drm/dp: Add DisplayPort link helpers
Add a helper to probe a DP link (read out the supported DPCD revision, maximum rate, link count and capabilities) as well as power up the DP link and configure it accordingly. Reviewed-by:Alex Deucher <alexander.deucher@amd.com> Reviewed-by:
Jani Nikula <jani.nikula@intel.com> Signed-off-by:
Thierry Reding <treding@nvidia.com> --- Changes in v5: - export helpers Changes in v4: - fix a couple of typos in comments as pointed out by Alex Deucher Changes in v3: - split into drm_dp_link_power_up() and drm_dp_link_configure() - do not change sink state for DPCD versions earlier than 1.1 - sleep for 1-2 ms after setting local sink to D0 state - read and write consecutive registers where possible - read DPCD revision when link is probed - remove duplicate kerneldoc
parent
8d4adc6a
Please register or sign in to comment