linux-kernel - Re: [PATCH] media: mediatek: vcodec: support 36bit physical address

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Message-ID: <c1f489c474e3d00ff8573225c5d282df4d82f9e1.camel@mediatek.com>
Date: Fri, 1 Mar 2024 09:23:59 +0000
From: Yunfei Dong (董云飞) <Yunfei.Dong@...iatek.com>
To: "nhebert@...omium.org" <nhebert@...omium.org>,
	"benjamin.gaignard@...labora.com" <benjamin.gaignard@...labora.com>,
	"nfraprado@...labora.com" <nfraprado@...labora.com>,
	"angelogioacchino.delregno@...labora.com"
	<angelogioacchino.delregno@...labora.com>, "nicolas.dufresne@...labora.com"
	<nicolas.dufresne@...labora.com>, "hverkuil-cisco@...all.nl"
	<hverkuil-cisco@...all.nl>
CC: "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-mediatek@...ts.infradead.org" <linux-mediatek@...ts.infradead.org>,
	"frkoenig@...omium.org" <frkoenig@...omium.org>, "stevecho@...omium.org"
	<stevecho@...omium.org>, "linux-media@...r.kernel.org"
	<linux-media@...r.kernel.org>, "devicetree@...r.kernel.org"
	<devicetree@...r.kernel.org>, "daniel@...ll.ch" <daniel@...ll.ch>,
	Project_Global_Chrome_Upstream_Group
	<Project_Global_Chrome_Upstream_Group@...iatek.com>, "hsinyi@...omium.org"
	<hsinyi@...omium.org>, "linux-arm-kernel@...ts.infradead.org"
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH] media: mediatek: vcodec: support 36bit physical address

Hi AngeloGioacchino,

Thanks for you reviewing.
On Fri, 2024-03-01 at 10:03 +0100, AngeloGioacchino Del Regno wrote:
> Il 01/03/24 03:01, Yunfei Dong ha scritto:
> > The physical address is beyond 32bit for mt8188 platform, need
> > to change the type from unsigned int to unsigned long in case of
> > the high bit missing.
> > 
> > Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> > ---
> >   .../mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c        | 4
> > ++--
> >   1 file changed, 2 insertions(+), 2 deletions(-)
> > 
> > diff --git
> > a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_
> > lat_if.c
> > b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_
> > lat_if.c
> > index cf48d09b78d7..85df3e7c2983 100644
> > ---
> > a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_
> > lat_if.c
> > +++
> > b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_
> > lat_if.c
> > @@ -1074,7 +1074,7 @@ static int
> > vdec_vp9_slice_setup_tile_buffer(struct vdec_vp9_slice_instance
> > *inst
> >   	unsigned int mi_row;
> >   	unsigned int mi_col;
> >   	unsigned int offset;
> > -	unsigned int pa;
> > +	unsigned long pa;
> 
> If you used the right type from the beginning, you wouldn't have to
> fix that ;-)
> 
Yes, you are right, thanks for your remind.
> Is there any reason why you didn't - and still don't use the
> `phys_addr_t` type
> for the `pa` member?
> 
pa is also iova, dma address. Change it to dma_addr_t looks much
better.

I will change it in next patch.
> Cheers,
> Angelo
> 
Best Regards,
Yunfei Dong
> >   	unsigned int size;
> >   	struct vdec_vp9_slice_tiles *tiles;
> >   	unsigned char *pos;
> > @@ -1109,7 +1109,7 @@ static int
> > vdec_vp9_slice_setup_tile_buffer(struct vdec_vp9_slice_instance
> > *inst
> >   	pos = va + offset;
> >   	end = va + bs->size;
> >   	/* truncated */
> > -	pa = (unsigned int)bs->dma_addr + offset;
> > +	pa = (unsigned long)bs->dma_addr + offset;
> >   	tb = instance->tile.va;
> >   	for (i = 0; i < rows; i++) {
> >   		for (j = 0; j < cols; j++) {
> 
>