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| author | Steve Longerbeam <slongerbeam@gmail.com> | 2014-06-25 18:05:41 -0700 |
|---|---|---|
| committer | Philipp Zabel <p.zabel@pengutronix.de> | 2014-09-02 14:55:49 +0200 |
| commit | bce6f087a958a21500c51a9e63a5f578f5b0510c (patch) | |
| tree | 15897ad9210634a5ff35ad30d3ac7e538ddf8f09 /drivers/gpu/ipu-v3 | |
| parent | aa52f57894b93dcfdd615b35a7579e161f1e7a38 (diff) | |
| download | linux-bce6f087a958a21500c51a9e63a5f578f5b0510c.tar.gz linux-bce6f087a958a21500c51a9e63a5f578f5b0510c.tar.bz2 linux-bce6f087a958a21500c51a9e63a5f578f5b0510c.zip | |
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.c | 28 |
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; |