[RFC PATCH 0/3] drm: atmel-hlcdc: clut support

From: Peter Rosin
Date: Fri Jun 16 2017 - 05:12:03 EST


This series adds support for an 8-bit clut mode in the atmel-hlcdc

For various reasons I have only tested it with the fbdev interface,
and am therefore not really sure if it works w/o patch 2 and 3.

Also, when using it with the fbdev emulation layer, something seems
to allocate the first 16 clut entries, which throws my users of
ioctl(fb, FBIOPUTCMAP, ...) when index 0 in the given clut is
really pixel value 16. If anyone can shed some light on that, I'd
be most greatful!

Further, I suspect I might need to lock the crtc state when accessing
it in patch 3/3?


Peter Rosin (3):
atmel-hlcdc: add support for 8-bit color lookup table mode
drm/fb-cma-helper: expose more of fb cma guts
atmel-hlcdc: add clut support for legacy fbdev

drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 97 +++++++++++++++++++++++++
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 25 ++++++-
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 20 +++++
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 5 ++
drivers/gpu/drm/drm_fb_cma_helper.c | 55 +++++++++++---
include/drm/drm_fb_cma_helper.h | 8 +-
6 files changed, 197 insertions(+), 13 deletions(-)