On 26/03/18 23:44, Niklas Söderlund wrote:
> Hi,
> This series adds Gen3 VIN support to rcar-vin driver for Renesas r8a7795,
> r8a7796 and r8a77970. It is based on the media-tree and depends on
> Fabrizio Castro patches as they touches the order of the compatible
> strings in the documentation to reduce merge conflicts. The dependencies
> are included in this series.

Laurent, Kieran,

Unless there are any objections I want to make a pull request for this
series once 4.17-rc1 has been merged back into our master tree. It all
looks good to me, and it will be nice to get this in (finally!).

I don't want to postpone the pull request for small improvements, they
can be applied later. But if there are more serious concerns, then let
us know.



> The driver is tested on Renesas H3 (r8a7795, ES2.0),
> M3-W (r8a7796) together with the rcar-csi2 driver (posted separately and
> not yet upstream) and the Salvator-X onboard ADV7482. It is also tested
> on the V3M (r8a77970) on the Eagle board together with its expansion
> board with a ADV7482 and out of tree patches for GMSL capture using the
> max9286 and rdacm20 drivers.
> It is possible to capture both CVBS and HDMI video streams,
> v4l2-compliance passes with no errors and media-ctl can be used to
> change the routing and formats for the different entities in the media
> graph.
> Gen2 compatibility is verified on Koelsch and no problems where found,
> video can be captured just like before and v4l2-compliance passes
> without errors or warnings just like before this series.
> For convenience the series can be fetched from:
>   git://git.ragnatech.se/linux rcar/vin/mc-v13
> I have started on a very basic test suite for the VIN driver at:
>   https://git.ragnatech.se/vin-tests
> And as before the state of the driver and information about how to test
> it can be found on the elinux wiki:
>   http://elinux.org/R-Car/Tests:rcar-vin
> * Changes from v12
> - Rebase to latest media-tree/master changed a 'return ret' to a 'goto
>   out' in rvin_start_streaming() to take recent changes to the VIN 
>   driver into account.
> - Moved field != V4L2_FIELD_ANY in 'rcar-vin: set a default field to  
>   fallback on' check from a later commit 'rcar-vin: simplify how formats 
>   are set and reset' in the series. This is to avoid ignoring the field 
>   returned from the sensor if FIELD_ANY was requested by the user. This 
>   was only a problem between this change and a few patches later, but 
>   better to fix it now. Reported by Hans, thanks for spotting this.
> - Fix spelling.
> - Add review tags from Hans.
> * Changes since v11
> - Rewrote commit message for '[PATCH v11 22/32] rcar-vin: force default
>   colorspace for media centric mode'. Also set fixed values for
>   xfer_func, quantization and ycbcr_enc.
> - Reorderd filed order in struct rvin_group_route.
> - Renamed chan to channel in struct rvin_group_route.
> - Rework 'rcar-vin: read subdevice format for crop only when
>   needed' into 'rcar-vin: simplify how formats are set and reset'.
> - Keep caching the source dimensions and drop all changes to
>   rvin_g_selection() and rvin_s_selection().
> - Inline rvin_get_vin_format_from_source() into rvin_reset_format()
>   which now is the only user left.
> - Add patch to cache the video standard instead of reading it at stream
>   on.
> - Fix error labels in rvin_mc_open().
> - Fixed spelling in commit messages and comment, thanks Laurent!
> - Added reviewed tags from Laurent, Thanks!
> * Changes since v10
> - Corrected spelling in comments and commit messages.
> - Reworked 'rcar-vin: read subdevice format for crop only when needed'
>   to only get the source format once per operation.
> - Moved some patches around to make it easier to review, moved:
>     - rcar-vin: set a default field to fallback on
>     - rcar-vin: fix handling of single field frames (top, bottom and 
> alternate fields)
>     - rcar-vin: update bytesperline and sizeimage calculation
>     - rcar-vin: break out format alignment and checking
>     - rcar-vin: update pixelformat check for M1
>   Before:
>     - rcar-vin: read subdevice format for crop only when needed
> - Rename variable 'code' to 'mbus_code' in struct rvin_dev.
> - Add comment describing no locking is needed in
>   rvin_set_channel_routing().
> - Check return value of pm_runtime_get_sync() in
>   rvin_set_channel_routing().
