linux-kernel - Re: [PATCH] Revert "drm/mipi-dsi: Set the fwnode for mipi_dsi

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Message-ID: <ddc5f179dfa8445e2b25ae0c6e382550d45bbbd3.camel@mediatek.com>
Date: Mon, 28 Oct 2024 02:38:49 +0000
From: Jason-JH Lin (林睿祥) <Jason-JH.Lin@...iatek.com>
To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"saravanak@...gle.com" <saravanak@...gle.com>, "stable@...r.kernel.org"
	<stable@...r.kernel.org>, Seiya Wang (王迺君)
	<seiya.wang@...iatek.com>, Singo Chang (張興國)
	<Singo.Chang@...iatek.com>
Subject: Re: [PATCH] Revert "drm/mipi-dsi: Set the fwnode for mipi_dsi_device"

On Thu, 2024-10-24 at 12:23 +0200, gregkh@...uxfoundation.org wrote:
>  	 
> External email : Please do not click links or open attachments until
> you have verified the sender or the content.
>  On Thu, Oct 24, 2024 at 10:16:05AM +0000, Jason-JH Lin (林睿祥) wrote:
> > Hi Greg,
> > 
> > Thanks for your information.
> > 
> > On Thu, 2024-10-24 at 11:47 +0200, Greg KH wrote:
> > >   
> > > External email : Please do not click links or open attachments
> until
> > > you have verified the sender or the content.
> > >  On Thu, Oct 24, 2024 at 05:37:13PM +0800, Jason-JH.Lin via B4
> Relay
> > > wrote:
> > > > From: "Jason-JH.Lin" <jason-jh.lin@...iatek.com>
> > > > 
> > > > This reverts commit ac88a1f41f93499df6f50fd18ea835e6ff4f3200.
> > > > 
> > > > Reason for revert:
> > > > 1. The commit [1] does not land on linux-5.15, so this patch
> does
> > > not
> > > > fix anything.
> > > > 
> > > > 2. Since the fw_device improvements series [2] does not land on
> > > > linux-5.15, using device_set_fwnode() causes the panel to flash
> > > during
> > > > bootup.
> > > > 
> > > > Incorrect link management may lead to incorrect device
> > > initialization,
> > > > affecting firmware node links and consumer relationships.
> > > > The fwnode setting of panel to the DSI device would cause a DSI
> > > > initialization error without series[2], so this patch was
> reverted
> > > to
> > > > avoid using the incomplete fw_devlink functionality.
> > > > 
> > > > [1] commit 3fb16866b51d ("driver core: fw_devlink: Make cycle
> > > detection more robust")
> > > > [2] Link: 
> > > 
> https://lore.kernel.org/all/20230207014207.1678715-1-saravanak@google.com
> > > > 
> > 
> > Please don't mind me make a confirmation.
> > I just need to add this line here and send it again, right?
> > 
> > Cc: <stable@...r.kernel.org> #5.15.169
> 
> Yes.

Hi Greg,

Thanks for your confirmation!

I've sent the patch again without adding `v2` after the [PATCH]:
https://lore.kernel.org/all/20241024-fixup-5-15-v1-1-62f21a32b5a5@mediatek.com
Would that be fine with you?

Regards,
Jason-JH.Lin