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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2026-08-09 06:14:34 +02:00
Luca Ceresoli
f604819d9c
Convert this driver to DRM_BRIDGE_ATTACH_NO_CONNECTOR and to the
drm_bridge_connector framework which is the current DRM bridge best
practice.
Based on the in-tree dts[i] files this introduces no regression. Based on
the kernel doc of drm_bridge_connector.c:
* To make use of this helper, all bridges in the chain shall report bridge
* operation flags (&drm_bridge->ops) and bridge output type
* (&drm_bridge->type), as well as the DRM_BRIDGE_ATTACH_NO_CONNECTOR attach
* flag (none of the bridges shall create a DRM connector directly).
and each of the 3 LCDIF blocks in the i.MX8MP, all of them comply with the
above requirement:
* For the LCDIF3, the pipeline is:
LCDIF3 -> fsl,imx8mp-hdmi-pvi -> fsl,imx8mp-hdmi-tx -> HDMI connector
And the involved bridges are:
* fsl,imx8mp-hdmi-pvi has ops = 0 (it doesn't set it) because it
implements none the optional features mentioned by those flags, and it
honors the DRM_BRIDGE_ATTACH_NO_CONNECTOR by propagating it
* fsl,imx8mp-hdmi-tx is implemented based on dw-hdmi, which sets ops as
appropriate and also propagates the DRM_BRIDGE_ATTACH_NO_CONNECTOR flag
* display-connector (enabled via the DT overlay if needed) sets ops and
makes DRM_BRIDGE_ATTACH_NO_CONNECTOR mandatory
* The LCDIF2 involves the panel-bridge, display-connector and lvds-decoder
(even though only the pane-bridge is currently supported), and all these
three also set ops as needed and propagate
DRM_BRIDGE_ATTACH_NO_CONNECTOR or make it mandatory.
* The LCDIF1 is used with the adv7511, tc358767 and the panel bridge
drivers which also comply with the requirements.
Tested-by: Martyn Welch <martyn.welch@collabora.com>
Tested-by: Alexander Stein <alexander.stein@ew.tq-group.com> # TQMa8MPxL/MBa8MPxL
Reviewed-by: Liu Ying <victor.liu@nxp.com>
Link: https://patch.msgid.link/20260407-drm-lcdif-dbanc-v4-11-247a16e61ef9@bootlin.com
Signed-off-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
44 lines
1.2 KiB
Plaintext
44 lines
1.2 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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config DRM_MXS
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bool
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help
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Choose this option to select drivers for MXS FB devices
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config DRM_MXSFB
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tristate "i.MX (e)LCDIF LCD controller"
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depends on DRM && OF
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depends on COMMON_CLK
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depends on ARCH_MXS || ARCH_MXC || COMPILE_TEST
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select DRM_CLIENT_SELECTION
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select DRM_MXS
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select DRM_KMS_HELPER
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select DRM_GEM_DMA_HELPER
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select DRM_PANEL
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select DRM_PANEL_BRIDGE
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help
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Choose this option if you have an LCDIF or eLCDIF LCD controller.
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Those devices are found in various i.MX SoC (including i.MX23,
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i.MX28, i.MX6SX, i.MX7 and i.MX8M).
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If M is selected the module will be called mxsfb.
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config DRM_IMX_LCDIF
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tristate "i.MX LCDIFv3 LCD controller"
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depends on DRM && OF
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depends on COMMON_CLK
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depends on ARCH_MXC || COMPILE_TEST
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select DRM_CLIENT_SELECTION
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select DRM_MXS
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select DRM_KMS_HELPER
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select DRM_GEM_DMA_HELPER
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select DRM_PANEL
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select DRM_PANEL_BRIDGE
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select DRM_DISPLAY_HELPER
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select DRM_BRIDGE_CONNECTOR
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help
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Choose this option if you have an LCDIFv3 LCD controller.
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Those devices are found in various i.MX SoC (i.MX8MP,
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i.MXRT).
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If M is selected the module will be called imx-lcdif.
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