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PM / devfreq: rockchip_dmc: Update cpu dma latency when change frequency

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Change-Id: Ia063ce7da2f68ffac4068f4f8136acf178a28918
Signed-off-by: Finley Xiao <finley.xiao@rock-chips.com>
Signed-off-by: YouMin Chen <cym@rock-chips.com>
This commit is contained in:
Finley Xiao 2018-04-22 21:11:27 +08:00 committed by Tao Huang
parent 767bd670b9
commit e37dce72a0
1 changed files with 16 additions and 0 deletions
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16
drivers/devfreq/rockchip_dmc.c
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@ -34,6 +34,7 @@
#include <linux/of_irq.h>
#include <linux/platform_device.h>
#include <linux/pm_opp.h>
#include <linux/pm_qos.h>
#include <linux/reboot.h>
#include <linux/regulator/consumer.h>
#include <linux/rockchip/rockchip_sip.h>
@ -808,6 +809,8 @@ struct rockchip_dmcfreq {
int (*set_auto_self_refresh)(u32 en);
};
static struct pm_qos_request pm_qos;
/*
* function: packaging de-skew setting to px30_ddr_dts_config_timing,
* px30_ddr_dts_config_timing will pass to trust firmware, and
@ -1606,8 +1609,18 @@ int rockchip_dmcfreq_wait_complete(void)
return 0;
}
wait_ctrl.wait_flag = -1;
/*
* CPUs only enter WFI when idle to make sure that
* FIQn can quick response.
*/
pm_qos_update_request(&pm_qos, 0);
wait_event_timeout(wait_ctrl.wait_wq, (wait_ctrl.wait_flag == 0),
msecs_to_jiffies(wait_ctrl.wait_time_out_ms));
pm_qos_update_request(&pm_qos, PM_QOS_DEFAULT_VALUE);
return 0;
}
@ -2986,6 +2999,9 @@ static int rockchip_dmcfreq_probe(struct platform_device *pdev)
else
data->touchboostpulse_duration_val = 500 * USEC_PER_MSEC;
pm_qos_add_request(&pm_qos, PM_QOS_CPU_DMA_LATENCY,
PM_QOS_DEFAULT_VALUE);
ret = devfreq_add_governor(&devfreq_dmc_ondemand);
if (ret) {
dev_err(dev, "Failed to add rockchip governor: %d\n", ret);