From mboxrd@z Thu Jan 1 00:00:00 1970 From: Tony Lindgren Subject: Re: [PATCH 1/4] ARM: dts: am437x-gp-evm: add HDMI support Date: Fri, 13 Dec 2019 06:57:32 -0800 Message-ID: <20191213145732.GH35479@atomide.com> References: <20191125131100.9839-1-tomi.valkeinen@ti.com> <20191212172104.GY35479@atomide.com> <20191212173110.GA35479@atomide.com> <20191213104204.GB4860@pendragon.ideasonboard.com> <2f5cfca4-d36d-da2d-59ba-b76669daeded@ti.com> <20191213114207.GC4860@pendragon.ideasonboard.com> <36d8dde1-1a76-5a5f-2a41-8bc52dfcf2fa@ti.com> <20191213122845.GD4860@pendragon.ideasonboard.com> <3900f4b3-4604-cb64-ebdd-ae168ef1d2fb@ti.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <3900f4b3-4604-cb64-ebdd-ae168ef1d2fb@ti.com> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: Tomi Valkeinen Cc: mark.rutland@arm.com, devicetree@vger.kernel.org, dri-devel@lists.freedesktop.org, robh+dt@kernel.org, Laurent Pinchart , linux-omap@vger.kernel.org List-Id: linux-omap@vger.kernel.org * Tomi Valkeinen [191213 12:34]: > On 13/12/2019 14:28, Laurent Pinchart wrote: > > > > So... In the DT file, we would have multiple endpoints in the same output port in DSS, one going to > > > the panel, one to the SiI9022? omapdrm could then create two encoders, one abstracting the DPI > > > output and the connection to the panel, one abstracting the DPI output and SiI9022? > > > > That's the idea, yes. > > > > > And then someone would need to handle the GPIO, and set it based on the output used. These kind of > > > gpios are always difficult, as they don't belong anywhere =). > > > > https://lore.kernel.org/lkml/20191211061911.238393-5-hsinyi@chromium.org/ > > > > Still, the infrastructure in omapdrm would need quite a bit of work. > > We're just about to get a helper layer for linear pipelines merged, and > > we already need to go one step further :-) > > Alright, sounds like this will be doable in the future. So let's drop this > and the epos HDMI patches for now. Oh OK. Sounds like no other solution is usable right now short of separate dts files like you've done. > This does sound like quite a bit of work, as you say, so I have no idea when > we can get there (on the omapdrm side). In the minimum we should first get > the big omapdrm rework done, in order to avoid nasty conflicts. > > Thanks for educating me =). Sounds a nice plan though :) Thanks, Tony