From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org,
vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com,
srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com,
Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
Sanyog Kale <sanyog.r.kale@intel.com>
Subject: [RFC PATCH 33/40] soundwire: intel: Add basic power management support
Date: Thu, 25 Jul 2019 18:40:25 -0500 [thread overview]
Message-ID: <20190725234032.21152-34-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20190725234032.21152-1-pierre-louis.bossart@linux.intel.com>
Implement suspend/resume capabilities (not runtime_pm for now)
Credits: this patch is based on an earlier internal contribution by
Vinod Koul, Sanyog Kale, Shreyas Nc and Hardik Shah.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/intel.c | 102 ++++++++++++++++++++++++++++++++++++++
1 file changed, 102 insertions(+)
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 215dc81cdf73..1477c35f616f 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -12,6 +12,7 @@
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
#include <sound/soc.h>
#include <linux/soundwire/sdw_registers.h>
#include <linux/soundwire/sdw.h>
@@ -278,6 +279,35 @@ static void intel_debugfs_exit(struct sdw_intel *sdw)
/*
* shim ops
*/
+static int intel_link_power_down(struct sdw_intel *sdw)
+{
+ int link_control, spa_mask, cpa_mask, ret;
+ unsigned int link_id = sdw->instance;
+ void __iomem *shim = sdw->res->shim;
+ u16 ioctl;
+
+ /* Glue logic */
+ ioctl = intel_readw(shim, SDW_SHIM_IOCTL(link_id));
+ ioctl |= SDW_SHIM_IOCTL_BKE;
+ ioctl |= SDW_SHIM_IOCTL_COE;
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+
+ ioctl &= ~(SDW_SHIM_IOCTL_MIF);
+ intel_writew(shim, SDW_SHIM_IOCTL(link_id), ioctl);
+
+ /* Link power down sequence */
+ link_control = intel_readl(shim, SDW_SHIM_LCTL);
+ spa_mask = ~(SDW_SHIM_LCTL_SPA << link_id);
+ cpa_mask = (SDW_SHIM_LCTL_CPA << link_id);
+ link_control &= spa_mask;
+
+ ret = intel_clear_bit(shim, SDW_SHIM_LCTL, link_control, cpa_mask);
+ if (ret < 0)
+ return ret;
+
+ sdw->cdns.link_up = false;
+ return 0;
+}
static int intel_link_power_up(struct sdw_intel *sdw)
{
@@ -300,6 +330,29 @@ static int intel_link_power_up(struct sdw_intel *sdw)
return 0;
}
+static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+ void __iomem *shim = sdw->res->shim;
+ unsigned int link_id = sdw->instance;
+ u16 wake_en, wake_sts;
+
+ if (wake_enable) {
+ /* Enable the wakeup */
+ intel_writew(shim, SDW_SHIM_WAKEEN,
+ (SDW_SHIM_WAKEEN_ENABLE << link_id));
+ } else {
+ /* Disable the wake up interrupt */
+ wake_en = intel_readw(shim, SDW_SHIM_WAKEEN);
+ wake_en &= ~(SDW_SHIM_WAKEEN_ENABLE << link_id);
+ intel_writew(shim, SDW_SHIM_WAKEEN, wake_en);
+
+ /* Clear wake status */
+ wake_sts = intel_readw(shim, SDW_SHIM_WAKESTS);
+ wake_sts |= (SDW_SHIM_WAKEEN_ENABLE << link_id);
+ intel_writew(shim, SDW_SHIM_WAKESTS_STATUS, wake_sts);
+ }
+}
+
static int intel_shim_init(struct sdw_intel *sdw)
{
void __iomem *shim = sdw->res->shim;
@@ -1095,11 +1148,60 @@ static int intel_remove(struct platform_device *pdev)
return 0;
}
+/*
+ * PM calls
+ */
+
+#ifdef CONFIG_PM
+
+static int intel_suspend(struct device *dev)
+{
+ struct sdw_intel *sdw;
+ int ret;
+
+ sdw = dev_get_drvdata(dev);
+
+ ret = intel_link_power_down(sdw);
+ if (ret) {
+ dev_err(dev, "Link power down failed: %d", ret);
+ return ret;
+ }
+
+ intel_shim_wake(sdw, false);
+
+ return 0;
+}
+
+static int intel_resume(struct device *dev)
+{
+ struct sdw_intel *sdw;
+ int ret;
+
+ sdw = dev_get_drvdata(dev);
+
+ ret = intel_init(sdw);
+ if (ret) {
+ dev_err(dev, "%s failed: %d", __func__, ret);
