I've compiled the mainline 4.15rc2 kernel with the patch below for the
bananapi's DTS (ported from the patch that was applied for the
cubietruck), but when I boot the sun4i-drm module is not loaded.
My kernel config is based on that Debian's, with most things compiled as
modules:
% grep -i sun4i .config
CONFIG_MACH_SUN4I=y
CONFIG_CAN_SUN4I=m
CONFIG_SUN4I_EMAC=m
CONFIG_MDIO_SUN4I=y
CONFIG_KEYBOARD_SUN4I_LRADC=m
CONFIG_TOUCHSCREEN_SUN4I=m
CONFIG_SERIO_SUN4I_PS2=m
CONFIG_SPI_SUN4I=m
CONFIG_PINCTRL_SUN4I_A10=y
CONFIG_MFD_SUN4I_GPADC=m
CONFIG_DRM_SUN4I=m
CONFIG_DRM_SUN4I_HDMI=m
CONFIG_DRM_SUN4I_HDMI_CEC=y
CONFIG_DRM_SUN4I_BACKEND=m
CONFIG_SND_SUN4I_CODEC=m
CONFIG_SND_SUN4I_I2S=m
CONFIG_SND_SUN4I_SPDIF=m
CONFIG_DMA_SUN4I=y
CONFIG_SUN4I_A10_CCU=y
CONFIG_SUN4I_TIMER=y
CONFIG_SUN4I_GPADC=m
CONFIG_PWM_SUN4I=m
CONFIG_PHY_SUN4I_USB=m
CONFIG_CRYPTO_DEV_SUN4I_SS=m
CONFIG_CRYPTO_DEV_SUN4I_SS_PRNG=y
%
I can `modprobe sun4i_drm` but that gives me nothing in `dmesg` and
while /sys/class/drm exists, it remains sadly empty (my BananaPi is
connected via HDMI to a screen where I do get a framebuffer console but
it's presumably still using the simplefb code).
Is there something missing in my kernel config? Or DTS? Or do I need
to do something else/more than loading sun4i0-drm? Or did I just
slaughter the wrong goat?
Stefan
index 88a1c2363c6c..45da8a282288 100644
--- a/arch/arm/boot/dts/sun7i-a20-bananapi.dts
+++ b/arch/arm/boot/dts/sun7i-a20-bananapi.dts
@@ -63,6 +63,17 @@
stdout-path = "serial0:115200n8";
};
+ hdmi-connector {
+ compatible = "hdmi-connector";
+ type = "a";
+
+ port {
+ hdmi_con_in: endpoint {
+ remote-endpoint = <&hdmi_out_con>;
+ };
+ };
+ };
+
leds {
compatible = "gpio-leds";
pinctrl-names = "default";
@@ -109,6 +120,10 @@
>;
};
+&de {
+ status = "okay";
+};
+
&ehci0 {
status = "okay";
};
@@ -130,6 +145,16 @@
};
};
+&hdmi {
+ status = "okay";
+};
+
+&hdmi_out {
+ hdmi_out_con: endpoint {
+ remote-endpoint = <&hdmi_con_in>;
+ };
+};
+
&i2c0 {
pinctrl-names = "default";
pinctrl-0 = <&i2c0_pins_a>;
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