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Display Subsystem:(default FBdev)
Steps switch to DRM:
1、Disable fbdev,close below config items：
CONFIG_FB_STARFIVE=y
CONFIG_FB_STARFIVE_HDMI_TDA998X=y
CONFIG_FB_STARFIVE_VIDEO=y
2、open DRM hdmi pipeline,enable items:
CONFIG_DRM_I2C_NXP_TDA998X=y
CONFIG_DRM_I2C_NXP_TDA9950=y
CONFIG_DRM_STARFIVE=y
CONFIG_FRAMEBUFFER_CONSOLE=y
Precautions：when use DRM hdmi pipeline,please make sure CONFIG_DRM_STARFIVE_MIPI_DSI is disable ,
or will cause color abnormal.
3、open DRM mipi pipeline
enable items:
CONFIG_PHY_M31_DPHY_RX0=y
CONFIG_DRM_STARFIVE_MIPI_DSI=y
change jh7100.dtsi display-encoder as below：
display-encoder {
compatible = "starfive,display-encoder";
encoder-type = <6>; //2-TMDS, 3-LVDS, 6-DSI, 8-DPI
status = "okay";
ports {
port@0 {
endpoint {
remote-endpoint = <&dsi_out_port>;
};
};
port@1 {
endpoint {
remote-endpoint = <&crtc_0_out>;
};
};
};
};
install libdrm:
make buildroot_initramfs-menuconfig
choose:
BR2_PACKAGE_LIBDRM=y
BR2_PACKAGE_LIBDRM_RADEON=y
BR2_PACKAGE_LIBDRM_AMDGPU=y
BR2_PACKAGE_LIBDRM_NOUVEAU=y
BR2_PACKAGE_LIBDRM_ETNAVIV=y
BR2_PACKAGE_LIBDRM_INSTALL_TESTS=y
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