+ return ret;
+ }
+
+ sdw_cdns_enable_interrupt(&sdw->cdns);
+
+ return ret;
+}
+
+#endif
+
+static const struct dev_pm_ops intel_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(intel_suspend, intel_resume)
+};
+
static struct platform_driver sdw_intel_drv = {
.probe = intel_probe,
.remove = intel_remove,
.driver = {
.name = "int-sdw",
+ .pm = &intel_pm,
},
};
--
2.20.1
next prev parent reply other threads:[~2019-07-25 23:42 UTC|newest]
Thread overview: 183+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-25 23:39 [RFC PATCH 00/40] soundwire: updates for 5.4 Pierre-Louis Bossart
2019-07-25 23:39 ` [RFC PATCH 01/40] soundwire: add debugfs support Pierre-Louis Bossart
2019-07-25 22:15 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 13:43 ` Pierre-Louis Bossart
2019-07-26 9:22 ` Cezary Rojewski
2019-07-26 13:57 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-26 14:04 ` Greg KH
2019-07-26 15:29 ` Pierre-Louis Bossart
2019-07-25 23:39 ` [RFC PATCH 02/40] soundwire: cadence_master: add debugfs register dump Pierre-Louis Bossart
2019-07-26 14:09 ` Greg KH
2019-07-26 15:32 ` Pierre-Louis Bossart
2019-08-05 7:55 ` Sanyog Kale
2019-08-05 15:20 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:39 ` [RFC PATCH 03/40] soundwire: cadence_master: align debugfs to 8 digits Pierre-Louis Bossart
2019-07-26 9:38 ` Cezary Rojewski
2019-07-26 13:58 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-02 11:50 ` Vinod Koul
2019-07-25 23:39 ` [RFC PATCH 04/40] soundwire: intel: add debugfs register dump Pierre-Louis Bossart
2019-07-26 9:35 ` Cezary Rojewski
2019-07-26 14:00 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-26 14:11 ` Greg KH
2019-07-26 14:06 ` Greg KH
2019-07-26 14:09 ` Greg KH
2019-07-26 15:34 ` Pierre-Louis Bossart
2019-07-25 23:39 ` [RFC PATCH 05/40] soundwire: intel: move interrupt enable after interrupt handler registration Pierre-Louis Bossart
2019-08-02 11:53 ` Vinod Koul
2019-08-02 15:08 ` Pierre-Louis Bossart
2019-07-25 23:39 ` [RFC PATCH 06/40] soundwire: intel: prevent possible dereference in hw_params Pierre-Louis Bossart
2019-07-26 9:45 ` Cezary Rojewski
2019-07-26 14:02 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-02 11:55 ` Vinod Koul
2019-08-02 15:16 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-02 15:57 ` Vinod Koul
2019-08-02 16:52 ` Pierre-Louis Bossart
2019-08-02 17:37 ` Vinod Koul
2019-07-25 23:39 ` [RFC PATCH 07/40] soundwire: intel: fix channel number reported by hardware Pierre-Louis Bossart
2019-08-02 11:57 ` Vinod Koul
2019-08-02 15:18 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 08/40] soundwire: intel: remove BIOS work-arounds Pierre-Louis Bossart
2019-08-02 11:58 ` Vinod Koul
2019-07-25 23:40 ` [RFC PATCH 09/40] soundwire: cadence_master: fix usage of CONFIG_UPDATE Pierre-Louis Bossart
2019-07-25 22:23 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 14:05 ` Pierre-Louis Bossart
2019-07-26 2:11 ` Bard liao
2019-07-26 13:33 ` Pierre-Louis Bossart
2019-07-26 9:53 ` Cezary Rojewski
2019-07-26 9:54 ` Cezary Rojewski
2019-08-02 12:03 ` Vinod Koul
2019-08-02 15:18 ` Pierre-Louis Bossart
2019-08-05 8:51 ` Sanyog Kale
2019-07-25 23:40 ` [RFC PATCH 10/40] soundwire: cadence_master: remove useless wrapper Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 11/40] soundwire: cadence_master: simplify bus clash interrupt clear Pierre-Louis Bossart
2019-08-02 12:07 ` Vinod Koul
2019-07-25 23:40 ` [RFC PATCH 12/40] soundwire: cadence_master: revisit interrupt settings Pierre-Louis Bossart
2019-08-02 12:10 ` Vinod Koul
2019-08-02 15:23 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 13/40] soundwire: cadence_master: fix register definition for SLAVE_STATE Pierre-Louis Bossart
