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Mon, 04 Feb 2019 12:34:30 -0800 (PST) X-Gm-Message-State: AHQUAub8fDrqSNT0RDUniM/Xxl+cHK15AIad056UlkkVM2E0ILKRLaTw SUeKAof/hqbdGFmfMPJqnYssldm69EYBTByGeQ== X-Google-Smtp-Source: AHgI3IZKaVBoQKo8RY+yZFmkCKbNle93IKhu8hpqJsU8HF6yis51t4ULVD1AqPZKbGohwYL87T7c/UhhUdRdWrj3PnM= X-Received: by 2002:a37:5686:: with SMTP id k128mr872682qkb.29.1549312469945; Mon, 04 Feb 2019 12:34:29 -0800 (PST) MIME-Version: 1.0 References: <20190203185501.8958-1-anarsoul@gmail.com> <20190203185501.8958-9-anarsoul@gmail.com> <20190204074350.GC16448@ulmo> <20190204082353.GE19087@ulmo> <20190204165637.GA30876@ulmo> In-Reply-To: From: Rob Herring Date: Mon, 4 Feb 2019 14:34:19 -0600 X-Gmail-Original-Message-ID: Message-ID: Subject: Re: [PATCH RESEND v2 08/12] dt-bindings: add binding for generic eDP panel To: Vasily Khoruzhick X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190204_123431_566166_20298E74 X-CRM114-Status: GOOD ( 17.94 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Mark Rutland , devicetree , Archit Taneja , Andrzej Hajda , David Airlie , linux-sunxi , dri-devel , Maxime Ripard , Chen-Yu Tsai , Thierry Reding , Sean Paul , Laurent Pinchart , Daniel Vetter , arm-linux , Icenowy Zheng Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Mon, Feb 4, 2019 at 2:26 PM Vasily Khoruzhick wrote: > > On Mon, Feb 4, 2019 at 12:23 PM Rob Herring wrote: > > > > simple-panel would probably work if you stuck in some mostly compatible > > > string and provided a ddc-i2c-bus property in the device tree node. The > > > generic-ish fallback case could be implemented by providing a fallback > > > compatible string (we used to have "simple-panel", which I think would > > > still be adequate for this I suppose) and adding a dummy descriptor in > > > the driver, perhaps one with pre-defined delays that could be adjusted > > > to work for all cases, or they could just be 0. At least that way we'd > > > be explicitly documenting that we support this as a fallback. > > > > I'd like something more specific than 'simple-panel' that at least > > implies it has EDID and whatever else we think it should imply. > > > > Looking into this a bit more, why don't we just do a connector here? > > eDP has a standard connector (with power). It's just like other > > connectors, but with power and no hotplug. If someone does their own > > interface, then they should do their own connector or panel binding. > > Where do we put backlight in this case? In the connector node. You'd need a backlight supply, 'backlight-enable-gpios' and backlight phandle to pwm-backlight node. Rob _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel