[PATCH v4 09/17] dmaengine: sh: rz-dmac: Add helper to check if the channel is paused

Claudiu
2026-04-11T11:43:24Z

Add a helper to check if the channel is paused. This will be reused in
subsequent patches.

Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---

Changes in v4:
- none

Changes in v3:
- none, this patch is new

drivers/dma/sh/rz-dmac.c | 12 ++++++++----
1 file changed, 8 insertions(+), 4 deletions(-)

diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c
index 1a3c33d28c6c..f35ff5739718 100644
--- a/drivers/dma/sh/rz-dmac.c
+++ b/drivers/dma/sh/rz-dmac.c
@@ -286,6 +286,13 @@ static bool rz_dmac_chan_is_enabled(struct rz_dmac_chan *chan)
return !!(val & CHSTAT_EN);
}

+static bool rz_dmac_chan_is_paused(struct rz_dmac_chan *chan)
+{
+ u32 val = rz_dmac_ch_readl(chan, CHSTAT, 1);
+
+ return !!(val & CHSTAT_SUS);
+}
+
static void rz_dmac_enable_hw(struct rz_dmac_chan *channel)
{
struct dma_chan *chan = &channel->vc.chan;
@@ -822,12 +829,9 @@ static enum dma_status rz_dmac_tx_status(struct dma_chan *chan,
return status;

scoped_guard(spinlock_irqsave, &channel->vc.lock) {
- u32 val;
-
residue = rz_dmac_chan_get_residue(channel, cookie);

- val = rz_dmac_ch_readl(channel, CHSTAT, 1);
- if (val & CHSTAT_SUS)
+ if (rz_dmac_chan_is_paused(channel))
status = DMA_PAUSED;
}

--
2.43.0