linux-kernel - Re: [PATCH v1 2/2] This patch adds a new DRM bridge driver for the Lontium LT9611C chip.

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Message-ID: <CAFQXuNa0-_kLpoy9EE3rrQvPZj0XPaSp8F6u7wYZb8TEJ72hcQ@mail.gmail.com>
Date: Thu, 4 Sep 2025 19:17:12 +0800
From: 杨孙运 <yangsunyun1993@...il.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>, syyang <syyang@...tium.com>, 
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org, 
	andrzej.hajda@...el.com, neil.armstrong@...aro.org, rfoss@...nel.org, 
	Laurent.pinchart@...asonboard.com, jonas@...boo.se, jernej.skrabec@...il.com, 
	devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org, 
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/2] This patch adds a new DRM bridge driver for the
 Lontium LT9611C chip.

Krzysztof Kozlowski <krzk@...nel.org> 于2025年9月4日周四 19:04写道：
>
> On 04/09/2025 12:48, 杨孙运 wrote:
> >>> +
> >>> +static void lt9611c_cleanup_resources(struct lt9611c *lt9611c)
> >>> +{
> >>> +     struct device *dev = lt9611c->dev;
> >>> +
> >>> +     if (lt9611c->work_inited) {
> >>> +             cancel_work_sync(&lt9611c->work);
> >>> +             lt9611c->work_inited = false;
> >>> +             dev_err(dev, "work cancelled\n");
> >>
> >> Why???
> >>
> > ?? I don't understand.
>
> You need to explain why that line - printing error - should be here. And
> focus on "WHY" part.
>

I understand. Thks.

> >
> >>> +     }
> >>> +
> >>> +     if (lt9611c->bridge_added) {
> >>> +             drm_bridge_remove(&lt9611c->bridge);
> >>> +             lt9611c->bridge_added = false;
> >>> +             dev_err(dev, "DRM bridge removed\n");
> >>> +     }
> >>> +
> >>> +     if (lt9611c->regulators_enabled) {
> >>> +             regulator_bulk_disable(ARRAY_SIZE(lt9611c->supplies), lt9611c->supplies);
> >>> +             lt9611c->regulators_enabled = false;
> >>> +             dev_err(dev, "regulators disabled\n");
> >>> +     }
> >>> +
> >>> +     if (lt9611c->audio_pdev)
> >>> +             lt9611c_audio_exit(lt9611c);
> >>> +
> >>> +     if (lt9611c->fw) {
> >>
> >> You definitely don't need firmware when the bridge is up and running.
> >>
> > The previous text has already described the working logic of the firmware.
> >
> >>> +             release_firmware(lt9611c->fw);
> >>> +             lt9611c->fw = NULL;
> >>> +             dev_err(dev, "firmware released\n");
> >>> +     }
> >>> +
> >>> +     if (lt9611c->dsi0_node) {
> >>> +             of_node_put(lt9611c->dsi0_node);
> >>> +             lt9611c->dsi0_node = NULL;
> >>> +             dev_err(dev, "dsi0 node released\n");
>
> Your driver is way, way to noisy.
>
> Please read coding style - what does it say about driver being silent?
>

Thank you for your guidance.  I am learning how to make the driver silent.

>
> Best regards,
> Krzysztof