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Diffstat (limited to 'drivers/opp/core.c')
-rw-r--r--drivers/opp/core.c168
1 files changed, 82 insertions, 86 deletions
diff --git a/drivers/opp/core.c b/drivers/opp/core.c
index aeb216f7e978..e08375ed50aa 100644
--- a/drivers/opp/core.c
+++ b/drivers/opp/core.c
@@ -1054,48 +1054,22 @@ static int _set_opp_bw(const struct opp_table *opp_table,
return 0;
}
-static int _set_performance_state(struct device *dev, struct device *pd_dev,
- struct dev_pm_opp *opp, int i)
-{
- unsigned int pstate = 0;
- int ret;
-
- if (!pd_dev)
- return 0;
-
- if (likely(opp)) {
- pstate = opp->required_opps[i]->level;
- if (pstate == OPP_LEVEL_UNSET)
- return 0;
- }
-
- ret = dev_pm_domain_set_performance_state(pd_dev, pstate);
- if (ret) {
- dev_err(dev, "Failed to set performance state of %s: %d (%d)\n",
- dev_name(pd_dev), pstate, ret);
- }
-
- return ret;
-}
-
-static int _opp_set_required_opps_generic(struct device *dev,
- struct opp_table *opp_table, struct dev_pm_opp *opp, bool scaling_down)
-{
- dev_err(dev, "setting required-opps isn't supported for non-genpd devices\n");
- return -ENOENT;
-}
-
-static int _opp_set_required_opps_genpd(struct device *dev,
- struct opp_table *opp_table, struct dev_pm_opp *opp, bool scaling_down)
+/* This is only called for PM domain for now */
+static int _set_required_opps(struct device *dev, struct opp_table *opp_table,
+ struct dev_pm_opp *opp, bool up)
{
- struct device **genpd_virt_devs = opp_table->genpd_virt_devs;
+ struct device **devs = opp_table->required_devs;
int index, target, delta, ret;
- if (!genpd_virt_devs)
+ if (!devs)
return 0;
+ /* required-opps not fully initialized yet */
+ if (lazy_linking_pending(opp_table))
+ return -EBUSY;
+
/* Scaling up? Set required OPPs in normal order, else reverse */
- if (!scaling_down) {
+ if (up) {
index = 0;
target = opp_table->required_opp_count;
delta = 1;
@@ -1106,9 +1080,11 @@ static int _opp_set_required_opps_genpd(struct device *dev,
}
while (index != target) {
- ret = _set_performance_state(dev, genpd_virt_devs[index], opp, index);
- if (ret)
- return ret;
+ if (devs[index]) {
+ ret = dev_pm_opp_set_opp(devs[index], opp->required_opps[index]);
+ if (ret)
+ return ret;
+ }
index += delta;
}
@@ -1116,34 +1092,6 @@ static int _opp_set_required_opps_genpd(struct device *dev,
return 0;
}
-/* This is only called for PM domain for now */
-static int _set_required_opps(struct device *dev, struct opp_table *opp_table,
- struct dev_pm_opp *opp, bool up)
-{
- /* required-opps not fully initialized yet */
- if (lazy_linking_pending(opp_table))
- return -EBUSY;
-
- if (opp_table->set_required_opps)
- return opp_table->set_required_opps(dev, opp_table, opp, up);
-
- return 0;
-}
-
-/* Update set_required_opps handler */
-void _update_set_required_opps(struct opp_table *opp_table)
-{
- /* Already set */
- if (opp_table->set_required_opps)
- return;
-
- /* All required OPPs will belong to genpd or none */
- if (opp_table->required_opp_tables[0]->is_genpd)
- opp_table->set_required_opps = _opp_set_required_opps_genpd;
- else
- opp_table->set_required_opps = _opp_set_required_opps_generic;
-}
-
static int _set_opp_level(struct device *dev, struct opp_table *opp_table,
struct dev_pm_opp *opp)
{
@@ -2406,19 +2354,13 @@ static void _opp_detach_genpd(struct opp_table *opp_table)
{
int index;
- if (!opp_table->genpd_virt_devs)
- return;
-
for (index = 0; index < opp_table->required_opp_count; index++) {
