diff mbox series

[v3,04/13] media: ti: j721e-csi2rx: allocate DMA channel based on context index

Message ID 20250417065554.437541-5-r-donadkar@ti.com
State New
Headers show
Series media: cadence,ti: CSI2RX Multistream Support | expand

Commit Message

Rishikesh Donadkar April 17, 2025, 6:55 a.m. UTC 
From: Pratyush Yadav <p.yadav@ti.com>

With multiple contexts, there needs to be a different DMA channel for
each context. Earlier, the DMA channel name was hard coded to "rx0" for
the sake of simplicity. Generate the DMA channel name based on its index
and get the channel corresponding to the context.

Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Signed-off-by: Jai Luthra <j-luthra@ti.com>
Reviewed-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com>
Signed-off-by: Rishikesh Donadkar <r-donadkar@ti.com>
---
 drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)
diff mbox series

Patch

diff --git a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
index d03dc4e56d306..523c890139098 100644
--- a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
+++ b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
@@ -1015,6 +1015,7 @@  static int ti_csi2rx_init_dma(struct ti_csi2rx_ctx *ctx)
 	struct dma_slave_config cfg = {
 		.src_addr_width = DMA_SLAVE_BUSWIDTH_16_BYTES,
 	};
+	char name[32];
 	int ret;
 
 	INIT_LIST_HEAD(&ctx->dma.queue);
@@ -1023,7 +1024,8 @@  static int ti_csi2rx_init_dma(struct ti_csi2rx_ctx *ctx)
 
 	ctx->dma.state = TI_CSI2RX_DMA_STOPPED;
 
-	ctx->dma.chan = dma_request_chan(ctx->csi->dev, "rx0");
+	snprintf(name, sizeof(name), "rx%u", ctx->idx);
+	ctx->dma.chan = dma_request_chan(ctx->csi->dev, name);
 	if (IS_ERR(ctx->dma.chan))
 		return PTR_ERR(ctx->dma.chan);