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| author | Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com> | 2026-05-26 11:47:00 +0300 |
|---|---|---|
| committer | Vinod Koul <vkoul@kernel.org> | 2026-06-04 20:58:32 +0530 |
| commit | 1dddc864dfa844efaf36345eb58b121b2cdffa5f (patch) | |
| tree | d2c1711f40857fb21bdebabf41739ff900c709e4 /drivers | |
| parent | 7a94c109a5def4f0f25705a82ed5870f794ff4ed (diff) | |
| download | linux-1dddc864dfa844efaf36345eb58b121b2cdffa5f.tar.gz linux-1dddc864dfa844efaf36345eb58b121b2cdffa5f.zip | |
dmaengine: sh: rz-dmac: Add helper to check if the channel is paused
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>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/dma/sh/rz-dmac.c | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/dma/sh/rz-dmac.c b/drivers/dma/sh/rz-dmac.c index 76bac11c217c..217657513fa7 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 *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; } |