brcm2708: update to latest patches from the RPi foundation

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 122 insertions, 0 deletions

diff --git a/target/linux/brcm2708/patches-4.19/950-0551-usb-xhci-hack-xhci_urb_enqueue-to-support-hid.mousep.patch b/target/linux/brcm2708/patches-4.19/950-0551-usb-xhci-hack-xhci_urb_enqueue-to-support-hid.mousep.patch
new file mode 100644
index 0000000000..a8056287a7
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0551-usb-xhci-hack-xhci_urb_enqueue-to-support-hid.mousep.patch
@@ -0,0 +1,122 @@
+From ebd33389465183268879eb8c3eefe9e7e5363cf3 Mon Sep 17 00:00:00 2001
+From: Jonathan Bell <jonathan@raspberrypi.org>
+Date: Thu, 30 May 2019 10:38:40 +0100
+Subject: [PATCH 551/725] usb: xhci: hack xhci_urb_enqueue to support
+ hid.mousepoll behaviour
+
+xHCI creates endpoint contexts directly from the device's endpoint
+data, so submitting URBs with urb->interval different from the hardware
+interval has no effect.
+
+Add an explicit reconfiguration of the endpoint context when requested,
+which will happen only when the interval is different from the cached
+value. In practice, the reconfiguration only happens on the first URB
+submitted for the endpoint.
+
+Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org>
+---
+ drivers/usb/host/xhci.c | 86 +++++++++++++++++++++++++++++++++++++++++
+ 1 file changed, 86 insertions(+)
+
+--- a/drivers/usb/host/xhci.c
++++ b/drivers/usb/host/xhci.c
+@@ -1416,6 +1416,87 @@ command_cleanup:
+ }
+ 
+ /*
++ * RPI: Fixup endpoint intervals when requested
++ * - Check interval versus the (cached) endpoint context
++ * - set the endpoint interval to the new value
++ * - force an endpoint configure command
++ */
++static void xhci_fixup_interval(struct xhci_hcd *xhci, struct urb *urb,
++				unsigned int slot_id, unsigned int ep_index)
++{
++	struct xhci_ep_ctx *ep_ctx_out, *ep_ctx_in;
++	struct xhci_command *command;
++	struct xhci_input_control_ctx *ctrl_ctx;
++	struct xhci_virt_device *vdev;
++	int xhci_interval, ep_interval;
++	int ret;
++	unsigned long flags;
++	u32 ep_info_tmp;
++
++	spin_lock_irqsave(&xhci->lock, flags);
++
++	vdev = xhci->devs[slot_id];
++	/* Get context-derived endpoint interval */
++	ep_ctx_out = xhci_get_ep_ctx(xhci, vdev->out_ctx, ep_index);
++	ep_ctx_in = xhci_get_ep_ctx(xhci, vdev->in_ctx, ep_index);
++	xhci_interval = EP_INTERVAL_TO_UFRAMES(le32_to_cpu(ep_ctx_out->ep_info));
++	ep_interval = urb->interval * 8;
++
++	if (ep_interval == xhci_interval) {
++		spin_unlock_irqrestore(&xhci->lock, flags);
++		return;
++	}
++
++	xhci_dbg(xhci, "Fixup interval ep_interval=%d xhci_interval=%d\n",
++		 ep_interval, xhci_interval);
++	command = xhci_alloc_command_with_ctx(xhci, true, GFP_ATOMIC);
++	if (!command) {
++		/* Failure here is benign, poll at the original rate */
++		spin_unlock_irqrestore(&xhci->lock, flags);
++		return;
++	}
++
++	/* xHCI uses exponents for intervals... */
++	xhci_interval = fls(ep_interval) - 1;
++	xhci_interval = clamp_val(xhci_interval, 3, 10);
++	ep_info_tmp = le32_to_cpu(ep_ctx_out->ep_info);
++	ep_info_tmp &= ~EP_INTERVAL(255);
++	ep_info_tmp |= EP_INTERVAL(xhci_interval);
++
++	/* Keep the endpoint context up-to-date while issuing the command. */
++	xhci_endpoint_copy(xhci, vdev->in_ctx,
++			   vdev->out_ctx, ep_index);
++	ep_ctx_in->ep_info = cpu_to_le32(ep_info_tmp);
++
++	/*
++	 * We need to drop the lock, so take an explicit copy
++	 * of the ep context.
++	 */
++	xhci_endpoint_copy(xhci, command->in_ctx, vdev->in_ctx, ep_index);
++
++	ctrl_ctx = xhci_get_input_control_ctx(command->in_ctx);
++	if (!ctrl_ctx) {
++		xhci_warn(xhci,
++			  "%s: Could not get input context, bad type.\n",
++			  __func__);
++		spin_unlock_irqrestore(&xhci->lock, flags);
++		xhci_free_command(xhci, command);
++		return;
++	}
++	ctrl_ctx->add_flags = xhci_get_endpoint_flag_from_index(ep_index);
++	ctrl_ctx->drop_flags = 0;
++
++	spin_unlock_irqrestore(&xhci->lock, flags);
++
++	ret = xhci_configure_endpoint(xhci, urb->dev, command,
++				      false, false);
++	if (ret)
++		xhci_warn(xhci, "%s: Configure endpoint failed: %d\n",
++			  __func__, ret);
++	xhci_free_command(xhci, command);
++}
++
++/*
+  * non-error returns are a promise to giveback() the urb later
+  * we drop ownership so next owner (or urb unlink) can get it
+  */
+@@ -1483,6 +1564,11 @@ static int xhci_urb_enqueue(struct usb_h
+ 		}
+ 	}
+ 
++	if (usb_endpoint_xfer_int(&urb->ep->desc) &&
++	    (urb->dev->speed == USB_SPEED_FULL ||
++	     urb->dev->speed == USB_SPEED_LOW))
++		xhci_fixup_interval(xhci, urb, slot_id, ep_index);
++
+ 	spin_lock_irqsave(&xhci->lock, flags);
+ 
+ 	if (xhci->xhc_state & XHCI_STATE_DYING) {