Re: (EXT) [PATCH 1/3] media: imx: De-stage imx7-mipi-csis

[Laurent Pinchart <laurent.pinchart@ideasonboard.com>]

Hi Alexander,

On Mon, Feb 14, 2022 at 10:43:59AM +0100, Alexander Stein wrote:
> Am Freitag, 11. Februar 2022, 19:02:14 CET schrieb Jacopo Mondi:
> > The imx7-mipi-csis driver is in a good state and can be staged.
> > 
> > Move the imx7-mipi-csis.c driver to the newly created
> > drivers/media/platform/imx directory and plumb the related
> > options in Kconfig and in Makefile.
> 
> Please note that there is (at least) one pending patch at [1] which is crucial 
> for my setup.
>
> Also what about calculation for clk_settle in mipi_csis_calculate_params()? Is 
> it really ok to leave it at 0?

It should ideally be computed based on the timing parameters of the
transmitter, but until we figure out how to do so, I don't think it
blocks de-staging the driver. Moving to drivers/media/ doesn't mean
everything has to be perfect, we can continue improving the driver after
the move.

> Despite that I can't say if that driver is ready to be moved out of staging or 
> not.
> 
> Laurent, do you have any preference in which order they should be applied?

Not really, I'm fine with either order.

> [1] https://patchwork.kernel.org/project/linux-arm-kernel/patch/
> 20220211142752.779952-6-alexander.stein@ew.tq-group.com/
> 
> > Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
> > ---
> >  MAINTAINERS                                   |  2 +-
> >  drivers/media/platform/Kconfig                |  1 +
> >  drivers/media/platform/Makefile               |  1 +
> >  drivers/media/platform/imx/Kconfig            | 23 +++++++++++++++++++
> >  drivers/media/platform/imx/Makefile           |  1 +
> >  .../platform}/imx/imx7-mipi-csis.c            |  0
> >  drivers/staging/media/imx/Makefile            |  1 -
> >  7 files changed, 27 insertions(+), 2 deletions(-)
> >  create mode 100644 drivers/media/platform/imx/Kconfig
> >  create mode 100644 drivers/media/platform/imx/Makefile
> >  rename drivers/{staging/media => media/platform}/imx/imx7-mipi-csis.c
> > (100%)
> > 
> > diff --git a/MAINTAINERS b/MAINTAINERS
> > index 83d27b57016f..5bdb8c881b0b 100644
> > --- a/MAINTAINERS
> > +++ b/MAINTAINERS
> > @@ -11891,8 +11891,8 @@ T:	git git://linuxtv.org/media_tree.git
> >  F:	Documentation/admin-guide/media/imx7.rst
> >  F:	Documentation/devicetree/bindings/media/nxp,imx7-csi.yaml
> >  F:	Documentation/devicetree/bindings/media/nxp,imx7-mipi-csi2.yaml
> > +F:	drivers/media/platform/imx/imx7-mipi-csis.c
> >  F:	drivers/staging/media/imx/imx7-media-csi.c
> > -F:	drivers/staging/media/imx/imx7-mipi-csis.c
> > 
> >  MEDIA DRIVERS FOR HELENE
> >  M:	Abylay Ospan <aospan@netup.ru>
> > diff --git a/drivers/media/platform/Kconfig b/drivers/media/platform/Kconfig
> > index 9fbdba0fd1e7..d9eeccffea69 100644
> > --- a/drivers/media/platform/Kconfig
> > +++ b/drivers/media/platform/Kconfig
> > @@ -171,6 +171,7 @@ source "drivers/media/platform/xilinx/Kconfig"
