[PATCH v2 00/10] Allwinner A64/H6 IR support

[PATCH v2 00/10] Allwinner A64/H6 IR support

[Clément Péron]

Hi,

A64 IR support series[1] pointed out that an A31 bindings should be
introduced.

This series introduce the A31 compatible bindings, then switch it on
the already existing board.

Finally introduce A64 and H6 support.

Regards,
Clément

[1] https://lore.kernel.org/patchwork/patch/1031390/#1221464

Changes since v1:
 - Document reset lines as required since A31
 - Explain the memory mapping difference in commit log
 - Fix misspelling "Allwiner" to "Allwinner"

Clément Péron (8):
  dt-bindings: media: sunxi-ir: add A31 compatible
  media: rc: sunxi: Add A31 compatible
  ARM: dts: sunxi: prefer A31 instead of A13 for ir
  dt-bindings: media: sunxi-ir: Add A64 compatible
  dt-bindings: media: sunxi-ir: Add H6 compatible
  arm64: dts: allwinner: h6: Add IR receiver node
  arm64: dts: allwinner: h6: Enable IR on H6 boards
  arm64: defconfig: enable IR SUNXI option

Igors Makejevs (1):
  arm64: dts: allwinner: a64: Add IR node

Jernej Skrabec (1):
  arm64: dts: allwinner: a64: Enable IR on Orange Pi Win

 .../devicetree/bindings/media/sunxi-ir.txt    | 11 +++++++++--
 arch/arm/boot/dts/sun6i-a31.dtsi              |  2 +-
 arch/arm/boot/dts/sun8i-a83t.dtsi             |  2 +-
 arch/arm/boot/dts/sun9i-a80.dtsi              |  2 +-
 arch/arm/boot/dts/sunxi-h3-h5.dtsi            |  2 +-
 .../dts/allwinner/sun50i-a64-orangepi-win.dts |  4 ++++
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
 .../dts/allwinner/sun50i-h6-beelink-gs1.dts   |  4 ++++
 .../dts/allwinner/sun50i-h6-orangepi.dtsi     |  4 ++++
 .../boot/dts/allwinner/sun50i-h6-pine-h64.dts |  4 ++++
 arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi  | 19 +++++++++++++++++++
 arch/arm64/configs/defconfig                  |  1 +
 drivers/media/rc/sunxi-cir.c                  |  1 +
 13 files changed, 68 insertions(+), 6 deletions(-)

-- 
2.20.1

[PATCH v2 01/10] dt-bindings: media: sunxi-ir: add A31 compatible

[Clément Péron]

Allwinner A31 has introduced a new memory mapping and a
reset line.

The difference in memory mapping are :

- In the configure register there is a new sample bit
  and Allwinner has introduced the active threshold feature.

- In the status register a new STAT bit is present.

Note: CGPO and DRQ_EN bits are removed on A31 but present on A13
and on new SoCs like A64/H6.
This is actually not an issue as these bits are togglable and new
SoCs have a dedicated bindings.

Introduce this bindings to make a difference since this generation.
And declare the reset line required since A31.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 Documentation/devicetree/bindings/media/sunxi-ir.txt | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/media/sunxi-ir.txt b/Documentation/devicetree/bindings/media/sunxi-ir.txt
index 278098987edb..2e59a32a7e33 100644
--- a/Documentation/devicetree/bindings/media/sunxi-ir.txt
+++ b/Documentation/devicetree/bindings/media/sunxi-ir.txt
@@ -1,16 +1,21 @@
 Device-Tree bindings for SUNXI IR controller found in sunXi SoC family
 
 Required properties:
-- compatible	    : "allwinner,sun4i-a10-ir" or "allwinner,sun5i-a13-ir"
+- compatible	    :
+	"allwinner,sun4i-a10-ir"
+	"allwinner,sun5i-a13-ir"
+	"allwinner,sun6i-a31-ir"
 - clocks	    : list of clock specifiers, corresponding to
 		      entries in clock-names property;
 - clock-names	    : should contain "apb" and "ir" entries;
 - interrupts	    : should contain IR IRQ number;
 - reg		    : should contain IO map address for IR.
 
+Required properties since A31:
+- resets	    : phandle + reset specifier pair
+
 Optional properties:
 - linux,rc-map-name: see rc.txt file in the same directory.
-- resets : phandle + reset specifier pair
 - clock-frequency  : IR Receiver clock frequency, in Hertz. Defaults to 8 MHz
 		     if missing.
 
-- 
2.20.1

[PATCH v2 02/10] media: rc: sunxi: Add A31 compatible

[Clément Péron]

Allwiner A31 has a different memory mapping so add the compatible
we will need it later.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 drivers/media/rc/sunxi-cir.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
index 307e44714ea0..29ac33b68596 100644
--- a/drivers/media/rc/sunxi-cir.c
+++ b/drivers/media/rc/sunxi-cir.c
@@ -319,6 +319,7 @@ static int sunxi_ir_remove(struct platform_device *pdev)
 static const struct of_device_id sunxi_ir_match[] = {
 	{ .compatible = "allwinner,sun4i-a10-ir", },
 	{ .compatible = "allwinner,sun5i-a13-ir", },
+	{ .compatible = "allwinner,sun6i-a31-ir", },
 	{},
 };
 MODULE_DEVICE_TABLE(of, sunxi_ir_match);
-- 
2.20.1

Re: [PATCH v2 02/10] media: rc: sunxi: Add A31 compatible

[Maxime Ripard]

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Hi,

On Mon, May 27, 2019 at 12:25:28AM +0200, Clément Péron wrote:
> Allwiner A31 has a different memory mapping so add the compatible
> we will need it later.
>
> Signed-off-by: Clément Péron <peron.clem@gmail.com>
> ---
>  drivers/media/rc/sunxi-cir.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
> index 307e44714ea0..29ac33b68596 100644
> --- a/drivers/media/rc/sunxi-cir.c
> +++ b/drivers/media/rc/sunxi-cir.c
> @@ -319,6 +319,7 @@ static int sunxi_ir_remove(struct platform_device *pdev)
>  static const struct of_device_id sunxi_ir_match[] = {
>  	{ .compatible = "allwinner,sun4i-a10-ir", },
>  	{ .compatible = "allwinner,sun5i-a13-ir", },
> +	{ .compatible = "allwinner,sun6i-a31-ir", },

We should also move from reset_get_optional to the non optional
variant for the A31, and ignore it otherwise.

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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Re: [PATCH v2 02/10] media: rc: sunxi: Add A31 compatible

[Clément Péron]

Hi Maxime,

On Mon, 27 May 2019 at 09:47, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
>
> Hi,
>
> On Mon, May 27, 2019 at 12:25:28AM +0200, Clément Péron wrote:
> > Allwiner A31 has a different memory mapping so add the compatible
> > we will need it later.
> >
> > Signed-off-by: Clément Péron <peron.clem@gmail.com>
> > ---
> >  drivers/media/rc/sunxi-cir.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
> > index 307e44714ea0..29ac33b68596 100644
> > --- a/drivers/media/rc/sunxi-cir.c
> > +++ b/drivers/media/rc/sunxi-cir.c
> > @@ -319,6 +319,7 @@ static int sunxi_ir_remove(struct platform_device *pdev)
> >  static const struct of_device_id sunxi_ir_match[] = {
> >       { .compatible = "allwinner,sun4i-a10-ir", },
> >       { .compatible = "allwinner,sun5i-a13-ir", },
> > +     { .compatible = "allwinner,sun6i-a31-ir", },
>
> We should also move from reset_get_optional to the non optional
> variant for the A31, and ignore it otherwise.

Should this be done in this series ?
Thanks,
Clément

>
> Maxime
>
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com

Re: [PATCH v2 02/10] media: rc: sunxi: Add A31 compatible

[Maxime Ripard]

[-- Attachment #1: Type: text/plain, Size: 1333 bytes --]

On Mon, May 27, 2019 at 10:20:05AM +0200, Clément Péron wrote:
> Hi Maxime,
>
> On Mon, 27 May 2019 at 09:47, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
> >
> > Hi,
> >
> > On Mon, May 27, 2019 at 12:25:28AM +0200, Clément Péron wrote:
> > > Allwiner A31 has a different memory mapping so add the compatible
> > > we will need it later.
> > >
> > > Signed-off-by: Clément Péron <peron.clem@gmail.com>
> > > ---
> > >  drivers/media/rc/sunxi-cir.c | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/drivers/media/rc/sunxi-cir.c b/drivers/media/rc/sunxi-cir.c
> > > index 307e44714ea0..29ac33b68596 100644
> > > --- a/drivers/media/rc/sunxi-cir.c
> > > +++ b/drivers/media/rc/sunxi-cir.c
> > > @@ -319,6 +319,7 @@ static int sunxi_ir_remove(struct platform_device *pdev)
> > >  static const struct of_device_id sunxi_ir_match[] = {
> > >       { .compatible = "allwinner,sun4i-a10-ir", },
> > >       { .compatible = "allwinner,sun5i-a13-ir", },
> > > +     { .compatible = "allwinner,sun6i-a31-ir", },
> >
> > We should also move from reset_get_optional to the non optional
> > variant for the A31, and ignore it otherwise.
>
> Should this be done in this series ?

Yep, please

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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[PATCH v2 03/10] ARM: dts: sunxi: prefer A31 instead of A13 for ir

[Clément Péron]

Since A31, memory mapping of the IR driver has changed.

Prefer the A31 bindings instead of A13.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm/boot/dts/sun6i-a31.dtsi   | 2 +-
 arch/arm/boot/dts/sun8i-a83t.dtsi  | 2 +-
 arch/arm/boot/dts/sun9i-a80.dtsi   | 2 +-
 arch/arm/boot/dts/sunxi-h3-h5.dtsi | 2 +-
 4 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm/boot/dts/sun6i-a31.dtsi b/arch/arm/boot/dts/sun6i-a31.dtsi
index c04efad81bbc..110622b30796 100644
--- a/arch/arm/boot/dts/sun6i-a31.dtsi
+++ b/arch/arm/boot/dts/sun6i-a31.dtsi
@@ -1351,7 +1351,7 @@
 		};
 
 		ir: ir@1f02000 {
-			compatible = "allwinner,sun5i-a13-ir";
+			compatible = "allwinner,sun6i-a31-ir";
 			clocks = <&apb0_gates 1>, <&ir_clk>;
 			clock-names = "apb", "ir";
 			resets = <&apb0_rst 1>;
diff --git a/arch/arm/boot/dts/sun8i-a83t.dtsi b/arch/arm/boot/dts/sun8i-a83t.dtsi
index 392b0cabbf0d..8d603f3309f2 100644
--- a/arch/arm/boot/dts/sun8i-a83t.dtsi
+++ b/arch/arm/boot/dts/sun8i-a83t.dtsi
@@ -1067,7 +1067,7 @@
 
 		r_cir: ir@1f02000 {
 			compatible = "allwinner,sun8i-a83t-ir",
-				"allwinner,sun5i-a13-ir";
+				"allwinner,sun6i-a31-ir";
 			clocks = <&r_ccu CLK_APB0_IR>, <&r_ccu CLK_IR>;
 			clock-names = "apb", "ir";
 			resets = <&r_ccu RST_APB0_IR>;
diff --git a/arch/arm/boot/dts/sun9i-a80.dtsi b/arch/arm/boot/dts/sun9i-a80.dtsi
index 0c1eec9000e3..310cd972ee5b 100644
--- a/arch/arm/boot/dts/sun9i-a80.dtsi
+++ b/arch/arm/boot/dts/sun9i-a80.dtsi
@@ -1167,7 +1167,7 @@
 		};
 
 		r_ir: ir@8002000 {
-			compatible = "allwinner,sun5i-a13-ir";
+			compatible = "allwinner,sun6i-a31-ir";
 			interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
 			pinctrl-names = "default";
 			pinctrl-0 = <&r_ir_pins>;
diff --git a/arch/arm/boot/dts/sunxi-h3-h5.dtsi b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
index 84977d4eb97a..f0f5ba349c1b 100644
--- a/arch/arm/boot/dts/sunxi-h3-h5.dtsi
+++ b/arch/arm/boot/dts/sunxi-h3-h5.dtsi
@@ -822,7 +822,7 @@
 		};
 
 		ir: ir@1f02000 {
-			compatible = "allwinner,sun5i-a13-ir";
+			compatible = "allwinner,sun6i-a31-ir";
 			clocks = <&r_ccu CLK_APB0_IR>, <&r_ccu CLK_IR>;
 			clock-names = "apb", "ir";
 			resets = <&r_ccu RST_APB0_IR>;
-- 
2.20.1

Re: [PATCH v2 03/10] ARM: dts: sunxi: prefer A31 instead of A13 for ir

[Maxime Ripard]

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On Mon, May 27, 2019 at 12:25:29AM +0200, Clément Péron wrote:
> Since A31, memory mapping of the IR driver has changed.
>
> Prefer the A31 bindings instead of A13.
>
> Signed-off-by: Clément Péron <peron.clem@gmail.com>
> ---
>  arch/arm/boot/dts/sun6i-a31.dtsi   | 2 +-
>  arch/arm/boot/dts/sun8i-a83t.dtsi  | 2 +-
>  arch/arm/boot/dts/sun9i-a80.dtsi   | 2 +-
>  arch/arm/boot/dts/sunxi-h3-h5.dtsi | 2 +-

Can you split the H3 in a separate patch? this will go through a
separate branch.

