From: Sowjanya Komatineni <skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> To: Dmitry Osipenko <digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>, thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org, jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, frankc-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org, hverkuil-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org, sakari.ailus-X3B1VOXEql0@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, helen.koike-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org Cc: sboyd-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org, linux-media-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Subject: Re: [RFC PATCH v3 16/18] gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_wait Date: Fri, 17 Jul 2020 08:41:58 -0700 [thread overview] Message-ID: <b125deab-7900-6266-d405-4d7f029089b4@nvidia.com> (raw) In-Reply-To: <080b30c7-1dce-dd2f-dd96-40f6e25da4d6-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> On 7/17/20 8:01 AM, Dmitry Osipenko wrote: > 17.07.2020 07:46, Sowjanya Komatineni пишет: > ... >> Looks like sequence posted in TRM need to be updated clearly for proper >> MIPI CAL start and wait. >> >> Correct steps should be like below >> >> 1. Set up CSI registers for use case such as number of lanes, virtual >> channel, etc. >> 2. Initialize and power up CSI CIL interface >> 3. Program MIPI CAL bias pads, cal configs, cal control registers and >> enable calibration start >> 4. Power up camera through the I2C interface and start sensor streaming >> through the I2C >> >> Note: All sensors might not leave pads in LP-11 state as sensor may be >> power down when not in use. >> >> So start streaming prior to checking for calibration done status as >> LP-11 -> HS transition happens during sensor stream and calibration >> logic can apply results to pads and update done status, >> >> 5. Wait for done signal from calibration logic >> >> 6. perform frame capture thru VI >> 7. Frame done, CSI goes back to stop state, LP11 >> >> Will work internally to correct sequence in TRM ... > Will be nice to have an updated TRM, thank you! > > Also, what about the auto-calibration? Isn't it needed to be enabled for > CSI? STARTCAL does one time calibration and with AUTOCAL calibration will be triggered periodically. For pads PULLUP/PULLDN/TERM impedance calibration, we only need one-time calibration on pads power up. We always use one time pads calibration for CSI. > >> In mipi driver will update as below to have mipi clk enabled till >> calibration status check is done. >> >> Always tegra_mipi_wait() followes tegra_mipi_calibrate() in both DSI and >> CSI. So below sequence should work good. >> >> tegra_mipi_calibrate() >> >> - clk_enable mipi cal >> - program mipi cal registers (bias pads cfgs, mipi cal ctrl and trigger >> calibration start) >> >> tegra_mipi_wait() >> - read mipi cal status and wait for active and done bits >> - clk_disable mipi cal > > Maybe then it should be better to rename the functions like this: > > tegra_mipi_calibrate() -> tegra_mipi_start_calibration() > tegra_mipi_wait() -> tegra_mipi_finish_calibration(). > > and there also should be tegra_mipi_cancel_calibration(). > > > Example: > > tegra_mipi_start_calibration(); > > ret = v4l2_subdev_call(subdev, video, s_stream, on); > if (ret < 0) { > tegra_mipi_cancel_calibration(); > goto err; > } > > tegra_mipi_finish_calibration(); > >
WARNING: multiple messages have this Message-ID (diff)
From: Sowjanya Komatineni <skomatineni@nvidia.com> To: Dmitry Osipenko <digetx@gmail.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: <sboyd@kernel.org>, <gregkh@linuxfoundation.org>, <linux-media@vger.kernel.org>, <devicetree@vger.kernel.org>, <linux-tegra@vger.kernel.org>, <linux-kernel@vger.kernel.org>, <linux-i2c@vger.kernel.org> Subject: Re: [RFC PATCH v3 16/18] gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_wait Date: Fri, 17 Jul 2020 08:41:58 -0700 [thread overview] Message-ID: <b125deab-7900-6266-d405-4d7f029089b4@nvidia.com> (raw) In-Reply-To: <080b30c7-1dce-dd2f-dd96-40f6e25da4d6@gmail.com> On 7/17/20 8:01 AM, Dmitry Osipenko wrote: > 17.07.2020 07:46, Sowjanya Komatineni пишет: > ... >> Looks like sequence posted in TRM need to be updated clearly for proper >> MIPI CAL start and wait. >> >> Correct steps should be like below >> >> 1. Set up CSI registers for use case such as number of lanes, virtual >> channel, etc. >> 2. Initialize and power up CSI CIL interface >> 3. Program MIPI CAL bias pads, cal configs, cal control registers and >> enable calibration start >> 