100 lines
3.8 KiB
Diff
100 lines
3.8 KiB
Diff
From 281a7c187be47b4f471b5770f41c8c72e3989f02 Mon Sep 17 00:00:00 2001
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From: The-going <48602507+The-going@users.noreply.github.com>
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Date: Sun, 23 Jan 2022 22:32:07 +0300
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Subject: [PATCH 068/170] arm:dts:sun7i-a20 Disable OOB IRQ for brcm-wifi on
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Cubietruck and Banana-Pro
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While doing some brcmfmac driver work I needed to test this also on some
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devicetree based boards. So I fired up the good old Cubietruck and when
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that would not work a Banana Pro.
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With an unmodified 4.17 kernel both boards intermittently would come up
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with non working wifi with the following errors:
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brcmfmac: brcmf_sdio_bus_rxctl: resumed on timeout
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brcmfmac: brcmf_bus_started: failed: -110
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brcmfmac: brcmf_attach: dongle is not responding: err=-110
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brcmfmac: brcmf_sdio_firmware_callback: brcmf_attach failed
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They would come up this way more often then with actual working wifi,
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once this problem happens it seems to require a power-cycle to fix.
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Once things work one can safely reboot without hitting the issue.
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I've found that disabling OOB interrupts fixes this. This really is more
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of a workaround then a proper fix, but it makes the wifi reliable again
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and it does not have much of a downside.
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Using an OOB IRQ instead of the sdio-IRQ mechanism is mostly important to
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allow the MMC controller to go into runtime-suspend which is not really an
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issue on these boards since they are (usually) not battery powered.
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I've looked at recent brcmfmac and mmc-core changes which may explain this
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and I've not found anything. So the most likely culprit is the A20 external
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interrupt handling e.g. perhaps it is set to edge instead of level? Either
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way I do not have time to further investigate this.
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BugLink: https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=908438
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Signed-off-by: Hans de Goede <hdegoede@redhat.com>
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---
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arch/arm/boot/dts/sun7i-a20-bananapro.dts | 16 +++++++++++++---
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arch/arm/boot/dts/sun7i-a20-cubietruck.dts | 16 +++++++++++++---
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2 files changed, 26 insertions(+), 6 deletions(-)
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diff --git a/arch/arm/boot/dts/sun7i-a20-bananapro.dts b/arch/arm/boot/dts/sun7i-a20-bananapro.dts
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index e22f0e8bb..e68748076 100644
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--- a/arch/arm/boot/dts/sun7i-a20-bananapro.dts
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+++ b/arch/arm/boot/dts/sun7i-a20-bananapro.dts
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@@ -162,9 +162,19 @@ &mmc3 {
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brcmf: wifi@1 {
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reg = <1>;
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compatible = "brcm,bcm4329-fmac";
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- interrupt-parent = <&pio>;
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- interrupts = <7 15 IRQ_TYPE_LEVEL_LOW>;
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- interrupt-names = "host-wake";
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+ /*
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+ * OOB interrupt support is broken ATM, often the first irq
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+ * does not get seen resulting in the drv probe failing with:
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+ *
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+ * brcmfmac: brcmf_sdio_bus_rxctl: resumed on timeout
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+ * brcmfmac: brcmf_bus_started: failed: -110
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+ * brcmfmac: brcmf_attach: dongle is not responding: err=-110
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+ * brcmfmac: brcmf_sdio_firmware_callback: brcmf_attach failed
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+ *
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+ * interrupt-parent = <&pio>;
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+ * interrupts = <7 15 IRQ_TYPE_LEVEL_LOW>;
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+ * interrupt-names = "host-wake";
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+ */
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};
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};
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diff --git a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
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index 52160e368..525cb7fcc 100644
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--- a/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
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+++ b/arch/arm/boot/dts/sun7i-a20-cubietruck.dts
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@@ -213,9 +213,19 @@ &mmc3 {
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brcmf: wifi@1 {
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reg = <1>;
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compatible = "brcm,bcm4329-fmac";
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- interrupt-parent = <&pio>;
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- interrupts = <7 10 IRQ_TYPE_LEVEL_LOW>; /* PH10 / EINT10 */
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- interrupt-names = "host-wake";
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+ /*
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+ * OOB interrupt support is broken ATM, often the first irq
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+ * does not get seen resulting in the drv probe failing with:
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+ *
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+ * brcmfmac: brcmf_sdio_bus_rxctl: resumed on timeout
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+ * brcmfmac: brcmf_bus_started: failed: -110
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+ * brcmfmac: brcmf_attach: dongle is not responding: err=-110
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+ * brcmfmac: brcmf_sdio_firmware_callback: brcmf_attach failed
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+ *
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+ * interrupt-parent = <&pio>;
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+ * interrupts = <7 10 IRQ_TYPE_LEVEL_LOW>;
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+ * interrupt-names = "host-wake";
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+ */
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};
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};
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--
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2.35.3
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