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From:   Nadeem Athani <nadeem@cadence.com>
To:     <tjoseph@cadence.com>, <lorenzo.pieralisi@arm.com>,
        <robh@kernel.org>, <bhelgaas@google.com>, <kishon@ti.com>,
        <linux-omap@vger.kernel.org>, <linux-pci@vger.kernel.org>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>
CC:     <nadeem@cadence.com>, <mparab@cadence.com>, <sjakhade@cadence.com>,
        <pthombar@cadence.com>
Subject: [PATCH v7 0/2] PCI: cadence: Retrain Link to work around Gen2
Date:   Wed, 30 Dec 2020 13:05:13 +0100
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Cadence controller will not initiate autonomous speed change if strapped
as Gen2. The Retrain Link bit is set as quirk to enable this speed change.
Adding a quirk flag for defective IP. In future IP revisions this will not
be applicable.

Version history:
Changes in v7:
- Changing the commit title of patch 1 in this series.
- Added a return value for function cdns_pcie_retrain().
Changes in v6:
- Move the position of function cdns_pcie_host_wait_for_link to remove
  compilation error. No changes in code. Separate patch for this.
Changes in v5:
- Remove the compatible string based setting of quirk flag.
- Removed additional Link Up Check
- Removed quirk from pcie-cadence-plat.c and added in pci-j721e.c
Changes in v4:
- Added a quirk flag based on a new compatible string.
- Change of api for link up: cdns_pcie_host_wait_for_link().
Changes in v3:
- To set retrain link bit,checking device capability & link status.
- 32bit read in place of 8bit.
- Minor correction in patch comment.
- Change in variable & macro name.
Changes in v2:
- 16bit read in place of 8bit.

Nadeem Athani (2):
  PCI: cadence: Shifting of a function to support new code.
  PCI: cadence: Retrain Link to work around Gen2 training defect.

 drivers/pci/controller/cadence/pci-j721e.c         |  3 +
 drivers/pci/controller/cadence/pcie-cadence-host.c | 70 ++++++++++++++++------
 drivers/pci/controller/cadence/pcie-cadence.h      | 11 +++-
 3 files changed, 65 insertions(+), 19 deletions(-)

-- 
2.15.0