tree 47e2c5460e2dc7babd6f4c90224e3cbd218d2c29
parent 28fd36608c36aa25ae90d19c95833206459d43b2
author David Stevens <stevensd@google.com> 1537554061 -0700
committer CQ bot account: commit-bot@chromium.org <commit-bot@chromium.org> 1537812192 +0000

[intel-i915] Load clock rate from DP transcoder

Configuring a transcoder for DP requires knowing the pixel clock rate.
Since we reallocate transcoders rather aggressively, we need to load
the pixel clock rate from hardware if we're reusing the BIOS display
configuration.

Test: Run gfxtest on a NUC with 2 DP monitors and make sure both
monitors work after the test finishes.

Change-Id: I8fc96f45d6d3ca21c2cc316f05604b616f6f1c0f