pci-versatile.c PCI: Remove MODULE_LICENSE so boolean drivers don't look like modules 2023-02-17 08:47:58 -06:00
pci-xgene-msi.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pci-xgene.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-altera-msi.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-altera.c Merge branch 'pci/driver-cleanup' 2022-01-13 09:57:53 -06:00
pcie-apple.c PCI: apple: Do not leak reset GPIO on unbind/unload/error 2022-09-14 17:45:47 +02:00
pcie-brcmstb.c PCI: brcmstb: Set RCB_{MPS,64B}_MODE bits 2022-11-11 11:42:05 +01:00
pcie-hisi-error.c PCI: Remove MODULE_LICENSE so boolean drivers don't look like modules 2023-02-17 08:47:58 -06:00
pcie-iproc-bcma.c PCI: Add defines for normal and subtractive PCI bridges 2022-02-17 15:29:35 -06:00
pcie-iproc-msi.c PCI: iproc: Use bitmap API to allocate bitmaps 2022-07-05 15:02:56 -05:00
pcie-iproc-platform.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-iproc.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-iproc.h PCI: Fix kernel-doc formatting 2021-07-06 10:37:46 -05:00
pcie-mediatek-gen3.c PCI: mediatek-gen3: Change driver name to mtk-pcie-gen3 2022-08-23 14:58:49 +02:00
pcie-mediatek.c PCI: Use of_property_present() for testing DT property presence 2023-04-18 16:01:37 -05:00
pcie-microchip-host.c PCI: Remove MODULE_LICENSE so boolean drivers don't look like modules 2023-02-17 08:47:58 -06:00
pcie-mt7621.c PCI: mt7621: Use dev_info() to log PCIe card detection 2023-03-24 16:36:22 +01:00
pcie-rcar-ep.c PCI: rcar-ep: Remove unneeded includes 2021-10-08 09:41:38 -05:00
pcie-rcar-host.c PCI: rcar: Avoid defines prefixed with CONFIG 2023-03-10 13:34:27 +01:00
pcie-rcar.c PCI: rcar: Fix calculating mask for PCIEPAMR register 2020-05-11 11:29:48 +01:00
pcie-rcar.h PCI: rcar: Avoid defines prefixed with CONFIG 2023-03-10 13:34:27 +01:00
pcie-rockchip-ep.c PCI: rockchip: Fix find_first_zero_bit() limit 2022-04-08 14:42:07 +01:00
pcie-rockchip-host.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-rockchip.c PCI: rockchip: Make 'ep-gpios' DT property optional 2021-02-23 14:23:50 -06:00
pcie-rockchip.h PCI: Add defines for normal and subtractive PCI bridges 2022-02-17 15:29:35 -06:00
pcie-xilinx-cpm.c PCI: Remove unnecessary <linux/of_irq.h> includes 2022-11-10 14:53:51 -06:00
pcie-xilinx-nwl.c Merge branch 'pci/kbuild' 2022-12-10 10:36:52 -06:00
pcie-xilinx.c PCI: xilinx: Rename xilinx_pcie_port to xilinx_pcie 2022-01-03 15:05:28 -06:00
vmd.c PCI: vmd: Add quirk to configure PCIe ASPM and LTR 2023-02-02 16:02:40 +01:00