Thanks!
Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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Re: [PATCH v2 03/10] ARM: dts: sunxi: prefer A31 instead of A13 for ir

[Clément Péron]

Hi Maxime,


On Mon, 27 May 2019 at 09:47, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
>
> On Mon, May 27, 2019 at 12:25:29AM +0200, Clément Péron wrote:
> > Since A31, memory mapping of the IR driver has changed.
> >
> > Prefer the A31 bindings instead of A13.
> >
> > Signed-off-by: Clément Péron <peron.clem@gmail.com>
> > ---
> >  arch/arm/boot/dts/sun6i-a31.dtsi   | 2 +-
> >  arch/arm/boot/dts/sun8i-a83t.dtsi  | 2 +-
> >  arch/arm/boot/dts/sun9i-a80.dtsi   | 2 +-
> >  arch/arm/boot/dts/sunxi-h3-h5.dtsi | 2 +-
>
> Can you split the H3 in a separate patch? this will go through a
> separate branch.

Ok I will,
Thanks,
Clément

>
> Thanks!
> Maxime
>
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com

[PATCH v2 04/10] dt-bindings: media: sunxi-ir: Add A64 compatible

[Clément Péron]

There are some minor differences between A31 and A64 driver.

But A31 IR driver is compatible with A64.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 Documentation/devicetree/bindings/media/sunxi-ir.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/media/sunxi-ir.txt b/Documentation/devicetree/bindings/media/sunxi-ir.txt
index 2e59a32a7e33..1dd287a4ab3a 100644
--- a/Documentation/devicetree/bindings/media/sunxi-ir.txt
+++ b/Documentation/devicetree/bindings/media/sunxi-ir.txt
@@ -5,6 +5,7 @@ Required properties:
 	"allwinner,sun4i-a10-ir"
 	"allwinner,sun5i-a13-ir"
 	"allwinner,sun6i-a31-ir"
+	"allwinner,sun50i-a64-ir", "allwinner,sun6i-a31-ir"
 - clocks	    : list of clock specifiers, corresponding to
 		      entries in clock-names property;
 - clock-names	    : should contain "apb" and "ir" entries;
-- 
2.20.1

[PATCH v2 05/10] arm64: dts: allwinner: a64: Add IR node

[Clément Péron]

From: Igors Makejevs <git_bb@bwzone.com>

IR peripheral is completely compatible with A31 one.

Signed-off-by: Igors Makejevs <git_bb@bwzone.com>
Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
index 8c5b521e6389..b22b0aa89515 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi
@@ -1072,6 +1072,19 @@
 			#size-cells = <0>;
 		};
 
+		r_ir: ir@1f02000 {
+			compatible = "allwinner,sun50i-a64-ir",
+				     "allwinner,sun6i-a31-ir";
+			reg = <0x01f02000 0x400>;
+			clocks = <&r_ccu CLK_APB0_IR>, <&r_ccu CLK_IR>;
+			clock-names = "apb", "ir";
+			resets = <&r_ccu RST_APB0_IR>;
+			interrupts = <GIC_SPI 37 IRQ_TYPE_LEVEL_HIGH>;
+			pinctrl-names = "default";
+			pinctrl-0 = <&r_ir_rx_pin>;
+			status = "disabled";
+		};
+
 		r_pwm: pwm@1f03800 {
 			compatible = "allwinner,sun50i-a64-pwm",
 				     "allwinner,sun5i-a13-pwm";
@@ -1099,6 +1112,11 @@
 				function = "s_i2c";
 			};
 
+			r_ir_rx_pin: r-ir-rx-pin {
+				pins = "PL11";
+				function = "s_cir_rx";
+			};
+
 			r_pwm_pin: r-pwm-pin {
 				pins = "PL10";
 				function = "s_pwm";
-- 
2.20.1

[PATCH v2 06/10] arm64: dts: allwinner: a64: Enable IR on Orange Pi Win

[Clément Péron]

From: Jernej Skrabec <jernej.skrabec@siol.net>

OrangePi Win board contains IR receiver. Enable it.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-a64-orangepi-win.dts | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-a64-orangepi-win.dts b/arch/arm64/boot/dts/allwinner/sun50i-a64-orangepi-win.dts
index 510f661229dc..e05191b71adf 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-a64-orangepi-win.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-a64-orangepi-win.dts
@@ -180,6 +180,10 @@
 	status = "okay";
 };
 
+&r_ir {
+	status = "okay";
+};
+
 &r_rsb {
 	status = "okay";
 
-- 
2.20.1

[PATCH v2 07/10] dt-bindings: media: sunxi-ir: Add H6 compatible

[Clément Péron]

There are some minor differences between A31 or A64 with H6 IR peripheral.

But A31 IR driver is compatible with H6.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 Documentation/devicetree/bindings/media/sunxi-ir.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/media/sunxi-ir.txt b/Documentation/devicetree/bindings/media/sunxi-ir.txt
index 1dd287a4ab3a..81eaf95fb764 100644
--- a/Documentation/devicetree/bindings/media/sunxi-ir.txt
+++ b/Documentation/devicetree/bindings/media/sunxi-ir.txt
@@ -6,6 +6,7 @@ Required properties:
 	"allwinner,sun5i-a13-ir"
 	"allwinner,sun6i-a31-ir"
 	"allwinner,sun50i-a64-ir", "allwinner,sun6i-a31-ir"
+	"allwinner,sun50i-h6-ir", "allwinner,sun6i-a31-ir"
 - clocks	    : list of clock specifiers, corresponding to
 		      entries in clock-names property;
 - clock-names	    : should contain "apb" and "ir" entries;
-- 
2.20.1

[PATCH v2 08/10] arm64: dts: allwinner: h6: Add IR receiver node

[Clément Péron]

Allwinner H6 IR is similar to A31 and can use same driver.

Add support for it.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi | 19 +++++++++++++++++++
 1 file changed, 19 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
index 16c5c3d0fd81..649cbdfe452e 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi
@@ -647,6 +647,25 @@
 				pins = "PL0", "PL1";
 				function = "s_i2c";
 			};
+
+			r_ir_rx_pin: r-ir-rx-pin {
+				pins = "PL9";
+				function = "s_cir_rx";
+			};
+		};
+
+		r_ir: ir@7040000 {
+				compatible = "allwinner,sun50i-h6-ir",
+					     "allwinner,sun6i-a31-ir";
+				reg = <0x07040000 0x400>;
+				interrupts = <GIC_SPI 109 IRQ_TYPE_LEVEL_HIGH>;
+				clocks = <&r_ccu CLK_R_APB1_IR>,
+					 <&r_ccu CLK_IR>;
+				clock-names = "apb", "ir";
+				resets = <&r_ccu RST_R_APB1_IR>;
+				pinctrl-names = "default";
+				pinctrl-0 = <&r_ir_rx_pin>;
+				status = "disabled";
 		};
 
 		r_i2c: i2c@7081400 {
-- 
2.20.1

[PATCH v2 09/10] arm64: dts: allwinner: h6: Enable IR on H6 boards

[Clément Péron]

Beelink GS1, OrangePi H6 boards and Pine H64 have an IR receiver.

Enable it in their device-tree.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm64/boot/dts/allwinner/sun50i-h6-beelink-gs1.dts | 4 ++++
 arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi   | 4 ++++
 arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts    | 4 ++++
 3 files changed, 12 insertions(+)

diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-beelink-gs1.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-beelink-gs1.dts
index 0dc33c90dd60..680dc29cb089 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-beelink-gs1.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-beelink-gs1.dts
@@ -232,6 +232,10 @@
 	};
 };
 
+&r_ir {
+	status = "okay";
+};
+
 &r_pio {
 	/*
 	 * PL0 and PL1 are used for PMIC I2C
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
index 62e27948a3fa..ec9b6a578e3f 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-orangepi.dtsi
@@ -189,6 +189,10 @@
 	};
 };
 
+&r_ir {
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_ph_pins>;
diff --git a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
index 4802902e128f..ae12ee4fcc77 100644
--- a/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
+++ b/arch/arm64/boot/dts/allwinner/sun50i-h6-pine-h64.dts
@@ -247,6 +247,10 @@
 	};
 };
 
+&r_ir {
+	status = "okay";
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_ph_pins>;
-- 
2.20.1

[PATCH v2 10/10] arm64: defconfig: enable IR SUNXI option

[Clément Péron]

Enable CONFIG_IR_SUNXI option for ARM64, so that Allwinner A64/H6 SoCs
can use their IR receiver controller.

Signed-off-by: Clément Péron <peron.clem@gmail.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index 4d583514258c..5128029100d2 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -460,6 +460,7 @@ CONFIG_RC_CORE=m
 CONFIG_RC_DECODERS=y
 CONFIG_RC_DEVICES=y
 CONFIG_IR_MESON=m
+CONFIG_IR_SUNXI=m
 CONFIG_MEDIA_SUPPORT=m
 CONFIG_MEDIA_CAMERA_SUPPORT=y
 CONFIG_MEDIA_ANALOG_TV_SUPPORT=y
-- 
2.20.1

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Ondřej Jirman]

Hi Clément,

On Mon, May 27, 2019 at 12:25:26AM +0200, Clément Péron wrote:
> Hi,
> 
> A64 IR support series[1] pointed out that an A31 bindings should be
> introduced.
> 
> This series introduce the A31 compatible bindings, then switch it on
> the already existing board.
> 
> Finally introduce A64 and H6 support.

Does H6 support actually work? I don't see any driver changes and last time
I tried with the exact same bindings, I got RCU stalls shortly after boot.

Enabling/disabling ir node was enough to trigger/stop the RCU stalls on H6.

regards,
	o.

