This addresses all the review comments from the earlier patch series: https://patchwork.freedesktop.org/series/15771/
DP 1.2 compliance testing can be acheived using DPR-120's CTS suite. This compliance unit sends a short pulse to initiate link training and video pattern generation compliance tests and sends a long pulse to initate EDID compliance tests. It also sets the AUTOMATED TEST REQUEST bit in Device IRQ to 1. These patches add support in the kernel to respond to these test requests sent by DPR-120. The test handler has been added for Link training/EDID and Video pattern compliance tests that gets invoked on short/long pulse sent by DPR-120. The test handler for each of the tests reads the corresponding DPCD registers to read the test parameters.
These tests need to be run with the IGT DP compliance automation tool. Link Training Tests (4.3.1.1 - 4.3.2.3): It reads the DPCD registers to get the link rate and lane count requested by test and sends a hotplug uevent for the userspace to redo a modeset in order to train the link at the requested test parameters.
EDID Tests (4.2.2.3 - 4.2.2.6): It reads the EDID set by the DPR-120, if EDID read succeeds, it sets the video mode to PREFERRED and sets the test_active flag. This flag wakes up the IGT compliance tool that then fills the framebuffers and triggers a modeset.
Video Pattern Tests (4.3.3.1): It reads the DPCD registers to set the requested video pattern parameters. It then sets the test active flag that wakes up the IGT tool, userspace reads the video pattern values from corresponding debugfs files and fills the framebuffers and triggers a modeset.
Manasi Navare (5): drm/i915: Move all the DP compliance data to a separate struct drm/i915: Add support for DP link training compliance drm/i915: Fixes to support DP Compliance EDID tests drm: Add definitions for DP compliance Video pattern tests drm/i915: Add support for DP Video pattern compliance tests
drivers/gpu/drm/i915/i915_debugfs.c | 22 ++++-- drivers/gpu/drm/i915/intel_dp.c | 153 +++++++++++++++++++++++++++++++----- drivers/gpu/drm/i915/intel_dp_mst.c | 7 +- drivers/gpu/drm/i915/intel_drv.h | 19 ++++- include/drm/drm_dp_helper.h | 58 ++++++++++++++ 5 files changed, 232 insertions(+), 27 deletions(-)