From:   Sasha Levin <sashal@kernel.org>
To:     linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
        =?UTF-8?q?P=C3=A9ter=20Ujfalusi?= <peter.ujfalusi@linux.intel.com>,
        Bard Liao <yung-chuan.liao@linux.intel.com>,
        Kai Vehmanen <kai.vehmanen@linux.intel.com>,
        Mark Brown <broonie@kernel.org>,
        Sasha Levin <sashal@kernel.org>, cezary.rojewski@intel.com,
        liam.r.girdwood@linux.intel.com, perex@perex.cz, tiwai@suse.com,
        brent.lu@intel.com, akihiko.odaki@gmail.com,
        ye.xingchen@zte.com.cn, alsa-devel@alsa-project.org
Subject: [PATCH AUTOSEL 6.1 07/38] ASoC: Intel: sof_ssp_amp: always set dpcm_capture for amplifiers
Date:   Thu,  9 Feb 2023 06:14:26 -0500
Message-Id: <20230209111459.1891941-7-sashal@kernel.org>
In-Reply-To: <20230209111459.1891941-1-sashal@kernel.org>
References: <20230209111459.1891941-1-sashal@kernel.org>
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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

[ Upstream commit b3c00316a2f847791bae395ea6dd91aa7a221471 ]

The amplifier may provide hardware support for I/V feedback, or
alternatively the firmware may generate an echo reference attached to
the SSP and dailink used for the amplifier.

To avoid any issues with invalid/NULL substreams in the latter case,
always unconditionally set dpcm_capture.

Link: https://github.com/thesofproject/linux/issues/4083
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20230119163459.2235843-5-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 sound/soc/intel/boards/sof_ssp_amp.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/sound/soc/intel/boards/sof_ssp_amp.c b/sound/soc/intel/boards/sof_ssp_amp.c
index 94d25aeb6e7ce..7b74f122e3400 100644
--- a/sound/soc/intel/boards/sof_ssp_amp.c
+++ b/sound/soc/intel/boards/sof_ssp_amp.c
@@ -258,13 +258,12 @@ static struct snd_soc_dai_link *sof_card_dai_links_create(struct device *dev,
 		sof_rt1308_dai_link(&links[id]);
 	} else if (sof_ssp_amp_quirk & SOF_CS35L41_SPEAKER_AMP_PRESENT) {
 		cs35l41_set_dai_link(&links[id]);
-
-		/* feedback from amplifier */
-		links[id].dpcm_capture = 1;
 	}
 	links[id].platforms = platform_component;
 	links[id].num_platforms = ARRAY_SIZE(platform_component);
 	links[id].dpcm_playback = 1;
+	/* feedback from amplifier or firmware-generated echo reference */
+	links[id].dpcm_capture = 1;
 	links[id].no_pcm = 1;
 	links[id].cpus = &cpus[id];
 	links[id].num_cpus = 1;
-- 
2.39.0