Re: [Freedreno] [PATCH v2 04/17] drm/msm/dpu: Fix PP_BLK_DIPHER -> DITHER typo

[Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>]

On 4/24/2023 11:54 PM, Marijn Suijten wrote:
> On 2023-04-24 16:09:45, Abhinav Kumar wrote:
> <snip>
> > > > dither block should be present on many other chipsets too but looks like
> > > > on sm8550 was enabling it. Not sure how it was validated there. But we
> > > > are enabling dither, even other chipsets have this block.
> > >
> > > Correct, they all seem to have it starting at sdm845.  My patch message
> > > seems to lack the word "exclusively" as the PP on sm8550 appears to
> > > exclusively contain a DITHER subblock (unless other blocks are available
> > > that simply aren't supported within this driver yet) and no other
> > > registers.  Hence this aptly named macro exist to emit just the feature
> > > bitflag for that and a .len of zero.
> >
> > I think after the TE blocks were moved to INTF, dither is the only
> > sub-block for all Ping-Pongs not just in sm8550.
>
> So you are asking / leaving context to make all >= 5.0.0 pingpong blocks
> use this macro with only a single DITHER sblk in PP?
>
> As far as I recall SM8550 is the first SoC to use zero registers in PP,
> which is specifically what this macro takes care of too.  Then, there
> are only a few SoCs downstream still (erroneously?) referencing TE2 as
> the only other sub-blk, those SoCs still use sdm845_pp_sblk_te.

So, what I didnt follow is why should sm8450 use PP_BLK_TE Vs sm8550 
should use PP_BLK_DIPHER?

Atleast for those two, both should be using PP_BLK_DIPHER.

Thats what I was trying to note here.

This isnt even right as there is no PP_BLK_TE in sm8450.

> > > Now, whether we should have the features contain subblock flags rather
> > > than just scanning for their id's or presence in the subblocks is a
> > > different discussion / cleanup we should have.
> >
> > Yes, separate patch and hence I gave R-b on this one. But had to leave
> > this comment to not lose context.
>
> Fwiw this is a different suggestion: we already have these flags in the
> sub-block `.id` field so there seems to be no reason to duplicate info
> in the top-level `.features` field, deduplicating some info and
> simplifying some defines.
>
> - Marijn
>
> > > - Marijn
> > >
> > > > > -	PP_BLK_DIPHER("pingpong_0", PINGPONG_0, 0x69000, MERGE_3D_0, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_0", PINGPONG_0, 0x69000, MERGE_3D_0, sc7280_pp_sblk,
> > > > >     			DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 8),
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_1", PINGPONG_1, 0x6a000, MERGE_3D_0, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_1", PINGPONG_1, 0x6a000, MERGE_3D_0, sc7280_pp_sblk,
> > > > >     			DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 9),
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_2", PINGPONG_2, 0x6b000, MERGE_3D_1, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_2", PINGPONG_2, 0x6b000, MERGE_3D_1, sc7280_pp_sblk,
> > > > >     			DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 10),
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_3", PINGPONG_3, 0x6c000, MERGE_3D_1, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_3", PINGPONG_3, 0x6c000, MERGE_3D_1, sc7280_pp_sblk,
> > > > >     			DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR, 11),
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_4", PINGPONG_4, 0x6d000, MERGE_3D_2, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_4", PINGPONG_4, 0x6d000, MERGE_3D_2, sc7280_pp_sblk,
> > > > >     			DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR2, 30),
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_5", PINGPONG_5, 0x6e000, MERGE_3D_2, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_5", PINGPONG_5, 0x6e000, MERGE_3D_2, sc7280_pp_sblk,
> > > > >     			DPU_IRQ_IDX(MDP_SSPP_TOP0_INTR2, 31),
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_6", PINGPONG_6, 0x66000, MERGE_3D_3, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_6", PINGPONG_6, 0x66000, MERGE_3D_3, sc7280_pp_sblk,
> > > > >     			-1,
> > > > >     			-1),
> > > > > -	PP_BLK_DIPHER("pingpong_7", PINGPONG_7, 0x66400, MERGE_3D_3, sc7280_pp_sblk,
> > > > > +	PP_BLK_DITHER("pingpong_7", PINGPONG_7, 0x66400, MERGE_3D_3, sc7280_pp_sblk,
> > > > >     			-1,
> > > > >     			-1),
> > > > >     };
> > > > > diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> > > > > index 03f162af1a50..ca8a02debda9 100644
> > > > > --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> > > > > +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> > > > > @@ -491,7 +491,7 @@ static const struct dpu_pingpong_sub_blks sc7280_pp_sblk = {
> > > > >     	.len = 0x20, .version = 0x20000},
> > > > >     };
> > > > >     
> > > > > -#define PP_BLK_DIPHER(_name, _id, _base, _merge_3d, _sblk, _done, _rdptr) \
> > > > > +#define PP_BLK_DITHER(_name, _id, _base, _merge_3d, _sblk, _done, _rdptr) \
> > > > >     	{\
> > > > >     	.name = _name, .id = _id, \
> > > > >     	.base = _base, .len = 0, \