4. Power up camera through the I2C interface and start sensor streaming >> through the I2C >> >> Note: All sensors might not leave pads in LP-11 state as sensor may be >> power down when not in use. >> >> So start streaming prior to checking for calibration done status as >> LP-11 -> HS transition happens during sensor stream and calibration >> logic can apply results to pads and update done status, >> >> 5. Wait for done signal from calibration logic >> >> 6. perform frame capture thru VI >> 7. Frame done, CSI goes back to stop state, LP11 >> >> Will work internally to correct sequence in TRM ... > Will be nice to have an updated TRM, thank you! > > Also, what about the auto-calibration? Isn't it needed to be enabled for > CSI? STARTCAL does one time calibration and with AUTOCAL calibration will be triggered periodically. For pads PULLUP/PULLDN/TERM impedance calibration, we only need one-time calibration on pads power up. We always use one time pads calibration for CSI. > >> In mipi driver will update as below to have mipi clk enabled till >> calibration status check is done. >> >> Always tegra_mipi_wait() followes tegra_mipi_calibrate() in both DSI and >> CSI. So below sequence should work good. >> >> tegra_mipi_calibrate() >> >> - clk_enable mipi cal >> - program mipi cal registers (bias pads cfgs, mipi cal ctrl and trigger >> calibration start) >> >> tegra_mipi_wait() >> - read mipi cal status and wait for active and done bits >> - clk_disable mipi cal > > Maybe then it should be better to rename the functions like this: > > tegra_mipi_calibrate() -> tegra_mipi_start_calibration() > tegra_mipi_wait() -> tegra_mipi_finish_calibration(). > > and there also should be tegra_mipi_cancel_calibration(). > > > Example: > > tegra_mipi_start_calibration(); > > ret = v4l2_subdev_call(subdev, video, s_stream, on); > if (ret < 0) { > tegra_mipi_cancel_calibration(); > goto err; > } > > tegra_mipi_finish_calibration(); > >
next prev parent reply other threads:[~2020-07-17 15:41 UTC|newest] Thread overview: 84+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-15 4:20 [RFC PATCH v3 00/18] Support for Tegra video capture from external sensor Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 02/18] arm64: tegra: Add missing clocks and power-domains to Tegra210 VI I2C Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni [not found] ` <1594786855-26506-3-git-send-email-skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 13:25 ` Thierry Reding 2020-07-16 13:25 ` Thierry Reding 2020-07-15 4:20 ` [RFC PATCH v3 04/18] i2c: tegra: Remove NULL pointer check before clk_enable/disable/prepare/unprepare Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-16 20:25 ` Dmitry Osipenko 2020-07-15 4:20 ` [RFC PATCH v3 05/18] i2c: tegra: Fix the error path in tegra_i2c_runtime_resume Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 07/18] i2c: tegra: Avoid tegra_i2c_init_dma() for Tegra210 vi i2c Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 09/18] media: tegra-video: Enable TPG based on kernel config Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 12/18] media: tegra-video: Add support for external sensor capture Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 13/18] media: tegra-video: Add support for selection ioctl ops Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 14/18] gpu: host1x: mipi: Update tegra_mipi_request() to be node based Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni [not found] ` <1594786855-26506-15-git-send-email-skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 20:26 ` Dmitry Osipenko 2020-07-16 20:26 ` Dmitry Osipenko 2020-07-15 4:20 ` [RFC PATCH v3 15/18] gpu: host1x: mipi: Use readl_relaxed_poll_timeout in tegra_mipi_wait Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 16/18] gpu: host1x: mipi: Split tegra_mipi_calibrate and tegra_mipi_wait Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni [not found] ` <1594786855-26506-17-git-send-email-skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 20:38 ` Dmitry Osipenko 2020-07-16 20:38 ` Dmitry Osipenko [not found] ` <a06dec8f-7042-767b-545b-048685a7683d-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2020-07-16 21:09 ` Sowjanya Komatineni 2020-07-16 21:09 ` Sowjanya Komatineni [not found] ` <20d63eca-4b2b-584e-a391-a4fb64a16b40-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 21:18 ` Dmitry Osipenko 2020-07-16 21:18 ` Dmitry Osipenko 2020-07-16 22:49 ` Sowjanya Komatineni 2020-07-16 22:49 ` Sowjanya Komatineni 2020-07-16 23:01 ` Dmitry Osipenko 2020-07-16 23:06 ` Sowjanya Komatineni 2020-07-16 23:06 ` Sowjanya