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Diffstat (limited to 'target/linux/apm821xx/patches-4.19/802-usb-xhci-force-msi-renesas-xhci.patch')
-rw-r--r--target/linux/apm821xx/patches-4.19/802-usb-xhci-force-msi-renesas-xhci.patch53
1 files changed, 53 insertions, 0 deletions
diff --git a/target/linux/apm821xx/patches-4.19/802-usb-xhci-force-msi-renesas-xhci.patch b/target/linux/apm821xx/patches-4.19/802-usb-xhci-force-msi-renesas-xhci.patch
new file mode 100644
index 0000000000..2fba6dcca1
--- /dev/null
+++ b/target/linux/apm821xx/patches-4.19/802-usb-xhci-force-msi-renesas-xhci.patch
@@ -0,0 +1,53 @@
+From a0dc613140bab907a3d5787a7ae7b0638bf674d0 Mon Sep 17 00:00:00 2001
+From: Christian Lamparter <chunkeey@gmail.com>
+Date: Thu, 23 Jun 2016 20:28:20 +0200
+Subject: [PATCH] usb: xhci: force MSI for uPD720201 and
+ uPD720202
+
+The APM82181 does not support MSI-X. When probed, it will
+produce a noisy warning.
+
+---
+ drivers/usb/host/pci-quirks.c | 362 ++++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 362 insertions(+)
+
+--- a/drivers/usb/host/xhci-pci.c
++++ b/drivers/usb/host/xhci-pci.c
+@@ -206,6 +206,7 @@ static void xhci_pci_quirks(struct devic
+ pdev->device == 0x0015) {
+ xhci->quirks |= XHCI_RESET_ON_RESUME;
+ xhci->quirks |= XHCI_ZERO_64B_REGS;
++ xhci->quirks |= XHCI_FORCE_MSI;
+ }
+ if (pdev->vendor == PCI_VENDOR_ID_VIA)
+ xhci->quirks |= XHCI_RESET_ON_RESUME;
+--- a/drivers/usb/host/xhci.c
++++ b/drivers/usb/host/xhci.c
+@@ -424,10 +424,14 @@ static int xhci_try_enable_msi(struct us
+ free_irq(hcd->irq, hcd);
+ hcd->irq = 0;
+
+- ret = xhci_setup_msix(xhci);
+- if (ret)
+- /* fall back to msi*/
++ if (xhci->quirks & XHCI_FORCE_MSI) {
+ ret = xhci_setup_msi(xhci);
++ } else {
++ ret = xhci_setup_msix(xhci);
++ if (ret)
++ /* fall back to msi*/
++ ret = xhci_setup_msi(xhci);
++ }
+
+ if (!ret) {
+ hcd->msi_enabled = 1;
+--- a/drivers/usb/host/xhci.h
++++ b/drivers/usb/host/xhci.h
+@@ -1857,6 +1857,7 @@ struct xhci_hcd {
+ /* support xHCI 0.96 spec USB2 software LPM */
+ unsigned sw_lpm_support:1;
+ /* support xHCI 1.0 spec USB2 hardware LPM */
++#define XHCI_FORCE_MSI (1 << 24)
+ unsigned hw_lpm_support:1;
+ /* cached usb2 extened protocol capabilites */
+ u32 *ext_caps;