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authorMurali Karicheri <m-karicheri2@ti.com>2015-10-13 23:49:04 +0300
committerSantosh Shilimkar <ssantosh@kernel.org>2015-10-13 23:49:04 +0300
commit045016902bf7abeeb2a86fc9284c30dce228f055 (patch)
tree5d3555a274a3f27b79c46cdd7ac43ea0bca466c9 /drivers/soc/ti
parent96ee19becc3bd7b2cebae5828c3eacfebb50b993 (diff)
downloadlinux-045016902bf7abeeb2a86fc9284c30dce228f055.tar.xz
soc: ti: qmss: make acc queue support optional in the driver
acc channels are available only if accumulator PDSP is loaded and running in the SoC. As this requires firmware and user may not have firmware in the file system, make the accumulator queue support available in qmss driver optional. To use accumulator queus user needs to add firmware to the file system and boot up kernel. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Santosh Shilimkar <ssantosh@kernel.org>
Diffstat (limited to 'drivers/soc/ti')
-rw-r--r--drivers/soc/ti/knav_qmss.h2
-rw-r--r--drivers/soc/ti/knav_qmss_acc.c10
-rw-r--r--drivers/soc/ti/knav_qmss_queue.c20
3 files changed, 25 insertions, 7 deletions
diff --git a/drivers/soc/ti/knav_qmss.h b/drivers/soc/ti/knav_qmss.h
index c31b8d826794..6ff936cacb70 100644
--- a/drivers/soc/ti/knav_qmss.h
+++ b/drivers/soc/ti/knav_qmss.h
@@ -137,6 +137,8 @@ struct knav_pdsp_info {
u32 __iomem *iram;
u32 id;
struct list_head list;
+ bool loaded;
+ bool started;
};
struct knav_qmgr_info {
diff --git a/drivers/soc/ti/knav_qmss_acc.c b/drivers/soc/ti/knav_qmss_acc.c
index ef6f69db0bd0..37c4aa95492d 100644
--- a/drivers/soc/ti/knav_qmss_acc.c
+++ b/drivers/soc/ti/knav_qmss_acc.c
@@ -482,8 +482,8 @@ struct knav_range_ops knav_acc_range_ops = {
* Return 0 on success or error
*/
int knav_init_acc_range(struct knav_device *kdev,
- struct device_node *node,
- struct knav_range_info *range)
+ struct device_node *node,
+ struct knav_range_info *range)
{
struct knav_acc_channel *acc;
struct knav_pdsp_info *pdsp;
@@ -526,6 +526,12 @@ int knav_init_acc_range(struct knav_device *kdev,
return -EINVAL;
}
+ if (!pdsp->started) {
+ dev_err(kdev->dev, "pdsp id %d not started for range %s\n",
+ info->pdsp_id, range->name);
+ return -ENODEV;
+ }
+
info->pdsp = pdsp;
channels = range->num_queues;
if (of_get_property(node, "multi-queue", NULL)) {
diff --git a/drivers/soc/ti/knav_qmss_queue.c b/drivers/soc/ti/knav_qmss_queue.c
index 06d9de826758..f3a0b6a4b54e 100644
--- a/drivers/soc/ti/knav_qmss_queue.c
+++ b/drivers/soc/ti/knav_qmss_queue.c
@@ -1504,6 +1504,8 @@ static int knav_queue_stop_pdsp(struct knav_device *kdev,
dev_err(kdev->dev, "timed out on pdsp %s stop\n", pdsp->name);
return ret;
}
+ pdsp->loaded = false;
+ pdsp->started = false;
return 0;
}
@@ -1592,16 +1594,24 @@ static int knav_queue_start_pdsps(struct knav_device *kdev)
int ret;
knav_queue_stop_pdsps(kdev);
- /* now load them all */
+ /* now load them all. We return success even if pdsp
+ * is not loaded as acc channels are optional on having
+ * firmware availability in the system. We set the loaded
+ * and stated flag and when initialize the acc range, check
+ * it and init the range only if pdsp is started.
+ */
for_each_pdsp(kdev, pdsp) {
ret = knav_queue_load_pdsp(kdev, pdsp);
- if (ret < 0)
- return ret;
+ if (!ret)
+ pdsp->loaded = true;
}
for_each_pdsp(kdev, pdsp) {
- ret = knav_queue_start_pdsp(kdev, pdsp);
- WARN_ON(ret);
+ if (pdsp->loaded) {
+ ret = knav_queue_start_pdsp(kdev, pdsp);
+ if (!ret)
+ pdsp->started = true;
+ }
}
return 0;
}