From: Vinod Koul <vkoul@kernel.org>
To: Peter Collingbourne <pcc@google.com>
Cc: Robert Foss <robert.foss@linaro.org>,
John Stultz <john.stultz@linaro.org>,
Anibal Limon <anibal.limon@linaro.org>,
Bjorn Andersson <bjorn.andersson@linaro.org>,
dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] lontium-lt9611: check a different register bit for HDMI sensing
Date: Tue, 30 Nov 2021 11:00:49 +0530 [thread overview]
Message-ID: <YaW3Cff+AJqT8tS/@matsya> (raw)
In-Reply-To: <20211117020724.2647769-1-pcc@google.com>
On 16-11-21, 18:07, Peter Collingbourne wrote:
> It has been observed that with certain monitors such as the HP Z27n,
> the register 0x825e reads a value of 0x79 when the HDMI cable is
> connected and 0x78 when it is disconnected, i.e. bit 0 appears
> to correspond to the HDMI connection status and bit 2 is never
> set. Therefore, change the driver to check bit 0 instead of bit 2.
So we have got limited information on this but BIT-2 seems to be related
to HPD and empirical data from various monitors supports this, so this
seems the right thing to do.
Reviewed-by: Vinod Koul <vkoul@kernel.org>
--
~Vinod
next prev parent reply other threads:[~2021-11-30 5:30 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-11-17 2:07 Peter Collingbourne
2021-11-17 4:47 ` John Stultz
2021-11-17 5:10 ` Vinod Koul
[not found] ` <CA+_AqisE1yMvkPvRtp-8ZxMSpuwmfTrETkomfQHgSM-sEazuaQ@mail.gmail.com>
2021-11-17 5:09 ` Vinod Koul
2021-11-30 5:30 ` Vinod Koul [this message]
2021-11-30 12:17 ` Robert Foss
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