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rk: ddr_freq: better support idle

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黄涛
2012-11-30 14:35:22 +08:00
parent 0848535425
commit 199a818db7
1 changed files with 12 additions and 11 deletions
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23
arch/arm/plat-rk/ddr_freq.c
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@@ -92,8 +92,15 @@ static void ddrfreq_mode(bool auto_self_refresh, unsigned long *target_rate, cha
static noinline void ddrfreq_work(unsigned long sys_status)
{
static struct clk *cpu = NULL;
static struct clk *gpu = NULL;
unsigned long s = sys_status;
if (!cpu)
cpu = clk_get(NULL, "cpu");
if (!gpu)
gpu = clk_get(NULL, "gpu");
dprintk(DEBUG_VERBOSE, "sys_status %02lx\n", sys_status);
if (s & (1 << SYS_STATUS_SUSPEND)) {
ddrfreq_mode(true, &ddr.suspend_rate, "suspend");
@@ -103,7 +110,10 @@ static noinline void ddrfreq_work(unsigned long sys_status)
&& !(s & (1 << SYS_STATUS_GPU))
&& !(s & (1 << SYS_STATUS_RGA))
&& !(s & (1 << SYS_STATUS_CIF0))
&& !(s & (1 << SYS_STATUS_CIF1))) {
&& !(s & (1 << SYS_STATUS_CIF1))
&& (clk_get_rate(cpu) < 816 * MHZ)
&& (clk_get_rate(gpu) <= 200 * MHZ)
) {
ddrfreq_mode(false, &ddr.idle_rate, "idle");
} else {
ddrfreq_mode(false, &ddr.normal_rate, "normal");
@@ -112,20 +122,11 @@ static noinline void ddrfreq_work(unsigned long sys_status)
static int ddrfreq_task(void *data)
{
static bool is_booting = true;
set_freezable();
do {
unsigned long status = ddr.sys_status;
if (is_booting) {
s64 boottime_ms = ktime_to_ms(ktime_get_boottime());
if (boottime_ms > 20 * MSEC_PER_SEC) {
is_booting = false;
}
}
if (!is_booting) {
ddrfreq_work(status);
}
ddrfreq_work(status);
wait_event_freezable(ddr.wait, (status != ddr.sys_status) || kthread_should_stop());
} while (!kthread_should_stop());