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Mon, 06 Nov 2023 11:52:51 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3A6Bqo6r014804 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 6 Nov 2023 11:52:50 GMT Received: from hu-krichai-hyd.qualcomm.com (10.80.80.8) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.39; Mon, 6 Nov 2023 03:52:45 -0800 From: Krishna chaitanya chundru Subject: [PATCH 0/2] phy: qcom-qmp-pcie: Add support to keep refclk always on Date: Mon, 6 Nov 2023 17:22:33 +0530 Message-ID: <20231106-refclk_always_on-v1-0-17a7fd8b532b@quicinc.com> Precedence: bulk X-Mailing-List: devicetree@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-B4-Tracking: v=1; b=H4sIAILTSGUC/x2MWwqAIBAArxL7nZAGpV0lQtS2WgoLhR6Ed0/6H JiZFyIGwghd8ULAkyLtPgMvC3CL8TMyGjODqETNedWwgJPbVm22yzxR754piwalUK2zEnJ2ZIP uf9kPKX22j9GLYgAAAA== To: Andy Gross , Bjorn Andersson , Konrad Dybcio , Vinod Koul , Kishon Vijay Abraham I , Rob Herring , Krzysztof Kozlowski , Conor Dooley CC: , , , , , , , , , , "Krishna chaitanya chundru" X-Mailer: b4 0.13-dev-83828 X-Developer-Signature: v=1; a=ed25519-sha256; t=1699271564; l=1149; i=quic_krichai@quicinc.com; s=20230907; h=from:subject:message-id; bh=rOqRd8dUZXBv8AK+fFRgy5WFi6zRJCdIHc+U2YfEafk=; b=rS5if1xwJXYJ31AXMIj/0x3LJ8ePUkfqSStWanLdLMfdi/BjMDcDeO6Sh/ocSJNx/dMHP6tFy qhQo2K3bG+CD8Ovi1Fd7nJYl1WPot3X4mbxtMgnMEno97FfCk3tixJ0 X-Developer-Key: i=quic_krichai@quicinc.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: daU4FlACUj3NOompZky48E78CpQgzj66 X-Proofpoint-ORIG-GUID: daU4FlACUj3NOompZky48E78CpQgzj66 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.987,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-06_10,2023-11-02_03,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 adultscore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=573 priorityscore=1501 spamscore=0 impostorscore=0 mlxscore=0 malwarescore=0 clxscore=1011 bulkscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2310240000 definitions=main-2311060098 This series adds support to provide refclk to endpoint even in low power states. Due to some platform specific issues with CLKREQ signal, it is not being propagated to the host and as host doesn't know the clkreq signal host is not sending refclk. Due to this endpoint is seeing linkdown and going to bad state. To avoid those ref clk should be provided always to the endpoint. The issue is coming only when ep intiates the L1.1 or L1.2 exit and clkreq is not being propagated properly to the host. Signed-off-by: Krishna chaitanya chundru --- Krishna chaitanya chundru (2): dt-bindings: phy: qcom,qmp: Add PCIe qcom,refclk-always-on property phy: qcom-qmp-pcie: Add support for keeping refclk always on .../bindings/phy/qcom,sc8280xp-qmp-pcie-phy.yaml | 5 +++++ drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 21 +++++++++++++++++---- 2 files changed, 22 insertions(+), 4 deletions(-) --- base-commit: 71e68e182e382e951d6248bccc3c960dcec5a718 change-id: 20231106-refclk_always_on-9beae8297cb8 Best regards,