drm/msm/dpu: get rid of cached flush_mask

Instead of querying the CTL for the flush mask (for SSPP, LM or DSPP),
storing the mask in the mixer configuration and then pushing the mask to
the CTL, tell CTL to cache the flush in place.

Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Abhinav Kumar <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/473159/
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Baryshkov <[e-mail]>
Signed-off-by: Rob Clark <[e-mail]>

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.c

···
 			_dpu_crtc_setup_blend_cfg(mixer + lm_idx,
 						pstate, format);
 
-			mixer[lm_idx].flush_mask |= ctl->ops.get_bitmask_sspp(ctl, sspp_idx);
+			mixer[lm_idx].lm_ctl->ops.update_pending_flush_sspp(mixer[lm_idx].lm_ctl,
+									    sspp_idx);
 
 			if (bg_alpha_enable && !format->alpha_enable)
 				mixer[lm_idx].mixer_op_mode = 0;
···
 
 	for (i = 0; i < cstate->num_mixers; i++) {
 		mixer[i].mixer_op_mode = 0;
-		mixer[i].flush_mask = 0;
 		if (mixer[i].lm_ctl->ops.clear_all_blendstages)
 			mixer[i].lm_ctl->ops.clear_all_blendstages(
 					mixer[i].lm_ctl);
···
 
 		lm->ops.setup_alpha_out(lm, mixer[i].mixer_op_mode);
 
-		mixer[i].flush_mask |= ctl->ops.get_bitmask_mixer(ctl,
+		/* stage config flush mask */
+		ctl->ops.update_pending_flush_mixer(ctl,
 			mixer[i].hw_lm->idx);
 
-		/* stage config flush mask */
-		ctl->ops.update_pending_flush(ctl, mixer[i].flush_mask);
-
-		DRM_DEBUG_ATOMIC("lm %d, op_mode 0x%X, ctl %d, flush mask 0x%x\n",
+		DRM_DEBUG_ATOMIC("lm %d, op_mode 0x%X, ctl %d\n",
 			mixer[i].hw_lm->idx - LM_0,
 			mixer[i].mixer_op_mode,
-			ctl->idx - CTL_0,
-			mixer[i].flush_mask);
+			ctl->idx - CTL_0);
 
 		ctl->ops.setup_blendstage(ctl, mixer[i].hw_lm->idx,
 			&stage_cfg);
···
 			dspp->ops.setup_pcc(dspp, &cfg);
 		}
 
-		mixer[i].flush_mask |= ctl->ops.get_bitmask_dspp(ctl,
-			mixer[i].hw_dspp->idx);
-
 		/* stage config flush mask */
-		ctl->ops.update_pending_flush(ctl, mixer[i].flush_mask);
-
-		DRM_DEBUG_ATOMIC("lm %d, ctl %d, flush mask 0x%x\n",
-			mixer[i].hw_lm->idx - DSPP_0,
-			ctl->idx - CTL_0,
-			mixer[i].flush_mask);
+		ctl->ops.update_pending_flush_dspp(ctl,
+			mixer[i].hw_dspp->idx);
 	}
 }
 

drivers/gpu/drm/msm/disp/dpu1/dpu_crtc.h

···
 	struct dpu_hw_ctl *lm_ctl;
 	struct dpu_hw_dspp *hw_dspp;
 	u32 mixer_op_mode;
-	u32 flush_mask;
 };
 
 /**

drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c

···
 {
 	struct dpu_hw_mixer_cfg mixer;
 	int i, num_lm;
-	u32 flush_mask = 0;
 	struct dpu_global_state *global_state;
 	struct dpu_hw_blk *hw_lm[2];
 	struct dpu_hw_mixer *hw_mixer[2];
···
 
 	for (i = 0; i < num_lm; i++) {
 		hw_mixer[i] = to_dpu_hw_mixer(hw_lm[i]);
-		flush_mask = phys_enc->hw_ctl->ops.get_bitmask_mixer(ctl, hw_mixer[i]->idx);
-		if (phys_enc->hw_ctl->ops.update_pending_flush)
-			phys_enc->hw_ctl->ops.update_pending_flush(ctl, flush_mask);
+		if (phys_enc->hw_ctl->ops.update_pending_flush_mixer)
+			phys_enc->hw_ctl->ops.update_pending_flush_mixer(ctl, hw_mixer[i]->idx);
 
