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usb: dwc3: support option to disable usb3 host autosuspend

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Some xHCI controllers (e.g. Rockchip rk3328 SoC) integrated
in DWC3 IP, don't support USB 3.0 autosuspend well, so we
need to disable USB 3.0 HUB autosuspend function with a quirk.

Change-Id: I33d4d2ec86102653bfb043eed12bfb6b5b426823
Signed-off-by: William Wu <william.wu@rock-chips.com>
This commit is contained in:
William Wu
2019-11-04 11:19:06 +08:00
parent fbc2bf3242
commit 1b69499a30
3 changed files with 7 additions and 1 deletions
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2
drivers/usb/dwc3/core.c
View File

@@ -1296,6 +1296,8 @@ static void dwc3_get_properties(struct dwc3 *dwc)
"snps,xhci-slow-suspend-quirk");
dwc->xhci_trb_ent_quirk = device_property_read_bool(dev,
"snps,xhci-trb-ent-quirk");
dwc->dis_u3_autosuspend_quirk = device_property_read_bool(dev,
"snps,dis-u3-autosuspend-quirk");
dwc->tx_de_emphasis_quirk = device_property_read_bool(dev,
"snps,tx_de_emphasis_quirk");

2
drivers/usb/dwc3/core.h
View File

@@ -1029,6 +1029,7 @@ struct dwc3_scratchpad_array {
* @xhci_trb_ent_quirk: set if need to enable the Evaluate Next TRB(ENT)
flag in the TRB data structure to force xHC to
pre-fetch the next TRB of a TD.
* @dis_u3_autosuspend_quirk: set if the we want to disable usb3 autosuspend
* @tx_de_emphasis_quirk: set if we enable Tx de-emphasis quirk
* @tx_de_emphasis: Tx de-emphasis value
* 0 - -6dB de-emphasis
@@ -1219,6 +1220,7 @@ struct dwc3 {
unsigned dis_tx_ipgap_linecheck_quirk:1;
unsigned xhci_slow_suspend_quirk:1;
unsigned xhci_trb_ent_quirk:1;
unsigned dis_u3_autosuspend_quirk:1;
unsigned tx_de_emphasis_quirk:1;
unsigned tx_de_emphasis:2;

4
drivers/usb/dwc3/host.c
View File

@@ -46,7 +46,7 @@ out:
int dwc3_host_init(struct dwc3 *dwc)
{
struct property_entry props[5];
struct property_entry props[6];
struct platform_device *xhci;
int ret, irq;
struct resource *res;
@@ -102,6 +102,8 @@ int dwc3_host_init(struct dwc3 *dwc)
if (dwc->usb2_lpm_disable)
props[prop_idx++].name = "usb2-lpm-disable";
if (dwc->dis_u3_autosuspend_quirk)
props[prop_idx++].name = "usb3-dis-autosuspend";
/**
* WORKAROUND: dwc3 revisions <=3.00a have a limitation
* where Port Disable command doesn't work.