Add a driver for the Electrophoretic Display Controller found in the i.MX6 SoCs.
In combination with a driver for an EPD PMIC (like the TPS65185 or the SY7636A), it works with the EPDC found in i.MX6SLL based devices and the EPDC found in i.MX6SL devices.
Support for waveforms might be limited, there was no 4bit waveform found which works with the 6SLL but it works with the vendor waveforms of the Kobo Clara HD (6SLL), the Tolino Shine 2/3 (6SL). On the 6SL devices, also the epdc_E060SCM.fw works but not as brilliant as the vendor one.
It does not involve the PXP yet. The NXP/Freescale kernel fork uses that for rotation and mysterious waveform handling. That is not planed to be upstreamed in the first step.
Also it does not provide any special userspace API to fine-tune updates. That is also IMHO something for a second step.
Andreas Kemnade (6): dt-bindings: display: imx: Add EPDC drm: Add skeleton for EPDC driver drm: mxc-epdc: Add display and waveform initialisation drm: mxc-epdc: Add update management ARM: dts: imx6sll: add EPDC arm: dts: imx6sl: Add EPDC
.../bindings/display/imx/fsl,mxc-epdc.yaml | 159 +++ arch/arm/boot/dts/imx6sl.dtsi | 3 + arch/arm/boot/dts/imx6sll.dtsi | 9 + drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/mxc-epdc/Kconfig | 15 + drivers/gpu/drm/mxc-epdc/Makefile | 5 + drivers/gpu/drm/mxc-epdc/epdc_hw.c | 497 +++++++ drivers/gpu/drm/mxc-epdc/epdc_hw.h | 8 + drivers/gpu/drm/mxc-epdc/epdc_regs.h | 442 ++++++ drivers/gpu/drm/mxc-epdc/epdc_update.c | 1210 +++++++++++++++++ drivers/gpu/drm/mxc-epdc/epdc_update.h | 9 + drivers/gpu/drm/mxc-epdc/epdc_waveform.c | 189 +++ drivers/gpu/drm/mxc-epdc/epdc_waveform.h | 7 + drivers/gpu/drm/mxc-epdc/mxc_epdc.h | 151 ++ drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c | 373 +++++ 16 files changed, 3080 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/imx/fsl,mxc-epdc.yaml create mode 100644 drivers/gpu/drm/mxc-epdc/Kconfig create mode 100644 drivers/gpu/drm/mxc-epdc/Makefile create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_hw.c create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_hw.h create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_regs.h create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_update.c create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_update.h create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_waveform.c create mode 100644 drivers/gpu/drm/mxc-epdc/epdc_waveform.h create mode 100644 drivers/gpu/drm/mxc-epdc/mxc_epdc.h create mode 100644 drivers/gpu/drm/mxc-epdc/mxc_epdc_drv.c