[PATCH v2] ASoC: spacemit: fix RX DMA params not set when TX is running

[Troy Mitchell <troy.mitchell@linux.spacemit.com>]

When TX is already running (SSCR_SSE is set), the hw_params callback
returns early before setting up DMA parameters for the RX stream. This
prevents the capture path from configuring its DMA data properly.

Move the SSCR_SSE check after DMA parameter setup and format
constraints, so both TX and RX streams get their DMA configuration
regardless of whether the hardware is already enabled. The early return
now only skips the register writes that would disrupt an active stream.

Fixes: fce217449075 ("ASoC: spacemit: add i2s support for K1 SoC")
Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
---
Changes in v2:
- Combine two consecutive SSCR reads into one
- Fix Fixes tag SHA1 to match the upstream commit
- Split from the original 7-patch series into a standalone fix
Link: https://lore.kernel.org/all/20260429-k3-i2s-v1-1-2fe99db11ecb@linux.spacemit.com/
---
 sound/soc/spacemit/k1_i2s.c | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/sound/soc/spacemit/k1_i2s.c b/sound/soc/spacemit/k1_i2s.c
index 1cb99f1abc7c..dccf6dcb72b1 100644
--- a/sound/soc/spacemit/k1_i2s.c
+++ b/sound/soc/spacemit/k1_i2s.c
@@ -117,10 +117,6 @@ static int spacemit_i2s_hw_params(struct snd_pcm_substream *substream,
 	u32 val;
 	int ret;
 
-	val = readl(i2s->base + SSCR);
-	if (val & SSCR_SSE)
-		return 0;
-
 	dma_data = &i2s->playback_dma_data;
 
 	if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
@@ -181,6 +177,9 @@ static int spacemit_i2s_hw_params(struct snd_pcm_substream *substream,
 	}
 
 	val = readl(i2s->base + SSCR);
+	if (val & SSCR_SSE)
+		return 0;
+
 	val &= ~SSCR_DW_32BYTE;
 	val |= data_width;
 	writel(val, i2s->base + SSCR);

---
base-commit: c7275b05bc428c7373d97aa2da02d3a7fa6b9f66
change-id: 20260429-k1-i2s-fix-de60c4611c14

Best regards,
--  
Troy Mitchell <troy.mitchell@linux.spacemit.com>


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