> - Rework 'rcar-vin: add check for colorspace' to not try to check the
>   format, instead force a default format. This should be revisited once
>   either v4l2-compliance or v4l2 framework changes are worked out to
>   allow for MC centric drivers to validate user supplied colorspace.
> - Add error checking for pm_runtime_get_sync() and
>   v4l2_pipeline_pm_use().
> - Change mutex_lock() to mutex_lock_interruptible() in rvin_mc_open().
> - Rewrote documentation for struct rvin_group_route.
> - Rename rvin_mc_parse_v4l2() to rvin_mc_parse_of_endpoint().
> - Reword error messages in rvin_mc_parse_of_endpoint().
> - Removed unneeded loop in rvin_mc_parse_of_endpoint().
> - Remove check !is_media_entity_v4l2_subdev() in
>   rvin_group_entity_to_csi_id().
> - Add documentation for the algorithm used to figure out if a link can
>   be enabled or not in rvin_group_link_notify().
> - Break out format validation to rvin_mc_validate_format().
> - Include two DT documentation patches from Fabrizio Castro which
>   previously where mentioned as the only dependency for this series.
> - Added reviewed tags from Laurent, Thanks!
> * Changes since v9
> - Fixed mistakes in the device tree description pointed out by  Laurent.
>     - GenX -> GenX platforms
>     - portX -> port X
>     - Explicitly state the on Gen3 platforms port 0 can only describe
>       one endpoint and that only VIN instances connected to external
>       pins should have a port 0 node.
>     - s/which is/connected to/ in he endpoint description for Gen3
>       platforms.
> - Update some poorly written commit messages.
> - Moved the digital subdevice attach and detach code to two separate
>   functions to increase readability.
> - Rename the struct rvin_info member chip to model to better describe
>   its purpose.
> - Change the video name from "rcar_vin e6ef0000.video" to "VINx output"
>   where x is the VIN id.
> - Dropped patch 'rcar-vin: do not allow changing scaling and composing
>   while streaming' as it removed Gen2 functionality which is valid as
>   pointed out by Laurent.
> - Rename rvin_get_sd_format() to rvin_get_source_format() and change its
>   parameter from struct v4l2_pix_format* to struct v4l2_mbus_framefmt*.
> - Clarified commit message and add a few move comments to 'rcar-vin: fix
>   handling of single field frames (top, bottom and alternate fields'.
> - Update documentation for struct rvin_dev fields mbus_cfg and code.
> - Fix argument in VNCSI_IFMD_CSI_CHSEL macro.
> - Renamed rvin_set_chsel() to rvin_set_channel_routing().
> - Restore the VNMC register after changing CHSEL setting.
> - Broke patch 'rcar-vin: break out format alignment and checking' into
>   three parts to ease review.
> - Add new patch to introduce a default field.
> - Only include media/v4l2-mc.h in the .c files that needs it and not in
>   rcar-vin.h.
> - Rename rvin_group_allocate() rvin_group_get()
> - Rename rvin_group_delete() rvin_group_put()
> - Updated error message "VIN number %d already occupied\n" to "Duplicate
>   renesas,id property value %u\n".
> - Removed dev_dbg messages which only where useful during development.
> - Dropped patch '[PATCH v9 10/28] rcar-vin: do not reset crop and
>   compose when setting format' as it introduces a regression on Gen2.
> - Inline rvin_group_read_id() and rvin_group_add_vin() into
>   rvin_group_get().
> - Define static variables at the top of rcar-core.c.
> - Fix potential deadlock in rvin_group_get().
> - Set media device model name to the VIN module name.
> - Set media device model to matched complicity string.
> - Do not use a 2 dimensional sparse array for chsel values in struct
>   rvin_info, instead use a flat array and store VIN and CHSEL value
>   inside each array item.
> - Reworked DT parsing code to make use of the new
>   v4l2_async_notifier_parse_fwnode_endpoints_by_port() helper removing a
>   lot of iffy custom parsing code.
> - Rework how CHSEL value is calculated in the link notifier callback.
>   Using a bitmap of possible values instead of looping over an array
>   turned out great reducing both LoC and increasing readability of the
>   code which was a bit difficult before. It also reduced to memory
>   needed to contain the static routing information.
> - Verify the media bus pixel code when starting a stream.
> - Take the media device graph lock when figuring out and starting a
>   stream so not to race between simultaneous stream start from multiple
>   rcar-vin instances as they might share common subdevices.
