Some R-Car ISP instances have in addition to the channel selector (CS)
an ISP core (CORE) to perform operations on an image stream. The core
function is mapped to a different memory region and has a separate
interrupt than CS, extend the bindings to allow describing this.
On the same SoC different instances of the ISP IP may have, or not have,
the CORE functionality. The CS function on all instances on the SoC are
the same and the documentation describes the full ISP (CS + CORE) as a
single IP block. Where instances not having the CORE function simply
lack the functionality to modify the image data. There are dependencies
on the CS functionality while operating the CORE functionality.
In order for the ISP core to function in memory-to-memory mode it needs
to be feed input data from a Streaming Bridge interface. This interface
is provided thru the VSP-X device. Add an optional new property
"renesas,vspx" to provide a phandle to describe this relationship.
While adding mandatory reg-names and interrupt-names breaks existing
bindings the driver itself remains backward compatible and provides CS
functionality if a single unnamed reg and interrupt property is present.
Furthermore all existing users of the bindings are updated in following
work to add these new mandatory properties.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://lore.kernel.org/r/20250423163113.2961049-2-niklas.soderlund+renesas@ragnatech.se
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>
Document support for the ISP module in the Renesas V4M (r8a779h0) SoC.
This device is compatible with the CSISP module on the other Gen4 SoCs.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Krzysztof Kozlowski <krzk@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
The ISP Channel Selector IP is the same for all current Gen4 devices.
This was not known when adding support for V3U and V4H and a single SoC
specific compatible was used.
Before adding more SoC specific bindings for V4M add a family compatible
fallback for Gen4. That way the driver only needs to be updated once for
Gen4, and we still have the option to fix any problems in the driver if
any testable differences between the SoCs are found.
There are already DTS files using the V3U and V4H compatibles which
needs to be updated to not produce a warning for DTS checks. The driver
also needs to kept the compatible values to be backward compatible , but
for new Gen4 SoCs such as V4M we can avoid this.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
Document support for the ISP module in the Renesas V4H (r8a779g0) SoC.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab@kernel.org>
Add bindings for Renesas R-Car ISP Channel Selector IP. The ISP is
responsible for filtering the MIPI CSI-2 bus and directing the different
CSI-2 virtual channels to different R-Car VIN instances (DMA engines)
for capture.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>
