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bh=T5oGv0G7I5GRBdSZoMEquZtD9DLE+SjefBj4bPO/vkI=; b=QlQOJZJ79tCnSPwzeWdQMqJbIHpMYL0n808Zm4qyt3UKvU4FIh2kmHOGG3Cj/8PTsJ dRlmidGOPIScEE2iFmnbdssIh3jcb637ETXo3A7ICUWKP18G63QG4KBbJareyPqSB9NP QIgn5caq4gmgsGYI+qBHWbBHVQQxfPn5vcKOCZ8XpVSpHWRB0Vao/2//gQYgy7kzPUV3 VwzlGVY/X4w8xhLxJM2+89+2ypPTctRbdXmCbN1GPZvcUzJrauliABgFyGyn/taPiOJH KIoPqGBVDQSqeQgJ+AhXJCqF6snGA1/T/Q9nB0JywwU+VseHrmeF8mJazZPlB5anKDxh +HIg== X-Gm-Message-State: AOAM532h/TtzylKvxtWs5mi2YEqF5xCjYm5sG5gxt052f7UuMHzCa0+a umPFu7mvqhy2ONyPDRXWep85CQ== X-Google-Smtp-Source: ABdhPJzZXFapJWgWIfvKcJ3+/UdAj25+uaJRo93WQmS+BF8W09ylZz40b903EwBp/2EysM9KsYlwCw== X-Received: by 2002:a5d:61ca:: with SMTP id q10mr33297033wrv.124.1608026494688; Tue, 15 Dec 2020 02:01:34 -0800 (PST) Received: from phenom.ffwll.local ([2a02:168:57f4:0:efd0:b9e5:5ae6:c2fa]) by smtp.gmail.com with ESMTPSA id b14sm36489094wrx.77.2020.12.15.02.01.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 15 Dec 2020 02:01:33 -0800 (PST) Date: Tue, 15 Dec 2020 11:01:31 +0100 From: Daniel Vetter To: Guido =?iso-8859-1?Q?G=FCnther?= Subject: Re: [PATCH v1 1/1] drm: mxsfb: Silence -EPROBE_DEFER while waiting for bridge Message-ID: Mail-Followup-To: Guido =?iso-8859-1?Q?G=FCnther?= , Marek Vasut , Stefan Agner , David Airlie , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Emil Velikov , Laurent Pinchart , dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org References: MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: X-Operating-System: Linux phenom 5.7.0-1-amd64 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20201215_050137_179108_70648AB9 X-CRM114-Status: GOOD ( 23.14 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Marek Vasut , Pengutronix Kernel Team , dri-devel@lists.freedesktop.org, David Airlie , Fabio Estevam , Sascha Hauer , Emil Velikov , linux-kernel@vger.kernel.org, Stefan Agner , NXP Linux Team , Daniel Vetter , Shawn Guo , linux-arm-kernel@lists.infradead.org, Laurent Pinchart Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Dec 15, 2020 at 09:23:38AM +0100, Guido G=FCnther wrote: > It can take multiple iterations until all components for an attached DSI > bridge are up leading to several: > = > [ 3.796425] mxsfb 30320000.lcd-controller: Cannot connect bridge: -517 > [ 3.816952] mxsfb 30320000.lcd-controller: [drm:mxsfb_probe [mxsfb]] *= ERROR* failed to attach bridge: -517 > = > Silence this by checking for -EPROBE_DEFER and using dev_err_probe() so > we set a deferred reason in case a dependency fails to probe (which > quickly happens on small config/DT changes due to the rather long probe > chain which can include bridges, phys, panels, backights, leds, etc.). > = > This also removes the only DRM_DEV_ERROR() usage, the rest of the driver > uses dev_err(). > = > Signed-off-by: Guido G=FCnther > Fixes: c42001e357f7 ("drm: mxsfb: Use drm_panel_bridge") Queued up for 5.11, thanks for your patch. -Daniel > --- > drivers/gpu/drm/mxsfb/mxsfb_drv.c | 10 ++++------ > 1 file changed, 4 insertions(+), 6 deletions(-) > = > diff --git a/drivers/gpu/drm/mxsfb/mxsfb_drv.c b/drivers/gpu/drm/mxsfb/mx= sfb_drv.c > index 6faf17b6408d..6da93551e2e5 100644 > --- a/drivers/gpu/drm/mxsfb/mxsfb_drv.c > +++ b/drivers/gpu/drm/mxsfb/mxsfb_drv.c > @@ -134,11 +134,8 @@ static int mxsfb_attach_bridge(struct mxsfb_drm_priv= ate *mxsfb) > return -ENODEV; > = > ret =3D drm_bridge_attach(&mxsfb->encoder, bridge, NULL, 0); > - if (ret) { > - DRM_DEV_ERROR(drm->dev, > - "failed to attach bridge: %d\n", ret); > - return ret; > - } > + if (ret) > + return dev_err_probe(drm->dev, ret, "Failed to attach bridge\n"); > = > mxsfb->bridge =3D bridge; > = > @@ -212,7 +209,8 @@ static int mxsfb_load(struct drm_device *drm, > = > ret =3D mxsfb_attach_bridge(mxsfb); > if (ret) { > - dev_err(drm->dev, "Cannot connect bridge: %d\n", ret); > + if (ret !=3D -EPROBE_DEFER) > + dev_err(drm->dev, "Cannot connect bridge: %d\n", ret); > goto err_vblank; > } > = > -- = > 2.29.2 > = -- = Daniel Vetter Software Engineer, Intel Corporation http://blog.ffwll.ch _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel