drm/msm/disp/dpu1: Add DSC support in RM

This add the bits in RM to enable the DSC blocks

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Patchwork: https://patchwork.freedesktop.org/patch/480928/
Link: https://lore.kernel.org/r/20220406094031.1027376-12-vkoul@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

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

@@ -145,6 +145,7 @@ struct dpu_global_state {
 	uint32_t mixer_to_enc_id[LM_MAX - LM_0];
 	uint32_t ctl_to_enc_id[CTL_MAX - CTL_0];
 	uint32_t dspp_to_enc_id[DSPP_MAX - DSPP_0];
+	uint32_t dsc_to_enc_id[DSC_MAX - DSC_0];
 };
 
 struct dpu_global_state

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

@@ -11,6 +11,7 @@
 #include "dpu_hw_intf.h"
 #include "dpu_hw_dspp.h"
 #include "dpu_hw_merge3d.h"
+#include "dpu_hw_dsc.h"
 #include "dpu_encoder.h"
 #include "dpu_trace.h"
 
@@ -77,6 +78,15 @@ int dpu_rm_destroy(struct dpu_rm *rm)
 	for (i = 0; i < ARRAY_SIZE(rm->hw_intf); i++)
 		dpu_hw_intf_destroy(rm->hw_intf[i]);
 
+	for (i = 0; i < ARRAY_SIZE(rm->dsc_blks); i++) {
+		struct dpu_hw_dsc *hw;
+
+		if (rm->dsc_blks[i]) {
+			hw = to_dpu_hw_dsc(rm->dsc_blks[i]);
+			dpu_hw_dsc_destroy(hw);
+		}
+	}
+
 	return 0;
 }
 
@@ -210,6 +220,19 @@ int dpu_rm_init(struct dpu_rm *rm,
 		rm->dspp_blks[dspp->id - DSPP_0] = &hw->base;
 	}
 
+	for (i = 0; i < cat->dsc_count; i++) {
+		struct dpu_hw_dsc *hw;
+		const struct dpu_dsc_cfg *dsc = &cat->dsc[i];
+
+		hw = dpu_hw_dsc_init(dsc->id, mmio, cat);
+		if (IS_ERR_OR_NULL(hw)) {
+			rc = PTR_ERR(hw);
+			DPU_ERROR("failed dsc object creation: err %d\n", rc);
+			goto fail;
+		}
+		rm->dsc_blks[dsc->id - DSC_0] = &hw->base;
+	}
+
 	return 0;
 
 fail:
@@ -441,6 +464,28 @@ static int _dpu_rm_reserve_ctls(
 	return 0;
 }
 
+static int _dpu_rm_reserve_dsc(struct dpu_rm *rm,
+			       struct dpu_global_state *global_state,
+			       struct drm_encoder *enc,
+			       const struct msm_display_topology *top)
+{
+	int num_dsc = top->num_dsc;
+	int i;
+
+	/* check if DSC required are allocated or not */
+	for (i = 0; i < num_dsc; i++) {
+		if (global_state->dsc_to_enc_id[i]) {
+			DPU_ERROR("DSC %d is already allocated\n", i);
+			return -EIO;
+		}
+	}
+
+	for (i = 0; i < num_dsc; i++)
+		global_state->dsc_to_enc_id[i] = enc->base.id;
+
+	return 0;
+}
+
 static int _dpu_rm_make_reservation(
 		struct dpu_rm *rm,
 		struct dpu_global_state *global_state,
@@ -462,6 +507,10 @@ static int _dpu_rm_make_reservation(
 		return ret;
 	}
 
+	ret  = _dpu_rm_reserve_dsc(rm, global_state, enc, &reqs->topology);
+	if (ret)
+		return ret;
+
 	return ret;
 }
 
@@ -499,6 +548,8 @@ void dpu_rm_release(struct dpu_global_state *global_state,
 		ARRAY_SIZE(global_state->mixer_to_enc_id), enc->base.id);
 	_dpu_rm_clear_mapping(global_state->ctl_to_enc_id,
 		ARRAY_SIZE(global_state->ctl_to_enc_id), enc->base.id);
+	_dpu_rm_clear_mapping(global_state->dsc_to_enc_id,
+		ARRAY_SIZE(global_state->dsc_to_enc_id), enc->base.id);
 }
 
 int dpu_rm_reserve(
@@ -567,6 +618,11 @@ int dpu_rm_get_assigned_resources(struct dpu_rm *rm,
 		hw_to_enc_id = global_state->dspp_to_enc_id;
 		max_blks = ARRAY_SIZE(rm->dspp_blks);
 		break;
+	case DPU_HW_BLK_DSC:
+		hw_blks = rm->dsc_blks;
+		hw_to_enc_id = global_state->dsc_to_enc_id;
+		max_blks = ARRAY_SIZE(rm->dsc_blks);
+		break;
 	default:
 		DPU_ERROR("blk type %d not managed by rm\n", type);
 		return 0;

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

@@ -28,6 +28,7 @@ struct dpu_rm {
 	struct dpu_hw_intf *hw_intf[INTF_MAX - INTF_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];
 };
 
 /**