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Thu, 7 Jan 2021 19:54:43 +0000 From: Athani Nadeem Ladkhan To: Athani Nadeem Ladkhan , Tom Joseph , "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: Milind Parab , Swapnil Kashinath Jakhade , Parshuram Raju Thombare Subject: RE: [PATCH v7 0/2] PCI: cadence: Retrain Link to work around Gen2 Thread-Topic: [PATCH v7 0/2] PCI: cadence: Retrain Link to work around Gen2 Thread-Index: AQHW3qQOEOO3xLnov0GUSEHX9bvYeqocoECg Date: Thu, 7 Jan 2021 19:54:42 +0000 Message-ID: References: <20201230120515.2348-1-nadeem@cadence.com> In-Reply-To: <20201230120515.2348-1-nadeem@cadence.com> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-dg-ref: PG1ldGE+PGF0IG5tPSJib2R5LnR4dCIgcD0iYzpcdXNlcnNcbmFkZWVtXGFwcGRhdGFccm9hbWluZ1wwOWQ4NDliNi0zMmQzLTRhNDAtODVlZS02Yjg0YmEyOWUzNWJcbXNnc1xtc2ctMmNkNzk0MzQtNTEyMi0xMWViLWFlOTMtZDQ4MWQ3OWExZmRlXGFtZS10ZXN0XDJjZDc5NDM2LTUxMjItMTFlYi1hZTkzLWQ0ODFkNzlhMWZkZWJvZHkudHh0IiBzej0iMjQzMiIgdD0iMTMyNTQ1MjI4Nzk4MTg1MTk2IiBoPSJWeTZpTmhKckxYZUd1QkFFWGZueENsd0pUcGs9IiBpZD0iIiBibD0iMCIgYm89IjEiLz48L21ldGE+ x-dg-rorf: true x-originating-ip: [59.145.174.78] x-ms-publictraffictype: Email x-ms-office365-filtering-correlation-id: 97507f53-84a1-4235-cc37-08d8b346139b x-ms-traffictypediagnostic: SN1PR07MB4014: x-ms-exchange-transport-forked: True x-microsoft-antispam-prvs: x-ms-oob-tlc-oobclassifiers: OLM:3968; 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charset="us-ascii" Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: cadence.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN2PR07MB2557.namprd07.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: 97507f53-84a1-4235-cc37-08d8b346139b X-MS-Exchange-CrossTenant-originalarrivaltime: 07 Jan 2021 19:54:42.4558 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Hosted X-MS-Exchange-CrossTenant-id: d36035c5-6ce6-4662-a3dc-e762e61ae4c9 X-MS-Exchange-CrossTenant-mailboxtype: HOSTED X-MS-Exchange-CrossTenant-userprincipalname: ufcgVIun8BGB8ZiZRgDt/Z4XXJH0MHzK9mPfVKWr5vEGXpTshPaFgcC0WVs+Z1XbH1Nbqvq3qjKCZoN7/5KaZPea0hVYRZRCo+Cgl7D3pxs= X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN1PR07MB4014 X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.343,18.0.737 definitions=2021-01-07_08:2021-01-07,2021-01-07 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0 suspectscore=0 spamscore=0 lowpriorityscore=0 impostorscore=0 clxscore=1011 adultscore=0 mlxlogscore=999 priorityscore=1501 mlxscore=0 bulkscore=0 phishscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101070115 Precedence: bulk List-ID: X-Mailing-List: linux-pci@vger.kernel.org Hello, Requesting to provide review comments. Thanks & Regards, Nadeem Athani > -----Original Message----- > From: Nadeem Athani > Sent: Wednesday, December 30, 2020 5:35 PM > To: Tom Joseph ; 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: Athani Nadeem Ladkhan ; Milind Parab > ; Swapnil Kashinath Jakhade > ; Parshuram Raju Thombare > > Subject: [PATCH v7 0/2] PCI: cadence: Retrain Link to work around Gen2 >=20 > 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 no= t be > applicable. >=20 > 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. >=20 > Nadeem Athani (2): > PCI: cadence: Shifting of a function to support new code. > PCI: cadence: Retrain Link to work around Gen2 training defect. >=20 > 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(-) >=20 > -- > 2.15.0