[RFC PATCH 00/10] Support simple-framebuffer on imx8m

Dario Binacchi
2024-10-28T10:28:07Z

This series is the Linux counterpart of what was sent to U-Boot [1]
for the support of the simple-framebuffer for the BSH SMM S2Pro board.

The need to avoid re-initializing the hardware (power domains,
controllers, bridges, display panels) that has already been initialized
and kept powered on by the bootloader has required updating more than
one YAML file, with the addition of boolean properties to inform the
driver that the corresponding hardware has been initialized and left
on by the bootloader. All these properties are added on the fly by the
bootloader to the various relevant nodes.

Support for the simple framebuffer for the dts of imx8mn-bsh-smm-s2/pro
board has been sent with a separate patch from this series [2].

[1] https://lore.kernel.org/all/20240913095622.72377-18-dario.binacchi@amarulasolutions.com/T/
[2] https://lore.kernel.org/imx/20241024102800.3481574-1-dario.binacchi@amarulasolutions.com/T/

Dario Binacchi (10):
dt-bindings: soc: imx-blk-ctrl: add 'fsl,power-domains-boot-on'
property
pmdomain: imx8m-blk-ctrl: don't turn on a power domain already on
dt-bindings: power: gpcv2: add 'fsl,boot-on' property
pmdomain: imx: gpcv2: don't turn on a power domain already on
dt-bindings: display: panel: add 'syna,boot-on' property
drm/panel: synaptics-r63353: don't re-activate the panel if already
setup
dt-bindings: bridge: samsung-dsim: add 'samsung,boot-on' property
drm: bridge: samsung-dsim: don't re-activate the bridge if already
setup
dt-bindings: lcdif: add 'fsl,boot-on' property
drm/mxsfb: stop controller and drain FIFOs if already initialized

.../display/bridge/samsung,mipi-dsim.yaml | 5 ++
.../bindings/display/fsl,lcdif.yaml | 5 ++
.../display/panel/synaptics,r63353.yaml | 5 ++
.../bindings/power/fsl,imx-gpcv2.yaml | 6 +++
.../soc/imx/fsl,imx8mn-disp-blk-ctrl.yaml | 9 ++++
drivers/gpu/drm/bridge/samsung-dsim.c | 13 ++++-
drivers/gpu/drm/mxsfb/mxsfb_drv.c | 3 ++
drivers/gpu/drm/mxsfb/mxsfb_drv.h | 1 +
drivers/gpu/drm/mxsfb/mxsfb_kms.c | 14 ++++-
.../gpu/drm/panel/panel-synaptics-r63353.c | 10 +++-
drivers/pmdomain/imx/gpcv2.c | 32 +++++++++++-
drivers/pmdomain/imx/imx8m-blk-ctrl.c | 51 ++++++++++++++++++-
12 files changed, 148 insertions(+), 6 deletions(-)

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2.43.0