Komatineni [not found] ` <4690e682-8495-2327-87c7-c2f06a7a479d-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 23:09 ` Sowjanya Komatineni 2020-07-16 23:09 ` Sowjanya Komatineni [not found] ` <66812127-38cf-2af3-51c0-50edbe446e73-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 23:47 ` Dmitry Osipenko 2020-07-16 23:47 ` Dmitry Osipenko 2020-07-17 0:16 ` Sowjanya Komatineni 2020-07-17 0:16 ` Sowjanya Komatineni [not found] ` <550f1796-67ca-5856-223d-c68360243954-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-17 4:46 ` Sowjanya Komatineni 2020-07-17 4:46 ` Sowjanya Komatineni 2020-07-17 15:01 ` Dmitry Osipenko [not found] ` <080b30c7-1dce-dd2f-dd96-40f6e25da4d6-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> 2020-07-17 15:41 ` Sowjanya Komatineni [this message] 2020-07-17 15:41 ` Sowjanya Komatineni [not found] ` <b125deab-7900-6266-d405-4d7f029089b4-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-17 20:14 ` Dmitry Osipenko 2020-07-17 20:14 ` Dmitry Osipenko [not found] ` <1594786855-26506-1-git-send-email-skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-15 4:20 ` [RFC PATCH v3 01/18] dt-bindings: i2c: tegra: Document Tegra210 VI I2C clocks and power-domains Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni [not found] ` <1594786855-26506-2-git-send-email-skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 13:25 ` Thierry Reding 2020-07-16 13:25 ` Thierry Reding 2020-07-15 4:20 ` [RFC PATCH v3 03/18] i2c: tegra: Don't mark VI I2C as IRQ safe runtime PM Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 06/18] i2c: tegra: Fix runtime resume to re-init VI I2C Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 08/18] media: tegra-video: Fix channel format alignment Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 10/18] media: tegra-video: Update format lookup to offset based Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 11/18] dt-bindings: tegra: Update VI and CSI bindings with port info Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni [not found] ` <1594786855-26506-12-git-send-email-skomatineni-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-16 19:09 ` Rob Herring 2020-07-16 19:09 ` Rob Herring 2020-07-15 4:20 ` [RFC PATCH v3 17/18] media: tegra-video: Add CSI MIPI pads calibration Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-15 4:20 ` [RFC PATCH v3 18/18] media: tegra-video: Compute settle times based on the clock rate Sowjanya Komatineni 2020-07-15 4:20 ` Sowjanya Komatineni 2020-07-17 10:54 ` [RFC PATCH v3 00/18] Support for Tegra video capture from external sensor Hans Verkuil 2020-07-17 10:54 ` Hans Verkuil [not found] ` <f03bdb89-df7c-e9e8-1512-d57e5d2332bf-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org> 2020-07-17 16:34 ` Sowjanya Komatineni 2020-07-17 16:34 ` Sowjanya Komatineni 2020-07-17 17:08 ` Hans Verkuil 2020-07-17 17:23 ` Sowjanya Komatineni 2020-07-17 17:23 ` Sowjanya Komatineni [not found] ` <5694f74a-be8e-7a95-1739-0a5fc9820597-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-17 17:38 ` Sowjanya Komatineni 2020-07-17 17:38 ` Sowjanya Komatineni [not found] ` <9aa8be89-d181-2dca-36ca-ea118bd5b0a7-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-17 17:48 ` Sowjanya Komatineni 2020-07-17 17:48 ` Sowjanya Komatineni [not found] ` <2f9ecba7-3d05-8a68-f2ad-546470780642-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org> 2020-07-20 4:41 ` Sowjanya Komatineni 2020-07-20 4:41 ` 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=b125deab-7900-6266-d405-4d7f029089b4@nvidia.com \ --to=skomatineni-ddmlm1+adcrqt0dzr+alfa@public.gmane.org \ --cc=devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=digetx-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \ --cc=frankc-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org \ --cc=gregkh-hQyY1W1yCW8ekmWlsbkhG0B+6BGkLq7r@public.gmane.org \ --cc=helen.koike-ZGY8ohtN/8qB+jHODAdFcQ@public.gmane.org \ --cc=hverkuil-qWit8jRvyhVmR6Xm/wNWPw@public.gmane.org \ --cc=jonathanh-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org \ --cc=linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=linux-media-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=linux-tegra-u79uwXL29TY76Z2rM5mHXA@public.gmane.org \ --cc=robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \ --cc=sakari.ailus-X3B1VOXEql0@public.gmane.org \ --cc=sboyd-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org \ --cc=thierry.reding-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org \ /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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.