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SubjectRe: [PATCH v3 2/3] x86/platform/dell-privacy-wmi: add document for dell privacy driver
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Hi Mario,
Thanks for your review.
On 2021/1/13 1:54, Limonciello, Mario wrote:
>> -----Original Message-----
>> From: Yuan, Perry <Perry_Yuan@Dell.com>
>> Sent: Tuesday, January 12, 2021 11:18
>> To: oder_chiou@realtek.com; perex@perex.cz; tiwai@suse.com;
>> hdegoede@redhat.com; mgross@linux.intel.com
>> Cc: lgirdwood@gmail.com; broonie@kernel.org; alsa-devel@alsa-project.org;
>> linux-kernel@vger.kernel.org; platform-driver-x86@vger.kernel.org; Yuan,
>> Perry; Limonciello, Mario
>> Subject: [PATCH v3 2/3] x86/platform/dell-privacy-wmi: add document for dell
>> privacy driver
>>
>> From: Perry Yuan <perry_yuan@dell.com>
>>
>> Describe the Dell Privacy feature capabilities and devices
>> state class exposed by BIOS
>>
>> Signed-off-by: Perry Yuan <perry_yuan@dell.com>
>> ---
>> .../testing/sysfs-platform-dell-privacy-wmi | 31 +++++++++++++++++++
>> 1 file changed, 31 insertions(+)
>> create mode 100644 Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi
>
> I don't see a reason that the documentation needs to come in it's own commit.
> In v4, I would think this can collapse as part of:
> "Add support for Dell hardware privacy"
>
Agreed. will merge this patch content to "Add support for Dell hardware
privacy"
>>
>> diff --git a/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi
>> b/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi
>> new file mode 100644
>> index 000000000000..3dbc2d25b60e
>> --- /dev/null
>> +++ b/Documentation/ABI/testing/sysfs-platform-dell-privacy-wmi
>> @@ -0,0 +1,31 @@
>> +What: /sys/bus/wmi/devices/6932965F-1671-4CEB-B988-
>> D3AB0A901919/devices_supported
>> +Date: Jan 2021
>> +KernelVersion: 5.11
> I think this is 5.12 material now.
> Need to update this to approximate 5.12 date.
>
>> +Contact: "perry_yuan@dell.com>"
>
> I think Dell addresses publicly use a period rather than an underscore, no?
> So shouldn't this be perry.yuan@dell.com? (Although I acknowledge it's an
> alias, I don't trust that I/T wouldn't remove that some day).
>
changed using period for the mail address.
>> +Description:
>> + Display which dell hardware level privacy devices are supported
>> + “Dell Privacy” is a set of HW, FW, and SW features to enhance
>> + Dell’s commitment to platform privacy for MIC, Camera, and
>> + ePrivacy screens.
>> + The supported privacy haredware privacy devices are:
>
> You have a typo here.
will fix this in V4.
>
>> + * 0x0 - None,
>> + * 0x1 - Microphone,
>> + * 0x2 - Camera,
>> + * 0x4 - ePrivacy Screen
>
> So this is an bitmap encoded in the integer? I think that needs to be mentioned
> in the documentation.
>
Indeed it is a bitmap , will change this part as below in V4.

What:
/sys/bus/wmi/devices/6932965F-1671-4CEB-B988-D3AB0A901919/devices_supported
Date: Jan 2021
-KernelVersion: 5.11
-Contact: "perry_yuan@dell.com>"
+KernelVersion: 5.12
+Contact: "perry.yuan@dell.com>"
Description:
Display which dell hardware level privacy devices are
supported
“Dell Privacy” is a set of HW, FW, and SW features to
enhance
Dell’s commitment to platform privacy for MIC, Camera, and
ePrivacy screens.
- The supported privacy haredware privacy devices are:
- * 0x0 - None,
- * 0x1 - Microphone,
- * 0x2 - Camera,
- * 0x4 - ePrivacy Screen
+ The supported hardware privacy devices are:
+ - 0 = Not Supported
+ - 1 = Supported
+ - Bit0 -> Microphone
+ - Bit1 -> Camera
+ - Bit2 -> ePrivacy Screen

>> +
>> +What: /sys/bus/wmi/devices/6932965F-1671-4CEB-B988-
>> D3AB0A901919/current_state
>> +Date: Jan 2021
>> +KernelVersion: 5.11
>> +Contact: "perry_yuan@dell.com>"
>> +Description:
>> + Allow user space to check current dell privacy device state.
>> + Describes the Device State class exposed by BIOS which can be
>> + consumed by various applications interested in knowing the Privacy
>> + feature capabilities
>> + There are three Bits for available states:
>> + * 0 -> Off
>> + * 1 -> On
>> + * Bit0 -> Microphone
>> + * Bit1 -> Camera
>> + * Bit2 -> ePrivacyScreen
>> +
>> --
>> 2.25.1
>

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