linux-kernel.vger.kernel.org archive mirror
 help / color / mirror / Atom feed
From: Bard Liao <yung-chuan.liao@linux.intel.com>
To: alsa-devel@alsa-project.org, vkoul@kernel.org
Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org,
	tiwai@suse.de, broonie@kernel.org, gregkh@linuxfoundation.org,
	jank@cadence.com, srinivas.kandagatla@linaro.org,
	rander.wang@linux.intel.com, ranjani.sridharan@linux.intel.com,
	hui.wang@canonical.com, pierre-louis.bossart@linux.intel.com,
	sanyog.r.kale@intel.com, mengdong.lin@intel.com,
	bard.liao@intel.com
Subject: [PATCH v2 07/12] soundwire: intel: add CLK_STOP_TEARDOWN for pm_runtime suspend
Date: Mon, 17 Aug 2020 23:29:18 +0800	[thread overview]
Message-ID: <20200817152923.3259-8-yung-chuan.liao@linux.intel.com> (raw)
In-Reply-To: <20200817152923.3259-1-yung-chuan.liao@linux.intel.com>

From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

Now that we have options, add support for TEARDOWN mode (same
functionality as existing code)

All other modes will be added in follow-up patches.

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      | 82 +++++++++++++++++++++-------------
 drivers/soundwire/intel.h      |  2 +
 drivers/soundwire/intel_init.c |  1 +
 3 files changed, 54 insertions(+), 31 deletions(-)

diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 3f9015dcb693..68c1cdfb7999 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -1548,6 +1548,7 @@ static int intel_suspend_runtime(struct device *dev)
 	struct sdw_cdns *cdns = dev_get_drvdata(dev);
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_bus *bus = &cdns->bus;
+	u32 clock_stop_quirks;
 	int ret;
 
 	if (bus->prop.hw_disabled) {
@@ -1556,21 +1557,31 @@ static int intel_suspend_runtime(struct device *dev)
 		return 0;
 	}
 
-	ret = sdw_cdns_enable_interrupt(cdns, false);
-	if (ret < 0) {
-		dev_err(dev, "cannot disable interrupts on suspend\n");
-		return ret;
-	}
+	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
-	ret = intel_link_power_down(sdw);
-	if (ret) {
-		dev_err(dev, "Link power down failed: %d", ret);
-		return ret;
-	}
+	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
+
+		ret = sdw_cdns_enable_interrupt(cdns, false);
+		if (ret < 0) {
+			dev_err(dev, "cannot disable interrupts on suspend\n");
+			return ret;
+		}
 
-	intel_shim_wake(sdw, false);
+		ret = intel_link_power_down(sdw);
+		if (ret) {
+			dev_err(dev, "Link power down failed: %d", ret);
+			return ret;
+		}
+
+		intel_shim_wake(sdw, false);
+
+	} else {
+		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
+			__func__, clock_stop_quirks);
+		ret = -EINVAL;
+	}
 
-	return 0;
+	return ret;
 }
 
 static int intel_resume(struct device *dev)
@@ -1645,6 +1656,7 @@ static int intel_resume_runtime(struct device *dev)
 	struct sdw_cdns *cdns = dev_get_drvdata(dev);
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_bus *bus = &cdns->bus;
+	u32 clock_stop_quirks;
 	int ret;
 
 	if (bus->prop.hw_disabled) {
@@ -1653,28 +1665,36 @@ static int intel_resume_runtime(struct device *dev)
 		return 0;
 	}
 
-	ret = intel_init(sdw);
-	if (ret) {
-		dev_err(dev, "%s failed: %d", __func__, ret);
-		return ret;
-	}
+	clock_stop_quirks = sdw->link_res->clock_stop_quirks;
 
-	/*
-	 * make sure all Slaves are tagged as UNATTACHED and provide
-	 * reason for reinitialization
-	 */
-	sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
+	if (clock_stop_quirks & SDW_INTEL_CLK_STOP_TEARDOWN) {
+		ret = intel_init(sdw);
+		if (ret) {
+			dev_err(dev, "%s failed: %d", __func__, ret);
+			return ret;
+		}
 
-	ret = sdw_cdns_enable_interrupt(cdns, true);
-	if (ret < 0) {
-		dev_err(dev, "cannot enable interrupts during resume\n");
-		return ret;
-	}
+		/*
+		 * make sure all Slaves are tagged as UNATTACHED and provide
+		 * reason for reinitialization
+		 */
+		sdw_clear_slave_status(bus, SDW_UNATTACH_REQUEST_MASTER_RESET);
 
