Is the AIB/OEM for this board not AMD? https://www.amd.com/en/products/graphics/amd-radeon-rx-7900xtx On Tuesday, January 9th, 2024 at 4:53 PM, Deucher, Alexander <Alexander.Deucher@xxxxxxx> wrote: > > > [AMD Official Use Only - General] > > > -----Original Message----- > > From: Alexander Koskovich AKoskovich@xxxxxxxxxxxxxx > > Sent: Tuesday, January 9, 2024 3:27 PM > > To: Deucher, Alexander Alexander.Deucher@xxxxxxx > > Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx > > 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@xxxxxxx wrote: > > > > > [Public] > > > > > > > -----Original Message----- > > > > From: Alexander Koskovich AKoskovich@xxxxxxxxxxxxxx > > > > Sent: Monday, January 8, 2024 7:22 PM > > > > To: Deucher, Alexander Alexander.Deucher@xxxxxxx > > > > Cc: amd-gfx@xxxxxxxxxxxxxxxxxxxxx > > > > 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@xxxxxxx wrote: > > > > > > > > > [Public] > > > > > > > > > > > -----Original Message----- > > > > > > From: amd-gfx amd-gfx-bounces@xxxxxxxxxxxxxxxxxxxxx On Behalf Of > > > > > > Alexander Koskovich > > > > > > Sent: Sunday, January 7, 2024 11:19 PM > > > > > > To: amd-gfx@xxxxxxxxxxxxxxxxxxxxx > > > > > > 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
