Hello,
This patch series adds support for Atmel HLCDC (High LCD Controller) available on some Atmel SoCs (i.e. the sama5d3 family).
The HLCDC actually provides a Display Controller and a PWM device, hence I decided to declare an MFD device that exposes 2 subdevices: a display controller and a PWM chip. This also solves a circular dependency issue preventing HLCDC driver from unloading. The HLCDC request a drm_panel device, which request a backlight device (a PWM backlight), which depends on a PWM which is provided by the HLCDC driver (hlcdc -> panel -> backlight -> hlcdc (pwm part)).
The current implementation only support sama5d3 SoCs but other SoCs should be easily ported by defining new compatible strings and adding HLCDC description structures for these SoCs.
The drivers supports basic CRTC functionalities, several overlays and an hardware cursor.
It alse supports several RGB format on all planes and some YUV formats on the HEO overlay plane, though YUV formats have not been tested yet.
Best Regards,
Boris
Changes since v1: - replace the backlight driver by a PWM driver - make use of drm_panel infrastructure - split driver code in several subsystem: MFD, PWM and DRM - add support for overlays - add support for hardware cursor
Boris BREZILLON (7): mfd: add atmel-hlcdc driver pwm: add support for atmel-hlcdc-pwm device drm: add Atmel HLCDC Display Controller support ARM: AT91/dt: split sama5d3 lcd pin definitions to match RGB mode configs ARM: at91/dt: define the HLCDC node available on sama5d3 SoCs ARM: at91/dt: add LCD panel description to sama5d3xdm.dtsi ARM: at91/dt: enable the LCD panel on sama5d3xek boards
.../devicetree/bindings/drm/atmel-hlcdc-dc.txt | 59 ++ .../devicetree/bindings/mfd/atmel-hlcdc.txt | 41 ++ .../devicetree/bindings/pwm/atmel-hlcdc-pwm.txt | 40 ++ arch/arm/boot/dts/sama5d31ek.dts | 24 + arch/arm/boot/dts/sama5d33ek.dts | 24 + arch/arm/boot/dts/sama5d34ek.dts | 24 + arch/arm/boot/dts/sama5d36ek.dts | 24 + arch/arm/boot/dts/sama5d3_lcd.dtsi | 153 ++++- arch/arm/boot/dts/sama5d3xdm.dtsi | 32 + drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/atmel-hlcdc/Kconfig | 11 + drivers/gpu/drm/atmel-hlcdc/Makefile | 7 + drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c | 529 ++++++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c | 477 ++++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h | 178 ++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c | 701 +++++++++++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h | 417 ++++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_panel.c | 351 +++++++++++ drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c | 658 +++++++++++++++++++ drivers/gpu/drm/atmel_hlcdc/Kconfig | 11 + drivers/gpu/drm/atmel_hlcdc/Makefile | 8 + drivers/mfd/Kconfig | 11 + drivers/mfd/Makefile | 1 + drivers/mfd/atmel-hlcdc.c | 116 ++++ drivers/pwm/Kconfig | 9 + drivers/pwm/Makefile | 1 + drivers/pwm/pwm-atmel-hlcdc.c | 216 +++++++ include/linux/mfd/atmel-hlcdc.h | 78 +++ 29 files changed, 4173 insertions(+), 31 deletions(-) create mode 100644 Documentation/devicetree/bindings/drm/atmel-hlcdc-dc.txt create mode 100644 Documentation/devicetree/bindings/mfd/atmel-hlcdc.txt create mode 100644 Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt create mode 100644 drivers/gpu/drm/atmel-hlcdc/Kconfig create mode 100644 drivers/gpu/drm/atmel-hlcdc/Makefile create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_layer.h create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_panel.c create mode 100644 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_plane.c create mode 100644 drivers/gpu/drm/atmel_hlcdc/Kconfig create mode 100644 drivers/gpu/drm/atmel_hlcdc/Makefile create mode 100644 drivers/mfd/atmel-hlcdc.c create mode 100644 drivers/pwm/pwm-atmel-hlcdc.c create mode 100644 include/linux/mfd/atmel-hlcdc.h