Documentation for RGB strip on RX 7900 XTX (Reference)

Tue Jan 9 22:58:56 UTC 2024

[Public]

> -----Original Message-----
> From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of
> Deucher, Alexander
> Sent: Tuesday, January 9, 2024 5:29 PM
> To: Alexander Koskovich <AKoskovich at protonmail.com>
> Cc: amd-gfx at lists.freedesktop.org
> Subject: RE: Documentation for RGB strip on RX 7900 XTX (Reference)
> >
> > -----Original Message-----
> > From: Alexander Koskovich <AKoskovich at protonmail.com>
> > Sent: Tuesday, January 9, 2024 4:59 PM
> > To: Deucher, Alexander <Alexander.Deucher at amd.com>
> > Cc: amd-gfx at lists.freedesktop.org
> > Subject: RE: Documentation for RGB strip on RX 7900 XTX (Reference)
> >
> > Is the AIB/OEM for this board not AMD?
> > https://www.amd.com/en/products/graphics/amd-radeon-rx-7900xtx
> >
>
> I'll double check (we usually don't produce reference boards with RGB), but
> my understanding is that if any of the boards available for sale on amd.com
> has RGB controls, the RGB control is provided by a third party vendor.

CoolerMaster provides the RGB solution.  See:
https://www.amd.com/en/support/graphics/amd-radeon-rx-7000-series/amd-radeon-rx-7900-series/amd-radeon-rx-7900xtx

Alex

>
> Alex
>
> >
> >
> > On Tuesday, January 9th, 2024 at 4:53 PM, Deucher, Alexander
> > <Alexander.Deucher at amd.com> wrote:
> >
> >
> > >
> > >
> > > [AMD Official Use Only - General]
> > >
> > > > -----Original Message-----
> > > > From: Alexander Koskovich AKoskovich at protonmail.com
> > > > Sent: Tuesday, January 9, 2024 3:27 PM
> > > > To: Deucher, Alexander Alexander.Deucher at amd.com
> > > > Cc: amd-gfx at lists.freedesktop.org
> > > > Subject: RE: Documentation for RGB strip on RX 7900 XTX
> > > > (Reference)
> > > >
> > > > Doe AMD have documentation on the i2c data that gets sent
> > > > currently though? I was hoping to figure out what you need to
> > > > change in the command that gets sent to change stuff like
> > > > brightness, color (red, green, blue), rainbow, morse code, etc.
> > >
> > >
> > > It depends on the LED controller used by the AIB/OEM. The
> > > programming
> > sequence is dependent on the LED controller.
> > >
> > > Alex
> > >
> > > > On Tuesday, January 9th, 2024 at 10:10 AM, Deucher, Alexander
> > > > Alexander.Deucher at amd.com wrote:
> > > >
> > > > > [Public]
> > > > >
> > > > > > -----Original Message-----
> > > > > > From: Alexander Koskovich AKoskovich at protonmail.com
> > > > > > Sent: Monday, January 8, 2024 7:22 PM
> > > > > > To: Deucher, Alexander Alexander.Deucher at amd.com
> > > > > > Cc: amd-gfx at lists.freedesktop.org
> > > > > > Subject: RE: Documentation for RGB strip on RX 7900 XTX
> > > > > > (Reference)
> > > > > >
> > > > > > Currently the reference cooler from AMD does not have an
> > > > > > existing RGB controller for OpenRGB, that's why I was looking
> > > > > > for documentation on the I2C commands to send to the second
> > > > > > SMU, so I don't risk bricking my card by sending wrong
> > > > > > commands during development somehow.
> > > > > >
> > > > > > writeSetCMDWithData:
> > > > > >
> > **************************************************************
> > > > > > adli2c.iSize = sizeof(ADLI2C)
> > > > > > adli2c.iAction = ADL_DL_I2C_ACTIONWRITE adli2c.iAddress = 0xb4
> > > > > > adli2c.iSpeed = 100
> > > > > > 0 --------------------------------------------------
> > > > > > Dev 0: ADL_Display_WriteAndReadSMUI2C(0, &adli2c) = 0
> > > > > > adli2c.iDataSize =
> > > > > > 24 i2cData[0]~[24]
> > > > > > 40 51 2c 01 00 00 ff 00 ff ff ff cc 00 cc 00 00 00 ff ff ff ff
> > > > > > ff ff ff
> > > > > >
> > > > > > From the RGB app's logs this is an example of what the
> > > > > > official AMD application on Windows is sending when it changes
> > > > > > colors on the
> > RGB strip.
> > > > > >
> > > > > > From this can it be assumed the AMD card is using the latter
> > > > > > method you mentioned with the second SMU I2C bus, in which
> > > > > > case no driver changes would be needed?
> > > > >
> > > > > IIRC, each AIB/OEM uses its own preferred RGB controller. The
> > > > > reference board just defines which i2c buses can be used. The
> > > > > RGB control application is just a userspace app provided by the
> > > > > AIB/OEM that calls ADL to talk to whichever i2c bus the vendor
> > > > > put their RGB controller on. On Linux you can do something
> > > > > similar using the i2c_dev module to open a connection to the i2c
> > > > > bus driver
> > provided by the kernel. I believe that is what openRGB does today.
> > > > > It looks like you already have the programming sequence above.
> > > > >
> > > > > Alex
> > > > >
> > > > > > On Monday, January 8th, 2024 at 5:32 PM, Deucher, Alexander
> > > > > > Alexander.Deucher at amd.com wrote:
> > > > > >
> > > > > > > [Public]
> > > > > > >
> > > > > > > > -----Original Message-----
> > > > > > > > From: amd-gfx amd-gfx-bounces at lists.freedesktop.org On
> > > > > > > > Behalf Of Alexander Koskovich
> > > > > > > > Sent: Sunday, January 7, 2024 11:19 PM
> > > > > > > > To: amd-gfx at lists.freedesktop.org
> > > > > > > > Subject: Documentation for RGB strip on RX 7900 XTX
> > > > > > > > (Reference)
> > > > > > > >
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > > I was wondering if AMD would be able provide any
> > > > > > > > documentation for the RGB strip on the reference cooler
> > > > > > > > (https://www.amd.com/en/products/graphics/amd-radeon-rx-
> > > > > > > > 7900xtx)?
> > > > > > > > It
> > > > > > > > looks to be handled via I2C commands to the SMU, but
> > > > > > > > having proper documentation would be extremely helpful.
> > > > > > >
> > > > > > > It depends on the AIB/OEM and how they designed the specific
> > > > > > > board. The RGB controller will either be attached to the
> > > > > > > DDCVGA i2c bus on the display hardware or the second SMU i2c
> > > > > > > bus. The former will require changes to the amdgpu display
> > > > > > > code to register display i2c buses that are not used by the
> > > > > > > display connectors on the board so they can be used by 3rd
> > > > > > > party
> > applications.
> > > > > > > Currently we only register i2c buses used for display connectors.
> > > > > > > The latter buses are already registered with the i2c
> > > > > > > subsystem since they are used for other things like EEPROMs
> > > > > > > on server and workstation cards and should be available via
> > > > > > > standard Linux i2c APIs. I'm not sure what i2c LED
> > > > > > > controllers each AIB vendor uses off hand.
> > > > > > > https://openrgb.org/index.html would probably be a good resource
> for that information.
> > > > > > >
> > > > > > > Alex