kernel/include/media/v4l2-common.h, branch linux-6.18.y

media: v4l2-common: Add legacy camera sensor clock helper

2025-09-09T13:59:19Z

The recently introduced devm_v4l2_sensor_clk_get() helper aims at simplifying sensor drivers by centralizing clock handling code, as well as reducing cargo-cult and deprecated behaviour. A set of drivers implement external clock handling in a non-standard way. This can't be changed as there is a high risk of breaking existing platforms, but keeping the code as-is creates a risk of new drivers copying deprecated behaviour. To fix this, introduce a new devm_v4l2_sensor_clk_get_legacy() helper and use it in those driver. Compared to devm_v4l2_sensor_clk_get(), the new helper takes the "clock-frequency" property into account and sets the external clock rate on OF platforms, and adds the ability to specify a fixed default or fallback clock rate in case the "clock-frequency" property is not present. Signed-off-by: Laurent Pinchart Reviewed-by: Niklas Söderlund Signed-off-by: Sakari Ailus Reviewed-by: Mehdi Djait Signed-off-by: Hans Verkuil

media: include: update Hans Verkuil's email address

2025-09-09T13:58:56Z

Replace hverkuil@xs4all.nl by hverkuil@kernel.org. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab

media: v4l2-common: Constify media_pad argument to v4l2_get_link_freq()

2025-08-31T09:10:06Z

The v4l2_get_link_freq() macro doesn't modify the pad argument. Make it possible to call it with a const media_pad pointer. Link: https://lore.kernel.org/r/20250822002734.23516-2-laurent.pinchart@ideasonboard.com Signed-off-by: Laurent Pinchart Reviewed-by: Frank Li Acked-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: v4l2-common: Update v4l2_get_link_freq() documentation

2025-08-25T13:40:41Z

Document that v4l2_get_link_freq() obtains the link frequency primarily by calling the get_mbus_config sub-device pad operation. Signed-off-by: Sakari Ailus Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: v4l2-common: Drop the workaround from v4l2_get_link_freq()

2025-08-25T13:40:41Z

Remove the workaround that allowed calling v4l2_get_link_freq() on the control handler. Signed-off-by: Sakari Ailus Reviewed-by: Niklas Söderlund Reviewed-by: Laurent Pinchart Signed-off-by: Hans Verkuil

media: v4l2-common: Improve devm_v4l2_sensor_clk_get() documentation

2025-08-14T14:01:39Z

Remove the extra leading period and provide more elaborate explanation for why devm_v4l2_sensor_clk_get() is only allowed to be used on camera sensor devices. Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: v4l2-common: Add a helper for obtaining the clock producer

2025-08-13T13:10:18Z

Introduce a helper for v4l2 sensor drivers on both DT- and ACPI-based platforms to retrieve a reference to the clock producer from firmware. This helper behaves the same as devm_clk_get() except where there is no clock producer like in ACPI-based platforms. For ACPI-based platforms the function will read the "clock-frequency" ACPI _DSD property and register a fixed frequency clock with the frequency indicated in the property. This function also handles the special ACPI-based system case where: . The clock-frequency _DSD property is present. . A reference to the clock producer is present, where the clock is provided by a camera sensor PMIC driver (e.g. int3472/tps68470.c) In this case try to set the clock-frequency value to the provided clock. Reviewed-by: Laurent Pinchart Reviewed-by: Lad Prabhakar Signed-off-by: Mehdi Djait Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: common: Add v4l2_find_nearest_size_conditional()

2025-05-06T11:06:30Z

v4l2_find_nearest_size() returns a mode from sensor driver's mode list that is a best match width and height wise for the sensor. Some drivers have different set of available modes depending on the number of lanes. While this could be handled within a driver by providing different lists of modes, provide a helper v4l2_find_nearest_size_conditional() to ignore modes that aren't available. Also use size_t for the array index and remove extra commas while at it. Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil

media: v4l: Support passing media pad argument to v4l2_get_link_freq()

2025-02-15T14:22:53Z

v4l2_get_link_freq() accepts a V4L2 control handler for now, but it needs to take struct media_pad argument in order to obtain the link frequency using get_mbus_config() pad op. Prepare for this by allowing struct media_pad as well. Signed-off-by: Sakari Ailus Reviewed-by: Tomi Valkeinen Signed-off-by: Hans Verkuil

Merge tag 'media/v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

2024-03-15T18:36:54Z

Pull media updates from Mauro Carvalho Chehab: - DVB budget legacy API was finally documented. It took only 20+ years to get some documentation about it... - hantro driver has gained support for STM32MP25 VDEC/VENC - rkisp1 has gained support for i.MX8MP - atomisp got rid of two items from its todo list. Still 5 items pending for moving it out of staging - lots of driver fixes, cleanups and improvements * tag 'media/v6.9-1' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (252 commits) media: rcar-isp: Disallow unbind of devices media: usbtv: Remove useless locks in usbtv_video_free() media: mediatek: vcodec: avoid -Wcast-function-type-strict warning media: ttpci: fix two memleaks in budget_av_attach media: go7007: fix a memleak in go7007_load_encoder media: dvb-frontends: avoid stack overflow warnings with clang media: pvrusb2: fix uaf in pvr2_context_set_notify media: usb: s2255: Refactor s2255_get_fx2fw media: ti: j721e-csi2rx: Convert to platform remove callback returning void media: stm32-dcmipp: Convert to platform remove callback returning void media: nxp: imx8-isi: Convert to platform remove callback returning void media: nuvoton: Convert to platform remove callback returning void media: chips-media: wave5: Convert to platform remove callback returning void media: chips-media: wave5: Remove unnecessary semicolons media: i2c: imx290: Fix IMX920 typo media: platform: replace of_graph_get_next_endpoint() media: i2c: replace of_graph_get_next_endpoint() media: ivsc: csi: Make use of sub-device state media: ivsc: csi: Swap SINK and SOURCE pads media: ipu-bridge: Serialise calls to IPU bridge init ...