* [PATCH 2/5] drivers: thermal: tsens: Add support for combined interrupt
2022-04-30 20:50 [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Robert Marko
@ 2022-04-30 20:50 ` Robert Marko
2022-04-30 20:50 ` [PATCH 3/5] drivers: thermal: tsens: allow configuring min and max trips Robert Marko
` (3 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Robert Marko @ 2022-04-30 20:50 UTC (permalink / raw)
To: agross, bjorn.andersson, amitk, thara.gopinath, rafael,
daniel.lezcano, rui.zhang, robh+dt, krzysztof.kozlowski+dt,
linux-arm-msm, linux-pm, devicetree, linux-kernel
Cc: Robert Marko
Despite using tsens v2.3 IP, IPQ8074 and IPQ6018 only have one IRQ for
signaling both up/low and critical trips.
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
drivers/thermal/qcom/tsens-8960.c | 1 +
drivers/thermal/qcom/tsens-v0_1.c | 1 +
drivers/thermal/qcom/tsens-v1.c | 1 +
drivers/thermal/qcom/tsens-v2.c | 1 +
drivers/thermal/qcom/tsens.c | 37 ++++++++++++++++++++++++++-----
drivers/thermal/qcom/tsens.h | 2 ++
6 files changed, 37 insertions(+), 6 deletions(-)
diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index 67c1748cdf73..ee584e5b07e5 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -269,6 +269,7 @@ static const struct tsens_ops ops_8960 = {
static struct tsens_features tsens_8960_feat = {
.ver_major = VER_0,
.crit_int = 0,
+ .combo_int = 0,
.adc = 1,
.srot_split = 0,
.max_sensors = 11,
diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
index f136cb350238..6effb822bf3c 100644
--- a/drivers/thermal/qcom/tsens-v0_1.c
+++ b/drivers/thermal/qcom/tsens-v0_1.c
@@ -539,6 +539,7 @@ static int calibrate_9607(struct tsens_priv *priv)
static struct tsens_features tsens_v0_1_feat = {
.ver_major = VER_0_1,
.crit_int = 0,
+ .combo_int = 0,
.adc = 1,
.srot_split = 1,
.max_sensors = 11,
diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index 573e261ccca7..a4f561a6e582 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -302,6 +302,7 @@ static int calibrate_8976(struct tsens_priv *priv)
static struct tsens_features tsens_v1_feat = {
.ver_major = VER_1_X,
.crit_int = 0,
+ .combo_int = 0,
.adc = 1,
.srot_split = 1,
.max_sensors = 11,
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index b293ed32174b..129cdb247381 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -31,6 +31,7 @@
static struct tsens_features tsens_v2_feat = {
.ver_major = VER_2_X,
.crit_int = 1,
+ .combo_int = 0,
.adc = 0,
.srot_split = 1,
.max_sensors = 16,
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 154d3cb19c88..69b6f7b97e9e 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -532,6 +532,26 @@ static irqreturn_t tsens_irq_thread(int irq, void *data)
return IRQ_HANDLED;
}
+/**
+ * tsens_combined_irq_thread - Threaded interrupt handler for combined interrupts
+ * @irq: irq number
+ * @data: tsens controller private data
+ *
+ * Handle the combined interrupt as if it were 2 separate interrupts, so call the
+ * critical handler first and then the up/low one.
+ *
+ * Return: IRQ_HANDLED
+ */
+static irqreturn_t tsens_combined_irq_thread(int irq, void *data)
+{
+ irqreturn_t ret;
+
+ ret = tsens_critical_irq_thread(irq, data);
+ ret = tsens_irq_thread(irq, data);
+
+ return ret;
+}
+
static int tsens_set_trips(void *_sensor, int low, int high)
{
struct tsens_sensor *s = _sensor;
@@ -1080,13 +1100,18 @@ static int tsens_register(struct tsens_priv *priv)
tsens_mC_to_hw(priv->sensor, 0));
}
- ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
- if (ret < 0)
- return ret;
+ if (priv->feat->combo_int) {
+ ret = tsens_register_irq(priv, "combined",
+ tsens_combined_irq_thread);
+ } else {
+ ret = tsens_register_irq(priv, "uplow", tsens_irq_thread);
+ if (ret < 0)
+ return ret;
- if (priv->feat->crit_int)
- ret = tsens_register_irq(priv, "critical",
- tsens_critical_irq_thread);
+ if (priv->feat->crit_int)
+ ret = tsens_register_irq(priv, "critical",
+ tsens_critical_irq_thread);
+ }
return ret;
}
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 1471a2c00f15..4614177944d6 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -495,6 +495,7 @@ enum regfield_ids {
* struct tsens_features - Features supported by the IP
* @ver_major: Major number of IP version
* @crit_int: does the IP support critical interrupts?
+ * @combo_int: does the IP use one IRQ for up, low and critical thresholds?
* @adc: do the sensors only output adc code (instead of temperature)?
* @srot_split: does the IP neatly splits the register space into SROT and TM,
* with SROT only being available to secure boot firmware?
@@ -504,6 +505,7 @@ enum regfield_ids {
struct tsens_features {
unsigned int ver_major;
unsigned int crit_int:1;
+ unsigned int combo_int:1;
unsigned int adc:1;
unsigned int srot_split:1;
unsigned int has_watchdog:1;
--
2.35.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 3/5] drivers: thermal: tsens: allow configuring min and max trips
2022-04-30 20:50 [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Robert Marko
2022-04-30 20:50 ` [PATCH 2/5] drivers: thermal: tsens: Add support for combined interrupt Robert Marko
@ 2022-04-30 20:50 ` Robert Marko
2022-04-30 20:51 ` [PATCH 4/5] drivers: thermal: tsens: add IPQ8074 support Robert Marko
` (2 subsequent siblings)
4 siblings, 0 replies; 6+ messages in thread
From: Robert Marko @ 2022-04-30 20:50 UTC (permalink / raw)
To: agross, bjorn.andersson, amitk, thara.gopinath, rafael,
daniel.lezcano, rui.zhang, robh+dt, krzysztof.kozlowski+dt,
linux-arm-msm, linux-pm, devicetree, linux-kernel
Cc: Robert Marko
IPQ8074 and IPQ6018 dont support negative trip temperatures and support
up to 204 degrees C as the max trip temperature.
So, instead of always setting the -40 as min and 120 degrees C as max
allow it to be configured as part of the features.
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
drivers/thermal/qcom/tsens-8960.c | 2 ++
drivers/thermal/qcom/tsens-v0_1.c | 2 ++
drivers/thermal/qcom/tsens-v1.c | 2 ++
drivers/thermal/qcom/tsens-v2.c | 2 ++
drivers/thermal/qcom/tsens.c | 4 ++--
drivers/thermal/qcom/tsens.h | 4 ++++
6 files changed, 14 insertions(+), 2 deletions(-)
diff --git a/drivers/thermal/qcom/tsens-8960.c b/drivers/thermal/qcom/tsens-8960.c
index ee584e5b07e5..4585904fb380 100644
--- a/drivers/thermal/qcom/tsens-8960.c
+++ b/drivers/thermal/qcom/tsens-8960.c
@@ -273,6 +273,8 @@ static struct tsens_features tsens_8960_feat = {
.adc = 1,
.srot_split = 0,
.max_sensors = 11,
+ .trip_min_temp = -40000,
+ .trip_max_temp = 120000,
};
struct tsens_plat_data data_8960 = {
diff --git a/drivers/thermal/qcom/tsens-v0_1.c b/drivers/thermal/qcom/tsens-v0_1.c
index 6effb822bf3c..2c203ff374e6 100644
--- a/drivers/thermal/qcom/tsens-v0_1.c
+++ b/drivers/thermal/qcom/tsens-v0_1.c
@@ -543,6 +543,8 @@ static struct tsens_features tsens_v0_1_feat = {
.adc = 1,
.srot_split = 1,
.max_sensors = 11,
+ .trip_min_temp = -40000,
+ .trip_max_temp = 120000,
};
static const struct reg_field tsens_v0_1_regfields[MAX_REGFIELDS] = {
diff --git a/drivers/thermal/qcom/tsens-v1.c b/drivers/thermal/qcom/tsens-v1.c
index a4f561a6e582..1d7f8a80bd13 100644
--- a/drivers/thermal/qcom/tsens-v1.c
+++ b/drivers/thermal/qcom/tsens-v1.c
@@ -306,6 +306,8 @@ static struct tsens_features tsens_v1_feat = {
.adc = 1,
.srot_split = 1,
.max_sensors = 11,
+ .trip_min_temp = -40000,
+ .trip_max_temp = 120000,
};
static const struct reg_field tsens_v1_regfields[MAX_REGFIELDS] = {
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index 129cdb247381..9babc69bfd22 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -35,6 +35,8 @@ static struct tsens_features tsens_v2_feat = {
.adc = 0,
.srot_split = 1,
.max_sensors = 16,
+ .trip_min_temp = -40000,
+ .trip_max_temp = 120000,
};
static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index 69b6f7b97e9e..b7701d5efdfc 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -572,8 +572,8 @@ static int tsens_set_trips(void *_sensor, int low, int high)
dev_dbg(dev, "[%u] %s: proposed thresholds: (%d:%d)\n",
hw_id, __func__, low, high);
- cl_high = clamp_val(high, -40000, 120000);
- cl_low = clamp_val(low, -40000, 120000);
+ cl_high = clamp_val(high, priv->feat->trip_min_temp, priv->feat->trip_max_temp);
+ cl_low = clamp_val(low, priv->feat->trip_min_temp, priv->feat->trip_max_temp);
high_val = tsens_mC_to_hw(s, cl_high);
low_val = tsens_mC_to_hw(s, cl_low);
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 4614177944d6..747004476347 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -501,6 +501,8 @@ enum regfield_ids {
* with SROT only being available to secure boot firmware?
* @has_watchdog: does this IP support watchdog functionality?
* @max_sensors: maximum sensors supported by this version of the IP
+ * @trip_min_temp: minimum trip temperature supported by this version of the IP
+ * @trip_max_temp: maximum trip temperature supported by this version of the IP
*/
struct tsens_features {
unsigned int ver_major;
@@ -510,6 +512,8 @@ struct tsens_features {
unsigned int srot_split:1;
unsigned int has_watchdog:1;
unsigned int max_sensors;
+ int trip_min_temp;
+ int trip_max_temp;
};
/**
--
2.35.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 4/5] drivers: thermal: tsens: add IPQ8074 support
2022-04-30 20:50 [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Robert Marko
2022-04-30 20:50 ` [PATCH 2/5] drivers: thermal: tsens: Add support for combined interrupt Robert Marko
2022-04-30 20:50 ` [PATCH 3/5] drivers: thermal: tsens: allow configuring min and max trips Robert Marko
@ 2022-04-30 20:51 ` Robert Marko
2022-04-30 20:51 ` [PATCH 5/5] arm64: dts: ipq8074: add thermal nodes Robert Marko
2022-05-01 8:33 ` [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Krzysztof Kozlowski
4 siblings, 0 replies; 6+ messages in thread
From: Robert Marko @ 2022-04-30 20:51 UTC (permalink / raw)
To: agross, bjorn.andersson, amitk, thara.gopinath, rafael,
daniel.lezcano, rui.zhang, robh+dt, krzysztof.kozlowski+dt,
linux-arm-msm, linux-pm, devicetree, linux-kernel
Cc: Robert Marko
Qualcomm IPQ8074 uses tsens v2.3 IP, however unlike other tsens v2 IP
it only has one IRQ, that is used for up/low as well as critical.
It also does not support negative trip temperatures.
