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Message-ID: <58cf1777-222f-4156-9079-bcbba4a32c96@tuxedocomputers.com>
Date: Sat, 28 Sep 2024 10:23:30 +0200
From: Werner Sembach <wse@...edocomputers.com>
To: Benjamin Tissoires <bentiss@...nel.org>, Armin Wolf <W_Armin@....de>
Cc: Pavel Machek <pavel@....cz>, Hans de Goede <hdegoede@...hat.com>,
Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>,
dri-devel@...ts.freedesktop.org, jelle@...aa.nl, jikos@...nel.org,
lee@...nel.org, linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-leds@...r.kernel.org, miguel.ojeda.sandonis@...il.com,
ojeda@...nel.org, onitake@...il.com, platform-driver-x86@...r.kernel.org
Subject: Re: [PATCH 1/1] platform/x86/tuxedo: Add virtual LampArray for TUXEDO
NB04 devices
Hi,
Am 28.09.24 um 09:27 schrieb Benjamin Tissoires:
> On Sep 28 2024, Armin Wolf wrote:
>> Am 27.09.24 um 23:01 schrieb Pavel Machek:
>>
>>> Hi!
>>>
>>>> The TUXEDO Sirius 16 Gen1 and TUXEDO Sirius 16 Gen2 devices have a per-key
>>>> controllable RGB keyboard backlight. The firmware API for it is implemented
>>>> via WMI.
>>> Ok.
>>>
>>>> To make the backlight userspace configurable this driver emulates a
>>>> LampArray HID device and translates the input from hidraw to the
>>>> corresponding WMI calls. This is a new approach as the leds subsystem lacks
>>>> a suitable UAPI for per-key keyboard backlights, and like this no new UAPI
>>>> needs to be established.
>>> Please don't.
>>>
>>> a) I don't believe emulating crazy HID interface si right thing to
>>> do. (Ton of magic constants. IIRC it stores key positions with
>>> micrometer accuracy or something that crazy. How is userland going to
>>> use this? Will we update micrometers for every single machine?)
> This is exactly why I suggest to make use of HID-BPF. The machine
> specifics is going to be controlled by userspace, leaving out the crazy
> bits out of the kernel.
From just a quick look at
https://www.kernel.org/doc/html/latest/hid/hid-bpf.html HID-BPF is some
kind HID remapping?
But the device in question nativly does not have a hid interface for the
backlight. It is controlled via WMI calls.
Afaik userspace on linux has no access to WMI? How could HID-BPF
implement the WMI calls?
>
>>> Even if it is,
>>>
>>> b) The emulation should go to generic layer, it is not specific to
>>> your hardware.
> Well, there is not so much about an emulation here. It's a different way
> of presenting the information.
> But given that HID LampArray is a HID standard, userspace is able to
> implement it once for all the operating systems, which is why this is so
> appealing for them. For reference, we have the same issue with SDL and
> Steam regarding advanced game controller: they very much prefer to
> directly use HID(raw) to talk to the device instead of having a Linux
> specific interface.
>
> Also, starting with v6.12, systemd (logind) will be able to provide
> hidraw node access to non root applications (in the same way you can
> request an input evdev node). So HID LampArray makes a lot of sense IMO.
>
>> Maybe introducing a misc-device which provides an ioctl-based API similar
>> to the HID LampArray would be a solution?
>>
>> Basically we would need:
>> - ioctl for querying the supported LEDs and their properties
>> - ioctl for enabling/disabling autonomous mode
>> - ioctl for updating a range of LEDs
>> - ioctl for updating multiple LEDs at once
> You'll definitely get the API wrong at first, then you'll need to adapt
> for a new device, extend it, etc... But then, you'll depend on one
> userspace application that can talk to your custom ioctls, because cross
> platform applications will have to implement LampArray, and they'ĺl
> probably skip your custom ioctls. And once that userspace application is
> gone, you'll still have to maintain this forever.
>
> Also, the application needs to have root access to that misc device, or
> you need to add extra support for it in systemd...
>
>> If we implement this as a separate subsystem ("illumination subsystem"), then different
>> drivers could use this. This would also allow us to add additional ioctl calls later
>> for more features.
> Again, I strongly advise against this.
>
> I'll just reiterate what makes the more sense to me:
> - provide a thin wmi-to-hid layer that creates a normal regular HID
> device from your device (could be using vendor collections)
This is what this driver tries to be.
