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Message-ID: <20181206163154.GK6707@atomide.com>
Date: Thu, 6 Dec 2018 08:31:54 -0800
From: Tony Lindgren <tony@...mide.com>
To: Russell King - ARM Linux <linux@...linux.org.uk>
Cc: linux-arm-kernel@...ts.infradead.org, linux-omap@...r.kernel.org,
netdev@...r.kernel.org
Subject: Re: OMAP4430 SDP with KS8851: very slow networking
Hi,
* Russell King - ARM Linux <linux@...linux.org.uk> [181206 13:23]:
> It looks very much like a receive problem - in that the board is not
> always aware of a packet having been received until it attempts to
> transmit (eg, in the case of TFTP, when it re-sends the ACK after a
> receive timeout, it _then_ notices that there's a packet waiting.)
>
> I'm not quite sure when this cropped up as I no longer regularly
> update and run my nightly boot tests, but I think 4.18 was fine.
Sounds like it's some gpio or PM related issue. If it's not caused
by commit b764a5863fd8 ("gpio: omap: Remove custom PM calls and
use cpu_pm instead"), then maybe the changes to probe devices
with ti-sysc interconnect target module driver caused it. Below
is a revert for mcspi that would help in that case.
Also I guess it could be caused by drivers/spi/spi-omap2-mcspi.c
changes since v4.18.
Care to post output of /sys/kernel/debug/pm_debug/count for
a working and non-working kernels?
Regards,
Tony
8< -------------------
diff --git a/arch/arm/boot/dts/omap4-l4.dtsi b/arch/arm/boot/dts/omap4-l4.dtsi
--- a/arch/arm/boot/dts/omap4-l4.dtsi
+++ b/arch/arm/boot/dts/omap4-l4.dtsi
@@ -2050,25 +2050,7 @@
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x98000 0x1000>;
-
- mcspi1: spi@0 {
- compatible = "ti,omap4-mcspi";
- reg = <0x0 0x200>;
- interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
- #address-cells = <1>;
- #size-cells = <0>;
- ti,spi-num-cs = <4>;
- dmas = <&sdma 35>,
- <&sdma 36>,
- <&sdma 37>,
- <&sdma 38>,
- <&sdma 39>,
- <&sdma 40>,
- <&sdma 41>,
- <&sdma 42>;
- dma-names = "tx0", "rx0", "tx1", "rx1",
- "tx2", "rx2", "tx3", "rx3";
- };
+ status = "disabled";
};
target-module@...00 { /* 0x4809a000, ap 51 2c.0 */
@@ -2089,20 +2071,7 @@
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0x9a000 0x1000>;
-
- mcspi2: spi@0 {
- compatible = "ti,omap4-mcspi";
- reg = <0x0 0x200>;
- interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
- #address-cells = <1>;
- #size-cells = <0>;
- ti,spi-num-cs = <2>;
- dmas = <&sdma 43>,
- <&sdma 44>,
- <&sdma 45>,
- <&sdma 46>;
- dma-names = "tx0", "rx0", "tx1", "rx1";
- };
+ status = "disabled";
};
target-module@...00 { /* 0x4809c000, ap 53 36.0 */
@@ -2290,17 +2259,7 @@
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0xb8000 0x1000>;
-
- mcspi3: spi@0 {
- compatible = "ti,omap4-mcspi";
- reg = <0x0 0x200>;
- interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
- #address-cells = <1>;
- #size-cells = <0>;
- ti,spi-num-cs = <2>;
- dmas = <&sdma 15>, <&sdma 16>;
- dma-names = "tx0", "rx0";
- };
+ status = "disabled";
};
target-module@...00 { /* 0x480ba000, ap 71 32.0 */
@@ -2321,17 +2280,7 @@
#address-cells = <1>;
#size-cells = <1>;
ranges = <0x0 0xba000 0x1000>;
-
- mcspi4: spi@0 {
- compatible = "ti,omap4-mcspi";
- reg = <0x0 0x200>;
- interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
- #address-cells = <1>;
- #size-cells = <0>;
- ti,spi-num-cs = <1>;
- dmas = <&sdma 70>, <&sdma 71>;
- dma-names = "tx0", "rx0";
- };
+ status = "disabled";
};
target-module@...00 { /* 0x480d1000, ap 73 44.0 */
diff --git a/arch/arm/boot/dts/omap4.dtsi b/arch/arm/boot/dts/omap4.dtsi
--- a/arch/arm/boot/dts/omap4.dtsi
+++ b/arch/arm/boot/dts/omap4.dtsi
@@ -193,6 +193,66 @@
#gpio-cells = <2>;
};
+ mcspi1: spi@...98000 {
+ compatible = "ti,omap4-mcspi";
+ reg = <0x48098000 0x200>;
+ interrupts = <GIC_SPI 65 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ti,hwmods = "mcspi1";
+ ti,spi-num-cs = <4>;
+ dmas = <&sdma 35>,
+ <&sdma 36>,
+ <&sdma 37>,
+ <&sdma 38>,
+ <&sdma 39>,
+ <&sdma 40>,
+ <&sdma 41>,
+ <&sdma 42>;
+ dma-names = "tx0", "rx0", "tx1", "rx1",
+ "tx2", "rx2", "tx3", "rx3";
+ };
+
+ mcspi2: spi@...9a000 {
+ compatible = "ti,omap4-mcspi";
+ reg = <0x4809a000 0x200>;
+ interrupts = <GIC_SPI 66 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ti,hwmods = "mcspi2";
+ ti,spi-num-cs = <2>;
+ dmas = <&sdma 43>,
+ <&sdma 44>,
+ <&sdma 45>,
+ <&sdma 46>;
+ dma-names = "tx0", "rx0", "tx1", "rx1";
+ };
+
+ mcspi3: spi@...b8000 {
+ compatible = "ti,omap4-mcspi";
+ reg = <0x480b8000 0x200>;
+ interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ti,hwmods = "mcspi3";
+ ti,spi-num-cs = <2>;
+ dmas = <&sdma 15>, <&sdma 16>;
+ dma-names = "tx0", "rx0";
+ };
+
+ mcspi4: spi@...ba000 {
+ compatible = "ti,omap4-mcspi";
+ reg = <0x480ba000 0x200>;
+ interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ ti,hwmods = "mcspi4";
+ ti,spi-num-cs = <1>;
+ dmas = <&sdma 70>, <&sdma 71>;
+ dma-names = "tx0", "rx0";
+ };
+
+
mmu_dsp: mmu@...66000 {
compatible = "ti,omap4-iommu";
reg = <0x4a066000 0x100>;
--
2.19.2
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