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(unknown [IPv6:2804:431:9718:a1b1:9d17:4c45:79a4:9c61]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 3E2AA263971; Mon, 4 Mar 2019 21:54:04 +0000 (GMT) Subject: Re: rpi-b-rev2 can't detect hdmi display due to wrong hpd gpio pull in dts To: Eric Anholt Cc: linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, stefan.wahren@i2se.com, linus.walleij@linaro.org, lkundrak@v3.sk, bcm-kernel-feedback-list@broadcom.com, devicetree@vger.kernel.org, kernel@collabora.com References: <20190304185454.18043-1-helen.koike@collabora.com> <8736o2tmg0.fsf@anholt.net> From: Helen Koike Openpgp: preference=signencrypt Autocrypt: addr=helen.koike@collabora.com; keydata= mQINBFmOMD4BEADb2nC8Oeyvklh+ataw2u/3mrl+hIHL4WSWtii4VxCapl9+zILuxFDrxw1p XgF3cfx7g9taWBrmLE9VEPwJA6MxaVnQuDL3GXxTxO/gqnOFgT3jT+skAt6qMvoWnhgurMGH 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Obymhlfy/HKBDIbyCGBuwYoAkoJ6LR/cqzl/FuhwhuDocCGlXyYaJOwXgHaCvVXI3PLQPxWZ +vPsD+TSVHc9m/YWrOiYDnZn6aO0Uk1Zv/m9+BBkWAwsreLJ/evn3SsJV1omNBTITG+uxXcf JkgmmesIAw8mpI6EeLmReUJLasz8QkzhZIC7t5rGlQI94GQG3Jg2dC+kpaGWOaT5G4FVMcBj iR1nXfMxENVYnM5ag7mBZyD/kru5W1Uj34L6AFaDMXFPwedSCpzzqUiHb0f+nYkfOodf5xy0 46+3THy/NUS/ZZp/rI4F7Y77+MQPVg7vARfHHX1AxYUKfRVW5j88QUB70txn8Vgi1tDrOr4J eD+xr0CvIGa5lKqgQacQtGkpOpJ8zY4ObSvpNubey/qYUE3DCXD0n2Xxk4muTvqlkFpOYA== Message-ID: Date: Mon, 4 Mar 2019 18:54:00 -0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:60.0) Gecko/20100101 Thunderbird/60.5.1 MIME-Version: 1.0 In-Reply-To: <8736o2tmg0.fsf@anholt.net> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 3/4/19 5:27 PM, Eric Anholt wrote: > Helen Koike writes: > >> Hello, >> >> I have a rpi-b-rev2 (two holes, 512M) and when I was trying to test vc4 >> driver, the HDMI wans't being detected. >> >> So I changed the hpd-gpios from ACTIVE_LOW to ACTIVE_HIGH and now it >> works correctly. I can see that modeprint from libdrm detects correctly >> when the display is plugged and when it is unpluggled. >> >> So I was wondering if this is just in my board or if there is an error >> in the dts (which I think it's unlikely). >> >> In any case I am dropping this email here in case anyone else see this >> problem, if you do, try appliying the patch below. > > We even have the GPIO labeled as "HDMI_HPD_P" above, and dt-blob.dts > agrees. You are right, I didn't notice it. > > Reviewed-by: Eric Anholt > Thanks! If Stefan doesn't pick this up shortly, I can. > Thanks for reviewing! Helen