linux-kernel - [PATCH v1] PCI: Add ACS quirk for Qualcomm SA8775P

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Message-Id: <20240906052228.1829485-1-quic_skananth@quicinc.com>
Date: Fri,  6 Sep 2024 10:52:27 +0530
From: Subramanian Ananthanarayanan <quic_skananth@...cinc.com>
To: bhelgaas@...gle.com
Cc: quic_krichai@...cinc.com, quic_vbadigan@...cinc.com,
        linux-arm-msm@...r.kernel.org,
        Subramanian Ananthanarayanan <quic_skananth@...cinc.com>,
        linux-pci@...r.kernel.org (open list:PCI SUBSYSTEM),
        linux-kernel@...r.kernel.org (open list)
Subject: [PATCH v1] PCI: Add ACS quirk for Qualcomm SA8775P

The Qualcomm SA8775P root ports don't advertise an ACS capability, but they
do provide ACS-like features to disable peer transactions and validate bus
numbers in requests.

Add an ACS quirk for the SA8775P.

Signed-off-by: Subramanian Ananthanarayanan <quic_skananth@...cinc.com>
---
 drivers/pci/quirks.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
index 507006ff13dd..bc739f04d4b1 100644
--- a/drivers/pci/quirks.c
+++ b/drivers/pci/quirks.c
@@ -5087,6 +5087,8 @@ static const struct pci_dev_acs_enabled {
 	/* QCOM QDF2xxx root ports */
 	{ PCI_VENDOR_ID_QCOM, 0x0400, pci_quirk_qcom_rp_acs },
 	{ PCI_VENDOR_ID_QCOM, 0x0401, pci_quirk_qcom_rp_acs },
+	/* QCOM SA8775P root port */
+	{ PCI_VENDOR_ID_QCOM, 0x0115, pci_quirk_qcom_rp_acs },
 	/* HXT SD4800 root ports. The ACS design is same as QCOM QDF2xxx */
 	{ PCI_VENDOR_ID_HXT, 0x0401, pci_quirk_qcom_rp_acs },
 	/* Intel PCH root ports */
-- 
2.34.1