From: Sakari Ailus <sakari.ailus@linux.intel.com>
To: Michael Riesch <michael.riesch@wolfvision.net>
Cc: Dave Stevenson <dave.stevenson@raspberrypi.com>,
Mauro Carvalho Chehab <mchehab@kernel.org>,
Michael Riesch via B4 Relay
<devnull+michael.riesch.wolfvision.net@kernel.org>,
linux-kernel@vger.kernel.org,
Matthias Fend <Matthias.Fend@wolfvision.net>,
libcamera-devel@lists.libcamera.org, linux-media@vger.kernel.org
Subject: Re: [libcamera-devel] [PATCH RFC 1/4] media: v4l2-ctrls: add lens group status controls for zoom and focus
Date: Wed, 12 Apr 2023 14:50:18 +0300 [thread overview]
Message-ID: <ZDaa+qhoZxZ5ymxL@kekkonen.localdomain> (raw)
In-Reply-To: <3ab7bfc4-aaae-2e39-b420-40ad8d71dda4@wolfvision.net>
Hi Michael,
On Wed, Apr 12, 2023 at 10:00:26AM +0200, Michael Riesch wrote:
> - Different controls: If moving = (V4L2_CID_FOCUS_ABSOLUTE == current),
> then what happens if the application performs a
> V4L2_CID_FOCUS_RELATIVE with -3? current should reach 39,
> V4L2_CID_FOCUS_ABSOLUTE is still at 42, the lens is still moving from
> the application's point of view.
Would there be a reason to implement both of these controls in a single
driver? AFAIU, the relative one should be used if there absolute value
isn't known to the driver.
--
Kind regards,
Sakari Ailus
next prev parent reply other threads:[~2023-04-12 11:50 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-04-06 14:31 [PATCH RFC 0/4] media: v4l2-ctrls: add controls for complex lens controller devices Michael Riesch via B4 Relay
2023-04-06 14:31 ` [PATCH RFC 1/4] media: v4l2-ctrls: add lens group status controls for zoom and focus Michael Riesch via B4 Relay
2023-04-06 15:16 ` [libcamera-devel] " Dave Stevenson
2023-04-11 17:33 ` Michael Riesch
2023-04-11 18:15 ` Dave Stevenson
2023-04-12 8:00 ` Michael Riesch
2023-04-12 11:50 ` Sakari Ailus [this message]
2023-04-12 11:57 ` Michael Riesch
2023-04-12 12:05 ` Sakari Ailus
2023-04-12 13:43 ` Michael Riesch
2023-04-12 14:39 ` Sakari Ailus
2023-04-12 14:57 ` Dave Stevenson
2023-04-12 13:55 ` Dave Stevenson
2023-04-12 15:12 ` Sakari Ailus
2023-04-17 12:38 ` Michael Riesch
2023-04-19 9:01 ` Sakari Ailus
2023-04-19 11:24 ` Michael Riesch
2023-04-19 12:49 ` Dave Stevenson
2023-04-24 19:57 ` Sakari Ailus
2023-04-17 8:29 ` Michael Riesch
2023-04-06 14:31 ` [PATCH RFC 2/4] media: v4l2-ctrls: add lens group speed " Michael Riesch via B4 Relay
2023-04-06 14:31 ` [PATCH RFC 3/4] media: v4l2-ctrls: add lens calibration controls Michael Riesch via B4 Relay
2023-04-06 14:31 ` [PATCH RFC 4/4] media: v4l2-ctrls: add controls for individual zoom lenses Michael Riesch via B4 Relay
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