Hi Linus,

As mentioned I have a separate request for fixing a regression, but also keeping the broken hw working, for certain USB-C DP adapters they require a minimised n/m parameters, but an attempt to do this generically has failed, we need to quirk these specific adapters. However doing it generically regressed some eDP panels.

This pull adds the infrastructure and a quirk for the adapter.

Dave.

The following changes since commit 400129f0a3ae989c30b37104bbc23b35c9d7a9a4:

Merge tag 'exynos-drm-fixes-for-v4.12' of git://git.kernel.org/pub/scm/linux/kernel/git/daeinki/drm-exynos into drm-fixes (2017-06-01 12:07:48 +1000)

are available in the git repository at:

git://people.freedesktop.org/~airlied/linux tags/drm-dp-quirk-for-v4.12-rc4

for you to fetch changes up to 28904eeced2c6cf6d315c675e79e1700ef7507ac:

Merge tag 'topic/dp-quirks-2017-05-31' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes (2017-06-02 12:57:32 +1000)

---------------------------------------------------------------- DP quirk for usb c dongles

---------------------------------------------------------------- Dave Airlie (1): Merge tag 'topic/dp-quirks-2017-05-31' of git://anongit.freedesktop.org/git/drm-intel into drm-fixes

Jani Nikula (4): drm/dp: add helper for reading DP sink/branch device desc from DPCD drm/i915: use drm DP helper to read DPCD desc drm/dp: start a DPCD based DP sink/branch device quirk database drm/i915: Detect USB-C specific dongles before reducing M and N

drivers/gpu/drm/drm_dp_helper.c | 83 ++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/i915/i915_drv.h | 3 +- drivers/gpu/drm/i915/intel_display.c | 22 ++++++---- drivers/gpu/drm/i915/intel_dp.c | 45 +++++-------------- drivers/gpu/drm/i915/intel_dp_mst.c | 5 ++- drivers/gpu/drm/i915/intel_drv.h | 13 +----- drivers/gpu/drm/i915/intel_lspcon.c | 2 +- include/drm/drm_dp_helper.h | 51 ++++++++++++++++++++++ 8 files changed, 166 insertions(+), 58 deletions(-)