> - deal with the LampArray bits in the HID stack, that we can reuse for
> other devices (I was planing on getting there for my Corsair and
> Logitech keyboads).
If a greater efford in the hid stack is planed here i would be all for it.
On my todolist i would try to integrate the leds subsystem with the
LampArray interface next, just a simple implementation treating the
whole keyboard as a single led.
> - Meanwhile, while prototyping the LampArray support in userspace and
> kernelspace, make use of HID-BPF to transform your vendor protocol
> into LampArray. This will allow to fix things without having to
> support them forever. This is why HID-BPF exists: so we can create
> crazy but safe kernel interfaces, without having to support them
> forever.
I guess i have to do some readup xD.
Regards,
Werner
>
> Cheers,
> Benjamin
>
>> Thanks,
>> Armin Wolf
>>
>>>> +
>>>> +// We don't know if the WMI API is stable and how unique the GUID is for this ODM. To be on the safe
>>>> +// side we therefore only run this driver on tested devices defined by this list.
>>> 80 columns, /* */ is usual comment style.
>>>
>>> To illustrate my point... this is crazy:
>>>
>>> (and would require equally crazy par in openrgb to parse).
>>>
>>> Best regards,
>>> Pavel
>>>
>>>> +
>>>> +static const uint8_t sirius_16_ansii_kbl_mapping[] = {
>>>> + 0x29, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42,
>>>> + 0x43, 0x44, 0x45, 0xf1, 0x46, 0x4c, 0x4a, 0x4d, 0x4b, 0x4e,
>>>> + 0x35, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26,
>>>> + 0x27, 0x2d, 0x2e, 0x2a, 0x53, 0x55, 0x54, 0x56,
>>>> + 0x2b, 0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c, 0x12,
>>>> + 0x13, 0x2f, 0x30, 0x31, 0x5f, 0x60, 0x61,
>>>> + 0x39, 0x04, 0x16, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f,
>>>> + 0x33, 0x34, 0x28, 0x5c, 0x5d, 0x5e, 0x57,
>>>> + 0xe1, 0x1d, 0x1b, 0x06, 0x19, 0x05, 0x11, 0x10, 0x36, 0x37,
>>>> + 0x38, 0xe5, 0x52, 0x59, 0x5a, 0x5b,
>>>> + 0xe0, 0xfe, 0xe3, 0xe2, 0x2c, 0xe6, 0x65, 0xe4, 0x50, 0x51,
>>>> + 0x4f, 0x62, 0x63, 0x58
>>>> +};
>>>> +
>>>> +static const uint32_t sirius_16_ansii_kbl_mapping_pos_x[] = {
>>>> + 25000, 41700, 58400, 75100, 91800, 108500, 125200, 141900, 158600, 175300,
>>>> + 192000, 208700, 225400, 242100, 258800, 275500, 294500, 311200, 327900, 344600,
>>>> + 24500, 42500, 61000, 79500, 98000, 116500, 135000, 153500, 172000, 190500,
>>>> + 209000, 227500, 246000, 269500, 294500, 311200, 327900, 344600,
>>>> + 31000, 51500, 70000, 88500, 107000, 125500, 144000, 162500, 181000, 199500,
>>>> + 218000, 236500, 255000, 273500, 294500, 311200, 327900,
>>>> + 33000, 57000, 75500, 94000, 112500, 131000, 149500, 168000, 186500, 205000,
>>>> + 223500, 242000, 267500, 294500, 311200, 327900, 344600,
>>>> + 37000, 66000, 84500, 103000, 121500, 140000, 158500, 177000, 195500, 214000,
>>>> + 232500, 251500, 273500, 294500, 311200, 327900,
>>>> + 28000, 47500, 66000, 84500, 140000, 195500, 214000, 234000, 255000, 273500,
>>>> + 292000, 311200, 327900, 344600
>>>> +};
>>>> +
>>>> +static const uint32_t sirius_16_ansii_kbl_mapping_pos_y[] = {
>>>> + 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000,
>>>> + 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000,
>>>> + 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500,
>>>> + 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500,
>>>> + 85500, 85500, 85500, 85500, 85500, 85500, 85500, 85500, 85500, 85500,
>>>> + 85500, 85500, 85500, 85500, 85500, 85500, 85500,