> >  source "drivers/media/platform/rcar-vin/Kconfig"
> >  source "drivers/media/platform/atmel/Kconfig"
> >  source "drivers/media/platform/sunxi/Kconfig"
> > +source "drivers/media/platform/imx/Kconfig"
> > 
> >  config VIDEO_TI_CAL
> >  	tristate "TI CAL (Camera Adaptation Layer) driver"
> > diff --git a/drivers/media/platform/Makefile
> > b/drivers/media/platform/Makefile index 28eb4aadbf45..a9466c854610 100644
> > --- a/drivers/media/platform/Makefile
> > +++ b/drivers/media/platform/Makefile
> > @@ -20,6 +20,7 @@ obj-y	+= ti-vpe/
> >  obj-$(CONFIG_VIDEO_MX2_EMMAPRP)		+= mx2_emmaprp.o
> >  obj-$(CONFIG_VIDEO_CODA)		+= coda/
> > 
> > +obj-$(CONFIG_VIDEO_IMX)			+= imx/
> >  obj-$(CONFIG_VIDEO_IMX_PXP)		+= imx-pxp.o
> >  obj-$(CONFIG_VIDEO_IMX8_JPEG)		+= imx-jpeg/
> > 
> > diff --git a/drivers/media/platform/imx/Kconfig
> > b/drivers/media/platform/imx/Kconfig new file mode 100644
> > index 000000000000..0cf35733040c
> > --- /dev/null
> > +++ b/drivers/media/platform/imx/Kconfig
> > @@ -0,0 +1,23 @@
> > +# SPDX-License-Identifier: GPL-2.0-only
> > +
> > +menuconfig VIDEO_IMX
> > +	bool "V4L2 capture drivers for NXP i.MX devices"
> > +	depends on VIDEO_DEV && VIDEO_V4L2 && (ARCH_MXC || COMPILE_TEST)
> > +	help
> > +	  Say yes here to enable support for capture drivers on i.MX SoCs.
> > +	  Support for the single SoC features are selectable in the sub-
> menu
> > +	  options.
> > +
> > +if VIDEO_IMX
> > +
> > +config VIDEO_IMX_MIPI_CSIS
> > +	tristate "MIPI CSI-2 CSIS receiver found on i.MX7 and i.MX8 models"
> > +	select MEDIA_CONTROLLER
> > +	select V4L2_FWNODE
> > +	select VIDEO_V4L2_SUBDEV_API
> > +	default n
> > +	help
> > +	  Video4Linux2 sub-device driver for the MIPI CSI-2 CSIS receiver
> > +	  v3.3/v3.6 found on some i.MX7 and i.MX8 SoCs.
> > +
> > +endif # VIDEO_IMX
> > diff --git a/drivers/media/platform/imx/Makefile
> > b/drivers/media/platform/imx/Makefile new file mode 100644
> > index 000000000000..ee272234c8d7
> > --- /dev/null
> > +++ b/drivers/media/platform/imx/Makefile
> > @@ -0,0 +1 @@
> > +obj-$(CONFIG_VIDEO_IMX_MIPI_CSIS) += imx7-mipi-csis.o
> > diff --git a/drivers/staging/media/imx/imx7-mipi-csis.c
> > b/drivers/media/platform/imx/imx7-mipi-csis.c similarity index 100%
> > rename from drivers/staging/media/imx/imx7-mipi-csis.c
> > rename to drivers/media/platform/imx/imx7-mipi-csis.c
> > diff --git a/drivers/staging/media/imx/Makefile
> > b/drivers/staging/media/imx/Makefile index 19c2fc54d424..d82be898145b
> > 100644
> > --- a/drivers/staging/media/imx/Makefile
> > +++ b/drivers/staging/media/imx/Makefile
> > @@ -15,5 +15,4 @@ obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-media-csi.o
> >  obj-$(CONFIG_VIDEO_IMX_CSI) += imx6-mipi-csi2.o
> > 
> >  obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-media-csi.o
> > -obj-$(CONFIG_VIDEO_IMX7_CSI) += imx7-mipi-csis.o
> >  obj-$(CONFIG_VIDEO_IMX7_CSI) += imx8mq-mipi-csi2.o

-- 
Regards,

Laurent Pinchart