linux-kernel - Re: [PATCH v2 05/16] drm/msm/dpu: add cdm blocks to sc7280 dpu_hw

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Message-ID: <CAA8EJpqu42b0AP8Ar2LoFcrS51iKTUM1Qr++j7MYjv4WCx=tCg@mail.gmail.com>
Date:   Mon, 11 Dec 2023 23:31:08 +0200
From:   Dmitry Baryshkov <dmitry.baryshkov@...aro.org>
To:     Abhinav Kumar <quic_abhinavk@...cinc.com>
Cc:     freedreno@...ts.freedesktop.org, Rob Clark <robdclark@...il.com>,
        Sean Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org, quic_jesszhan@...cinc.com,
        quic_parellan@...cinc.com, linux-arm-msm@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 05/16] drm/msm/dpu: add cdm blocks to sc7280 dpu_hw_catalog

On Mon, 11 Dec 2023 at 23:16, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
>
>
> On 12/8/2023 3:19 AM, Dmitry Baryshkov wrote:
> > On Fri, 8 Dec 2023 at 07:07, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
> >>
> >> Add CDM blocks to the sc7280 dpu_hw_catalog to support
> >> YUV format output from writeback block.
> >>
> >> changes in v2:
> >>          - remove explicit zero assignment for features
> >>          - move sc7280_cdm to dpu_hw_catalog from the sc7280
> >>            catalog file as its definition can be re-used
> >>
> >> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> >> ---
> >>   .../gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h  |  1 +
> >>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c      | 10 ++++++++++
> >>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h      | 13 +++++++++++++
> >>   drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h         |  5 +++++
> >>   4 files changed, 29 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h
> >> index 209675de6742..19c2b7454796 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/catalog/dpu_7_2_sc7280.h
> >> @@ -248,6 +248,7 @@ const struct dpu_mdss_cfg dpu_sc7280_cfg = {
> >>          .mdss_ver = &sc7280_mdss_ver,
> >>          .caps = &sc7280_dpu_caps,
> >>          .mdp = &sc7280_mdp,
> >> +       .cdm = &sc7280_cdm,
> >>          .ctl_count = ARRAY_SIZE(sc7280_ctl),
> >>          .ctl = sc7280_ctl,
> >>          .sspp_count = ARRAY_SIZE(sc7280_sspp),
> >> 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 d52aae54bbd5..1be3156cde05 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.c
> >> @@ -426,6 +426,16 @@ static const struct dpu_dsc_sub_blks dsc_sblk_1 = {
> >>          .ctl = {.name = "ctl", .base = 0xF80, .len = 0x10},
> >>   };
> >>
> >> +/*************************************************************
> >> + * CDM sub block config
> >
> > Nit: it is not a subblock config.
> >
>
> Ack.
>
> >> + *************************************************************/
> >> +static const struct dpu_cdm_cfg sc7280_cdm = {
> >
> > I know that I have r-b'ed this patch. But then one thing occurred to
> > me. If this definition is common to all (or almost all) platforms, can
> > we just call it dpu_cdm or dpu_common_cdm?
> >
> >> +       .name = "cdm_0",
> >> +       .id = CDM_0,
> >> +       .len = 0x228,
> >> +       .base = 0x79200,
> >> +};
>
> hmmm .... almost common but not entirely ... msm8998's CDM has a shorter
> len of 0x224 :(

Then sdm845_cdm?

>
> >> +
> >>   /*************************************************************
> >>    * VBIF sub blocks config
> >>    *************************************************************/
> >> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> >> index e3c0d007481b..ba82ef4560a6 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_catalog.h
> >> @@ -682,6 +682,17 @@ struct dpu_vbif_cfg {
> >>          u32 memtype[MAX_XIN_COUNT];
> >>   };
> >>
> >> +/**
> >> + * struct dpu_cdm_cfg - information of chroma down blocks
> >> + * @name               string name for debug purposes
> >> + * @id                 enum identifying this block
> >> + * @base               register offset of this block
> >> + * @features           bit mask identifying sub-blocks/features
> >> + */
> >> +struct dpu_cdm_cfg {
> >> +       DPU_HW_BLK_INFO;
> >> +};
> >> +
> >>   /**
> >>    * Define CDP use cases
> >>    * @DPU_PERF_CDP_UDAGE_RT: real-time use cases
> >> @@ -805,6 +816,8 @@ struct dpu_mdss_cfg {
> >>          u32 wb_count;
> >>          const struct dpu_wb_cfg *wb;
> >>
> >> +       const struct dpu_cdm_cfg *cdm;
> >> +
> >>          u32 ad_count;
> >>
> >>          u32 dspp_count;
> >> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
> >> index a6702b2bfc68..f319c8232ea5 100644
> >> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
> >> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_mdss.h
> >> @@ -185,6 +185,11 @@ enum dpu_dsc {
> >>          DSC_MAX
> >>   };
> >>
> >> +enum dpu_cdm {
> >> +       CDM_0 = 1,
> >> +       CDM_MAX
> >> +};
> >> +
> >>   enum dpu_pingpong {
> >>          PINGPONG_NONE,
> >>          PINGPONG_0,
> >> --
> >> 2.40.1
> >>
> >
> >



-- 
With best wishes
Dmitry