linux-kernel - [PATCH AUTOSEL 6.2 18/45] ASoC: SOF: Intel: hda-ctrl: re-add sleep after entering and exiting reset

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Message-Id: <20230322195639.1995821-18-sashal@kernel.org>
Date:   Wed, 22 Mar 2023 15:56:12 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Rander Wang <rander.wang@...el.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, lgirdwood@...il.com,
        yung-chuan.liao@...ux.intel.com, daniel.baluta@....com,
        perex@...ex.cz, tiwai@...e.com,
        sound-open-firmware@...a-project.org, alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 6.2 18/45] ASoC: SOF: Intel: hda-ctrl: re-add sleep after entering and exiting reset

From: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>

[ Upstream commit 8bac40b8ed17ab1be9133e9620f65fae80262b7e ]

This reverts commit a09d82ce0a867 ("ASoC: SOF: Intel: hda-ctrl: remove
useless sleep")

It was a mistake to remove those delays, in light of comments in the
HDaudio spec captured in snd_hdac_bus_reset_link() that the codec
needs time for its initialization and PLL lock.

Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>
Reviewed-by: Rander Wang <rander.wang@...el.com>
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>
Link: https://lore.kernel.org/r/20230307095412.3416-1-peter.ujfalusi@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/sof/intel/hda-ctrl.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/sof/intel/hda-ctrl.c b/sound/soc/sof/intel/hda-ctrl.c
index 3aea36c077c9d..f3bdeba284122 100644
--- a/sound/soc/sof/intel/hda-ctrl.c
+++ b/sound/soc/sof/intel/hda-ctrl.c
@@ -196,12 +196,15 @@ int hda_dsp_ctrl_init_chip(struct snd_sof_dev *sdev)
 		goto err;
 	}
 
+	usleep_range(500, 1000);
+
 	/* exit HDA controller reset */
 	ret = hda_dsp_ctrl_link_reset(sdev, false);
 	if (ret < 0) {
 		dev_err(sdev->dev, "error: failed to exit HDA controller reset\n");
 		goto err;
 	}
+	usleep_range(1000, 1200);
 
 	hda_codec_detect_mask(sdev);
 
-- 
2.39.2