[PATCH v3 0/3] drm: zynqmp_dp: Retrain link after HPD if necessary

[Sean Anderson]

I noticed that after reconnecting a mini-displayport cable, the sink
would not display an image. But if I forced the link to re-train, the
image would come back.

Some digging revealed that the DP spec requires retraining after a HPD
event if the sink syas the link has gone down. So implement that since
it fixes my problem and it's required by spec.

Changes in v3:
- Simplify HPD retrain condition

Changes in v2:
- needs_retain -> needs_retrain
- Actually retrain the loop (accidentally removed while rebasing)

Sean Anderson (3):
  drm: zynqmp_dp: Update connector state before AUX transfers
  drm: zynqmp_dp: Use smp_load/store for status
  drm: zynqmp_dp: Retrain link after HPD if necessary

 drivers/gpu/drm/xlnx/zynqmp_dp.c | 42 +++++++++++++++++++-------------
 1 file changed, 25 insertions(+), 17 deletions(-)

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2.35.1.1320.gc452695387.dirty