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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Pardha Saradhi K <pardha.saradhi.kesapragada@intel.com>,
        Sanyog Kale <sanyog.r.kale@intel.com>,
        Guneshwor Singh <guneshwor.o.singh@intel.com>,
        Vinod Koul <vinod.koul@intel.com>,
        Mark Brown <broonie@kernel.org>,
        Sasha Levin <alexander.levin@microsoft.com>
Subject: [PATCH 4.14 027/138] ASoC: Intel: Skylake: Disable clock gating during firmware and library download
Date:   Wed, 11 Apr 2018 00:23:37 +0200
Message-Id: <20180410212905.288150316@linuxfoundation.org>
In-Reply-To: <20180410212902.121524696@linuxfoundation.org>
References: <20180410212902.121524696@linuxfoundation.org>
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4.14-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Pardha Saradhi K <pardha.saradhi.kesapragada@intel.com>


[ Upstream commit d5cc0a1fcbb5ddbef9fdd4c4a978da3254ddbf37 ]

During firmware and library download, sometimes it is observed that
firmware and library download is timed-out resulting into probe failure.

This patch disables dynamic clock gating while firmware and library
download.

Signed-off-by: Pardha Saradhi K <pardha.saradhi.kesapragada@intel.com>
Signed-off-by: Sanyog Kale <sanyog.r.kale@intel.com>
Signed-off-by: Guneshwor Singh <guneshwor.o.singh@intel.com>
Acked-By: Vinod Koul <vinod.koul@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/soc/intel/skylake/skl-messages.c |    4 ++++
 sound/soc/intel/skylake/skl-pcm.c      |    4 ++++
 2 files changed, 8 insertions(+)

--- a/sound/soc/intel/skylake/skl-messages.c
+++ b/sound/soc/intel/skylake/skl-messages.c
@@ -404,7 +404,11 @@ int skl_resume_dsp(struct skl *skl)
 	if (skl->skl_sst->is_first_boot == true)
 		return 0;
 
+	/* disable dynamic clock gating during fw and lib download */
+	ctx->enable_miscbdcge(ctx->dev, false);
+
 	ret = skl_dsp_wake(ctx->dsp);
+	ctx->enable_miscbdcge(ctx->dev, true);
 	if (ret < 0)
 		return ret;
 
--- a/sound/soc/intel/skylake/skl-pcm.c
+++ b/sound/soc/intel/skylake/skl-pcm.c
@@ -1332,7 +1332,11 @@ static int skl_platform_soc_probe(struct
 			return -EIO;
 		}
 
+		/* disable dynamic clock gating during fw and lib download */
+		skl->skl_sst->enable_miscbdcge(platform->dev, false);
+
 		ret = ops->init_fw(platform->dev, skl->skl_sst);
+		skl->skl_sst->enable_miscbdcge(platform->dev, true);
 		if (ret < 0) {
 			dev_err(platform->dev, "Failed to boot first fw: %d\n", ret);
 			return ret;