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path: root/drivers/gpu/msm/kgsl_pwrctrl.c
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Diffstat (limited to 'drivers/gpu/msm/kgsl_pwrctrl.c')
-rw-r--r--drivers/gpu/msm/kgsl_pwrctrl.c47
1 files changed, 46 insertions, 1 deletions
diff --git a/drivers/gpu/msm/kgsl_pwrctrl.c b/drivers/gpu/msm/kgsl_pwrctrl.c
index 671639be249a..b884acf067a6 100644
--- a/drivers/gpu/msm/kgsl_pwrctrl.c
+++ b/drivers/gpu/msm/kgsl_pwrctrl.c
@@ -1,4 +1,4 @@
-/* Copyright (c) 2010-2015, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2010-2016, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -53,6 +53,13 @@
#define DEFAULT_BUS_P 25
#define DEFAULT_BUS_DIV (100 / DEFAULT_BUS_P)
+/*
+ * The effective duration of qos request in usecs. After
+ * timeout, qos request is cancelled automatically.
+ * Kept 80ms default, inline with default GPU idle time.
+ */
+#define KGSL_L2PC_CPU_TIMEOUT (80 * 1000)
+
/* Order deeply matters here because reasons. New entries go on the end */
static const char * const clocks[] = {
"src_clk",
@@ -446,6 +453,33 @@ void kgsl_pwrctrl_set_constraint(struct kgsl_device *device,
}
EXPORT_SYMBOL(kgsl_pwrctrl_set_constraint);
+/**
+ * kgsl_pwrctrl_update_l2pc() - Update existing qos request
+ * @device: Pointer to the kgsl_device struct
+ *
+ * Updates an existing qos request to avoid L2PC on the
+ * CPUs (which are selected through dtsi) on which GPU
+ * thread is running. This would help for performance.
+ */
+void kgsl_pwrctrl_update_l2pc(struct kgsl_device *device)
+{
+ int cpu;
+
+ if (device->pwrctrl.l2pc_cpus_mask == 0)
+ return;
+
+ cpu = get_cpu();
+ put_cpu();
+
+ if ((1 << cpu) & device->pwrctrl.l2pc_cpus_mask) {
+ pm_qos_update_request_timeout(
+ &device->pwrctrl.l2pc_cpus_qos,
+ device->pwrctrl.pm_qos_active_latency,
+ KGSL_L2PC_CPU_TIMEOUT);
+ }
+}
+EXPORT_SYMBOL(kgsl_pwrctrl_update_l2pc);
+
static ssize_t kgsl_pwrctrl_thermal_pwrlevel_store(struct device *dev,
struct device_attribute *attr,
const char *buf, size_t count)
@@ -1716,6 +1750,9 @@ int kgsl_pwrctrl_init(struct kgsl_device *device)
&pwr->pm_qos_wakeup_latency))
pwr->pm_qos_wakeup_latency = 101;
+ kgsl_property_read_u32(device, "qcom,l2pc-cpu-mask",
+ &pwr->l2pc_cpus_mask);
+
pm_runtime_enable(&pdev->dev);
ocmem_bus_node = of_find_node_by_name(
@@ -2205,6 +2242,10 @@ _sleep(struct kgsl_device *device)
kgsl_pwrctrl_set_state(device, KGSL_STATE_SLEEP);
pm_qos_update_request(&device->pwrctrl.pm_qos_req_dma,
PM_QOS_DEFAULT_VALUE);
+ if (device->pwrctrl.l2pc_cpus_mask)
+ pm_qos_update_request(
+ &device->pwrctrl.l2pc_cpus_qos,
+ PM_QOS_DEFAULT_VALUE);
break;
case KGSL_STATE_SLUMBER:
break;
@@ -2252,6 +2293,10 @@ _slumber(struct kgsl_device *device)
kgsl_pwrctrl_set_state(device, KGSL_STATE_SLUMBER);
pm_qos_update_request(&device->pwrctrl.pm_qos_req_dma,
PM_QOS_DEFAULT_VALUE);
+ if (device->pwrctrl.l2pc_cpus_mask)
+ pm_qos_update_request(
+ &device->pwrctrl.l2pc_cpus_qos,
+ PM_QOS_DEFAULT_VALUE);
break;
case KGSL_STATE_SUSPEND:
complete_all(&device->hwaccess_gate);