54 lines
1.7 KiB
Diff
54 lines
1.7 KiB
Diff
From 548c2ff9fc75746e3a0a57abb14ca7eaab3bc32f Mon Sep 17 00:00:00 2001
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From: Ramesh Babu <ramesh.babu@intel.com>
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Date: Mon, 6 Jun 2016 13:13:15 +0530
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Subject: [PATCH 130/550] ALSA: hda: ext: add spib to stream context.
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Platforms like skylake support SPIB (software position index in
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Buffer) capability, through which application pointer can be
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programmed in DMA. This helps DMA stop rendering stale data.
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This patch saves spib values in stream context which can be
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restored during resume from S3.
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Change-Id: I2992242087ee0732b6fc571b5e65eb59aa1fa251
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Signed-off-by: Ramesh Babu <ramesh.babu@intel.com>
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Signed-off-by: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
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Signed-off-by: Mallikarjun, chippalkatti <mallikarjunx.chippalkatti@intel.com>
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Reviewed-on:
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Reviewed-by: audio_build <audio_build@intel.com>
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Reviewed-by: Sm, Bhadur A <bhadur.a.sm@intel.com>
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Tested-by: Sm, Bhadur A <bhadur.a.sm@intel.com>
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---
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include/sound/hdaudio_ext.h | 1 +
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sound/hda/ext/hdac_ext_stream.c | 2 ++
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2 files changed, 3 insertions(+)
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diff --git a/include/sound/hdaudio_ext.h b/include/sound/hdaudio_ext.h
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index 2d93a039a286..62181677f009 100644
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--- a/include/sound/hdaudio_ext.h
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+++ b/include/sound/hdaudio_ext.h
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@@ -67,6 +67,7 @@ struct hdac_ext_stream {
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u32 dpib;
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u32 lpib;
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+ u32 spib;
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bool decoupled:1;
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bool link_locked:1;
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bool link_prepared;
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diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c
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index 1b2a1c996422..0ede36f51e2e 100644
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--- a/sound/hda/ext/hdac_ext_stream.c
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+++ b/sound/hda/ext/hdac_ext_stream.c
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@@ -450,6 +450,8 @@ int snd_hdac_ext_stream_set_spib(struct hdac_bus *bus,
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}
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writel(value, stream->spib_addr);
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+ /* save the value in stream context */
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+ stream->spib = value;
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return 0;
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}
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--
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2.19.1
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