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msm: dcvs: check power collapse state after updating params

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The dcvs params are updated when the number of online cores change.
When this happens, the low power modes of each CPU need to be
enabled or disabled depending on how fast they are running and what
the new power collapse frequency thresholds are.

(cherry picked from commit 1b82c72e23f013ea2bdc526ad2859b421a97f48a)

Change-Id: I88c779dc21f47acd7a1fa1ded02e90825d7dc9d6
Signed-off-by: Steve Muckle <smuckle@codeaurora.org>
This commit is contained in:
Steve Muckle 2012-12-06 14:34:38 -08:00 committed by Stephen Boyd
parent be237a3b3e
commit 43b7c2f7ea
1 changed files with 20 additions and 12 deletions
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32
arch/arm/mach-msm/msm_dcvs.c
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@ -151,6 +151,7 @@ static struct msm_dcvs_freq_entry cpu_freq_tbl[DCVS_MAX_NUM_FREQS];
static unsigned num_cpu_freqs;
static struct msm_dcvs_platform_data *dcvs_pdata;
static DEFINE_MUTEX(param_update_mutex);
static DEFINE_MUTEX(gpu_floor_mutex);
static void force_stop_slack_timer(struct dcvs_core *core)
@ -309,6 +310,20 @@ void msm_dcvs_apply_gpu_floor(unsigned long cpu_freq)
mutex_unlock(&gpu_floor_mutex);
}
static void check_power_collapse_modes(struct dcvs_core *core)
{
struct msm_dcvs_algo_param *params;
params = &core_list[CPU_OFFSET + num_online_cpus() - 1].algo_param;
if (core->actual_freq >= params->disable_pc_threshold)
core->idle_enable(core->type_core_num,
MSM_DCVS_DISABLE_HIGH_LATENCY_MODES);
else
core->idle_enable(core->type_core_num,
MSM_DCVS_ENABLE_HIGH_LATENCY_MODES);
}
static int __msm_dcvs_change_freq(struct dcvs_core *core)
{
int ret = 0;
@ -355,17 +370,9 @@ repeat:
core->freq_change_us = (uint32_t)ktime_to_us(
ktime_sub(ktime_get(), time_start));
/**
* Disable low power modes if the actual frequency is >
* disable_pc_threshold.
*/
if (core->actual_freq > core->algo_param.disable_pc_threshold) {
core->idle_enable(core->type_core_num,
MSM_DCVS_DISABLE_HIGH_LATENCY_MODES);
} else if (core->actual_freq <= core->algo_param.disable_pc_threshold) {
core->idle_enable(core->type_core_num,
MSM_DCVS_ENABLE_HIGH_LATENCY_MODES);
}
mutex_lock(&param_update_mutex);
check_power_collapse_modes(core);
mutex_unlock(&param_update_mutex);
/**
* Update algorithm with new freq and time taken to change
@ -556,7 +563,6 @@ static enum hrtimer_restart msm_dcvs_core_slack_timer(struct hrtimer *timer)
int msm_dcvs_update_algo_params(void)
{
static struct msm_dcvs_algo_param curr_params;
static DEFINE_MUTEX(param_update_mutex);
struct msm_dcvs_algo_param *new_params;
int cpu, ret = 0;
@ -566,6 +572,7 @@ int msm_dcvs_update_algo_params(void)
if (memcmp(&curr_params, new_params,
sizeof(struct msm_dcvs_algo_param))) {
for_each_possible_cpu(cpu) {
struct dcvs_core *core = &core_list[CPU_OFFSET + cpu];
ret = msm_dcvs_scm_set_algo_params(CPU_OFFSET + cpu,
new_params);
if (ret) {
@ -574,6 +581,7 @@ int msm_dcvs_update_algo_params(void)
mutex_unlock(&param_update_mutex);
return ret;
}
check_power_collapse_modes(core);
}
memcpy(&curr_params, new_params,
sizeof(struct msm_dcvs_algo_param));