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action.c must desist in calling set_cpu_frequency from a tick

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The function is neither reentrant nor ISR callable. Instead of
using a ticked-based timeout, have the button driver provide the
unboost after a delay when waiting for a button.

HAVE_GUI_BOOST gets immediate boost after dequeuing any message,
otherwise the queue has to have at least three messages waiting
for it to trigger a boost-- essentially the behavior that existed
but now combined in one place.

Change-Id: I1d924702840f56a1a65abe41fa92b4e753c4e75a
This commit is contained in:
Michael Sevakis 2017-01-21 08:09:48 -05:00
parent 15e1f592de
commit c6299b268d
3 changed files with 77 additions and 94 deletions
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116
firmware/drivers/button.c
View file

@ -371,21 +371,75 @@ static void button_tick(void)
}
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
static bool button_boosted = false;
static long button_unboost_tick;
#define BUTTON_UNBOOST_TMO HZ
static void button_boost(bool state)
{
static bool boosted = false;
if (state && !boosted)
if (state)
{
cpu_boost(true);
boosted = true;
button_unboost_tick = current_tick + BUTTON_UNBOOST_TMO;
if (!button_boosted)
{
button_boosted = true;
cpu_boost(true);
}
}
else if (!state && boosted)
else if (!state && button_boosted)
{
button_boosted = false;
cpu_boost(false);
boosted = false;
}
}
static void button_queue_wait(struct queue_event *evp, int timeout)
{
/* Loop once after wait time if boosted in order to unboost and wait the
full remaining time */
do
{
int ticks = timeout;
if (ticks == 0) /* TIMEOUT_NOBLOCK */
;
else if (ticks > 0)
{
if (button_boosted && ticks > BUTTON_UNBOOST_TMO)
ticks = BUTTON_UNBOOST_TMO;
timeout -= ticks;
}
else /* TIMEOUT_BLOCK (ticks < 0) */
{
if (button_boosted)
ticks = BUTTON_UNBOOST_TMO;
}
queue_wait_w_tmo(&button_queue, evp, ticks);
if (evp->id != SYS_TIMEOUT)
{
/* GUI boost build gets immediate kick, otherwise at least 3
messages had to be there */
#ifndef HAVE_GUI_BOOST
if (queue_count(&button_queue) >= 2)
#endif
button_boost(true);
break;
}
if (button_boosted && TIME_AFTER(current_tick, button_unboost_tick))
button_boost(false);
}
while (timeout);
}
#else /* ndef HAVE_ADJUSTABLE_CPU_FREQ */
static inline void button_queue_wait(struct queue_event *evp, int timeout)
{
queue_wait_w_timeout(&button_queue, evp, timeout);
}
#endif /* HAVE_ADJUSTABLE_CPU_FREQ */
int button_queue_count( void )
@ -396,44 +450,26 @@ int button_queue_count( void )
long button_get(bool block)
{
struct queue_event ev;
int pending_count = queue_count(&button_queue);
button_queue_wait(&ev, block ? TIMEOUT_BLOCK : TIMEOUT_NOBLOCK);
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
/* Control the CPU boost trying to keep queue empty. */
if (pending_count == 0)
button_boost(false);
else if (pending_count > 2)
button_boost(true);
#endif
if ( block || pending_count )
{
queue_wait(&button_queue, &ev);
button_data = ev.data;
return ev.id;
}
return BUTTON_NONE;
}
long button_get_w_tmo(int ticks)
{
struct queue_event ev;
#ifdef HAVE_ADJUSTABLE_CPU_FREQ
/* Be sure to keep boosted state. */
if (!queue_empty(&button_queue))
return button_get(true);
button_boost(false);
#endif
queue_wait_w_tmo(&button_queue, &ev, ticks);
if (ev.id == SYS_TIMEOUT)
ev.id = BUTTON_NONE;
else
button_data = ev.data;
return ev.id;
}
long button_get_w_tmo(int ticks)
{
struct queue_event ev;
button_queue_wait(&ev, ticks);
if (ev.id == SYS_TIMEOUT)
ev.id = BUTTON_NONE;
else
button_data = ev.data;
return ev.id;
}