linux-kernel - [PATCH v3 0/4] drm/panel: simple: add bus-format support for panel-dpi

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Date:   Tue, 28 Jun 2022 20:18:34 +0200
From:   Max Krummenacher <max.oss.09@...il.com>
To:     max.krummenacher@...adex.com
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Rob Herring <robh@...nel.org>,
        Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Maxime Ripard <mripard@...nel.org>,
        Marek Vasut <marex@...x.de>,
        Christoph Niedermaier <cniedermaier@...electronics.com>,
        Francesco Dolcini <francesco.dolcini@...adex.com>,
        Daniel Vetter <daniel@...ll.ch>,
        David Airlie <airlied@...ux.ie>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        Nikita Kiryanov <nikita@...pulab.co.il>,
        Rob Herring <robh+dt@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Thierry Reding <thierry.reding@...il.com>,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 0/4] drm/panel: simple: add bus-format support for panel-dpi

From: Max Krummenacher <max.krummenacher@...adex.com>


Commit 4a1d0dbc8332 ("drm/panel: simple: add panel-dpi support") added
support for defining a panel from device tree provided data.

However support for setting the bus format is missing, so that with
the current implementation a 'panel-dpi' panel can only be used
if the driver of the display interface connected can cope with a
missing bus_format.

This patch series defines the new property bus-format and adds it to
the panel-dpi implementation.

Check initial discussions [1] and [2].
[1] https://lore.kernel.org/all/20220201110717.3585-1-cniedermaier@dh-electronics.com/
[2] https://lore.kernel.org/all/20220222084723.14310-1-max.krummenacher@toradex.com/


Changes in v3:
- New commit to allow for additional port node properties
- Changed the V4L number space as suggested by Rob Herring
- Set constraints for bus-format as suggested by Rob Herring, used
  the range reserved for RGB formats.
- Editorial changes as suggested by Rob Herring
- Moved the bus-format property under the port/endpoint node as
  suggested by Rob Herring

Changes in v2:
- Fix errors found by dt_binding_check
- New commit allowing bus-format property for derived startek yaml
- Fix errors found by dt_binding_check

Max Krummenacher (4):
  dt-bindings: display: panel-common: allow for additional port node
    properties
  dt-bindings: display: add new bus-format property for panel-dpi
  dt-bindings: display: startek,startek-kd050c: allow bus-format
    property
  drm/panel: simple: add bus-format support for panel-dpi

 .../bindings/display/panel/panel-common.yaml  |  2 +-
 .../bindings/display/panel/panel-dpi.yaml     | 26 +++++++++-
 .../display/panel/startek,startek-kd050c.yaml |  1 +
 drivers/gpu/drm/panel/panel-simple.c          | 49 +++++++++++++++++++
 .../dt-bindings/display/dt-media-bus-format.h | 23 +++++++++
 5 files changed, 99 insertions(+), 2 deletions(-)
 create mode 100644 include/dt-bindings/display/dt-media-bus-format.h

-- 
2.20.1