> - Added review tags from Laurent.
> - Dropped tags from patches that where changed more then just correcting
>   spelling or other gramma errors.
> * Changes since v8
> - Fixed issue in rvin_group_init() where rvin_group_update_links() was
>   called, but after moving the video device registration to the
>   complete() callback this is now invalid.
> - Fixed spelling in commit messages.
> - Added review and acks from Hans, Kieran and Rob.
> * Changes since v7
> - Dropped '[PATCH v7 02/25] rcar-vin: register the video device at probe time'
> - Add patch which renames four badly name functions. Some of the
>   renaming was in v7 part of the dropped patch 02/25. Make it a own
>   patch and rename all badly named functions in one patch.
> - Add patch to replace part of the functionality of the dropped patch v7
>   02/25. The new patch keeps the subdevice (un)registration calls in the
>   async callbacks bind() and unbind() but moves the direct subdevice
>   initialization which only is used on Gen2 from the Gen2 and Gen3
>   shared rvin_v4l2_register().
> - Add patch to enable Renesas V3M (r8a77970)
> - Patch 'rcar-vin: parse Gen3 OF and setup media graph' have had code
>   additions since v7 since it now registers the video devices in the
>   async complete() callback instead of at probe time as an effect of
>   dropping v7 02/25.
>   - The complete() callback now register all video devices.
>   - The unbind() callback now unregister all video devices.
>   - A new member '*notifier' is added to struct rvin_group which keeps
>     track of which rcar-vin instance have registered its notifier on the
>     groups behalf.
>   For the reason above all Reviewed-by tags have been dropped for this
>   patch.
> - Replaced all kernel messages which used of_node_full_name() as now
>   only returns the basename and not till full path, thanks Geert.
>     printk("%s", of_node_full_name(ep)); -> printk("%pOF", ep);
> - Added Reviewed-by tags from Hans, big thanks!
> * Changes since v6
> - Rebase ontop of latest media-tree which brings in the use of the
>   fwnode async helpers for Gen2.
> - Updated DT binding documentation, thanks Laurent for very helpful
>   input!
> - Removed help text which where copied in from v4l2_ctrl_handler_init()
>   documentation when moving that code block, this was a residue from the
>   soc_camera conversion and should have been removed at that time.
> - Removed bad check of tvnorms which disables IOCTLs if it's not set,
>   this was a residue from soc_camera conversion and have use in the
>   current driver.
> - Moved all subdevice initialization from complete to bound handler
>   while improving the unbind handler. With this move all operations of
>   the ctrl_handler from the subdevice is handled in either bound or
>   unbind removing races pointed out by Laurent.
> - Renamed rvin_v4l2_probe() -> rvin_v4l2_register() and
>   rvin_v4l2_remove() -> rvin_v4l2_unregister().
> - Fold rvin_mbus_supported() into its only caller.
> - Sort compatible string entries in ascending order.
> - Improved documentation for struct rvin_group_chsel.
> - Clarify comment in rvin_group_csi_pad_to_chan().
> - Make use of of_device_get_match_data() as suggested by Geert.
> - Fixed spelling mistakes.
> - Added review tags from Hans.
> * Changes since v5
> - Extract and make use of common format checking for both Gen2 and Gen3.
> - Assign pad at declaration time in rvin_get_sd_format()
> - Always call pm_runtime_{get_sync,put}() and v4l2_pipeline_pm_use()
>   when opening/closing a video device, remove the check of
>   v4l2_fh_is_singular_file().
> - Make rvin_set_chsel() return void instead of int since it always
>   return 0.
> - Simplify the VIN group allocator functions.
> - Make the group notifier callbacks and setup more robust.
> - Moved the video device registration back to probe time.
> - Add H3 ES2.0 support.
> - Fix handling of single field formats (top, bottom, alternate) as this
>   was obviously wrong before but hidden by the Gen2 scaler support.
> - Added review tags from Kieran.
> * Changes since v4 (Not posted to ML)
> - Updated to the new fwnode functions.
> - Moved the registration of the video devices to the async notification
>   callback.
> * Changes since v3
> - Only add neighboring subdevices to the async notifier. Instead of
>   parsing the whole OF graph depend on incremental async subnotifier to
>   discover the whole pipeline. This is needed to support arbitrarily
>   long graphs and support the new ADV7482 prototype driver which Kieran
>   is working on.