> Regards,
> Clément
> 
> [1] https://lore.kernel.org/patchwork/patch/1031390/#1221464
> 
> Changes since v1:
>  - Document reset lines as required since A31
>  - Explain the memory mapping difference in commit log
>  - Fix misspelling "Allwiner" to "Allwinner"
> 
> Clément Péron (8):
>   dt-bindings: media: sunxi-ir: add A31 compatible
>   media: rc: sunxi: Add A31 compatible
>   ARM: dts: sunxi: prefer A31 instead of A13 for ir
>   dt-bindings: media: sunxi-ir: Add A64 compatible
>   dt-bindings: media: sunxi-ir: Add H6 compatible
>   arm64: dts: allwinner: h6: Add IR receiver node
>   arm64: dts: allwinner: h6: Enable IR on H6 boards
>   arm64: defconfig: enable IR SUNXI option
> 
> Igors Makejevs (1):
>   arm64: dts: allwinner: a64: Add IR node
> 
> Jernej Skrabec (1):
>   arm64: dts: allwinner: a64: Enable IR on Orange Pi Win
> 
>  .../devicetree/bindings/media/sunxi-ir.txt    | 11 +++++++++--
>  arch/arm/boot/dts/sun6i-a31.dtsi              |  2 +-
>  arch/arm/boot/dts/sun8i-a83t.dtsi             |  2 +-
>  arch/arm/boot/dts/sun9i-a80.dtsi              |  2 +-
>  arch/arm/boot/dts/sunxi-h3-h5.dtsi            |  2 +-
>  .../dts/allwinner/sun50i-a64-orangepi-win.dts |  4 ++++
>  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
>  .../dts/allwinner/sun50i-h6-beelink-gs1.dts   |  4 ++++
>  .../dts/allwinner/sun50i-h6-orangepi.dtsi     |  4 ++++
>  .../boot/dts/allwinner/sun50i-h6-pine-h64.dts |  4 ++++
>  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi  | 19 +++++++++++++++++++
>  arch/arm64/configs/defconfig                  |  1 +
>  drivers/media/rc/sunxi-cir.c                  |  1 +
>  13 files changed, 68 insertions(+), 6 deletions(-)
> 
> -- 
> 2.20.1
> 
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Clément Péron]

Hi Ondřej,

On Mon, 27 May 2019 at 15:48, Ondřej Jirman <megous@megous.com> wrote:
>
> Hi Clément,
>
> On Mon, May 27, 2019 at 12:25:26AM +0200, Clément Péron wrote:
> > Hi,
> >
> > A64 IR support series[1] pointed out that an A31 bindings should be
> > introduced.
> >
> > This series introduce the A31 compatible bindings, then switch it on
> > the already existing board.
> >
> > Finally introduce A64 and H6 support.
>
> Does H6 support actually work? I don't see any driver changes and last time
> I tried with the exact same bindings, I got RCU stalls shortly after boot.

Actually, I have tested only on H6 on my Beelink GS1 with a "NEC" remote.

I have manually toggle the protocols and do a simple cat in /dev/input/event0
# echo nec > /sys/class/rc/rc0/protocols
# cat /dev/input/event0 | hexdump
0000000 0093 0000 0000 0000 8bfb 0009 0000 0000
0000010 0004 0004 8028 0000 0093 0000 0000 0000
0000020 8bfb 0009 0000 0000 0000 0000 0000 0000
0000030 0093 0000 0000 0000 55be 000a 0000 0000
0000040 0004 0004 8028 0000 0093 0000 0000 0000
0000050 55be 000a 0000 0000 0000 0000 0000 0000
0000060 0093 0000 0000 0000 fa42 000d 0000 0000
0000070 0004 0004 8028 0000 0093 0000 0000 0000
0000080 fa42 000d 0000 0000 0000 0000 0000 0000
0000090 0093 0000 0000 0000 c41a 000e 0000 0000
00000a0 0004 0004 8028 0000 0093 0000 0000 0000
00000b0 c41a 000e 0000 0000 0000 0000 0000 0000


Which kernel did you test with? Do you have any log?

Thanks,
Clément

>
> Enabling/disabling ir node was enough to trigger/stop the RCU stalls on H6.
>
> regards,
>         o.
>
> > Regards,
> > Clément
> >
> > [1] https://lore.kernel.org/patchwork/patch/1031390/#1221464
> >
> > Changes since v1:
> >  - Document reset lines as required since A31
> >  - Explain the memory mapping difference in commit log
> >  - Fix misspelling "Allwiner" to "Allwinner"
> >
> > Clément Péron (8):
> >   dt-bindings: media: sunxi-ir: add A31 compatible
> >   media: rc: sunxi: Add A31 compatible
> >   ARM: dts: sunxi: prefer A31 instead of A13 for ir
> >   dt-bindings: media: sunxi-ir: Add A64 compatible
> >   dt-bindings: media: sunxi-ir: Add H6 compatible
> >   arm64: dts: allwinner: h6: Add IR receiver node
> >   arm64: dts: allwinner: h6: Enable IR on H6 boards
> >   arm64: defconfig: enable IR SUNXI option
> >
> > Igors Makejevs (1):
> >   arm64: dts: allwinner: a64: Add IR node
> >
> > Jernej Skrabec (1):
> >   arm64: dts: allwinner: a64: Enable IR on Orange Pi Win
> >
> >  .../devicetree/bindings/media/sunxi-ir.txt    | 11 +++++++++--
> >  arch/arm/boot/dts/sun6i-a31.dtsi              |  2 +-
> >  arch/arm/boot/dts/sun8i-a83t.dtsi             |  2 +-
> >  arch/arm/boot/dts/sun9i-a80.dtsi              |  2 +-
> >  arch/arm/boot/dts/sunxi-h3-h5.dtsi            |  2 +-
> >  .../dts/allwinner/sun50i-a64-orangepi-win.dts |  4 ++++
> >  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
> >  .../dts/allwinner/sun50i-h6-beelink-gs1.dts   |  4 ++++
> >  .../dts/allwinner/sun50i-h6-orangepi.dtsi     |  4 ++++
> >  .../boot/dts/allwinner/sun50i-h6-pine-h64.dts |  4 ++++
> >  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi  | 19 +++++++++++++++++++
> >  arch/arm64/configs/defconfig                  |  1 +
> >  drivers/media/rc/sunxi-cir.c                  |  1 +
> >  13 files changed, 68 insertions(+), 6 deletions(-)
> >
> > --
> > 2.20.1
> >
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Ondřej Jirman]

Hi Clément,

On Mon, May 27, 2019 at 04:59:35PM +0200, Clément Péron wrote:
> Hi Ondřej,
> 
> On Mon, 27 May 2019 at 15:48, Ondřej Jirman <megous@megous.com> wrote:
> >
> > Hi Clément,
> >
> > On Mon, May 27, 2019 at 12:25:26AM +0200, Clément Péron wrote:
> > > Hi,
> > >
> > > A64 IR support series[1] pointed out that an A31 bindings should be
> > > introduced.
> > >
> > > This series introduce the A31 compatible bindings, then switch it on
> > > the already existing board.
> > >
> > > Finally introduce A64 and H6 support.
> >
> > Does H6 support actually work? I don't see any driver changes and last time
> > I tried with the exact same bindings, I got RCU stalls shortly after boot.
> 
> Actually, I have tested only on H6 on my Beelink GS1 with a "NEC" remote.
> 
> I have manually toggle the protocols and do a simple cat in /dev/input/event0
> # echo nec > /sys/class/rc/rc0/protocols
> # cat /dev/input/event0 | hexdump
> 0000000 0093 0000 0000 0000 8bfb 0009 0000 0000
> 0000010 0004 0004 8028 0000 0093 0000 0000 0000
> 0000020 8bfb 0009 0000 0000 0000 0000 0000 0000
> 0000030 0093 0000 0000 0000 55be 000a 0000 0000
> 0000040 0004 0004 8028 0000 0093 0000 0000 0000
> 0000050 55be 000a 0000 0000 0000 0000 0000 0000
> 0000060 0093 0000 0000 0000 fa42 000d 0000 0000
> 0000070 0004 0004 8028 0000 0093 0000 0000 0000
> 0000080 fa42 000d 0000 0000 0000 0000 0000 0000
> 0000090 0093 0000 0000 0000 c41a 000e 0000 0000
> 00000a0 0004 0004 8028 0000 0093 0000 0000 0000
> 00000b0 c41a 000e 0000 0000 0000 0000 0000 0000
> 
> 
> Which kernel did you test with? Do you have any log?

I tested with my kernel (https://megous.com/git/linux/log/?h=opi3-5.2). I also
tried with 5.1 and the same kernel build on H5, to exclude some early 5.2-rc
bugs and to see if this is H6 specific.

I'll try testing again with your patches, and get you some logs. But last time
they were not very informative.

regards,
	o.

> Thanks,
> Clément
> 
> >
> > Enabling/disabling ir node was enough to trigger/stop the RCU stalls on H6.
> >
> > regards,
> >         o.
> >
> > > Regards,
> > > Clément
> > >
> > > [1] https://lore.kernel.org/patchwork/patch/1031390/#1221464
> > >
> > > Changes since v1:
> > >  - Document reset lines as required since A31
> > >  - Explain the memory mapping difference in commit log
> > >  - Fix misspelling "Allwiner" to "Allwinner"
> > >
> > > Clément Péron (8):
> > >   dt-bindings: media: sunxi-ir: add A31 compatible
> > >   media: rc: sunxi: Add A31 compatible
> > >   ARM: dts: sunxi: prefer A31 instead of A13 for ir
> > >   dt-bindings: media: sunxi-ir: Add A64 compatible
> > >   dt-bindings: media: sunxi-ir: Add H6 compatible
> > >   arm64: dts: allwinner: h6: Add IR receiver node
> > >   arm64: dts: allwinner: h6: Enable IR on H6 boards
> > >   arm64: defconfig: enable IR SUNXI option
> > >
> > > Igors Makejevs (1):
> > >   arm64: dts: allwinner: a64: Add IR node
> > >
> > > Jernej Skrabec (1):
> > >   arm64: dts: allwinner: a64: Enable IR on Orange Pi Win
> > >
> > >  .../devicetree/bindings/media/sunxi-ir.txt    | 11 +++++++++--
> > >  arch/arm/boot/dts/sun6i-a31.dtsi              |  2 +-
> > >  arch/arm/boot/dts/sun8i-a83t.dtsi             |  2 +-
> > >  arch/arm/boot/dts/sun9i-a80.dtsi              |  2 +-
> > >  arch/arm/boot/dts/sunxi-h3-h5.dtsi            |  2 +-
> > >  .../dts/allwinner/sun50i-a64-orangepi-win.dts |  4 ++++
> > >  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
> > >  .../dts/allwinner/sun50i-h6-beelink-gs1.dts   |  4 ++++
> > >  .../dts/allwinner/sun50i-h6-orangepi.dtsi     |  4 ++++
> > >  .../boot/dts/allwinner/sun50i-h6-pine-h64.dts |  4 ++++
> > >  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi  | 19 +++++++++++++++++++
> > >  arch/arm64/configs/defconfig                  |  1 +
> > >  drivers/media/rc/sunxi-cir.c                  |  1 +
> > >  13 files changed, 68 insertions(+), 6 deletions(-)
> > >
> > > --
> > > 2.20.1
> > >
> > >
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@lists.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Ondřej Jirman]

Hi Clément,

On Mon, May 27, 2019 at 06:31:17PM +0200, verejna wrote:
> Hi Clément,
> 
> On Mon, May 27, 2019 at 04:59:35PM +0200, Clément Péron wrote:
> > Hi Ondřej,
> > 
> > On Mon, 27 May 2019 at 15:48, Ondřej Jirman <megous@megous.com> wrote:
> > >
> > > Hi Clément,
> > >
> > > On Mon, May 27, 2019 at 12:25:26AM +0200, Clément Péron wrote:
> > > > Hi,
> > > >
> > > > A64 IR support series[1] pointed out that an A31 bindings should be
> > > > introduced.
> > > >
> > > > This series introduce the A31 compatible bindings, then switch it on
> > > > the already existing board.
> > > >
> > > > Finally introduce A64 and H6 support.
> > >
> > > Does H6 support actually work? I don't see any driver changes and last time
> > > I tried with the exact same bindings, I got RCU stalls shortly after boot.
> > 
> > Actually, I have tested only on H6 on my Beelink GS1 with a "NEC" remote.
> > 
> > I have manually toggle the protocols and do a simple cat in /dev/input/event0
> > # echo nec > /sys/class/rc/rc0/protocols
> > # cat /dev/input/event0 | hexdump
> > 0000000 0093 0000 0000 0000 8bfb 0009 0000 0000
> > 0000010 0004 0004 8028 0000 0093 0000 0000 0000
> > 0000020 8bfb 0009 0000 0000 0000 0000 0000 0000
> > 0000030 0093 0000 0000 0000 55be 000a 0000 0000
> > 0000040 0004 0004 8028 0000 0093 0000 0000 0000
> > 0000050 55be 000a 0000 0000 0000 0000 0000 0000
> > 0000060 0093 0000 0000 0000 fa42 000d 0000 0000
> > 0000070 0004 0004 8028 0000 0093 0000 0000 0000
> > 0000080 fa42 000d 0000 0000 0000 0000 0000 0000
> > 0000090 0093 0000 0000 0000 c41a 000e 0000 0000
> > 00000a0 0004 0004 8028 0000 0093 0000 0000 0000
> > 00000b0 c41a 000e 0000 0000 0000 0000 0000 0000
> > 
> > 
> > Which kernel did you test with? Do you have any log?
> 
> I tested with my kernel (https://megous.com/git/linux/log/?h=opi3-5.2). I also
> tried with 5.1 and the same kernel build on H5, to exclude some early 5.2-rc
> bugs and to see if this is H6 specific.
> 
> I'll try testing again with your patches, and get you some logs. But last time
> they were not very informative.

