linux-kernel - [PATCH 08/10] ASoC: SOF: Intel: hda: add parameter to control SoundWire clock stop quirks

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Date:   Thu, 12 Mar 2020 14:33:44 -0500
From:   Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
To:     alsa-devel@...a-project.org
Cc:     linux-kernel@...r.kernel.org, tiwai@...e.de, broonie@...nel.org,
        vkoul@...nel.org, gregkh@...uxfoundation.org, jank@...ence.com,
        srinivas.kandagatla@...aro.org, slawomir.blauciak@...el.com,
        Bard liao <yung-chuan.liao@...ux.intel.com>,
        Rander Wang <rander.wang@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Hui Wang <hui.wang@...onical.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        YueHaibing <yuehaibing@...wei.com>,
        Zhu Yingjiang <yingjiang.zhu@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>
Subject: [PATCH 08/10] ASoC: SOF: Intel: hda: add parameter to control SoundWire clock stop quirks

Add module parameter so that the different modes can be quickly tested.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
---
 sound/soc/sof/intel/hda.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/sound/soc/sof/intel/hda.c b/sound/soc/sof/intel/hda.c
index f7e5371789f2..32b02d3b6536 100644
--- a/sound/soc/sof/intel/hda.c
+++ b/sound/soc/sof/intel/hda.c
@@ -40,6 +40,16 @@
 
 #if IS_ENABLED(CONFIG_SND_SOC_SOF_INTEL_SOUNDWIRE)
 
+/*
+ * The default for SoundWire clock stop quirks is to power gate the IP
+ * and do a Bus Reset, this will need to be modified when the DSP
+ * needs to remain in D0i3 so that the Master does not lose context
+ * and enumeration is not required on clock restart
+ */
+static int sdw_clock_stop_quirks = SDW_INTEL_CLK_STOP_BUS_RESET;
+module_param(sdw_clock_stop_quirks, int, 0444);
+MODULE_PARM_DESC(sdw_clock_stop_quirks, "SOF SoundWire clock stop quirks");
+
 static int sdw_params_stream(struct device *dev,
 			     struct sdw_intel_stream_params_data *params_data)
 {
@@ -149,6 +159,7 @@ static int hda_sdw_probe(struct snd_sof_dev *sdev)
 	res.parent = sdev->dev;
 	res.ops = &sdw_callback;
 	res.dev = sdev->dev;
+	res.clock_stop_quirks = sdw_clock_stop_quirks;
 
 	/*
 	 * ops and arg fields are not populated for now,
-- 
2.20.1