void isph3a_aewb_try_enable(struct isp_h3a_device *isp_h3a)
{
unsigned long irqflags;
spin_lock_irqsave(isp_h3a->lock, irqflags);
if (!isp_h3a->enabled && isp_h3a->aewb_config_local.aewb_enable) {
isp_h3a->update = 1;
isp_h3a->buf_next = ispstat_buf_next(&isp_h3a->stat);
spin_unlock_irqrestore(isp_h3a->lock, irqflags);
isph3a_aewb_config_registers(isp_h3a);
isph3a_aewb_enable(isp_h3a, 1);
} else
spin_unlock_irqrestore(isp_h3a->lock, irqflags);
}
/**
* isph3a_aewb_configure - Configure AEWB regs, enable/disable H3A engine.
* @aewbcfg: Pointer to AEWB config structure.
*
* Returns 0 if successful, -EINVAL if aewbcfg pointer is NULL, -ENOMEM if
* was unable to allocate memory for the buffer, of other errors if H3A
* callback is not set or the parameters for AEWB are invalid.
**/
int isph3a_aewb_configure(struct isp_h3a_device *isp_h3a,
struct isph3a_aewb_config *aewbcfg)
{
int ret = 0;
int win_count = 0;
unsigned int buf_size;
unsigned long irqflags;
struct ispstat_buffer *buf;
if (NULL == aewbcfg) {
dev_info(isp_h3a->dev, "h3a: Null argument in configuration\n");
return -EINVAL;
}
ret = isph3a_aewb_validate_params(isp_h3a, aewbcfg);
if (ret)
return ret;
/* FIXME: This win_count handling looks really fishy. */
win_count = aewbcfg->ver_win_count * aewbcfg->hor_win_count;
win_count += aewbcfg->hor_win_count;
ret = win_count / 8;
win_count += win_count % 8 ? 1 : 0;
win_count += ret;
buf_size = win_count * AEWB_PACKET_SIZE;
ret = ispstat_bufs_alloc(&isp_h3a->stat, buf_size);
if (ret)
return ret;
buf = ispstat_buf_next(&isp_h3a->stat);
spin_lock_irqsave(isp_h3a->lock, irqflags);
isp_h3a->win_count = win_count;
isph3a_aewb_set_params(isp_h3a, aewbcfg);
isp_reg_writel(isp_h3a->dev, buf->iommu_addr,
OMAP3_ISP_IOMEM_H3A, ISPH3A_AEWBUFST);
spin_unlock_irqrestore(isp_h3a->lock, irqflags);
isph3a_aewb_enable(isp_h3a, aewbcfg->aewb_enable);
isph3a_print_status(isp_h3a);
return 0;
}