2019-08-02 12:12 ` Vinod Koul
2019-07-25 23:40 ` [RFC PATCH 14/40] soundwire: cadence_master: fix definitions for INTSTAT0/1 Pierre-Louis Bossart
2019-08-02 12:13 ` Vinod Koul
2019-07-25 23:40 ` [RFC PATCH 15/40] soundwire: cadence_master: handle multiple status reports per Slave Pierre-Louis Bossart
2019-07-25 22:31 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 14:09 ` Pierre-Louis Bossart
2019-08-02 12:20 ` Vinod Koul
2019-08-02 15:29 ` Pierre-Louis Bossart
2019-08-02 16:01 ` Vinod Koul
2019-08-02 16:41 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 16/40] soundwire: cadence_master: improve startup sequence with link hw_reset Pierre-Louis Bossart
2019-07-26 7:22 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 14:11 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 17/40] soundwire: bus: use runtime_pm_get_sync/pm when enabled Pierre-Louis Bossart
2019-07-26 7:39 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 7:47 ` Jan Kotas
2019-07-26 8:22 ` Guennadi Liakhovetski
2019-07-26 8:33 ` Jan Kotas
2019-07-26 8:42 ` Guennadi Liakhovetski
2019-07-26 18:08 ` Pierre-Louis Bossart
2019-07-26 18:25 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 19:11 ` Andy Shevchenko
2019-07-26 19:08 ` Andy Shevchenko
2019-07-29 22:07 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-30 11:21 ` Andy Shevchenko
2019-07-30 12:57 ` Pierre-Louis Bossart
2019-07-30 15:58 ` Andy Shevchenko
2019-07-30 15:59 ` Andy Shevchenko
2019-08-02 16:58 ` Vinod Koul
2019-08-02 17:20 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 18/40] soundwire: bus: split handling of Device0 events Pierre-Louis Bossart
2019-08-02 16:59 ` Vinod Koul
2019-07-25 23:40 ` [RFC PATCH 19/40] soundwire: bus: improve dynamic debug comments for enumeration Pierre-Louis Bossart
2019-08-02 17:00 ` Vinod Koul
2019-08-02 17:20 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 20/40] soundwire: prototypes for suspend/resume Pierre-Louis Bossart
2019-07-26 10:04 ` Cezary Rojewski
2019-07-26 14:15 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-02 17:03 ` Vinod Koul
2019-08-02 17:21 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 21/40] soundwire: export helpers to find row and column values Pierre-Louis Bossart
2019-07-26 14:43 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 15:26 ` Pierre-Louis Bossart
2019-08-02 17:04 ` Vinod Koul
2019-08-05 9:39 ` Sanyog Kale
2019-08-05 15:27 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 22/40] soundwire: include mod_devicetable.h to avoid compiling warnings Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 23/40] soundwire: stream: fix disable sequence Pierre-Louis Bossart
2019-07-26 10:14 ` Cezary Rojewski
2019-07-26 14:17 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-26 14:51 ` Guennadi Liakhovetski
2019-07-26 15:05 ` Pierre-Louis Bossart
2019-08-05 9:56 ` Sanyog Kale
2019-08-05 15:33 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-05 16:32 ` Sanyog Kale
2019-08-05 19:12 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 24/40] soundwire: cadence_master: use BIOS defaults for frame shape Pierre-Louis Bossart
2019-07-26 10:20 ` Cezary Rojewski
2019-07-26 14:22 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-02 17:10 ` Vinod Koul
2019-08-02 17:24 ` Pierre-Louis Bossart
2019-08-05 10:01 ` Sanyog Kale
2019-07-25 23:40 ` [RFC PATCH 25/40] soundwire: intel: use BIOS information to set clock dividers Pierre-Louis Bossart
2019-08-02 17:17 ` Vinod Koul
2019-08-02 17:29 ` Pierre-Louis Bossart
2019-08-05 10:28 ` Sanyog Kale
