Hi All

This has been in the pipeline for a while, but I've finally cleaned
up our HEVC decoder driver to be in a shape to upstream.
John Cox has done almost all of the work under contract to Raspberry
Pi, and I'm largely just doing the process of patch curation and
sending.

Thanks
  Dave

v4l2-compliance 1.33.0-5448, 64 bits, 64-bit time_t
v4l2-compliance SHA: bd0aabb96710 2026-02-09 17:38:28

Compliance test for rpi-hevc-dec device /dev/video0:

Driver Info:
	Driver name      : rpi-hevc-dec
	Card type        : rpi-hevc-dec
	Bus info         : platform:rpi-hevc-dec
	Driver version   : 6.19.0
	Capabilities     : 0x84204000
		Video Memory-to-Memory Multiplanar
		Streaming
		Extended Pix Format
		Device Capabilities
	Device Caps      : 0x04204000
		Video Memory-to-Memory Multiplanar
		Streaming
		Extended Pix Format
	Detected Stateless Decoder
Media Driver Info:
	Driver name      : rpi-hevc-dec
	Model            : rpi-hevc-dec
	Serial           : 
	Bus info         : platform:rpi-hevc-dec
	Media version    : 6.19.0
	Hardware revision: 0x00000000 (0)
	Driver version   : 6.19.0
Interface Info:
	ID               : 0x0300000c
	Type             : V4L Video
Entity Info:
	ID               : 0x00000001 (1)
	Name             : rpi-hevc-dec-source
	Function         : V4L2 I/O
	Pad 0x01000002   : 0: Source
	  Link 0x02000008: to remote pad 0x1000004 of entity 'rpi-hevc-dec-proc' (Video Decoder): Data, Enabled, Immutable

Required ioctls:
	test MC information (see 'Media Driver Info' above): OK
	test VIDIOC_QUERYCAP: OK
	test invalid ioctls: OK

Allow for multiple opens:
	test second /dev/video0 open: OK
	test VIDIOC_QUERYCAP: OK
	test VIDIOC_G/S_PRIORITY: OK
	test for unlimited opens: OK

Debug ioctls:
	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
	test VIDIOC_LOG_STATUS: OK (Not Supported)

Input ioctls:
	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
	test VIDIOC_ENUMAUDIO: OK (Not Supported)
	test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
	test VIDIOC_G/S_AUDIO: OK (Not Supported)
	Inputs: 0 Audio Inputs: 0 Tuners: 0

Output ioctls:
	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
	Outputs: 0 Audio Outputs: 0 Modulators: 0

Input/Output configuration ioctls:
	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
	test VIDIOC_G/S_EDID: OK (Not Supported)

Control ioctls:
	test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
	test VIDIOC_QUERYCTRL: OK
	test VIDIOC_G/S_CTRL: OK
		fail: v4l2-test-controls.cpp(942): try_ext_ctrls returned an error (22)
	test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
	Standard Controls: 3 Private Controls: 0
	Standard Compound Controls: 5 Private Compound Controls: 0

Format ioctls:
	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
	test VIDIOC_G/S_PARM: OK (Not Supported)
	test VIDIOC_G_FBUF: OK (Not Supported)
	test VIDIOC_G_FMT: OK
	test VIDIOC_TRY_FMT: OK
	test VIDIOC_S_FMT: OK
	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
	test Cropping: OK (Not Supported)
	test Composing: OK (Not Supported)
	test Scaling: OK (Not Supported)

Codec ioctls:
	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
	test VIDIOC_(TRY_)DECODER_CMD: OK

Buffer ioctls:
	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
	test CREATE_BUFS maximum buffers: OK
	test VIDIOC_REMOVE_BUFS: OK
	test VIDIOC_EXPBUF: OK
	test Requests: OK
	test blocking wait: OK

Total for rpi-hevc-dec device /dev/video0: 49, Succeeded: 48, Failed: 1, Warnings: 0

Testing is with a downstream patchset to FFmpeg. I'm told FFmpeg
currently has no stateless decode support, but we will be reviewing
works that have been in progress and our downstream patches to see
whether that can be pushed onwards.
Downstream tree is at
https://github.com/jc-kynesim/rpi-ffmpeg/tree/test/7.1.2/main

https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9247
adds support for the new formats to GStreamer, and runs Fluster.
Using the JCT-VC-HEVC_V1 test suite we get 142 passes out of 147 tests.
PICSIZE_[ABCD]_Bossen_1 all fail due to the image sizes being greater than
the 4096x4096 limit of this driver.
TSUNEQBD_A_MAIN10_Technicolor_2 fails as the hardware doesn't support
having a different bit depth for luma and chroma.

Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
---
Changes in v6:
- Fixed up assigned by unused variable (ctrl) in hevc_d_init_ctrls
  (reported by CI).
- Fixed up documentation links (reported by CI)
- Link to v5: https://lore.kernel.org/r/20260227-media-rpi-hevc-dec-v5-0-9bb3fc1816de@raspberrypi.com

Changes in v5:
- Updated driver based on Nicolas' review comments of V4.
- Added NV12MT_COL128 to ./drivers/media/v4l2-core/v4l2-common.c. The
  10 bit format can't be represented with v4l2_format_info at present
  as it assumes a power of 2 block size.
- Switched to kzalloc_obj/kzalloc_objs as checkpatch now checks that.
- Link to v4: https://lore.kernel.org/r/20250701-media-rpi-hevc-dec-v4-0-057cfa541177@raspberrypi.com

Changes in v4:
- dt-bindings: Drop to just SoC compatibles and updated description (Krzysztof).
- dts: Corrected address in node name.
- NV12MT_COL128 format description added vertical alignment to a
  multiple of 8 (Nicolas)
- driver: Merged in driver updates based on Nicolas' review.
- driver: Added debug module parameter to avoid log spam due to some bitstreams.
- cover-letter: Added Fluster results.
- rebased and based on the updated version of 
  https://lore.kernel.org/linux-media/20250604-sebastianfricke-vcodec_manual_request_completion_with_state_machine-v3-0-603db4749d90@collabora.com/
- update v4l2-compliance output
- Link to v3: https://lore.kernel.org/r/20250423-media-rpi-hevc-dec-v3-0-8fd3fad1d6fb@raspberrypi.com

Changes in v3:
- Updated the dtbinding with SoC specific compatible strings (Rob).
- Reordered hevc_dec and v3d in bcm2711.dtsi to keep them in ascending
  register order (Stefan).
- Reordered hevc_dec in bcm2711-rpi.dtsi to keep them in alphabetical
  order (Stefan).
- Tested on top of Nicolas' revised version of Hans' patch set for
  manual request completion.
  https://lore.kernel.org/all/20250410-sebastianfricke-vcodec_manual_request_completion_with_state_machine-v2-0-5b99ec0450e6@collabora.com/
- Link to v2: https://lore.kernel.org/r/20250206-media-rpi-hevc-dec-v2-0-69353c8805b2@raspberrypi.com

Changes in v2:
- Rebased to use Hans' manual request completion scheme.
  https://lore.kernel.org/linux-media/cover.1724928939.git.hverkuil-cisco@xs4all.nl/
- Require all slices for a frame to be submitted in one request.
- Added the missing header file.
- Used the full macro name for pix format docs (Sakari)
- Dropped unneeded |- from dtbinding (Rob)
- Made reg and reg-names match in order (Rob)
- Removed clock-names from dtbinding (Rob)
- Driver changed to not request the clock by name
- Dropped clock-names from DTS file
- Minor fixes for compliance failures
  fail: v4l2-test-formats.cpp(958): fmt_cap.g_colorspace() != col
  fail: v4l2-test-buffers.cpp(901): q.create_bufs(node, 1, &fmt) != EINVAL
- v4l2-compliance output added to cover letter (Nicholas)
  I believe the "fail: v4l2-test-controls.cpp(939): try_ext_ctrls
  returned an error (22)" is expected as it is validating the SPS.
  Hantro and Cedrus certainly both appear to return errors in the same place
- Link to v1: https://lore.kernel.org/r/20241220-media-rpi-hevc-dec-v1-0-0ebcc04ed42e@raspberrypi.com

---
Dave Stevenson (4):
      docs: uapi: media: Document Raspberry Pi NV12 column format
      media: ioctl: Add pixel formats NV12MT_COL128 and NV12MT_10_COL128
      dt-bindings: media: Add the Raspberry Pi HEVC decoder
      arm: dts: bcm2711-rpi: Add HEVC decoder node

John Cox (2):
      docs: uapi: media: Clarify HEVC slice_param bit_size, data_byte_offset
      media: platform: Add Raspberry Pi HEVC decoder driver

