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Message-ID: <we7tl65ijs44ae2zxfejmvnml3ls2pkfhcp2fqsmvec2eqevwm@yb45fs7nnf5s>
Date: Wed, 27 Aug 2025 20:03:43 +0530
From: Umang Jain <uajain@...lia.com>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Jai Luthra <jai.luthra@...asonboard.com>,
Florian Fainelli <florian.fainelli@...adcom.com>,
Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
Ray Jui <rjui@...adcom.com>, Scott Branden <sbranden@...adcom.com>,
linux-rpi-kernel@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org,
linux-staging@...ts.linux.dev, linux-kernel@...r.kernel.org, kernel-list@...pberrypi.com,
Stefan Wahren <wahrenst@....net>, Dave Stevenson <dave.stevenson@...pberrypi.com>
Subject: Re: [PATCH 1/5] include: linux: Destage VCHIQ interface headers
On Wed, Aug 27, 2025 at 02:40:16PM +0200, Laurent Pinchart wrote:
> Hi Jai,
>
> Thank you for the patch.
>
> On Wed, Aug 27, 2025 at 11:54:08AM +0530, Jai Luthra wrote:
> > From: Umang Jain <umang.jain@...asonboard.com>
> >
> > Move the VCHIQ headers from drivers/staging/vc04_services/include to
> > include/linux/vchiq
> >
> > This is done so that they can be shared between the VCHIQ interface
> > (which is going to be de-staged in a subsequent commit from staging)
> > and the VCHIQ drivers left in the staging/vc04_services (namely
> > bcm2835-audio, bcm2835-camera).
> >
> > The include/linux/vchiq/ provides a central location to serve both
> > of these areas.
>
> Lots of SoC-specific headers are stored in include/linux/soc/$vendor/.
> This would be include/linux/soc/bcm/vchiq/ in this case. I'm also fine
> with include/linux/vchiq/ but other people may have a preference.
I agree with this point and I might have missed to notice the
include/linux/soc earlier. That's seems a better location to me since
it's actually broadcom-specific.
>
> > Signed-off-by: Umang Jain <umang.jain@...asonboard.com>
> > Signed-off-by: Jai Luthra <jai.luthra@...asonboard.com>
And thanks for taking this over!
> > ---
> > MAINTAINERS | 1 +
> > drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c | 5 +++--
> > drivers/staging/vc04_services/bcm2835-audio/bcm2835.c | 3 ++-
> > drivers/staging/vc04_services/bcm2835-audio/bcm2835.h | 3 +--
> > drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c | 3 ++-
> > drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c | 9 +++++----
> > drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c | 4 ++--
> > drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c | 4 ++--
> > .../staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c | 6 +++---
> > drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c | 7 ++++---
> > drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h | 3 +--
> > drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c | 5 +++--
> > .../include/linux/raspberrypi => include/linux/vchiq}/vchiq.h | 0
> > .../interface/vchiq_arm => include/linux/vchiq}/vchiq_arm.h | 0
> > .../interface/vchiq_arm => include/linux/vchiq}/vchiq_bus.h | 0
> > .../interface/vchiq_arm => include/linux/vchiq}/vchiq_cfg.h | 0
> > .../interface/vchiq_arm => include/linux/vchiq}/vchiq_core.h | 2 +-
> > .../interface/vchiq_arm => include/linux/vchiq}/vchiq_debugfs.h | 0
> > 18 files changed, 30 insertions(+), 25 deletions(-)
> >
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index fe168477caa45799dfe07de2f54de6d6a1ce0615..f17ebb1fa51bd7e4dcb2ae1b0fced6d41685dc84 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -4754,6 +4754,7 @@ T: git https://github.com/broadcom/stblinux.git
> > F: Documentation/devicetree/bindings/pci/brcm,stb-pcie.yaml
> > F: drivers/pci/controller/pcie-brcmstb.c
> > F: drivers/staging/vc04_services
> > +F: include/linux/vchiq
> > N: bcm2711
> > N: bcm2712
> > N: bcm283*
> > diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
> > index 0dbe76ee557032d7861acfc002cc203ff2e6971d..c49f2f7409b84ed6ebdd71787566efb1bc230f55 100644
> > --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
> > +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835-vchiq.c
> > @@ -4,11 +4,12 @@
> > #include <linux/slab.h>
> > #include <linux/module.h>
> > #include <linux/completion.h>
> > +
> > +#include <linux/vchiq/vchiq_arm.h>
>
> You can group this with the other headers above (ideally in alphabetical
> order when #include statements are already sorted). Same comment where
> applicable below.
