linux-kernel - [PATCH 0/5] Add tda998x (HDMI) support to atmel-hlcdc

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Date:   Mon,  9 Apr 2018 12:59:13 +0200
From:   Peter Rosin <peda@...ntia.se>
To:     linux-kernel@...r.kernel.org
Cc:     Peter Rosin <peda@...ntia.se>, David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Nicolas Ferre <nicolas.ferre@...rochip.com>,
        Alexandre Belloni <alexandre.belloni@...tlin.com>,
        Boris Brezillon <boris.brezillon@...e-electrons.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org
Subject: [PATCH 0/5] Add tda998x (HDMI) support to atmel-hlcdc

Hi!

I naively thought that since there was support for both nxp,tda19988 (in
the tda998x driver) and the atmel-hlcdc, things would be a smooth ride.
But it wasn't, so I started looking around, and found some missing
pieces in the tilcdc driver. A "stole" some things and made it work
for my use case.

During this, I found that the tda998x driver never sets the format in
the connector display_info. Thus, the atmel-hlcdc driver fails to select
output format. Since I had similar problems with ds90c185 lvds encoder
I added patches to override the atmel-hlcdc output format via a DT
property and things start to play together.

Since this series superseeds the bridge series, I have included the
leftover bindings patch for the ti,ds90c185 here. I also noticed that
the driver date for atmel-hlcdc is bonkers, and added a patch for that.

However, I don't know if the tilcdc driver is interfacing with the
tda998x driver in a sane and modern way, and I don't know if I have
missed any subtle point when I "stole" the code and componentized the
atmel-hlcdc driver. I also have not tested how this behaves if I run
with the components as modules (not targeting that).

Anyway, this series solves some real issues for my HW.

Cheers,
Peter

Peter Rosin (5):
  dt-bindings: display: bridge: lvds-transmitter: add ti,ds90c185
  dt-bindings: display: atmel: add optional output-mode property
  drm/atmel-hlcdc: allow overriding the output mode
  drm/atmel-hlcdc: add support for connecting to tda998x HDMI encoder
  drm/atmel-hlcdc: fix broken release date

 .../devicetree/bindings/display/atmel/hlcdc-dc.txt |   4 +
 .../bindings/display/bridge/lvds-transmitter.txt   |   8 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_crtc.c     |  12 +-
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c       | 104 +++++++++++++++--
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.h       |  23 ++++
 drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_output.c   | 130 +++++++++++++++++++++
 6 files changed, 266 insertions(+), 15 deletions(-)

-- 
2.11.0