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From:   Damian Kos <dkos@cadence.com>
To:     Heiko Stuebner <heiko@sntech.de>
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Subject: RE: [PATCH v3 0/5] drm: add support for Cadence MHDP DPI/DP bridge.
Thread-Topic: [PATCH v3 0/5] drm: add support for Cadence MHDP DPI/DP bridge.
Thread-Index: AQHUPrl4RuV2nw6NZEamtE4X6JbKdaTuPgSAgAAo67A=
Date:   Tue, 18 Sep 2018 13:18:07 +0000
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Got it.

-depends on EXTCON=3Dy || (EXTCON=3Dm && DRM_ROCKCHIP=3Dm)
+depends on DRM_ROCKCHIP=3Dm
+select EXTCON

Damian
-----Original Message-----
From: Heiko Stuebner <heiko@sntech.de>=20
Sent: Thursday, September 13, 2018 14:32
To: Damian Kos <dkos@cadence.com>
Cc: David Airlie <airlied@linux.ie>; Rob Herring <robh+dt@kernel.org>; Mark=
 Rutland <mark.rutland@arm.com>; Archit Taneja <architt@codeaurora.org>; An=
drzej Hajda <a.hajda@samsung.com>; Laurent Pinchart <Laurent.pinchart@ideas=
onboard.com>; Gustavo Padovan <gustavo@padovan.org>; Maarten Lankhorst <maa=
rten.lankhorst@linux.intel.com>; Sean Paul <sean@poorly.run>; Sandy Huang <=
hjc@rock-chips.com>; Quentin Schulz <quentin.schulz@bootlin.com>; dri-devel=
@lists.freedesktop.org; devicetree@vger.kernel.org; linux-kernel@vger.kerne=
l.org; linux-arm-kernel@lists.infradead.org; linux-rockchip@lists.infradead=
.org; Przemyslaw Gaj <pgaj@cadence.com>; Lukasz Tyrala <ltyrala@cadence.com=
>; Scott Telford <stelford@cadence.com>; Artur Jedrysek <jartur@cadence.com=
>; Piotr Sroka <piotrs@cadence.com>
Subject: Re: [PATCH v3 0/5] drm: add support for Cadence MHDP DPI/DP bridge=
.

EXTERNAL MAIL


Am Dienstag, 28. August 2018, 12:24:43 CEST schrieb Damian Kos:
> Hello!
>=20
> This is the series of patches that will add support for the Cadence's=20
> DPI/DP bridge. Please note that this is a preliminary version of the=20
> driver and there will be more patches in the future with updates, fixes a=
nd improvements.
> Please keep that in mind when looking at FIXME/TODO/XXX comments.
>=20
> Initially, MHDP driver was developed as a DRM bridge driver and was=20
> planed to be placed in drivers/gpu/drm/bridge/mhdp.c.  However, there=20
> was already a driver for Cadence's DP controller developed by=20
> RockChip, but that driver uses the different DRM framework and looks like=
 a part of a bigger system.
> Both controllers (including firmware) are quite different internally=20
> (MST/FEC/DSC support, link training done by driver, additional=20
> commands, IRQ's
> etc.) but they have similar register map, except for Framer/Streamer=20
> (which is noticeably different), so they appear similar.
>=20
> The following patches contain:
> - Moving common code to drivers/gpu/drm/bridge/cdns-mhdp-common.* and
>   modifying it a bit (mostly new prefixes for functions and data types) s=
o it
>   can be used by two, higher level, drivers.
> - Modifying existing RockChip's DP driver to use the common code after ch=
anges
>   made to it (use the new cdns_mhdp_device structure and new function nam=
es).
> - Modifying DRM helpers a bit. Some are required for new driver, some are
>   updates from DP 1.2 to 1.3 or 1.4.
> - Adding documentation for device tree bindings.
> - Adding preliminary Cadence DPI/DP bridge driver.
>=20
> Some of the things that will be added later on include (but are not=20
> limited
> to):
> - Support for Cadence SD0801 PHY (PHY's driver should be on the way by=20
> now)
> - MST support
> - DSC support
> - FEC support
> - HDCP support

with te Kconfig issue in patch5 fixed, this series tested on
rk3288 (analogix-dp) and rk3399 (analogix-dp + cadence-dp) Everything seems=
 to work that worked before.

Tested-by: Heiko Stuebner <heiko@sntech.de>