[edk2-devel] [PATCH v1 1/1] DynamicTablesPkg: Fix serial port namespace path in DBG2

[Sunny Wang]

I tested this patch as well and confirmed this patch fixed the FWTS failure below. Thanks, Sami.
    - dbg2: DBG2 Device 'COM0' not found in ACPI object name space.

Tested-by: Sunny Wang <sunny.wang at arm.com>

-----Original Message-----
From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Jagadeesh Ujja via groups.io
Sent: 14 March 2022 05:01
To: devel at edk2.groups.io; Sami Mujawar <Sami.Mujawar at arm.com>
Cc: Alexei Fedorov <Alexei.Fedorov at arm.com>; Matteo Carlini <Matteo.Carlini at arm.com>; Akanksha Jain <Akanksha.Jain2 at arm.com>; Ben Adderson <Ben.Adderson at arm.com>; Pierre Gondois <Pierre.Gondois at arm.com>
Subject: Re: [edk2-devel] [PATCH v1 1/1] DynamicTablesPkg: Fix serial port namespace path in DBG2

Hi Sami,
The patch is tested and looks good to me:

Tested-by: Jagadeesh Ujja <Jagadeesh.Ujja at arm.com>

On Fri, Mar 11, 2022 at 6:38 PM PierreGondois <pierre.gondois at arm.com> wrote:
>
> Hi Sami,
> The patch looks good to me:
>
> Reviewed-by: Pierre Gondois <pierre.gondois at arm.com>
>
> On 3/10/22 18:39, Sami Mujawar wrote:
> > According to the Debug Port Table 2 (DBG2) specification,
> > February 17, 2021, the NamespaceString is a NULL terminated
> > ASCII string that consists of a fully qualified reference
> > to the object that represents the serial port device in the
> > ACPI namespace.
> >
> > The DBG2 table generator did not populate the full device
> > path for the serial port device, and this results in a FWTS
> > test failure.
> >
> > Therefore, populate the full namespace device path for the
> > serial port in DBG2 table.
> >
> > Signed-off-by: Sami Mujawar <sami.mujawar at arm.com>
> > ---
> > The changes can be seen at:
> > https://github.com/samimujawar/edk2/tree/2105_dbg2_generator_namestring_issue_v1
> >
> >   DynamicTablesPkg/Library/Acpi/Arm/AcpiDbg2LibArm/Dbg2Generator.c | 10 +++++++---
> >   1 file changed, 7 insertions(+), 3 deletions(-)
> >
> > diff --git a/DynamicTablesPkg/Library/Acpi/Arm/AcpiDbg2LibArm/Dbg2Generator.c b/DynamicTablesPkg/Library/Acpi/Arm/AcpiDbg2LibArm/Dbg2Generator.c
> > index 3d513dbd1fbe8c47d270a9e639b2797098201d91..f6dfb3d94c10980a0e7712ce9427648b69974061 100644
> > --- a/DynamicTablesPkg/Library/Acpi/Arm/AcpiDbg2LibArm/Dbg2Generator.c
> > +++ b/DynamicTablesPkg/Library/Acpi/Arm/AcpiDbg2LibArm/Dbg2Generator.c
> > @@ -1,7 +1,7 @@
> >   /** @file
> >     DBG2 Table Generator
> >
> > -  Copyright (c) 2017 - 2021, Arm Limited. All rights reserved.<BR>
> > +  Copyright (c) 2017 - 2022, Arm Limited. All rights reserved.<BR>
> >
> >     SPDX-License-Identifier: BSD-2-Clause-Patent
> >
> > @@ -55,13 +55,17 @@ Requirements:
> >   */
> >   #define NAME_STR_DBG_PORT0  "COM0"
> >
> > +/** A string representing the full path name of the debug port 0.
> > +*/
> > +#define NAMESPACE_STR_DBG_PORT0  "\\_SB_.COM0"
> > +
> >   /** An UID representing the debug port 0.
> >   */
> >   #define UID_DBG_PORT0  0
> >
> >   /** The length of the namespace string.
> >   */
> > -#define DBG2_NAMESPACESTRING_FIELD_SIZE  sizeof (NAME_STR_DBG_PORT0)
> > +#define DBG2_NAMESPACESTRING_FIELD_SIZE  sizeof (NAMESPACE_STR_DBG_PORT0)
> >
> >   /** The PL011 UART address range length.
> >   */
> > @@ -166,7 +170,7 @@ DBG2_TABLE  AcpiDbg2 = {
> >         0,                    // {Template}: Serial Port Subtype
> >         0,                    // {Template}: Serial Port Base Address
> >         PL011_UART_LENGTH,
> > -      NAME_STR_DBG_PORT0
> > +      NAMESPACE_STR_DBG_PORT0
> >         )
> >     }
> >   };
>
>
>
>
>





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