[PATCH 00/11] Add HDMI support for RK3128

Alex Bee
2023-12-13T19:51:47Z

This series aims to add support for the display controller (VOP) and the
HDMI controller block of RK3128 (which is very similar to the one found in
RK3036).

The VOP part is very simple - everything we need for HDMI support is
already there. I only needed to split the output selection registers from
RK3036.
The VOP has an IOMMU attached, but it has a serious silicon bug:
Registers can only be written, but not be read. As it's not possible to use
it with the IOMMU driver in it's current state I'm not adding it here and
we have to live with CMA for now - which works fine also. Andy, maybe you
can shed a light on whether there is any way to not have to write the
registers only and hope for the best (a.k.a rockchip,skip-mmu-read). I have
it working here locally - but nothing for upstream (yet).

The inno-hdmi driver currently gets a lot of attention [0-2] and I'm
hooking in now also. I did only the bare minimum to get a correctly colored
picture and a stable signal for RK3128. I leave the cleanups to those other
series and will come back with sound/CEC support later. It shouldn't
interfere to much, only the csc-part must not get dropped completely and
the mode-check-hooks are no longer dead.

Note: Patches are based and tested on next-20231213.

[0] https://lore.kernel.org/all/20231207-kms-hdmi-connector-state-v5-0-6538e19d634d@kernel.org
[1] https://lore.kernel.org/all/20231204123315.28456-1-keith.zhao@starfivetech.com
[2] https://lore.kernel.org/all/2601b669-c570-f39d-8cf9-bff56c939912@gmail.com

Alex Bee (11):
dt-bindings: display: rockchip,inno-hdmi: Document RK3128 compatible
drm/rockchip: vop: Add output selection registers for RK312x
drm/rockchip: inno_hdmi: Fix video timing
drm/rockchip: inno_hdmi: Correctly setup HDMI quantization range
drm/rockchip: inno_hdmi: Add variant support
drm/rockchip: inno_hdmi: Add RK3128 support
drm/rockchip: inno_hdmi: Add basic mode validation
drm/rockchip: inno_hdmi: Drop custom fill_modes hook
ARM: dts: rockchip: Add display subsystem for RK3128
ARM: dts rockchip: Add HDMI node for RK3128
ARM: dts: rockchip: Enable HDMI output for XPI-3128

.../display/rockchip/rockchip,inno-hdmi.yaml | 30 ++-
.../arm/boot/dts/rockchip/rk3128-xpi-3128.dts | 29 +++
arch/arm/boot/dts/rockchip/rk3128.dtsi | 60 ++++++
drivers/gpu/drm/rockchip/inno_hdmi.c | 203 +++++++++++++++---
drivers/gpu/drm/rockchip/rockchip_vop_reg.c | 13 +-
drivers/gpu/drm/rockchip/rockchip_vop_reg.h | 3 +
6 files changed, 309 insertions(+), 29 deletions(-)

base-commit: 48e8992e33abf054bcc0bb2e77b2d43bb899212e
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2.43.0