[PATCH 0/6] Display Global Histogram
Arun R Murthy
arun.r.murthy at intel.com
Thu Sep 19 13:31:34 UTC 2024
Display histogram is a hardware functionality where a statistics for 'x'
number of frames is generated to form a histogram data. This is notified
to the user via histogram event. Compositor will then upon sensing the
histogram event will read the histogram data from KMD via crtc property.
A library can be developed to take this generated histogram as an
input and apply some algorithm to generate an Image EnhancemenT(IET).
This is further fed back to the KMD via crtc property. KMD will use this
IET as a multiplicand factor to multiply with the incoming pixels at the
end of the pipe which is then pushed onto the display.
One such library Global Histogram Enhancement(GHE) will take the histogram
as input and applied the algorithm to enhance the density and then
return the enhanced factor. This library can be located @
https://github.com/intel/ghe
The corresponding mutter changes to enable/disable histogram, read the
histogram data, communicate with the library and write the enhanced data
back to the KMD is also pushed for review at https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3873
The IGT changes for validating the histogram event and reading the
histogram is also pushed for review at https://patchwork.freedesktop.org/series/135789/
Test-with: 20240705091333.328322-1-mohammed.thasleem at intel.com
Arun R Murthy (6):
drm/i915/histogram: Add support for histogram
drm/xe: Add histogram support to Xe builds
drm/i915/histogram: histogram interrupt handling
drm/i915/histogram: Add crtc properties for global histogram
drm/i915/histogram: histogram delay counter doesnt reset
drm/i915/histogram: Histogram changes for Display 20+
drivers/gpu/drm/i915/Makefile | 1 +
drivers/gpu/drm/i915/display/intel_atomic.c | 5 +
drivers/gpu/drm/i915/display/intel_crtc.c | 169 +++++++-
drivers/gpu/drm/i915/display/intel_crtc.h | 5 +
drivers/gpu/drm/i915/display/intel_display.c | 13 +
.../gpu/drm/i915/display/intel_display_irq.c | 6 +-
.../drm/i915/display/intel_display_types.h | 15 +
.../gpu/drm/i915/display/intel_histogram.c | 365 ++++++++++++++++++
.../gpu/drm/i915/display/intel_histogram.h | 38 ++
.../drm/i915/display/intel_histogram_reg.h | 80 ++++
drivers/gpu/drm/i915/i915_reg.h | 5 +-
drivers/gpu/drm/xe/Makefile | 1 +
12 files changed, 699 insertions(+), 4 deletions(-)
create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.c
create mode 100644 drivers/gpu/drm/i915/display/intel_histogram.h
create mode 100644 drivers/gpu/drm/i915/display/intel_histogram_reg.h
--
2.25.1
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