Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20;
Date:   Wed, 19 Jul 2023 15:16:48 -0400
From:   Frank Li <Frank.li@nxp.com>
To:     Manivannan Sadhasivam <mani@kernel.org>
Cc:     Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>,
        helgaas@kernel.org, imx@lists.linux.dev, bhelgaas@google.com,
        devicetree@vger.kernel.org, gustavo.pimentel@synopsys.com,
        kw@linux.com, leoyang.li@nxp.com,
        linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com,
        linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
        lorenzo.pieralisi@arm.com, minghuan.lian@nxp.com,
        mingkai.hu@nxp.com, robh+dt@kernel.org, roy.zang@nxp.com,
        shawnguo@kernel.org, zhiqiang.hou@nxp.com
Subject: Re: [PATCH v3 1/2] PCI: dwc: Implement general suspend/resume
 functionality for L2/L3 transitions
Message-ID: <ZLg2oObBfmhSzTFg@lizhi-Precision-Tower-5810>
References: <20230419164118.596300-1-Frank.Li@nxp.com>
 <20230717164526.GC35455@thinkpad>
 <ZLWKI1lRqxejfUgK@lizhi-Precision-Tower-5810>
 <20230718100400.GB4771@thinkpad>
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <20230718100400.GB4771@thinkpad>
MIME-Version: 1.0
X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1
X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?hSWfezw0jRyN3gjvONhBNuoYi2aEpWLrRJ1b78xzw8ojAEK//F0/6FLfLY9L?=
 =?us-ascii?Q?iyLtFh2GMvW/gy9O9AiXdYOnFUtTuifzAaiUqPxwlqUOlCrv/FBHaJ8KhWpS?=
 =?us-ascii?Q?ag/945i+Z2VTIcMCMA6bY3TuUn4WrOX2yQQ51rz68btiVUCffS2yxtPsAUR1?=
 =?us-ascii?Q?CFKmxvGn+W8lnJwtAlYFolZqLVxnavZIvZRnC1HuoGyqA7cm/IiaIhZKdsY3?=
 =?us-ascii?Q?nMdMrqePYDCi2y1xgOD1Aj/a5Y+BCAGy2BXWZr3o8y2/XzLN9KZiB26IqW0G?=
 =?us-ascii?Q?hUa2mgP9/fluyJ+fwaHblEcu95BAAhTAxPTkoE77M3YxRhSnwv+LRbNIazMs?=
 =?us-ascii?Q?qZtYUXbUNuIMGRa7zgAMRmNd0hlAvgrfmojHF1+uurwyrvkWBMlfhqMElZ2U?=
 =?us-ascii?Q?geLguYZlR3iGlYXmhK2LJ6vQigRt2at4I8TEbC13/baxjdyHyrw6DNhmVjjR?=
 =?us-ascii?Q?OGnjX9ZuZDF9mwaFMRGYYmqutUjt0WZKyt0L/6KTbNy8P0rcfD8Ig/ISrZMC?=
 =?us-ascii?Q?vmEu3jihmAoBX10zKipU891UC1/cb+llpIyTdi7xJ9bM6Z/g6mMctvS2KNZq?=
 =?us-ascii?Q?zbXZjqzcVrWHHtiwG0J+14R+6RIA1ChZaiCY4HXAqM+5vXMnPc+6iIUvox/a?=
 =?us-ascii?Q?7gW/GmrVazBuPkJAj/ycxJgm3c94vHnXpS+tgCzl4HSGcOEJpnSJxDVQacD4?=
 =?us-ascii?Q?iX8XyVbkS4g6svDtFoFd1ZTKXhbn9c8BWQhgQ+2UUwSw0vAjQh4ZPo0CKsPf?=
 =?us-ascii?Q?PAaS6fhENH1iJdmN2z7cwxLCFgISlFZLGA2SV1d1zyzDO3LHVnxJPgXckDIl?=
 =?us-ascii?Q?aGvjiPYus8zDdIWyCBZlwjzW390cQIBk050Y/RAjjBwOM2grDxcmSgy7H7fX?=
