[Xenial][SRU][PATCH 0/2] #LP1599379 Baytrail-I got black screen with HDMI output

Phidias Chiang phidias.chiang at canonical.com
Thu Jul 7 08:24:27 UTC 2016


This issue happens with 4.0+ kernels. Bisecting shows following commit cause the issue:

commit d2182a660808d9053a605e3ebc8c46a323ec6e5d
Author: Ville Syrjälä <ville.syrjala at linux.intel.com>
Date: Fri Jan 9 14:21:14 2015 +0200

    drm/i915: Don't register HDMI connectors for eDP ports on VLV/CHV

The issue has been reported to upstream [1] and the fix has been merged.

[1]: https://bugs.freedesktop.org/show_bug.cgi?id=96288

Test on two different BayTrail-I hardwares and they work well

Chris Wilson (1):
  drm/i915: Only ignore eDP ports that are connected

Ville Syrjälä (1):
  drm/i915: Check VBT for port presence in addition to the strap on
    VLV/CHV

 drivers/gpu/drm/i915/i915_drv.h      |  3 +++
 drivers/gpu/drm/i915/intel_bios.c    | 39 +++++++++++++++++++++++++++++++++++
 drivers/gpu/drm/i915/intel_display.c | 40 +++++++++++++++++++++++-------------
 drivers/gpu/drm/i915/intel_dp.c      | 12 +++++------
 drivers/gpu/drm/i915/intel_drv.h     |  2 +-
 drivers/gpu/drm/i915/intel_hdmi.c    |  3 +++
 6 files changed, 78 insertions(+), 21 deletions(-)

-- 
2.7.3





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