linux-kernel - Re: [PATCH v2 00/32] media: add imx93 mipi/controller csi support

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Message-ID: <aKXeG0+QxcgZYiUE@lizhi-Precision-Tower-5810>
Date: Wed, 20 Aug 2025 10:39:23 -0400
From: Frank Li <Frank.li@....com>
To: Rui Miguel Silva <rmfrfs@...il.com>,
	Laurent Pinchart <laurent.pinchart@...asonboard.com>,
	Martin Kepplinger <martink@...teo.de>,
	Purism Kernel Team <kernel@...i.sm>,
	Mauro Carvalho Chehab <mchehab@...nel.org>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Eugen Hristev <eugen.hristev@...aro.org>,
	Shawn Guo <shawnguo@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, Peng Fan <peng.fan@....com>,
	Alice Yuan <alice.yuan@....com>, Vinod Koul <vkoul@...nel.org>,
	Kishon Vijay Abraham I <kishon@...nel.org>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Steve Longerbeam <slongerbeam@...il.com>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: linux-media@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, imx@...ts.linux.dev,
	linux-arm-kernel@...ts.infradead.org, linux-phy@...ts.infradead.org,
	linux-staging@...ts.linux.dev, Luis Oliveira <lolivei@...opsys.com>
Subject: Re: [PATCH v2 00/32] media: add imx93 mipi/controller csi support

On Fri, Aug 08, 2025 at 06:39:03PM -0400, Frank Li wrote:
> Totally rewrite CSI part driver compared to V1.

Laurent Pinchart:

	Not sure if you have chance to look this patches, which is big
changeset.

	Please check first 3 patches firstly, which help reduce many
hardcode in current code base.

	media: v4l2-common: Add helper function v4l_get_required_align_by_bpp()
	media: v4l2-common: Add helper function media_bus_fmt_to_csi2_bpp()
	media: v4l2-common: Add helper function media_bus_fmt_to_csi2_dt()

	The other patchset https://lore.kernel.org/imx/20250820-csi2_imx8mq-v5-0-e04a6fc593bd@nxp.com/T/#t
depend on this first 3 patches.