> - Fix warning from lockdep, reported by Kieran.
> - Fix commit messages from feedback from Sergei, thanks.
> - Fix chip info an OF device ids sorting order, thanks Geert.
> - Use subdev->of_node instead of subdev->dev->of_node, thanks Kieran.
> * Changes since v2
> - Do not try to control the subdevices in the media graph from the rcar-vin
>   driver. Have user-space configure to format in the pipeline instead.
> - Add link validation before starting the stream.
> - Rework on how the subdevices are and the video node behave by defining
>   specific V4L2 operations for the MC mode of operation, this simplified
>   the driver quit a bit, thanks Laurent!
> - Add a new 'renesas,id' DT property which is needed to to be able to
>   keep the VIN to CSI-2 routing table inside the driver. Previously this
>   information was taken from the CSI-2 DT node which is obviously the
>   wrong way to do things. Thanks Laurent for pointing this out.
> - Fixed a memory leek in the group allocator function.
> - Return -EMLINK instead of -EBUSY if a MC link is not possible given
>   the current routing setup.
> - Add comments to clarify that the 4 channels from the CSI-2 node is not
>   directly related to CSI-2 virtual channels, the CSI-2 node can output
>   any VC on any of its output channels.
> * Changes since v1
> - Remove unneeded casts as pointed out by Geert.
> - Fix spelling and DT documentation as pointed out by Geert and Sergei,
>   thanks!
> - Refresh patch 2/32 with an updated version, thanks Sakari for pointing
>   this out.
> - Add Sakaris Ack to patch 1/32.
> - Rebase on top of v4.9-rc1 instead of v4.9-rc3 to ease integration
>   testing together with renesas-drivers tree.
> Fabrizio Castro (2):
>   dt-bindings: media: rcar_vin: Reverse SoC part number list
>   dt-bindings: media: rcar_vin: add device tree support for r8a774[35]
> Niklas Söderlund (31):
>   rcar-vin: add Gen3 devicetree bindings documentation
>   rcar-vin: rename poorly named initialize and cleanup functions
>   rcar-vin: unregister video device on driver removal
>   rcar-vin: move subdevice handling to async callbacks
>   rcar-vin: move model information to own struct
>   rcar-vin: move max width and height information to chip information
>   rcar-vin: move functions regarding scaling
>   rcar-vin: all Gen2 boards can scale simplify logic
>   rcar-vin: set a default field to fallback on
>   rcar-vin: fix handling of single field frames (top, bottom and
>     alternate fields)
>   rcar-vin: update bytesperline and sizeimage calculation
>   rcar-vin: align pixelformat check
>   rcar-vin: break out format alignment and checking
>   rcar-vin: simplify how formats are set and reset
>   rcar-vin: cache video standard
>   rcar-vin: move media bus configuration to struct rvin_dev
>   rcar-vin: enable Gen3 hardware configuration
>   rcar-vin: add function to manipulate Gen3 chsel value
>   rcar-vin: add flag to switch to media controller mode
>   rcar-vin: use different v4l2 operations in media controller mode
>   rcar-vin: force default colorspace for media centric mode
>   rcar-vin: prepare for media controller mode initialization
>   rcar-vin: add group allocator functions
>   rcar-vin: change name of video device
>   rcar-vin: add chsel information to rvin_info
>   rcar-vin: parse Gen3 OF and setup media graph
>   rcar-vin: add link notify for Gen3
>   rcar-vin: extend {start,stop}_streaming to work with media controller
>   rcar-vin: enable support for r8a7795
>   rcar-vin: enable support for r8a7796
>   rcar-vin: enable support for r8a77970
>  .../devicetree/bindings/media/rcar_vin.txt         | 137 ++-
>  drivers/media/platform/rcar-vin/Kconfig            |   2 +-
>  drivers/media/platform/rcar-vin/rcar-core.c        | 962 
> +++++++++++++++++++--
>  drivers/media/platform/rcar-vin/rcar-dma.c         | 785 ++++++++++-------
>  drivers/media/platform/rcar-vin/rcar-v4l2.c        | 488 ++++++-----
>  drivers/media/platform/rcar-vin/rcar-vin.h         | 146 +++-
>  6 files changed, 1913 insertions(+), 607 deletions(-)

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