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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 A505E263971; Mon, 4 Mar 2019 21:53:05 +0000 (GMT) Subject: Re: rpi-b-rev2 can't detect hdmi display due to wrong hpd gpio pull in dts To: Stefan Wahren Cc: linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, linus.walleij@linaro.org, lkundrak@v3.sk, bcm-kernel-feedback-list@broadcom.com, eric@anholt.net, devicetree@vger.kernel.org, kernel@collabora.com References: <20190304185454.18043-1-helen.koike@collabora.com> <1194402400.301453.1551730542978@email.ionos.de> From: Helen Koike Openpgp: preference=signencrypt Autocrypt: addr=helen.koike@collabora.com; keydata= mQINBFmOMD4BEADb2nC8Oeyvklh+ataw2u/3mrl+hIHL4WSWtii4VxCapl9+zILuxFDrxw1p 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5:15 PM, Stefan Wahren wrote: > Hi Helen, > >> Helen Koike hat am 4. März 2019 um 19:54 geschrieben: >> >> >> 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. > > thanks for your report and the patch. I verified your change against dt-blob.dts / downstream file and it's correct. > > I'm sorry but i cannot apply your patch because it doesn't have the proper format. > > Should i take care of this? > Can i add your Signed-off-by including your mail address? I just resent it in a proper format, please check. Thanks! Helen > > Stefan > >> >> Regards, >> Helen >> >> --- >> arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts | 2 +- >> 1 file changed, 1 insertion(+), 1 deletion(-) >> >> diff --git a/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts b/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts >> index 5641d162dfdb..28e7513ce617 100644 >> --- a/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts >> +++ b/arch/arm/boot/dts/bcm2835-rpi-b-rev2.dts >> @@ -93,7 +93,7 @@ >> }; >> >> &hdmi { >> - hpd-gpios = <&gpio 46 GPIO_ACTIVE_LOW>; >> + hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>; >> }; >> >> &pwm { >> -- >> 2.20.1 >>