An anonymous reader shared this report from Phoronix:
A pull request of early AMDGPU kernel graphics driver changes was submitted for DRM-Next on Friday as some of the early feature work accumulating for the Linux 6.4 kernel cycle.
Among the AMDGPU kernel driver changes this round are a number of fixes affecting items such as the UMC RAS, DCN 3.2, FreeSync, SR-IOV, various IP blocks, USB4, and more. On the feature side, mentioned subtly in the change-log are a few power-related additions… These additions are largely focused on Van Gogh APUs, which is notably for the Valve Steam Deck and benefiting its graphics moving forward.
First up, this kernel pull request introduces a new sysfs interface for adjusting/setting thermal throttling. This is wired up for Van Gogh and allows reading/updating the thermal limit temperature in millidegrees Celsius. This “APU thermal cap” interface is just wired up for Van Gogh and seems