[PATCH v3 08/18] drm/msm/dpu: add writeback blocks to DPU RM

[Dmitry Baryshkov]

On Thu, 21 Apr 2022 at 02:50, Abhinav Kumar <quic_abhinavk at quicinc.com> wrote:
>
> Add writeback blocks to DPU resource manager so that
> the encoders can directly request them through RM.
>
> changes in v3:
>         - use IS_ERR() instead of IS_ERR_OR_NULL()
>
> Signed-off-by: Abhinav Kumar <quic_abhinavk at quicinc.com>

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>

> ---
>  drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 22 ++++++++++++++++++++++
>  drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h | 12 ++++++++++++
>  2 files changed, 34 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> index 0e6634b..06f03e7 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
> @@ -9,6 +9,7 @@
>  #include "dpu_hw_ctl.h"
>  #include "dpu_hw_pingpong.h"
>  #include "dpu_hw_intf.h"
> +#include "dpu_hw_wb.h"
>  #include "dpu_hw_dspp.h"
>  #include "dpu_hw_merge3d.h"
>  #include "dpu_hw_dsc.h"
> @@ -87,6 +88,9 @@ int dpu_rm_destroy(struct dpu_rm *rm)
>                 }
>         }
>
> +       for (i = 0; i < ARRAY_SIZE(rm->hw_wb); i++)
> +               dpu_hw_wb_destroy(rm->hw_wb[i]);
> +
>         return 0;
>  }
>
> @@ -186,6 +190,24 @@ int dpu_rm_init(struct dpu_rm *rm,
>                 rm->hw_intf[intf->id - INTF_0] = hw;
>         }
>
> +       for (i = 0; i < cat->wb_count; i++) {
> +               struct dpu_hw_wb *hw;
> +               const struct dpu_wb_cfg *wb = &cat->wb[i];
> +
> +               if (wb->id < WB_0 || wb->id >= WB_MAX) {
> +                       DPU_ERROR("skip intf %d with invalid id\n", wb->id);
> +                       continue;
> +               }
> +
> +               hw = dpu_hw_wb_init(wb->id, mmio, cat);
> +               if (IS_ERR(hw)) {
> +                       rc = PTR_ERR(hw);
> +                       DPU_ERROR("failed wb object creation: err %d\n", rc);
> +                       goto fail;
> +               }
> +               rm->hw_wb[wb->id - WB_0] = hw;
> +       }
> +
>         for (i = 0; i < cat->ctl_count; i++) {
>                 struct dpu_hw_ctl *hw;
>                 const struct dpu_ctl_cfg *ctl = &cat->ctl[i];
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h
> index 32e0d8a..ba82e54 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.h
> @@ -19,6 +19,7 @@ struct dpu_global_state;
>   * @mixer_blks: array of layer mixer hardware resources
>   * @ctl_blks: array of ctl hardware resources
>   * @hw_intf: array of intf hardware resources
> + * @hw_wb: array of wb hardware resources
>   * @dspp_blks: array of dspp hardware resources
>   */
>  struct dpu_rm {
> @@ -26,6 +27,7 @@ struct dpu_rm {
>         struct dpu_hw_blk *mixer_blks[LM_MAX - LM_0];
>         struct dpu_hw_blk *ctl_blks[CTL_MAX - CTL_0];
>         struct dpu_hw_intf *hw_intf[INTF_MAX - INTF_0];
> +       struct dpu_hw_wb *hw_wb[WB_MAX - WB_0];
>         struct dpu_hw_blk *dspp_blks[DSPP_MAX - DSPP_0];
>         struct dpu_hw_blk *merge_3d_blks[MERGE_3D_MAX - MERGE_3D_0];
>         struct dpu_hw_blk *dsc_blks[DSC_MAX - DSC_0];
> @@ -96,5 +98,15 @@ static inline struct dpu_hw_intf *dpu_rm_get_intf(struct dpu_rm *rm, enum dpu_in
>         return rm->hw_intf[intf_idx - INTF_0];
>  }
>
> +/**
> + * dpu_rm_get_wb - Return a struct dpu_hw_wb instance given it's index.
> + * @rm: DPU Resource Manager handle
> + * @wb_idx: WB index
> + */
> +static inline struct dpu_hw_wb *dpu_rm_get_wb(struct dpu_rm *rm, enum dpu_intf wb_idx)
> +{
> +       return rm->hw_wb[wb_idx - WB_0];
> +}
> +
>  #endif /* __DPU_RM_H__ */
>
> --
> 2.7.4
>


-- 
With best wishes
Dmitry