Re: [PATCH] drm/msm/a5xx: Add support for Adreno 506 GPU

Vladimir Lypak
2021-12-12T14:50:30Z

On Fri, Oct 22, 2021 at 10:33:29AM -0700, Bjorn Andersson wrote:
> On Fri 22 Oct 04:43 PDT 2021, Vladimir Lypak wrote:
>
> > This GPU is found on SoCs such as MSM8953(650MHz), SDM450(600MHz),
> > SDM632(725MHz).
> >
> > Signed-off-by: Vladimir Lypak <vladimir.lypak@gmail.com>
> > ---
> > drivers/gpu/drm/msm/adreno/a5xx_gpu.c | 34 ++++++++++++++--------
> > drivers/gpu/drm/msm/adreno/adreno_device.c | 18 ++++++++++++
> > drivers/gpu/drm/msm/adreno/adreno_gpu.h | 5 ++++
> > 3 files changed, 45 insertions(+), 12 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> > index 5e2750eb3810..249a0d8bc673 100644
> > --- a/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> > +++ b/drivers/gpu/drm/msm/adreno/a5xx_gpu.c
> > @@ -441,7 +441,7 @@ void a5xx_set_hwcg(struct msm_gpu *gpu, bool state)
> > const struct adreno_five_hwcg_regs *regs;
> > unsigned int i, sz;
> >
> > - if (adreno_is_a508(adreno_gpu)) {
> > + if (adreno_is_a506(adreno_gpu) || adreno_is_a508(adreno_gpu)) {
> > regs = a50x_hwcg;
> > sz = ARRAY_SIZE(a50x_hwcg);
> > } else if (adreno_is_a509(adreno_gpu) || adreno_is_a512(adreno_gpu)) {
> > @@ -485,7 +485,7 @@ static int a5xx_me_init(struct msm_gpu *gpu)
> > OUT_RING(ring, 0x00000000);
> >
> > /* Specify workarounds for various microcode issues */
> > - if (adreno_is_a530(adreno_gpu)) {
> > + if (adreno_is_a506(adreno_gpu) || adreno_is_a530(adreno_gpu)) {
> > /* Workaround for token end syncs
> > * Force a WFI after every direct-render 3D mode draw and every
> > * 2D mode 3 draw
> > @@ -620,8 +620,17 @@ static int a5xx_ucode_init(struct msm_gpu *gpu)
> >
> > static int a5xx_zap_shader_resume(struct msm_gpu *gpu)
> > {
> > + struct adreno_gpu *adreno_gpu = to_adreno_gpu(gpu);
> > int ret;
> >
> > + /*
> > + * Adreno 506,508,512 have CPZ Retention feature and
> > + * don't need to resume zap shader
> > + */
> > + if (adreno_is_a506(adreno_gpu) || adreno_is_a508(adreno_gpu) ||
> > + adreno_is_a512(adreno_gpu))
> > + return 0;
>
> Afaict all other changes in the patch adds a506 support, but this hunk
> changes a508 and a512 behavior.
>
> I'm not saying that the change is wrong, but this hunk deserves to be in
> it's own patch - so that if there's any impact on those other versions
> it can be tracked down to that specific patch.
>
> Thanks,
> Bjorn

Hello, Bjorn.

You're right on that. I'm going to remove those changes in V2, since
that SCM call only causes problems on A506 and i can't test it on other
GPUs.

Best regards,
Vladimir