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Subject[PATCH] ARM: dts: bcm283x: Use firmware PM driver for V3D
Date
The register based driver turned out to be unstable, specially on RPi3a+
but not limited to it. While a fix is being worked on, we roll back to
using firmware based scheme.

Fixes: e1dc2b2e1bef ("ARM: bcm283x: Switch V3D over to using the PM driver instead of firmware")
Signed-off-by: Nicolas Saenz Julienne <nsaenzjulienne@suse.de>
---

See https://github.com/raspberrypi/linux/issues/3046 for more reference.
Note: I tested this on RPi3b, RPi3a+ and RPi2b.

arch/arm/boot/dts/bcm2835-common.dtsi | 1 -
arch/arm/boot/dts/bcm2835-rpi-common.dtsi | 12 ++++++++++++
arch/arm/boot/dts/bcm2835.dtsi | 1 +
arch/arm/boot/dts/bcm2836.dtsi | 1 +
arch/arm/boot/dts/bcm2837.dtsi | 1 +
5 files changed, 15 insertions(+), 1 deletion(-)
create mode 100644 arch/arm/boot/dts/bcm2835-rpi-common.dtsi

diff --git a/arch/arm/boot/dts/bcm2835-common.dtsi b/arch/arm/boot/dts/bcm2835-common.dtsi
index 2b1d9d4c0cde..4119271c979d 100644
--- a/arch/arm/boot/dts/bcm2835-common.dtsi
+++ b/arch/arm/boot/dts/bcm2835-common.dtsi
@@ -130,7 +130,6 @@ v3d: v3d@7ec00000 {
compatible = "brcm,bcm2835-v3d";
reg = <0x7ec00000 0x1000>;
interrupts = <1 10>;
- power-domains = <&pm BCM2835_POWER_DOMAIN_GRAFX_V3D>;
};

vc4: gpu {
diff --git a/arch/arm/boot/dts/bcm2835-rpi-common.dtsi b/arch/arm/boot/dts/bcm2835-rpi-common.dtsi
new file mode 100644
index 000000000000..b78a57534611
--- /dev/null
+++ b/arch/arm/boot/dts/bcm2835-rpi-common.dtsi
@@ -0,0 +1,12 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This include file covers the common peripherals and configuration between
+ * bcm2835, bcm2836 and bcm2837 implementations that interact with RPi's
+ * firmware interface.
+ */
+
+#include <dt-bindings/power/raspberrypi-power.h>
+
+&v3d {
+ power-domains = <&power RPI_POWER_DOMAIN_V3D>;
+};
diff --git a/arch/arm/boot/dts/bcm2835.dtsi b/arch/arm/boot/dts/bcm2835.dtsi
index 53bf4579cc22..0549686134ea 100644
--- a/arch/arm/boot/dts/bcm2835.dtsi
+++ b/arch/arm/boot/dts/bcm2835.dtsi
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include "bcm283x.dtsi"
#include "bcm2835-common.dtsi"
+#include "bcm2835-rpi-common.dtsi"

/ {
compatible = "brcm,bcm2835";
diff --git a/arch/arm/boot/dts/bcm2836.dtsi b/arch/arm/boot/dts/bcm2836.dtsi
index 82d6c4662ae4..b390006aef79 100644
--- a/arch/arm/boot/dts/bcm2836.dtsi
+++ b/arch/arm/boot/dts/bcm2836.dtsi
@@ -1,6 +1,7 @@
// SPDX-License-Identifier: GPL-2.0
#include "bcm283x.dtsi"
#include "bcm2835-common.dtsi"
+#include "bcm2835-rpi-common.dtsi"

/ {
compatible = "brcm,bcm2836";
diff --git a/arch/arm/boot/dts/bcm2837.dtsi b/arch/arm/boot/dts/bcm2837.dtsi
index 9e95fee78e19..0199ec98cd61 100644
--- a/arch/arm/boot/dts/bcm2837.dtsi
+++ b/arch/arm/boot/dts/bcm2837.dtsi
@@ -1,5 +1,6 @@
#include "bcm283x.dtsi"
#include "bcm2835-common.dtsi"
+#include "bcm2835-rpi-common.dtsi"

/ {
compatible = "brcm,bcm2837";
--
2.25.1
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