Re: [PATCH v6 00/14] Add some DRM bridge drivers support for i.MX8qm/qxp SoCs

[Marcel Ziswiler <marcel.ziswiler@toradex.com>]

Hi Liu

Some further discrepancy with them binding examples:

arch/arm64/boot/dts/freescale/imx8qxp.dtsi:335.9-36: Warning (reg_format): /dpu@56180000:reg: property has
invalid length (8 bytes) (#address-cells == 2, #size-cells == 2)
arch/arm64/boot/dts/freescale/imx8qxp.dtsi:508.9-35: Warning (reg_format): /syscon@56221000:reg: property has
invalid length (8 bytes) (#address-cells == 2, #size-cells == 2)
arch/arm64/boot/dts/freescale/imx8qxp.dtsi:601.9-34: Warning (reg_format): /phy@56228300:reg: property has
invalid length (8 bytes) (#address-cells == 2, #size-cells == 2)
arch/arm64/boot/dts/freescale/imx8qxp.dtsi:613.9-36: Warning (reg_format): /pixel-combiner@56020000:reg:
property has invalid length (8 bytes) (#address-cells == 2, #size-cells == 2)

And with that I am unable to bring it up:

[    1.714498] imx8qxp-ldb 5622100000001000.syscon:ldb: [drm:ldb_init_helper] *ERROR* failed to get regmap: -12
[    1.724441] imx8qxp-ldb: probe of 5622100000001000.syscon:ldb failed with error -12
[    1.734983] imx8qxp-pixel-combiner 5602000000010000.pixel-combiner: invalid resource
[    1.742830] imx8qxp-pixel-combiner: probe of 5602000000010000.pixel-combiner failed with error -22
[    1.754040] imx8qxp-display-pixel-link dc0-pixel-link0: [drm:imx8qxp_pixel_link_bridge_probe] *ERROR* failed
to get pixel link node alias id: -19
[    1.769626] imx8qxp-pxl2dpi 5622100000001000.syscon:pxl2dpi: [drm:imx8qxp_pxl2dpi_bridge_probe] *ERROR*
failed to get regmap: -12
[    1.781397] imx8qxp-pxl2dpi: probe of 5622100000001000.syscon:pxl2dpi failed with error -12
[    1.840547] imx8qxp-lpcg-clk 59580000.clock-controller: deferred probe timeout, ignoring dependency
[    1.840571] imx8qxp-lpcg-clk: probe of 59580000.clock-controller failed with error -110

Any suggestions welcome. Thanks!

