linux-kernel - Re: [PATCH 10/16] drm/msm/dpu: add support to disable CDM block during encoder cleanup

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Message-ID: <CAA8EJpoUDjTEytGnx0NUKD_grY=azoXgm_sqwNBJVTD7LwCe0g@mail.gmail.com>
Date:   Thu, 31 Aug 2023 03:14:02 +0300
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, quic_khsieh@...cinc.com,
        linux-arm-msm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/16] drm/msm/dpu: add support to disable CDM block
 during encoder cleanup

On Thu, 31 Aug 2023 at 01:50, Abhinav Kumar <quic_abhinavk@...cinc.com> wrote:
>
> In preparation of setting up CDM block, add the logic to disable it
> properly during encoder cleanup.
>
> Signed-off-by: Abhinav Kumar <quic_abhinavk@...cinc.com>
> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c      | 8 ++++++++
>  drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 2 ++
>  2 files changed, 10 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 582680804016..1b1e07292a9e 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -26,6 +26,7 @@
>  #include "dpu_hw_dspp.h"
>  #include "dpu_hw_dsc.h"
>  #include "dpu_hw_merge3d.h"
> +#include "dpu_hw_cdm.h"
>  #include "dpu_formats.h"
>  #include "dpu_encoder_phys.h"
>  #include "dpu_crtc.h"
> @@ -2097,6 +2098,13 @@ void dpu_encoder_helper_phys_cleanup(struct dpu_encoder_phys *phys_enc)
>                                         phys_enc->hw_pp->merge_3d->idx);
>         }
>
> +       if (phys_enc->hw_cdm && phys_enc->hw_cdm->ops.bind_pingpong_blk && phys_enc->hw_pp) {
> +               phys_enc->hw_cdm->ops.bind_pingpong_blk(phys_enc->hw_cdm,
> +                                                       false, phys_enc->hw_pp->idx);

But it was already bound in the cdm->enable, wasn't it?

Also the update_pending_flush_cdm should be called even for DPU < 5.0,
where there should be no bind_pingpong_blk callback.

> +               if (phys_enc->hw_ctl->ops.update_pending_flush_cdm)
> +                       phys_enc->hw_ctl->ops.update_pending_flush_cdm(phys_enc->hw_ctl);
> +       }
> +
>         if (dpu_enc->dsc) {
>                 dpu_encoder_unprep_dsc(dpu_enc);
>                 dpu_enc->dsc = NULL;
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
> index 24dbc28be4f8..510c1c41ddbc 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h
> @@ -150,6 +150,7 @@ enum dpu_intr_idx {
>   * @hw_pp:             Hardware interface to the ping pong registers
>   * @hw_intf:           Hardware interface to the intf registers
>   * @hw_wb:             Hardware interface to the wb registers
> + * @hw_cdm:            Hardware interface to the CDM registers
>   * @dpu_kms:           Pointer to the dpu_kms top level
>   * @cached_mode:       DRM mode cached at mode_set time, acted on in enable
>   * @enabled:           Whether the encoder has enabled and running a mode
> @@ -178,6 +179,7 @@ struct dpu_encoder_phys {
>         struct dpu_hw_pingpong *hw_pp;
>         struct dpu_hw_intf *hw_intf;
>         struct dpu_hw_wb *hw_wb;
> +       struct dpu_hw_cdm *hw_cdm;
>         struct dpu_kms *dpu_kms;
>         struct drm_display_mode cached_mode;
>         enum dpu_enc_split_role split_role;
> --
> 2.40.1
>


-- 
With best wishes
Dmitry