>>>> + 103500, 103500, 103500, 103500, 103500, 103500, 103500, 103500, 103500, 103500,
>>>> + 103500, 103500, 103500, 103500, 103500, 103500, 94500,
>>>> + 121500, 121500, 121500, 121500, 121500, 121500, 121500, 121500, 121500, 121500,
>>>> + 121500, 121500, 129000, 121500, 121500, 121500,
>>>> + 139500, 139500, 139500, 139500, 139500, 139500, 139500, 139500, 147000, 147000,
>>>> + 147000, 139500, 139500, 130500
>>>> +};
>>>> +
>>>> +static const uint32_t sirius_16_ansii_kbl_mapping_pos_z[] = {
>>>> + 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000,
>>>> + 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000,
>>>> + 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250,
>>>> + 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250,
>>>> + 5500, 5500, 5500, 5500, 5500, 5500, 5500, 5500, 5500, 5500,
>>>> + 5500, 5500, 5500, 5500, 5500, 5500, 5500,
>>>> + 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5750,
>>>> + 5750, 5750, 5750, 5750, 5750, 5750, 5625,
>>>> + 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000,
>>>> + 6000, 6000, 6125, 6000, 6000, 6000,
>>>> + 6250, 6250, 6250, 6250, 6250, 6250, 6250, 6250, 6375, 6375,
>>>> + 6375, 6250, 6250, 6125
>>>> +};
>>>> +
>>>> +static const uint8_t sirius_16_iso_kbl_mapping[] = {
>>>> + 0x29, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, 0x40, 0x41, 0x42,
>>>> + 0x43, 0x44, 0x45, 0xf1, 0x46, 0x4c, 0x4a, 0x4d, 0x4b, 0x4e,
>>>> + 0x35, 0x1e, 0x1f, 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26,
>>>> + 0x27, 0x2d, 0x2e, 0x2a, 0x53, 0x55, 0x54, 0x56,
>>>> + 0x2b, 0x14, 0x1a, 0x08, 0x15, 0x17, 0x1c, 0x18, 0x0c, 0x12,
>>>> + 0x13, 0x2f, 0x30, 0x5f, 0x60, 0x61,
>>>> + 0x39, 0x04, 0x16, 0x07, 0x09, 0x0a, 0x0b, 0x0d, 0x0e, 0x0f,
>>>> + 0x33, 0x34, 0x32, 0x28, 0x5c, 0x5d, 0x5e, 0x57,
>>>> + 0xe1, 0x64, 0x1d, 0x1b, 0x06, 0x19, 0x05, 0x11, 0x10, 0x36,
>>>> + 0x37, 0x38, 0xe5, 0x52, 0x59, 0x5a, 0x5b,
>>>> + 0xe0, 0xfe, 0xe3, 0xe2, 0x2c, 0xe6, 0x65, 0xe4, 0x50, 0x51,
>>>> + 0x4f, 0x62, 0x63, 0x58
>>>> +};
>>>> +
>>>> +static const uint32_t sirius_16_iso_kbl_mapping_pos_x[] = {
>>>> + 25000, 41700, 58400, 75100, 91800, 108500, 125200, 141900, 158600, 175300,
>>>> + 192000, 208700, 225400, 242100, 258800, 275500, 294500, 311200, 327900, 344600,
>>>> + 24500, 42500, 61000, 79500, 98000, 116500, 135000, 153500, 172000, 190500,
>>>> + 209000, 227500, 246000, 269500, 294500, 311200, 327900, 344600,
>>>> + 31000, 51500, 70000, 88500, 107000, 125500, 144000, 162500, 181000, 199500,
>>>> + 218000, 234500, 251000, 294500, 311200, 327900,
>>>> + 33000, 57000, 75500, 94000, 112500, 131000, 149500, 168000, 186500, 205000,
>>>> + 223500, 240000, 256500, 271500, 294500, 311200, 327900, 344600,
>>>> + 28000, 47500, 66000, 84500, 103000, 121500, 140000, 158500, 177000, 195500,
>>>> + 214000, 232500, 251500, 273500, 294500, 311200, 327900,
>>>> + 28000, 47500, 66000, 84500, 140000, 195500, 214000, 234000, 255000, 273500,
>>>> + 292000, 311200, 327900, 344600
>>>> +};
>>>> +
>>>> +static const uint32_t sirius_16_iso_kbl_mapping_pos_y[] = {
>>>> + 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000,
>>>> + 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000, 53000,
>>>> + 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500,
>>>> + 67500, 67500, 67500, 67500, 67500, 67500, 67500, 67500,
>>>> + 85500, 85500, 85500, 85500, 85500, 85500, 85500, 85500, 85500, 85500,
>>>> + 85500, 85500, 85500, 85500, 85500, 85500,
