linux-kernel - Re: [PATCH v3] dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX

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Date:   Mon, 28 Jun 2021 13:38:13 +0300
From:   Péter Ujfalusi <peter.ujfalusi@...il.com>
To:     Pratyush Yadav <p.yadav@...com>
Cc:     Vinod Koul <vkoul@...nel.org>, dmaengine@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3] dmaengine: ti: k3-psil-j721e: Add entry for CSI2RX



On 24/06/2021 21:24, Pratyush Yadav wrote:
> The CSI2RX subsystem uses PSI-L DMA to transfer frames to memory.

If we want to be correct:
The CSI2RX subsystem in j721e is serviced by UDMA via PSI-L to transfer
frames to memory.

If you update the commit message you can also add my:

Acked-by: Peter Ujfalusi <peter.ujflausi@...il.com>

> It can
> have up to 32 threads per instance. J721E has two instances of the
> subsystem, so there are 64 threads total. Add them to the endpoint map.
> 
> Signed-off-by: Pratyush Yadav <p.yadav@...com>
> 
> ---
> This patch has been split off from [0] to facilitate easier merging. I
> have still kept it as v3 to maintain continuity with the previous patches.
> 
> [0] https://patchwork.linuxtv.org/project/linux-media/list/?series=5526&state=%2A&archive=both
> 
> Changes in v3:
> - Update commit message to mention that all 64 threads are being added.
> 
> Changes in v2:
> - Add all 64 threads, instead of having only the one thread being
>   currently used by the driver.
> 
>  drivers/dma/ti/k3-psil-j721e.c | 73 ++++++++++++++++++++++++++++++++++
>  1 file changed, 73 insertions(+)
> 
> diff --git a/drivers/dma/ti/k3-psil-j721e.c b/drivers/dma/ti/k3-psil-j721e.c
> index 7580870ed746..34e3fc565a37 100644
> --- a/drivers/dma/ti/k3-psil-j721e.c
> +++ b/drivers/dma/ti/k3-psil-j721e.c
> @@ -58,6 +58,14 @@
>  		},					\
>  	}
>  
> +#define PSIL_CSI2RX(x)					\
> +	{						\
> +		.thread_id = x,				\
> +		.ep_config = {				\
> +			.ep_type = PSIL_EP_NATIVE,	\
> +		},					\
> +	}
> +
>  /* PSI-L source thread IDs, used for RX (DMA_DEV_TO_MEM) */
>  static struct psil_ep j721e_src_ep_map[] = {
>  	/* SA2UL */
> @@ -138,6 +146,71 @@ static struct psil_ep j721e_src_ep_map[] = {
>  	PSIL_PDMA_XY_PKT(0x4707),
>  	PSIL_PDMA_XY_PKT(0x4708),
>  	PSIL_PDMA_XY_PKT(0x4709),
> +	/* CSI2RX */
> +	PSIL_CSI2RX(0x4940),
> +	PSIL_CSI2RX(0x4941),
> +	PSIL_CSI2RX(0x4942),
> +	PSIL_CSI2RX(0x4943),
> +	PSIL_CSI2RX(0x4944),
> +	PSIL_CSI2RX(0x4945),
> +	PSIL_CSI2RX(0x4946),
> +	PSIL_CSI2RX(0x4947),
> +	PSIL_CSI2RX(0x4948),
> +	PSIL_CSI2RX(0x4949),
> +	PSIL_CSI2RX(0x494a),
> +	PSIL_CSI2RX(0x494b),
> +	PSIL_CSI2RX(0x494c),
> +	PSIL_CSI2RX(0x494d),
> +	PSIL_CSI2RX(0x494e),
> +	PSIL_CSI2RX(0x494f),
> +	PSIL_CSI2RX(0x4950),
> +	PSIL_CSI2RX(0x4951),
> +	PSIL_CSI2RX(0x4952),
> +	PSIL_CSI2RX(0x4953),
> +	PSIL_CSI2RX(0x4954),
> +	PSIL_CSI2RX(0x4955),
> +	PSIL_CSI2RX(0x4956),
> +	PSIL_CSI2RX(0x4957),
> +	PSIL_CSI2RX(0x4958),
> +	PSIL_CSI2RX(0x4959),
> +	PSIL_CSI2RX(0x495a),
> +	PSIL_CSI2RX(0x495b),
> +	PSIL_CSI2RX(0x495c),
> +	PSIL_CSI2RX(0x495d),
> +	PSIL_CSI2RX(0x495e),
> +	PSIL_CSI2RX(0x495f),
> +	PSIL_CSI2RX(0x4960),
> +	PSIL_CSI2RX(0x4961),
> +	PSIL_CSI2RX(0x4962),
> +	PSIL_CSI2RX(0x4963),
> +	PSIL_CSI2RX(0x4964),
> +	PSIL_CSI2RX(0x4965),
> +	PSIL_CSI2RX(0x4966),
> +	PSIL_CSI2RX(0x4967),
> +	PSIL_CSI2RX(0x4968),
> +	PSIL_CSI2RX(0x4969),
> +	PSIL_CSI2RX(0x496a),
> +	PSIL_CSI2RX(0x496b),
> +	PSIL_CSI2RX(0x496c),
> +	PSIL_CSI2RX(0x496d),
> +	PSIL_CSI2RX(0x496e),
> +	PSIL_CSI2RX(0x496f),
> +	PSIL_CSI2RX(0x4970),
> +	PSIL_CSI2RX(0x4971),
> +	PSIL_CSI2RX(0x4972),
> +	PSIL_CSI2RX(0x4973),
> +	PSIL_CSI2RX(0x4974),
> +	PSIL_CSI2RX(0x4975),
> +	PSIL_CSI2RX(0x4976),
> +	PSIL_CSI2RX(0x4977),
> +	PSIL_CSI2RX(0x4978),
> +	PSIL_CSI2RX(0x4979),
> +	PSIL_CSI2RX(0x497a),
> +	PSIL_CSI2RX(0x497b),
> +	PSIL_CSI2RX(0x497c),
> +	PSIL_CSI2RX(0x497d),
> +	PSIL_CSI2RX(0x497e),
> +	PSIL_CSI2RX(0x497f),
>  	/* CPSW9 */
>  	PSIL_ETHERNET(0x4a00),
>  	/* CPSW0 */
> 

-- 
Péter