linux-kernel - [PATCH] usb: xhci: tegra: enable stream protocol support

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Message-ID: <20230512080423.27978-1-jilin@nvidia.com>
Date:   Fri, 12 May 2023 16:04:23 +0800
From:   Jim Lin <jilin@...dia.com>
To:     <gregkh@...uxfoundation.org>
CC:     <mathias.nyman@...el.com>, <thierry.reding@...il.com>,
        <jonathanh@...dia.com>, <linux-usb@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        Henry Lin <henryl@...dia.com>, Jim Lin <jilin@...dia.com>
Subject: [PATCH] usb: xhci: tegra: enable stream protocol support

From: Henry Lin <henryl@...dia.com>

This commit enables stream transfer protocol for Tegra XHCI.

Signed-off-by: Henry Lin <henryl@...dia.com>
Signed-off-by: Jim Lin <jilin@...dia.com>
---

 drivers/usb/host/xhci-tegra.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/usb/host/xhci-tegra.c b/drivers/usb/host/xhci-tegra.c
index c75d93244143..ea55e401c70e 100644
--- a/drivers/usb/host/xhci-tegra.c
+++ b/drivers/usb/host/xhci-tegra.c
@@ -1828,6 +1828,9 @@ static int tegra_xusb_probe(struct platform_device *pdev)
 		goto remove_usb2;
 	}
 
+	if (HCC_MAX_PSA(xhci->hcc_params) >= 4)
+		xhci->shared_hcd->can_do_streams = 1;
+
 	err = usb_add_hcd(xhci->shared_hcd, tegra->xhci_irq, IRQF_SHARED);
 	if (err < 0) {
 		dev_err(&pdev->dev, "failed to add shared HCD: %d\n", err);
-- 
2.17.1