drm/msm/dpu: add support to allocate CDM from RM

[linux-2.6-microblaze.git] / drivers / gpu / drm / msm / disp / dpu1 / dpu_rm.c

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
index 7ed476b..b58a9c2 100644 (file)
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c
@@ -435,6 +435,26 @@ static int _dpu_rm_reserve_dsc(struct dpu_rm *rm,
        return 0;
 }
 
+static int _dpu_rm_reserve_cdm(struct dpu_rm *rm,
+                              struct dpu_global_state *global_state,
+                              struct drm_encoder *enc)
+{
+       /* try allocating only one CDM block */
+       if (!rm->cdm_blk) {
+               DPU_ERROR("CDM block does not exist\n");
+               return -EIO;
+       }
+
+       if (global_state->cdm_to_enc_id) {
+               DPU_ERROR("CDM_0 is already allocated\n");
+               return -EIO;
+       }
+
+       global_state->cdm_to_enc_id = enc->base.id;
+
+       return 0;
+}
+
 static int _dpu_rm_make_reservation(
                struct dpu_rm *rm,
                struct dpu_global_state *global_state,
@@ -460,6 +480,14 @@ static int _dpu_rm_make_reservation(
        if (ret)
                return ret;
 
+       if (reqs->topology.needs_cdm) {
+               ret = _dpu_rm_reserve_cdm(rm, global_state, enc);
+               if (ret) {
+                       DPU_ERROR("unable to find CDM blk\n");
+                       return ret;
+               }
+       }
+
        return ret;
 }
 
@@ -470,9 +498,9 @@ static int _dpu_rm_populate_requirements(
 {
        reqs->topology = req_topology;
 
-       DRM_DEBUG_KMS("num_lm: %d num_dsc: %d num_intf: %d\n",
+       DRM_DEBUG_KMS("num_lm: %d num_dsc: %d num_intf: %d cdm: %d\n",
                      reqs->topology.num_lm, reqs->topology.num_dsc,
-                     reqs->topology.num_intf);
+                     reqs->topology.num_intf, reqs->topology.needs_cdm);
 
        return 0;
 }
@@ -501,6 +529,7 @@ void dpu_rm_release(struct dpu_global_state *global_state,
                ARRAY_SIZE(global_state->dsc_to_enc_id), enc->base.id);
        _dpu_rm_clear_mapping(global_state->dspp_to_enc_id,
                ARRAY_SIZE(global_state->dspp_to_enc_id), enc->base.id);
+       _dpu_rm_clear_mapping(&global_state->cdm_to_enc_id, 1, enc->base.id);
 }
 
 int dpu_rm_reserve(
@@ -574,6 +603,11 @@ int dpu_rm_get_assigned_resources(struct dpu_rm *rm,
                hw_to_enc_id = global_state->dsc_to_enc_id;
                max_blks = ARRAY_SIZE(rm->dsc_blks);
                break;
+       case DPU_HW_BLK_CDM:
+               hw_blks = &rm->cdm_blk;
+               hw_to_enc_id = &global_state->cdm_to_enc_id;
+               max_blks = 1;
+               break;
        default:
                DPU_ERROR("blk type %d not managed by rm\n", type);
                return 0;