[PATCH v2 0/3] Add ilitek ili9341 panel driver

[dillon . minfei]

From: Dillon Min <dillon.minfei@xxxxxxxxx>

Since the st,sf-tc240t-9370-t dts binding already exist in stm32f429-disco.dts
but, the panel driver didn't get accepted from mainline. it's time to submit
patch fot it.

This driver can support two different interface by different dts bindings:
- spi+dpi, use spi to configure register, dpi for graphic data.
  st,sf-tc240t-9370-t
- only spi, just like tiny/ili9341.c (actually, this part is copy from tiny)
  adafruit,yx240qv29

I submited the first patch last year, you can find it at [1].
this patch has one major difference from that one, which is replace the low
level communication way, from spi_sync() to mipi_dbi_{command,
command_stackbuf}() interface, referred from Linus's patch [2].

both the two dpi/dbi interface was tested on stm32f429-disco board, if anyone
want to verify this patch, you need apply the clk patch for this board first,
you can get it from [3]

[1] "drm/panel: Add ilitek ili9341 panel driver"
https://lore.kernel.org/lkml/1590378348-8115-7-git-send-email-dillon.minfei@xxxxxxxxx/

[2] "drm/panel: s6e63m0: Switch to DBI abstraction for SPI"
https://lore.kernel.org/dri-devel/20210611214243.669892-1-linus.walleij@xxxxxxxxxx/

[3]
https://lore.kernel.org/lkml/1590378348-8115-6-git-send-email-dillon.minfei@xxxxxxxxx/

v2:
- replace vcc regulator to bulk regulators in driver, from linus suggestion.
- fix dtbs_check warnings on ili9341 dts binding check.
- add bulk regulation node in ilitek,ili9341.yaml.
v1 link:
https://lore.kernel.org/lkml/1626430843-23823-1-git-send-email-dillon.minfei@xxxxxxxxx/

Dillon Min (3):
  dt-bindings: display: panel: Add ilitek ili9341 panel bindings
  ARM: dts: stm32: fix dtbs_check warning on ili9341 dts binding
  drm/panel: Add ilitek ili9341 panel driver

 .../bindings/display/panel/ilitek,ili9341.yaml     |  78 +++
 arch/arm/boot/dts/stm32f429-disco.dts              |   2 +-
 drivers/gpu/drm/panel/Kconfig                      |  12 +
 drivers/gpu/drm/panel/Makefile                     |   1 +
 drivers/gpu/drm/panel/panel-ilitek-ili9341.c       | 778 +++++++++++++++++++++
 5 files changed, 870 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/display/panel/ilitek,ili9341.yaml
 create mode 100644 drivers/gpu/drm/panel/panel-ilitek-ili9341.c

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2.7.4