[PATCH 0/3] Add VGA support for Apalis iMX6

[Leonardo Costa]

This series adds a device tree overlay that enables the VGA output on Apalis
iMX6, which is driven from a parallel RGB interface passing through a
non-programmable video DAC.

The video DAC is a simple resistor network gated by an active-low
data-enable signal. For the bridge to work properly, this series also
changes the following in the dt-bindings and simple-bridge driver:

- dt-bindings: Add a new compatible for the bridge in the simple-bridge
  binding. This is necessary because the existing dumb-vga-dac compatible
  doesn't describe a data-enable signal polarity.

- simple-bridge: Add the VGA bridge match-table entry and timings
  struct, setting the DRM_BUS_FLAG_DE_LOW flag for the bridge.

This change depends on another patch, and should be applied after it:

- https://lore.kernel.org/all/20261002-v1-simple-bridge-atomic-check-v1-1-ef5d8332b078@toradex.com/T/#u

  Adds the atomic_check function to the simple-bridge driver, which
  allows the data-enable bus flag to be propagated through the DRM
  pipeline. This is necessary for the VGA to work correctly on the
  Apalis iMX6.

Signed-off-by: Leonardo Costa <leonardo.costa at toradex.com>
---
Leonardo Costa (3):
      dt-bindings: display: bridge: simple: Add the Toradex Apalis iMX6 VGA DAC bridge
      drm/bridge: simple-bridge: Add Toradex RGB to VGA DAC bridge
      ARM: dts: imx6q-apalis: Add VGA overlay

 .../bindings/display/bridge/simple-bridge.yaml     |  1 +
 arch/arm/boot/dts/nxp/imx/Makefile                 | 21 ++++++
 .../boot/dts/nxp/imx/imx6q-apalis-eval-vga.dtso    | 79 ++++++++++++++++++++++
 drivers/gpu/drm/bridge/simple-bridge.c             | 10 +++
 4 files changed, 111 insertions(+)
---
base-commit: f5f84daefcd92d7a630066635ecea1433ed5eac7
change-id: 20260928-v1-apalis-imx6-enable-vga-5c7ba6b358fe

Best regards,
-- 
Leonardo Costa <leonardo.costa at toradex.com>