Hi,
this series basically takes the facility for continuously capturing CRCs of frames from the i915 driver and into the DRM core.
The idea is that test suites such as IGT use this information to check that frames that are exected to be identical, also have identical CRC values.
Other drivers for hardware that can provide frame CRCs (including eDP panels that support self-refresh) can easily implement the new callback and provide userspace with the CRC values.
In this v9, there are build fixes for !CONFIG_DEBUG_FS and a fix so we don't break probing of drivers that still use the .load callback (tested on Tegra124).
Thanks,
Tomeu
Tomeu Vizoso (4): drm/i915/debugfs: Move out pipe CRC code drm: Add API for capturing frame CRCs drm/i915: Use new CRC debugfs API drm/i915: Put "cooked" vlank counters in frame CRC lines
Documentation/gpu/drm-uapi.rst | 6 + drivers/gpu/drm/Makefile | 3 +- drivers/gpu/drm/drm_crtc.c | 34 +- drivers/gpu/drm/drm_debugfs.c | 34 +- drivers/gpu/drm/drm_debugfs_crc.c | 351 ++++++++++++ drivers/gpu/drm/drm_internal.h | 16 + drivers/gpu/drm/i915/Makefile | 2 +- drivers/gpu/drm/i915/i915_debugfs.c | 886 +--------------------------- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_irq.c | 83 ++- drivers/gpu/drm/i915/intel_display.c | 1 + drivers/gpu/drm/i915/intel_drv.h | 13 + drivers/gpu/drm/i915/intel_pipe_crc.c | 1013 +++++++++++++++++++++++++++++++++ include/drm/drm_crtc.h | 41 ++ include/drm/drm_debugfs_crc.h | 73 +++ 15 files changed, 1645 insertions(+), 912 deletions(-) create mode 100644 drivers/gpu/drm/drm_debugfs_crc.c create mode 100644 drivers/gpu/drm/i915/intel_pipe_crc.c create mode 100644 include/drm/drm_debugfs_crc.h