>>>> + 103500, 103500, 103500, 103500, 103500, 103500, 103500, 103500, 103500, 103500,
>>>> + 103500, 103500, 103500, 94500, 103500, 103500, 103500, 94500,
>>>> + 121500, 121500, 121500, 121500, 121500, 121500, 121500, 121500, 121500, 121500,
>>>> + 121500, 121500, 121500, 129000, 121500, 121500, 121500,
>>>> + 139500, 139500, 139500, 139500, 139500, 139500, 139500, 139500, 147000, 147000,
>>>> + 147000, 139500, 139500, 130500
>>>> +};
>>>> +
>>>> +static const uint32_t sirius_16_iso_kbl_mapping_pos_z[] = {
>>>> + 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000,
>>>> + 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000, 5000,
>>>> + 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250,
>>>> + 5250, 5250, 5250, 5250, 5250, 5250, 5250, 5250,
>>>> + 5500, 5500, 5500, 5500, 5500, 5500, 5500, 5500, 5500, 5500,
>>>> + 5500, 5500, 5500, 5500, 5500, 5500,
>>>> + 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5750,
>>>> + 5750, 5750, 5750, 5750, 5750, 5750, 5750, 5625,
>>>> + 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000, 6000,
>>>> + 6000, 6000, 6000, 6125, 6000, 6000, 6000,
>>>> + 6250, 6250, 6250, 6250, 6250, 6250, 6250, 6250, 6375, 6375,
>>>> + 6375, 6250, 6250, 6125
>>>> +};
>>> ...
>>>> +
>>>> +static uint8_t report_descriptor[327] = {
>>>> + 0x05, 0x59, // Usage Page (Lighting and Illumination)
>>>> + 0x09, 0x01, // Usage (Lamp Array)
>>>> + 0xa1, 0x01, // Collection (Application)
>>>> + 0x85, LAMP_ARRAY_ATTRIBUTES_REPORT_ID, // Report ID (1)
>>>> + 0x09, 0x02, // Usage (Lamp Array Attributes Report)
>>>> + 0xa1, 0x02, // Collection (Logical)
>>>> + 0x09, 0x03, // Usage (Lamp Count)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0x00, 0x00, // Logical Maximum (65535)
>>>> + 0x75, 0x10, // Report Size (16)
>>>> + 0x95, 0x01, // Report Count (1)
>>>> + 0xb1, 0x03, // Feature (Cnst,Var,Abs)
>>>> + 0x09, 0x04, // Usage (Bounding Box Width In Micrometers)
>>>> + 0x09, 0x05, // Usage (Bounding Box Height In Micrometers)
>>>> + 0x09, 0x06, // Usage (Bounding Box Depth In Micrometers)
>>>> + 0x09, 0x07, // Usage (Lamp Array Kind)
>>>> + 0x09, 0x08, // Usage (Min Update Interval In Microseconds)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0xff, 0x7f, // Logical Maximum (2147483647)
>>>> + 0x75, 0x20, // Report Size (32)
>>>> + 0x95, 0x05, // Report Count (5)
>>>> + 0xb1, 0x03, // Feature (Cnst,Var,Abs)
>>>> + 0xc0, // End Collection
>>>> + 0x85, LAMP_ATTRIBUTES_REQUEST_REPORT_ID, // Report ID (2)
>>>> + 0x09, 0x20, // Usage (Lamp Attributes Request Report)
>>>> + 0xa1, 0x02, // Collection (Logical)
>>>> + 0x09, 0x21, // Usage (Lamp Id)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0x00, 0x00, // Logical Maximum (65535)
>>>> + 0x75, 0x10, // Report Size (16)
>>>> + 0x95, 0x01, // Report Count (1)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0xc0, // End Collection
>>>> + 0x85, LAMP_ATTRIBUTES_RESPONSE_REPORT_ID, // Report ID (3)
>>>> + 0x09, 0x22, // Usage (Lamp Attributes Response Report)
>>>> + 0xa1, 0x02, // Collection (Logical)
>>>> + 0x09, 0x21, // Usage (Lamp Id)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0x00, 0x00, // Logical Maximum (65535)
>>>> + 0x75, 0x10, // Report Size (16)
>>>> + 0x95, 0x01, // Report Count (1)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0x09, 0x23, // Usage (Position X In Micrometers)
>>>> + 0x09, 0x24, // Usage (Position Y In Micrometers)
>>>> + 0x09, 0x25, // Usage (Position Z In Micrometers)
