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Fri, 05 Apr 2024 11:11:31 -0700 (PDT) Received: from umbar.lan ([192.130.178.91]) by smtp.gmail.com with ESMTPSA id d19-20020ac25453000000b00516c580b640sm254387lfn.13.2024.04.05.11.11.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 05 Apr 2024 11:11:30 -0700 (PDT) From: Dmitry Baryshkov Date: Fri, 05 Apr 2024 21:11:30 +0300 Subject: [PATCH] usb: typec: qcom-pmic-typec: split HPD bridge alloc and registration Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20240405-qc-pmic-typec-hpd-split-v1-1-363daafb3c36@linaro.org> X-B4-Tracking: v=1; b=H4sIANE+EGYC/x3MQQqDQAxA0atI1g3EMAXtVaSLNpPWgNo4M5SKe HeHLt/i/x2yJtMMt2aHpF/L9lkq2ksDMj6Wt6LFamDiQIGuuAr6bIJlcxUcPWL2yQoydxSY2p7 4CbX2pC/7/c/D/ThO7ki9UGkAAAA= To: Bryan O'Donoghue , Heikki Krogerus , Bjorn Andersson , Konrad Dybcio , Greg Kroah-Hartman Cc: linux-arm-msm@vger.kernel.org, linux-usb@vger.kernel.org, linux-kernel@vger.kernel.org, Caleb Connolly , Dmitry Baryshkov X-Mailer: b4 0.13.0 X-Developer-Signature: v=1; a=openpgp-sha256; l=1990; i=dmitry.baryshkov@linaro.org; h=from:subject:message-id; bh=Q67+S6V3QHztyCWOwIh90pzBvONFSy99V7/W4B38ll0=; b=owEBbQGS/pANAwAKAYs8ij4CKSjVAcsmYgBmED7SqcNNLHSudEvUbG6dnxGcnQs9/bVZtDJlL KiAi9anaTKJATMEAAEKAB0WIQRMcISVXLJjVvC4lX+LPIo+Aiko1QUCZhA+0gAKCRCLPIo+Aiko 1fwjCACEkmWtqqAt2NCd4c1cEGh4vQpwrpTZuocaOfLHk3golMIxsiaoxIdwR8B76LcU2hrLDv/ /gcKINvWRyVruDgMSB0EYzeA4wJZXoX5Tqc+Z4OFpVsS/74dVVSFZsMgVLkVNoKCvwRVNCG8ruL yPuDfFiOIOYMx2YCDa64uk6VMJUeKD2xuOLpNzOaoLGAdh2uvR4pKRMkshZJuFZ+jlEsMB7nCoh JPACJyiYfUKPq1QIODlWyk0JOSs1v3MKczcMkoBHPGBjxLj7jJjqzqS4i3yIy2e7JeOSYhO5Xs6 Jx4ZGkN1xeYx4xDNSIuY2Us0Fg/6jStsGcaKo+Xp+RNHB5zI X-Developer-Key: i=dmitry.baryshkov@linaro.org; a=openpgp; fpr=8F88381DD5C873E4AE487DA5199BF1243632046A If a probe function returns -EPROBE_DEFER after creating another device there is a change of ening up in a probe deferral loop, (see commit fbc35b45f9f6 ("Add documentation on meaning of -EPROBE_DEFER"). In order to prevent such probe-defer loops caused by qcom-pmic-typec driver, use the API added by Johan Hoval and move HPD bridge registeration to the end of the probe function. Reported-by: Caleb Connolly Signed-off-by: Dmitry Baryshkov Acked-by: Bryan O'Donoghue --- drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) --- base-commit: a6bd6c9333397f5a0e2667d4d82fef8c970108f2 change-id: 20240405-qc-pmic-typec-hpd-split-22804201902b Best regards, diff --git a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c index e48412cdcb0f..96b41efae318 100644 --- a/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c +++ b/drivers/usb/typec/tcpm/qcom/qcom_pmic_typec.c @@ -41,7 +41,7 @@ static int qcom_pmic_typec_probe(struct platform_device *pdev) struct device_node *np = dev->of_node; const struct pmic_typec_resources *res; struct regmap *regmap; - struct device *bridge_dev; + struct auxiliary_device *bridge_dev; u32 base; int ret; @@ -92,7 +92,7 @@ static int qcom_pmic_typec_probe(struct platform_device *pdev) if (!tcpm->tcpc.fwnode) return -EINVAL; - bridge_dev = drm_dp_hpd_bridge_register(tcpm->dev, to_of_node(tcpm->tcpc.fwnode)); + bridge_dev = devm_drm_dp_hpd_bridge_alloc(tcpm->dev, to_of_node(tcpm->tcpc.fwnode)); if (IS_ERR(bridge_dev)) return PTR_ERR(bridge_dev); @@ -110,6 +110,10 @@ static int qcom_pmic_typec_probe(struct platform_device *pdev) if (ret) goto fwnode_remove; + ret = devm_drm_dp_hpd_bridge_add(tcpm->dev, bridge_dev); + if (ret) + goto fwnode_remove; + return 0; fwnode_remove: