HSBIAS_SENSE_EN configures HSBIAS output current sense through
the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce
the potential pop noise during the headset plug out slowly. But on some
platforms ESD voltage will affect it causing test to fail, especially
with CTIA headset type. For different hardware setups, a designer might
want to tweak default behavior.
Signed-off-by: Vitaly Rodionov <[email protected]>
---
Documentation/devicetree/bindings/sound/cs42l42.txt | 7 +++++++
sound/soc/codecs/cs42l42.c | 7 ++++++-
sound/soc/codecs/cs42l42.h | 1 +
3 files changed, 14 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/sound/cs42l42.txt b/Documentation/devicetree/bindings/sound/cs42l42.txt
index 7dfaa2ab906f..5d416fdaf023 100644
--- a/Documentation/devicetree/bindings/sound/cs42l42.txt
+++ b/Documentation/devicetree/bindings/sound/cs42l42.txt
@@ -81,6 +81,13 @@ Optional properties:
< x1 x2 x3 x4 >
Default = < 15 8 4 1>
+ - cirrus,hs-bias-sense-disable: This is boolean property. If present the
+ HSBIAS sense is disabled. Configures HSBIAS output current sense through
+ the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce
+ the potential pop noise during the headset plug out slowly. But on some
+ platforms ESD voltage will affect it causing test to fail, especially
+ with CTIA headset type. For different hardware setups, a designer might
+ want to tweak default behavior.
Example:
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index d7fb6b38fd7c..5087c5b781f8 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -1033,7 +1033,7 @@ static void cs42l42_process_hs_type_detect(struct cs42l42_private *cs42l42)
CS42L42_AUTO_HSBIAS_HIZ_MASK |
CS42L42_TIP_SENSE_EN_MASK |
CS42L42_HSBIAS_SENSE_TRIP_MASK,
- (1 << CS42L42_HSBIAS_SENSE_EN_SHIFT) |
+ (cs42l42->hs_bias_sense_en << CS42L42_HSBIAS_SENSE_EN_SHIFT) |
(1 << CS42L42_AUTO_HSBIAS_HIZ_SHIFT) |
(0 << CS42L42_TIP_SENSE_EN_SHIFT) |
(3 << CS42L42_HSBIAS_SENSE_TRIP_SHIFT));
@@ -1808,6 +1808,11 @@ static int cs42l42_handle_device_data(struct device *dev,
(cs42l42->hs_bias_ramp_rate <<
CS42L42_HSBIAS_RAMP_SHIFT));
+ if (device_property_read_bool(dev, "cirrus,hs-bias-sense-disable"))
+ cs42l42->hs_bias_sense_en = 0;
+ else
+ cs42l42->hs_bias_sense_en = 1;
+
return 0;
}
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index 2e0d3836bd7e..24f7be228d5f 100644
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -787,6 +787,7 @@ struct cs42l42_private {
u8 bias_thresholds[CS42L42_NUM_BIASES];
u8 hs_bias_ramp_rate;
u8 hs_bias_ramp_time;
+ u8 hs_bias_sense_en;
u8 stream_use;
};
--
2.25.1
On Tue, 11 May 2021 15:52:20 +0100, Vitaly Rodionov wrote:
> HSBIAS_SENSE_EN configures HSBIAS output current sense through
> the external 2.21-k resistor. HSBIAS_SENSE is hardware feature to reduce
> the potential pop noise during the headset plug out slowly. But on some
> platforms ESD voltage will affect it causing test to fail, especially
> with CTIA headset type. For different hardware setups, a designer might
> want to tweak default behavior.
Applied to
https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
Thanks!
[1/1] ASoC: cs42l42: make HSBIAS_SENSE_EN optional
commit: c9f2e3c3ddab87d93cde99f6da10dd00c1d1edb9
All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.
You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.
If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.
Please add any relevant lists and maintainers to the CCs when replying
to this mail.
Thanks,
Mark