RK3288 USB触摸屏与USB摄像头同时使用时触摸卡顿

CPU：RK3288

系统：Android 5.1

当USB触摸屏与USB摄像头同时使用时，有时会出现触摸卡顿，看似按键按下没有弹起。

getevent 查看触摸屏上报，只有 DOWN，没有 UP，正常情况下是 DOWN 与 UP 成对出现。

出现此现象时，打下面补丁即可解决。

diff --git a/kernel/drivers/usb/dwc_otg_310/common_port/dwc_list.h b/kernel/drivers/usb/dwc_otg_310/common_port/dwc_list.h

index 46f1da3..62e00c5

--- a/kernel/drivers/usb/dwc_otg_310/common_port/dwc_list.h

+++ b/kernel/drivers/usb/dwc_otg_310/common_port/dwc_list.h

@@ -, +, @@ struct {                                                           \

        (head)->cqh_last = (elm);                                       \

 } while ()

+#define DWC_CIRCLEQ_INSERT_COM(head, listelm, elm, field, com) do {    \

+        DWC_CIRCLEQ_FOREACH(listelm, head, field) {        \

+            if ((elm)->com < (listelm)->com) {        \

+                DWC_CIRCLEQ_INSERT_BEFORE(head, listelm, elm, field); \

+                break;                    \

+            } else                        \

+                continue;                \

+        }                            \

+        if (DWC_CIRCLEQ_PREV(listelm, field) != elm)        \

+            DWC_CIRCLEQ_INSERT_TAIL(head, elm, field);    \

+} while ()

+

 #define DWC_CIRCLEQ_REMOVE(head, elm, field) do {                      \

        if ((elm)->field.cqe_next == DWC_CIRCLEQ_END(head))             \

                (head)->cqh_last = (elm)->field.cqe_prev;               \

diff --git a/kernel/drivers/usb/dwc_otg_310/dwc_otg_hcd_intr.c b/kernel/drivers/usb/dwc_otg_310/dwc_otg_hcd_intr.c

index 0e05b13..a1a067f

--- a/kernel/drivers/usb/dwc_otg_310/dwc_otg_hcd_intr.c

+++ b/kernel/drivers/usb/dwc_otg_310/dwc_otg_hcd_intr.c

@@ -, +, @@ static void release_channel(dwc_otg_hcd_t *hcd,

        dwc_otg_transaction_type_e tr_type;

        int free_qtd;

        int continue_trans = ;

+       dwc_hc_t *hc_tmp = NULL;

        DWC_DEBUGPL(DBG_HCDV, "  %s: channel %d, halt_status %d\n",

                    __func__, hc->hc_num, halt_status);

@@ -, +, @@ cleanup:

         * there's no need to clear the Channel Halted interrupt separately.

         */

        dwc_otg_hc_cleanup(hcd->core_if, hc);

-       DWC_CIRCLEQ_INSERT_TAIL(&hcd->free_hc_list, hc, hc_list_entry);

+       DWC_CIRCLEQ_INSERT_COM(&hcd->free_hc_list, hc_tmp, hc, hc_list_entry, hc_num);

        switch (hc->ep_type) {

        case DWC_OTG_EP_TYPE_CONTROL: