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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>,
	MyungJoo Ham <myungjoo.ham@samsung.com>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Chanwoo Choi <cw00.choi@samsung.com>
Cc: Saravana Kannan <saravanak@google.com>,
	Rajendra Nayak <rnayak@codeaurora.org>,
	Jordan Crouse <jcrouse@codeaurora.org>,
	vincent.guittot@linaro.org, bjorn.andersson@linaro.org,
	amit.kucheria@linaro.org, seansw@qti.qualcomm.com,
	daidavid1@codeaurora.org, evgreen@chromium.org,
	sibis@codeaurora.org, kernel-team@android.com,
	linux-pm@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: [PATCH v2 06/11] OPP: Add helper function for bandwidth OPP tables
Date: Thu, 13 Jun 2019 21:17:28 -0700
Message-ID: <20190614041733.120807-7-saravanak@google.com> (raw)
In-Reply-To: <20190614041733.120807-1-saravanak@google.com>

The frequency OPP tables have helper functions to search for entries in the
table based on frequency and get the frequency values for a given (or
suspend) OPP entry.

Add similar helper functions for bandwidth OPP tables to search for entries
in the table based on peak bandwidth and to get the peak and average
bandwidth for a given (or suspend) OPP entry.

Signed-off-by: Saravana Kannan <saravanak@google.com>
---
 drivers/opp/core.c     | 51 ++++++++++++++++++++++++++++++++++++++++++
 include/linux/pm_opp.h | 19 ++++++++++++++++
 2 files changed, 70 insertions(+)

diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index 4f7870bffbf8..c9914afd508a 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -130,6 +130,29 @@ unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_get_freq);
 
+/**
+ * dev_pm_opp_get_bw() - Gets the bandwidth corresponding to an available opp
+ * @opp:	opp for which frequency has to be returned for
+ * @avg_bw:	Pointer where the corresponding average bandwidth is stored.
+ *		Can be NULL.
+ *
+ * Return: Peak bandwidth in KBps corresponding to the opp, else
+ * return 0
+ */
+unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, unsigned long *avg_bw)
+{
+	if (IS_ERR_OR_NULL(opp) || !opp->available) {
+		pr_err("%s: Invalid parameters\n", __func__);
+		return 0;
+	}
+
+	if (avg_bw)
+		*avg_bw = opp->avg_bw;
+
+	return opp->rate;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_bw);
+
 /**
  * dev_pm_opp_get_level() - Gets the level corresponding to an available opp
  * @opp:	opp for which level value has to be returned for
@@ -302,6 +325,34 @@ unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
 }
 EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_freq);
 
+/**
+ * dev_pm_opp_get_suspend_opp_bw() - Get peak bandwidth of suspend opp in KBps
+ * @dev:	device for which we do this operation
+ * @avg_bw:	Pointer where the corresponding average bandwidth is stored.
+ *		Can be NULL.
+ *
+ * Return: This function returns the peak bandwidth of the OPP marked as
+ * suspend_opp if one is available, else returns 0;
+ */
+unsigned long dev_pm_opp_get_suspend_opp_bw(struct device *dev,
+					    unsigned long *avg_bw)
+{
+	struct opp_table *opp_table;
+	unsigned long peak_bw = 0;
+
+	opp_table = _find_opp_table(dev);
+	if (IS_ERR(opp_table))
+		return 0;
+
+	if (opp_table->suspend_opp && opp_table->suspend_opp->available)
+		peak_bw = dev_pm_opp_get_bw(opp_table->suspend_opp, avg_bw);
+
+	dev_pm_opp_put_opp_table(opp_table);
+
+	return peak_bw;
+}
+EXPORT_SYMBOL_GPL(dev_pm_opp_get_suspend_opp_bw);
+
 int _get_opp_count(struct opp_table *opp_table)
 {
 	struct dev_pm_opp *opp;
diff --git a/include/linux/pm_opp.h b/include/linux/pm_opp.h
index bc5c68bdfc8d..2e122af26b8e 100644
--- a/include/linux/pm_opp.h
+++ b/include/linux/pm_opp.h
@@ -85,6 +85,7 @@ void dev_pm_opp_put_opp_table(struct opp_table *opp_table);
 unsigned long dev_pm_opp_get_voltage(struct dev_pm_opp *opp);
 
 unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp);
+unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp, unsigned long *avg_bw);
 
 unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp);
 
