From: Saravana Kannan <saravanak@google.com>
To: Georgi Djakov <georgi.djakov@linaro.org>,
Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Viresh Kumar <vireshk@kernel.org>, Nishanth Menon <nm@ti.com>,
Stephen Boyd <sboyd@kernel.org>,
"Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Saravana Kannan <saravanak@google.com>,
vincent.guittot@linaro.org, seansw@qti.qualcomm.com,
daidavid1@codeaurora.org, Rajendra Nayak <rnayak@codeaurora.org>,
sibis@codeaurora.org, bjorn.andersson@linaro.org,
evgreen@chromium.org, kernel-team@android.com,
linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: [PATCH v3 6/6] interconnect: Add OPP table support for interconnects
Date: Tue, 2 Jul 2019 18:10:20 -0700 [thread overview]
Message-ID: <20190703011020.151615-7-saravanak@google.com> (raw)
In-Reply-To: <20190703011020.151615-1-saravanak@google.com>
Interconnect paths can have different performance points. Now that OPP
framework supports bandwidth OPP tables, add OPP table support for
interconnects.
Devices can use the interconnect-opp-table DT property to specify OPP
tables for interconnect paths. And the driver can obtain the OPP table for
an interconnect path by calling icc_get_opp_table().
Signed-off-by: Saravana Kannan <saravanak@google.com>
---
drivers/interconnect/core.c | 27 ++++++++++++++++++++++++++-
include/linux/interconnect.h | 7 +++++++
2 files changed, 33 insertions(+), 1 deletion(-)
diff --git a/drivers/interconnect/core.c b/drivers/interconnect/core.c
index 871eb4bc4efc..881bac80bc1e 100644
--- a/drivers/interconnect/core.c
+++ b/drivers/interconnect/core.c
@@ -47,6 +47,7 @@ struct icc_req {
*/
struct icc_path {
size_t num_nodes;
+ struct opp_table *opp_table;
struct icc_req reqs[];
};
@@ -313,7 +314,7 @@ struct icc_path *of_icc_get(struct device *dev, const char *name)
{
struct icc_path *path = ERR_PTR(-EPROBE_DEFER);
struct icc_node *src_node, *dst_node;
- struct device_node *np = NULL;
+ struct device_node *np = NULL, *opp_node;
struct of_phandle_args src_args, dst_args;
int idx = 0;
int ret;
@@ -381,10 +382,34 @@ struct icc_path *of_icc_get(struct device *dev, const char *name)
dev_err(dev, "%s: invalid path=%ld\n", __func__, PTR_ERR(path));
mutex_unlock(&icc_lock);
+ opp_node = of_parse_phandle(np, "interconnect-opp-table", idx);
+ if (opp_node) {
+ path->opp_table = dev_pm_opp_of_find_table_from_node(opp_node);
+ of_node_put(opp_node);
+ }
+
+
return path;
}
EXPORT_SYMBOL_GPL(of_icc_get);
+/**
+ * icc_get_opp_table() - Get the OPP table that corresponds to a path
+ * @path: reference to the path returned by icc_get()
+ *
+ * This function will return the OPP table that corresponds to a path handle.
+ * If the interconnect API is disabled, NULL is returned and the consumer
+ * drivers will still build. Drivers are free to handle this specifically, but
+ * they don't have to.
+ *
+ * Return: opp_table pointer on success. NULL is returned when the API is
+ * disabled or the OPP table is missing.
