Driver changes mainly to process the request coming from Test equipment as short pulse hpd interrupt to change link-pattern/v-swing/pre-emphasis Complete auto test suite takes much lesser time than manual run. Overall design: -------------- Automate test request will come to source device as HDP short pulse interrupt from test scope. Read DPCD 0x201, Check for bit 1 for automated test request. If set continue and read DPCD 0x218. Check for bit 3 for phy test pattern, If set continue. Get the requested test pattern through DPCD 0x248. Compute requested voltage swing level and pre-emphasis level from DPCD 0x206 and 0x207 Set signal level through vswing programming sequence. Write DDI_COMP_CTL and DDI_COMP_PATx as per requested pattern. Configure the link and write the new test pattern through DPCD. High level patch description. ----------------------------- patch 1: Align macro name as per DP spec.. patch 2: drm level api added to get/set test pattern as per vesa DP spec. This maybe useful for other driver so added in drm layer. patch 3: vswing/preemphasis adjustment calculation is needed during phy compliance request processing along with existing link training process, so moved the same function in intel_dp.c. patch 4: Preparation for auto phy compliance test scope request. patch 5: Added debugfs entry for phy compliance. patch 6: Register difnition of DP compliance register added. patch 7: This patch os mainly processing the request. Complete phy compliance test suite executed and received positive result. v1: Redesigned the code as per review feedback from Manasi on RFC. v2: Addressed review comments from Manasi. v3: Addressed review commnets from Harry, Ville, Jani. v4: Had design closure and added fixes after complete test-run. (Thanks to Khaled/Manasi/Clint for fixes and test execution) v5: Fixed some nitpicks by Manasi. Animesh Manna (7): drm/amd/display: Align macro name as per DP spec drm/dp: get/set phy compliance pattern drm/i915/dp: Made intel_dp_adjust_train() non-static drm/i915/dp: Preparation for DP phy compliance auto test drm/i915/dp: Add debugfs entry for DP phy compliance drm/i915/dp: Register definition for DP compliance register drm/i915/dp: Program vswing, pre-emphasis, test-pattern .../gpu/drm/amd/display/dc/core/dc_link_dp.c | 2 +- drivers/gpu/drm/drm_dp_helper.c | 94 ++++++++++ .../drm/i915/display/intel_display_debugfs.c | 12 +- .../drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_dp.c | 171 ++++++++++++++++++ drivers/gpu/drm/i915/display/intel_dp.h | 1 + .../drm/i915/display/intel_dp_link_training.c | 9 +- .../drm/i915/display/intel_dp_link_training.h | 4 + drivers/gpu/drm/i915/i915_reg.h | 20 ++ include/drm/drm_dp_helper.h | 33 +++- 10 files changed, 339 insertions(+), 8 deletions(-) -- 2.24.0 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