 		/* clear all blendstages */
 		if (phys_enc->hw_ctl->ops.setup_blendstage)

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.c

···
 	DPU_REG_WRITE(&ctx->hw, CTL_FLUSH, ctx->pending_flush_mask);
 }
 
-static uint32_t dpu_hw_ctl_get_bitmask_sspp(struct dpu_hw_ctl *ctx,
+static void dpu_hw_ctl_update_pending_flush_sspp(struct dpu_hw_ctl *ctx,
 	enum dpu_sspp sspp)
 {
-	uint32_t flushbits = 0;
-
 	switch (sspp) {
 	case SSPP_VIG0:
-		flushbits =  BIT(0);
+		ctx->pending_flush_mask |=  BIT(0);
 		break;
 	case SSPP_VIG1:
-		flushbits = BIT(1);
+		ctx->pending_flush_mask |= BIT(1);
 		break;
 	case SSPP_VIG2:
-		flushbits = BIT(2);
+		ctx->pending_flush_mask |= BIT(2);
 		break;
 	case SSPP_VIG3:
-		flushbits = BIT(18);
+		ctx->pending_flush_mask |= BIT(18);
 		break;
 	case SSPP_RGB0:
-		flushbits = BIT(3);
+		ctx->pending_flush_mask |= BIT(3);
 		break;
 	case SSPP_RGB1:
-		flushbits = BIT(4);
+		ctx->pending_flush_mask |= BIT(4);
 		break;
 	case SSPP_RGB2:
-		flushbits = BIT(5);
+		ctx->pending_flush_mask |= BIT(5);
 		break;
 	case SSPP_RGB3:
-		flushbits = BIT(19);
+		ctx->pending_flush_mask |= BIT(19);
 		break;
 	case SSPP_DMA0:
-		flushbits = BIT(11);
+		ctx->pending_flush_mask |= BIT(11);
 		break;
 	case SSPP_DMA1:
-		flushbits = BIT(12);
+		ctx->pending_flush_mask |= BIT(12);
 		break;
 	case SSPP_DMA2:
-		flushbits = BIT(24);
+		ctx->pending_flush_mask |= BIT(24);
 		break;
 	case SSPP_DMA3:
-		flushbits = BIT(25);
+		ctx->pending_flush_mask |= BIT(25);
 		break;
 	case SSPP_CURSOR0:
-		flushbits = BIT(22);
+		ctx->pending_flush_mask |= BIT(22);
 		break;
 	case SSPP_CURSOR1:
-		flushbits = BIT(23);
+		ctx->pending_flush_mask |= BIT(23);
 		break;
 	default:
 		break;
 	}
-
-	return flushbits;
 }
 
-static uint32_t dpu_hw_ctl_get_bitmask_mixer(struct dpu_hw_ctl *ctx,
+static void dpu_hw_ctl_update_pending_flush_mixer(struct dpu_hw_ctl *ctx,
 	enum dpu_lm lm)
 {
-	uint32_t flushbits = 0;
-
 	switch (lm) {
 	case LM_0:
-		flushbits = BIT(6);
+		ctx->pending_flush_mask |= BIT(6);
 		break;
 	case LM_1:
-		flushbits = BIT(7);
+		ctx->pending_flush_mask |= BIT(7);
 		break;
 	case LM_2:
-		flushbits = BIT(8);
+		ctx->pending_flush_mask |= BIT(8);
 		break;
 	case LM_3:
-		flushbits = BIT(9);
+		ctx->pending_flush_mask |= BIT(9);
 		break;
 	case LM_4:
-		flushbits = BIT(10);
+		ctx->pending_flush_mask |= BIT(10);
 		break;
 	case LM_5:
-		flushbits = BIT(20);
+		ctx->pending_flush_mask |= BIT(20);
 		break;
 	default:
-		return -EINVAL;
+		break;
 	}
 
-	flushbits |= CTL_FLUSH_MASK_CTL;
-
-	return flushbits;
+	ctx->pending_flush_mask |= CTL_FLUSH_MASK_CTL;
 }
 
 static void dpu_hw_ctl_update_pending_flush_intf(struct dpu_hw_ctl *ctx,
···
 	ctx->pending_flush_mask |= BIT(MERGE_3D_IDX);
 }
 