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
drivers/thermal/qcom/tsens-v2.c | 17 +++++++++++++++++
drivers/thermal/qcom/tsens.c | 3 +++
drivers/thermal/qcom/tsens.h | 2 +-
3 files changed, 21 insertions(+), 1 deletion(-)
diff --git a/drivers/thermal/qcom/tsens-v2.c b/drivers/thermal/qcom/tsens-v2.c
index 9babc69bfd22..29a61d2d6ca3 100644
--- a/drivers/thermal/qcom/tsens-v2.c
+++ b/drivers/thermal/qcom/tsens-v2.c
@@ -39,6 +39,17 @@ static struct tsens_features tsens_v2_feat = {
.trip_max_temp = 120000,
};
+static struct tsens_features ipq8074_feat = {
+ .ver_major = VER_2_X,
+ .crit_int = 1,
+ .combo_int = 1,
+ .adc = 0,
+ .srot_split = 1,
+ .max_sensors = 16,
+ .trip_min_temp = 0,
+ .trip_max_temp = 204000,
+};
+
static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
/* ----- SROT ------ */
/* VERSION */
@@ -104,6 +115,12 @@ struct tsens_plat_data data_tsens_v2 = {
.fields = tsens_v2_regfields,
};
+struct tsens_plat_data data_ipq8074 = {
+ .ops = &ops_generic_v2,
+ .feat = &ipq8074_feat,
+ .fields = tsens_v2_regfields,
+};
+
/* Kept around for backward compatibility with old msm8996.dtsi */
struct tsens_plat_data data_8996 = {
.num_sensors = 13,
diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c
index b7701d5efdfc..3624daaaf34b 100644
--- a/drivers/thermal/qcom/tsens.c
+++ b/drivers/thermal/qcom/tsens.c
@@ -990,6 +990,9 @@ static const struct of_device_id tsens_table[] = {
{
.compatible = "qcom,ipq8064-tsens",
.data = &data_8960,
+ }, {
+ .compatible = "qcom,ipq8074-tsens",
+ .data = &data_ipq8074,
}, {
.compatible = "qcom,mdm9607-tsens",
.data = &data_9607,
diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h
index 747004476347..8dd990d944ad 100644
--- a/drivers/thermal/qcom/tsens.h
+++ b/drivers/thermal/qcom/tsens.h
@@ -599,6 +599,6 @@ extern struct tsens_plat_data data_8916, data_8939, data_8974, data_9607;
extern struct tsens_plat_data data_tsens_v1, data_8976;
/* TSENS v2 targets */
-extern struct tsens_plat_data data_8996, data_tsens_v2;
+extern struct tsens_plat_data data_8996, data_ipq8074, data_tsens_v2;
#endif /* __QCOM_TSENS_H__ */
--
2.35.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* [PATCH 5/5] arm64: dts: ipq8074: add thermal nodes
2022-04-30 20:50 [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Robert Marko
` (2 preceding siblings ...)
2022-04-30 20:51 ` [PATCH 4/5] drivers: thermal: tsens: add IPQ8074 support Robert Marko
@ 2022-04-30 20:51 ` Robert Marko
2022-05-01 8:33 ` [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Krzysztof Kozlowski
4 siblings, 0 replies; 6+ messages in thread
From: Robert Marko @ 2022-04-30 20:51 UTC (permalink / raw)
To: agross, bjorn.andersson, amitk, thara.gopinath, rafael,
daniel.lezcano, rui.zhang, robh+dt, krzysztof.kozlowski+dt,
linux-arm-msm, linux-pm, devicetree, linux-kernel
Cc: Robert Marko
IPQ8074 has a tsens v2.3.0 peripheral which monitors
temperatures around the various subsystems on the
die.
So lets add the tsens and thermal zone nodes, passive
CPU cooling will come in later patches after CPU frequency
scaling is supported.