2019-08-05 15:40 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 26/40] soundwire: cadence_master: fix divider setting in clock register Pierre-Louis Bossart
2019-07-26 5:19 ` [alsa-devel] " Bard liao
2019-07-26 5:56 ` rander.wang
2019-07-26 14:24 ` Pierre-Louis Bossart
2019-08-02 17:19 ` Vinod Koul
2019-08-02 17:30 ` Pierre-Louis Bossart
2019-08-05 10:40 ` Sanyog Kale
2019-08-05 15:41 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 27/40] soundwire: Add Intel resource management algorithm Pierre-Louis Bossart
2019-07-26 11:07 ` Cezary Rojewski
2019-07-26 14:41 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-26 15:43 ` Guennadi Liakhovetski
2019-07-26 17:55 ` Pierre-Louis Bossart
2019-08-05 16:54 ` Sanyog Kale
2019-08-05 19:08 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 28/40] soundwire: intel: handle disabled links Pierre-Louis Bossart
2019-08-05 16:57 ` Sanyog Kale
2019-08-05 19:18 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 29/40] soundwire: intel_init: add kernel module parameter to filter out links Pierre-Louis Bossart
2019-07-26 10:30 ` Cezary Rojewski
2019-07-26 14:43 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 30/40] soundwire: cadence_master: add kernel parameter to override interrupt mask Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 31/40] soundwire: intel: move shutdown() callback and don't export symbol Pierre-Louis Bossart
2019-07-26 10:38 ` Cezary Rojewski
2019-07-26 14:46 ` [alsa-devel] " Pierre-Louis Bossart
2019-08-02 17:28 ` Vinod Koul
2019-08-02 17:42 ` Pierre-Louis Bossart
2019-08-14 19:31 ` Pierre-Louis Bossart
2019-08-23 7:34 ` Vinod Koul
2019-08-23 15:57 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 32/40] soundwire: intel: add helper for initialization Pierre-Louis Bossart
2019-07-26 10:42 ` Cezary Rojewski
2019-07-26 14:55 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` Pierre-Louis Bossart [this message]
2019-07-26 10:50 ` [RFC PATCH 33/40] soundwire: intel: Add basic power management support Cezary Rojewski
2019-07-26 14:57 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 34/40] soundwire: intel: ignore disabled links for suspend/resume Pierre-Louis Bossart
2019-08-02 17:30 ` Vinod Koul
2019-08-02 17:44 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 35/40] soundwire: intel: export helper to exit reset Pierre-Louis Bossart
2019-07-26 15:52 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 17:22 ` Pierre-Louis Bossart
2019-08-02 17:31 ` Vinod Koul
2019-08-02 17:44 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 36/40] soundwire: intel: disable interrupts on suspend Pierre-Louis Bossart
2019-07-26 15:55 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 17:26 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 37/40] soundwire: cadence_master: add hw_reset capability in debugfs Pierre-Louis Bossart
2019-07-26 14:07 ` Greg KH
2019-07-26 15:01 ` [alsa-devel] " Pierre-Louis Bossart
2019-07-26 15:57 ` Guennadi Liakhovetski
2019-07-26 17:31 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 38/40] soundwire: cadence_master: make clock stop exit configurable on init Pierre-Louis Bossart
2019-07-26 16:02 ` [alsa-devel] " Guennadi Liakhovetski
2019-07-26 17:35 ` Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 39/40] soundwire: intel: add pm_runtime support Pierre-Louis Bossart
2019-07-25 23:40 ` [RFC PATCH 40/40] soundwire: intel: add delay on restart for enumeration Pierre-Louis Bossart
2019-07-26 11:14 ` [RFC PATCH 00/40] soundwire: updates for 5.4 Cezary Rojewski
2019-07-26 15:23 ` [alsa-devel] " Pierre-Louis Bossart
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