[RFC PATCH 1/6] soc: ti: k3-ringacc: Add helper to get realtime count of free elements

[Siddharth Vadapalli <s-vadapalli@ti.com>]

The existing helper k3_ringacc_ring_get_free() updates the count of free
elements only when the software maintained counter decrements to zero.
As a result, for batch processing, we may read a lower count of free
elements than the actual count. To address this, introduce a new helper
that provides realtime count of free elements.

Signed-off-by: Siddharth Vadapalli <s-vadapalli@ti.com>
---
 drivers/soc/ti/k3-ringacc.c       | 11 +++++++++++
 include/linux/soc/ti/k3-ringacc.h |  8 ++++++++
 2 files changed, 19 insertions(+)

diff --git a/drivers/soc/ti/k3-ringacc.c b/drivers/soc/ti/k3-ringacc.c
index 7602b8a909b0..1751d42ee2d3 100644
--- a/drivers/soc/ti/k3-ringacc.c
+++ b/drivers/soc/ti/k3-ringacc.c
@@ -905,6 +905,17 @@ u32 k3_ringacc_ring_get_free(struct k3_ring *ring)
 }
 EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_free);
 
+u32 k3_ringacc_ring_get_rt_free(struct k3_ring *ring)
+{
+	if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
+		return -EINVAL;
+
+	ring->state.free = ring->size - k3_ringacc_ring_read_occ(ring);
+
+	return ring->state.free;
+}
+EXPORT_SYMBOL_GPL(k3_ringacc_ring_get_rt_free);
+
 u32 k3_ringacc_ring_get_occ(struct k3_ring *ring)
 {
 	if (!ring || !(ring->flags & K3_RING_FLAG_BUSY))
diff --git a/include/linux/soc/ti/k3-ringacc.h b/include/linux/soc/ti/k3-ringacc.h
index 39b022b92598..091cf551932d 100644
--- a/include/linux/soc/ti/k3-ringacc.h
+++ b/include/linux/soc/ti/k3-ringacc.h
@@ -184,6 +184,14 @@ u32 k3_ringacc_ring_get_size(struct k3_ring *ring);
  */
 u32 k3_ringacc_ring_get_free(struct k3_ring *ring);
 
+/**
+ * k3_ringacc_ring_get_rt_free - get realtime value of free elements
+ * @ring: pointer on ring
+ *
+ * Returns realtime count of free elements in the ring.
+ */
+u32 k3_ringacc_ring_get_rt_free(struct k3_ring *ring);
+
 /**
  * k3_ringacc_ring_get_occ - get ring occupancy
  * @ring: pointer on ring
-- 
2.51.1