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Message-ID: <227f45fd532a13d3bd636ff2330d87a252383fa6.camel@redhat.com>
Date: Fri, 22 Nov 2024 14:59:18 -0500
From: Lyude Paul <lyude@...hat.com>
To: "Dr. David Alan Gilbert" <linux@...blig.org>, kherbst@...hat.com, 
	dakr@...hat.com, bskeggs@...dia.com
Cc: airlied@...il.com, simona@...ll.ch, dri-devel@...ts.freedesktop.org, 
	nouveau@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] nouveau: Remove unused functions

Thanks for the ping! The patch looks fine to me but I'm not sure if we would
want to remove something like this, or just comment it out with #if 0. Ben, do
you have any particular feelings on this?

On Fri, 2024-11-22 at 02:02 +0000, Dr. David Alan Gilbert wrote:
> * linux@...blig.org (linux@...blig.org) wrote:
> > From: "Dr. David Alan Gilbert" <linux@...blig.org>
> > 
> > dcb_outp_match() last use was removed in 2017 in
> > commit 99a845a30f62 ("drm/nouveau/disp/nv50-gt21x: remove workaround for
> > dp->tmds hotplug issues")
> > 
> > dcb_xpio_parse was added in 2012 in
> > commit 112a12aab8a5 ("drm/nouveau/bios: add support for parsing xpio table
> > data")
> > but never used.
> > 
> > Remove them.
> > 
> > dcb_xpio_parse was the last user of struct nvbios_xpio, so remove it
> > as well and the FLAG #defines.
> > 
> > Signed-off-by: Dr. David Alan Gilbert <linux@...blig.org>
> 
> Ping.
> 
> Thanks,
> 
> Dave
> 
> > ---
> >  .../gpu/drm/nouveau/include/nvkm/subdev/bios/dcb.h |  2 --
> >  .../drm/nouveau/include/nvkm/subdev/bios/xpio.h    | 12 ------------
> >  drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c     | 14 --------------
> >  drivers/gpu/drm/nouveau/nvkm/subdev/bios/xpio.c    | 13 -------------
> >  4 files changed, 41 deletions(-)
> > 
> > diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/dcb.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/dcb.h
> > index 73f9d9947e7e..12e6b2f21564 100644
> > --- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/dcb.h
> > +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/dcb.h
> > @@ -61,8 +61,6 @@ u16 dcb_table(struct nvkm_bios *, u8 *ver, u8 *hdr, u8 *ent, u8 *len);
> >  u16 dcb_outp(struct nvkm_bios *, u8 idx, u8 *ver, u8 *len);
> >  u16 dcb_outp_parse(struct nvkm_bios *, u8 idx, u8 *, u8 *,
> >  		   struct dcb_output *);
> > -u16 dcb_outp_match(struct nvkm_bios *, u16 type, u16 mask, u8 *, u8 *,
> > -		   struct dcb_output *);
> >  int dcb_outp_foreach(struct nvkm_bios *, void *data, int (*exec)
> >  		     (struct nvkm_bios *, void *, int index, u16 entry));
> >  #endif
> > diff --git a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/xpio.h b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/xpio.h
> > index 11b4c4d27e5f..cd0ffebcb73a 100644
> > --- a/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/xpio.h
> > +++ b/drivers/gpu/drm/nouveau/include/nvkm/subdev/bios/xpio.h
> > @@ -2,18 +2,6 @@
> >  #ifndef __NVBIOS_XPIO_H__
> >  #define __NVBIOS_XPIO_H__
> >  
> > -#define NVBIOS_XPIO_FLAG_AUX  0x10
> > -#define NVBIOS_XPIO_FLAG_AUX0 0x00
> > -#define NVBIOS_XPIO_FLAG_AUX1 0x10
> > -
> > -struct nvbios_xpio {
> > -	u8 type;
> > -	u8 addr;
> > -	u8 flags;
> > -};
> > -
> >  u16 dcb_xpio_table(struct nvkm_bios *, u8 idx,
> >  		   u8 *ver, u8 *hdr, u8 *cnt, u8 *len);
> > -u16 dcb_xpio_parse(struct nvkm_bios *, u8 idx,
> > -		   u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_xpio *);
> >  #endif
> > diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c
> > index 8698f260b988..ae1faa63d68f 100644
> > --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c
> > +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/dcb.c
> > @@ -193,20 +193,6 @@ dcb_outp_parse(struct nvkm_bios *bios, u8 idx, u8 *ver, u8 *len,
> >  	return dcb;
> >  }
> >  
> > -u16
> > -dcb_outp_match(struct nvkm_bios *bios, u16 type, u16 mask,
> > -	       u8 *ver, u8 *len, struct dcb_output *outp)
> > -{
> > -	u16 dcb, idx = 0;
> > -	while ((dcb = dcb_outp_parse(bios, idx++, ver, len, outp))) {
> > -		if ((dcb_outp_hasht(outp) & 0x00ff) == (type & 0x00ff)) {
> > -			if ((dcb_outp_hashm(outp) & mask) == mask)
> > -				break;
> > -		}
> > -	}
> > -	return dcb;
> > -}
> > -
> >  int
> >  dcb_outp_foreach(struct nvkm_bios *bios, void *data,
> >  		 int (*exec)(struct nvkm_bios *, void *, int, u16))
> > diff --git a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/xpio.c b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/xpio.c
> > index 250fc42d8608..a47393e90de9 100644
> > --- a/drivers/gpu/drm/nouveau/nvkm/subdev/bios/xpio.c
> > +++ b/drivers/gpu/drm/nouveau/nvkm/subdev/bios/xpio.c
> > @@ -59,16 +59,3 @@ dcb_xpio_table(struct nvkm_bios *bios, u8 idx,
> >  	}
> >  	return 0x0000;
> >  }
> > -
> > -u16
> > -dcb_xpio_parse(struct nvkm_bios *bios, u8 idx,
> > -	       u8 *ver, u8 *hdr, u8 *cnt, u8 *len, struct nvbios_xpio *info)
> > -{
> > -	u16 data = dcb_xpio_table(bios, idx, ver, hdr, cnt, len);
> > -	if (data && *len >= 6) {
> > -		info->type = nvbios_rd08(bios, data + 0x04);
> > -		info->addr = nvbios_rd08(bios, data + 0x05);
> > -		info->flags = nvbios_rd08(bios, data + 0x06);
> > -	}
> > -	return 0x0000;
> > -}
> > -- 
> > 2.47.0
> > 

-- 
Cheers,
 Lyude Paul (she/her)
 Software Engineer at Red Hat

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