@@ -95,6 +96,8 @@ unsigned long dev_pm_opp_get_max_clock_latency(struct device *dev);
 unsigned long dev_pm_opp_get_max_volt_latency(struct device *dev);
 unsigned long dev_pm_opp_get_max_transition_latency(struct device *dev);
 unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev);
+unsigned long dev_pm_opp_get_suspend_opp_bw(struct device *dev,
+					    unsigned long *avg_bw);
 
 struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
 					      unsigned long freq,
@@ -164,6 +167,11 @@ static inline unsigned long dev_pm_opp_get_freq(struct dev_pm_opp *opp)
 {
 	return 0;
 }
+static inline unsigned long dev_pm_opp_get_bw(struct dev_pm_opp *opp,
+					      unsigned long *avg_bw)
+{
+	return 0;
+}
 
 static inline unsigned int dev_pm_opp_get_level(struct dev_pm_opp *opp)
 {
@@ -200,6 +208,12 @@ static inline unsigned long dev_pm_opp_get_suspend_opp_freq(struct device *dev)
 	return 0;
 }
 
+static inline unsigned long dev_pm_opp_get_suspend_opp_bw(struct device *dev,
+							  unsigned long *avg_bw)
+{
+	return 0;
+}
+
 static inline struct dev_pm_opp *dev_pm_opp_find_freq_exact(struct device *dev,
 					unsigned long freq, bool available)
 {
@@ -343,6 +357,11 @@ static inline void dev_pm_opp_cpumask_remove_table(const struct cpumask *cpumask
 
 #endif		/* CONFIG_PM_OPP */
 
+#define dev_pm_opp_find_peak_bw_exact	dev_pm_opp_find_freq_exact
+#define dev_pm_opp_find_peak_bw_floor	dev_pm_opp_find_freq_floor
+#define dev_pm_opp_find_peak_bw_ceil_by_volt dev_pm_opp_find_freq_ceil_by_volt
+#define dev_pm_opp_find_peak_bw_ceil	dev_pm_opp_find_freq_ceil
+
 #if defined(CONFIG_PM_OPP) && defined(CONFIG_OF)
 int dev_pm_opp_of_add_table(struct device *dev);
 int dev_pm_opp_of_add_table_indexed(struct device *dev, int index);
-- 
2.22.0.rc2.383.gf4fbbf30c2-goog


  parent reply index

Thread overview: 16+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-14  4:17 [PATCH v2 00/11] Introduce Bandwidth OPPs & interconnect devfreq driver Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 01/11] OPP: Allow required-opps even if the device doesn't have power-domains Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 02/11] OPP: Add function to look up required OPP's for a given OPP Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 03/11] PM / devfreq: Add required OPPs support to passive governor Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 04/11] dt-bindings: opp: Introduce opp-peak-KBps and opp-avg-KBps bindings Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 05/11] OPP: Add support for bandwidth OPP tables Saravana Kannan
2019-06-14  4:17 ` Saravana Kannan [this message]
2019-06-14  4:17 ` [PATCH v2 07/11] OPP: Add API to find an OPP table from its DT node Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 08/11] dt-bindings: interconnect: Add interconnect-opp-table property Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 09/11] interconnect: Add OPP table support for interconnects Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 10/11] OPP: Allow copying OPPs tables between devices Saravana Kannan
2019-06-14  4:17 ` [PATCH v2 11/11] interconnect: Add devfreq support Saravana Kannan
2019-06-17 15:43   ` Georgi Djakov
2019-06-17 21:18     ` Saravana Kannan
2019-07-16 18:12       ` Sibi Sankar
2019-07-16 19:17         ` Saravana Kannan

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