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path: root/drivers/gpu/ipu-v3/ipu-common.c
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Diffstat (limited to 'drivers/gpu/ipu-v3/ipu-common.c')
-rw-r--r--drivers/gpu/ipu-v3/ipu-common.c26
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index 18563c240f10..fec72c0d18ba 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -232,7 +232,7 @@ void ipu_idmac_put(struct ipuv3_channel *channel)
}
EXPORT_SYMBOL_GPL(ipu_idmac_put);
-#define idma_mask(ch) (1 << (ch & 0x1f))
+#define idma_mask(ch) (1 << ((ch) & 0x1f))
void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel,
bool doublebuffer)
@@ -315,6 +315,30 @@ int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel)
}
EXPORT_SYMBOL_GPL(ipu_idmac_get_current_buffer);
+bool ipu_idmac_buffer_is_ready(struct ipuv3_channel *channel, u32 buf_num)
+{
+ struct ipu_soc *ipu = channel->ipu;
+ unsigned long flags;
+ u32 reg = 0;
+
+ spin_lock_irqsave(&ipu->lock, flags);
+ switch (buf_num) {
+ case 0:
+ reg = ipu_cm_read(ipu, IPU_CHA_BUF0_RDY(channel->num));
+ break;
+ case 1:
+ reg = ipu_cm_read(ipu, IPU_CHA_BUF1_RDY(channel->num));
+ break;
+ case 2:
+ reg = ipu_cm_read(ipu, IPU_CHA_BUF2_RDY(channel->num));
+ break;
+ }
+ spin_unlock_irqrestore(&ipu->lock, flags);
+
+ return ((reg & idma_mask(channel->num)) != 0);
+}
+EXPORT_SYMBOL_GPL(ipu_idmac_buffer_is_ready);
+
void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num)
{
struct ipu_soc *ipu = channel->ipu;

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