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

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Message-ID: <CAA8EJprR92=TRvYNu1dSTUcphUu3v-cD326AK2+80Ex8ppYBBw@mail.gmail.com>
Date:   Fri, 8 Dec 2023 13:19:58 +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 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.

> + *************************************************************/
> +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,
> +};
> +
>  /*************************************************************
>   * 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