linux-kernel - RE: [PATCH] drm/fbdev-dma: fix getting smem

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Date: Tue, 11 Jun 2024 01:00:27 +0000
From: Peng Fan <peng.fan@....com>
To: Thomas Zimmermann <tzimmermann@...e.de>, "Peng Fan (OSS)"
	<peng.fan@....nxp.com>, Maarten Lankhorst
	<maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>,
	David Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>, Javier
 Martinez Canillas <javierm@...hat.com>
CC: "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH] drm/fbdev-dma: fix getting smem_start

> Subject: Re: [PATCH] drm/fbdev-dma: fix getting smem_start
> 
> Hi
> 
> Am 04.06.24 um 10:03 schrieb Peng Fan (OSS):
> > From: Peng Fan <peng.fan@....com>
> >
> > If 'info->screen_buffer' locates in vmalloc address space,
> > virt_to_page will not be able to get correct results. With
> > CONFIG_DEBUG_VM and CONFIG_DEBUG_VIRTUAL enabled on ARM64,
> there is dump below:
> 
> Which graphics driver triggers this bug?

It is NXP i.MX95 DPU driver which is still in NXP downstream repo.

Thanks,
Peng.