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-rw-r--r--drivers/pmdomain/core.c41
-rw-r--r--drivers/pmdomain/governor.c18
-rw-r--r--drivers/pmdomain/imx/gpcv2.c2
-rw-r--r--drivers/pmdomain/imx/imx8m-blk-ctrl.c25
-rw-r--r--drivers/pmdomain/renesas/rcar-gen4-sysc.c5
-rw-r--r--drivers/pmdomain/renesas/rcar-sysc.c5
-rw-r--r--drivers/pmdomain/ti/Kconfig2
7 files changed, 82 insertions, 16 deletions
diff --git a/drivers/pmdomain/core.c b/drivers/pmdomain/core.c
index 534a93e45e50..2ca6834c661b 100644
--- a/drivers/pmdomain/core.c
+++ b/drivers/pmdomain/core.c
@@ -731,6 +731,37 @@ bool dev_pm_genpd_get_hwmode(struct device *dev)
}
EXPORT_SYMBOL_GPL(dev_pm_genpd_get_hwmode);
+/**
+ * dev_pm_genpd_rpm_always_on() - Control if the PM domain can be powered off.
+ *
+ * @dev: Device for which the PM domain may need to stay on for.
+ * @on: Value to set or unset for the condition.
+ *
+ * For some usecases a consumer driver requires its device to remain power-on
+ * from the PM domain perspective during runtime. This function allows the
+ * behaviour to be dynamically controlled for a device attached to a genpd.
+ *
+ * It is assumed that the users guarantee that the genpd wouldn't be detached
+ * while this routine is getting called.
+ *
+ * Return: Returns 0 on success and negative error values on failures.
+ */
+int dev_pm_genpd_rpm_always_on(struct device *dev, bool on)
+{
+ struct generic_pm_domain *genpd;
+
+ genpd = dev_to_genpd_safe(dev);
+ if (!genpd)
+ return -ENODEV;
+
+ genpd_lock(genpd);
+ dev_gpd_data(dev)->rpm_always_on = on;
+ genpd_unlock(genpd);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(dev_pm_genpd_rpm_always_on);
+
static int _genpd_power_on(struct generic_pm_domain *genpd, bool timed)
{
unsigned int state_idx = genpd->state_idx;
@@ -905,6 +936,10 @@ static int genpd_power_off(struct generic_pm_domain *genpd, bool one_dev_on,
if (!pm_runtime_suspended(pdd->dev) ||
irq_safe_dev_in_sleep_domain(pdd->dev, genpd))
not_suspended++;
+
+ /* The device may need its PM domain to stay powered on. */
+ if (to_gpd_data(pdd)->rpm_always_on)
+ return -EBUSY;
}
if (not_suspended > 1 || (not_suspended == 1 && !one_dev_on))
@@ -2311,8 +2346,10 @@ static int genpd_alloc_data(struct generic_pm_domain *genpd)
return 0;
put:
put_device(&genpd->dev);
- if (genpd->free_states == genpd_free_default_power_state)
+ if (genpd->free_states == genpd_free_default_power_state) {
kfree(genpd->states);
+ genpd->states = NULL;
+ }
free:
if (genpd_is_cpu_domain(genpd))
free_cpumask_var(genpd->cpus);
@@ -3171,7 +3208,7 @@ struct device *genpd_dev_pm_attach_by_id(struct device *dev,
/* Verify that the index is within a valid range. */
num_domains = of_count_phandle_with_args(dev->of_node, "power-domains",
"#power-domain-cells");
- if (index >= num_domains)
+ if (num_domains < 0 || index >= num_domains)
return NULL;
/* Allocate and register device on the genpd bus. */
diff --git a/drivers/pmdomain/governor.c b/drivers/pmdomain/governor.c
index d1a10eeebd16..600592f19669 100644
--- a/drivers/pmdomain/governor.c
+++ b/drivers/pmdomain/governor.c
@@ -8,6 +8,7 @@
#include <linux/pm_domain.h>
#include <linux/pm_qos.h>
#include <linux/hrtimer.h>
+#include <linux/cpu.h>
#include <linux/cpuidle.h>
#include <linux/cpumask.h>
#include <linux/ktime.h>
@@ -349,6 +350,8 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd)
struct cpuidle_device *dev;
ktime_t domain_wakeup, next_hrtimer;
ktime_t now = ktime_get();
+ struct device *cpu_dev;
+ s64 cpu_constraint, global_constraint;
s64 idle_duration_ns;
int cpu, i;
@@ -359,6 +362,7 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd)
if (!(genpd->flags & GENPD_FLAG_CPU_DOMAIN))
return true;
+ global_constraint = cpu_latency_qos_limit();
/*
* Find the next wakeup for any of the online CPUs within the PM domain
* and its subdomains. Note, we only need the genpd->cpus, as it already
@@ -372,8 +376,16 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd)
if (ktime_before(next_hrtimer, domain_wakeup))
domain_wakeup = next_hrtimer;
}
+
+ cpu_dev = get_cpu_device(cpu);
+ if (cpu_dev) {
+ cpu_constraint = dev_pm_qos_raw_resume_latency(cpu_dev);