I'm testing on Orange Pi 3.

With your patches, I get kernel lockup after ~1 minute of use (ssh stops
responding/serial console stops responding). I don't have RC controller to test
the CIR. But just enabling the CIR causes kernel to hang shortly after boot.

I tried booting multiple times. Other results:

boot 2:

- ssh hangs even before connecting (ethernet crashes/is reset)

INFO: rcu_sched detected stalls on CPUs/tasks:
rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
rcu: blocking rcu_node structures:
 rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714 
rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
rcu: blocking rcu_node structures:
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203 

above messages appear regularly.

boot 3:

rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600 


Sometimes serial console keeps working. Sometimes it locks up too (but not
frequently). Storage locks up always (any program that was not run before
the crash can't be started and lock up the kernel hard, programs that
were executed prior, can be run again).


Exactly the same kernel build on H5 seems to work (or at least I was not able to
trigger the crash). So this seems to be limited to H6 for now.

I suspect that the crash occurs sooner if I vary the light (turn on/off the table
lamp light).

Without your patches, everything works fine on H6, and I never see
crashes/lockups.

I tired physically covering the IR receiver, and that helps preventing the
crash. As soon as I uncover it, the crash happens again in 1s or so:

rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777

This time I got the hung task and reboot: (probably not directly related)

INFO: task find:560 blocked for more than 120 seconds.
      Not tainted 5.2.0-rc2+ #7
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
find            D    0   560    551 0x00000000
Call trace:
 __switch_to+0x6c/0x90
 __schedule+0x1f4/0x578
 schedule+0x28/0xa8
 io_schedule+0x18/0x38
 __lock_page+0x12c/0x208
 pagecache_get_page+0x238/0x2e8
 __get_node_page+0x6c/0x310
 f2fs_get_node_page+0x14/0x20
 f2fs_iget+0x70/0xc60
 f2fs_lookup+0xcc/0x218
 __lookup_slow+0x78/0x160
 lookup_slow+0x3c/0x60
 walk_component+0x1e4/0x2e0
 path_lookupat.isra.13+0x5c/0x1e0
 filename_lookup.part.23+0x6c/0xe8
 user_path_at_empty+0x4c/0x60
 vfs_statx+0x78/0xd8
 __se_sys_newfstatat+0x24/0x48
 __arm64_sys_newfstatat+0x18/0x20
 el0_svc_handler+0x9c/0x170
 el0_svc+0x8/0xc
Kernel panic - not syncing: hung_task: blocked tasks
CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
Hardware name: OrangePi 3 (DT)
Call trace:
 dump_backtrace+0x0/0xf8
 show_stack+0x14/0x20
 dump_stack+0xa8/0xcc
 panic+0x124/0x2dc
 proc_dohung_task_timeout_secs+0x0/0x40
 kthread+0x120/0x128
 ret_from_fork+0x10/0x18
SMP: stopping secondary CPUs
Kernel Offset: disabled
CPU features: 0x0002,20002000
Memory Limit: none
Rebooting in 3 seconds..


Meanwhile H5 based board now runs for 15 minutes without issues.

So to sum up:

- these crashes are definitely H6 IR related
  - the same kernel, on H5 works
  - covering the sensor prevents the crashes on H6

So we should probably hold on with the series, until this is figured out.

I have tried searching for differences between H3 and H6 BSPs. And there are some:

                break;
        case IR_IRQ_FIFO_SIZE:
-               irq_reg = sunxi_smc_readl(IR_BASE+IR_RXINTE_REG);
-               irq_reg |= IR_FIFO_32;
+               irq_reg = readl(reg_base + IR_RXINTE_REG);
+               irq_reg |= IR_FIFO_20;
                break;
        }

        case IR_CLK_SAMPLE:
-#ifdef FPGA_SIM_CONFIG
-               sample_reg |= 0x3<<0;  /* Fsample = 24MHz/512 = 46875Hz (21.33us) */
-#else
-               sample_reg |= IR_SAMPLE_128;
-#endif
+               sample_reg |= IR_SAMPLE_DEV;
                break;

+       case IR_BOTH_PULSE_MODE:
+               ctrl_reg = readl(reg_base + IR_CTRL_REG);
+               ctrl_reg |= IR_BOTH_PULSE;
+               break;
+       case IR_LOW_PULSE_MODE:
+               ctrl_reg = readl(reg_base + IR_CTRL_REG);
+               ctrl_reg |= IR_LOW_PULSE;
+               break;
+       case IR_HIGH_PULSE_MODE:
+               ctrl_reg = readl(reg_base + IR_CTRL_REG);
+               ctrl_reg |= IR_HIGH_PULSE;
+               break;


0x0000 CIR_CTL

  new bit 8 - CGPO
    General Program Output (GPO) Control in CIR mode for TX Pin
    0: Low level
    1: High level

CIR_RXSTA 0x0030

  RAC is just 13:8 instead of 14:8


I haven't looked deeper, because I have no use for IR on H6. But I hope this
helps. I can help testing patches if you like.

thank you and regards,
	o.

> regards,
> 	o.
> 
> > Thanks,
> > Clément
> > 
> > >
> > > Enabling/disabling ir node was enough to trigger/stop the RCU stalls on H6.
> > >
> > > regards,
> > >         o.
> > >
> > > > Regards,
> > > > Clément
> > > >
> > > > [1] https://lore.kernel.org/patchwork/patch/1031390/#1221464
> > > >
> > > > Changes since v1:
> > > >  - Document reset lines as required since A31
> > > >  - Explain the memory mapping difference in commit log
> > > >  - Fix misspelling "Allwiner" to "Allwinner"
> > > >
> > > > Clément Péron (8):
> > > >   dt-bindings: media: sunxi-ir: add A31 compatible
> > > >   media: rc: sunxi: Add A31 compatible
> > > >   ARM: dts: sunxi: prefer A31 instead of A13 for ir
> > > >   dt-bindings: media: sunxi-ir: Add A64 compatible
> > > >   dt-bindings: media: sunxi-ir: Add H6 compatible
> > > >   arm64: dts: allwinner: h6: Add IR receiver node
> > > >   arm64: dts: allwinner: h6: Enable IR on H6 boards
> > > >   arm64: defconfig: enable IR SUNXI option
> > > >
> > > > Igors Makejevs (1):
> > > >   arm64: dts: allwinner: a64: Add IR node
> > > >
> > > > Jernej Skrabec (1):
> > > >   arm64: dts: allwinner: a64: Enable IR on Orange Pi Win
> > > >
> > > >  .../devicetree/bindings/media/sunxi-ir.txt    | 11 +++++++++--
> > > >  arch/arm/boot/dts/sun6i-a31.dtsi              |  2 +-
> > > >  arch/arm/boot/dts/sun8i-a83t.dtsi             |  2 +-
> > > >  arch/arm/boot/dts/sun9i-a80.dtsi              |  2 +-
> > > >  arch/arm/boot/dts/sunxi-h3-h5.dtsi            |  2 +-
> > > >  .../dts/allwinner/sun50i-a64-orangepi-win.dts |  4 ++++
> > > >  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
> > > >  .../dts/allwinner/sun50i-h6-beelink-gs1.dts   |  4 ++++
> > > >  .../dts/allwinner/sun50i-h6-orangepi.dtsi     |  4 ++++
> > > >  .../boot/dts/allwinner/sun50i-h6-pine-h64.dts |  4 ++++
> > > >  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi  | 19 +++++++++++++++++++
> > > >  arch/arm64/configs/defconfig                  |  1 +
> > > >  drivers/media/rc/sunxi-cir.c                  |  1 +
> > > >  13 files changed, 68 insertions(+), 6 deletions(-)
> > > >
> > > > --
> > > > 2.20.1
> > > >
> > > >
> > > > _______________________________________________
> > > > linux-arm-kernel mailing list
> > > > linux-arm-kernel@lists.infradead.org
> > > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > 
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Clément Péron]

Hi Ondrej,

On Mon, 27 May 2019 at 19:23, Ondřej Jirman <megous@megous.com> wrote:
>
> Hi Clément,
>
> On Mon, May 27, 2019 at 06:31:17PM +0200, verejna wrote:
> > Hi Clément,
> >
> > On Mon, May 27, 2019 at 04:59:35PM +0200, Clément Péron wrote:
> > > Hi Ondřej,
> > >
> > > On Mon, 27 May 2019 at 15:48, Ondřej Jirman <megous@megous.com> wrote:
> > > >
> > > > Hi Clément,
> > > >
> > > > On Mon, May 27, 2019 at 12:25:26AM +0200, Clément Péron wrote:
> > > > > Hi,
> > > > >
> > > > > A64 IR support series[1] pointed out that an A31 bindings should be
> > > > > introduced.
> > > > >
> > > > > This series introduce the A31 compatible bindings, then switch it on
> > > > > the already existing board.
> > > > >
> > > > > Finally introduce A64 and H6 support.
> > > >
> > > > Does H6 support actually work? I don't see any driver changes and last time
> > > > I tried with the exact same bindings, I got RCU stalls shortly after boot.
> > >
> > > Actually, I have tested only on H6 on my Beelink GS1 with a "NEC" remote.
> > >
> > > I have manually toggle the protocols and do a simple cat in /dev/input/event0
> > > # echo nec > /sys/class/rc/rc0/protocols
> > > # cat /dev/input/event0 | hexdump
> > > 0000000 0093 0000 0000 0000 8bfb 0009 0000 0000
> > > 0000010 0004 0004 8028 0000 0093 0000 0000 0000
> > > 0000020 8bfb 0009 0000 0000 0000 0000 0000 0000
> > > 0000030 0093 0000 0000 0000 55be 000a 0000 0000
> > > 0000040 0004 0004 8028 0000 0093 0000 0000 0000
> > > 0000050 55be 000a 0000 0000 0000 0000 0000 0000
> > > 0000060 0093 0000 0000 0000 fa42 000d 0000 0000
> > > 0000070 0004 0004 8028 0000 0093 0000 0000 0000
> > > 0000080 fa42 000d 0000 0000 0000 0000 0000 0000
> > > 0000090 0093 0000 0000 0000 c41a 000e 0000 0000
> > > 00000a0 0004 0004 8028 0000 0093 0000 0000 0000
> > > 00000b0 c41a 000e 0000 0000 0000 0000 0000 0000
> > >
> > >
> > > Which kernel did you test with? Do you have any log?
> >
> > I tested with my kernel (https://megous.com/git/linux/log/?h=opi3-5.2). I also
> > tried with 5.1 and the same kernel build on H5, to exclude some early 5.2-rc
> > bugs and to see if this is H6 specific.
> >
> > I'll try testing again with your patches, and get you some logs. But last time
> > they were not very informative.
>
> I'm testing on Orange Pi 3.
>
> With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> responding/serial console stops responding). I don't have RC controller to test
> the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
>
> I tried booting multiple times. Other results:
>
> boot 2:
>
> - ssh hangs even before connecting (ethernet crashes/is reset)
>
> INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> rcu: blocking rcu_node structures:
>  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> rcu: blocking rcu_node structures:
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
>
> above messages appear regularly.
>
> boot 3:
>
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
>
>
> Sometimes serial console keeps working. Sometimes it locks up too (but not
> frequently). Storage locks up always (any program that was not run before
> the crash can't be started and lock up the kernel hard, programs that
> were executed prior, can be run again).
>
>
> Exactly the same kernel build on H5 seems to work (or at least I was not able to
> trigger the crash). So this seems to be limited to H6 for now.
>
> I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> lamp light).
>
> Without your patches, everything works fine on H6, and I never see
> crashes/lockups.
>
> I tired physically covering the IR receiver, and that helps preventing the
> crash. As soon as I uncover it, the crash happens again in 1s or so:
>
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
>
> This time I got the hung task and reboot: (probably not directly related)
>
> INFO: task find:560 blocked for more than 120 seconds.
>       Not tainted 5.2.0-rc2+ #7
> "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> find            D    0   560    551 0x00000000
> Call trace:
>  __switch_to+0x6c/0x90
>  __schedule+0x1f4/0x578
>  schedule+0x28/0xa8
>  io_schedule+0x18/0x38
>  __lock_page+0x12c/0x208
>  pagecache_get_page+0x238/0x2e8
>  __get_node_page+0x6c/0x310
>  f2fs_get_node_page+0x14/0x20
>  f2fs_iget+0x70/0xc60
>  f2fs_lookup+0xcc/0x218
>  __lookup_slow+0x78/0x160
>  lookup_slow+0x3c/0x60
>  walk_component+0x1e4/0x2e0
>  path_lookupat.isra.13+0x5c/0x1e0
>  filename_lookup.part.23+0x6c/0xe8
>  user_path_at_empty+0x4c/0x60
>  vfs_statx+0x78/0xd8
>  __se_sys_newfstatat+0x24/0x48
>  __arm64_sys_newfstatat+0x18/0x20
>  el0_svc_handler+0x9c/0x170
>  el0_svc+0x8/0xc
> Kernel panic - not syncing: hung_task: blocked tasks
> CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> Hardware name: OrangePi 3 (DT)
> Call trace:
>  dump_backtrace+0x0/0xf8
>  show_stack+0x14/0x20
>  dump_stack+0xa8/0xcc
>  panic+0x124/0x2dc
>  proc_dohung_task_timeout_secs+0x0/0x40
>  kthread+0x120/0x128
>  ret_from_fork+0x10/0x18
> SMP: stopping secondary CPUs
> Kernel Offset: disabled
> CPU features: 0x0002,20002000
> Memory Limit: none
> Rebooting in 3 seconds..
>
>
> Meanwhile H5 based board now runs for 15 minutes without issues.
>
> So to sum up:
>
> - these crashes are definitely H6 IR related
>   - the same kernel, on H5 works
>   - covering the sensor prevents the crashes on H6
>
> So we should probably hold on with the series, until this is figured out.

