linux-kernel - [PATCH v8 0/2] MT9M114 driver bugfix and improvements

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Message-Id: <20250714075927.511610-1-mathis.foerst@mt.com>
Date: Mon, 14 Jul 2025 09:59:25 +0200
From: Mathis Foerst <mathis.foerst@...com>
To: linux-kernel@...r.kernel.org
Cc: Mathis Foerst <mathis.foerst@...com>,
	Sakari Ailus <sakari.ailus@...ux.intel.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	linux-media@...r.kernel.org,
	manuel.traut@...com,
	mathis.foerst@...hlke.com
Subject: [PATCH v8 0/2] MT9M114 driver bugfix and improvements

Hi,

this patch series contains the following bugfix and improvements
for the MT9M114 camera driver:

Changelog:

v7 -> v8:
- Add missing braces in 1.
- Fix formatting issues as suggested in review.

v6 -> v7:
- Remove already picked patches 1, 2, 3 and 6.
- Remove patch 4 as suggested in review.
- Fix formatting issues
- Return -EBUSY from mt9m114_pa_set_selection if the cropping size changes
  while in streaming state.

v5 -> v6:
- Add 'Reviewed-By:' tags. Sorry for forgetting this in the previous versions

v4 -> v5:
- Apply reformatings and small refactorings as suggested in review comments
- Split PATCH 4 into two parts: One for applying HFLIP / VFLIP while 
  streaming, one for applying set_selection while streaming.
- Add condition to apply set_selection immediately only if the size of the
  cropping rectangle does not change in PATCH 5
- Use device_property_read_u32 instead of of_property_read_u32 in PATCH 7

v3 -> v4:
- Rename DT binding from "onnn,slew-rate" to "slew-rate" in PATCH 1 and 6 as
  requested in the review comment.

v2 -> v3:
- Dropped PATCH 2 ("media: mt9m114: Add get_mbus_config").
  Based on the comments, this issure won't be fixed in the MT9M114
  driver but in "imx-media-csi.c" in a separate patch.
- Renumbered patches accordingly.
- Fix the incomplete renaming of the DT property from 'pad-slew-rate'
  to 'onnn,slew-rate' in PATCH 1 and 6.
- Fix checkpatch formatting suggestions in PATCH 2 and 6.

v1 -> v2:
- Fix the subjects of the patches
- Dropped PATCH 1 ("Add bypass-pll DT-binding") as it can be automatically
  detected if the PLL should be bypassed.
- Renumbered patches accordingly
- Switch to uint32, add default value and clarify documentation in PATCH 1
- Add 'Fixes' and 'Cc' tags as suggested in PATCH 6

Link to v1 discussion:
https://lore.kernel.org/linux-media/20250226153929.274562-1-mathis.foerst@mt.com/
Link to v2 discussion:
https://lore.kernel.org/linux-media/20250304103647.34235-1-mathis.foerst@mt.com/
Link to v3 discussion:
https://lore.kernel.org/linux-media/20250305101453.708270-1-mathis.foerst@mt.com/
Link to v4 discussion:
https://lore.kernel.org/linux-media/20250307093140.370061-1-mathis.foerst@mt.com/

Bugfixes:
- Fix a deadlock when using the V4L2 pad-ops get/set_frame_interval

New Features:
- Bypass the internal PLL if EXTCLK matches the configured link_frequency
- Make the slew-rate of the output pads configurable via DT
- Allow to change the cropping configuration while the sensor is in streaming 
  state

Thanks,
Mathis

Mathis Foerst (2):
  media: mt9m114: Allow set_selection while streaming
  media: mt9m114: Set pad-slew-rate

 drivers/media/i2c/mt9m114.c | 69 ++++++++++++++++++++++++++++---------
 1 file changed, 53 insertions(+), 16 deletions(-)


base-commit: a8598c7de1bcd94461ca54c972efa9b4ea501fb9
-- 
2.34.1