arm64: dts: qcom: sc7180-trogdor: Move panel under the bridge chip

Putting the panel under the bridge chip (under the aux-bus node)
allows the panel driver to get access to the DP AUX bus, enabling all
sorts of fabulous new features.

While we're at this, get rid of a level of hierarchy for the panel
node. It doesn't need "ports / port" and can just have a "port" child.

For Linux, this patch has a hard requirement on the patches adding DP
AUX bus support to the ti-sn65dsi86 bridge chip driver. See the patch
("drm/bridge: ti-sn65dsi86: Add support for the DP AUX bus").

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210611101711.v10.11.Ibdb7735fb1844561b902252215a69526a14f9abd@changeid

diff --git a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
index 24d293e..c76afd8 100644 (file)
--- a/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
+++ b/arch/arm64/boot/dts/qcom/sc7180-trogdor.dtsi
@@ -260,21 +260,6 @@
                #sound-dai-cells = <0>;
        };
 
-       panel: panel {
-               /* Compatible will be filled in per-board */
-               power-supply = <&pp3300_dx_edp>;
-               backlight = <&backlight>;
-               hpd-gpios = <&sn65dsi86_bridge 2 GPIO_ACTIVE_HIGH>;
-
-               ports {
-                       port {
-                               panel_in_edp: endpoint {
-                                       remote-endpoint = <&sn65dsi86_out>;
-                               };
-                       };
-               };
-       };
-
        pwmleds {
                compatible = "pwm-leds";
                keyboard_backlight: keyboard-backlight {
@@ -674,6 +659,21 @@ edp_brij_i2c: &i2c2 {
                                };
                        };
                };
+
+               aux-bus {
+                       panel: panel {
+                               /* Compatible will be filled in per-board */
+                               power-supply = <&pp3300_dx_edp>;
+                               backlight = <&backlight>;
+                               hpd-gpios = <&sn65dsi86_bridge 2 GPIO_ACTIVE_HIGH>;
+
+                               port {
+                                       panel_in_edp: endpoint {
+                                               remote-endpoint = <&sn65dsi86_out>;
+                                       };
+                               };
+                       };
+               };
        };
 };