Thanks for testing, but I think it's more hardware related.
It seems that your IR is flooded or misconfigured for your board.
Could you add a simple print in the "sunxi_ir_irq"

If it's confirmed, maybe tweak the threshold configuration or
implement the new active_threshold will help.

With my hardware Beelink GS1 and on Jernej's board (A64) there is no issue.

I will disable all the other H6 boards until someone test it.

Regards,
Clément

>
> I have tried searching for differences between H3 and H6 BSPs. And there are some:
>
>                 break;
>         case IR_IRQ_FIFO_SIZE:
> -               irq_reg = sunxi_smc_readl(IR_BASE+IR_RXINTE_REG);
> -               irq_reg |= IR_FIFO_32;
> +               irq_reg = readl(reg_base + IR_RXINTE_REG);
> +               irq_reg |= IR_FIFO_20;
>                 break;
>         }
>
>         case IR_CLK_SAMPLE:
> -#ifdef FPGA_SIM_CONFIG
> -               sample_reg |= 0x3<<0;  /* Fsample = 24MHz/512 = 46875Hz (21.33us) */
> -#else
> -               sample_reg |= IR_SAMPLE_128;
> -#endif
> +               sample_reg |= IR_SAMPLE_DEV;
>                 break;
>
> +       case IR_BOTH_PULSE_MODE:
> +               ctrl_reg = readl(reg_base + IR_CTRL_REG);
> +               ctrl_reg |= IR_BOTH_PULSE;
> +               break;
> +       case IR_LOW_PULSE_MODE:
> +               ctrl_reg = readl(reg_base + IR_CTRL_REG);
> +               ctrl_reg |= IR_LOW_PULSE;
> +               break;
> +       case IR_HIGH_PULSE_MODE:
> +               ctrl_reg = readl(reg_base + IR_CTRL_REG);
> +               ctrl_reg |= IR_HIGH_PULSE;
> +               break;
>
>
> 0x0000 CIR_CTL
>
>   new bit 8 - CGPO
>     General Program Output (GPO) Control in CIR mode for TX Pin
>     0: Low level
>     1: High level
>
> CIR_RXSTA 0x0030
>
>   RAC is just 13:8 instead of 14:8
>
>
> I haven't looked deeper, because I have no use for IR on H6. But I hope this
> helps. I can help testing patches if you like.
>
> thank you and regards,
>         o.
>
> > regards,
> >       o.
> >
> > > Thanks,
> > > Clément
> > >
> > > >
> > > > Enabling/disabling ir node was enough to trigger/stop the RCU stalls on H6.
> > > >
> > > > regards,
> > > >         o.
> > > >
> > > > > Regards,
> > > > > Clément
> > > > >
> > > > > [1] https://lore.kernel.org/patchwork/patch/1031390/#1221464
> > > > >
> > > > > Changes since v1:
> > > > >  - Document reset lines as required since A31
> > > > >  - Explain the memory mapping difference in commit log
> > > > >  - Fix misspelling "Allwiner" to "Allwinner"
> > > > >
> > > > > Clément Péron (8):
> > > > >   dt-bindings: media: sunxi-ir: add A31 compatible
> > > > >   media: rc: sunxi: Add A31 compatible
> > > > >   ARM: dts: sunxi: prefer A31 instead of A13 for ir
> > > > >   dt-bindings: media: sunxi-ir: Add A64 compatible
> > > > >   dt-bindings: media: sunxi-ir: Add H6 compatible
> > > > >   arm64: dts: allwinner: h6: Add IR receiver node
> > > > >   arm64: dts: allwinner: h6: Enable IR on H6 boards
> > > > >   arm64: defconfig: enable IR SUNXI option
> > > > >
> > > > > Igors Makejevs (1):
> > > > >   arm64: dts: allwinner: a64: Add IR node
> > > > >
> > > > > Jernej Skrabec (1):
> > > > >   arm64: dts: allwinner: a64: Enable IR on Orange Pi Win
> > > > >
> > > > >  .../devicetree/bindings/media/sunxi-ir.txt    | 11 +++++++++--
> > > > >  arch/arm/boot/dts/sun6i-a31.dtsi              |  2 +-
> > > > >  arch/arm/boot/dts/sun8i-a83t.dtsi             |  2 +-
> > > > >  arch/arm/boot/dts/sun9i-a80.dtsi              |  2 +-
> > > > >  arch/arm/boot/dts/sunxi-h3-h5.dtsi            |  2 +-
> > > > >  .../dts/allwinner/sun50i-a64-orangepi-win.dts |  4 ++++
> > > > >  arch/arm64/boot/dts/allwinner/sun50i-a64.dtsi | 18 ++++++++++++++++++
> > > > >  .../dts/allwinner/sun50i-h6-beelink-gs1.dts   |  4 ++++
> > > > >  .../dts/allwinner/sun50i-h6-orangepi.dtsi     |  4 ++++
> > > > >  .../boot/dts/allwinner/sun50i-h6-pine-h64.dts |  4 ++++
> > > > >  arch/arm64/boot/dts/allwinner/sun50i-h6.dtsi  | 19 +++++++++++++++++++
> > > > >  arch/arm64/configs/defconfig                  |  1 +
> > > > >  drivers/media/rc/sunxi-cir.c                  |  1 +
> > > > >  13 files changed, 68 insertions(+), 6 deletions(-)
> > > > >
> > > > > --
> > > > > 2.20.1
> > > > >
> > > > >
> > > > > _______________________________________________
> > > > > linux-arm-kernel mailing list
> > > > > linux-arm-kernel@lists.infradead.org
> > > > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> > >
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@lists.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Ondřej Jirman]

Hi Clément,

On Mon, May 27, 2019 at 08:49:59PM +0200, Clément Péron wrote:
> Hi Ondrej,
> 
> >
> > I'm testing on Orange Pi 3.
> >
> > With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> > responding/serial console stops responding). I don't have RC controller to test
> > the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
> >
> > I tried booting multiple times. Other results:
> >
> > boot 2:
> >
> > - ssh hangs even before connecting (ethernet crashes/is reset)
> >
> > INFO: rcu_sched detected stalls on CPUs/tasks:
> > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> > dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> > rcu: blocking rcu_node structures:
> >  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> > rcu: blocking rcu_node structures:
> > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
> >
> > above messages appear regularly.
> >
> > boot 3:
> >
> > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
> >
> >
> > Sometimes serial console keeps working. Sometimes it locks up too (but not
> > frequently). Storage locks up always (any program that was not run before
> > the crash can't be started and lock up the kernel hard, programs that
> > were executed prior, can be run again).
> >
> >
> > Exactly the same kernel build on H5 seems to work (or at least I was not able to
> > trigger the crash). So this seems to be limited to H6 for now.
> >
> > I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> > lamp light).
> >
> > Without your patches, everything works fine on H6, and I never see
> > crashes/lockups.
> >
> > I tired physically covering the IR receiver, and that helps preventing the
> > crash. As soon as I uncover it, the crash happens again in 1s or so:
> >
> > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
> >
> > This time I got the hung task and reboot: (probably not directly related)
> >
> > INFO: task find:560 blocked for more than 120 seconds.
> >       Not tainted 5.2.0-rc2+ #7
> > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > find            D    0   560    551 0x00000000
> > Call trace:
> >  __switch_to+0x6c/0x90
> >  __schedule+0x1f4/0x578
> >  schedule+0x28/0xa8
> >  io_schedule+0x18/0x38
> >  __lock_page+0x12c/0x208
> >  pagecache_get_page+0x238/0x2e8
> >  __get_node_page+0x6c/0x310
> >  f2fs_get_node_page+0x14/0x20
> >  f2fs_iget+0x70/0xc60
> >  f2fs_lookup+0xcc/0x218
> >  __lookup_slow+0x78/0x160
> >  lookup_slow+0x3c/0x60
> >  walk_component+0x1e4/0x2e0
> >  path_lookupat.isra.13+0x5c/0x1e0
> >  filename_lookup.part.23+0x6c/0xe8
> >  user_path_at_empty+0x4c/0x60
> >  vfs_statx+0x78/0xd8
> >  __se_sys_newfstatat+0x24/0x48
> >  __arm64_sys_newfstatat+0x18/0x20
> >  el0_svc_handler+0x9c/0x170
> >  el0_svc+0x8/0xc
> > Kernel panic - not syncing: hung_task: blocked tasks
> > CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> > Hardware name: OrangePi 3 (DT)
> > Call trace:
> >  dump_backtrace+0x0/0xf8
> >  show_stack+0x14/0x20
> >  dump_stack+0xa8/0xcc
> >  panic+0x124/0x2dc
> >  proc_dohung_task_timeout_secs+0x0/0x40
> >  kthread+0x120/0x128
> >  ret_from_fork+0x10/0x18
> > SMP: stopping secondary CPUs
> > Kernel Offset: disabled
> > CPU features: 0x0002,20002000
> > Memory Limit: none
> > Rebooting in 3 seconds..
> >
> >
> > Meanwhile H5 based board now runs for 15 minutes without issues.
> >
> > So to sum up:
> >
> > - these crashes are definitely H6 IR related
> >   - the same kernel, on H5 works
> >   - covering the sensor prevents the crashes on H6
> >
> > So we should probably hold on with the series, until this is figured out.
> 
> Thanks for testing, but I think it's more hardware related.
> It seems that your IR is flooded or misconfigured for your board.
> Could you add a simple print in the "sunxi_ir_irq"

Yes, I get flood of IRQs with status = 0x30. (after I turn on the lamp,
but it persists even after I turn it off and cover the IR sensor).