>
> With that,
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
> > +
> > #include "bcm2835.h"
> > #include "vc_vchi_audioserv_defs.h"
> >
> > -#include "../interface/vchiq_arm/vchiq_arm.h"
> > -
> > struct bcm2835_audio_instance {
> > struct device *dev;
> > unsigned int service_handle;
> > diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
> > index b74cb104e9de00e7688a320949111a419cca084a..5011720940715c12a2d2fe58b40ed84dcb2e6824 100644
> > --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
> > +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.c
> > @@ -6,7 +6,8 @@
> > #include <linux/slab.h>
> > #include <linux/module.h>
> >
> > -#include "../interface/vchiq_arm/vchiq_bus.h"
> > +#include <linux/vchiq/vchiq_bus.h>
> > +
> > #include "bcm2835.h"
> >
> > static bool enable_hdmi;
> > diff --git a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
> > index 49ec5b496edb4ba8634171b1390c4e15181e4048..7e63ef251c37269032fc20ae1237855245e5e0a7 100644
> > --- a/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
> > +++ b/drivers/staging/vc04_services/bcm2835-audio/bcm2835.h
> > @@ -5,13 +5,12 @@
> > #define __SOUND_ARM_BCM2835_H
> >
> > #include <linux/device.h>
> > +#include <linux/vchiq/vchiq.h>
> > #include <linux/wait.h>
> > #include <sound/core.h>
> > #include <sound/pcm.h>
> > #include <sound/pcm-indirect.h>
> >
> > -#include "../include/linux/raspberrypi/vchiq.h"
> > -
> > #define MAX_SUBSTREAMS (8)
> > #define AVAIL_SUBSTREAMS_MASK (0xff)
> >
> > diff --git a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
> > index fa7ea4ca4c36f4ec7f76f6ffbea9f45205116bb8..fcbbe1aa60b768e5a7a08a131f595a0457f4473a 100644
> > --- a/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
> > +++ b/drivers/staging/vc04_services/bcm2835-camera/bcm2835-camera.c
> > @@ -26,7 +26,8 @@
> > #include <media/v4l2-common.h>
> > #include <linux/delay.h>
> >
> > -#include "../interface/vchiq_arm/vchiq_bus.h"
> > +#include <linux/vchiq/vchiq_bus.h>
> > +
> > #include "../vchiq-mmal/mmal-common.h"
> > #include "../vchiq-mmal/mmal-encodings.h"
> > #include "../vchiq-mmal/mmal-vchiq.h"
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
> > index 721b15b7e13b9f25cee7619575bbfa1a4734cce8..10138c1454dd7fdcbab6b95ea41f8e1ac2defc4b 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
> > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.c
> > @@ -30,11 +30,12 @@
> > #include <linux/uaccess.h>
> > #include <soc/bcm2835/raspberrypi-firmware.h>
> >
> > -#include "vchiq_core.h"
> > +#include <linux/vchiq/vchiq_core.h>
> > +#include <linux/vchiq/vchiq_arm.h>
> > +#include <linux/vchiq/vchiq_bus.h>
> > +#include <linux/vchiq/vchiq_debugfs.h>
> > +
> > #include "vchiq_ioctl.h"
> > -#include "vchiq_arm.h"
> > -#include "vchiq_bus.h"
> > -#include "vchiq_debugfs.h"
> >
> > #define DEVICE_NAME "vchiq"
> >
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c
> > index 41ece91ab88aa647a348910a0b913d0b28a8c761..5d55dbff82150a84b15483e71718c48f5cb8caea 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c
> > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.c
> > @@ -11,8 +11,8 @@
> > #include <linux/slab.h>
> > #include <linux/string.h>
> >
> > -#include "vchiq_arm.h"
> > -#include "vchiq_bus.h"
> > +#include <linux/vchiq/vchiq_arm.h>
> > +#include <linux/vchiq/vchiq_bus.h>
> >
> > static int vchiq_bus_type_match(struct device *dev, const struct device_driver *drv)
> > {
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
> > index e2cac0898b8faa3c255de6b8562c7096a9683c49..ac0379f5f45dfa331dc2fec8d580d176f931cf2b 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
> > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.c
> > @@ -15,8 +15,8 @@
> > #include <linux/rcupdate.h>
> > #include <linux/sched/signal.h>
> >
> > -#include "vchiq_arm.h"
> > -#include "vchiq_core.h"
> > +#include <linux/vchiq/vchiq_arm.h>
> > +#include <linux/vchiq/vchiq_core.h>
> >
> > #define VCHIQ_SLOT_HANDLER_STACK 8192
> >
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c
> > index d5f7f61c5626934b819e8ff322e22ae3d6158b31..b1a8f1abafc2fa83132b1a02ba343d71315950de 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c
> > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.c
> > @@ -5,9 +5,9 @@
> > */
> >
> > #include <linux/debugfs.h>