Signed-off-by: Robert Marko <robimarko@gmail.com>
---
arch/arm64/boot/dts/qcom/ipq8074.dtsi | 96 +++++++++++++++++++++++++++
1 file changed, 96 insertions(+)
diff --git a/arch/arm64/boot/dts/qcom/ipq8074.dtsi b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
index afbae86cf6d3..76e02490b968 100644
--- a/arch/arm64/boot/dts/qcom/ipq8074.dtsi
+++ b/arch/arm64/boot/dts/qcom/ipq8074.dtsi
@@ -332,6 +332,16 @@ prng: rng@e3000 {
status = "disabled";
};
+ tsens: thermal-sensor@4a9000 {
+ compatible = "qcom,ipq8074-tsens";
+ reg = <0x4a9000 0x1000>, /* TM */
+ <0x4a8000 0x1000>; /* SROT */
+ interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "combined";
+ #qcom,sensors = <16>;
+ #thermal-sensor-cells = <1>;
+ };
+
cryptobam: dma-controller@704000 {
compatible = "qcom,bam-v1.7.0";
reg = <0x00704000 0x20000>;
@@ -1092,4 +1102,90 @@ wifi: wifi@c0000000 {
status = "disabled";
};
};
+
+ thermal-zones {
+ nss-top-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 4>;
+ };
+
+ nss0-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 5>;
+ };
+
+ nss1-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 6>;
+ };
+
+ wcss-phya0-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 7>;
+ };
+
+ wcss-phya1-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 8>;
+ };
+
+ cpu0_thermal: cpu0-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 9>;
+ };
+
+ cpu1_thermal: cpu1-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 10>;
+ };
+
+ cpu2_thermal: cpu2-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 11>;
+ };
+
+ cpu3_thermal: cpu3-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 12>;
+ };
+
+ cluster_thermal: cluster-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 13>;
+ };
+
+ wcss-phyb0-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 14>;
+ };
+
+ wcss-phyb1-thermal {
+ polling-delay-passive = <250>;
+ polling-delay = <1000>;
+
+ thermal-sensors = <&tsens 15>;
+ };
+ };
};
--
2.35.1
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible
2022-04-30 20:50 [PATCH 1/5] dt-bindings: thermal: tsens: Add ipq8074 compatible Robert Marko
` (3 preceding siblings ...)
2022-04-30 20:51 ` [PATCH 5/5] arm64: dts: ipq8074: add thermal nodes Robert Marko
@ 2022-05-01 8:33 ` Krzysztof Kozlowski
4 siblings, 0 replies; 6+ messages in thread
From: Krzysztof Kozlowski @ 2022-05-01 8:33 UTC (permalink / raw)
To: Robert Marko, agross, bjorn.andersson, amitk, thara.gopinath,
rafael, daniel.lezcano, rui.zhang, robh+dt,
krzysztof.kozlowski+dt, linux-arm-msm, linux-pm, devicetree,
linux-kernel
On 30/04/2022 22:50, Robert Marko wrote:
> Qualcomm IPQ8074 has tsens v2.3.0 block, though unlike existing v2 IP it
> only uses one IRQ, so tsens v2 compatible cannot be used as the fallback.
>
> We also have to make sure that correct interrupts are set according to
> compatibles, so populate interrupt information per compatibles.
>
> Signed-off-by: Robert Marko <robimarko@gmail.com>
> ---
> .../bindings/thermal/qcom-tsens.yaml | 79 ++++++++++++++++---
> 1 file changed, 68 insertions(+), 11 deletions(-)
>
> diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
> index b6406bcc683f..44ebdfd4560a 100644
> --- a/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
> +++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.yaml
> @@ -56,22 +56,19 @@ properties:
> - qcom,sm8350-tsens
> - const: qcom,tsens-v2
>
> + - description: v2 of TSENS with combined interrupt
> + items:
It's just an enum, no list here.
> + - enum:
> + - qcom,ipq8074-tsens
> +
> reg:
> items:
> - description: TM registers
> - description: SROT registers
>
> - interrupts:
> - minItems: 1
> - items:
> - - description: Combined interrupt if upper or lower threshold crossed
> - - description: Interrupt if critical threshold crossed
> + interrupts: true
minItems: 1
maxItems: 2
>
> - interrupt-names:
> - minItems: 1
> - items:
> - - const: uplow
> - - const: critical
> + interrupt-names: true
minItems: 1
maxItems: 2
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 6+ messages in thread