Re: [PATCH 09/16] drm/msm/dpu: add CDM related logic to dpu_hw_ctl layer

From: Dmitry Baryshkov
Date: Wed Aug 30 2023 - 20:13:02 EST

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In reply to: Abhinav Kumar: "[PATCH 09/16] drm/msm/dpu: add CDM related logic to dpu_hw_ctl layer"
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On Thu, 31 Aug 2023 at 01:50, Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx> wrote:
>
> CDM block will need its own logic to program the flush and active
> bits in the dpu_hw_ctl layer.
>
> Make necessary changes in dpu_hw_ctl to support CDM programming.
>
> Signed-off-by: Abhinav Kumar <quic_abhinavk@xxxxxxxxxxx>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c | 34 ++++++++++++++++++++++
> drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h | 11 +++++++
> 2 files changed, 45 insertions(+)
>
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> index c278fb9d2b5b..beced9f19740 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c
> @@ -29,11 +29,13 @@
> #define CTL_DSC_ACTIVE 0x0E8
> #define CTL_WB_ACTIVE 0x0EC
> #define CTL_INTF_ACTIVE 0x0F4
> +#define CTL_CDM_ACTIVE 0x0F8
> #define CTL_FETCH_PIPE_ACTIVE 0x0FC
> #define CTL_MERGE_3D_FLUSH 0x100
> #define CTL_DSC_FLUSH 0x104
> #define CTL_WB_FLUSH 0x108
> #define CTL_INTF_FLUSH 0x110
> +#define CTL_CDM_FLUSH 0x114
> #define CTL_INTF_MASTER 0x134
> #define CTL_DSPP_n_FLUSH(n) ((0x13C) + ((n) * 4))
>
> @@ -43,6 +45,7 @@
> #define DPU_REG_RESET_TIMEOUT_US 2000
> #define MERGE_3D_IDX 23
> #define DSC_IDX 22
> +#define CDM_IDX 26
> #define INTF_IDX 31
> #define WB_IDX 16
> #define DSPP_IDX 29 /* From DPU hw rev 7.x.x */
> @@ -104,6 +107,7 @@ static inline void dpu_hw_ctl_clear_pending_flush(struct dpu_hw_ctl *ctx)
> ctx->pending_wb_flush_mask = 0;
> ctx->pending_merge_3d_flush_mask = 0;
> ctx->pending_dsc_flush_mask = 0;
> + ctx->pending_cdm_flush_mask = 0;
>
> memset(ctx->pending_dspp_flush_mask, 0,
> sizeof(ctx->pending_dspp_flush_mask));
> @@ -148,6 +152,10 @@ static inline void dpu_hw_ctl_trigger_flush_v1(struct dpu_hw_ctl *ctx)
> DPU_REG_WRITE(&ctx->hw, CTL_DSC_FLUSH,
> ctx->pending_dsc_flush_mask);
>
> + if (ctx->pending_flush_mask & BIT(CDM_IDX))
> + DPU_REG_WRITE(&ctx->hw, CTL_CDM_FLUSH,
> + ctx->pending_cdm_flush_mask);
> +
> DPU_REG_WRITE(&ctx->hw, CTL_FLUSH, ctx->pending_flush_mask);
> }
>
> @@ -273,6 +281,12 @@ static void dpu_hw_ctl_update_pending_flush_wb(struct dpu_hw_ctl *ctx,
> }
> }
>
> +static void dpu_hw_ctl_update_pending_flush_cdm(struct dpu_hw_ctl *ctx)
> +{
> + ctx->pending_flush_mask |= BIT(CDM_IDX);
> +

unused empty line.

> +}
> +
> static void dpu_hw_ctl_update_pending_flush_wb_v1(struct dpu_hw_ctl *ctx,
> enum dpu_wb wb)
> {
> @@ -301,6 +315,12 @@ static void dpu_hw_ctl_update_pending_flush_dsc_v1(struct dpu_hw_ctl *ctx,
> ctx->pending_flush_mask |= BIT(DSC_IDX);
> }
>
> +static void dpu_hw_ctl_update_pending_flush_cdm_v1(struct dpu_hw_ctl *ctx)
> +{
> + ctx->pending_cdm_flush_mask |= BIT(0);

I'd assume this is because there is just CDM_0? Then it still might be
better to write BIT(cdm->idx - CDM_0).

