linux-kernel - Re: [PATCH drm-dp 02/10] drm/hisilicon/hibmc: fix dp probabilistical detect errors after HPD irq

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Message-ID: <5e27739f-2cb1-4010-88b9-8908404f60ae@huawei.com>
Date: Tue, 10 Jun 2025 21:26:41 +0800
From: Yongbang Shi <shiyongbang@...wei.com>
To: Dmitry Baryshkov <dmitry.baryshkov@....qualcomm.com>
CC: <xinliang.liu@...aro.org>, <tiantao6@...ilicon.com>,
	<maarten.lankhorst@...ux.intel.com>, <mripard@...nel.org>,
	<tzimmermann@...e.de>, <airlied@...il.com>, <daniel@...ll.ch>,
	<kong.kongxinwei@...ilicon.com>, <liangjian010@...wei.com>,
	<chenjianmin@...wei.com>, <lidongming5@...wei.com>, <libaihan@...wei.com>,
	<shenjian15@...wei.com>, <shaojijie@...wei.com>,
	<jani.nikula@...ux.intel.com>, <dri-devel@...ts.freedesktop.org>,
	<linux-kernel@...r.kernel.org>, <shiyongbang@...wei.com>
Subject: Re: [PATCH drm-dp 02/10] drm/hisilicon/hibmc: fix dp probabilistical
 detect errors after HPD irq

>>
>>
>>>> +        if ((dp->irq_status & HIBMC_DP_MASKED_SINK_HPD_UNPLUG_INT)) {
>>>> +            drm_dbg_dp(dev, "HPD OUT isr occur.");
>>>> +            hibmc_dp_reset_link(dp);
>>>> +            dp->hpd_status = 0;
>>>> +            if (dev->registered)
>>>> + drm_connector_helper_hpd_irq_event(&dp->connector);
>>>> +        } else {
>>>> +            drm_warn(dev, "HPD OUT occurs, irq status err: %u", 
>>>> dp- >irq_status);
>>> These should be ratelimited.
>>
>> Sorry, I didn't get it. Do you mean I need print the link rate here?
>>
>
> No, I was thinking about drm_err_ratelimited() in case something gets 
> stuck in the hw.
>
Okay, I will try to use it.