linux-kernel - Re: [PATCH] drm/imx/dcss: get rid of HPD warning message

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Message-ID: <20220804124714.uv4rkk25srdo2k35@fsr-ub1664-121.ea.freescale.net>
Date:   Thu, 4 Aug 2022 15:47:14 +0300
From:   Laurentiu Palcu <laurentiu.palcu@....nxp.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Lucas Stach <l.stach@...gutronix.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Paul Cercueil <paul@...pouillou.net>,
        Nikita Yushchenko <nikita.yoush@...entembedded.com>,
        dri-devel@...ts.freedesktop.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/imx/dcss: get rid of HPD warning message

On Thu, Jul 21, 2022 at 03:25:02PM +0300, Laurent Pinchart wrote:
> Hi Laurentiu,
> 
> Thank you for the patch.
> 
> On Thu, Jul 21, 2022 at 03:09:12PM +0300, Laurentiu Palcu wrote:
> > When DCSS + MIPI_DSI is used, and the last bridge in the chain supports
> > HPD, we can see a "Hot plug detection already enabled" warning stack
> > trace dump that's thrown when DCSS is initialized.
> > 
> > The problem appeared when HPD was enabled by default in the
> > bridge_connector initialization, which made the
> > drm_bridge_connector_enable_hpd() call, in DCSS init path, redundant.
> > So, let's remove that call.
> > 
> > Fixes: 09077bc311658 ("drm/bridge_connector: enable HPD by default if supported")
> > Signed-off-by: Laurentiu Palcu <laurentiu.palcu@....nxp.com>
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

Applied to drm-misc/drm-misc-fixes.

Thanks,
laurentiu