Reviewed-by: Liming Gao <gaolim...@byosoft.com.cn> > -----邮件原件----- > 发件人: Xianglei Cai <xianglei....@intel.com> > 发送时间: 2024年4月15日 14:34 > 收件人: devel@edk2.groups.io > 抄送: Xianglei Cai <xianglei....@intel.com>; Ray Ni <ray...@intel.com>; > Liming Gao <gaolim...@byosoft.com.cn>; Krzysztof Lewandowski > <krzysztof.lewandow...@intel.com>; Jenny Huang <jenny.hu...@intel.com>; > More Shih <more.s...@intel.com>; Ian Chiu <ian.c...@intel.com> > 主题: [PATCH V3 1/1] MdeModulePkg/XhciDxe: Add PCD for the delay of > HCRST > > https://bugzilla.tianocore.org/show_bug.cgi?id=4727 > > Recently some of XHCI host controllers require to have > extra 1ms delay before accessing any MMIO register > during reset. PHY transition from P3 to P0 can take > around 1.3ms and the xHCI reset can take around 1.5ms. > Add PCD to control the delay, the default is 2 ms. > > Cc: Ray Ni <ray...@intel.com> > Cc: Liming Gao <gaolim...@byosoft.com.cn> > Cc: Krzysztof Lewandowski <krzysztof.lewandow...@intel.com> > Cc: Jenny Huang <jenny.hu...@intel.com> > Cc: More Shih <more.s...@intel.com> > Cc: Ian Chiu <ian.c...@intel.com> > Signed-off-by: Xianglei Cai <xianglei....@intel.com> > Reviewed-by: Krzysztof Lewandowski <krzysztof.lewandow...@intel.com> > --- > MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h | 1 + > MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf | 4 ++++ > MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c | 2 +- > MdeModulePkg/MdeModulePkg.dec | 5 +++++ > 4 files changed, 11 insertions(+), 1 deletion(-) > > diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h > b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h > index 44016758724c..c9a12095c29e 100644 > --- a/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h > +++ b/MdeModulePkg/Bus/Pci/XhciDxe/Xhci.h > @@ -28,6 +28,7 @@ SPDX-License-Identifier: BSD-2-Clause-Patent > #include <Library/DebugLib.h> > #include <Library/ReportStatusCodeLib.h> > #include <Library/TimerLib.h> > +#include <Library/PcdLib.h> > > #include <IndustryStandard/Pci.h> > > diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf > b/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf > index 18ef87916ae4..e6c1ac8a6346 100644 > --- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf > +++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciDxe.inf > @@ -56,6 +56,7 @@ > DebugLib > ReportStatusCodeLib > TimerLib > + PcdLib > > [Guids] > gEfiEventExitBootServicesGuid ## > SOMETIMES_CONSUMES ## Event > @@ -64,6 +65,9 @@ > gEfiPciIoProtocolGuid ## TO_START > gEfiUsb2HcProtocolGuid ## BY_START > > +[Pcd] > + gEfiMdeModulePkgTokenSpaceGuid.PcdDelayXhciHCReset ## > CONSUMES > + > # [Event] > # EVENT_TYPE_PERIODIC_TIMER ## CONSUMES > # > diff --git a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c > b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c > index 40f2f1f22766..525942a167b0 100644 > --- a/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c > +++ b/MdeModulePkg/Bus/Pci/XhciDxe/XhciReg.c > @@ -864,7 +864,7 @@ XhcResetHC ( > // Otherwise there may have the timeout case happened. > // The below is a workaround to solve such problem. > // > - gBS->Stall (XHC_1_MILLISECOND); > + gBS->Stall (PcdGet16 (PcdDelayXhciHCReset)); > Status = XhcWaitOpRegBit (Xhc, XHC_USBCMD_OFFSET, > XHC_USBCMD_RESET, FALSE, Timeout); > > if (!EFI_ERROR (Status)) { > diff --git a/MdeModulePkg/MdeModulePkg.dec > b/MdeModulePkg/MdeModulePkg.dec > index a91058e5b5df..d9e2e724df9e 100644 > --- a/MdeModulePkg/MdeModulePkg.dec > +++ b/MdeModulePkg/MdeModulePkg.dec > @@ -1148,6 +1148,11 @@ > # @Prompt Enable large address image loading. > > gEfiMdeModulePkgTokenSpaceGuid.PcdImageLargeAddressLoad|TRUE|BOO > LEAN|0x30001059 > > + ## Indicates time delay for XHCI registers access after it issues HCRST. > + # Default is 2000, it represent delay is 2 ms. > + # @Prompt Delay access XHCI register after it issues HCRST (us) > + > gEfiMdeModulePkgTokenSpaceGuid.PcdDelayXhciHCReset|2000|UINT16|0x3 > 0001060 > + > [PcdsFixedAtBuild, PcdsPatchableInModule] > ## Dynamic type PCD can be registered callback function for Pcd setting > action. > # PcdMaxPeiPcdCallBackNumberPerPcdEntry indicates the maximum > number of callback function > -- > 2.42.0.windows.2
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