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authorSteve Longerbeam <slongerbeam@gmail.com>2014-06-26 05:05:41 +0400
committerPhilipp Zabel <p.zabel@pengutronix.de>2014-09-02 16:55:49 +0400
commitbce6f087a958a21500c51a9e63a5f578f5b0510c (patch)
tree15897ad9210634a5ff35ad30d3ac7e538ddf8f09 /drivers/gpu/ipu-v3
parentaa52f57894b93dcfdd615b35a7579e161f1e7a38 (diff)
downloadlinux-bce6f087a958a21500c51a9e63a5f578f5b0510c.tar.xz
gpu: ipu-v3: Add ipu_idmac_clear_buffer()
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@mentor.com> Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Diffstat (limited to 'drivers/gpu/ipu-v3')
-rw-r--r--drivers/gpu/ipu-v3/ipu-common.c28
1 files changed, 28 insertions, 0 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c
index fec72c0d18ba..773a2fc8fed4 100644
--- a/drivers/gpu/ipu-v3/ipu-common.c
+++ b/drivers/gpu/ipu-v3/ipu-common.c
@@ -357,6 +357,34 @@ 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;