linux-kernel - [PATCH v2 00/18] media: gmsl: Reliability improvement

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Date:   Mon, 15 Mar 2021 14:14:54 +0100
From:   Jacopo Mondi <jacopo+renesas@...ndi.org>
To:     kieran.bingham+renesas@...asonboard.com,
        laurent.pinchart+renesas@...asonboard.com,
        niklas.soderlund+renesas@...natech.se, geert@...ux-m68k.org
Cc:     Jacopo Mondi <jacopo+renesas@...ndi.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v2 00/18] media: gmsl: Reliability improvement

Hello,
  this series follows
https://patchwork.linuxtv.org/project/linux-media/list/?series=4650

Compared to the previous iteration the most substantial changes are
- max9271: Add a wakeup() function
- max9271: Add a patch to report errors from max9271_write()
- rdacm21: Re-work ov10640 initialization
  Laurent spotted a mis-use of the SPWDN gpio signal. Fixing it an re-applying
  the v1 patch that adds the correct delays to the power-up sequence fixes all
  the ov10640 sporadic initialization errors \o/
  Details in the commit message
- rdacm21: Increase OV490 firmware boot timeout. Details in the commit message.
- media: Propose de-depreaction of subdev init() core operation
- Squash max9286 and rdacm20/21 initialization sequence rework to maintain
  bisectability as suggestd by Kieran and Laurent
- Drop i2c speed adjustment as it seems not to have any impact on reliability

Run more than 300 boot tests on the in-development version of the series.
The previous iteration fixed the failure rate down to 13% from the 25% of the
current mainline version.

This new iteration on which I run 80 boot tests gave me a single failure when
tested with RDACM21 and R8A77970 Eagle board \o/

Thanks
   j

Jacopo Mondi (18):
  media: i2c: rdamc21: Fix warning on u8 cast
  media: i2c: rdacm20: Enable noise immunity
  media: i2c: rdacm20: Embedded 'serializer' field
  media: i2c: rdacm20: Replace goto with a loop
  media: i2c: rdacm20: Report camera module name
  media: i2c: max9271: Check max9271_write() return
  media: i2c: rdacm20: Check return values
  media: i2c: rdacm20: Re-work ov10635 reset
  media: i2c: max9271: Introduce wake_up() function
  media: i2c: max9286: Adjust parameters indent
  media: i2c: rdacm21: Fix OV10640 powerdown
  media: i2c: rdacm21: Give more time to OV490 to boot
  media: i2c: max9286: Rename reverse_channel_mv
  media: i2c: max9286: Cache channel amplitude
  media: i2c: max9286: Define high channel amplitude
  media: v4l2-subdev: De-deprecate init() subdev op
  media: gmsl: Reimplement initialization sequence
  media: i2c: max9286: Rework comments in .bound()

 drivers/media/i2c/max9271.c |  37 +++++++--
 drivers/media/i2c/max9271.h |   9 ++
 drivers/media/i2c/max9286.c |  61 ++++++++------
 drivers/media/i2c/rdacm20.c | 160 ++++++++++++++++++++----------------
 drivers/media/i2c/rdacm21.c |  74 ++++++++++-------
 include/media/v4l2-subdev.h |  15 +++-
 6 files changed, 223 insertions(+), 133 deletions(-)

--
2.30.0