This patchset adds the missing pieces to make the Freescale DCU DRM driver work on Freescale Vybrid.
Foremost, it adds support for the timing controller (TCON) module. The module is between the Display Controller and the actual output pins. It allows to alter the timings for RAW TFT displays, but can also operate in a bypass mode. This change has only support for the bypass mode.
Earlier variants of the DCU DRM driver configured the TCON module in bypass mode, however this has been removed and postponed. The last variant with the TCON code was v9: https://lkml.org/lkml/2015/7/13/242
The patchset also fixes the DCU related clocks in the Vybrid clock tree and makes use of the common clock framework for the pixelclock divider.
Testing on LS1021a welcome!
Changes since v2: - Add second clock ("pix") to ls1021a.dtsi too - Updated documentation regarding clocks - Do not warn if TCON is missing as some device do not provide it - Allocate memory after checking for TCON node and return -ENOMEM if memory allocation fails - Add fsl,tcon.txt to MAINTAINERS file
Changes since v1: - Properly disable clocks on errors - Create clear seperation of pixel clock and bus clock - Simplified TCON driver by removing suspend/resume capabilities (encoder disable/enable makes sure that TCON bypass gets disabled/reenabled on suspend) - Use common clock framework to create a divider clock which represents the DCU internal pixel clock divider
Stefan Agner (9): ARM: imx: clk-vf610: fix DCU clock tree ARM: imx: clk-vf610: add TCON ipg clock drm/fsl-dcu: disable clock on initialization failure and remove drm/fsl-dcu: add extra clock for pixel clock drm/fsl-dcu: use common clock framework for pixel clock divider drm/fsl-dcu: add TCON driver ARM: dts: vf610: add display nodes ARM: dts: vf610-colibri: enable display controller ARM: dts: ls1021a: add pix clock to DCU dts node
.../devicetree/bindings/display/fsl,dcu.txt | 15 ++- .../devicetree/bindings/display/fsl,tcon.txt | 18 ++++ MAINTAINERS | 1 + arch/arm/boot/dts/ls1021a.dtsi | 5 +- arch/arm/boot/dts/vf-colibri-eval-v3.dtsi | 16 +++ arch/arm/boot/dts/vf-colibri.dtsi | 33 ++++++ arch/arm/boot/dts/vfxxx.dtsi | 19 ++++ drivers/clk/imx/clk-vf610.c | 7 +- drivers/gpu/drm/fsl-dcu/Makefile | 3 +- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_crtc.c | 7 +- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 73 ++++++++++---- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.h | 2 + drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_rgb.c | 11 ++ drivers/gpu/drm/fsl-dcu/fsl_tcon.c | 111 +++++++++++++++++++++ drivers/gpu/drm/fsl-dcu/fsl_tcon.h | 33 ++++++ include/dt-bindings/clock/vf610-clock.h | 4 +- 16 files changed, 323 insertions(+), 35 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/fsl,tcon.txt create mode 100644 drivers/gpu/drm/fsl-dcu/fsl_tcon.c create mode 100644 drivers/gpu/drm/fsl-dcu/fsl_tcon.h