- if (!opp_table->genpd_virt_devs[index])
+ if (!opp_table->required_devs[index])
continue;
- dev_pm_domain_detach(opp_table->genpd_virt_devs[index], false);
- opp_table->genpd_virt_devs[index] = NULL;
+ dev_pm_domain_detach(opp_table->required_devs[index], false);
+ opp_table->required_devs[index] = NULL;
}
-
- kfree(opp_table->genpd_virt_devs);
- opp_table->genpd_virt_devs = NULL;
}
/*
@@ -2445,14 +2387,14 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
int index = 0, ret = -EINVAL;
const char * const *name = names;
- if (opp_table->genpd_virt_devs)
- return 0;
+ if (!opp_table->required_devs) {
+ dev_err(dev, "Required OPPs not available, can't attach genpd\n");
+ return -EINVAL;
+ }
- opp_table->genpd_virt_devs = kcalloc(opp_table->required_opp_count,
- sizeof(*opp_table->genpd_virt_devs),
- GFP_KERNEL);
- if (!opp_table->genpd_virt_devs)
- return -ENOMEM;
+ /* Checking only the first one is enough ? */
+ if (opp_table->required_devs[0])
+ return 0;
while (*name) {
if (index >= opp_table->required_opp_count) {
@@ -2468,13 +2410,25 @@ static int _opp_attach_genpd(struct opp_table *opp_table, struct device *dev,
goto err;
}
- opp_table->genpd_virt_devs[index] = virt_dev;
+ /*
+ * Add the virtual genpd device as a user of the OPP table, so
+ * we can call dev_pm_opp_set_opp() on it directly.
+ *
+ * This will be automatically removed when the OPP table is
+ * removed, don't need to handle that here.
+ */
+ if (!_add_opp_dev(virt_dev, opp_table->required_opp_tables[index])) {
+ ret = -ENOMEM;
+ goto err;
+ }
+
+ opp_table->required_devs[index] = virt_dev;
index++;
name++;
}
if (virt_devs)
- *virt_devs = opp_table->genpd_virt_devs;
+ *virt_devs = opp_table->required_devs;
return 0;
@@ -2484,10 +2438,42 @@ err:
}
+static int _opp_set_required_devs(struct opp_table *opp_table,
+ struct device *dev,
+ struct device **required_devs)
+{
+ int i;
+
+ if (!opp_table->required_devs) {
+ dev_err(dev, "Required OPPs not available, can't set required devs\n");
+ return -EINVAL;
+ }
+
+ /* Another device that shares the OPP table has set the required devs ? */
+ if (opp_table->required_devs[0])
+ return 0;
+
+ for (i = 0; i < opp_table->required_opp_count; i++)
+ opp_table->required_devs[i] = required_devs[i];
+
+ return 0;
+}
+
+static void _opp_put_required_devs(struct opp_table *opp_table)
+{
+ int i;
+
+ for (i = 0; i < opp_table->required_opp_count; i++)
+ opp_table->required_devs[i] = NULL;
+}
+
static void _opp_clear_config(struct opp_config_data *data)
{
- if (data->flags & OPP_CONFIG_GENPD)
+ if (data->flags & OPP_CONFIG_REQUIRED_DEVS)
+ _opp_put_required_devs(data->opp_table);
+ else if (data->flags & OPP_CONFIG_GENPD)
_opp_detach_genpd(data->opp_table);
+
if (data->flags & OPP_CONFIG_REGULATOR)
_opp_put_regulators(data->opp_table);
if (data->flags & OPP_CONFIG_SUPPORTED_HW)
@@ -2601,12 +2587,22 @@ int dev_pm_opp_set_config(struct device *dev, struct dev_pm_opp_config *config)
/* Attach genpds */
if (config->genpd_names) {
+ if (config->required_devs)
+ goto err;
+
ret = _opp_attach_genpd(opp_table, dev, config->genpd_names,
config->virt_devs);
if (ret)
goto err;
data->flags |= OPP_CONFIG_GENPD;
+ } else if (config->required_devs) {
+ ret = _opp_set_required_devs(opp_table, dev,
+ config->required_devs);
+ if (ret)
+ goto err;
+
+ data->flags |= OPP_CONFIG_REQUIRED_DEVS;
}
ret = xa_alloc(&opp_configs, &id, data, XA_LIMIT(1, INT_MAX),
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-03 22:18:51 +0100