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The subdev state locking macros and macros to get the active state are currently behind CONFIG_MEDIA_CONTROLLER. This makes sense, as there can be no subdev state without MC. However, we have code paths common to MC and non-MC cases which call subdev operations that have subdev state as a parameter. In the non-MC case the state parameter would always be NULL. Thus it makes sense to allow, e.g.: v4l2_subdev_call_state_active(sd, pad, get_fmt, fmt) which for non-MC case would call the subdev passing NULL as the state. This currently fails: https://lore.kernel.org/oe-kbuild-all/202312061101.PLrz5NnJ-lkp@intel.com/ Fix the issue by moving the related macros to be outside CONFIG_MEDIA_CONTROLLER. The v4l2_subdev_lock_state() and v4l2_subdev_unlock_state() macros will crash if given NULL as the state, but the other macros behave correctly even when there's no active state, and they will only call the lock/unlock macros if there is a state. An alternative fix would be to make another version of v4l2_subdev_call_state_try() with ifdefs, which would not use any state macros and would always pass NULL as the state. But having two version of a macro/function is always more confusing than having just one, so I went this way. So, this fixes the v4l2_subdev_call_state_active() macro. But we also have v4l2_subdev_call_state_try(). It would be possible to fix that macro by additionally creating "no-op" variants of the state alloc and free functions. However, v4l2_subdev_call_state_try() is only used by a single driver (stm32-dcmi), which selects MC, and the macro is supposed to be removed as soon as the users have been converted away from the macro. Thus I have not touched the state alloc/free functions, and I think it makes sense to keep alloc/free functions available only if there's actually something that can be allocated or freed. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ideasonboard.com> Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> Link: https://lore.kernel.org/r/20231208-v4l2-state-mc-fix-v1-1-a0c8162557c6@ideasonboard.com Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl> |
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.. | ||
davinci | ||
drv-intf | ||
i2c | ||
tpg | ||
cec-notifier.h | ||
cec-pin.h | ||
cec.h | ||
demux.h | ||
dmxdev.h | ||
dvb_ca_en50221.h | ||
dvb_demux.h | ||
dvb_frontend.h | ||
dvb_net.h | ||
dvb_ringbuffer.h | ||
dvb_vb2.h | ||
dvb-usb-ids.h | ||
dvbdev.h | ||
frame_vector.h | ||
imx.h | ||
ipu-bridge.h | ||
jpeg.h | ||
media-dev-allocator.h | ||
media-device.h | ||
media-devnode.h | ||
media-entity.h | ||
media-request.h | ||
mipi-csi2.h | ||
rc-core.h | ||
rc-map.h | ||
rcar-fcp.h | ||
tuner-types.h | ||
tuner.h | ||
tveeprom.h | ||
v4l2-async.h | ||
v4l2-cci.h | ||
v4l2-common.h | ||
v4l2-ctrls.h | ||
v4l2-dev.h | ||
v4l2-device.h | ||
v4l2-dv-timings.h | ||
v4l2-event.h | ||
v4l2-fh.h | ||
v4l2-flash-led-class.h | ||
v4l2-fwnode.h | ||
v4l2-h264.h | ||
v4l2-image-sizes.h | ||
v4l2-ioctl.h | ||
v4l2-jpeg.h | ||
v4l2-mc.h | ||
v4l2-mediabus.h | ||
v4l2-mem2mem.h | ||
v4l2-rect.h | ||
v4l2-subdev.h | ||
v4l2-vp9.h | ||
videobuf2-core.h | ||
videobuf2-dma-contig.h | ||
videobuf2-dma-sg.h | ||
videobuf2-dvb.h | ||
videobuf2-memops.h | ||
videobuf2-v4l2.h | ||
videobuf2-vmalloc.h | ||
vsp1.h |