Changes since v1: - Change the blue-and-red-wiring property to boolean blue-and-red-crossed - This breaks to little backward compatibility the earlier series had, but makes the binding more straight forward - This changes requires changes to am335x-evm and am335x-evmsk dts-files - The old beaglebone-black dts files remain compatible, but the patch suggests in commenst on how to support 24-bit RGB mode with BBB
The first patch ("drm/tilcdc: Remove drm_helper_disable_unused_functions() call") is completely independent fix.
The red and blue components are reversed between 24 and 16 bit modes on am335x LCDC output pins. To get 24 RGB format the wires red and blue wires has to be crossed and this in turn causes 16 colors output to be in BGR format. With straight wiring the 16 color is RGB and 24 bit is BGR. These patches try to deal with the issue in reasonable manner.
For more details see section 3.1.1 in AM335x Silicon Errata: http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sp...
Jyri Sarha (7): drm/tilcdc: Remove drm_helper_disable_unused_functions() call drm/tilcdc: Add blue-and-red-crossed devicetree property drm/tilcdc: Choose console BPP that supports RGB ARM: dts: am335x-boneblack: Add comments on how to support 24 bit RGB mode ARM: dts: am335x-evm: Add blue-and-red-crossed -property to lcdc node ARM: dts: am335x-evmsk: Whitespace cleanup of lcdc related nodes ARM: dts: am335x-evmsk: Add blue-and-red-crossed -property to lcdc node
.../devicetree/bindings/display/tilcdc/tilcdc.txt | 12 +++++++ arch/arm/boot/dts/am335x-boneblack.dts | 12 +++++++ arch/arm/boot/dts/am335x-evm.dts | 2 ++ arch/arm/boot/dts/am335x-evmsk.dts | 42 +++++++++++----------- drivers/gpu/drm/tilcdc/tilcdc_drv.c | 39 ++++++++++++++------ drivers/gpu/drm/tilcdc/tilcdc_drv.h | 5 ++- drivers/gpu/drm/tilcdc/tilcdc_external.c | 7 ++-- drivers/gpu/drm/tilcdc/tilcdc_external.h | 2 +- drivers/gpu/drm/tilcdc/tilcdc_panel.c | 2 -- drivers/gpu/drm/tilcdc/tilcdc_plane.c | 9 ++--- drivers/gpu/drm/tilcdc/tilcdc_tfp410.c | 2 -- 11 files changed, 87 insertions(+), 47 deletions(-)