 .../bindings/media/raspberrypi,hevc-dec.yaml       |   72 +
 .../media/v4l/ext-ctrls-codec-stateless.rst        |    6 +-
 .../userspace-api/media/v4l/pixfmt-yuv-planar.rst  |   46 +
 MAINTAINERS                                        |   10 +
 arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi        |    4 +
 arch/arm/boot/dts/broadcom/bcm2711.dtsi            |    9 +
 drivers/media/platform/raspberrypi/Kconfig         |    1 +
 drivers/media/platform/raspberrypi/Makefile        |    1 +
 .../media/platform/raspberrypi/hevc_dec/Kconfig    |   17 +
 .../media/platform/raspberrypi/hevc_dec/Makefile   |    5 +
 .../media/platform/raspberrypi/hevc_dec/hevc_d.c   |  325 +++
 .../media/platform/raspberrypi/hevc_dec/hevc_d.h   |  195 ++
 .../platform/raspberrypi/hevc_dec/hevc_d_h265.c    | 2436 ++++++++++++++++++++
 .../platform/raspberrypi/hevc_dec/hevc_d_h265.h    |   22 +
 .../platform/raspberrypi/hevc_dec/hevc_d_hw.c      |  429 ++++
 .../platform/raspberrypi/hevc_dec/hevc_d_hw.h      |  317 +++
 .../platform/raspberrypi/hevc_dec/hevc_d_video.c   |  634 +++++
 .../platform/raspberrypi/hevc_dec/hevc_d_video.h   |   38 +
 drivers/media/v4l2-core/v4l2-common.c              |    2 +
 drivers/media/v4l2-core/v4l2-ioctl.c               |    2 +
 include/uapi/linux/videodev2.h                     |    4 +
 21 files changed, 4573 insertions(+), 2 deletions(-)
---
base-commit: 1512bd6430c7be7723724f31a74c3b8aaacf8a20
change-id: 20241212-media-rpi-hevc-dec-3b5be739f3bd