 =?us-ascii?Q?v+ddLKLvaGtAU5504NTdFGCAR2XD+zcDHgteDt3LmHmXSVp9vCePvdITISkJ?=
 =?us-ascii?Q?zI7fCbQ3V1H1+GumbkQag5UvNAYTDGdV7K5pia9nya2HYY7w5P5U53Owq0rA?=
 =?us-ascii?Q?ZWAhhKiRf7KcOmBG353Xt0iGn2ZK0OLPc9D1UyXwO2zy023HrBpZisAYRYZ6?=
 =?us-ascii?Q?HnmondclYLkt5uU1/3tCzUSErVp9otgxHDVIojy/YQocv/2unsXtis0RIzzF?=
 =?us-ascii?Q?lt9BYdlpdPq9niQDdKvczJVPgjT9FjEFkpvEnu3WeV2NmgAacF3zBPOAR/th?=
 =?us-ascii?Q?jQkd0zsvBTXvZPqbwyCEAL/KtHeAk/Nbkdkq0QaQK8nBQTiJQM4SVDQuBrVA?=
 =?us-ascii?Q?6WCMf9gqXAzB9Xd107F/f2FyWGOhR4xpbJOKHvPTppTE8sVCZrK4Q3Qr83K+?=
 =?us-ascii?Q?h1bXXBlWRwPAZwfhckWmDW4wLpBQPMPdyAHjKupeXqFbAuaW5e3BxXCEE2JS?=
 =?us-ascii?Q?W4uht3RupPNKlIkLMg8CBkFGKcBsBbhvqpFRgP8i+F9bnqxZc2wGAaV96CL0?=
 =?us-ascii?Q?p/aZGlCK6O5kSA5U/4jdixC2XvVevr8ciWEKwLv9E7bptW2SG0XyrU7lACFP?=
 =?us-ascii?Q?bKfSCHva464laAzj+osG+NepGuBFFZzEbyy5o09f3UJHpGJxmUEIFq+BebNO?=
 =?us-ascii?Q?OZyyd5kOio4EM/lYCEsl0FUGQ/4fpBxj6KQVVjZD?=
X-OriginatorOrg: nxp.com
X-MS-Exchange-CrossTenant-Network-Message-Id: 2568a258-7247-4277-555b-08db888cb949
X-MS-Exchange-CrossTenant-AuthSource: AM6PR04MB4838.eurprd04.prod.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Internal
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Jul 2023 19:16:58.9562
 (UTC)
X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted
X-MS-Exchange-CrossTenant-Id: 686ea1d3-bc2b-4c6f-a92c-d99c5c301635
X-MS-Exchange-CrossTenant-MailboxType: HOSTED
X-MS-Exchange-CrossTenant-UserPrincipalName: leXtUWt9XFWtTDwjBwVVQsU193P1aiT+9EsjKHpa/Ayh5W01hxR9psFdfzenF7Jg6+GIdALQqXbl4cFIAWUxNA==
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DB8PR04MB6796
X-Spam-Status: No, score=-2.1 required=5.0 tests=BAYES_00,DKIM_SIGNED,
        DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,RCVD_IN_DNSWL_BLOCKED,
        RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_PASS,T_SCC_BODY_TEXT_LINE,
        URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6
X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on
        lindbergh.monkeyblade.net
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

On Tue, Jul 18, 2023 at 03:34:00PM +0530, Manivannan Sadhasivam wrote:
> On Mon, Jul 17, 2023 at 02:36:19PM -0400, Frank Li wrote:
> 
> Fine then. But can we check for PM_LINKST_IN_L2 SII System Information Interface
> (SII) instead of LTSSM state?
>
where define PM_LINKST_IN_L2? I just find one at

drivers/pci/controller/dwc/pcie-qcom.c:#define PARF_DEBUG_CNT_PM_LINKST_IN_L2           0xc04

Frank