[PATCH v3 0/3] add LG panel to dpcd quirk database

[Clint Taylor]

On 09/11/2018 01:56 AM, Lee, Shawn C wrote:
> Only specific N value (0x8000) would be acceptable for LG
> LP140WF6-SPM1 eDP panel which is running at asynchronous
> clock mode. With the other N value, it will enter BITS mode
> and display black screen. This patch series set constant N
> value for specific sink/branch device that would cover
> similar issue.
>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Cooper Chiou <cooper.chiou at intel.com>
> Cc: Matt Atwood <matthew.s.atwood at intel.com>
> Cc: Maarten Lankhorst <maarten.lankhorst at linux.intel.com>
> Cc: Dhinakaran Pandiyan <dhinakaran.pandiyan at intel.com>
> Cc: Clint Taylor <clinton.a.taylor at intel.com>
>
> Lee, Shawn C (3):
>    drm: Add support for device_id based detection.
>    drm: Change limited M/N quirk to constant N quirk.
>    drm: add LG eDP panel to quirk database
>
>   drivers/gpu/drm/drm_dp_helper.c      | 17 ++++++++++++++++-
>   drivers/gpu/drm/i915/intel_display.c | 28 +++++++++++++---------------
>   drivers/gpu/drm/i915/intel_display.h |  2 +-
>   drivers/gpu/drm/i915/intel_dp.c      |  8 ++++----
>   drivers/gpu/drm/i915/intel_dp_mst.c  |  6 +++---
>   include/drm/drm_dp_helper.h          |  6 +++---
>   6 files changed, 40 insertions(+), 27 deletions(-)
>

Tested quirk on Analogix 7737 based USB_C->HDMI dongle that the original 
Limited M/N quirk was designed around. New quirk appears to work correctly.

-Clint