arm64: dts: meson-gxl-s805x: reduce initial Mali450 core frequency

When starting at 744MHz, the Mali 450 core crashes on S805X based boards:
 lima d00c0000.gpu: IRQ ppmmu3 not found
 lima d00c0000.gpu: IRQ ppmmu4 not found
 lima d00c0000.gpu: IRQ ppmmu5 not found
 lima d00c0000.gpu: IRQ ppmmu6 not found
 lima d00c0000.gpu: IRQ ppmmu7 not found
 Internal error: synchronous external abort: 96000210 [#1] PREEMPT SMP
 Modules linked in:
 CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.7.2+ #492
 Hardware name: Libre Computer AML-S805X-AC (DT)
 pstate: 40000005 (nZcv daif -PAN -UAO)
 pc : lima_gp_init+0x28/0x188
 ...
 Call trace:
  lima_gp_init+0x28/0x188
  lima_device_init+0x334/0x534
  lima_pdev_probe+0xa4/0xe4
 ...
 Kernel panic - not syncing: Attempted to kill init! exitcode=0x0000000b

Reverting to a safer 666Mhz frequency on the S805X that doesn't use the
GP0 PLL makes it more stable.

Fixes: fd47716479f5 ("ARM64: dts: add S805X based P241 board")
Fixes: 0449b8e371ac ("arm64: dts: meson: add libretech aml-s805x-ac board")
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Link: https://lore.kernel.org/r/20200618132737.14243-1-narmstrong@baylibre.com

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-libretech-ac.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-libretech-ac.dts
index 6a226faab18338f69c77c2470221454383eaf91f..9e43f4dca90dd92637527b70c7bc9c9daa87b05b 100644 (file)
--- a/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-libretech-ac.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-libretech-ac.dts
@@ -10,7 +10,7 @@
 #include <dt-bindings/input/input.h>
 #include <dt-bindings/sound/meson-aiu.h>
 
-#include "meson-gxl-s905x.dtsi"
+#include "meson-gxl-s805x.dtsi"
 
 / {
        compatible = "libretech,aml-s805x-ac", "amlogic,s805x",

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-p241.dts b/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-p241.dts
index 867e30f1d62b8d6d8ac3501e579750d0c8465e94..eb7f5a3fefd4d9e4ebb79945675701abc2ed0e04 100644 (file)
--- a/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-p241.dts
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s805x-p241.dts
@@ -9,7 +9,7 @@
 
 #include <dt-bindings/input/input.h>
 
-#include "meson-gxl-s905x.dtsi"
+#include "meson-gxl-s805x.dtsi"
 
 / {
        compatible = "amlogic,p241", "amlogic,s805x", "amlogic,meson-gxl";

diff --git a/arch/arm64/boot/dts/amlogic/meson-gxl-s805x.dtsi b/arch/arm64/boot/dts/amlogic/meson-gxl-s805x.dtsi
new file mode 100644 (file)
index 0000000..f9d7056
--- /dev/null
+++ b/arch/arm64/boot/dts/amlogic/meson-gxl-s805x.dtsi
@@ -0,0 +1,24 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2020 BayLibre SAS
+ * Author: Neil Armstrong <narmstrong@baylibre.com>
+ */
+
+#include "meson-gxl-s905x.dtsi"
+
+/ {
+       compatible = "amlogic,s805x", "amlogic,meson-gxl";
+};
+
+/* The S805X Package doesn't seem to handle the 744MHz OPP correctly */
+&mali {
+       assigned-clocks = <&clkc CLKID_MALI_0_SEL>,
+                         <&clkc CLKID_MALI_0>,
+                         <&clkc CLKID_MALI>; /* Glitch free mux */
+       assigned-clock-parents = <&clkc CLKID_FCLK_DIV3>,
+                                <0>, /* Do Nothing */
+                                <&clkc CLKID_MALI_0>;
+       assigned-clock-rates = <0>, /* Do Nothing */
+                              <666666666>,
+                              <0>; /* Do Nothing */
+};