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drm/i915/mst: Wait for ACT sent before enabling the pipe
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Thu, 7 May 2020 14:41:25 +0000 (17:41 +0300)
committerVille Syrjälä <ville.syrjala@linux.intel.com>
Mon, 11 May 2020 12:52:52 +0000 (15:52 +0300)
commit90c49a09c8495f1eac05b42a3f79fdc6bcb1eef0
treec39fc66e0f445dc8444e1125e10c70dd963cac3a
parenta80d73673bc7676d0bab7f7ab51d00c5e461992d
drm/i915/mst: Wait for ACT sent before enabling the pipe

The correct sequence according to bspec is to wait for the ACT sent
status before we turn on the pipe. Make it so.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200507144125.2458-1-ville.syrjala@linux.intel.com
Reviewed-by: Imre Deak <imre.deak@intel.com>
drivers/gpu/drm/i915/display/intel_dp_mst.c