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Date: Tue, 07 May 2024 10:00:33 -0600
From: Lyndon Sanche <lsanche@lyndeno.ca>
Subject: Re: [PATCH v5] platform/x86: dell-laptop: Implement platform_profile
To: Hans de Goede <hdegoede@redhat.com>
Cc: kernel test robot <lkp@intel.com>, Paul Gazzillo <paul@pgazz.com>,
	Necip Fazil Yildiran <fazilyildiran@gmail.com>, oe-kbuild-all@lists.linux.dev,
	mario.limonciello@amd.com, pali@kernel.org, W_Armin@gmx.de,
	srinivas.pandruvada@linux.intel.com, ilpo.jarvinen@linux.intel.com,
	Matthew Garrett <mjg59@srcf.ucam.org>, Jonathan Corbet <corbet@lwn.net>,
	Heiner Kallweit <hkallweit1@gmail.com>, Vegard Nossum
	<vegard.nossum@oracle.com>, platform-driver-x86@vger.kernel.org,
	linux-kernel@vger.kernel.org, Dell.Client.Kernel@dell.com
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	<202405031851.NYy0ZB02-lkp@intel.com> <A9SXCS.IUN31UTTT9GM2@lyndeno.ca>
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On Mon, May 6 2024 at 12:18:05 PM +02:00:00, Hans de Goede 
<hdegoede@redhat.com> wrote:
> Hi Lyndon,
> 
> Thank you for your patch!
> 
> On 5/4/24 3:03 AM, Lyndon Sanche wrote:
>> 
>> 
>>  On Fri, May 3 2024 at 06:19:18 PM +08:00:00, kernel test robot 
>> <lkp@intel.com> wrote:
>>>  Hi Lyndon,
>>> 
>>>  kernel test robot noticed the following build warnings:
>>> 
>>>  [auto build test WARNING on linus/master]
>>>  [also build test WARNING on v6.9-rc6 next-20240503]
>>>  [If your patch is applied to the wrong git tree, kindly drop us a 
>>> note.
>>>  And when submitting patch, we suggest to use '--base' as 
>>> documented in
>>>  https://git-scm.com/docs/git-format-patch#_base_tree_information]
>>> 
>>>  url:    
>>> https://github.com/intel-lab-lkp/linux/commits/Lyndon-Sanche/platform-x86-dell-laptop-Implement-platform_profile/20240502-060146
>>>  base:   linus/master
>>>  patch link:    
>>> https://lore.kernel.org/r/20240501215829.4991-2-lsanche%40lyndeno.ca
>>>  patch subject: [PATCH v5] platform/x86: dell-laptop: Implement 
>>> platform_profile
>>>  config: 
>>> i386-kismet-CONFIG_ACPI_PLATFORM_PROFILE-CONFIG_DELL_LAPTOP-0-0 
>>> (https://download.01.org/0day-ci/archive/20240503/202405031851.NYy0ZB02-lkp@intel.com/config)
>>>  reproduce: 
>>> (https://download.01.org/0day-ci/archive/20240503/202405031851.NYy0ZB02-lkp@intel.com/reproduce)
>>> 
>>>  If you fix the issue in a separate patch/commit (i.e. not just a 
>>> new version of
>>>  the same patch/commit), kindly add following tags
>>>  | Reported-by: kernel test robot <lkp@intel.com>
>>>  | Closes: 
>>> https://lore.kernel.org/oe-kbuild-all/202405031851.NYy0ZB02-lkp@intel.com/
>>> 
>>>  kismet warnings: (new ones prefixed by >>)
>>>>>   kismet: WARNING: unmet direct dependencies detected for 
>>>>> ACPI_PLATFORM_PROFILE when selected by DELL_LAPTOP
>>>     WARNING: unmet direct dependencies detected for 
>>> ACPI_PLATFORM_PROFILE
>>>       Depends on [n]: ACPI [=n]
>>>       Selected by [y]:
>>>       - DELL_LAPTOP [=y] && X86_PLATFORM_DEVICES [=y] && 
>>> X86_PLATFORM_DRIVERS_DELL [=y] && DMI [=y] && 
>>> BACKLIGHT_CLASS_DEVICE [=y] && (ACPI_VIDEO [=n] || ACPI_VIDEO 
>>> [=n]=n) && (RFKILL [=n] || RFKILL [=n]=n) && (DELL_WMI [=n] || 
>>> DELL_WMI [=n]=n) && SERIO_I8042 [=y] && DELL_SMBIOS [=y]
>>> 
>>>  --
>>>  0-DAY CI Kernel Test Service
>>>  https://github.com/intel/lkp-tests/wiki
>> 
>>  I will try reproducing this test on my machine, to avoid spamming 
>> the mailing list with the same error over and over.
> 
> No need to reproduce this. When you select something in Kconfig you 
> must ensure
> that the item doing the selecting depends on all the dependencies of 
> what you
> are selecting.
> 
> IOW if you add this change to your next version then that should fix 
> this:
> 
> diff --git a/drivers/platform/x86/dell/Kconfig 
> b/drivers/platform/x86/dell/Kconfig
> index bd9f445974cc..d18fbc6a5fbf 100644
> --- a/drivers/platform/x86/dell/Kconfig
> +++ b/drivers/platform/x86/dell/Kconfig
> @@ -47,6 +47,7 @@ config DCDBAS
>  config DELL_LAPTOP
>  	tristate "Dell Laptop Extras"
>  	default m
> +	depends on ACPI
>  	depends on DMI
>  	depends on BACKLIGHT_CLASS_DEVICE
>  	depends on ACPI_VIDEO || ACPI_VIDEO = n
> 
> And please also address Armin's remark about making sure that failure
> to initialize platform_profile support should not cause the entire 
> driver
> to fail to probe.
> 
> I see that Armin suggests to check da_supported_commands for this,
> this is a good idea but atm this is private to dell-smbios-base. So
> you will first need to do a small preparation patch adding a small:
> 
> bool dell_laptop_check_supported_cmds(struct calling_interface_buffer 
> *buffer)
> {
> 	return da_supported_commands & (1 << buffer->cmd_class);
> }
> EXPORT_SYMBOL_GPL(dell_laptop_check_supported_cmds):
> 
> helper for this.
> 
> If this check fails (returns false) make the code not register
> the platform_profile() while allowing probe() to continue / succeed,
> please do not log anything in this case (or use dev_dbg())
> 
> If this check succeeds but subsequent dell_smbios_call()'s
> fail during probe, then it is ok to log an error but please
> still let probe() continue / succeed (without registering
> a platform_profile handler).
> 
> Regards,
> 
> Hans
> 
> 
Hello Hans:

Thank you very much for your feedback and suggestions! I have been busy 
the past few days, but will be able to tackle this this week. These are 
good ideas which I plan to implement.

Thank you,

Lyndon