Hi Niklas,
Thank you for the patch.
On Friday, 14 December 2018 08:18:22 EET Niklas Söderlund wrote:
> In preparation of suspend/resume support cache the chsel value when we
> write it to the register so it can be restored on resume if needed.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+rene...@ragnatech.se>
> ---
> drivers/media/platform/rcar-vin/rcar-dma.c | 2 ++
> drivers/media/platform/rcar-vin/rcar-vin.h | 2 ++
> 2 files changed, 4 insertions(+)
>
> diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c
> b/drivers/media/platform/rcar-vin/rcar-dma.c index
> beb9248992a48a74..64f7636f94d6a0a3 100644
> --- a/drivers/media/platform/rcar-vin/rcar-dma.c
> +++ b/drivers/media/platform/rcar-vin/rcar-dma.c
> @@ -1336,6 +1336,8 @@ int rvin_set_channel_routing(struct rvin_dev *vin, u8
> chsel)
>
> vin_dbg(vin, "Set IFMD 0x%x\n", ifmd);
>
> + vin->chsel = chsel;
> +
Would it be useful to add a
if (vin->chsel == chsel)
return 0;
at the beginning of the function, or is that impossible ?
> /* Restore VNMC. */
> rvin_write(vin, vnmc, VNMC_REG);
>
> diff --git a/drivers/media/platform/rcar-vin/rcar-vin.h
> b/drivers/media/platform/rcar-vin/rcar-vin.h index
> 0b13b34d03e3dce4..d21fc991b7a9da36 100644
> --- a/drivers/media/platform/rcar-vin/rcar-vin.h
> +++ b/drivers/media/platform/rcar-vin/rcar-vin.h
> @@ -170,6 +170,7 @@ struct rvin_info {
> * @state: keeps track of operation state
> *
> * @is_csi: flag to mark the VIN as using a CSI-2 subdevice
> + * @chsel Cached value of the current CSI-2 channel selection
Nitpicking, the documentation for other fields don't start with a capital
letter.
Reviewed-by: Laurent Pinchart <laurent.pinch...@ideasonboard.com>
> *
> * @mbus_code: media bus format code
> * @format: active V4L2 pixel format
> @@ -207,6 +208,7 @@ struct rvin_dev {
> enum rvin_dma_state state;
>
> bool is_csi;
> + unsigned int chsel;
>
> u32 mbus_code;
> struct v4l2_pix_format format;
--
Regards,
Laurent Pinchart
