[edk2-devel] [PATCH] bRefClkFreq UFS card attribute need to be programmed after fDeviceInit

[Wu, Hao A]

Will slightly modify the subject to:
MdeModulePkg/Ufs: bRefClkFreq attribute be programmed after fDeviceInit

Reviewed-by: Hao A Wu <hao.a.wu at intel.com>
Will wait a day before merging to see if comment from other reviewers.

Best Regards,
Hao Wu

> -----Original Message-----
> From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Bandaru,
> Purna Chandra Rao
> Sent: Friday, March 25, 2022 8:18 PM
> To: devel at edk2.groups.io
> Cc: Bandaru, Purna Chandra Rao <purna.chandra.rao.bandaru at intel.com>; Wu,
> Hao A <hao.a.wu at intel.com>; Albecki, Mateusz <mateusz.albecki at intel.com>;
> Gao, Liming <gaoliming at byosoft.com.cn>; Liu, Zhiguang
> <zhiguang.liu at intel.com>
> Subject: [edk2-devel] [PATCH] bRefClkFreq UFS card attribute need to be
> programmed after fDeviceInit
> 
> REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3886
> 
> bRefClkFreq UFS card attribute need to be read and written after successful
> fDeviceInit and NOP response so that link will be stable.
> 
> Cc: Wu Hao A <hao.a.wu at intel.com>
> Cc: Albecki Mateusz <mateusz.albecki at intel.com>
> Cc: Liming Gao <gaoliming at byosoft.com.cn>
> Cc: Zhiguang Liu <zhiguang.liu at intel.com>
> 
> Signed-off-by: Purna Chandra Rao Bandaru
> <purna.chandra.rao.bandaru at intel.com>
> ---
>  .../Bus/Ufs/UfsPassThruDxe/UfsPassThru.c      | 34 +++++++++----------
>  1 file changed, 17 insertions(+), 17 deletions(-)
> 
> diff --git a/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThru.c
> b/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThru.c
> index dc78e09678..ae593ff03a 100644
> --- a/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThru.c
> +++ b/MdeModulePkg/Bus/Ufs/UfsPassThruDxe/UfsPassThru.c
> @@ -919,6 +919,23 @@ UfsPassThruDriverBindingStart (
>      goto Error;
>    }
> 
> +  //
> +  // UFS 2.0 spec Section 13.1.3.3:
> +  // At the end of the UFS Interconnect Layer initialization on both
> + host and device side,  // the host shall send a NOP OUT UPIU to verify that the
> device UTP Layer is ready.
> +  //
> +  Status = UfsExecNopCmds (Private);
> +  if (EFI_ERROR (Status)) {
> +    DEBUG ((DEBUG_ERROR, "Ufs Sending NOP IN command Error, Status
> = %r\n", Status));
> +    goto Error;
> +  }
> +
> +  Status = UfsFinishDeviceInitialization (Private);  if (EFI_ERROR
> + (Status)) {
> +    DEBUG ((DEBUG_ERROR, "Device failed to finish initialization, Status = %r\n",
> Status));
> +    goto Error;
> +  }
> +
>    if ((mUfsHcPlatform != NULL) &&
>        ((mUfsHcPlatform->RefClkFreq == EdkiiUfsCardRefClkFreq19p2Mhz) ||
>         (mUfsHcPlatform->RefClkFreq == EdkiiUfsCardRefClkFreq26Mhz) || @@ -
> 967,23 +984,6 @@ UfsPassThruDriverBindingStart (
>      }
>    }
> 
> -  //
> -  // UFS 2.0 spec Section 13.1.3.3:
> -  // At the end of the UFS Interconnect Layer initialization on both host and
> device side,
> -  // the host shall send a NOP OUT UPIU to verify that the device UTP Layer is
> ready.
> -  //
> -  Status = UfsExecNopCmds (Private);
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((DEBUG_ERROR, "Ufs Sending NOP IN command Error, Status
> = %r\n", Status));
> -    goto Error;
> -  }
> -
> -  Status = UfsFinishDeviceInitialization (Private);
> -  if (EFI_ERROR (Status)) {
> -    DEBUG ((DEBUG_ERROR, "Device failed to finish initialization, Status = %r\n",
> Status));
> -    goto Error;
> -  }
> -
>    //
>    // Check if 8 common luns are active and set corresponding bit mask.
>    //
> --
> 2.31.1.windows.1
> 
> 
> 
> 
> 



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