Best regards,
-- 
Dave Stevenson <dave.stevenson@raspberrypi.com>

Hi Dave,

On 3/4/2026 3:05 PM, Dave Stevenson wrote:
> Hi All
> 
> This has been in the pipeline for a while, but I've finally cleaned
> up our HEVC decoder driver to be in a shape to upstream.
> John Cox has done almost all of the work under contract to Raspberry
> Pi, and I'm largely just doing the process of patch curation and
> sending.
> 
> Thanks
>   Dave
> 
> v4l2-compliance 1.33.0-5448, 64 bits, 64-bit time_t
> v4l2-compliance SHA: bd0aabb96710 2026-02-09 17:38:28
> 
> Compliance test for rpi-hevc-dec device /dev/video0:
> 
> Driver Info:
> 	Driver name      : rpi-hevc-dec
> 	Card type        : rpi-hevc-dec
> 	Bus info         : platform:rpi-hevc-dec
> 	Driver version   : 6.19.0
> 	Capabilities     : 0x84204000
> 		Video Memory-to-Memory Multiplanar
> 		Streaming
> 		Extended Pix Format
> 		Device Capabilities
> 	Device Caps      : 0x04204000
> 		Video Memory-to-Memory Multiplanar
> 		Streaming
> 		Extended Pix Format
> 	Detected Stateless Decoder
> Media Driver Info:
> 	Driver name      : rpi-hevc-dec
> 	Model            : rpi-hevc-dec
> 	Serial           : 
> 	Bus info         : platform:rpi-hevc-dec
> 	Media version    : 6.19.0
> 	Hardware revision: 0x00000000 (0)
> 	Driver version   : 6.19.0
> Interface Info:
> 	ID               : 0x0300000c
> 	Type             : V4L Video
> Entity Info:
> 	ID               : 0x00000001 (1)
> 	Name             : rpi-hevc-dec-source
> 	Function         : V4L2 I/O
> 	Pad 0x01000002   : 0: Source
> 	  Link 0x02000008: to remote pad 0x1000004 of entity 'rpi-hevc-dec-proc' (Video Decoder): Data, Enabled, Immutable
> 
> Required ioctls:
> 	test MC information (see 'Media Driver Info' above): OK
> 	test VIDIOC_QUERYCAP: OK
> 	test invalid ioctls: OK
> 
> Allow for multiple opens:
> 	test second /dev/video0 open: OK
> 	test VIDIOC_QUERYCAP: OK
> 	test VIDIOC_G/S_PRIORITY: OK
> 	test for unlimited opens: OK
> 
> Debug ioctls:
> 	test VIDIOC_DBG_G/S_REGISTER: OK (Not Supported)
> 	test VIDIOC_LOG_STATUS: OK (Not Supported)
> 
> Input ioctls:
> 	test VIDIOC_G/S_TUNER/ENUM_FREQ_BANDS: OK (Not Supported)
> 	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> 	test VIDIOC_S_HW_FREQ_SEEK: OK (Not Supported)
> 	test VIDIOC_ENUMAUDIO: OK (Not Supported)
> 	test VIDIOC_G/S/ENUMINPUT: OK (Not Supported)
> 	test VIDIOC_G/S_AUDIO: OK (Not Supported)
> 	Inputs: 0 Audio Inputs: 0 Tuners: 0
> 
> Output ioctls:
> 	test VIDIOC_G/S_MODULATOR: OK (Not Supported)
> 	test VIDIOC_G/S_FREQUENCY: OK (Not Supported)
> 	test VIDIOC_ENUMAUDOUT: OK (Not Supported)
> 	test VIDIOC_G/S/ENUMOUTPUT: OK (Not Supported)
> 	test VIDIOC_G/S_AUDOUT: OK (Not Supported)
> 	Outputs: 0 Audio Outputs: 0 Modulators: 0
> 
> Input/Output configuration ioctls:
> 	test VIDIOC_ENUM/G/S/QUERY_STD: OK (Not Supported)
> 	test VIDIOC_ENUM/G/S/QUERY_DV_TIMINGS: OK (Not Supported)
> 	test VIDIOC_DV_TIMINGS_CAP: OK (Not Supported)
> 	test VIDIOC_G/S_EDID: OK (Not Supported)
> 
> Control ioctls:
> 	test VIDIOC_QUERY_EXT_CTRL/QUERYMENU: OK
> 	test VIDIOC_QUERYCTRL: OK
> 	test VIDIOC_G/S_CTRL: OK
> 		fail: v4l2-test-controls.cpp(942): try_ext_ctrls returned an error (22)
> 	test VIDIOC_G/S/TRY_EXT_CTRLS: FAIL
> 	test VIDIOC_(UN)SUBSCRIBE_EVENT/DQEVENT: OK
> 	test VIDIOC_G/S_JPEGCOMP: OK (Not Supported)
> 	Standard Controls: 3 Private Controls: 0
> 	Standard Compound Controls: 5 Private Compound Controls: 0
> 
> Format ioctls:
> 	test VIDIOC_ENUM_FMT/FRAMESIZES/FRAMEINTERVALS: OK
> 	test VIDIOC_G/S_PARM: OK (Not Supported)
> 	test VIDIOC_G_FBUF: OK (Not Supported)
> 	test VIDIOC_G_FMT: OK
> 	test VIDIOC_TRY_FMT: OK
> 	test VIDIOC_S_FMT: OK
> 	test VIDIOC_G_SLICED_VBI_CAP: OK (Not Supported)
> 	test Cropping: OK (Not Supported)
> 	test Composing: OK (Not Supported)
> 	test Scaling: OK (Not Supported)
> 
> Codec ioctls:
> 	test VIDIOC_(TRY_)ENCODER_CMD: OK (Not Supported)
> 	test VIDIOC_G_ENC_INDEX: OK (Not Supported)
> 	test VIDIOC_(TRY_)DECODER_CMD: OK
> 
> Buffer ioctls:
> 	test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
> 	test CREATE_BUFS maximum buffers: OK
> 	test VIDIOC_REMOVE_BUFS: OK
> 	test VIDIOC_EXPBUF: OK
> 	test Requests: OK
> 	test blocking wait: OK
> 
> Total for rpi-hevc-dec device /dev/video0: 49, Succeeded: 48, Failed: 1, Warnings: 0
> 
> Testing is with a downstream patchset to FFmpeg. I'm told FFmpeg
> currently has no stateless decode support, but we will be reviewing
> works that have been in progress and our downstream patches to see
> whether that can be pushed onwards.

Please see FFmpeg PR20847 "Add V4L2 Request API hwaccels for MPEG2,
H.264, HEVC, VP8, VP9 and AV1" [1] for pending upstream FFmpeg work.

My 4l2request-v3-pixfmts branch [2] also contains extra commit to make
it work with downstream rpi kernel version, using non-MT pixfmts.

I will give this a spin together with the FFmpeg PR, adding support for
the MT based pixfmts should hopefully be easy.

