linux-kernel - Re: [PATCH v7 drm-dp 5/9] drm/hisilicon/hibmc: Getting connector info and EDID by using AUX channel

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Message-ID: <87pli14fgh.fsf@intel.com>
Date: Fri, 28 Mar 2025 12:28:14 +0200
From: Jani Nikula <jani.nikula@...ux.intel.com>
To: Yongbang Shi <shiyongbang@...wei.com>, 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
Cc: liangjian010@...wei.com, chenjianmin@...wei.com, lidongming5@...wei.com,
 libaihan@...wei.com, shenjian15@...wei.com, shaojijie@...wei.com,
 dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org,
 shiyongbang@...wei.com
Subject: Re: [PATCH v7 drm-dp 5/9] drm/hisilicon/hibmc: Getting connector
 info and EDID by using AUX channel

On Fri, 28 Mar 2025, Yongbang Shi <shiyongbang@...wei.com> wrote:
>> On Thu, 27 Mar 2025, Yongbang Shi <shiyongbang@...wei.com> wrote:
>>> 在 2025/3/26 17:32, Jani Nikula 写道:
>>>> On Tue, 25 Mar 2025, Yongbang Shi <shiyongbang@...wei.com> wrote:
>>>>>> On Mon, 24 Mar 2025, Yongbang Shi <shiyongbang@...wei.com> wrote:
>>>>>>>> On Wed, 19 Mar 2025, Yongbang Shi <shiyongbang@...wei.com> wrote:
>>>>>>>>> From: Baihan Li <libaihan@...wei.com>
>>>>>>>>>
>>>>>>>>> Add registering drm_aux and use it to get connector edid with drm
>>>>>>>>> functions. Add ddc channel in connector initialization to put drm_aux
>>>>>>>>> in drm_connector.
>>>>>>>>>
>>>>>>>>> Signed-off-by: Baihan Li <libaihan@...wei.com>
>>>>>>>>> Signed-off-by: Yongbang Shi <shiyongbang@...wei.com>
>>>>>>>>> Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
>>>>>>>>> ---
>>>>>>>>> ChangeLog:
>>>>>>>>> v6 -> v7:
>>>>>>>>>       - add if statement about drm aux in hibmc_dp_connector_get_modes(), suggested by Jani Nikula
>>>>>>>> I don't understand this, and I did not suggest such a thing.
>>>>>>>>
>>>>>>>> BR,
>>>>>>>> Jani.
>>>>>>>>
>>>>>>> Hi Jani,
>>>>>>>
>>>>>>> Is the modification of v8 correct?
>>>>>> I never received that for whatever reason.
>>>>> Here's the link: https://lore.kernel.org/all/20250320101455.2538835-1-shiyongbang@huawei.com/
>>>> Thanks.
>>>>
>>>> The EDID handling looks fine.
>>>>
>>>> AFAICT you leak dp->aux.name though.
>>>>
>>>>
>>>> BR,
>>>> Jani.
>>> Thanks for for reminding me, actually the dp->aux.name was written because I misunderstood what you meant in V7,
>>> and I deleted it in V8.
>> This is in the link you posted:
>>
>> +	dp->aux.name = kasprintf(GFP_KERNEL, "HIBMC DRM dp aux");
>>
> Hi Jani,
>
> I got it. I think I can change it to devm_kasprintf() in next bug fix patch, is that ok?

Maybe. I don't have the time to look into hibmc details.

BR,
Jani.


>
>
>>
>>> Thanks,
>>> Baihan.
>>>
>>>>

-- 
Jani Nikula, Intel