Hi Jai
On Thu, Jun 27, 2024 at 06:40:00PM GMT, Jai Luthra wrote:
> From: Pratyush Yadav <p.yadav@xxxxxx>
>
> 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@xxxxxx>
> Signed-off-by: Jai Luthra <j-luthra@xxxxxx>
Reviewed-by: Jacopo Mondi <jacopo.mondi@xxxxxxxxxxxxxxxx>
Thanks
j
> ---
> drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c | 4 +++-
> 1 file changed, 3 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
> index bffc8165fd33..361b0ea8e0d9 100644
> --- a/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
> +++ b/drivers/media/platform/ti/j721e-csi2rx/j721e-csi2rx.c
> @@ -1027,6 +1027,7 @@ 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);
> @@ -1035,7 +1036,8 @@ 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);
>
>
> --
> 2.43.0
>
>
