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 <[email protected]> Cc: Cooper Chiou <[email protected]> Cc: Matt Atwood <[email protected]> Cc: Maarten Lankhorst <[email protected]> Cc: Dhinakaran Pandiyan <[email protected]> Cc: Clint Taylor <[email protected]> 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(-) -- 2.7.4 _______________________________________________ Intel-gfx mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/intel-gfx
