linux-kernel - Re: [PATCH v1 1/1] soundwire: qcom: disable stop clock on 1.3.0 and below

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Date: Wed, 17 Apr 2024 12:42:58 +0100
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
To: Anton Bambura <jenneron@...tmarketos.org>, Andy Gross
 <agross@...nel.org>, Bjorn Andersson <andersson@...nel.org>,
 Konrad Dybcio <konrad.dybcio@...aro.org>, Vinod Koul <vkoul@...nel.org>,
 Bard Liao <yung-chuan.liao@...ux.intel.com>,
 Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
 Sanyog Kale <sanyog.r.kale@...el.com>
Cc: linux-arm-msm@...r.kernel.org, alsa-devel@...a-project.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 1/1] soundwire: qcom: disable stop clock on 1.3.0 and
 below



On 13/04/2024 07:42, Anton Bambura wrote:
> This patch returns back the behavior of disabling stop clock on soundwire
> 1.3.0 and below which seems to have been altered by accident which
> results in broken audio on sdm845 + wcd9340. For example, on AYN Odin and
> Lenovo Yoga C630 devices.
> 
> Fixes: 4830bfa2c812 ("soundwire: qcom: set clk stop need reset flag at runtime")
> Signed-off-by: Anton Bambura <jenneron@...tmarketos.org>
> ---
>   drivers/soundwire/qcom.c | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/drivers/soundwire/qcom.c b/drivers/soundwire/qcom.c
> index a1e2d6c98186..bc03484a28e8 100644
> --- a/drivers/soundwire/qcom.c
> +++ b/drivers/soundwire/qcom.c
> @@ -628,6 +628,9 @@ static int qcom_swrm_enumerate(struct sdw_bus *bus)
>   			}
>   		}
>   
> +		if (ctrl->version <= SWRM_VERSION_1_3_0)
> +			ctrl->clock_stop_not_supported = true;
> +

This is not the right fix, this can be determined from codec 
clk_stop_mode1 flag.

can you try this patch:

----------------------------->cut<-----------------------------
From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Date: Wed, 17 Apr 2024 12:38:49 +0100
Subject: [PATCH] ASoC: codecs: wsa881x: set clk_stop_mode1 flag

WSA881x codecs do not retain the state while clock is stopped, so mark
this with clk_stop_mode1 flag.

Fixes: a0aab9e1404a ("ASoC: codecs: add wsa881x amplifier support")
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
---
  sound/soc/codecs/wsa881x.c | 1 +
  1 file changed, 1 insertion(+)

diff --git a/sound/soc/codecs/wsa881x.c b/sound/soc/codecs/wsa881x.c
index 3c025dabaf7a..1253695bebd8 100644
--- a/sound/soc/codecs/wsa881x.c
+++ b/sound/soc/codecs/wsa881x.c
@@ -1155,6 +1155,7 @@ static int wsa881x_probe(struct sdw_slave *pdev,
  	pdev->prop.sink_ports = GENMASK(WSA881X_MAX_SWR_PORTS, 0);
  	pdev->prop.sink_dpn_prop = wsa_sink_dpn_prop;
  	pdev->prop.scp_int1_mask = SDW_SCP_INT1_BUS_CLASH | SDW_SCP_INT1_PARITY;
+	pdev->prop.clk_stop_mode1 = true;
  	gpiod_direction_output(wsa881x->sd_n, !wsa881x->sd_n_val);

  	wsa881x->regmap = devm_regmap_init_sdw(pdev, &wsa881x_regmap_config);
-- 
2.21.0
----------------------------->cut<-----------------------------


thanks,
Srini

>   		if (!found) {
>   			qcom_swrm_set_slave_dev_num(bus, NULL, i);
>   			sdw_slave_add(bus, &id, NULL);