That's weird, because on H6 in CIR_RXSTA, bit 5 is undefined but corresponding 
bit in CIR_RXINT is DRQ_EN (RX FIFO DMA Enable)

So I'm not sure what it could be flooded with and why IRQs keep being
fired, even with no sensor input after the FIFO is read.

regards,
	o.

> If it's confirmed, maybe tweak the threshold configuration or
> implement the new active_threshold will help.
> 
> With my hardware Beelink GS1 and on Jernej's board (A64) there is no issue.
> 
> I will disable all the other H6 boards until someone test it.
> 
> Regards,
> Clément

Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Ondřej Jirman]

Hi Clément,

On Mon, May 27, 2019 at 09:30:16PM +0200, verejna wrote:
> Hi Clément,
> 
> On Mon, May 27, 2019 at 08:49:59PM +0200, Clément Péron wrote:
> > Hi Ondrej,
> > 
> > >
> > > I'm testing on Orange Pi 3.
> > >
> > > With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> > > responding/serial console stops responding). I don't have RC controller to test
> > > the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
> > >
> > > I tried booting multiple times. Other results:
> > >
> > > boot 2:
> > >
> > > - ssh hangs even before connecting (ethernet crashes/is reset)
> > >
> > > INFO: rcu_sched detected stalls on CPUs/tasks:
> > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> > > dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> > > rcu: blocking rcu_node structures:
> > >  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> > > rcu: blocking rcu_node structures:
> > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
> > >
> > > above messages appear regularly.
> > >
> > > boot 3:
> > >
> > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
> > >
> > >
> > > Sometimes serial console keeps working. Sometimes it locks up too (but not
> > > frequently). Storage locks up always (any program that was not run before
> > > the crash can't be started and lock up the kernel hard, programs that
> > > were executed prior, can be run again).
> > >
> > >
> > > Exactly the same kernel build on H5 seems to work (or at least I was not able to
> > > trigger the crash). So this seems to be limited to H6 for now.
> > >
> > > I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> > > lamp light).
> > >
> > > Without your patches, everything works fine on H6, and I never see
> > > crashes/lockups.
> > >
> > > I tired physically covering the IR receiver, and that helps preventing the
> > > crash. As soon as I uncover it, the crash happens again in 1s or so:
> > >
> > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
> > >
> > > This time I got the hung task and reboot: (probably not directly related)
> > >
> > > INFO: task find:560 blocked for more than 120 seconds.
> > >       Not tainted 5.2.0-rc2+ #7
> > > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > find            D    0   560    551 0x00000000
> > > Call trace:
> > >  __switch_to+0x6c/0x90
> > >  __schedule+0x1f4/0x578
> > >  schedule+0x28/0xa8
> > >  io_schedule+0x18/0x38
> > >  __lock_page+0x12c/0x208
> > >  pagecache_get_page+0x238/0x2e8
> > >  __get_node_page+0x6c/0x310
> > >  f2fs_get_node_page+0x14/0x20
> > >  f2fs_iget+0x70/0xc60
> > >  f2fs_lookup+0xcc/0x218
> > >  __lookup_slow+0x78/0x160
> > >  lookup_slow+0x3c/0x60
> > >  walk_component+0x1e4/0x2e0
> > >  path_lookupat.isra.13+0x5c/0x1e0
> > >  filename_lookup.part.23+0x6c/0xe8
> > >  user_path_at_empty+0x4c/0x60
> > >  vfs_statx+0x78/0xd8
> > >  __se_sys_newfstatat+0x24/0x48
> > >  __arm64_sys_newfstatat+0x18/0x20
> > >  el0_svc_handler+0x9c/0x170
> > >  el0_svc+0x8/0xc
> > > Kernel panic - not syncing: hung_task: blocked tasks
> > > CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> > > Hardware name: OrangePi 3 (DT)
> > > Call trace:
> > >  dump_backtrace+0x0/0xf8
> > >  show_stack+0x14/0x20
> > >  dump_stack+0xa8/0xcc
> > >  panic+0x124/0x2dc
> > >  proc_dohung_task_timeout_secs+0x0/0x40
> > >  kthread+0x120/0x128
> > >  ret_from_fork+0x10/0x18
> > > SMP: stopping secondary CPUs
> > > Kernel Offset: disabled
> > > CPU features: 0x0002,20002000
> > > Memory Limit: none
> > > Rebooting in 3 seconds..
> > >
> > >
> > > Meanwhile H5 based board now runs for 15 minutes without issues.
> > >
> > > So to sum up:
> > >
> > > - these crashes are definitely H6 IR related
> > >   - the same kernel, on H5 works
> > >   - covering the sensor prevents the crashes on H6
> > >
> > > So we should probably hold on with the series, until this is figured out.
> > 
> > Thanks for testing, but I think it's more hardware related.
> > It seems that your IR is flooded or misconfigured for your board.
> > Could you add a simple print in the "sunxi_ir_irq"
> 
> Yes, I get flood of IRQs with status = 0x30. (after I turn on the lamp,
> but it persists even after I turn it off and cover the IR sensor).

Interestingly, status also contains RAC, and it's 0 in this case. So the 
interrupt if firing with "No available data in RX FIFO" repeatedly. Regardless
of input.

So there's something else up.

regards,
	o.

> That's weird, because on H6 in CIR_RXSTA, bit 5 is undefined but corresponding 
> bit in CIR_RXINT is DRQ_EN (RX FIFO DMA Enable)
> 
> So I'm not sure what it could be flooded with and why IRQs keep being
> fired, even with no sensor input after the FIFO is read.
> 
> regards,
> 	o.
> 
> > If it's confirmed, maybe tweak the threshold configuration or
> > implement the new active_threshold will help.
> > 
> > With my hardware Beelink GS1 and on Jernej's board (A64) there is no issue.
> > 
> > I will disable all the other H6 boards until someone test it.
> > 
> > Regards,
> > Clément
> 
> _______________________________________________
> linux-arm-kernel mailing list
> linux-arm-kernel@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

Re: [linux-sunxi] Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Clément Péron]

Hi Ondřej,

On Mon, 27 May 2019 at 21:53, 'Ondřej Jirman' via linux-sunxi
<linux-sunxi@googlegroups.com> wrote:
>
> Hi Clément,
>
> On Mon, May 27, 2019 at 09:30:16PM +0200, verejna wrote:
> > Hi Clément,
> >
> > On Mon, May 27, 2019 at 08:49:59PM +0200, Clément Péron wrote:
> > > Hi Ondrej,
> > >
> > > >
> > > > I'm testing on Orange Pi 3.
> > > >
> > > > With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> > > > responding/serial console stops responding). I don't have RC controller to test
> > > > the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
> > > >
> > > > I tried booting multiple times. Other results:
> > > >
> > > > boot 2:
> > > >
> > > > - ssh hangs even before connecting (ethernet crashes/is reset)
> > > >
> > > > INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> > > > dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> > > > rcu: blocking rcu_node structures:
> > > >  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> > > > rcu: blocking rcu_node structures:
> > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
> > > >
> > > > above messages appear regularly.
> > > >
> > > > boot 3:
> > > >
> > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
> > > >
> > > >
> > > > Sometimes serial console keeps working. Sometimes it locks up too (but not
> > > > frequently). Storage locks up always (any program that was not run before
> > > > the crash can't be started and lock up the kernel hard, programs that
> > > > were executed prior, can be run again).
> > > >
> > > >
> > > > Exactly the same kernel build on H5 seems to work (or at least I was not able to
> > > > trigger the crash). So this seems to be limited to H6 for now.
> > > >
> > > > I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> > > > lamp light).
> > > >
> > > > Without your patches, everything works fine on H6, and I never see
> > > > crashes/lockups.
> > > >
> > > > I tired physically covering the IR receiver, and that helps preventing the
> > > > crash. As soon as I uncover it, the crash happens again in 1s or so:
> > > >
> > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
> > > >
> > > > This time I got the hung task and reboot: (probably not directly related)
> > > >
> > > > INFO: task find:560 blocked for more than 120 seconds.
> > > >       Not tainted 5.2.0-rc2+ #7
> > > > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > > find            D    0   560    551 0x00000000
> > > > Call trace:
> > > >  __switch_to+0x6c/0x90
> > > >  __schedule+0x1f4/0x578
> > > >  schedule+0x28/0xa8
> > > >  io_schedule+0x18/0x38
> > > >  __lock_page+0x12c/0x208
> > > >  pagecache_get_page+0x238/0x2e8
> > > >  __get_node_page+0x6c/0x310
> > > >  f2fs_get_node_page+0x14/0x20
> > > >  f2fs_iget+0x70/0xc60
> > > >  f2fs_lookup+0xcc/0x218
> > > >  __lookup_slow+0x78/0x160
> > > >  lookup_slow+0x3c/0x60
> > > >  walk_component+0x1e4/0x2e0
> > > >  path_lookupat.isra.13+0x5c/0x1e0
> > > >  filename_lookup.part.23+0x6c/0xe8
> > > >  user_path_at_empty+0x4c/0x60
> > > >  vfs_statx+0x78/0xd8
> > > >  __se_sys_newfstatat+0x24/0x48
> > > >  __arm64_sys_newfstatat+0x18/0x20
> > > >  el0_svc_handler+0x9c/0x170
> > > >  el0_svc+0x8/0xc
> > > > Kernel panic - not syncing: hung_task: blocked tasks
> > > > CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> > > > Hardware name: OrangePi 3 (DT)
> > > > Call trace:
> > > >  dump_backtrace+0x0/0xf8
> > > >  show_stack+0x14/0x20
> > > >  dump_stack+0xa8/0xcc
> > > >  panic+0x124/0x2dc
> > > >  proc_dohung_task_timeout_secs+0x0/0x40
> > > >  kthread+0x120/0x128
> > > >  ret_from_fork+0x10/0x18
> > > > SMP: stopping secondary CPUs
> > > > Kernel Offset: disabled
> > > > CPU features: 0x0002,20002000
> > > > Memory Limit: none
> > > > Rebooting in 3 seconds..
> > > >
> > > >
> > > > Meanwhile H5 based board now runs for 15 minutes without issues.
> > > >
> > > > So to sum up:
> > > >
> > > > - these crashes are definitely H6 IR related
> > > >   - the same kernel, on H5 works
> > > >   - covering the sensor prevents the crashes on H6
> > > >
> > > > So we should probably hold on with the series, until this is figured out.
> > >
> > > Thanks for testing, but I think it's more hardware related.
> > > It seems that your IR is flooded or misconfigured for your board.
> > > Could you add a simple print in the "sunxi_ir_irq"
> >
> > Yes, I get flood of IRQs with status = 0x30. (after I turn on the lamp,
> > but it persists even after I turn it off and cover the IR sensor).
>
> Interestingly, status also contains RAC, and it's 0 in this case. So the
> interrupt if firing with "No available data in RX FIFO" repeatedly. Regardless
> of input.
>
> So there's something else up.

Really weird indeed...

I have pushed a new version, where I didn't enabled the support for
others H6 board and the cover letter include a link to this thread.

It would be great if other sunxi users could test this series, to
check if this issue in present in other OPi3 / Pine H64.

Regards,
Clément
>
> regards,
>         o.
>
> > That's weird, because on H6 in CIR_RXSTA, bit 5 is undefined but corresponding
> > bit in CIR_RXINT is DRQ_EN (RX FIFO DMA Enable)
> >
> > So I'm not sure what it could be flooded with and why IRQs keep being
> > fired, even with no sensor input after the FIFO is read.
> >
> > regards,
> >       o.
> >
> > > If it's confirmed, maybe tweak the threshold configuration or
> > > implement the new active_threshold will help.
> > >
> > > With my hardware Beelink GS1 and on Jernej's board (A64) there is no issue.
> > >
> > > I will disable all the other H6 boards until someone test it.
> > >
> > > Regards,
> > > Clément
> >
> > _______________________________________________
> > linux-arm-kernel mailing list
> > linux-arm-kernel@lists.infradead.org
> > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
>
> --
> You received this message because you are subscribed to the Google Groups "linux-sunxi" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscribe@googlegroups.com.
> To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/20190527195330.pugb7ypvnyv32fug%40core.my.home.
> For more options, visit https://groups.google.com/d/optout.

