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 supporting 2, 4, 16, and 256 colors.
Overview:
- Patch 1 optimizes the C8 SMPTE color LUT, for reuse with formats
providing less colors,
- Patch 2 introduces the new C[124] formats,
- Patch 3 adds SMPTE pattern support for the C4 format.
Note that so far there is no specific pattern support for the C1 and C2
formats.
Please refer to [1] for more information.
Thanks for your comments!
[1] "[PATCH v2 00/10] drm: Add support for low-color frame buffer formats"
https://lore.kernel.org/r/cover.1646683502.git.geert@xxxxxxxxxxxxxx
Geert Uytterhoeven (3):
util: Optimize C8 SMPTE color LUT
drm_fourcc: Add DRM_FORMAT_C[124]
util: Add SMPTE pattern support for C4 format
include/drm/drm_fourcc.h | 5 ++-
tests/modetest/buffers.c | 15 +++++++
tests/modetest/modetest.c | 13 ++++--
tests/util/format.c | 3 ++
tests/util/pattern.c | 93 +++++++++++++++++++++++++++++----------
tests/util/pattern.h | 2 +-
6 files changed, 101 insertions(+), 30 deletions(-)
--
2.25.1
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
