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input/buttons: Fix the event lose between the invocation of poll 

Signed-off-by: xueyanhong <xueyanhong@xiaomi.com>
This commit is contained in:
xueyanhong 2022-01-27 19:02:06 +08:00 committed by Petro Karashchenko
parent 2c8437151f
commit b953296de7
1 changed files with 21 additions and 0 deletions
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21
drivers/input/button_upper.c
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@ -95,6 +95,7 @@ struct btn_open_s
* driver events.
*/
bool bo_pending;
FAR struct pollfd *bo_fds[CONFIG_INPUT_BUTTONS_NPOLLWAITERS];
};
@ -281,6 +282,10 @@ static void btn_sample(FAR struct btn_upperhalf_s *priv)
for (opriv = priv->bu_open; opriv; opriv = opriv->bo_flink)
{
/* Always set bo_pending true, only clear it after button read */
opriv->bo_pending = true;
/* Have any poll events occurred? */
if ((press & opriv->bo_pollevents.bp_press) != 0 ||
@ -488,11 +493,13 @@ static ssize_t btn_read(FAR struct file *filep, FAR char *buffer,
size_t len)
{
FAR struct inode *inode;
FAR struct btn_open_s *opriv;
FAR struct btn_upperhalf_s *priv;
FAR const struct btn_lowerhalf_s *lower;
int ret;
DEBUGASSERT(filep && filep->f_inode);
opriv = filep->f_priv;
inode = filep->f_inode;
DEBUGASSERT(inode->i_private);
priv = (FAR struct btn_upperhalf_s *)inode->i_private;
@ -523,6 +530,7 @@ static ssize_t btn_read(FAR struct file *filep, FAR char *buffer,
lower = priv->bu_lower;
DEBUGASSERT(lower && lower->bl_buttons);
*(FAR btn_buttonset_t *)buffer = lower->bl_buttons(lower);
opriv->bo_pending = false;
btn_givesem(&priv->bu_exclsem);
return (ssize_t)sizeof(btn_buttonset_t);
@ -759,6 +767,19 @@ static int btn_poll(FAR struct file *filep, FAR struct pollfd *fds,
opriv->bo_fds[i] = fds;
fds->priv = &opriv->bo_fds[i];
/* Report if the event is pending */
if (opriv->bo_pending)
{
fds->revents |= (fds->events & POLLIN);
if (fds->revents != 0)
{
iinfo("Report events: %02x\n", fds->revents);
nxsem_post(fds->sem);
}
}
break;
}
}