+ if (cpu_constraint < global_constraint)
+ global_constraint = cpu_constraint;
+ }
}
+ global_constraint *= NSEC_PER_USEC;
/* The minimum idle duration is from now - until the next wakeup. */
idle_duration_ns = ktime_to_ns(ktime_sub(domain_wakeup, now));
if (idle_duration_ns <= 0)
@@ -389,8 +401,10 @@ static bool cpu_power_down_ok(struct dev_pm_domain *pd)
*/
i = genpd->state_idx;
do {
- if (idle_duration_ns >= (genpd->states[i].residency_ns +
- genpd->states[i].power_off_latency_ns)) {
+ if ((idle_duration_ns >= (genpd->states[i].residency_ns +
+ genpd->states[i].power_off_latency_ns)) &&
+ (global_constraint >= (genpd->states[i].power_on_latency_ns +
+ genpd->states[i].power_off_latency_ns))) {
genpd->state_idx = i;
return true;
}
diff --git a/drivers/pmdomain/imx/gpcv2.c b/drivers/pmdomain/imx/gpcv2.c
index d9dab57bb6b3..826e93940e68 100644
--- a/drivers/pmdomain/imx/gpcv2.c
+++ b/drivers/pmdomain/imx/gpcv2.c
@@ -1559,7 +1559,7 @@ static int imx_pgc_domain_probe(struct platform_device *pdev)
}
if (IS_ENABLED(CONFIG_LOCKDEP) &&
- of_property_read_bool(domain->dev->of_node, "power-domains"))
+ of_property_present(domain->dev->of_node, "power-domains"))
lockdep_set_subclass(&domain->genpd.mlock, 1);
ret = of_genpd_add_provider_simple(domain->dev->of_node,
diff --git a/drivers/pmdomain/imx/imx8m-blk-ctrl.c b/drivers/pmdomain/imx/imx8m-blk-ctrl.c
index 14a0b3508981..57f4f072640b 100644
--- a/drivers/pmdomain/imx/imx8m-blk-ctrl.c
+++ b/drivers/pmdomain/imx/imx8m-blk-ctrl.c
@@ -752,6 +752,15 @@ static const struct imx8m_blk_ctrl_data imx8mn_disp_blk_ctl_dev_data = {
.num_domains = ARRAY_SIZE(imx8mn_disp_blk_ctl_domain_data),
};
+#define LCDIF_ARCACHE_CTRL 0x4c
+#define LCDIF_1_RD_HURRY GENMASK(15, 13)
+#define LCDIF_0_RD_HURRY GENMASK(12, 10)
+
+#define ISI_CACHE_CTRL 0x50
+#define ISI_V_WR_HURRY GENMASK(28, 26)
+#define ISI_U_WR_HURRY GENMASK(25, 23)
+#define ISI_Y_WR_HURRY GENMASK(22, 20)
+
static int imx8mp_media_power_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
@@ -771,8 +780,24 @@ static int imx8mp_media_power_notifier(struct notifier_block *nb,
* bit. On power down the GPC driver waits for the handshake.
*/
if (action == GENPD_NOTIFY_ON)
+ {
udelay(5);
+ /*
+ * Set panic read hurry level for both LCDIF interfaces to
+ * maximum priority to minimize chances of display FIFO
+ * underflow.
+ */
+ regmap_set_bits(bc->regmap, LCDIF_ARCACHE_CTRL,
+ FIELD_PREP(LCDIF_1_RD_HURRY, 7) |
+ FIELD_PREP(LCDIF_0_RD_HURRY, 7));
+ /* Same here for ISI */
+ regmap_set_bits(bc->regmap, ISI_CACHE_CTRL,
+ FIELD_PREP(ISI_V_WR_HURRY, 7) |
+ FIELD_PREP(ISI_U_WR_HURRY, 7) |
+ FIELD_PREP(ISI_Y_WR_HURRY, 7));
+ }
+
return NOTIFY_OK;
}
diff --git a/drivers/pmdomain/renesas/rcar-gen4-sysc.c b/drivers/pmdomain/renesas/rcar-gen4-sysc.c
index 66409cff2083..e001b5c25bed 100644
--- a/drivers/pmdomain/renesas/rcar-gen4-sysc.c
+++ b/drivers/pmdomain/renesas/rcar-gen4-sysc.c
@@ -338,11 +338,6 @@ static int __init rcar_gen4_sysc_pd_init(void)
struct rcar_gen4_sysc_pd *pd;
size_t n;
- if (!area->name) {
- /* Skip NULLified area */
- continue;
- }
-
n = strlen(area->name) + 1;
pd = kzalloc(sizeof(*pd) + n, GFP_KERNEL);
if (!pd) {
diff --git a/drivers/pmdomain/renesas/rcar-sysc.c b/drivers/pmdomain/renesas/rcar-sysc.c
index b99326917330..1e2948523789 100644
--- a/drivers/pmdomain/renesas/rcar-sysc.c
+++ b/drivers/pmdomain/renesas/rcar-sysc.c
@@ -396,11 +396,6 @@ static int __init rcar_sysc_pd_init(void)
struct rcar_sysc_pd *pd;
size_t n;
- if (!area->name) {
- /* Skip NULLified area */
- continue;
- }
-
n = strlen(area->name) + 1;
pd = kzalloc(sizeof(*pd) + n, GFP_KERNEL);
if (!pd) {
diff --git a/drivers/pmdomain/ti/Kconfig b/drivers/pmdomain/ti/Kconfig
index 67c608bf7ed0..5386b362a7ab 100644
--- a/drivers/pmdomain/ti/Kconfig
+++ b/drivers/pmdomain/ti/Kconfig
@@ -10,7 +10,7 @@ if SOC_TI
config TI_SCI_PM_DOMAINS
tristate "TI SCI PM Domains Driver"
depends on TI_SCI_PROTOCOL
- depends on PM_GENERIC_DOMAINS
+ select PM_GENERIC_DOMAINS if PM
help
Generic power domain implementation for TI device implementing
the TI SCI protocol.
generated by cgit v1.2.3 (git 2.0.4) at 2025-10-16 01:49:49 +0000