Hello,
This patch series adds support to the mxsfb driver for bus width override. The need came from a hardware platform where a 18-bpp panel had the R[5:0], G[5:0] and B[5:0] signals connected to LCD_DATA[7:2], LCD_DATA[15:10] and LCD_DATA[23:18] instead of LCD_DATA[5:0], LCD_DATA[11:6] and LCD_DATA[17:12]. The bus width, automatically configured to 18 by querying the panel, is incorrect in this case, and needs to be set to 24.
To solve this issue, a new bus-width DT property is added to the mxsfb DT binding. Patch 1/8 first converts the binding to YAML, with a fix for the compatible string values in 2/8. Patch 3/8 then adds the new property, and 4/8 renames the binding file to fsl,lcdif.yaml to match the usual naming convention. I've kept that patch last to make it easy to drop should should mxsfb.yaml be preferred.
Patches 5/8 to 6/8 then fix the DT sources to match the LCDIF bindings, as I noticed during the conversion that the compatible strings were badly managed (see patch 2/8 for a longer explanation). Patch 7/8 drops an unused clock from DT sources.
Patch 8/8 finally adds support for the bus-width property to the mxsfb driver.
Laurent Pinchart (8): dt-bindings: display: mxsfb: Convert binding to YAML dt-bindings: display: mxsfb: Add and fix compatible strings dt-bindings: display: mxsfb: Add a bus-width endpoint property dt-bindings: display: mxsfb: Rename to fsl,lcdif.yaml ARM: dts: imx: Fix LCDIF compatible strings arm64: dts: imx8mq: Fix LCDIF compatible strings ARM: dts: imx: Remove unneeded LCDIF disp_axi clock drm: mxsfb: Add support for the bus-width DT property
.../bindings/display/fsl,lcdif.yaml | 135 ++++++++++++++++++ .../devicetree/bindings/display/mxsfb.txt | 87 ----------- MAINTAINERS | 2 +- arch/arm/boot/dts/imx6sl.dtsi | 7 +- arch/arm/boot/dts/imx6sll.dtsi | 7 +- arch/arm/boot/dts/imx6sx.dtsi | 4 +- arch/arm/boot/dts/imx6ul.dtsi | 7 +- arch/arm64/boot/dts/freescale/imx8mq.dtsi | 2 +- drivers/gpu/drm/mxsfb/mxsfb_drv.c | 26 ++++ drivers/gpu/drm/mxsfb/mxsfb_drv.h | 2 + drivers/gpu/drm/mxsfb/mxsfb_kms.c | 8 +- 11 files changed, 182 insertions(+), 105 deletions(-) create mode 100644 Documentation/devicetree/bindings/display/fsl,lcdif.yaml delete mode 100644 Documentation/devicetree/bindings/display/mxsfb.txt