Cheers

Marcel

On Wed, 2021-03-17 at 11:42 +0800, Liu Ying wrote:
> Hi,
> 
> This is the v6 series to add some DRM bridge drivers support
> for i.MX8qm/qxp SoCs.
> 
> The bridges may chain one by one to form display pipes to support
> LVDS displays.  The relevant display controller is DPU embedded in
> i.MX8qm/qxp SoCs.
> 
> The DPU KMS driver can be found at:
> https://www.spinics.net/lists/arm-kernel/msg878542.html
> 
> This series supports the following display pipes:
> 1) i.MX8qxp:
> prefetch eng -> DPU -> pixel combiner -> pixel link ->
> pixel link to DPI(PXL2DPI) -> LVDS display bridge(LDB)
> 
> 2) i.MX8qm:
> prefetch eng -> DPU -> pixel combiner -> pixel link -> LVDS display bridge(LDB)
> 
> 
> This series dropped the patch 'phy: Add LVDS configuration options', as
> suggested by Robert Foss, because it has already been sent with the following
> series to add Mixel combo PHY found in i.MX8qxp:
> https://www.spinics.net/lists/arm-kernel/msg879957.html
> 
> So, this version depends on that series.
> 
> 
> Patch 1/14 and 2/14 add bus formats used by pixel combiner.
> 
> Patch 7/14 adds dt-binding for Control and Status Registers module(a syscon
> used by PXL2DPI and LDB), which references the PXL2DPI and LDB schemas.
> 
> Patch 10/14 adds a helper for LDB bridge drivers.
> 
> Patch 3/14 ~ 6/14, 8/14, 9/14 and 11/14 ~ 13/14 add drm bridge drivers and
> dt-bindings support for the bridges.
> 
> Patch 14/14 updates MAINTAINERS.
> 
> 
> I've tested this series with a koe,tx26d202vm0bwa dual link LVDS panel and
> a LVDS to HDMI bridge(with a downstream drm bridge driver).
> 
> 
> Welcome comments, thanks.
> 
> v5->v6:
> * Fix data organizations in documentation(patch 2/14) for
>   MEDIA_BUS_FMT_RGB{666,888}_1X30-CPADLO. (Laurent)
> * Add Laurent's R-b tags on patch 1/14 and 2/14.
> * Drop 'select' schema from the CSR dt-binding documentation(patch 7/14). (Rob)
> * Add Rob's R-b tag on patch 8/14.
> 
> v4->v5:
> * Drop the patch 'phy: Add LVDS configuration options'. (Robert)
> * Add Robert's R-b tags on patch 1/14, 2/14, 4/14 and 6/14.
> * Drop the 'PC_BUF_PARA_REG' register definition from the pixel combiner bridge
>   driver(patch 4/14). (Robert)
> * Make a comment occupy a line in the pixel link bridge driver(patch 6/14).
>   (Robert)
> * Introduce a new patch(patch 7/14) to add dt-binding for Control and Status
>   Registers module. (Rob)
> * Make imx-ldb-helper be a pure object to be linked with i.MX8qxp LDB bridge
>   driver and i.MX8qm LDB bridge driver, instead of a module.  Correspondingly,
>   rename 'imx8{qm, qxp}-ldb.c' to 'imx8{qm, qxp}-ldb-drv.c'. (Robert)
> * Move 'imx_ldb_helper.h' to 'drivers/gpu/drm/bridge/imx/imx-ldb-helper.h'.
>   (Robert)
> * s/__FSL_IMX_LDB__/__IMX_LDB_HELPER__/  for 'imx-ldb-helper.h'.
> 
> v3->v4:
> * Use 'fsl,sc-resource' DT property to get the SCU resource ID associated with
>   the PXL2DPI instance instead of using alias ID. (Rob)
> * Add Rob's R-b tag on patch 11/14.
> 
> v2->v3:
> * Drop 'fsl,syscon' DT properties from fsl,imx8qxp-ldb.yaml and
>   fsl,imx8qxp-pxl2dpi.yaml. (Rob)
> * Mention the CSR module controls LDB and PXL2DPI in fsl,imx8qxp-ldb.yaml and
>   fsl,imx8qxp-pxl2dpi.yaml.
> * Call syscon_node_to_regmap() to get regmaps from LDB bridge helper driver
>   and PXL2DPI bridger driver instead of syscon_regmap_lookup_by_phandle().
> * Drop two macros from pixel link bridge driver which help define functions
>   and define them directly.
> * Properly disable all pixel link controls to POR value by calling
>   imx8qxp_pixel_link_disable_all_controls() from
>   imx8qxp_pixel_link_bridge_probe().
> * Add Rob's R-b tags on patch 4/14 and 6/14.
> 
> v1->v2:
> * Rebase the series upon the latest drm-misc-next branch(5.11-rc2 based).
> * Use graph schema in the dt-bindings of the bridges. (Laurent)
> * Require all four pixel link output ports in fsl,imx8qxp-pixel-link.yaml.
>   (Laurent)
> * Side note i.MX8qm/qxp LDB official name 'pixel mapper' in fsl,imx8qxp-ldb.yaml.
>   (Laurent)
> * Mention pixel link is accessed via SCU firmware in fsl,imx8qxp-pixel-link.yaml.
>   (Rob)
> * Use enum instead of oneOf + const for the reg property of pixel combiner
