static void isp_stat_try_enable(struct ispstat *stat)
{
unsigned long irqflags;
if (stat->priv == NULL)
return;
spin_lock_irqsave(&stat->isp->stat_lock, irqflags);
if (stat->state == ISPSTAT_ENABLING && !stat->buf_processing &&
stat->buf_alloc_size) {
stat->update = 1;
isp_stat_buf_next(stat);
stat->ops->setup_regs(stat, stat->priv);
isp_stat_buf_insert_magic(stat, stat->active_buf);
if (!IS_H3A(stat))
atomic_set(&stat->buf_err, 0);
isp_stat_pcr_enable(stat, 1);
spin_unlock_irqrestore(&stat->isp->stat_lock, irqflags);
dev_dbg(stat->isp->dev, "%s: module is enabled.\n",
stat->subdev.name);
} else {
spin_unlock_irqrestore(&stat->isp->stat_lock, irqflags);
}
}
/*
* isp_stat_buf_process - Process statistic buffers.
* @buf_state: points out if buffer is ready to be processed. It's necessary
* because histogram needs to copy the data from internal memory
* before be able to process the buffer.
*/
static int isp_stat_buf_process(struct ispstat *stat, int buf_state)
{
int ret = STAT_NO_BUF;
if (!atomic_add_unless(&stat->buf_err, -1, 0) &&
buf_state == STAT_BUF_DONE && stat->state == ISPSTAT_ENABLED) {
ret = isp_stat_buf_queue(stat);
isp_stat_buf_next(stat);
}
return ret;
}
static void isp_stat_try_enable(struct ispstat *stat)
{
unsigned long irqflags;
if (stat->priv == NULL)
/* driver wasn't initialised */
return;
spin_lock_irqsave(&stat->isp->stat_lock, irqflags);
if (stat->state == ISPSTAT_ENABLING && !stat->buf_processing &&
stat->buf_alloc_size) {
/*
* Userspace's requested to enable the engine but it wasn't yet.
* Let's do that now.
*/
stat->update = 1;
isp_stat_buf_next(stat);
stat->ops->setup_regs(stat, stat->priv);
isp_stat_buf_insert_magic(stat, stat->active_buf);
/*
* H3A module has some hw issues which forces the driver to
* ignore next buffers even if it was disabled in the meantime.
* On the other hand, Histogram shouldn't ignore buffers anymore
* if it's being enabled.
*/
if (!IS_H3A(stat))
atomic_set(&stat->buf_err, 0);
isp_stat_pcr_enable(stat, 1);
spin_unlock_irqrestore(&stat->isp->stat_lock, irqflags);
dev_dbg(stat->isp->dev, "%s: module is enabled.\n",
stat->subdev.name);
} else {
spin_unlock_irqrestore(&stat->isp->stat_lock, irqflags);
}
}
