diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0661-xhci-implement-xhci_fixup_endpoint-for-interval-adju.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0661-xhci-implement-xhci_fixup_endpoint-for-interval-adju.patch | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0661-xhci-implement-xhci_fixup_endpoint-for-interval-adju.patch b/target/linux/brcm2708/patches-4.19/950-0661-xhci-implement-xhci_fixup_endpoint-for-interval-adju.patch new file mode 100644 index 0000000000..6b3e4e1619 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0661-xhci-implement-xhci_fixup_endpoint-for-interval-adju.patch @@ -0,0 +1,129 @@ +From ef57358754e9ab16429739d0ea1e479967ad4a40 Mon Sep 17 00:00:00 2001 +From: Jonathan Bell <jonathan@raspberrypi.org> +Date: Tue, 11 Jun 2019 11:33:39 +0100 +Subject: [PATCH 661/703] xhci: implement xhci_fixup_endpoint for interval + adjustments + +Must be called in a non-atomic context, after the endpoint +has been registered with the hardware via xhci_add_endpoint +and before the first URB is submitted for the endpoint. + +Signed-off-by: Jonathan Bell <jonathan@raspberrypi.org> +--- + drivers/usb/host/xhci.c | 98 +++++++++++++++++++++++++++++++++++++++++ + 1 file changed, 98 insertions(+) + +--- a/drivers/usb/host/xhci.c ++++ b/drivers/usb/host/xhci.c +@@ -1416,6 +1416,103 @@ 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 ++ * XXX: bandwidth is not recalculated. We should probably do that. ++ */ ++static void xhci_fixup_endpoint(struct usb_hcd *hcd, struct usb_device *udev, ++ struct usb_host_endpoint *ep, int interval) ++{ ++ struct xhci_hcd *xhci; ++ 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; ++ int ret; ++ int ep_index; ++ unsigned long flags; ++ u32 ep_info_tmp; ++ ++ xhci = hcd_to_xhci(hcd); ++ ep_index = xhci_get_endpoint_index(&ep->desc); ++ ++ /* FS/LS interval translations */ ++ if ((udev->speed == USB_SPEED_FULL || ++ udev->speed == USB_SPEED_LOW)) ++ interval *= 8; ++ ++ mutex_lock(&xhci->mutex); ++ ++ spin_lock_irqsave(&xhci->lock, flags); ++ ++ vdev = xhci->devs[udev->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)); ++ ++ if (interval == xhci_interval) { ++ spin_unlock_irqrestore(&xhci->lock, flags); ++ mutex_unlock(&xhci->mutex); ++ return; ++ } ++ ++ xhci_dbg(xhci, "Fixup interval=%d xhci_interval=%d\n", ++ 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); ++ mutex_unlock(&xhci->mutex); ++ return; ++ } ++ ++ /* xHCI uses exponents for intervals... */ ++ xhci_interval = fls(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); ++ mutex_unlock(&xhci->mutex); ++ 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, udev, command, ++ false, false); ++ if (ret) ++ xhci_warn(xhci, "%s: Configure endpoint failed: %d\n", ++ __func__, ret); ++ xhci_free_command(xhci, command); ++ mutex_unlock(&xhci->mutex); ++} ++ ++/* + * non-error returns are a promise to giveback() the urb later + * we drop ownership so next owner (or urb unlink) can get it + */ +@@ -5180,6 +5277,7 @@ static const struct hc_driver xhci_hc_dr + .endpoint_reset = xhci_endpoint_reset, + .check_bandwidth = xhci_check_bandwidth, + .reset_bandwidth = xhci_reset_bandwidth, ++ .fixup_endpoint = xhci_fixup_endpoint, + .address_device = xhci_address_device, + .enable_device = xhci_enable_device, + .update_hub_device = xhci_update_hub_device, |