>   channels in fsl,imx8qxp-pixel-combiner.yaml. (Rob)
> * Rewrite the function to find the next bridge in pixel link bridge driver
>   by properly using OF APIs and dropping unnecessary DT validation. (Rob)
> * Drop unnecessary port availability check in i.MX8qxp pixel link to DPI
>   bridge driver.
> * Drop unnecessary DT validation from i.MX8qxp LDB bridge driver.
> * Use of_graph_get_endpoint_by_regs() and of_graph_get_remote_endpoint() to
>   get the input remote endpoint in imx8qxp_ldb_set_di_id() of i.MX8qxp LDB
>   bridge driver.
> * Avoid using companion_port OF node after putting it in
>   imx8qxp_ldb_parse_dt_companion() of i.MX8qxp LDB bridge driver.
> * Drop unnecessary check for maximum available LDB channels from
>   i.MX8qm LDB bridge driver.
> * Mention i.MX8qm/qxp LDB official name 'pixel mapper' in i.MX8qm/qxp LDB
>   bridge drivers and Kconfig help messages.
> 
> Liu Ying (14):
>   media: uapi: Add some RGB bus formats for i.MX8qm/qxp pixel combiner
>   media: docs: Add some RGB bus formats for i.MX8qm/qxp pixel combiner
>   dt-bindings: display: bridge: Add i.MX8qm/qxp pixel combiner binding
>   drm/bridge: imx: Add i.MX8qm/qxp pixel combiner support
>   dt-bindings: display: bridge: Add i.MX8qm/qxp display pixel link
>     binding
>   drm/bridge: imx: Add i.MX8qm/qxp display pixel link support
>   dt-bindings: mfd: Add i.MX8qm/qxp Control and Status Registers module
>     binding
>   dt-bindings: display: bridge: Add i.MX8qxp pixel link to DPI binding
>   drm/bridge: imx: Add i.MX8qxp pixel link to DPI support
>   drm/bridge: imx: Add LDB driver helper support
>   dt-bindings: display: bridge: Add i.MX8qm/qxp LVDS display bridge
>     binding
>   drm/bridge: imx: Add LDB support for i.MX8qxp
>   drm/bridge: imx: Add LDB support for i.MX8qm
>   MAINTAINERS: add maintainer for DRM bridge drivers for i.MX SoCs
> 
>  .../bindings/display/bridge/fsl,imx8qxp-ldb.yaml   | 173 +++++
>  .../display/bridge/fsl,imx8qxp-pixel-combiner.yaml | 144 +++++
>  .../display/bridge/fsl,imx8qxp-pixel-link.yaml     | 106 +++
>  .../display/bridge/fsl,imx8qxp-pxl2dpi.yaml        | 108 ++++
>  .../devicetree/bindings/mfd/fsl,imx8qxp-csr.yaml   | 192 ++++++
>  .../userspace-api/media/v4l/subdev-formats.rst     | 156 +++++
>  MAINTAINERS                                        |  10 +
>  drivers/gpu/drm/bridge/Kconfig                     |   2 +
>  drivers/gpu/drm/bridge/Makefile                    |   1 +
>  drivers/gpu/drm/bridge/imx/Kconfig                 |  42 ++
>  drivers/gpu/drm/bridge/imx/Makefile                |   9 +
>  drivers/gpu/drm/bridge/imx/imx-ldb-helper.c        | 232 +++++++
>  drivers/gpu/drm/bridge/imx/imx-ldb-helper.h        |  98 +++
>  drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c        | 586 +++++++++++++++++
>  drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c       | 720 +++++++++++++++++++++
>  .../gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c    | 448 +++++++++++++
>  drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c    | 427 ++++++++++++
>  drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c       | 485 ++++++++++++++
>  include/uapi/linux/media-bus-format.h              |   6 +-
>  19 files changed, 3944 insertions(+), 1 deletion(-)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-ldb.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-combiner.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pixel-link.yaml
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/fsl,imx8qxp-pxl2dpi.yaml
>  create mode 100644 Documentation/devicetree/bindings/mfd/fsl,imx8qxp-csr.yaml
>  create mode 100644 drivers/gpu/drm/bridge/imx/Kconfig
>  create mode 100644 drivers/gpu/drm/bridge/imx/Makefile
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx-ldb-helper.c
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx-ldb-helper.h
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx8qm-ldb-drv.c
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-ldb-drv.c
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c
>  create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c
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