[0/6] R-Car DU DPAD support for D3 and E3

Message

Laurent Pinchart Jan. 17, 2019, 1:49 a.m. UTC

Hello,

This series adds support for the DPAD0 output for the D3 and E3 SoCs. On
the Draak and Ebisu boards, DPAD0 is used for the VGA output.

Patches 1/6 and 2/6 prepare the grounds by successfully probing LVDS
encoders that have no connected output. This is required in order to
provide a dot clock to the DPAD output, as on the D3 and E3 SoCs the dot
clock is provided by the LVDS encoders.

Patch 3/6 then adds an API to the LVDS encoder driver to control the
LVDS output clock independently of the LVDS encoder itself, and patch
4/6 makes use of that API to control the clock from the DU driver.

Patches 5/6 and 6/6 finally enable the LVDS1 encoders in the Ebisu and
Draak boards DTs, required to operate the HDMI (out of LVDS0) and VGA
(using the LVDS1 dot clock) together.

The patches have been tested on Draak only as I don't have access to an
Ebisu board, but they should work equally well on both boards.

For your convenience the patches are available from

	git://linuxtv.org/pinchartl/media.git drm/du/next

Laurent Pinchart (6):
  drm: rcar-du: Simplify encoder registration
  drm: rcar-du: lvds: Don't fail probe if output is not connected on
    D3/E3
  drm: rcar-du: lvds: Add API to enable/disable clock output
  drm: rcar-du: Turn LVDS clock output on/off for DPAD0 output on D3/E3
  arm64: dts: renesas: r8a77990: ebisu: Enable LVDS1 encoder
  arm64: dts: renesas: r8a77995: draak: Enable LVDS1 encoder

 .../arm64/boot/dts/renesas/r8a77990-ebisu.dts |  2 +
 .../arm64/boot/dts/renesas/r8a77995-draak.dts |  2 +
 drivers/gpu/drm/rcar-du/rcar_du_crtc.c        | 34 +++++++
 drivers/gpu/drm/rcar-du/rcar_du_drv.h         |  3 +
 drivers/gpu/drm/rcar-du/rcar_du_encoder.c     |  4 +-
 drivers/gpu/drm/rcar-du/rcar_du_encoder.h     |  3 +-
 drivers/gpu/drm/rcar-du/rcar_du_kms.c         | 52 +----------
 drivers/gpu/drm/rcar-du/rcar_lvds.c           | 92 ++++++++++++++++---
 drivers/gpu/drm/rcar-du/rcar_lvds.h           | 18 ++++
 9 files changed, 146 insertions(+), 64 deletions(-)
 create mode 100644 drivers/gpu/drm/rcar-du/rcar_lvds.h