From: Vinod Koul <vkoul@kernel.org>
To: Bard Liao <yung-chuan.liao@linux.intel.com>
Cc: pierre-louis.bossart@linux.intel.com,
alsa-devel@alsa-project.org, tiwai@suse.de,
gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org,
ranjani.sridharan@linux.intel.com, hui.wang@canonical.com,
broonie@kernel.org, srinivas.kandagatla@linaro.org,
jank@cadence.com, mengdong.lin@intel.com,
slawomir.blauciak@intel.com, sanyog.r.kale@intel.com,
rander.wang@linux.intel.com, bard.liao@intel.com
Subject: Re: [PATCH 03/13] soundwire: intel: reset pm_runtime status during system resume
Date: Mon, 17 Aug 2020 16:49:24 +0530 [thread overview]
Message-ID: <20200817111924.GO2639@vkoul-mobl> (raw)
In-Reply-To: <20200721203723.18305-4-yung-chuan.liao@linux.intel.com>
On 22-07-20, 04:37, Bard Liao wrote:
> From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
>
> The system resume does the entire bus re-initialization and brings it
> to full-power. If the device was pm_runtime suspended, there is no
> need to run the pm_runtime resume sequence after the system runtime.
>
> Follow the documentation from runtime_pm.rst, and conditionally
> disable, set_active and re-enable the device on system resume.
>
> Note that pm_runtime_suspended() is used instead of
> pm_runtime_status_suspended() so that we can deal with the case where
> pm_runtime is disabled.
>
> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
> Signed-off-by: Bard Liao <yung-chuan.liao@linux.intel.com>
> ---
> drivers/soundwire/intel.c | 20 ++++++++++++++++++++
> 1 file changed, 20 insertions(+)
>
> diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
> index ed7163ae5f7a..284e5c9d240a 100644
> --- a/drivers/soundwire/intel.c
> +++ b/drivers/soundwire/intel.c
> @@ -1433,6 +1433,14 @@ static int intel_suspend(struct device *dev)
> return 0;
> }
>
> + if (pm_runtime_suspended(dev)) {
> + dev_dbg(dev,
> + "%s: pm_runtime status: suspended\n",
> + __func__);
first, can we have this in a single line, or better drop it
second why would this be called when device is suspended
> +
> + return 0;
> + }
> +
> ret = sdw_cdns_enable_interrupt(cdns, false);
> if (ret < 0) {
> dev_err(dev, "cannot disable interrupts on suspend\n");
> @@ -1493,6 +1501,18 @@ static int intel_resume(struct device *dev)
> return 0;
> }
>
> + if (pm_runtime_suspended(dev)) {
> + dev_dbg(dev,
> + "%s: pm_runtime status was suspended, forcing active\n",
> + __func__);
this one also could look better in a single line
> +
> + /* follow required sequence from runtime_pm.rst */
> + pm_runtime_disable(dev);
> + pm_runtime_set_active(dev);
> + pm_runtime_mark_last_busy(dev);
> + pm_runtime_enable(dev);
> + }
> +
> ret = intel_init(sdw);
> if (ret) {
> dev_err(dev, "%s failed: %d", __func__, ret);
> --
> 2.17.1
--
~Vinod
next prev parent reply other threads:[~2020-08-17 11:20 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-21 20:37 [PATCH 00/13] soundwire: intel: add power management support Bard Liao
2020-07-21 20:37 ` [PATCH 01/13] soundwire: intel: Add basic " Bard Liao
2020-07-21 20:37 ` [PATCH 02/13] soundwire: intel: add pm_runtime support Bard Liao
2020-07-21 20:37 ` [PATCH 03/13] soundwire: intel: reset pm_runtime status during system resume Bard Liao
2020-08-17 11:19 ` Vinod Koul [this message]
2020-07-21 20:37 ` [PATCH 04/13] soundwire: intel: fix race condition on " Bard Liao
2020-07-21 20:37 ` [PATCH 05/13] soundwire: intel: call helper to reset Slave states on resume Bard Liao
2020-07-21 20:37 ` [PATCH 06/13] soundwire: intel: reinitialize IP+DSP in .prepare(), but only when resuming Bard Liao
2020-07-21 20:37 ` [PATCH 07/13] soundwire: intel: pm_runtime idle scheduling Bard Liao
2020-07-21 20:37 ` [PATCH 08/13] soundwire: intel: add CLK_STOP_TEARDOWN for pm_runtime suspend Bard Liao
2020-07-21 20:37 ` [PATCH 09/13] soundwire: intel: add CLK_STOP_BUS_RESET support Bard Liao
2020-08-17 11:47 ` Vinod Koul
2020-08-17 14:30 ` Pierre-Louis Bossart
2020-08-18 6:27 ` Vinod Koul
2020-07-21 20:37 ` [PATCH 10/13] soundwire: intel: add CLK_STOP_NOT_ALLOWED support Bard Liao
2020-07-21 20:37 ` [PATCH 11/13] soundwire: intel_init: handle power rail dependencies for clock stop mode Bard Liao
2020-07-21 20:37 ` [PATCH 12/13] soundwire: intel: support clock_stop mode without quirks Bard Liao
2020-07-21 20:37 ` [PATCH 13/13] soundwire: intel: refine runtime pm for SDW_INTEL_CLK_STOP_BUS_RESET Bard Liao
2020-08-17 12:08 ` [PATCH 00/13] soundwire: intel: add power management support Vinod Koul
2020-08-17 14:46 ` Pierre-Louis Bossart
2020-08-17 16:10 ` Pierre-Louis Bossart
2020-08-18 6:29 ` Vinod Koul
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