[1] https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20847
[2] https://code.ffmpeg.org/Kwiboo/FFmpeg/commits/branch/v4l2request-v3-pixfmts

Regards,
Jonas

> Downstream tree is at
> https://github.com/jc-kynesim/rpi-ffmpeg/tree/test/7.1.2/main
> 
> https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/9247
> adds support for the new formats to GStreamer, and runs Fluster.
> Using the JCT-VC-HEVC_V1 test suite we get 142 passes out of 147 tests.
> PICSIZE_[ABCD]_Bossen_1 all fail due to the image sizes being greater than
> the 4096x4096 limit of this driver.
> TSUNEQBD_A_MAIN10_Technicolor_2 fails as the hardware doesn't support
> having a different bit depth for luma and chroma.
> 
> Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
> ---
> Changes in v6:
> - Fixed up assigned by unused variable (ctrl) in hevc_d_init_ctrls
>   (reported by CI).
> - Fixed up documentation links (reported by CI)
> - Link to v5: https://lore.kernel.org/r/20260227-media-rpi-hevc-dec-v5-0-9bb3fc1816de@raspberrypi.com
> 
> Changes in v5:
> - Updated driver based on Nicolas' review comments of V4.
> - Added NV12MT_COL128 to ./drivers/media/v4l2-core/v4l2-common.c. The
>   10 bit format can't be represented with v4l2_format_info at present
>   as it assumes a power of 2 block size.
> - Switched to kzalloc_obj/kzalloc_objs as checkpatch now checks that.
> - Link to v4: https://lore.kernel.org/r/20250701-media-rpi-hevc-dec-v4-0-057cfa541177@raspberrypi.com
> 
> Changes in v4:
> - dt-bindings: Drop to just SoC compatibles and updated description (Krzysztof).
> - dts: Corrected address in node name.
> - NV12MT_COL128 format description added vertical alignment to a
>   multiple of 8 (Nicolas)
> - driver: Merged in driver updates based on Nicolas' review.
> - driver: Added debug module parameter to avoid log spam due to some bitstreams.
> - cover-letter: Added Fluster results.
> - rebased and based on the updated version of 
>   https://lore.kernel.org/linux-media/20250604-sebastianfricke-vcodec_manual_request_completion_with_state_machine-v3-0-603db4749d90@collabora.com/
> - update v4l2-compliance output
> - Link to v3: https://lore.kernel.org/r/20250423-media-rpi-hevc-dec-v3-0-8fd3fad1d6fb@raspberrypi.com
> 
> Changes in v3:
> - Updated the dtbinding with SoC specific compatible strings (Rob).
> - Reordered hevc_dec and v3d in bcm2711.dtsi to keep them in ascending
>   register order (Stefan).
> - Reordered hevc_dec in bcm2711-rpi.dtsi to keep them in alphabetical
>   order (Stefan).
> - Tested on top of Nicolas' revised version of Hans' patch set for
>   manual request completion.
>   https://lore.kernel.org/all/20250410-sebastianfricke-vcodec_manual_request_completion_with_state_machine-v2-0-5b99ec0450e6@collabora.com/
> - Link to v2: https://lore.kernel.org/r/20250206-media-rpi-hevc-dec-v2-0-69353c8805b2@raspberrypi.com
> 
> Changes in v2:
> - Rebased to use Hans' manual request completion scheme.
>   https://lore.kernel.org/linux-media/cover.1724928939.git.hverkuil-cisco@xs4all.nl/
> - Require all slices for a frame to be submitted in one request.
> - Added the missing header file.
> - Used the full macro name for pix format docs (Sakari)
> - Dropped unneeded |- from dtbinding (Rob)
> - Made reg and reg-names match in order (Rob)
> - Removed clock-names from dtbinding (Rob)
> - Driver changed to not request the clock by name
> - Dropped clock-names from DTS file
> - Minor fixes for compliance failures
>   fail: v4l2-test-formats.cpp(958): fmt_cap.g_colorspace() != col
>   fail: v4l2-test-buffers.cpp(901): q.create_bufs(node, 1, &fmt) != EINVAL
> - v4l2-compliance output added to cover letter (Nicholas)
>   I believe the "fail: v4l2-test-controls.cpp(939): try_ext_ctrls
>   returned an error (22)" is expected as it is validating the SPS.
>   Hantro and Cedrus certainly both appear to return errors in the same place
> - Link to v1: https://lore.kernel.org/r/20241220-media-rpi-hevc-dec-v1-0-0ebcc04ed42e@raspberrypi.com
> 
> ---
> Dave Stevenson (4):
>       docs: uapi: media: Document Raspberry Pi NV12 column format
>       media: ioctl: Add pixel formats NV12MT_COL128 and NV12MT_10_COL128
>       dt-bindings: media: Add the Raspberry Pi HEVC decoder
>       arm: dts: bcm2711-rpi: Add HEVC decoder node
> 
> John Cox (2):
>       docs: uapi: media: Clarify HEVC slice_param bit_size, data_byte_offset
>       media: platform: Add Raspberry Pi HEVC decoder driver
> 
>  .../bindings/media/raspberrypi,hevc-dec.yaml       |   72 +
>  .../media/v4l/ext-ctrls-codec-stateless.rst        |    6 +-
>  .../userspace-api/media/v4l/pixfmt-yuv-planar.rst  |   46 +
>  MAINTAINERS                                        |   10 +
>  arch/arm/boot/dts/broadcom/bcm2711-rpi.dtsi        |    4 +
>  arch/arm/boot/dts/broadcom/bcm2711.dtsi            |    9 +
>  drivers/media/platform/raspberrypi/Kconfig         |    1 +
>  drivers/media/platform/raspberrypi/Makefile        |    1 +
>  .../media/platform/raspberrypi/hevc_dec/Kconfig    |   17 +
>  .../media/platform/raspberrypi/hevc_dec/Makefile   |    5 +
>  .../media/platform/raspberrypi/hevc_dec/hevc_d.c   |  325 +++
>  .../media/platform/raspberrypi/hevc_dec/hevc_d.h   |  195 ++
>  .../platform/raspberrypi/hevc_dec/hevc_d_h265.c    | 2436 ++++++++++++++++++++
>  .../platform/raspberrypi/hevc_dec/hevc_d_h265.h    |   22 +
>  .../platform/raspberrypi/hevc_dec/hevc_d_hw.c      |  429 ++++
>  .../platform/raspberrypi/hevc_dec/hevc_d_hw.h      |  317 +++
>  .../platform/raspberrypi/hevc_dec/hevc_d_video.c   |  634 +++++
>  .../platform/raspberrypi/hevc_dec/hevc_d_video.h   |   38 +
>  drivers/media/v4l2-core/v4l2-common.c              |    2 +
>  drivers/media/v4l2-core/v4l2-ioctl.c               |    2 +
>  include/uapi/linux/videodev2.h                     |    4 +
>  21 files changed, 4573 insertions(+), 2 deletions(-)
> ---
> base-commit: 1512bd6430c7be7723724f31a74c3b8aaacf8a20
> change-id: 20241212-media-rpi-hevc-dec-3b5be739f3bd
> 
> Best regards,

