raspberry pi: fix regression in display output due to new power driver
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From 9d1a8ad3c56f4e84a0ec46246b4c08a6d139f638 Mon Sep 17 00:00:00 2001
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From: Peter Robinson <pbrobinson@gmail.com>
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Date: Sun, 13 Oct 2019 14:33:23 +0100
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Subject: [PATCH] Revert "ARM: bcm283x: Switch V3D over to using the PM driver
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instead of firmware."
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Since release of the new BCM2835 PM driver there has been several reports
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of V3D probing issues. This is caused by timeouts during powering-up the
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GRAFX PM domain:
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bcm2835-power: Timeout waiting for grafx power OK
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I was able to reproduce this reliable on my Raspberry Pi 3B+ after setting
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force_turbo=1 in the firmware configuration. Since there are no issues
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using the firmware PM driver with the same setup, there must be an issue
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in the BCM2835 PM driver.
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Unfortunately there hasn't been much progress in identifying the root cause
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since June (mostly in the lack of documentation), so i decided to switch
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back until the issue in the BCM2835 PM driver is fixed.
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Link: https://github.com/raspberrypi/linux/issues/3046
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Fixes: e1dc2b2e1bef (" ARM: bcm283x: Switch V3D over to using the PM driver instead of firmware.")
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Cc: stable@vger.kernel.org
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Signed-off-by: Stefan Wahren <wahrenst@gmx.net>
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Acked-by: Eric Anholt <eric@anholt.net>
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---
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a/arch/arm/boot/dts/bcm2835-rpi.dtsi | 4 ++++
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b/arch/arm/boot/dts/bcm283x.dtsi | 4 +---
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2 files changed, 5 insertions(+), 3 deletions(-)
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diff --git a/arch/arm/boot/dts/bcm2835-rpi.dtsi b/arch/arm/boot/dts/bcm2835-rpi.dtsi
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index 715d50c64529..d136867c317f 100644
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--- a/arch/arm/boot/dts/bcm2835-rpi.dtsi
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+++ b/arch/arm/boot/dts/bcm2835-rpi.dtsi
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@@ -90,6 +90,10 @@
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status = "okay";
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};
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+&v3d {
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+ power-domains = <&power RPI_POWER_DOMAIN_V3D>;
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+};
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+
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&vec {
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power-domains = <&power RPI_POWER_DOMAIN_VEC>;
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status = "okay";
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diff --git a/arch/arm/boot/dts/bcm283x.dtsi b/arch/arm/boot/dts/bcm283x.dtsi
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index 4b21ddb26aa5..0c6a6611f285 100644
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--- a/arch/arm/boot/dts/bcm283x.dtsi
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+++ b/arch/arm/boot/dts/bcm283x.dtsi
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@@ -3,7 +3,6 @@
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#include <dt-bindings/clock/bcm2835-aux.h>
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#include <dt-bindings/gpio/gpio.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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-#include <dt-bindings/soc/bcm2835-pm.h>
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/* firmware-provided startup stubs live here, where the secondary CPUs are
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* spinning.
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@@ -121,7 +120,7 @@
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#interrupt-cells = <2>;
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};
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- pm: watchdog@7e100000 {
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+ watchdog@7e100000 {
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compatible = "brcm,bcm2835-pm", "brcm,bcm2835-pm-wdt";
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#power-domain-cells = <1>;
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#reset-cells = <1>;
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@@ -641,7 +640,6 @@
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compatible = "brcm,bcm2835-v3d";
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reg = <0x7ec00000 0x1000>;
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interrupts = <1 10>;
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- power-domains = <&pm BCM2835_POWER_DOMAIN_GRAFX_V3D>;
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};
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vc4: gpu {
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--
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2.21.0
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@ -559,8 +559,6 @@ Patch307: arm64-dts-rockchip-fix-RockPro64-vdd-log-regulator-settings.patch
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# https://patchwork.kernel.org/patch/11155461/
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Patch308: arm64-dts-rockchip-fix-Rockpro64-RK808-interrupt-line.patch
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Patch309: bcm2835-audio-Fix-draining-behavior-regression.patch
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# Tegra bits
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Patch320: arm64-tegra-jetson-tx1-fixes.patch
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# https://www.spinics.net/lists/linux-tegra/msg43110.html
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@ -578,6 +576,13 @@ Patch330: arm64-qcom-i2c-geni-Disable-DMA-processing-on-the-Lenovo-Yoga-C630.pat
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# https://patchwork.kernel.org/patch/11133293/
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Patch332: arm64-dts-qcom-Add-Lenovo-Yoga-C630.patch
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# Raspberry Pi bits
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Patch340: bcm2835-audio-Fix-draining-behavior-regression.patch
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# This is typical rpi, we have a driver but it has problems because ¯\_(ツ)_/¯ but this revert makes pictures work again.
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# https://patchwork.kernel.org/patch/11136979/
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Patch341: Revert-ARM-bcm283x-Switch-V3D-over-to-using-the-PM-driver-instead-of-firmware.patch
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# 400 - IBM (ppc/s390x) patches
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# 500 - Temp fixes/CVEs etc
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