-	ret = sdw_cdns_exit_reset(cdns);
-	if (ret < 0) {
-		dev_err(dev, "unable to exit bus reset sequence during resume\n");
-		return ret;
+		ret = sdw_cdns_enable_interrupt(cdns, true);
+		if (ret < 0) {
+			dev_err(dev, "cannot enable interrupts during resume\n");
+			return ret;
+		}
+
+		ret = sdw_cdns_exit_reset(cdns);
+		if (ret < 0) {
+			dev_err(dev, "unable to exit bus reset sequence during resume\n");
+			return ret;
+		}
+	} else {
+		dev_err(dev, "%s clock_stop_quirks %x unsupported\n",
+			__func__, clock_stop_quirks);
+		ret = -EINVAL;
 	}
 
 	return ret;
diff --git a/drivers/soundwire/intel.h b/drivers/soundwire/intel.h
index 4ea3d262d249..23daab9da329 100644
--- a/drivers/soundwire/intel.h
+++ b/drivers/soundwire/intel.h
@@ -17,6 +17,7 @@
  * @dev: device implementing hw_params and free callbacks
  * @shim_lock: mutex to handle access to shared SHIM registers
  * @shim_mask: global pointer to check SHIM register initialization
+ * @clock_stop_quirks: mask defining requested behavior on pm_suspend
  * @cdns: Cadence master descriptor
  * @list: used to walk-through all masters exposed by the same controller
  */
@@ -31,6 +32,7 @@ struct sdw_intel_link_res {
 	struct device *dev;
 	struct mutex *shim_lock; /* protect shared registers */
 	u32 *shim_mask;
+	u32 clock_stop_quirks;
 	struct sdw_cdns *cdns;
 	struct list_head list;
 };
diff --git a/drivers/soundwire/intel_init.c b/drivers/soundwire/intel_init.c
index a1f210853545..dd1050743dca 100644
--- a/drivers/soundwire/intel_init.c
+++ b/drivers/soundwire/intel_init.c
@@ -249,6 +249,7 @@ static struct sdw_intel_ctx
 		link->ops = res->ops;
 		link->dev = res->dev;
 
+		link->clock_stop_quirks = res->clock_stop_quirks;
 		link->shim_lock = &ctx->shim_lock;
 		link->shim_mask = &ctx->shim_mask;
 
-- 
2.17.1


  parent reply	other threads:[~2020-08-18  3:23 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-17 15:29 [PATCH v2 00/12] soundwire: intel: add power management support Bard Liao
2020-08-17 15:29 ` [PATCH v2 01/12] soundwire: intel: add pm_runtime support Bard Liao
2020-08-17 15:29 ` [PATCH v2 02/12] soundwire: intel: reset pm_runtime status during system resume Bard Liao
2020-08-17 15:29 ` [PATCH v2 03/12] soundwire: intel: fix race condition on " Bard Liao
2020-08-17 15:29 ` [PATCH v2 04/12] soundwire: intel: call helper to reset Slave states on resume Bard Liao
2020-08-17 15:29 ` [PATCH v2 05/12] soundwire: intel: reinitialize IP+DSP in .prepare(), but only when resuming Bard Liao
2020-08-17 15:29 ` [PATCH v2 06/12] soundwire: intel: pm_runtime idle scheduling Bard Liao
2020-08-17 15:29 ` Bard Liao [this message]
2020-08-17 15:29 ` [PATCH v2 08/12] soundwire: intel: add CLK_STOP_BUS_RESET support Bard Liao
2020-08-17 15:29 ` [PATCH v2 09/12] soundwire: intel: add CLK_STOP_NOT_ALLOWED support Bard Liao
2020-08-17 15:29 ` [PATCH v2 10/12] soundwire: intel_init: handle power rail dependencies for clock stop mode Bard Liao
2020-08-17 15:29 ` [PATCH v2 11/12] soundwire: intel: support clock_stop mode without quirks Bard Liao
2020-08-17 15:29 ` [PATCH v2 12/12] soundwire: intel: refine runtime pm for SDW_INTEL_CLK_STOP_BUS_RESET Bard Liao
2020-08-18  6:31 ` [PATCH v2 00/12] soundwire: intel: add power management support Vinod Koul

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20200817152923.3259-8-yung-chuan.liao@linux.intel.com \
    --to=yung-chuan.liao@linux.intel.com \
    --cc=alsa-devel@alsa-project.org \
    --cc=bard.liao@intel.com \
    --cc=broonie@kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=hui.wang@canonical.com \
    --cc=jank@cadence.com \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mengdong.lin@intel.com \
    --cc=pierre-louis.bossart@linux.intel.com \
    --cc=rander.wang@linux.intel.com \
    --cc=ranjani.sridharan@linux.intel.com \
    --cc=sanyog.r.kale@intel.com \
    --cc=srinivas.kandagatla@linaro.org \
    --cc=tiwai@suse.de \
    --cc=vinod.koul@linaro.org \
    --cc=vkoul@kernel.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line before the message body. 
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).