From: Dmitry Osipenko <digetx@gmail.com>
To: Sowjanya Komatineni <skomatineni@nvidia.com>,
thierry.reding@gmail.com, jonathanh@nvidia.com,
frankc@nvidia.com, hverkuil@xs4all.nl, sakari.ailus@iki.fi,
robh+dt@kernel.org, helen.koike@collabora.com
Cc: gregkh@linuxfoundation.org, linux-media@vger.kernel.org,
devicetree@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v7 09/10] media: tegra-video: Add CSI MIPI pads calibration
Date: Sat, 1 Aug 2020 04:04:38 +0300 [thread overview]
Message-ID: <af5506d4-52a4-8693-b95b-d1e0a9a53e79@gmail.com> (raw)
In-Reply-To: <1596231144-12554-10-git-send-email-skomatineni@nvidia.com>
01.08.2020 00:32, Sowjanya Komatineni пишет:
> CSI MIPI pads need to be enabled and calibrated for capturing from
> the external sensor or transmitter.
>
> MIPI CAL unit calibrates MIPI pads pull-up, pull-down and termination
> impedances. Calibration is done by co-work of MIPI BIAS pad and MIPI
> CAL control unit.
>
> Triggering calibration start can happen any time after MIPI pads are
> enabled but calibration results will be latched and applied to MIPI
> pads by MIPI CAL unit only when the link is in LP11 state and then
> calibration status register gets updated.
>
> This patch enables CSI MIPI pads and calibrates them during streaming.
>
> Tegra CSI receiver is able to catch the very first clock transition.
> So, CSI receiver is always enabled prior to sensor streaming and
> trigger of calibration start is done during CSI subdev streaming and
> status of calibration is verified after sensor stream on.
>
> Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
> ---
> drivers/staging/media/tegra-video/TODO | 1 -
> drivers/staging/media/tegra-video/csi.c | 61 +++++++++++++++++++++++++++++++--
> drivers/staging/media/tegra-video/csi.h | 2 ++
> drivers/staging/media/tegra-video/vi.c | 28 ++++++++++++---
> 4 files changed, 84 insertions(+), 8 deletions(-)
Reviewed-by: Dmitry Osipenko <digetx@gmail.com>
next prev parent reply other threads:[~2020-08-01 1:04 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-07-31 21:32 [PATCH v7 00/10] Support for Tegra video capture from external sensor Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 01/10] media: tegra-video: Fix channel format alignment Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 02/10] media: tegra-video: Enable TPG based on kernel config Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 03/10] media: tegra-video: Update format lookup to offset based Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 04/10] dt-bindings: tegra: Update VI and CSI bindings with port info Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 05/10] media: tegra-video: Separate CSI stream enable and disable implementations Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 06/10] media: tegra-video: Add support for external sensor capture Sowjanya Komatineni
2020-08-01 0:59 ` Dmitry Osipenko
2020-07-31 21:32 ` [PATCH v7 07/10] media: tegra-video: Add support for selection ioctl ops Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 08/10] gpu: host1x: mipi: Keep MIPI clock enabled till calibration is done Sowjanya Komatineni
2020-07-31 21:32 ` [PATCH v7 09/10] media: tegra-video: Add CSI MIPI pads calibration Sowjanya Komatineni
2020-08-01 1:04 ` Dmitry Osipenko [this message]
2020-07-31 21:32 ` [PATCH v7 10/10] media: tegra-video: Compute settle times based on the clock rate Sowjanya Komatineni
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=af5506d4-52a4-8693-b95b-d1e0a9a53e79@gmail.com \
--to=digetx@gmail.com \
--cc=devicetree@vger.kernel.org \
--cc=frankc@nvidia.com \
--cc=gregkh@linuxfoundation.org \
--cc=helen.koike@collabora.com \
--cc=hverkuil@xs4all.nl \
--cc=jonathanh@nvidia.com \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-media@vger.kernel.org \
--cc=linux-tegra@vger.kernel.org \
--cc=robh+dt@kernel.org \
--cc=sakari.ailus@iki.fi \
--cc=skomatineni@nvidia.com \
--cc=thierry.reding@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).