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asoc: sdm845: update and affine qos value

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Fix qos value to 300 micro seconds to prevent core
from going into low power mode when low latency
session is active. Also pin this qos to core 1
& core 2 where audio and glink threads are
running to let other cores to go to low power
modes if possible.

Change-Id: I46d356c384fd8d02a9a3b336a113200171bf25a0
Signed-off-by: Haynes Mathew George <hgeorge@codeaurora.org>
Signed-off-by: Dhananjay Kumar <dhakumar@codeaurora.org>
Signed-off-by: Aniket Kumar Lata <alata@codeaurora.org>
This commit is contained in:
Haynes Mathew George 2017-10-18 14:40:24 -07:00 • committed by Gerrit - the friendly Code Review server
commit c3f9814e4f
1 changed files with 29 additions and 16 deletions
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45
asoc/sdm845.c
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@ -21,6 +21,7 @@
#include <linux/module.h>
#include <linux/input.h>
#include <linux/of_device.h>
#include <linux/pm_qos.h>
#include <sound/core.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
@ -72,6 +73,7 @@
#define TDM_CHANNEL_MAX 8
#define MSM_HIFI_ON 1
#define MSM_LL_QOS_VALUE 300 /* time in us to ensure LPM doesn't go in C3/C4 */
enum {
SLIM_RX_0 = 0,
@ -2614,21 +2616,6 @@ static int msm_hifi_put(struct snd_kcontrol *kcontrol,
return 0;
}
static s32 msm_qos_value(struct snd_pcm_runtime *runtime)
{
s32 usecs;
if (!runtime->rate)
return -EINVAL;
/* take 75% of period time as the deadline */
usecs = (750000 / runtime->rate) * runtime->period_size;
usecs += ((750000 % runtime->rate) * runtime->period_size) /
runtime->rate;
return usecs;
}
static int msm_qos_ctl_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
@ -2668,7 +2655,7 @@ static int msm_qos_ctl_put(struct snd_kcontrol *kcontrol,
pr_err("%s: runtime is null\n", __func__);
return -EINVAL;
}
usecs = msm_qos_value(substream->runtime);
usecs = MSM_LL_QOS_VALUE;
if (usecs >= 0)
pm_qos_add_request(&substream->latency_pm_qos_req,
PM_QOS_CPU_DMA_LATENCY, usecs);
@ -4616,6 +4603,30 @@ static struct snd_soc_ops sdm845_tdm_be_ops = {
.shutdown = sdm845_tdm_snd_shutdown
};
static int msm_fe_qos_prepare(struct snd_pcm_substream *substream)
{
cpumask_t mask;
if (pm_qos_request_active(&substream->latency_pm_qos_req))
pm_qos_remove_request(&substream->latency_pm_qos_req);
cpumask_clear(&mask);
cpumask_set_cpu(1, &mask); /* affine to core 1 */
cpumask_set_cpu(2, &mask); /* affine to core 2 */
cpumask_copy(&substream->latency_pm_qos_req.cpus_affine, &mask);
substream->latency_pm_qos_req.type = PM_QOS_REQ_AFFINE_CORES;
pm_qos_add_request(&substream->latency_pm_qos_req,
PM_QOS_CPU_DMA_LATENCY,
MSM_LL_QOS_VALUE);
return 0;
}
static struct snd_soc_ops msm_fe_qos_ops = {
.prepare = msm_fe_qos_prepare,
};
static int msm_mi2s_snd_startup(struct snd_pcm_substream *substream)
{
int ret = 0;
@ -4986,6 +4997,7 @@ static struct snd_soc_dai_link msm_common_dai_links[] = {
/* this dainlink has playback support */
.ignore_pmdown_time = 1,
.id = MSM_FRONTEND_DAI_MULTIMEDIA5,
.ops = &msm_fe_qos_ops,
},
{
.name = "Listen 1 Audio Service",
@ -5053,6 +5065,7 @@ static struct snd_soc_dai_link msm_common_dai_links[] = {
.ignore_pmdown_time = 1,
/* this dainlink has playback support */
.id = MSM_FRONTEND_DAI_MULTIMEDIA8,
.ops = &msm_fe_qos_ops,
},
/* HDMI Hostless */
{