>>>> + 0x09, 0x27, // Usage (Update Latency In Microseconds)
>>>> + 0x09, 0x26, // Usage (Lamp Purposes)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0xff, 0x7f, // Logical Maximum (2147483647)
>>>> + 0x75, 0x20, // Report Size (32)
>>>> + 0x95, 0x05, // Report Count (5)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0x09, 0x28, // Usage (Red Level Count)
>>>> + 0x09, 0x29, // Usage (Green Level Count)
>>>> + 0x09, 0x2a, // Usage (Blue Level Count)
>>>> + 0x09, 0x2b, // Usage (Intensity Level Count)
>>>> + 0x09, 0x2c, // Usage (Is Programmable)
>>>> + 0x09, 0x2d, // Usage (Input Binding)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x26, 0xff, 0x00, // Logical Maximum (255)
>>>> + 0x75, 0x08, // Report Size (8)
>>>> + 0x95, 0x06, // Report Count (6)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0xc0, // End Collection
>>>> + 0x85, LAMP_MULTI_UPDATE_REPORT_ID, // Report ID (4)
>>>> + 0x09, 0x50, // Usage (Lamp Multi Update Report)
>>>> + 0xa1, 0x02, // Collection (Logical)
>>>> + 0x09, 0x03, // Usage (Lamp Count)
>>>> + 0x09, 0x55, // Usage (Lamp Update Flags)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x25, 0x08, // Logical Maximum (8)
>>>> + 0x75, 0x08, // Report Size (8)
>>>> + 0x95, 0x02, // Report Count (2)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0x09, 0x21, // Usage (Lamp Id)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0x00, 0x00, // Logical Maximum (65535)
>>>> + 0x75, 0x10, // Report Size (16)
>>>> + 0x95, 0x08, // Report Count (8)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x26, 0xff, 0x00, // Logical Maximum (255)
>>>> + 0x75, 0x08, // Report Size (8)
>>>> + 0x95, 0x20, // Report Count (32)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0xc0, // End Collection
>>>> + 0x85, LAMP_RANGE_UPDATE_REPORT_ID, // Report ID (5)
>>>> + 0x09, 0x60, // Usage (Lamp Range Update Report)
>>>> + 0xa1, 0x02, // Collection (Logical)
>>>> + 0x09, 0x55, // Usage (Lamp Update Flags)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x25, 0x08, // Logical Maximum (8)
>>>> + 0x75, 0x08, // Report Size (8)
>>>> + 0x95, 0x01, // Report Count (1)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0x09, 0x61, // Usage (Lamp Id Start)
>>>> + 0x09, 0x62, // Usage (Lamp Id End)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x27, 0xff, 0xff, 0x00, 0x00, // Logical Maximum (65535)
>>>> + 0x75, 0x10, // Report Size (16)
>>>> + 0x95, 0x02, // Report Count (2)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0x09, 0x51, // Usage (Red Update Channel)
>>>> + 0x09, 0x52, // Usage (Green Update Channel)
>>>> + 0x09, 0x53, // Usage (Blue Update Channel)
>>>> + 0x09, 0x54, // Usage (Intensity Update Channel)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x26, 0xff, 0x00, // Logical Maximum (255)
>>>> + 0x75, 0x08, // Report Size (8)
>>>> + 0x95, 0x04, // Report Count (4)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0xc0, // End Collection
>>>> + 0x85, LAMP_ARRAY_CONTROL_REPORT_ID, // Report ID (6)
>>>> + 0x09, 0x70, // Usage (Lamp Array Control Report)
>>>> + 0xa1, 0x02, // Collection (Logical)
>>>> + 0x09, 0x71, // Usage (Autonomous Mode)
>>>> + 0x15, 0x00, // Logical Minimum (0)
>>>> + 0x25, 0x01, // Logical Maximum (1)
>>>> + 0x75, 0x08, // Report Size (8)
>>>> + 0x95, 0x01, // Report Count (1)
>>>> + 0xb1, 0x02, // Feature (Data,Var,Abs)
>>>> + 0xc0, // End Collection
>>>> + 0xc0 // End Collection
>>>> +};
>>>> +
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