+ */
+struct opp_table *icc_get_opp_table(struct icc_path *path)
+{
+ return path->opp_table;
+}
+
/**
* icc_set_bw() - set bandwidth constraints on an interconnect path
* @path: reference to the path returned by icc_get()
diff --git a/include/linux/interconnect.h b/include/linux/interconnect.h
index dc25864755ba..0c0bc55f0e89 100644
--- a/include/linux/interconnect.h
+++ b/include/linux/interconnect.h
@@ -9,6 +9,7 @@
#include <linux/mutex.h>
#include <linux/types.h>
+#include <linux/pm_opp.h>
/* macros for converting to icc units */
#define Bps_to_icc(x) ((x) / 1000)
@@ -28,6 +29,7 @@ struct device;
struct icc_path *icc_get(struct device *dev, const int src_id,
const int dst_id);
struct icc_path *of_icc_get(struct device *dev, const char *name);
+struct opp_table *icc_get_opp_table(struct icc_path *path);
void icc_put(struct icc_path *path);
int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);
@@ -49,6 +51,11 @@ static inline void icc_put(struct icc_path *path)
{
}
+static inline struct opp_table *icc_get_opp_table(struct icc_path *path)
+{
+ return NULL;
+}
+
static inline int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw)
{
return 0;
--
2.22.0.410.gd8fdbe21b5-goog
next prev parent reply other threads:[~2019-07-03 1:10 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-03 1:10 [PATCH v3 0/6] Introduce Bandwidth OPPs for interconnect paths Saravana Kannan
2019-07-03 1:10 ` [PATCH v3 1/6] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings Saravana Kannan
2019-07-16 17:25 ` Sibi Sankar
2019-07-16 18:58 ` Saravana Kannan
2019-07-22 23:35 ` Rob Herring
2019-07-22 23:40 ` Saravana Kannan
2019-07-23 14:26 ` Rob Herring
2019-07-24 0:18 ` Saravana Kannan
2019-07-17 7:54 ` Viresh Kumar
2019-07-17 20:29 ` Saravana Kannan
2019-07-18 4:35 ` Viresh Kumar
2019-07-18 17:26 ` Saravana Kannan
2019-07-26 16:24 ` Georgi Djakov
2019-07-26 19:08 ` Saravana Kannan
2019-07-03 1:10 ` [PATCH v3 2/6] OPP: Add support for bandwidth OPP tables Saravana Kannan
2019-07-16 17:33 ` Sibi Sankar
2019-07-16 19:10 ` Saravana Kannan
2019-07-30 10:57 ` Amit Kucheria
2019-07-30 23:20 ` Saravana Kannan
2019-07-03 1:10 ` [PATCH v3 3/6] OPP: Add helper function " Saravana Kannan
2019-07-03 1:10 ` [PATCH v3 4/6] OPP: Add API to find an OPP table from its DT node Saravana Kannan
2019-07-03 1:10 ` [PATCH v3 5/6] dt-bindings: interconnect: Add interconnect-opp-table property Saravana Kannan
2019-07-22 23:39 ` Rob Herring
2019-07-22 23:43 ` Saravana Kannan
2019-07-23 2:21 ` Viresh Kumar
2019-07-03 1:10 ` Saravana Kannan [this message]
2019-07-03 6:45 ` [PATCH v3 6/6] interconnect: Add OPP table support for interconnects Vincent Guittot
2019-07-03 21:33 ` Saravana Kannan
2019-07-04 7:12 ` Vincent Guittot
2019-07-07 21:48 ` Saravana Kannan
2019-07-09 7:25 ` Vincent Guittot
2019-07-09 19:02 ` Saravana Kannan
2019-07-15 8:16 ` Vincent Guittot
2019-07-16 0:55 ` Saravana Kannan
2019-07-24 7:16 ` Vincent Guittot
2019-07-26 16:25 ` Georgi Djakov
2019-07-26 19:08 ` Saravana Kannan
2019-07-03 6:36 ` [PATCH v3 0/6] Introduce Bandwidth OPPs for interconnect paths Viresh Kumar
2019-07-03 20:35 ` Saravana Kannan
2019-07-17 10:32 ` Viresh Kumar
2019-07-17 20:34 ` Saravana Kannan
2019-07-18 5:37 ` Viresh Kumar
2019-07-19 4:12 ` Saravana Kannan
2019-07-29 9:24 ` Viresh Kumar
2019-07-29 20:12 ` Saravana Kannan
2019-07-30 3:01 ` Viresh Kumar
2019-08-03 7:36 ` Saravana Kannan
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