> + ctx->pending_flush_mask |= BIT(CDM_IDX);
> +}
> +
> static void dpu_hw_ctl_update_pending_flush_dspp(struct dpu_hw_ctl *ctx,
> enum dpu_dspp dspp, u32 dspp_sub_blk)
> {
> @@ -504,6 +524,7 @@ static void dpu_hw_ctl_intf_cfg_v1(struct dpu_hw_ctl *ctx,
> u32 intf_active = 0;
> u32 wb_active = 0;
> u32 mode_sel = 0;
> + u32 cdm_active = 0;
>
> /* CTL_TOP[31:28] carries group_id to collate CTL paths
> * per VM. Explicitly disable it until VM support is
> @@ -517,6 +538,7 @@ static void dpu_hw_ctl_intf_cfg_v1(struct dpu_hw_ctl *ctx,
>
> intf_active = DPU_REG_READ(c, CTL_INTF_ACTIVE);
> wb_active = DPU_REG_READ(c, CTL_WB_ACTIVE);
> + cdm_active = DPU_REG_READ(c, CTL_CDM_ACTIVE);
>
> if (cfg->intf)
> intf_active |= BIT(cfg->intf - INTF_0);
> @@ -534,6 +556,9 @@ static void dpu_hw_ctl_intf_cfg_v1(struct dpu_hw_ctl *ctx,
>
> if (cfg->dsc)
> DPU_REG_WRITE(c, CTL_DSC_ACTIVE, cfg->dsc);
> +
> + if (cfg->cdm)
> + DPU_REG_WRITE(c, CTL_CDM_ACTIVE, cfg->cdm);
> }
>
> static void dpu_hw_ctl_intf_cfg(struct dpu_hw_ctl *ctx,
> @@ -577,6 +602,7 @@ static void dpu_hw_ctl_reset_intf_cfg_v1(struct dpu_hw_ctl *ctx,
> u32 wb_active = 0;
> u32 merge3d_active = 0;
> u32 dsc_active;
> + u32 cdm_active;
>
> /*
> * This API resets each portion of the CTL path namely,
> @@ -612,6 +638,12 @@ static void dpu_hw_ctl_reset_intf_cfg_v1(struct dpu_hw_ctl *ctx,
> dsc_active &= ~cfg->dsc;
> DPU_REG_WRITE(c, CTL_DSC_ACTIVE, dsc_active);
> }
> +
> + if (cfg->cdm) {
> + cdm_active = DPU_REG_READ(c, CTL_CDM_ACTIVE);
> + cdm_active &= ~cfg->cdm;
> + DPU_REG_WRITE(c, CTL_CDM_ACTIVE, cdm_active);
> + }
> }
>
> static void dpu_hw_ctl_set_fetch_pipe_active(struct dpu_hw_ctl *ctx,
> @@ -645,12 +677,14 @@ static void _setup_ctl_ops(struct dpu_hw_ctl_ops *ops,
> ops->update_pending_flush_wb = dpu_hw_ctl_update_pending_flush_wb_v1;
> ops->update_pending_flush_dsc =
> dpu_hw_ctl_update_pending_flush_dsc_v1;
> + ops->update_pending_flush_cdm = dpu_hw_ctl_update_pending_flush_cdm_v1;
> } else {
> ops->trigger_flush = dpu_hw_ctl_trigger_flush;
> ops->setup_intf_cfg = dpu_hw_ctl_intf_cfg;
> ops->update_pending_flush_intf =
> dpu_hw_ctl_update_pending_flush_intf;
> ops->update_pending_flush_wb = dpu_hw_ctl_update_pending_flush_wb;
> + ops->update_pending_flush_cdm = dpu_hw_ctl_update_pending_flush_cdm;
> }
> ops->clear_pending_flush = dpu_hw_ctl_clear_pending_flush;
> ops->update_pending_flush = dpu_hw_ctl_update_pending_flush;
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
> index 1c242298ff2e..6dd44dfdfb61 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h
> @@ -39,6 +39,7 @@ struct dpu_hw_stage_cfg {
> * @mode_3d: 3d mux configuration
> * @merge_3d: 3d merge block used
> * @intf_mode_sel: Interface mode, cmd / vid
> + * @cdm: CDM block used
> * @stream_sel: Stream selection for multi-stream interfaces
> * @dsc: DSC BIT masks used
> */
> @@ -48,6 +49,7 @@ struct dpu_hw_intf_cfg {
> enum dpu_3d_blend_mode mode_3d;
> enum dpu_merge_3d merge_3d;
> enum dpu_ctl_mode_sel intf_mode_sel;
> + enum dpu_cdm cdm;
> int stream_sel;
> unsigned int dsc;
> };
> @@ -166,6 +168,13 @@ struct dpu_hw_ctl_ops {
> void (*update_pending_flush_dsc)(struct dpu_hw_ctl *ctx,
> enum dpu_dsc blk);
>
> + /**
> + * OR in the given flushbits to the cached pending_(cdm_)flush_mask
> + * No effect on hardware
> + * @ctx: ctl path ctx pointer
> + */
> + void (*update_pending_flush_cdm)(struct dpu_hw_ctl *ctx);
> +
> /**
> * Write the value of the pending_flush_mask to hardware
> * @ctx : ctl path ctx pointer
> @@ -239,6 +248,7 @@ struct dpu_hw_ctl_ops {
> * @pending_intf_flush_mask: pending INTF flush
> * @pending_wb_flush_mask: pending WB flush
> * @pending_dsc_flush_mask: pending DSC flush
> + * @pending_cdm_flush_mask: pending CDM flush
> * @ops: operation list
> */
> struct dpu_hw_ctl {
> @@ -256,6 +266,7 @@ struct dpu_hw_ctl {
> u32 pending_merge_3d_flush_mask;
> u32 pending_dspp_flush_mask[DSPP_MAX - DSPP_0];
> u32 pending_dsc_flush_mask;
> + u32 pending_cdm_flush_mask;
>
> /* ops */
> struct dpu_hw_ctl_ops ops;
> --
> 2.40.1
>

--
With best wishes
Dmitry

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In reply to: Abhinav Kumar: "[PATCH 09/16] drm/msm/dpu: add CDM related logic to dpu_hw_ctl layer"
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