Re: [linux-sunxi] Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Ondřej Jirman]

Hello Clément,

On Tue, May 28, 2019 at 06:21:19PM +0200, Clément Péron wrote:
> Hi Ondřej,
> 
> On Mon, 27 May 2019 at 21:53, 'Ondřej Jirman' via linux-sunxi
> <linux-sunxi@googlegroups.com> wrote:
> >
> > Hi Clément,
> >
> > On Mon, May 27, 2019 at 09:30:16PM +0200, verejna wrote:
> > > Hi Clément,
> > >
> > > On Mon, May 27, 2019 at 08:49:59PM +0200, Clément Péron wrote:
> > > > Hi Ondrej,
> > > >
> > > > >
> > > > > I'm testing on Orange Pi 3.
> > > > >
> > > > > With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> > > > > responding/serial console stops responding). I don't have RC controller to test
> > > > > the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
> > > > >
> > > > > I tried booting multiple times. Other results:
> > > > >
> > > > > boot 2:
> > > > >
> > > > > - ssh hangs even before connecting (ethernet crashes/is reset)
> > > > >
> > > > > INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> > > > > dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> > > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> > > > > rcu: blocking rcu_node structures:
> > > > >  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> > > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> > > > > rcu: blocking rcu_node structures:
> > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
> > > > >
> > > > > above messages appear regularly.
> > > > >
> > > > > boot 3:
> > > > >
> > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
> > > > >
> > > > >
> > > > > Sometimes serial console keeps working. Sometimes it locks up too (but not
> > > > > frequently). Storage locks up always (any program that was not run before
> > > > > the crash can't be started and lock up the kernel hard, programs that
> > > > > were executed prior, can be run again).
> > > > >
> > > > >
> > > > > Exactly the same kernel build on H5 seems to work (or at least I was not able to
> > > > > trigger the crash). So this seems to be limited to H6 for now.
> > > > >
> > > > > I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> > > > > lamp light).
> > > > >
> > > > > Without your patches, everything works fine on H6, and I never see
> > > > > crashes/lockups.
> > > > >
> > > > > I tired physically covering the IR receiver, and that helps preventing the
> > > > > crash. As soon as I uncover it, the crash happens again in 1s or so:
> > > > >
> > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
> > > > >
> > > > > This time I got the hung task and reboot: (probably not directly related)
> > > > >
> > > > > INFO: task find:560 blocked for more than 120 seconds.
> > > > >       Not tainted 5.2.0-rc2+ #7
> > > > > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > > > find            D    0   560    551 0x00000000
> > > > > Call trace:
> > > > >  __switch_to+0x6c/0x90
> > > > >  __schedule+0x1f4/0x578
> > > > >  schedule+0x28/0xa8
> > > > >  io_schedule+0x18/0x38
> > > > >  __lock_page+0x12c/0x208
> > > > >  pagecache_get_page+0x238/0x2e8
> > > > >  __get_node_page+0x6c/0x310
> > > > >  f2fs_get_node_page+0x14/0x20
> > > > >  f2fs_iget+0x70/0xc60
> > > > >  f2fs_lookup+0xcc/0x218
> > > > >  __lookup_slow+0x78/0x160
> > > > >  lookup_slow+0x3c/0x60
> > > > >  walk_component+0x1e4/0x2e0
> > > > >  path_lookupat.isra.13+0x5c/0x1e0
> > > > >  filename_lookup.part.23+0x6c/0xe8
> > > > >  user_path_at_empty+0x4c/0x60
> > > > >  vfs_statx+0x78/0xd8
> > > > >  __se_sys_newfstatat+0x24/0x48
> > > > >  __arm64_sys_newfstatat+0x18/0x20
> > > > >  el0_svc_handler+0x9c/0x170
> > > > >  el0_svc+0x8/0xc
> > > > > Kernel panic - not syncing: hung_task: blocked tasks
> > > > > CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> > > > > Hardware name: OrangePi 3 (DT)
> > > > > Call trace:
> > > > >  dump_backtrace+0x0/0xf8
> > > > >  show_stack+0x14/0x20
> > > > >  dump_stack+0xa8/0xcc
> > > > >  panic+0x124/0x2dc
> > > > >  proc_dohung_task_timeout_secs+0x0/0x40
> > > > >  kthread+0x120/0x128
> > > > >  ret_from_fork+0x10/0x18
> > > > > SMP: stopping secondary CPUs
> > > > > Kernel Offset: disabled
> > > > > CPU features: 0x0002,20002000
> > > > > Memory Limit: none
> > > > > Rebooting in 3 seconds..
> > > > >
> > > > >
> > > > > Meanwhile H5 based board now runs for 15 minutes without issues.
> > > > >
> > > > > So to sum up:
> > > > >
> > > > > - these crashes are definitely H6 IR related
> > > > >   - the same kernel, on H5 works
> > > > >   - covering the sensor prevents the crashes on H6
> > > > >
> > > > > So we should probably hold on with the series, until this is figured out.
> > > >
> > > > Thanks for testing, but I think it's more hardware related.
> > > > It seems that your IR is flooded or misconfigured for your board.
> > > > Could you add a simple print in the "sunxi_ir_irq"
> > >
> > > Yes, I get flood of IRQs with status = 0x30. (after I turn on the lamp,
> > > but it persists even after I turn it off and cover the IR sensor).
> >
> > Interestingly, status also contains RAC, and it's 0 in this case. So the
> > interrupt if firing with "No available data in RX FIFO" repeatedly. Regardless
> > of input.
> >
> > So there's something else up.
> 
> Really weird indeed...
> 
> I have pushed a new version, where I didn't enabled the support for
> others H6 board and the cover letter include a link to this thread.
> 
> It would be great if other sunxi users could test this series, to
> check if this issue in present in other OPi3 / Pine H64.

I don't know if this is enough. I'd rather prefer if the driver has a way
of detecting this situation and shutting the module down, at the very least,
instead of taking down the entire system with IRQ flood.

It may be detectable by checking RAC == 0 when RX FIFO available interrupt
flag is set.

Otherwise, this will eventually be forgotten (cover letters are not even stored
in git), and someone will fall into the trap again, after enabling r_ir on
their board, and end up chasing their tail for a day. I've initially only found
this is IR driver issue after a long unpleasant debugging session, chasing other
more obvious ideas (as when this happens there's absolutely nothing in the log
indicating this is IR issue).

regards,
	o.

> Regards,
> Clément
> >
> > regards,
> >         o.
> >
> > > That's weird, because on H6 in CIR_RXSTA, bit 5 is undefined but corresponding
> > > bit in CIR_RXINT is DRQ_EN (RX FIFO DMA Enable)
> > >
> > > So I'm not sure what it could be flooded with and why IRQs keep being
> > > fired, even with no sensor input after the FIFO is read.
> > >
> > > regards,
> > >       o.
> > >
> > > > If it's confirmed, maybe tweak the threshold configuration or
> > > > implement the new active_threshold will help.
> > > >
> > > > With my hardware Beelink GS1 and on Jernej's board (A64) there is no issue.
> > > >
> > > > I will disable all the other H6 boards until someone test it.
> > > >
> > > > Regards,
> > > > Clément
> > >
> > > _______________________________________________
> > > linux-arm-kernel mailing list
> > > linux-arm-kernel@lists.infradead.org
> > > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
> >
> > --
> > You received this message because you are subscribed to the Google Groups "linux-sunxi" group.
> > To unsubscribe from this group and stop receiving emails from it, send an email to linux-sunxi+unsubscribe@googlegroups.com.
> > To view this discussion on the web, visit https://groups.google.com/d/msgid/linux-sunxi/20190527195330.pugb7ypvnyv32fug%40core.my.home.
> > For more options, visit https://groups.google.com/d/optout.
> 
> _______________________________________________
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Re: [linux-sunxi] Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Maxime Ripard]

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On Tue, May 28, 2019 at 08:04:47PM +0200, Ondřej Jirman wrote:
> Hello Clément,
>
> On Tue, May 28, 2019 at 06:21:19PM +0200, Clément Péron wrote:
> > Hi Ondřej,
> >
> > On Mon, 27 May 2019 at 21:53, 'Ondřej Jirman' via linux-sunxi
> > <linux-sunxi@googlegroups.com> wrote:
> > >
> > > Hi Clément,
> > >
> > > On Mon, May 27, 2019 at 09:30:16PM +0200, verejna wrote:
> > > > Hi Clément,
> > > >
> > > > On Mon, May 27, 2019 at 08:49:59PM +0200, Clément Péron wrote:
> > > > > Hi Ondrej,
> > > > >
> > > > > >
> > > > > > I'm testing on Orange Pi 3.
> > > > > >
> > > > > > With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> > > > > > responding/serial console stops responding). I don't have RC controller to test
> > > > > > the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
> > > > > >
> > > > > > I tried booting multiple times. Other results:
> > > > > >
> > > > > > boot 2:
> > > > > >
> > > > > > - ssh hangs even before connecting (ethernet crashes/is reset)
> > > > > >
> > > > > > INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> > > > > > dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> > > > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> > > > > > rcu: blocking rcu_node structures:
> > > > > >  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> > > > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> > > > > > rcu: blocking rcu_node structures:
> > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
> > > > > >
> > > > > > above messages appear regularly.
> > > > > >
> > > > > > boot 3:
> > > > > >
> > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
> > > > > >
> > > > > >
> > > > > > Sometimes serial console keeps working. Sometimes it locks up too (but not
> > > > > > frequently). Storage locks up always (any program that was not run before
> > > > > > the crash can't be started and lock up the kernel hard, programs that
> > > > > > were executed prior, can be run again).
> > > > > >
> > > > > >
> > > > > > Exactly the same kernel build on H5 seems to work (or at least I was not able to
> > > > > > trigger the crash). So this seems to be limited to H6 for now.
> > > > > >
> > > > > > I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> > > > > > lamp light).
> > > > > >
> > > > > > Without your patches, everything works fine on H6, and I never see
> > > > > > crashes/lockups.
> > > > > >
> > > > > > I tired physically covering the IR receiver, and that helps preventing the
> > > > > > crash. As soon as I uncover it, the crash happens again in 1s or so:
> > > > > >
> > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
> > > > > >
> > > > > > This time I got the hung task and reboot: (probably not directly related)
> > > > > >
> > > > > > INFO: task find:560 blocked for more than 120 seconds.
> > > > > >       Not tainted 5.2.0-rc2+ #7
> > > > > > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > > > > find            D    0   560    551 0x00000000
> > > > > > Call trace:
> > > > > >  __switch_to+0x6c/0x90
> > > > > >  __schedule+0x1f4/0x578
> > > > > >  schedule+0x28/0xa8
> > > > > >  io_schedule+0x18/0x38
> > > > > >  __lock_page+0x12c/0x208
> > > > > >  pagecache_get_page+0x238/0x2e8
> > > > > >  __get_node_page+0x6c/0x310
> > > > > >  f2fs_get_node_page+0x14/0x20
> > > > > >  f2fs_iget+0x70/0xc60
> > > > > >  f2fs_lookup+0xcc/0x218
> > > > > >  __lookup_slow+0x78/0x160
> > > > > >  lookup_slow+0x3c/0x60
> > > > > >  walk_component+0x1e4/0x2e0
> > > > > >  path_lookupat.isra.13+0x5c/0x1e0
> > > > > >  filename_lookup.part.23+0x6c/0xe8
> > > > > >  user_path_at_empty+0x4c/0x60
> > > > > >  vfs_statx+0x78/0xd8
> > > > > >  __se_sys_newfstatat+0x24/0x48
> > > > > >  __arm64_sys_newfstatat+0x18/0x20
> > > > > >  el0_svc_handler+0x9c/0x170
> > > > > >  el0_svc+0x8/0xc
> > > > > > Kernel panic - not syncing: hung_task: blocked tasks
> > > > > > CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> > > > > > Hardware name: OrangePi 3 (DT)
> > > > > > Call trace:
> > > > > >  dump_backtrace+0x0/0xf8
> > > > > >  show_stack+0x14/0x20
> > > > > >  dump_stack+0xa8/0xcc
> > > > > >  panic+0x124/0x2dc
> > > > > >  proc_dohung_task_timeout_secs+0x0/0x40
> > > > > >  kthread+0x120/0x128
> > > > > >  ret_from_fork+0x10/0x18
> > > > > > SMP: stopping secondary CPUs
> > > > > > Kernel Offset: disabled
> > > > > > CPU features: 0x0002,20002000
> > > > > > Memory Limit: none
> > > > > > Rebooting in 3 seconds..
> > > > > >
> > > > > >
> > > > > > Meanwhile H5 based board now runs for 15 minutes without issues.
> > > > > >
> > > > > > So to sum up:
> > > > > >
> > > > > > - these crashes are definitely H6 IR related
> > > > > >   - the same kernel, on H5 works
> > > > > >   - covering the sensor prevents the crashes on H6
> > > > > >
> > > > > > So we should probably hold on with the series, until this is figured out.
> > > > >
> > > > > Thanks for testing, but I think it's more hardware related.
> > > > > It seems that your IR is flooded or misconfigured for your board.
> > > > > Could you add a simple print in the "sunxi_ir_irq"
> > > >
> > > > Yes, I get flood of IRQs with status = 0x30. (after I turn on the lamp,
> > > > but it persists even after I turn it off and cover the IR sensor).
> > >
> > > Interestingly, status also contains RAC, and it's 0 in this case. So the
> > > interrupt if firing with "No available data in RX FIFO" repeatedly. Regardless
> > > of input.
> > >
> > > So there's something else up.
> >
> > Really weird indeed...
> >
> > I have pushed a new version, where I didn't enabled the support for
> > others H6 board and the cover letter include a link to this thread.
> >
> > It would be great if other sunxi users could test this series, to
> > check if this issue in present in other OPi3 / Pine H64.
>
> I don't know if this is enough. I'd rather prefer if the driver has a way
> of detecting this situation and shutting the module down, at the very least,
> instead of taking down the entire system with IRQ flood.
>
> It may be detectable by checking RAC == 0 when RX FIFO available interrupt
> flag is set.
>
> Otherwise, this will eventually be forgotten (cover letters are not even stored
> in git), and someone will fall into the trap again, after enabling r_ir on
> their board, and end up chasing their tail for a day. I've initially only found
> this is IR driver issue after a long unpleasant debugging session, chasing other
> more obvious ideas (as when this happens there's absolutely nothing in the log
> indicating this is IR issue).

