linux-kernel - [PATCH] ASoC: SOF: amd: fix for firmware reload failure after playback

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Message-ID: <20230927071412.2416250-1-Vijendar.Mukunda@amd.com>
Date:   Wed, 27 Sep 2023 12:44:10 +0530
From:   Vijendar Mukunda <Vijendar.Mukunda@....com>
To:     <broonie@...nel.org>
CC:     <alsa-devel@...a-project.org>, <Basavaraj.Hiregoudar@....com>,
        <Sunil-kumar.Dommati@....com>,
        Vijendar Mukunda <Vijendar.Mukunda@....com>,
        coolstar <coolstarorganization@...il.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Peter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
        Daniel Baluta <daniel.baluta@....com>,
        Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Rander Wang <rander.wang@...el.com>,
        V sujith kumar Reddy <Vsujithkumar.Reddy@....com>,
        Venkata Prasad Potturu <venkataprasad.potturu@....com>,
        Ajit Kumar Pandey <AjitKumar.Pandey@....com>,
        "moderated list:SOUND - SOUND OPEN FIRMWARE (SOF) DRIVERS" 
        <sound-open-firmware@...a-project.org>,
        open list <linux-kernel@...r.kernel.org>
Subject: [PATCH] ASoC: SOF: amd: fix for firmware reload failure after playback

Setting ACP ACLK as clock source when ACP enters D0 state causing
firmware load failure as mentioned in below scenario.

- Load snd_sof_amd_rembrandt
- Play or Record audio
- Stop audio
- Unload snd_sof_amd_rembrandt
- Reload snd_sof_amd_rembrandt

If acp_clkmux_sel register field is set, then clock source will be
set to ACP ACLK when ACP enters D0 state.

During stream stop, if there is no active stream is running then
acp firmware will set the ACP ACLK value to zero.

When driver is reloaded and clock source is selected as ACP ACLK,
as ACP ACLK is programmed to zero, firmware loading will fail.

For RMB platform, remove the clock mux selection field so that
ACP will use internal clock source when ACP enters D0 state.

Fixes: 41cb85bc4b52 ("ASoC: SOF: amd: Add support for Rembrandt plaform.")
Reported-by: coolstar <coolstarorganization@...il.com>
Closes: https://github.com/thesofproject/sof/issues/8137
Signed-off-by: Vijendar Mukunda <Vijendar.Mukunda@....com>
---
 sound/soc/sof/amd/pci-rmb.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/sound/soc/sof/amd/pci-rmb.c b/sound/soc/sof/amd/pci-rmb.c
index 72e211b5f7a4..2f288545c426 100644
--- a/sound/soc/sof/amd/pci-rmb.c
+++ b/sound/soc/sof/amd/pci-rmb.c
@@ -35,7 +35,6 @@ static const struct sof_amd_acp_desc rembrandt_chip_info = {
 	.dsp_intr_base	= ACP6X_DSP_SW_INTR_BASE,
 	.sram_pte_offset = ACP6X_SRAM_PTE_OFFSET,
 	.hw_semaphore_offset = ACP6X_AXI2DAGB_SEM_0,
-	.acp_clkmux_sel = ACP6X_CLKMUX_SEL,
 	.fusion_dsp_offset = ACP6X_DSP_FUSION_RUNSTALL,
 	.probe_reg_offset = ACP6X_FUTURE_REG_ACLK_0,
 };
-- 
2.34.1