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

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Date:   Sun, 12 Dec 2021 15:57:09 +0000
From:   Vladimir Lypak <vladimir.lypak@...il.com>
To:     Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
Cc:     Bjorn Andersson <bjorn.andersson@...aro.org>,
        Rob Clark <robdclark@...il.com>, Sean Paul <sean@...rly.run>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Jordan Crouse <jordan@...micpenguin.net>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...ainline.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        "Kristian H. Kristensen" <hoegsberg@...gle.com>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        Akhil P Oommen <akhilpo@...eaurora.org>,
        Jonathan Marek <jonathan@...ek.ca>,
        Iskren Chernev <iskren.chernev@...il.com>,
        Sai Prakash Ranjan <saiprakash.ranjan@...eaurora.org>,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] drm/msm/a5xx: Add support for Adreno 506 GPU

On Fri, Dec 03, 2021 at 09:51:10PM +0300, Dmitry Baryshkov wrote:
> On 22/10/2021 20:33, 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@...il.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.
> 
> Vladimir, any plans to submit v2? This comment requests splitting the patch
> in two.
> 
> 
> -- 
> With best wishes
> Dmitry

Hello, Dmitry!
Sorry for delay. Yes, i'm going to submit v2 soon.

Thanks
Vladimir