Adds ipu_smfc_set_watermark() which programs a channel's SMFC FIFO
levels at which the watermark signal is set and cleared.
Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
---
drivers/gpu/ipu-v3/ipu-smfc.c | 20 ++++++++++++++++++++
include/video/imx-ipu-v3.h | 1 +
2 files changed, 21 insertions(+)
diff --git a/drivers/gpu/ipu-v3/ipu-smfc.c b/drivers/gpu/ipu-v3/ipu-smfc.c
index a6429ca..6ca9b43 100644
--- a/drivers/gpu/ipu-v3/ipu-smfc.c
+++ b/drivers/gpu/ipu-v3/ipu-smfc.c
@@ -80,6 +80,26 @@ int ipu_smfc_map_channel(struct ipu_smfc *smfc, int csi_id, int mipi_id)
}
EXPORT_SYMBOL_GPL(ipu_smfc_map_channel);
+int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level)
+{
+ struct ipu_smfc_priv *priv = smfc->priv;
+ unsigned long flags;
+ u32 val, shift;
+
+ spin_lock_irqsave(&priv->lock, flags);
+
+ shift = smfc->chno * 6 + (smfc->chno > 1 ? 4 : 0);
+ val = readl(priv->base + SMFC_WMC);
+ val &= ~(0x3f << shift);
+ val |= ((clr_level << 3) | set_level) << shift;
+ writel(val, priv->base + SMFC_WMC);
+
+ spin_unlock_irqrestore(&priv->lock, flags);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(ipu_smfc_set_watermark);
+
int ipu_smfc_enable(struct ipu_smfc *smfc)
{
struct ipu_smfc_priv *priv = smfc->priv;
diff --git a/include/video/imx-ipu-v3.h b/include/video/imx-ipu-v3.h
index 27fb980..e69b247 100644
--- a/include/video/imx-ipu-v3.h
+++ b/include/video/imx-ipu-v3.h
@@ -297,6 +297,7 @@ int ipu_smfc_enable(struct ipu_smfc *smfc);
int ipu_smfc_disable(struct ipu_smfc *smfc);
int ipu_smfc_map_channel(struct ipu_smfc *smfc, int csi_id, int mipi_id);
int ipu_smfc_set_burstsize(struct ipu_smfc *smfc, int burstsize);
+int ipu_smfc_set_watermark(struct ipu_smfc *smfc, u32 set_level, u32 clr_level);
#define IPU_CPMEM_WORD(word, ofs, size) ((((word) * 160 + (ofs)) << 8) | (size))
--
1.7.9.5
--
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