> > -#include "vchiq_core.h"
> > -#include "vchiq_arm.h"
> > -#include "vchiq_debugfs.h"
> > +#include <linux/vchiq/vchiq_core.h>
> > +#include <linux/vchiq/vchiq_arm.h>
> > +#include <linux/vchiq/vchiq_debugfs.h>
> >
> > #ifdef CONFIG_DEBUG_FS
> >
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
> > index 3b20ba5c736221ce1cacfc9ce86eca623382a30b..781d6dd64ee33816b52b62f1f25bcd33363d8e02 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
> > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_dev.c
> > @@ -11,10 +11,11 @@
> > #include <linux/compat.h>
> > #include <linux/miscdevice.h>
> >
> > -#include "vchiq_core.h"
> > +#include <linux/vchiq/vchiq_core.h>
> > +#include <linux/vchiq/vchiq_arm.h>
> > +#include <linux/vchiq/vchiq_debugfs.h>
> > +
> > #include "vchiq_ioctl.h"
> > -#include "vchiq_arm.h"
> > -#include "vchiq_debugfs.h"
> >
> > static const char *const ioctl_names[] = {
> > "CONNECT",
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
> > index afb71a83cfe7035e5dd61003fa99fd514ca18047..638469f18f859a0c7e738ef5bed7bf3c3ebebe59 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
> > +++ b/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_ioctl.h
> > @@ -5,8 +5,7 @@
> > #define VCHIQ_IOCTLS_H
> >
> > #include <linux/ioctl.h>
> > -
> > -#include "../../include/linux/raspberrypi/vchiq.h"
> > +#include <linux/vchiq/vchiq.h>
> >
> > #define VCHIQ_IOC_MAGIC 0xc4
> > #define VCHIQ_INVALID_HANDLE (~0)
> > diff --git a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > index 3fe482bd279390a7586c49bde00f38c61558ca8e..f5e141908b0f91ca4172d48aee37f0329d239d7c 100644
> > --- a/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > +++ b/drivers/staging/vc04_services/vchiq-mmal/mmal-vchiq.c
> > @@ -22,11 +22,12 @@
> > #include <linux/mm.h>
> > #include <linux/slab.h>
> > #include <linux/completion.h>
> > +#include <linux/vchiq/vchiq.h>
> > #include <linux/vmalloc.h>
> > #include <media/videobuf2-vmalloc.h>
> >
> > -#include "../include/linux/raspberrypi/vchiq.h"
> > -#include "../interface/vchiq_arm/vchiq_arm.h"
> > +#include <linux/vchiq/vchiq_arm.h>
> > +
> > #include "mmal-common.h"
> > #include "mmal-vchiq.h"
> > #include "mmal-msg.h"
> > diff --git a/drivers/staging/vc04_services/include/linux/raspberrypi/vchiq.h b/include/linux/vchiq/vchiq.h
> > similarity index 100%
> > rename from drivers/staging/vc04_services/include/linux/raspberrypi/vchiq.h
> > rename to include/linux/vchiq/vchiq.h
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h b/include/linux/vchiq/vchiq_arm.h
> > similarity index 100%
> > rename from drivers/staging/vc04_services/interface/vchiq_arm/vchiq_arm.h
> > rename to include/linux/vchiq/vchiq_arm.h
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h b/include/linux/vchiq/vchiq_bus.h
> > similarity index 100%
> > rename from drivers/staging/vc04_services/interface/vchiq_arm/vchiq_bus.h
> > rename to include/linux/vchiq/vchiq_bus.h
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_cfg.h b/include/linux/vchiq/vchiq_cfg.h
> > similarity index 100%
> > rename from drivers/staging/vc04_services/interface/vchiq_arm/vchiq_cfg.h
> > rename to include/linux/vchiq/vchiq_cfg.h
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h b/include/linux/vchiq/vchiq_core.h
> > similarity index 99%
> > rename from drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
> > rename to include/linux/vchiq/vchiq_core.h
> > index 9b4e766990a493d6e9d4e0604f2c84f4e7b77804..dbcb19e7a6d39b94967261c4ab23d6325e999249 100644
> > --- a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_core.h
> > +++ b/include/linux/vchiq/vchiq_core.h
> > @@ -15,7 +15,7 @@
> > #include <linux/spinlock_types.h>
> > #include <linux/wait.h>
> >
> > -#include "../../include/linux/raspberrypi/vchiq.h"
> > +#include "vchiq.h"
> > #include "vchiq_cfg.h"
> >
> > /* Do this so that we can test-build the code on non-rpi systems */
> > diff --git a/drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.h b/include/linux/vchiq/vchiq_debugfs.h
> > similarity index 100%
> > rename from drivers/staging/vc04_services/interface/vchiq_arm/vchiq_debugfs.h
> > rename to include/linux/vchiq/vchiq_debugfs.h
> >
>
> --
> Regards,
>
> Laurent Pinchart
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