diff options
Diffstat (limited to 'drivers/gpu/ipu-v3/ipu-common.c')
| -rw-r--r-- | drivers/gpu/ipu-v3/ipu-common.c | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/drivers/gpu/ipu-v3/ipu-common.c b/drivers/gpu/ipu-v3/ipu-common.c index 18563c2..fec72c0 100644 --- a/drivers/gpu/ipu-v3/ipu-common.c +++ b/drivers/gpu/ipu-v3/ipu-common.c @@ -232,7 +232,7 @@ void ipu_idmac_put(struct ipuv3_channel *channel) } EXPORT_SYMBOL_GPL(ipu_idmac_put); -#define idma_mask(ch) (1 << (ch & 0x1f)) +#define idma_mask(ch) (1 << ((ch) & 0x1f)) void ipu_idmac_set_double_buffer(struct ipuv3_channel *channel, bool doublebuffer) @@ -315,6 +315,30 @@ int ipu_idmac_get_current_buffer(struct ipuv3_channel *channel) } EXPORT_SYMBOL_GPL(ipu_idmac_get_current_buffer); +bool ipu_idmac_buffer_is_ready(struct ipuv3_channel *channel, u32 buf_num) +{ + struct ipu_soc *ipu = channel->ipu; + unsigned long flags; + u32 reg = 0; + + spin_lock_irqsave(&ipu->lock, flags); + switch (buf_num) { + case 0: + reg = ipu_cm_read(ipu, IPU_CHA_BUF0_RDY(channel->num)); + break; + case 1: + reg = ipu_cm_read(ipu, IPU_CHA_BUF1_RDY(channel->num)); + break; + case 2: + reg = ipu_cm_read(ipu, IPU_CHA_BUF2_RDY(channel->num)); + break; + } + spin_unlock_irqrestore(&ipu->lock, flags); + + return ((reg & idma_mask(channel->num)) != 0); +} +EXPORT_SYMBOL_GPL(ipu_idmac_buffer_is_ready); + void ipu_idmac_select_buffer(struct ipuv3_channel *channel, u32 buf_num) { struct ipu_soc *ipu = channel->ipu; |