From: Jakob Berg Jespersen <dev@berg.pm>
To: fernandorimoli11@gmail.com
Cc: dan.scally@ideasonboard.com, sakari.ailus@linux.intel.com,
naeemarsalan@gmail.com, mchehab@kernel.org,
linux-media@vger.kernel.org, linux-kernel@vger.kernel.org,
Jakob Berg Jespersen <dev@berg.pm>
Subject: Re: [PATCH v2 3/3] media: i2c: ov5693: Gate the MIPI clock lane for IPU6
Date: Sun, 19 Jul 2026 18:25:16 +0200 [thread overview]
Message-ID: <20260719162516.21384-1-dev@berg.pm> (raw)
In-Reply-To: <20260717132021.18034-4-fernandorimoli11@gmail.com>
On Fri, 17 Jul 2026, Fernando Rimoli wrote:
> The ov5693 never programs MIPI_CTRL00 (0x4800), leaving it at its 0x00
> power-on default (free-running MIPI clock). The IPU3 CSI-2 receiver
> tolerates this, but the IPU6 receiver [...] fails to lock onto the
> link, so the sensor streams but capture times out [...]
Confirmed on the Microsoft Surface Pro 7+ (Tiger Lake IPU6).
Its front ov5693 enumerates as INT33BE, so just patch 3 seems relevant.
With the unpatched driver, only 1/20 cold opens delivered frames,
the rest timed out with zero frames. With this patch applied, 20/20
streamed at ~28-29 fps.
Tested-by: Jakob Berg Jespersen <dev@berg.pm>
(Surface Pro 7+, Fedora 44, kernel 7.0.12-200.fc44.x86_64; libcamera
cam tool.)
next prev parent reply other threads:[~2026-07-19 16:26 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-07-08 21:36 [PATCH] media: ov5693: add OVTI5693 ACPI HID for IPU6 Surface devices Fernando Rimoli
2026-07-09 13:17 ` Dan Scally
2026-07-14 9:32 ` Sakari Ailus
2026-07-17 13:20 ` [PATCH v2 0/3] media: Enable the OV5693 front camera on " Fernando Rimoli
2026-07-17 13:20 ` [PATCH v2 1/3] media: i2c: ov5693: Add OVTI5693 ACPI HID Fernando Rimoli
2026-07-17 13:20 ` [PATCH v2 2/3] media: ipu-bridge: Add OVTI5693 to the list of supported sensors Fernando Rimoli
2026-07-17 13:20 ` [PATCH v2 3/3] media: i2c: ov5693: Gate the MIPI clock lane for IPU6 Fernando Rimoli
2026-07-19 16:25 ` Jakob Berg Jespersen [this message]
2026-07-19 22:42 ` Sakari Ailus
2026-07-20 16:38 ` [PATCH v3 0/4] media: Enable the OV5693 front camera on IPU6 Surface devices Fernando Rimoli
2026-07-20 16:38 ` [PATCH v3 1/4] media: i2c: ov5693: Add OVTI5693 ACPI HID Fernando Rimoli
2026-07-20 16:38 ` [PATCH v3 2/4] media: ipu-bridge: Add OVTI5693 to the list of supported sensors Fernando Rimoli
2026-07-20 21:09 ` Dan Scally
2026-07-20 16:38 ` [PATCH v3 3/4] media: i2c: ov5693: Gate the MIPI clock lane for non-continuous clock Fernando Rimoli
2026-07-20 21:49 ` Dan Scally
2026-07-20 16:38 ` [PATCH v3 4/4] media: ipu-bridge: Request non-continuous clock for ov5693 on IPU6 Fernando Rimoli
2026-07-20 21:56 ` Dan Scally
2026-07-20 23:50 ` Fernando Rimoli
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