56 lines
1.9 KiB
Diff
56 lines
1.9 KiB
Diff
From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
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From: Mohit Sinha <mohit.sinha@intel.com>
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Date: Thu, 16 Nov 2017 23:01:21 +0530
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Subject: [PATCH] ASoC: Intel: Skylake: Add delay during DSP core start
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1msec delay is required in power-up sequence of DSP core.
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Power-up sequence for DSP core is as follows:
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1) power up core
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2) unreset core
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3) unstall core
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4) send IPC
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~1msec wait is required between unstall core and before sending IPC
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to ensure proper propagation of signals.
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Change-Id: Ie7c4b47d4b4ce6f869178a5fd9940f6af84b13d2
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Signed-off-by: Mohit Sinha <mohit.sinha@intel.com>
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Reviewed-on:
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Reviewed-by: audio_build
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Reviewed-by: B, Jayachandran <jayachandran.b@intel.com>
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Reviewed-by: Prusty, Subhransu S <subhransu.s.prusty@intel.com>
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Reviewed-by: Pawse, GuruprasadX <guruprasadx.pawse@intel.com>
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Reviewed-by: Tewani, Pradeep D <pradeep.d.tewani@intel.com>
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Reviewed-by: Kp, Jeeja <jeeja.kp@intel.com>
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Reviewed-by: Kale, Sanyog R <sanyog.r.kale@intel.com>
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Tested-by: Sm, Bhadur A <bhadur.a.sm@intel.com>
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---
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sound/soc/intel/skylake/skl-sst-dsp.c | 4 ++++
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1 file changed, 4 insertions(+)
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diff --git a/sound/soc/intel/skylake/skl-sst-dsp.c b/sound/soc/intel/skylake/skl-sst-dsp.c
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index 4b16e0002cd4..b34f7b73e24e 100644
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--- a/sound/soc/intel/skylake/skl-sst-dsp.c
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+++ b/sound/soc/intel/skylake/skl-sst-dsp.c
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@@ -17,6 +17,7 @@
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*/
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#include <sound/pcm.h>
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+#include <linux/delay.h>
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#include "../common/sst-dsp.h"
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#include "../common/sst-ipc.h"
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#include "../common/sst-dsp-priv.h"
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@@ -206,6 +207,9 @@ int skl_dsp_start_core(struct sst_dsp *ctx, unsigned int core_mask)
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if (ret < 0)
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return ret;
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+ /* delay to ensure proper signal propagation after unreset/unstall */
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+ usleep_range(1000, 1500);
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+
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if (!is_skl_dsp_core_enable(ctx, core_mask)) {
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skl_dsp_reset_core(ctx, core_mask);
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dev_err(ctx->dev, "DSP start core failed: core_mask %x\n",
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--
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https://clearlinux.org
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