diff options
| author | Shengjiu Wang <shengjiu.wang@nxp.com> | 2021-02-22 16:40:20 +0800 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2021-03-10 13:07:16 +0000 |
| commit | 907e0cdebc1f36623ca8ce6a6376abb1ad56e93d (patch) | |
| tree | 70578a15ccbec77f617b84b0d8e9e3d5a8c4b8b6 /sound/soc/fsl/fsl_sai.c | |
| parent | 13fba3e873b1f21ed3de6596568ef02d31050b6f (diff) | |
ASoC: fsl_sai: Add pm qos cpu latency support
On SoCs such as i.MX7ULP, cpuidle has some levels which
may disable system/bus clocks, so need to add pm_qos to
prevent cpuidle from entering low level idles and make sure
system/bus clocks are enabled when sai is active.
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Link: https://lore.kernel.org/r/1613983220-5373-1-git-send-email-shengjiu.wang@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/fsl/fsl_sai.c')
| -rw-r--r-- | sound/soc/fsl/fsl_sai.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 5e65b456d3e2..a22679dea578 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -10,6 +10,7 @@ #include <linux/module.h> #include <linux/of_address.h> #include <linux/of_device.h> +#include <linux/pm_qos.h> #include <linux/pm_runtime.h> #include <linux/regmap.h> #include <linux/slab.h> @@ -1177,6 +1178,7 @@ static const struct fsl_sai_soc_data fsl_sai_vf610_data = { .fifo_depth = 32, .reg_offset = 0, .mclk0_is_mclk1 = false, + .flags = 0, }; static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = { @@ -1185,6 +1187,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = { .fifo_depth = 32, .reg_offset = 0, .mclk0_is_mclk1 = true, + .flags = 0, }; static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = { @@ -1193,6 +1196,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = { .fifo_depth = 16, .reg_offset = 8, .mclk0_is_mclk1 = false, + .flags = PMQOS_CPU_LATENCY, }; static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = { @@ -1201,6 +1205,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = { .fifo_depth = 128, .reg_offset = 8, .mclk0_is_mclk1 = false, + .flags = 0, }; static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = { @@ -1209,6 +1214,7 @@ static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = { .fifo_depth = 64, .reg_offset = 0, .mclk0_is_mclk1 = false, + .flags = 0, }; static const struct of_device_id fsl_sai_ids[] = { @@ -1235,6 +1241,9 @@ static int fsl_sai_runtime_suspend(struct device *dev) clk_disable_unprepare(sai->bus_clk); + if (sai->soc_data->flags & PMQOS_CPU_LATENCY) + cpu_latency_qos_remove_request(&sai->pm_qos_req); + regcache_cache_only(sai->regmap, true); return 0; @@ -1264,6 +1273,9 @@ static int fsl_sai_runtime_resume(struct device *dev) goto disable_tx_clk; } + if (sai->soc_data->flags & PMQOS_CPU_LATENCY) + cpu_latency_qos_add_request(&sai->pm_qos_req, 0); + regcache_cache_only(sai->regmap, false); regcache_mark_dirty(sai->regmap); regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR); |