linux-kernel - [PATCH v5 00/14] media: mt9m114: Changes to make it work with atomisp devices

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Message-Id: <20251230-mt9m114-atomisp-v5-0-763539e76094@oss.qualcomm.com>
Date: Tue, 30 Dec 2025 18:02:57 +0100
From: Hans de Goede <johannes.goede@....qualcomm.com>
To: Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>
Cc: linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Hans de Goede <johannes.goede@....qualcomm.com>
Subject: [PATCH v5 00/14] media: mt9m114: Changes to make it work with
 atomisp devices

Hi All,

Here is v5 of my series to make the "mainline" mt9m114 driver work
on devices with an atomisp CSI2 receiver / ISP. This has been tested on
an Asus T100TA.

All patches have a Reviewed-by from Laurent now, so I believe that this
is ready for merging now.

Changes in v5:
- Move PLL-setup comment to mt9m114.c and squash it into
  "[PATCH v5 02/14] media: mt9m114: Use aptina-PLL helper to get PLL values"
- Use sensor->pll.ext_clock instead of calling clk_get_rate()
- Drop "and identify it " from comment in probe()
- Link to v4: https://lore.kernel.org/r/20251224-mt9m114-atomisp-v4-0-60b25da7a1bc@oss.qualcomm.com

Changes in v4:
- Drop "media: mt9m114: Add support for clock-frequency property" this is
  not longer necessary with the new vl2_sensor_clk_get() helper
- Add "media: aptina-pll: Add comment documenting the PLL chain"
- Rework "media: mt9m114: Drop start-, stop-streaming sequence from
  initialize" moving mt9m114_initialize() to mt9m114_start_streaming() and
  dropping the config_change_pending flag
- Address comments from Laurent about commit message and comment wording
- Some small code tweaks based on suggestions from Laurent

Changes in v3:
- Document that using 768Mhz for out_clock_max does not work
- Improve "media: mt9m114: Put sensor in reset on power down" commit message
- Drop setting of the MT9M114_CAM_OUTPUT_FORMAT_BT656_CROP_SCALE_DISABLE bit
- Split "media: mt9m114: Fix scaler bypass mode" into multiple patches,
  addressing various review comments as part of this

Changes in v2:
- Rebase on top of sailus/media_tree.git/fixes which now has 4 of
  the patches from Mathis': "MT9M114 driver bugfix and improvements"
  series, this avoids most of the conlicts between the 2 series
- Add Laurent's Reviewed-by to some of the patches
- Add select VIDEO_APTINA_PLL to Kconfig
- Use correct aptina_pll_limits
- After setting reset high wait 20 clk cycles before disabling
  the clk and regulators
- When bypassing the scalar make ifp_get_selection() / ifp_set_selection()
  fill sel->r with a rectangle of (0,0)/wxh and return 0 instead of
  returning -EINVAL

Regards,

Hans

---
Hans de Goede (14):
      media: aptina-pll: Debug log p1 min and max values
      media: mt9m114: Use aptina-PLL helper to get PLL values
      media: mt9m114: Lower minimum vblank value
      media: mt9m114: Fix default hblank and vblank values
      media: mt9m114: Tweak default hblank and vblank for more accurate fps
      media: mt9m114: Avoid a reset low spike during probe()
      media: mt9m114: Put sensor in reset on power down
      media: mt9m114: Add and use mt9m114_ifp_get_border() helper function
      media: mt9m114: Adjust IFP selections and source format when source format changes to/from RAW10
      media: mt9m114: Update source pad selection and format when sink pad format changes
      media: mt9m114: Don't allow changing the IFP crop/compose selections when bypassing the scaler
      media: mt9m114: Drop start-, stop-streaming sequence from initialize
      media: mt9m114: Return -EPROBE_DEFER if no endpoint is found
      media: mt9m114: Add ACPI enumeration support

 drivers/media/i2c/Kconfig      |   1 +
 drivers/media/i2c/aptina-pll.c |   2 +
 drivers/media/i2c/mt9m114.c    | 271 +++++++++++++++++++++++++++++------------
 3 files changed, 193 insertions(+), 81 deletions(-)
---
base-commit: b70886ff5833cf499e77af77d2324ce8f68b60ce
change-id: 20251224-mt9m114-atomisp-31a4d366328a

Best regards,
-- 
Hans de Goede <johannes.goede@....qualcomm.com>