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Date: Thu, 12 Mar 2020 09:01:23 +0200 From: Tomi Valkeinen <tomi.valkeinen@...com> To: Laurent Pinchart <laurent.pinchart@...asonboard.com>, Yuti Amonkar <yamonkar@...ence.com> CC: <linux-kernel@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>, <robh+dt@...nel.org>, <maxime@...no.tech>, <airlied@...ux.ie>, <daniel@...ll.ch>, <mark.rutland@....com>, <a.hajda@...sung.com>, <narmstrong@...libre.com>, <jonas@...boo.se>, <jernej.skrabec@...l.net>, <praneeth@...com>, <jsarha@...com>, <mparab@...ence.com>, <sjakhade@...ence.com> Subject: Re: [PATCH v6 3/3] drm: bridge: cdns-mhdp: add j721e wrapper Hi Laurent, On 11/03/2020 22:52, Laurent Pinchart wrote: >> +void cdns_mhdp_j721e_enable(struct cdns_mhdp_device *mhdp) >> +{ >> + /* >> + * Eneble VIF_0 and select DPI2 as its input. DSS0 DPI0 is connected >> + * to eDP DPI2. This is the only supported SST configuration on >> + * J721E. > > Without hardware documentation I can't really comment on this, but I'd > like to make sure it doesn't imply that the MHDP has more than one input > and one output. You can download the TRM for j721e here: http://www.ti.com/lit/pdf/spruil1 MHDP has one DP output, but 4 inputs to support MST and split/dual panel modes. None of those are supported by the drivers, but perhaps some thought should be paid to figure out if adding these features affect the DT bindings. Tomi -- Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki. Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki
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