Hi all,
A long outstanding issue with the DRM subsystem has been the lack of
support for low-color displays, as used typically on older desktop
systems, and on small embedded displays.
This patch series adds support for color-indexed frame buffer formats
with 2, 4, and 16 colors. It has been tested on ARAnyM using a
work-in-progress Atari DRM driver.
Changes compared to v1:
- SMPTE color LUT accuracy,
- Factor out smpte color LUT,
- Restructure patches,
- Improve descriptions.
- Store number of colors for indexed formats,
- Add SMPTE pattern support for the C1 and C2 formats.
Please refer to [2] for related Linux DRM patches and background
information.
Thanks for your comments!
[1] "[PATCH libdrm 0/3] Add support for low-color frame buffer formats"
https://lore.kernel.org/r/cover.1646683737.git.geert@xxxxxxxxxxxxxx
[2] "[PATCH v3 00/10] drm: Add support for low-color frame buffer formats"
https://lore.kernel.org/r/cover.1657294931.git.geert@xxxxxxxxxxxxxx
Geert Uytterhoeven (10):
util: Improve SMPTE color LUT accuracy
util: Factor out and optimize C8 SMPTE color LUT
[RFC] drm_fourcc: Add DRM_FORMAT_C[124]
util: Add support for DRM_FORMAT_C[124]
util: Store number of colors for indexed formats
util: Add SMPTE pattern support for C4 format
util: Add SMPTE pattern support for C1 format
util: Add SMPTE pattern support for C2 format
modetest: Add support for DRM_FORMAT_C[124]
modetest: Add SMPTE pattern support for C4 format
include/drm/drm_fourcc.h | 5 +-
tests/modetest/buffers.c | 15 ++
tests/modetest/modetest.c | 9 +-
tests/util/format.c | 5 +-
tests/util/format.h | 1 +
tests/util/pattern.c | 416 ++++++++++++++++++++++++++++++++++----
tests/util/pattern.h | 2 +-
7 files changed, 409 insertions(+), 44 deletions(-)
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2.25.1
