linux-kernel - [PATCH 3/9] ALSA: hda/cs35l56: Call cs_dsp_power

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Message-ID: <20230731165726.7940-4-rf@opensource.cirrus.com>
Date:   Mon, 31 Jul 2023 17:57:20 +0100
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <tiwai@...e.com>
CC:     <perex@...ex.cz>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH 3/9] ALSA: hda/cs35l56: Call cs_dsp_power_down() before reloading firmware

When firmware is reloaded after a system resume cs_dsp_power_down() should
be called before calling cs_dsp_power_up().

The fw_patched flag should also be cleared and only set again if the
firmware download succeeded.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
---
 sound/pci/hda/cs35l56_hda.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/pci/hda/cs35l56_hda.c b/sound/pci/hda/cs35l56_hda.c
index fda716e0db09..b6b8cb21da75 100644
--- a/sound/pci/hda/cs35l56_hda.c
+++ b/sound/pci/hda/cs35l56_hda.c
@@ -527,6 +527,12 @@ static int cs35l56_hda_fw_load(struct cs35l56_hda *cs35l56)
 	char *wmfw_filename = NULL;
 	int ret = 0;
 
+	/* Prepare for a new DSP power-up */
+	if (cs35l56->base.fw_patched)
+		cs_dsp_power_down(&cs35l56->cs_dsp);
+
+	cs35l56->base.fw_patched = false;
+
 	cs35l56_hda_request_firmware_files(cs35l56, &wmfw_firmware, &wmfw_filename,
 					   &coeff_firmware, &coeff_filename);
 
-- 
2.30.2