Add the reverse of ipu_idmac_select_buffer(), that is, clear a buffer
ready status in a channel.
Signed-off-by: Steve Longerbeam <steve_longerbeam@xxxxxxxxxx>
---
drivers/staging/imx-drm/ipu-v3/ipu-common.c | 28 +++++++++++++++++++++++++++
include/linux/platform_data/imx-ipu-v3.h | 1 +
2 files changed, 29 insertions(+)
diff --git a/drivers/staging/imx-drm/ipu-v3/ipu-common.c b/drivers/staging/imx-drm/ipu-v3/ipu-common.c
index 3ff55da..fd15eae 100644
--- a/drivers/staging/imx-drm/ipu-v3/ipu-common.c
+++ b/drivers/staging/imx-drm/ipu-v3/ipu-common.c
@@ -798,6 +798,34 @@ void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num)
}
EXPORT_SYMBOL_GPL(ipu_idmac_select_buffer);
+void ipu_idmac_clear_buffer(struct ipuv3_channel *channel, u32 buf_num)
+{
+ struct ipu_soc *ipu = channel->ipu;
+ unsigned int chno = channel->num;
+ unsigned long flags;
+
+ spin_lock_irqsave(&ipu->lock, flags);
+
+ ipu_cm_write(ipu, 0xF0300000, IPU_GPR); /* write one to clear */
+ switch (buf_num) {
+ case 0:
+ ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF0_RDY(chno));
+ break;
+ case 1:
+ ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF1_RDY(chno));
+ break;
+ case 2:
+ ipu_cm_write(ipu, idma_mask(chno), IPU_CHA_BUF2_RDY(chno));
+ break;
+ default:
+ break;
+ }
+ ipu_cm_write(ipu, 0x0, IPU_GPR); /* write one to set */
+
+ spin_unlock_irqrestore(&ipu->lock, flags);
+}
+EXPORT_SYMBOL_GPL(ipu_idmac_clear_buffer);
+
int ipu_idmac_enable_channel(struct ipuv3_channel *channel)
{
struct ipu_soc *ipu = channel->ipu;
diff --git a/include/linux/platform_data/imx-ipu-v3.h b/include/linux/platform_data/imx-ipu-v3.h
index 0128667..480c30d 100644
--- a/include/linux/platform_data/imx-ipu-v3.h
+++ b/include/linux/platform_data/imx-ipu-v3.h
@@ -199,6 +199,7 @@ int ipu_idmac_wait_busy(struct ipuv3_channel *channel, int ms);
void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel,
bool doublebuffer);
void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num);
+void ipu_idmac_clear_buffer(struct ipuv3_channel *channel, u32 buf_num);
bool ipu_idmac_buffer_is_ready(struct ipuv3_channel *channel, u32 buf_num);
/*
--
1.7.9.5
--
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