Returning IRQ_NONE in the handler will disable the interrupt line
after 100,000 (I think?) occurences. That might be a good workaround,
but we definitely want to have a comment there :)

Maxime

--
Maxime Ripard, Bootlin
Embedded Linux and Kernel engineering
https://bootlin.com

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Re: [linux-sunxi] Re: [PATCH v2 00/10] Allwinner A64/H6 IR support

[Clément Péron]

Hi,

On Wed, 29 May 2019 at 09:19, Maxime Ripard <maxime.ripard@bootlin.com> wrote:
>
> On Tue, May 28, 2019 at 08:04:47PM +0200, Ondřej Jirman wrote:
> > Hello Clément,
> >
> > On Tue, May 28, 2019 at 06:21:19PM +0200, Clément Péron wrote:
> > > Hi Ondřej,
> > >
> > > On Mon, 27 May 2019 at 21:53, 'Ondřej Jirman' via linux-sunxi
> > > <linux-sunxi@googlegroups.com> wrote:
> > > >
> > > > Hi Clément,
> > > >
> > > > On Mon, May 27, 2019 at 09:30:16PM +0200, verejna wrote:
> > > > > Hi Clément,
> > > > >
> > > > > On Mon, May 27, 2019 at 08:49:59PM +0200, Clément Péron wrote:
> > > > > > Hi Ondrej,
> > > > > >
> > > > > > >
> > > > > > > I'm testing on Orange Pi 3.
> > > > > > >
> > > > > > > With your patches, I get kernel lockup after ~1 minute of use (ssh stops
> > > > > > > responding/serial console stops responding). I don't have RC controller to test
> > > > > > > the CIR. But just enabling the CIR causes kernel to hang shortly after boot.
> > > > > > >
> > > > > > > I tried booting multiple times. Other results:
> > > > > > >
> > > > > > > boot 2:
> > > > > > >
> > > > > > > - ssh hangs even before connecting (ethernet crashes/is reset)
> > > > > > >
> > > > > > > INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=2437
> > > > > > > dwmac-sun8i 5020000.ethernet eth0: Reset adapter.
> > > > > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 5696 jiffies s: 81 root: 0x1/.
> > > > > > > rcu: blocking rcu_node structures:
> > > > > > >  rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=9714
> > > > > > > rcu: INFO: rcu_sched detected expedited stalls on CPUs/tasks: { 0-... } 21568 jiffies s: 81 root: 0x1/.
> > > > > > > rcu: blocking rcu_node structures:
> > > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > > rcu:    0-....: (1 GPs behind) idle=64a/0/0x3 softirq=4091/4091 fqs=17203
> > > > > > >
> > > > > > > above messages appear regularly.
> > > > > > >
> > > > > > > boot 3:
> > > > > > >
> > > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > > rcu:    0-....: (9 GPs behind) idle=992/0/0x3 softirq=6123/6123 fqs=2600
> > > > > > >
> > > > > > >
> > > > > > > Sometimes serial console keeps working. Sometimes it locks up too (but not
> > > > > > > frequently). Storage locks up always (any program that was not run before
> > > > > > > the crash can't be started and lock up the kernel hard, programs that
> > > > > > > were executed prior, can be run again).
> > > > > > >
> > > > > > >
> > > > > > > Exactly the same kernel build on H5 seems to work (or at least I was not able to
> > > > > > > trigger the crash). So this seems to be limited to H6 for now.
> > > > > > >
> > > > > > > I suspect that the crash occurs sooner if I vary the light (turn on/off the table
> > > > > > > lamp light).
> > > > > > >
> > > > > > > Without your patches, everything works fine on H6, and I never see
> > > > > > > crashes/lockups.
> > > > > > >
> > > > > > > I tired physically covering the IR receiver, and that helps preventing the
> > > > > > > crash. As soon as I uncover it, the crash happens again in 1s or so:
> > > > > > >
> > > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=2444
> > > > > > > rcu: INFO: rcu_sched detected stalls on CPUs/tasks:
> > > > > > > rcu:    0-....: (1 GPs behind) idle=4ea/0/0x3 softirq=4483/4484 fqs=9777
> > > > > > >
> > > > > > > This time I got the hung task and reboot: (probably not directly related)
> > > > > > >
> > > > > > > INFO: task find:560 blocked for more than 120 seconds.
> > > > > > >       Not tainted 5.2.0-rc2+ #7
> > > > > > > "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
> > > > > > > find            D    0   560    551 0x00000000
> > > > > > > Call trace:
> > > > > > >  __switch_to+0x6c/0x90
> > > > > > >  __schedule+0x1f4/0x578
> > > > > > >  schedule+0x28/0xa8
> > > > > > >  io_schedule+0x18/0x38
> > > > > > >  __lock_page+0x12c/0x208
> > > > > > >  pagecache_get_page+0x238/0x2e8
> > > > > > >  __get_node_page+0x6c/0x310
> > > > > > >  f2fs_get_node_page+0x14/0x20
> > > > > > >  f2fs_iget+0x70/0xc60
> > > > > > >  f2fs_lookup+0xcc/0x218
> > > > > > >  __lookup_slow+0x78/0x160
> > > > > > >  lookup_slow+0x3c/0x60
> > > > > > >  walk_component+0x1e4/0x2e0
> > > > > > >  path_lookupat.isra.13+0x5c/0x1e0
> > > > > > >  filename_lookup.part.23+0x6c/0xe8
> > > > > > >  user_path_at_empty+0x4c/0x60
> > > > > > >  vfs_statx+0x78/0xd8
> > > > > > >  __se_sys_newfstatat+0x24/0x48
> > > > > > >  __arm64_sys_newfstatat+0x18/0x20
> > > > > > >  el0_svc_handler+0x9c/0x170
> > > > > > >  el0_svc+0x8/0xc
> > > > > > > Kernel panic - not syncing: hung_task: blocked tasks
> > > > > > > CPU: 1 PID: 34 Comm: khungtaskd Not tainted 5.2.0-rc2+ #7
> > > > > > > Hardware name: OrangePi 3 (DT)
> > > > > > > Call trace:
> > > > > > >  dump_backtrace+0x0/0xf8
> > > > > > >  show_stack+0x14/0x20
> > > > > > >  dump_stack+0xa8/0xcc
> > > > > > >  panic+0x124/0x2dc
> > > > > > >  proc_dohung_task_timeout_secs+0x0/0x40
> > > > > > >  kthread+0x120/0x128
> > > > > > >  ret_from_fork+0x10/0x18
> > > > > > > SMP: stopping secondary CPUs
> > > > > > > Kernel Offset: disabled
> > > > > > > CPU features: 0x0002,20002000
> > > > > > > Memory Limit: none
> > > > > > > Rebooting in 3 seconds..
> > > > > > >
> > > > > > >
> > > > > > > Meanwhile H5 based board now runs for 15 minutes without issues.
> > > > > > >
> > > > > > > So to sum up:
> > > > > > >
> > > > > > > - these crashes are definitely H6 IR related
> > > > > > >   - the same kernel, on H5 works
> > > > > > >   - covering the sensor prevents the crashes on H6
> > > > > > >
> > > > > > > So we should probably hold on with the series, until this is figured out.
> > > > > >
> > > > > > Thanks for testing, but I think it's more hardware related.
> > > > > > It seems that your IR is flooded or misconfigured for your board.
> > > > > > Could you add a simple print in the "sunxi_ir_irq"
> > > > >
> > > > > Yes, I get flood of IRQs with status = 0x30. (after I turn on the lamp,
> > > > > but it persists even after I turn it off and cover the IR sensor).
> > > >
> > > > Interestingly, status also contains RAC, and it's 0 in this case. So the
> > > > interrupt if firing with "No available data in RX FIFO" repeatedly. Regardless
> > > > of input.
> > > >
> > > > So there's something else up.
> > >
> > > Really weird indeed...
> > >
> > > I have pushed a new version, where I didn't enabled the support for
> > > others H6 board and the cover letter include a link to this thread.
> > >
> > > It would be great if other sunxi users could test this series, to
> > > check if this issue in present in other OPi3 / Pine H64.
> >
> > I don't know if this is enough. I'd rather prefer if the driver has a way
> > of detecting this situation and shutting the module down, at the very least,
> > instead of taking down the entire system with IRQ flood.
> >
> > It may be detectable by checking RAC == 0 when RX FIFO available interrupt
> > flag is set.
> >
> > Otherwise, this will eventually be forgotten (cover letters are not even stored
> > in git), and someone will fall into the trap again, after enabling r_ir on
> > their board, and end up chasing their tail for a day. I've initially only found
> > this is IR driver issue after a long unpleasant debugging session, chasing other
> > more obvious ideas (as when this happens there's absolutely nothing in the log
> > indicating this is IR issue).
>
> Returning IRQ_NONE in the handler will disable the interrupt line
> after 100,000 (I think?) occurences. That might be a good workaround,
> but we definitely want to have a comment there :)
>

Thanks for the suggestion,

I will propose a patch to return IRQ_NONE if Fifo is empty when RA is setted.

Just a comment in the IRQ handling we are actually looking at the
RXSTA register and using the RXINT bit ?
Is there any reason for doing that ?

Thanks,
Clément


> Maxime
>
> --
> Maxime Ripard, Bootlin
> Embedded Linux and Kernel engineering
> https://bootlin.com