From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
tiwai@suse.de, gregkh@linuxfoundation.org,
linux-kernel@vger.kernel.org,
Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
vkoul@kernel.org, broonie@kernel.org,
srinivas.kandagatla@linaro.org, jank@cadence.com,
slawomir.blauciak@intel.com,
Sanyog Kale <sanyog.r.kale@intel.com>,
Bard liao <yung-chuan.liao@linux.intel.com>,
Rander Wang <rander.wang@linux.intel.com>
Subject: [alsa-devel] [PATCH v3 05/22] soundwire: intel: add helpers for link power down and shim wake
Date: Thu, 14 Nov 2019 12:16:45 -0600 [thread overview]
Message-ID: <20191114181702.22254-6-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191114181702.22254-1-pierre-louis.bossart@linux.intel.com>
These routines are required for power management
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/intel.c | 53 +++++++++++++++++++++++++++++++++++++++
1 file changed, 53 insertions(+)
diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c
index 23c5c3f9d30d..00fa5c3a6c1f 100644
--- a/drivers/soundwire/intel.c
+++ b/drivers/soundwire/intel.c
@@ -362,6 +362,59 @@ static int intel_shim_init(struct sdw_intel *sdw)
return ret;
}
+static void intel_shim_wake(struct sdw_intel *sdw, bool wake_enable)
+{
+ void __iomem *shim = sdw->link_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_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->link_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;
+}
+
/*
* PDI routines
*/
--
2.20.1
_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
next prev parent reply other threads:[~2019-11-14 18:22 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-14 18:16 [alsa-devel] [PATCH v3 00/22] soundwire: code hardening and suspend-resume support Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 01/22] soundwire: intel/cadence: fix timeouts in MSI mode Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 02/22] soundwire: bus: fix race condition with probe_complete signaling Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 03/22] soundwire: bus: add PM/no-PM versions of read/write functions Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 04/22] soundwire: bus: write Slave Device Number without runtime_pm Pierre-Louis Bossart
2019-11-14 18:16 ` Pierre-Louis Bossart [this message]
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 06/22] soundwire: intel: Add basic power management support Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 07/22] soundwire: intel: add pm_runtime support Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 08/22] soundwire: intel: reset pm_runtime status during system resume Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 09/22] soundwire: bus: add helper to reset Slave status to UNATTACHED Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 10/22] soundwire: intel: call helper to reset Slave states on resume Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 11/22] soundwire: bus: check first if Slaves become UNATTACHED Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 12/22] soundwire: bus: fix race condition with enumeration_complete signaling Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 13/22] soundwire: bus: fix race condition with initialization_complete signaling Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 14/22] soundwire: bus: fix race condition by tracking UNATTACHED transition Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 15/22] soundwire: intel: disable pm_runtime when removing a master Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 16/22] soundwire: bus: disable pm_runtime in sdw_slave_delete Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 17/22] soundwire: stream: remove redundant pr_err traces Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 18/22] soundwire: stream: update state machine and add state checks Pierre-Louis Bossart
2019-11-14 18:16 ` [alsa-devel] [PATCH v3 19/22] soundwire: stream: only prepare stream when it is configured Pierre-Louis Bossart
2019-11-14 18:17 ` [alsa-devel] [PATCH v3 20/22] soundwire: stream: do not update parameters during DISABLED-PREPARED transition Pierre-Louis Bossart
2019-11-14 18:17 ` [alsa-devel] [PATCH v3 21/22] soundwire: intel: reinitialize IP+DSP in .prepare(), but only when resuming Pierre-Louis Bossart
2019-11-14 18:17 ` [alsa-devel] [PATCH v3 22/22] soundwire: intel: pm_runtime idle scheduling Pierre-Louis Bossart
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=20191114181702.22254-6-pierre-louis.bossart@linux.intel.com \
--to=pierre-louis.bossart@linux.intel.com \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=gregkh@linuxfoundation.org \
--cc=jank@cadence.com \
--cc=linux-kernel@vger.kernel.org \
--cc=rander.wang@linux.intel.com \
--cc=ranjani.sridharan@linux.intel.com \
--cc=sanyog.r.kale@intel.com \
--cc=slawomir.blauciak@intel.com \
--cc=srinivas.kandagatla@linaro.org \
--cc=tiwai@suse.de \
--cc=vkoul@kernel.org \
--cc=yung-chuan.liao@linux.intel.com \
/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).