Hi,
This is the v3 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/msg871357.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)
Patch 1/14 adds LVDS PHY configuration options, which has already been sent with the following series to add Mixel combo PHY found in i.MX8qxp: https://www.spinics.net/lists/arm-kernel/msg862560.html
Patch 2/14 and 3/14 add bus formats used by PXL2DPI.
Patch 4/14 ~ 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.
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): phy: Add LVDS configuration options 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: 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 | 102 +++ .../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 | 52 ++ drivers/gpu/drm/bridge/imx/Makefile | 6 + drivers/gpu/drm/bridge/imx/imx-ldb-helper.c | 248 +++++++ drivers/gpu/drm/bridge/imx/imx8qm-ldb.c | 585 +++++++++++++++++ drivers/gpu/drm/bridge/imx/imx8qxp-ldb.c | 719 +++++++++++++++++++++ .../gpu/drm/bridge/imx/imx8qxp-pixel-combiner.c | 452 +++++++++++++ drivers/gpu/drm/bridge/imx/imx8qxp-pixel-link.c | 426 ++++++++++++ drivers/gpu/drm/bridge/imx/imx8qxp-pxl2dpi.c | 488 ++++++++++++++ include/drm/bridge/imx_ldb_helper.h | 98 +++ include/linux/phy/phy-lvds.h | 48 ++ include/linux/phy/phy.h | 4 + include/uapi/linux/media-bus-format.h | 6 +- 20 files changed, 3825 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 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/imx8qm-ldb.c create mode 100644 drivers/gpu/drm/bridge/imx/imx8qxp-ldb.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 create mode 100644 include/drm/bridge/imx_ldb_helper.h create mode 100644 include/linux/phy/phy-lvds.h