linux-kernel - [PATCH v3 0/2] media: i2c: imx412: power on timing adjust

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Message-Id: <20260119-imx412-v3-0-8b46929af773@oss.qualcomm.com>
Date: Mon, 19 Jan 2026 18:15:00 +0800
From: Wenmeng Liu <wenmeng.liu@....qualcomm.com>
To: Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Wenmeng Liu <wenmeng.liu@....qualcomm.com>
Subject: [PATCH v3 0/2] media: i2c: imx412: power on timing adjust

This series of patches mainly addresses two issues:
1. The potential inconsistency in the sensor driver's timing between the
first and second power-on.
If the reset GPIO happens to default to the deasserted state at the very
first power-up, the previous sequence could let the sensor run before
supplies/clock are fully stable, while subsequent power cycles would
differ because the driver explicitly toggles reset. This results in
inconsistent power-on sequences between the first and later power-ons.
2. The Arducam IMX577 sensor requires a longer reset time.

Changes in v3:
- Fix power on timing. -- Bryan.
- Add reset delay time for Arducam Imx577.
- Link to v2: https://lore.kernel.org/all/20260109044913.3310-1-wenmeng.liu@oss.qualcomm.com/

Changes in v2:
- Move the 7.4–8 ms delay before mode-register programming to satisfy T7 (NVM read).
- Link to v1: https://lore.kernel.org/all/20251222-imx412-v1-1-51c7e724b376@oss.qualcomm.com/

---
Wenmeng Liu (2):
      media: i2c: imx412: fix sensor power-on timing
      media: i2c: imx412: Extend the power-on waiting time

 drivers/media/i2c/imx412.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
base-commit: 46fe65a2c28ecf5df1a7475aba1f08ccf4c0ac1b
change-id: 20260119-imx412-d6710b9fd3c6

Best regards,
-- 
Wenmeng <wenmeng.liu@....qualcomm.com>