Frank
>
> This only includes CSI related patches.
>
> DTS part: see https://lore.kernel.org/imx/20250701-95_cam-v1-6-c5172bab387b@nxp.com/
> PHY part: see https://lore.kernel.org/imx/20250701-95_cam-v1-4-c5172bab387b@nxp.com/
> AP1302 part: see https://lore.kernel.org/imx/20250701-95_cam-v1-7-c5172bab387b@nxp.com/
> 	upstream: https://lore.kernel.org/imx/20250623-ap1302-v3-0-c9ca5b791494@nxp.com/
>
> First 3 patches add some common helper function to simple code and remove
> duplicated code in difference CSI2 drivers.
>
> Clean up stage imx6 old version csi2 driver, and prepare create common
> dw csi2 library for difference IP version.
>
> Move stage driver under driver/media/synosis.
>
> Create simple platform driver for common dw csi2 use case.
>
> TODO:
> 	1. create bus, to probe phy driver under "test_if" interface for
> specific phys under CSI2.
> 	2. support to combine phy, (which connect to both dw CSI and DSI's
> test_if). Need use DSI's test_if to config combo phy to switch to RX mode.
> and also need config RX part's phy register by use CSI's testif.
> 	3. move other vendor's csi driver to use this common DWC CSI
> library.
>
> Signed-off-by: Frank Li <Frank.Li@....com>
> ---
> Changes in v2:
> - totally rewrite, see above section
> - Link to v1: https://lore.kernel.org/r/20250701-95_cam-v1-0-c5172bab387b@nxp.com
>
> ---
> Eugen Hristev (1):
>       dt-bindings: media: add DW MIPI CSI-2 Host support
>
> Frank Li (31):
>       media: v4l2-common: Add helper function v4l_get_required_align_by_bpp()
>       media: v4l2-common: Add helper function media_bus_fmt_to_csi2_bpp()
>       media: v4l2-common: Add helper function media_bus_fmt_to_csi2_dt()
>       media: staging: media: imx6-mipi-csi2: replace space with tab for alignment
>       media: staging: media: imx6-mipi-csi2: use devm_add_action_or_reset() to simplify code
>       media: staging: media: imx6-mipi-csi2: use devm_clk_bulk_get_all() to fetch clocks
>       media: staging: media: imx6-mipi-csi2: use devm_mutex_init() to simplify code
>       media: staging: media: imx6-mipi-csi2: use guard() to simplify code
>       media: staging: media: imx6-mipi-csi2: use register structure to match hardware
>       media: staging: media: imx6-mipi-csi2: use devm_platform_ioremap_resource() simplify code
>       media: staging: media: imx6-mipi-csi2: move probe part to imx6-csi2.c
>       media: staging: media: imx6-mipi-csi2: move sd imx6's specific initialization into imx6-sci2.c
>       media: staging: media: imx6-mipi-csi2: move csi2ipu_gasket_init() to imx6-csi2.c
>       media: staging: media: imx6-mipi-csi2: move number pad macro define into imx6-csi2.c
>       media: staging: media: imx6-mipi-csi2: move dphy init part to imx6-csi2.c
>       media: staging: media: imx6-mipi-csi2: use runtime_pm frame to control clks
>       media: synopsys: move imx6-mipi-csi2.c to synopsys/mipi-csi2.c
>       media: synopsys: csi2: Remove deprecated s_stream and use v4l2_subdev_pad_ops
>       media: synopsys: csi2: Add phy interface support
>       media: synopsys: csi2: Add basic v150* version register
>       media: synopsys: csi2: Add irq support to record error count
>       media: synopsys: csi2: Handle alignment requirement for width
>       media: synopsys: csi2: Add register prefix to register field definitions
>       media: synopsys: csi2: Add need_dphy_reset in config
>       media: synopsys: csi2: Add default simple dw_csi2_subdev_init_state
>       media: synopsys: csi2: Add v150 lane stop state register bit define
>       media: synopsys: csi2: use standard v4l2_subdev_get_fmt() function
>       media: synopsys: csi2: Add customize get_frame_desc() callback
>       media: synopsys: csi2: Add Image Pixel Interface (IPI) support for v150
>       media: synopsys: csi2: Remove source pad connected check at dw_csi2_enable_streams()
>       media: synopsys: csi2: Add simple synopsys platform driver
>
>  .../bindings/media/snps,dw-mipi-csi2-v150.yaml     |  158 +++
>  MAINTAINERS                                        |    1 +
>  drivers/media/platform/synopsys/Kconfig            |   20 +
>  drivers/media/platform/synopsys/Makefile           |    3 +
>  drivers/media/platform/synopsys/mipi-csi2-simple.c |   75 ++
>  drivers/media/platform/synopsys/mipi-csi2.c        | 1258 ++++++++++++++++++++
>  drivers/media/v4l2-core/v4l2-common.c              |  220 ++++
>  drivers/staging/media/imx/Kconfig                  |    1 +
>  drivers/staging/media/imx/Makefile                 |    2 +-
>  drivers/staging/media/imx/imx6-csi2.c              |  181 +++
>  drivers/staging/media/imx/imx6-mipi-csi2.c         |  846 -------------
>  include/media/dw-mipi-csi2.h                       |  120 ++
>  include/media/mipi-csi2.h                          |    5 +
>  include/media/v4l2-common.h                        |   30 +
>  14 files changed, 2073 insertions(+), 847 deletions(-)
> ---
> base-commit: 33652d58b64e92d2598205fd992989bd93cd61f4
> change-id: 20250606-95_cam-b74c094ad1fb
>
> Best regards,
> --
> Frank Li <Frank.Li@....com>
>