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dmaengine: sh: rz-dmac: Add helper to check if the channel is paused

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

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: John Madieu <john.madieu.xa@bp.renesas.com>
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260526084710.3491480-9-claudiu.beznea@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Claudiu Beznea
2026-05-26 11:47:00 +03:00
committed by Vinod Koul
parent 7a94c109a5
commit 1dddc864df
1 changed files with 8 additions and 4 deletions
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12
drivers/dma/sh/rz-dmac.c
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@@ -286,6 +286,13 @@ static bool rz_dmac_chan_is_enabled(struct rz_dmac_chan *channel)
return !!(val & CHSTAT_EN);
}
static bool rz_dmac_chan_is_paused(struct rz_dmac_chan *channel)
{
u32 val = rz_dmac_ch_readl(channel, 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;
}