drm/fkms: Add clk_ignore_unused to bootargs (raspberrypi#25)

The kernel will disable clocks it knows about that aren't otherwise set. This causes fkms to hang when hdmi state machine clock is disabled. Disable that behaviour when using the fkms overlay Signed-off-by: Dom Cobley <popcornmix@gmail.com>
pelwell · Apr 21, 2023 · 473b70d · 473b70d
1 parent 55540a1
commit 473b70d
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diff --git a/arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts b/arch/arm/boot/dts/overlays/vc4-fkms-v3d-overlay.dts
@@ -37,4 +37,10 @@
 			status = "okay";
 		};
 	};
+	fragment@5 {
+		target-path = "/chosen";
+		__overlay__  {
+			bootargs = "clk_ignore_unused";
+		};
+	};
 };
diff --git a/arch/arm/boot/dts/overlays/vc4-fkms-v3d-pi4-overlay.dts b/arch/arm/boot/dts/overlays/vc4-fkms-v3d-pi4-overlay.dts
@@ -41,4 +41,10 @@
 			status = "okay";
 		};
 	};
+	fragment@5 {
+		target-path = "/chosen";
+		__overlay__  {
+			bootargs = "clk_ignore_unused";
+		};
+	};
 };