- Read the DPCD capabilities fields out of the sink device
0x0000B) though the AUX channel.
- Determine values for lane count, link speed, enhanced framing mode, downspread control and main link channel code based on each link partners’ capability and needs.
- Write the configuration parameters to the link configuration
0x00101) of the DPCD through the AUX channel.Note: Some Sink devices’ DPCD capability fields are unreliable. Many source devices start with the maximum transmitter capabilities and scale back as necessary to find a configuration the Sink device can handle. This could be an advisable strategy instead of relying on DPCD values.
- Equivalently, write the appropriate values to the Source core’s
local configuration space.