From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: Jacopo Mondi <jacopo+renesas@jmondi.org>
Cc: kieran.bingham+renesas@ideasonboard.com,
niklas.soderlund+renesas@ragnatech.se, geert@linux-m68k.org,
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 v2 12/18] media: i2c: rdacm21: Give more time to OV490 to boot
Date: Mon, 15 Mar 2021 23:52:53 +0200 [thread overview]
Message-ID: <YE/XNaSLw2Gq+llE@pendragon.ideasonboard.com> (raw)
In-Reply-To: <20210315131512.133720-13-jacopo+renesas@jmondi.org>
Hi Jacopo,
Thank you for the patch.
On Mon, Mar 15, 2021 at 02:15:06PM +0100, Jacopo Mondi wrote:
> It has been observed through repeated testing (250 boots) that in the
> 10% of the cases the RDACM21 initialization sequence errors out due a
> timeout waiting for the OV490 firmware to complete its boot phase.
>
> Albeit being the current timeout relatively large (300-600 milliseconds),
"Even if the current timeout is already relatively large" ?
> doubling it reduces the sporadic error rate down to 1 over an 80 boot
> sequences test run.
>
> The firmware boot delay is unfortunately not characterized in the camera
> module manual.
>
> Fixes: a59f853b3b4b ("media: i2c: Add driver for RDACM21 camera module")
> Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
> ---
> drivers/media/i2c/rdacm21.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/media/i2c/rdacm21.c b/drivers/media/i2c/rdacm21.c
> index 50a9b0d8255d..07cf077d8efd 100644
> --- a/drivers/media/i2c/rdacm21.c
> +++ b/drivers/media/i2c/rdacm21.c
> @@ -53,7 +53,7 @@
> #define OV490_PID 0x8080300a
> #define OV490_VER 0x8080300b
> #define OV490_PID_TIMEOUT 20
> -#define OV490_OUTPUT_EN_TIMEOUT 300
> +#define OV490_OUTPUT_EN_TIMEOUT 600
>
> #define OV490_GPIO0 BIT(0)
> #define OV490_SPWDN0 BIT(0)
--
Regards,
Laurent Pinchart
next prev parent reply other threads:[~2021-03-15 21:54 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-15 13:14 [PATCH v2 00/18] media: gmsl: Reliability improvement Jacopo Mondi
2021-03-15 13:14 ` [PATCH v2 01/18] media: i2c: rdamc21: Fix warning on u8 cast Jacopo Mondi
2021-03-15 15:27 ` Kieran Bingham
2021-03-15 21:35 ` Laurent Pinchart
2021-03-15 13:14 ` [PATCH v2 02/18] media: i2c: rdacm20: Enable noise immunity Jacopo Mondi
2021-03-15 21:37 ` Laurent Pinchart
2021-03-16 12:56 ` Jacopo Mondi
2021-03-16 19:24 ` Laurent Pinchart
2021-03-15 13:14 ` [PATCH v2 03/18] media: i2c: rdacm20: Embedded 'serializer' field Jacopo Mondi
2021-03-15 15:29 ` Kieran Bingham
2021-03-15 13:14 ` [PATCH v2 04/18] media: i2c: rdacm20: Replace goto with a loop Jacopo Mondi
2021-03-15 15:36 ` Kieran Bingham
2021-03-15 13:14 ` [PATCH v2 05/18] media: i2c: rdacm20: Report camera module name Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 06/18] media: i2c: max9271: Check max9271_write() return Jacopo Mondi
2021-03-15 15:46 ` Kieran Bingham
2021-03-15 21:38 ` Laurent Pinchart
2021-03-15 13:15 ` [PATCH v2 07/18] media: i2c: rdacm20: Check return values Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 08/18] media: i2c: rdacm20: Re-work ov10635 reset Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 09/18] media: i2c: max9271: Introduce wake_up() function Jacopo Mondi
2021-03-15 17:14 ` Kieran Bingham
2021-03-15 21:43 ` Laurent Pinchart
2021-03-15 13:15 ` [PATCH v2 10/18] media: i2c: max9286: Adjust parameters indent Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 11/18] media: i2c: rdacm21: Fix OV10640 powerdown Jacopo Mondi
2021-03-15 17:20 ` Kieran Bingham
2021-03-15 21:45 ` Laurent Pinchart
2021-03-15 13:15 ` [PATCH v2 12/18] media: i2c: rdacm21: Give more time to OV490 to boot Jacopo Mondi
2021-03-15 17:22 ` Kieran Bingham
2021-03-17 10:04 ` Jacopo Mondi
2021-03-19 0:29 ` Laurent Pinchart
2021-03-19 14:53 ` Jacopo Mondi
2021-03-15 21:52 ` Laurent Pinchart [this message]
2021-03-15 13:15 ` [PATCH v2 13/18] media: i2c: max9286: Rename reverse_channel_mv Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 14/18] media: i2c: max9286: Cache channel amplitude Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 15/18] media: i2c: max9286: Define high " Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 16/18] media: v4l2-subdev: De-deprecate init() subdev op Jacopo Mondi
2021-03-15 21:56 ` Laurent Pinchart
2021-03-15 13:15 ` [PATCH v2 17/18] media: gmsl: Reimplement initialization sequence Jacopo Mondi
2021-03-15 13:15 ` [PATCH v2 18/18] media: i2c: max9286: Rework comments in .bound() Jacopo Mondi
2021-03-15 17:28 ` Kieran Bingham
2021-03-15 21:57 ` Laurent Pinchart
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