-static uint32_t dpu_hw_ctl_get_bitmask_dspp(struct dpu_hw_ctl *ctx,
+static void dpu_hw_ctl_update_pending_flush_dspp(struct dpu_hw_ctl *ctx,
 	enum dpu_dspp dspp)
 {
-	uint32_t flushbits = 0;
-
 	switch (dspp) {
 	case DSPP_0:
-		flushbits = BIT(13);
+		ctx->pending_flush_mask |= BIT(13);
 		break;
 	case DSPP_1:
-		flushbits = BIT(14);
+		ctx->pending_flush_mask |= BIT(14);
 		break;
 	case DSPP_2:
-		flushbits = BIT(15);
+		ctx->pending_flush_mask |= BIT(15);
 		break;
 	case DSPP_3:
-		flushbits = BIT(21);
+		ctx->pending_flush_mask |= BIT(21);
 		break;
 	default:
-		return 0;
+		break;
 	}
-
-	return flushbits;
 }
 
 static u32 dpu_hw_ctl_poll_reset_status(struct dpu_hw_ctl *ctx, u32 timeout_us)
···
 	ops->wait_reset_status = dpu_hw_ctl_wait_reset_status;
 	ops->clear_all_blendstages = dpu_hw_ctl_clear_all_blendstages;
 	ops->setup_blendstage = dpu_hw_ctl_setup_blendstage;
-	ops->get_bitmask_sspp = dpu_hw_ctl_get_bitmask_sspp;
-	ops->get_bitmask_mixer = dpu_hw_ctl_get_bitmask_mixer;
-	ops->get_bitmask_dspp = dpu_hw_ctl_get_bitmask_dspp;
+	ops->update_pending_flush_sspp = dpu_hw_ctl_update_pending_flush_sspp;
+	ops->update_pending_flush_mixer = dpu_hw_ctl_update_pending_flush_mixer;
+	ops->update_pending_flush_dspp = dpu_hw_ctl_update_pending_flush_dspp;
 	if (cap & BIT(DPU_CTL_FETCH_ACTIVE))
 		ops->set_active_pipes = dpu_hw_ctl_set_fetch_pipe_active;
 };

drivers/gpu/drm/msm/disp/dpu1/dpu_hw_ctl.h

···
 		enum dpu_merge_3d blk);
 
 	/**
+	 * OR in the given flushbits to the cached pending_flush_mask
+	 * No effect on hardware
+	 * @ctx       : ctl path ctx pointer
+	 * @blk       : SSPP block index
+	 */
+	void (*update_pending_flush_sspp)(struct dpu_hw_ctl *ctx,
+		enum dpu_sspp blk);
+
+	/**
+	 * OR in the given flushbits to the cached pending_flush_mask
+	 * No effect on hardware
+	 * @ctx       : ctl path ctx pointer
+	 * @blk       : LM block index
+	 */
+	void (*update_pending_flush_mixer)(struct dpu_hw_ctl *ctx,
+		enum dpu_lm blk);
+
+	/**
+	 * OR in the given flushbits to the cached pending_flush_mask
+	 * No effect on hardware
+	 * @ctx       : ctl path ctx pointer
+	 * @blk       : DSPP block index
+	 */
+	void (*update_pending_flush_dspp)(struct dpu_hw_ctl *ctx,
+		enum dpu_dspp blk);
+	/**
 	 * Write the value of the pending_flush_mask to hardware
 	 * @ctx       : ctl path ctx pointer
 	 */
···
 	 * Returns: 0 on success or -error if reset incomplete within interval
 	 */
 	int (*wait_reset_status)(struct dpu_hw_ctl *ctx);
-
-	uint32_t (*get_bitmask_sspp)(struct dpu_hw_ctl *ctx,
-		enum dpu_sspp blk);
-
-	uint32_t (*get_bitmask_mixer)(struct dpu_hw_ctl *ctx,
-		enum dpu_lm blk);
-
-	uint32_t (*get_bitmask_dspp)(struct dpu_hw_ctl *ctx,
-		enum dpu_dspp blk);
 
 	/**
 	 * Set all blend stages to disabled