Pull media fixes from Mauro Carvalho Chehab:

 - one regression at vsp1 driver

 - some last time changes for the upcoming request API logic and for
   stateless codec support. As the stateless codec "cedrus" driver is at
   staging, don't apply the MPEG controls as part of the main V4L2 API,
   as those may not be ready for production yet.

* tag 'media/v4.20-5' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: Add a Kconfig option for the Request API
  media: extended-controls.rst: add note to the MPEG2 state controls
  media: mpeg2-ctrls.h: move MPEG2 state controls to non-public header
  media: vicodec: set state resolution from raw format
  media: vivid: drop v4l2_ctrl_request_complete() from start_streaming
  media: vb2: don't unbind/put the object when going to state QUEUED
  media: vb2: keep a reference to the request until dqbuf
  media: vb2: skip request checks for VIDIOC_PREPARE_BUF
  media: vb2: don't call __vb2_queue_cancel if vb2_start_streaming failed
  media: cedrus: Fix a NULL vs IS_ERR() check
  media: vsp1: Fix LIF buffer thresholds

The Request API is now merged to the kernel but the confidence on the
stability of that API is not great, especially regarding the interaction
with V4L2.

Add a Kconfig option for the API, with a scary-looking warning.

The patch itself disables request creation as well as does not advertise
them as buffer flags. The driver requiring requests (cedrus) now depends
on the Kconfig option as well.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

The devm_ioremap_resource() function doesn't return NULL pointers, it
returns error pointers.

Fixes: 50e761516f2b ("media: platform: Add Cedrus VPU decoder driver")

Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Pull media fixes from Mauro Carvalho Chehab:

 - Revert a dt-bindings patch whose driver didn't make for 4.20

 - fix a kernel oops at vicodec driver

 - fix a frame overflow at gspca with was causing regressions on some
   cameras, making them to not work

 - use the proper type for wait_queue head

 - make media request API compatible with 32-bit userspace on 64-bit
   kernel

 - fix a regression on Kernel 4.19 at dvb-pll

 - don't use SPDX headers yet for GFDL

* tag 'media/v4.20-4' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media:
  media: mediactl docs: Fix licensing message
  media: dvb-pll: don't re-validate tuner frequencies
  media: dvb-pll: fix tuner frequency ranges
  media: Revert "media: dt-bindings: Document the Rockchip VPU bindings"
  media: gspca: fix frame overflow error
  media: vicodec: fix memchr() kernel oops
  media: cedrus: add action item to the TODO
  media: media-request: Add compat ioctl
  media: Use wait_queue_head_t for media_request

Pull staging and IIO driver fixes from Greg KH:
 "Here are some small IIO and staging driver fixes for 4.20-rc5.

  Nothing major, the IIO fix ended up touching the HID drivers at the
  same time, but the HID maintainer acked it. The staging fixes are all
  minor patches for reported issues and regressions, full details are in
  the shortlog.

  All of these have been in linux-next for a while with no reported
  issues"

* tag 'staging-4.20-rc5' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/staging:
  iio/hid-sensors: Fix IIO_CHAN_INFO_RAW returning wrong values for signed numbers
  staging: vchiq_arm: fix compat VCHIQ_IOC_AWAIT_COMPLETION
  staging: mt7621-pinctrl: fix uninitialized variable ngroups
  staging: rtl8723bs: Add missing return for cfg80211_rtw_get_station
  staging: most: use format specifier "%s" in snprintf
  staging: rtl8723bs: Fix incorrect sense of ether_addr_equal
  staging: mt7621-dma: fix potentially dereferencing uninitialized 'tx_desc'
  staging: comedi: clarify/unify macros for NI macro-defined terminals
  drivers: staging: cedrus: find ctx before dereferencing it ctx
  staging: rtl8723bs: Fix the return value in case of error in 'rtw_wx_read32()'
  staging: comedi: ni_mio_common: scale ao INSN_CONFIG_GET_CMD_TIMING_CONSTRAINTS
  iio:st_magn: Fix enable device after trigger

Mention that the request validation should increment the memory refcount
of reference buffers so we don't forget to do this.

Acked-by: Paul Kocialkowski <paul.kocialkowski@bootlin.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Currently if count is an invalid value the v4l2_info message will
dereference a null ctx pointer to get the dev information. Fix
this by finding ctx first and then checking for an invalid count,
this way ctxt will be non-null hence avoiding the null pointer
dereference.

Detected by CoverityScan, CID#1475337 ("Explicit null dereferenced")

Fixes: 50e761516f2b ("media: platform: Add Cedrus VPU decoder driver")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Shut up this warning:

	drivers/staging/media/davinci_vpfe/dm365_ipipeif.c: In function 'ipipeif_hw_setup':
	drivers/staging/media/davinci_vpfe/dm365_ipipeif.c:298:3: warning: this statement may fall through [-Wimplicit-fallthrough=]
	   switch (isif_port_if) {
	   ^~~~~~
	drivers/staging/media/davinci_vpfe/dm365_ipipeif.c:314:2: note: here
	  case IPIPEIF_SDRAM_YUV:
	  ^~~~

By annotating a fall though case at the right place.

Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

To be consistent with the rest of the mem2mem helpers,
rename vb2_m2m_request_queue to v4l2_m2m_request_queue.

This is just a cosmetic change.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

Pull new experimental media request API from Mauro Carvalho Chehab:
 "A new media request API

  This API is needed to support device drivers that can dynamically
  change their parameters for each new frame. The latest versions of
  Google camera and codec HAL depends on such feature.

  At this stage, it supports only stateless codecs.

  It has been discussed for a long time (at least over the last 3-4
  years), and we finally reached to something that seem to work.

  This series contain both the API and core changes required to support
  it and a new m2m decoder driver (cedrus).

  As the current API is still experimental, the only real driver using
  it (cedrus) was added at staging[1]. We intend to keep it there for a
  while, in order to test the API. Only when we're sure that this API
  works for other cases (like encoders), we'll move this driver out of
  staging and set the API into a stone.

  [1] We added support for the vivid virtual driver (used only for
  testing) to it too, as it makes easier to test the API for the ones
  that don't have the cedrus hardware"

* tag 'media/v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (53 commits)
  media: dt-bindings: Document the Rockchip VPU bindings
  media: platform: Add Cedrus VPU decoder driver
  media: dt-bindings: media: Document bindings for the Cedrus VPU driver
  media: v4l: Add definition for the Sunxi tiled NV12 format
  media: v4l: Add definitions for MPEG-2 slice format and metadata
  media: videobuf2-core: Rework and rename helper for request buffer count
  media: v4l2-ctrls.c: initialize an error return code with zero
  media: v4l2-compat-ioctl32.c: add missing documentation for a field
  media: media-request: update documentation
  media: media-request: EPERM -> EACCES/EBUSY
  media: v4l2-ctrls: improve media_request_(un)lock_for_update
  media: v4l2-ctrls: use media_request_(un)lock_for_access
  media: media-request: add media_request_(un)lock_for_access
  media: vb2: set reqbufs/create_bufs capabilities
  media: videodev2.h: add new capabilities for buffer types
  media: buffer.rst: only set V4L2_BUF_FLAG_REQUEST_FD for QBUF
  media: v4l2-ctrls: return -EACCES if request wasn't completed
  media: media-request: return -EINVAL for invalid request_fds
  media: vivid: add request support
  media: vivid: add mc
  ...