diff options
Diffstat (limited to 'drivers/gpu/ipu-v3')
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-dc.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-dc.c b/drivers/gpu/ipu-v3/ipu-dc.c index 2326c752d89b..323203d0503a 100644 --- a/drivers/gpu/ipu-v3/ipu-dc.c +++ b/drivers/gpu/ipu-v3/ipu-dc.c @@ -114,6 +114,7 @@ struct ipu_dc_priv { struct completion comp; int dc_irq; int dp_irq; + int use_count; }; static void dc_link_event(struct ipu_dc *dc, int event, int addr, int priority) @@ -232,7 +233,16 @@ EXPORT_SYMBOL_GPL(ipu_dc_init_sync); void ipu_dc_enable(struct ipu_soc *ipu) { - ipu_module_enable(ipu, IPU_CONF_DC_EN); + struct ipu_dc_priv *priv = ipu->dc_priv; + + mutex_lock(&priv->mutex); + + if (!priv->use_count) + ipu_module_enable(priv->ipu, IPU_CONF_DC_EN); + + priv->use_count++; + + mutex_unlock(&priv->mutex); } EXPORT_SYMBOL_GPL(ipu_dc_enable); @@ -294,7 +304,18 @@ EXPORT_SYMBOL_GPL(ipu_dc_disable_channel); void ipu_dc_disable(struct ipu_soc *ipu) { - ipu_module_disable(ipu, IPU_CONF_DC_EN); + struct ipu_dc_priv *priv = ipu->dc_priv; + + mutex_lock(&priv->mutex); + + priv->use_count--; + if (!priv->use_count) + ipu_module_disable(priv->ipu, IPU_CONF_DC_EN); + + if (priv->use_count < 0) + priv->use_count = 0; + + mutex_unlock(&priv->mutex); } EXPORT_SYMBOL_GPL(ipu_dc_disable); |