diff mbox series

[3/5] rcar-vin: Cache the CSI-2 channel selection value

Message ID 20201015231408.2399933-4-niklas.soderlund+renesas@ragnatech.se (mailing list archive)
State New, archived
Headers show
Series rcar-vin: Support suspend and resume | expand

Commit Message

Niklas Söderlund Oct. 15, 2020, 11:14 p.m. UTC 
In preparation of suspend/resume support cache the chsel value when
written to the register so it can be restored on resume if needed.

Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/media/platform/rcar-vin/rcar-dma.c | 2 ++
 drivers/media/platform/rcar-vin/rcar-vin.h | 2 ++
 2 files changed, 4 insertions(+)

Comments

Jacopo Mondi Oct. 16, 2020, 3:57 p.m. UTC | #1 
Hi Niklas,

On Fri, Oct 16, 2020 at 01:14:06AM +0200, Niklas Söderlund wrote:
> In preparation of suspend/resume support cache the chsel value when
> written to the register so it can be restored on resume if needed.
>
> Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
>  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 680160f9f851d8a3..f65deac4c2dbed54 100644
> --- a/drivers/media/platform/rcar-vin/rcar-dma.c
> +++ b/drivers/media/platform/rcar-vin/rcar-dma.c
> @@ -1456,6 +1456,8 @@ int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel)
>
>  	vin_dbg(vin, "Set IFMD 0x%x\n", ifmd);
>
> +	vin->chsel = chsel;
> +
>  	/* 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 8396e0e45478fe4f..2fef23470e3ddfe3 100644
> --- a/drivers/media/platform/rcar-vin/rcar-vin.h
> +++ b/drivers/media/platform/rcar-vin/rcar-vin.h
> @@ -189,6 +189,7 @@ 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
>   *
>   * @mbus_code:		media bus format code
>   * @format:		active V4L2 pixel format
> @@ -232,6 +233,7 @@ struct rvin_dev {
>  	enum rvin_dma_state state;
>
>  	bool is_csi;
> +	unsigned int chsel;

Could be a u8, I'm not sure we gain anything though

Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>

Thanks
  j
>
>  	u32 mbus_code;
>  	struct v4l2_pix_format format;
> --
> 2.28.0
>
diff mbox series

Patch

diff --git a/drivers/media/platform/rcar-vin/rcar-dma.c b/drivers/media/platform/rcar-vin/rcar-dma.c
index 680160f9f851d8a3..f65deac4c2dbed54 100644
--- a/drivers/media/platform/rcar-vin/rcar-dma.c
+++ b/drivers/media/platform/rcar-vin/rcar-dma.c
@@ -1456,6 +1456,8 @@  int rvin_set_channel_routing(struct rvin_dev *vin, u8 chsel)
 
 	vin_dbg(vin, "Set IFMD 0x%x\n", ifmd);
 
+	vin->chsel = chsel;
+
 	/* 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 8396e0e45478fe4f..2fef23470e3ddfe3 100644
--- a/drivers/media/platform/rcar-vin/rcar-vin.h
+++ b/drivers/media/platform/rcar-vin/rcar-vin.h
@@ -189,6 +189,7 @@  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
  *
  * @mbus_code:		media bus format code
  * @format:		active V4L2 pixel format
@@ -232,6 +233,7 @@  struct rvin_dev {
 	enum rvin_dma_state state;
 
 	bool is_csi;
+	unsigned int chsel;
 
 	u32 mbus_code;
 	struct v4l2_pix_format format;