[PATCH v5 3/4] drm/dp_helper: Perform throw-away read before actual read in drm_dp_dpcd_read()

On Wed, Apr 13, 2016 at 10:58:32AM -0400, Lyude wrote: > This is part of a patch series to migrate all of the workarounds for > commonly seen behavior from bad sinks in intel_dp_dpcd_read_wake() to drm's > DP helper. > > Some sinks will just return garbage for the first aux tranaction they >

[PATCH v5 3/4] drm/dp_helper: Perform throw-away read before actual read in drm_dp_dpcd_read()

This is part of a patch series to migrate all of the workarounds for commonly seen behavior from bad sinks in intel_dp_dpcd_read_wake() to drm's DP helper. Some sinks will just return garbage for the first aux tranaction they receive when coming out of sleep mode, so we need to perform an