diff mbox series

[v6,1/3] usb: xhci: Set quirk for XHCI_SG_TRB_CACHE_SIZE_QUIRK

Message ID 20e54d9301d9ff5f8485f5da381605d5d00640bc.1606149078.git.joglekar@synopsys.com
State New
Headers show
Series Add logic to consolidate TRBs for Synopsys xHC | expand

Commit Message

Tejas Joglekar Nov. 23, 2020, 4:38 p.m. UTC 
This commit uses the private data passed by parent device
to set the quirk for Synopsys xHC. This patch fixes the
SNPS xHC hang issue when the data is scattered across
small buffers which does not make atleast MPS size for
given TRB cache size of SNPS xHC.

Signed-off-by: Tejas Joglekar <joglekar@synopsys.com>
---
 drivers/usb/host/xhci-plat.c | 3 +++
 drivers/usb/host/xhci.h      | 1 +
 2 files changed, 4 insertions(+)
diff mbox series

Patch

diff --git a/drivers/usb/host/xhci-plat.c b/drivers/usb/host/xhci-plat.c
index aa2d35f98200..4d34f6005381 100644
--- a/drivers/usb/host/xhci-plat.c
+++ b/drivers/usb/host/xhci-plat.c
@@ -333,6 +333,9 @@  static int xhci_plat_probe(struct platform_device *pdev)
 	if (priv && (priv->quirks & XHCI_SKIP_PHY_INIT))
 		hcd->skip_phy_initialization = 1;
 
+	if (priv && (priv->quirks & XHCI_SG_TRB_CACHE_SIZE_QUIRK))
+		xhci->quirks |= XHCI_SG_TRB_CACHE_SIZE_QUIRK;
+
 	ret = usb_add_hcd(hcd, irq, IRQF_SHARED);
 	if (ret)
 		goto disable_usb_phy;
diff --git a/drivers/usb/host/xhci.h b/drivers/usb/host/xhci.h
index ebb359ebb261..d90c0d5df3b3 100644
--- a/drivers/usb/host/xhci.h
+++ b/drivers/usb/host/xhci.h
@@ -1878,6 +1878,7 @@  struct xhci_hcd {
 #define XHCI_RENESAS_FW_QUIRK	BIT_ULL(36)
 #define XHCI_SKIP_PHY_INIT	BIT_ULL(37)
 #define XHCI_DISABLE_SPARSE	BIT_ULL(38)
+#define XHCI_SG_TRB_CACHE_SIZE_QUIRK	BIT_ULL(39)
 
 	unsigned int		num_active_eps;
 	unsigned int		limit_active_eps;