From: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
To: Jacopo Mondi <jacopo+renesas@jmondi.org>,
laurent.pinchart+renesas@ideasonboard.com,
niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org
Cc: Mauro Carvalho Chehab <mchehab@kernel.org>,
linux-media@vger.kernel.org, linux-renesas-soc@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH 11/16] media: i2c: max9286: Cache channel amplitude
Date: Thu, 18 Feb 2021 15:39:37 +0000 [thread overview]
Message-ID: <2b62ff38-7c9c-c24f-b7a6-8e3a65d3f669@ideasonboard.com> (raw)
In-Reply-To: <20210216174146.106639-12-jacopo+renesas@jmondi.org>
On 16/02/2021 17:41, Jacopo Mondi wrote:
> Cache the current channel amplitude in a driver variable
> to skip updating it if the new requested value is the same
> as the currently configured one.
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
I like this model better than deciding outside of the call :-)
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
> ---
> drivers/media/i2c/max9286.c | 13 ++++++++++---
> 1 file changed, 10 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/i2c/max9286.c b/drivers/media/i2c/max9286.c
> index 1f14cd817fbf..4afb5ca06448 100644
> --- a/drivers/media/i2c/max9286.c
> +++ b/drivers/media/i2c/max9286.c
> @@ -164,6 +164,7 @@ struct max9286_priv {
> bool mux_open;
>
> u32 init_rev_chan_mv;
> + u32 rev_chan_mv;
>
> struct v4l2_ctrl_handler ctrls;
> struct v4l2_ctrl *pixelrate;
> @@ -340,8 +341,15 @@ static void max9286_configure_i2c(struct max9286_priv *priv, bool localack)
> static void max9286_reverse_channel_setup(struct max9286_priv *priv,
> unsigned int chan_amplitude)
> {
> + u8 chan_config;
> +
> + if (priv->rev_chan_mv == chan_amplitude)
> + return;
> +
> + priv->rev_chan_mv = chan_amplitude;
> +
> /* Reverse channel transmission time: default to 1. */
> - u8 chan_config = MAX9286_REV_TRF(1);
> + chan_config = MAX9286_REV_TRF(1);
>
> /*
> * Reverse channel setup.
> @@ -563,8 +571,7 @@ static int max9286_notify_bound(struct v4l2_async_notifier *notifier,
> * - Disable auto-ack as communication on the control channel are now
> * stable.
> */
> - if (priv->init_rev_chan_mv < 170)
> - max9286_reverse_channel_setup(priv, 170);
> + max9286_reverse_channel_setup(priv, 170);
> max9286_check_config_link(priv, priv->source_mask);
>
> /*
>
next prev parent reply other threads:[~2021-02-18 18:10 UTC|newest]
Thread overview: 65+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-16 17:41 [PATCH 00/16] media: i2c: GMSL reliability improvements Jacopo Mondi
2021-02-16 17:41 ` [PATCH 01/16] media: i2c: rdacm20: Enable noise immunity Jacopo Mondi
2021-02-17 12:55 ` Kieran Bingham
2021-02-22 0:49 ` Laurent Pinchart
2021-02-22 14:59 ` Jacopo Mondi
2021-02-24 20:35 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 02/16] media: i2c: rdacm20: Embedded 'serializer' field Jacopo Mondi
2021-02-17 12:56 ` Kieran Bingham
2021-02-22 0:58 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 03/16] media: i2c: rdacm20: Replace goto with a loop Jacopo Mondi
2021-02-17 13:01 ` Kieran Bingham
2021-02-22 1:05 ` Laurent Pinchart
2021-02-22 15:06 ` Jacopo Mondi
2021-02-24 20:27 ` Laurent Pinchart
2021-02-25 8:56 ` Kieran Bingham
2021-02-16 17:41 ` [PATCH 04/16] media: i2c: rdacm20: Report camera module name Jacopo Mondi
2021-02-17 13:02 ` Kieran Bingham
2021-02-22 1:06 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 05/16] media: i2c: rdacm20: Check return values Jacopo Mondi
2021-02-17 13:08 ` Kieran Bingham
2021-02-22 1:09 ` Laurent Pinchart
2021-02-22 15:08 ` Jacopo Mondi
2021-02-16 17:41 ` [PATCH 06/16] media: i2c: rdacm20: Re-work ov10635 reset Jacopo Mondi
2021-02-17 13:22 ` Kieran Bingham
2021-02-22 1:15 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 07/16] media: i2c: rdacm2x: Fix wake up delay Jacopo Mondi
2021-02-17 8:02 ` Geert Uytterhoeven
2021-02-17 13:33 ` Kieran Bingham
2021-02-22 1:18 ` Laurent Pinchart
2021-02-22 15:11 ` Jacopo Mondi
2021-02-24 20:29 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 08/16] media: i2c: max9286: Adjust parameters indent Jacopo Mondi
2021-02-17 13:36 ` Kieran Bingham
2021-02-22 1:20 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 09/16] media: i2c: rdacm21: Re-work OV10640 initialization Jacopo Mondi
2021-02-17 8:06 ` Geert Uytterhoeven
2021-02-17 13:55 ` Kieran Bingham
2021-02-22 1:27 ` Laurent Pinchart
2021-02-22 15:19 ` Jacopo Mondi
2021-02-24 20:30 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 10/16] media: i2c: max9286: Rename reverse_channel_mv Jacopo Mondi
2021-02-17 8:07 ` Geert Uytterhoeven
2021-02-18 15:06 ` Kieran Bingham
2021-02-22 1:29 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 11/16] media: i2c: max9286: Cache channel amplitude Jacopo Mondi
2021-02-17 8:08 ` Geert Uytterhoeven
2021-02-18 15:39 ` Kieran Bingham [this message]
2021-02-22 1:33 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 12/16] media: i2c: max9286: Define high " Jacopo Mondi
2021-02-18 15:39 ` Kieran Bingham
2021-02-22 1:35 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 13/16] media: i2c: rdacm2x: Implement .init() subdev op Jacopo Mondi
2021-02-17 8:17 ` Geert Uytterhoeven
2021-02-18 16:13 ` Kieran Bingham
2021-02-22 1:52 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 14/16] media: i2c: max9286: Initialize remotes when bound Jacopo Mondi
2021-02-17 8:19 ` Geert Uytterhoeven
2021-02-18 16:00 ` Kieran Bingham
2021-02-22 2:03 ` Laurent Pinchart
2021-02-16 17:41 ` [PATCH 15/16] media: i2c: max9286: Rework comments in .bound() Jacopo Mondi
2021-02-18 16:03 ` Kieran Bingham
2021-02-16 17:41 ` [PATCH 16/16] media: i2c: gmsl: Use 339Kbps I2C bit-rate Jacopo Mondi
2021-02-17 8:19 ` Geert Uytterhoeven
2021-02-18 16:07 ` Kieran Bingham
2021-02-22 2:06 ` Laurent Pinchart
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