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 5/6] soundwire: cadence_master: handle multiple status reports per Slave
Date: Fri, 10 Jan 2020 15:57:30 -0600 [thread overview]
Message-ID: <20200110215731.30747-6-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20200110215731.30747-1-pierre-louis.bossart@linux.intel.com>
When a Slave reports multiple status in the sticky bits, find the
latest configuration from the mirror of the PING frame status and
update the status directly.
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
drivers/soundwire/cadence_master.c | 35 +++++++++++++++++++++++++-----
1 file changed, 29 insertions(+), 6 deletions(-)
diff --git a/drivers/soundwire/cadence_master.c b/drivers/soundwire/cadence_master.c
index 19b4862e8cce..b0de7d752bdb 100644
--- a/drivers/soundwire/cadence_master.c
+++ b/drivers/soundwire/cadence_master.c
@@ -676,13 +676,36 @@ static int cdns_update_slave_status(struct sdw_cdns *cdns,
/* first check if Slave reported multiple status */
if (set_status > 1) {
+ u32 val;
+
dev_warn_ratelimited(cdns->dev,
- "Slave reported multiple Status: %d\n",
- mask);
- /*
- * TODO: we need to reread the status here by
- * issuing a PING cmd
- */
+ "Slave %d reported multiple Status: %d\n",
+ i, mask);
+
+ /* check latest status extracted from PING commands */
+ val = cdns_readl(cdns, CDNS_MCP_SLAVE_STAT);
+ val >>= (i * 2);
+
+ switch (val & 0x3) {
+ case 0:
+ status[i] = SDW_SLAVE_UNATTACHED;
+ break;
+ case 1:
+ status[i] = SDW_SLAVE_ATTACHED;
+ break;
+ case 2:
+ status[i] = SDW_SLAVE_ALERT;
+ break;
+ case 3:
+ default:
+ status[i] = SDW_SLAVE_RESERVED;
+ break;
+ }
+
+ dev_warn_ratelimited(cdns->dev,
+ "Slave %d status updated to %d\n",
+ i, status[i]);
+
}
}
--
2.20.1
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next prev parent reply other threads:[~2020-01-10 22:02 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-10 21:57 [alsa-devel] [PATCH 0/6] soundwire: cadence: better logs and error handling Pierre-Louis Bossart
2020-01-10 21:57 ` [alsa-devel] [PATCH 1/6] soundwire: cadence_master: filter out bad interrupts Pierre-Louis Bossart
2020-01-10 21:57 ` [alsa-devel] [PATCH 2/6] soundwire: cadence_master: clear interrupt status before enabling interrupt Pierre-Louis Bossart
2020-01-10 21:57 ` [alsa-devel] [PATCH 3/6] soundwire: cadence_master: log more useful information during timeouts Pierre-Louis Bossart
2020-01-10 21:57 ` [alsa-devel] [PATCH 4/6] soundwire: cadence_master: remove config update for interrupt setting Pierre-Louis Bossart
2020-01-10 21:57 ` Pierre-Louis Bossart [this message]
2020-01-10 21:57 ` [alsa-devel] [PATCH 6/6] soundwire: bus: check first if Slaves become UNATTACHED Pierre-Louis Bossart
2020-01-14 6:24 ` [alsa-devel] [PATCH 0/6] soundwire: cadence: better logs and error handling Vinod Koul
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