From 246dd4287dfbaaddc1511c744893621814618bc8 Mon Sep 17 00:00:00 2001 From: Pierre-Louis Bossart Date: Thu, 12 Aug 2021 18:19:40 -0500 Subject: [PATCH] ASoC: SOF: Intel: make DMI L1 selection more robust MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Exposing the DMI L1 configuration as a kernel Kconfig option was in hindsight a really bad idea. It led to several errors reported by distributions which selected it by mistake. The Kconfig is now replaced with a kernel parameter. Since DMI L1 entry is incompatible with pause on a capture stream, the latter is disabled when the kernel parameter is set. Experimental results show an increased residency in higher C states and a significant decrease of system power consumption for "work from home" usages such as VoIP calls. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Péter Ujfalusi Reviewed-by: Kai Vehmanen Reviewed-by: Ranjani Sridharan Link: https://lore.kernel.org/r/20210812231940.172547-5-pierre-louis.bossart@linux.intel.com Signed-off-by: Mark Brown --- sound/soc/sof/intel/Kconfig | 10 ---------- sound/soc/sof/intel/hda-pcm.c | 17 ++++++++++++++--- 2 files changed, 14 insertions(+), 13 deletions(-) diff --git a/sound/soc/sof/intel/Kconfig b/sound/soc/sof/intel/Kconfig index ef8cf95b0edc..88b6176af021 100644 --- a/sound/soc/sof/intel/Kconfig +++ b/sound/soc/sof/intel/Kconfig @@ -249,16 +249,6 @@ config SND_SOC_SOF_HDA_PROBES Say Y if you want to enable probes. If unsure, select "N". -config SND_SOC_SOF_HDA_ALWAYS_ENABLE_DMI_L1 - bool "SOF Intel-HDA enable DMI Link L1" - help - This option enables DMI L1 for both playback and capture - and disables known workarounds for specific HDAudio platforms. - Only use to look into power optimizations on platforms not - affected by DMI L1 issues. This option is not recommended. - Say Y if you want to enable DMI Link L1. - If unsure, select "N". - endif ## SND_SOC_SOF_HDA_COMMON config SND_SOC_SOF_HDA_LINK_BASELINE diff --git a/sound/soc/sof/intel/hda-pcm.c b/sound/soc/sof/intel/hda-pcm.c index 59220fa1def1..cc8ddef37f37 100644 --- a/sound/soc/sof/intel/hda-pcm.c +++ b/sound/soc/sof/intel/hda-pcm.c @@ -15,6 +15,7 @@ * Hardware interface for generic Intel audio DSP HDA IP */ +#include #include #include #include "../sof-audio.h" @@ -27,6 +28,10 @@ #define SDnFMT_BITS(x) ((x) << 4) #define SDnFMT_CHAN(x) ((x) << 0) +static bool hda_always_enable_dmi_l1; +module_param_named(always_enable_dmi_l1, hda_always_enable_dmi_l1, bool, 0444); +MODULE_PARM_DESC(always_enable_dmi_l1, "SOF HDA always enable DMI l1"); + u32 hda_dsp_get_mult_div(struct snd_sof_dev *sdev, int rate) { switch (rate) { @@ -216,6 +221,7 @@ int hda_dsp_pcm_open(struct snd_sof_dev *sdev, struct snd_pcm_substream *substream) { struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); + struct snd_pcm_runtime *runtime = substream->runtime; struct snd_soc_component *scomp = sdev->component; struct hdac_ext_stream *dsp_stream; struct snd_sof_pcm *spcm; @@ -228,9 +234,14 @@ int hda_dsp_pcm_open(struct snd_sof_dev *sdev, return -EINVAL; } - /* All playback and D0i3 compatible streams are DMI L1 capable */ - if (IS_ENABLED(CONFIG_SND_SOC_SOF_HDA_ALWAYS_ENABLE_DMI_L1) || - direction == SNDRV_PCM_STREAM_PLAYBACK || + /* + * All playback streams are DMI L1 capable, capture streams need + * pause push/release to be disabled + */ + if (hda_always_enable_dmi_l1 && direction == SNDRV_PCM_STREAM_CAPTURE) + runtime->hw.info &= ~SNDRV_PCM_INFO_PAUSE; + + if (hda_always_enable_dmi_l1 || spcm->stream[substream->stream].d0i3_compatible) flags |= SOF_HDA_STREAM_DMI_L1_COMPATIBLE; -- 2.11.0