The mt8188 SoC provides an HDMI encoder and PHY fed through the DPI1 interface attached to the vdosys1 display data path.
Add the U-Boot specific bits to mt8390-genio-common-u-boot.dtsi: - a "memory-region" phandle on the hdmi node pointing at the framebuffer reserved-memory region; - aliases for the pipeline resources that have no upstream alias (the vdosys1 syscon and the larb2/larb3 SMI larbs), which the video driver resolves directly since U-Boot has no DRM framework to walk the graph. Signed-off-by: Julien Stephan <[email protected]> --- arch/arm/dts/mt8390-genio-common-u-boot.dtsi | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) diff --git a/arch/arm/dts/mt8390-genio-common-u-boot.dtsi b/arch/arm/dts/mt8390-genio-common-u-boot.dtsi index 95b2f66973c..9485315b79b 100644 --- a/arch/arm/dts/mt8390-genio-common-u-boot.dtsi +++ b/arch/arm/dts/mt8390-genio-common-u-boot.dtsi @@ -5,6 +5,18 @@ */ / { + /* + * U-Boot specific: the video driver looks up every pipeline component + * by alias. These resources have no upstream alias, so add one here: + * the vdosys1 syscon (whose register block holds the display routing + * muxes) and the SMI larbs feeding the display data path. + */ + aliases { + larb2 = &larb2; + larb3 = &larb3; + vdosys1 = &vdosys1; + }; + reserved-memory { /* * Keep these regions clear of the board reserved-memory @@ -24,3 +36,8 @@ }; }; }; + +&hdmi { + /* U-Boot specific: the framebuffer lives in this reserved region */ + memory-region = <&framebuffer>; +}; -- 2.54.0