Hi again,

[snip]

>> Testing is with a downstream patchset to FFmpeg. I'm told FFmpeg
>> currently has no stateless decode support, but we will be reviewing
>> works that have been in progress and our downstream patches to see
>> whether that can be pushed onwards.
> 
> Please see FFmpeg PR20847 "Add V4L2 Request API hwaccels for MPEG2,
> H.264, HEVC, VP8, VP9 and AV1" [1] for pending upstream FFmpeg work.
> 
> My 4l2request-v3-pixfmts branch [2] also contains extra commit to make
> it work with downstream rpi kernel version, using non-MT pixfmts.
> 
> I will give this a spin together with the FFmpeg PR, adding support for
> the MT based pixfmts should hopefully be easy.

My FFmpeg v4l2request-v3-pixfmts branch [2] got a small update that adds
support for this decoder and pix formats. Tested on a rpi5 using the
downstream rpi-6.18 kernel and kodi-gbm for visual playback confirmation.

  [AVHWFramesContext @ 0x7ffeb81abc50] Using V4L2 media driver rpi-hevc-dec (6.18.15) for S265
  [AVHWFramesContext @ 0x7ffeb81abc50] Using CAPTURE buffer format Nc12 (1920x1088)
  [V4L2RequestContext @ 0x7ffeb81abb00] frame-based decoder with SLICE_PARAMS=600, ENTRY_POINT_OFFSETS=0 and SCALING_MATRIX=1 controls

Will update the main FFmpeg PR (and backport branches) with the required
changes after some more testing.

Regards,
Jonas

> [1] https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/20847
> [2] https://code.ffmpeg.org/Kwiboo/FFmpeg/commits/branch/v4l2request-v3-pixfmts
> 
> Regards,
> Jonas

[snip]