linux-kernel - Re: [PATCH v2 2/3] drm/msm/a6xx: Use rev to identify SKU

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <CAF6AEGtypTgeCdo_yzywEVyzEUG1H_w_r_29dS9MYRpSNvit8Q@mail.gmail.com>
Date:   Thu, 29 Jul 2021 08:47:09 -0700
From:   Rob Clark <robdclark@...il.com>
To:     Akhil P Oommen <akhilpo@...eaurora.org>
Cc:     Sean Paul <sean@...rly.run>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        David Airlie <airlied@...ux.ie>,
        linux-arm-msm <linux-arm-msm@...r.kernel.org>,
        Sharat Masetty <smasetty@...eaurora.org>,
        Douglas Anderson <dianders@...omium.org>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Jordan Crouse <jordan@...micpenguin.net>,
        Matthias Kaehlcke <mka@...omium.org>,
        freedreno <freedreno@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] drm/msm/a6xx: Use rev to identify SKU

On Thu, Jul 29, 2021 at 8:36 AM Akhil P Oommen <akhilpo@...eaurora.org> wrote:
>
> On 7/29/2021 8:57 PM, Rob Clark wrote:
> > On Thu, Jul 29, 2021 at 7:33 AM Akhil P Oommen <akhilpo@...eaurora.org> wrote:
> >>
> >> Use rev instead of revn to identify the SKU. This is in
> >> preparation to the introduction of 7c3 gpu which won't have a
> >> revn.
> >>
> >> Signed-off-by: Akhil P Oommen <akhilpo@...eaurora.org>
> >> ---
> >>
> >> (no changes since v1)
> >>
> >>   drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 11 +++++------
> >>   1 file changed, 5 insertions(+), 6 deletions(-)
> >>
> >> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> >> index 183b9f9..0da1a66 100644
> >> --- a/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> >> +++ b/drivers/gpu/drm/msm/adreno/a6xx_gpu.c
> >> @@ -1675,11 +1675,11 @@ static u32 a618_get_speed_bin(u32 fuse)
> >>          return UINT_MAX;
> >>   }
> >>
> >> -static u32 fuse_to_supp_hw(struct device *dev, u32 revn, u32 fuse)
> >> +static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
> >>   {
> >>          u32 val = UINT_MAX;
> >>
> >> -       if (revn == 618)
> >> +       if (adreno_cmp_rev(ADRENO_REV(6, 1, 8, ANY_ID), rev))
> >
> > Looks like adreno_cmp_rev() ended up in patch 3/3 when it should have
> > been in this patch..
> >
> > But I guess we could also move this into adreno_is_a618() and use that here
> >
> > BR,
> > -R
> Ahh! I reordered the patches. This is too early in the probe sequence to
> call adreno_is_axxx(), right?

ahh, right, I guess you do still need to open code adreno_cmp_rev()
here.. but you can at least move adreno_cmp_rev() into this patch.

BR,
-R

>
> -Akhil.
> >
> >>                  val = a618_get_speed_bin(fuse);
> >>
> >>          if (val == UINT_MAX) {
> >> @@ -1692,8 +1692,7 @@ static u32 fuse_to_supp_hw(struct device *dev, u32 revn, u32 fuse)
> >>          return (1 << val);
> >>   }
> >>
> >> -static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
> >> -               u32 revn)
> >> +static int a6xx_set_supported_hw(struct device *dev, struct adreno_rev rev)
> >>   {
> >>          u32 supp_hw = UINT_MAX;
> >>          u16 speedbin;
> >> @@ -1714,7 +1713,7 @@ static int a6xx_set_supported_hw(struct device *dev, struct a6xx_gpu *a6xx_gpu,
> >>          }
> >>          speedbin = le16_to_cpu(speedbin);
> >>
> >> -       supp_hw = fuse_to_supp_hw(dev, revn, speedbin);
> >> +       supp_hw = fuse_to_supp_hw(dev, rev, speedbin);
> >>
> >>   done:
> >>          ret = devm_pm_opp_set_supported_hw(dev, &supp_hw, 1);
> >> @@ -1785,7 +1784,7 @@ struct msm_gpu *a6xx_gpu_init(struct drm_device *dev)
> >>
> >>          a6xx_llc_slices_init(pdev, a6xx_gpu);
> >>
> >> -       ret = a6xx_set_supported_hw(&pdev->dev, a6xx_gpu, info->revn);
> >> +       ret = a6xx_set_supported_hw(&pdev->dev, config->rev);
> >>          if (ret) {
> >>                  a6xx_destroy(&(a6xx_gpu->base.base));
> >>                  return ERR_PTR(ret);
> >> --
> >> QUALCOMM INDIA, on behalf of Qualcomm Innovation Center, Inc. is a member
> >> of Code Aurora Forum, hosted by The Linux Foundation.
> >>
>