diff options
Diffstat (limited to 'drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c')
| -rw-r--r-- | drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c | 154 |
1 files changed, 139 insertions, 15 deletions
diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c index 724537ab776d..cb5ce3c62a22 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_rm.c @@ -409,29 +409,153 @@ 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) +static int _dpu_rm_pingpong_next_index(struct dpu_global_state *global_state, + int start, + uint32_t enc_id) { - int num_dsc = top->num_dsc; int i; - /* check if DSC required are allocated or not */ - for (i = 0; i < num_dsc; i++) { - if (!rm->dsc_blks[i]) { - DPU_ERROR("DSC %d does not exist\n", i); - return -EIO; + for (i = start; i < (PINGPONG_MAX - PINGPONG_0); i++) { + if (global_state->pingpong_to_enc_id[i] == enc_id) + return i; + } + + return -ENAVAIL; +} + +static int _dpu_rm_pingpong_dsc_check(int dsc_idx, int pp_idx) +{ + /* + * DSC with even index must be used with the PINGPONG with even index + * DSC with odd index must be used with the PINGPONG with odd index + */ + if ((dsc_idx & 0x01) != (pp_idx & 0x01)) + return -ENAVAIL; + + return 0; +} + +static int _dpu_rm_dsc_alloc(struct dpu_rm *rm, + struct dpu_global_state *global_state, + uint32_t enc_id, + const struct msm_display_topology *top) +{ + int num_dsc = 0; + int pp_idx = 0; + int dsc_idx; + int ret; + + for (dsc_idx = 0; dsc_idx < ARRAY_SIZE(rm->dsc_blks) && + num_dsc < top->num_dsc; dsc_idx++) { + if (!rm->dsc_blks[dsc_idx]) + continue; + + if (reserved_by_other(global_state->dsc_to_enc_id, dsc_idx, enc_id)) + continue; + + pp_idx = _dpu_rm_pingpong_next_index(global_state, pp_idx, enc_id); + if (pp_idx < 0) + return -ENAVAIL; + + ret = _dpu_rm_pingpong_dsc_check(dsc_idx, pp_idx); + if (ret) + return -ENAVAIL; + + global_state->dsc_to_enc_id[dsc_idx] = enc_id; + num_dsc++; + pp_idx++; + } + + if (num_dsc < top->num_dsc) { + DPU_ERROR("DSC allocation failed num_dsc=%d required=%d\n", + num_dsc, top->num_dsc); + return -ENAVAIL; + } + + return 0; +} + +static int _dpu_rm_dsc_alloc_pair(struct dpu_rm *rm, + struct dpu_global_state *global_state, + uint32_t enc_id, + const struct msm_display_topology *top) +{ + int num_dsc = 0; + int dsc_idx, pp_idx = 0; + int ret; + + /* only start from even dsc index */ + for (dsc_idx = 0; dsc_idx < ARRAY_SIZE(rm->dsc_blks) && + num_dsc < top->num_dsc; dsc_idx += 2) { + if (!rm->dsc_blks[dsc_idx] || + !rm->dsc_blks[dsc_idx + 1]) + continue; + + /* consective dsc index to be paired */ + if (reserved_by_other(global_state->dsc_to_enc_id, dsc_idx, enc_id) || + reserved_by_other(global_state->dsc_to_enc_id, dsc_idx + 1, enc_id)) + continue; + + pp_idx = _dpu_rm_pingpong_next_index(global_state, pp_idx, enc_id); + if (pp_idx < 0) + return -ENAVAIL; + + ret = _dpu_rm_pingpong_dsc_check(dsc_idx, pp_idx); + if (ret) { + pp_idx = 0; + continue; } - if (global_state->dsc_to_enc_id[i]) { - DPU_ERROR("DSC %d is already allocated\n", i); - return -EIO; + pp_idx = _dpu_rm_pingpong_next_index(global_state, pp_idx + 1, enc_id); + if (pp_idx < 0) + return -ENAVAIL; + + ret = _dpu_rm_pingpong_dsc_check(dsc_idx + 1, pp_idx); + if (ret) { + pp_idx = 0; + continue; } + + global_state->dsc_to_enc_id[dsc_idx] = enc_id; + global_state->dsc_to_enc_id[dsc_idx + 1] = enc_id; + num_dsc += 2; + pp_idx++; /* start for next pair */ } - for (i = 0; i < num_dsc; i++) - global_state->dsc_to_enc_id[i] = enc->base.id; + if (num_dsc < top->num_dsc) { + DPU_ERROR("DSC allocation failed num_dsc=%d required=%d\n", + num_dsc, top->num_dsc); + return -ENAVAIL; + } + + 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) +{ + uint32_t enc_id = enc->base.id; + + if (!top->num_dsc || !top->num_intf) + return 0; + + /* + * Facts: + * 1) no pingpong split (two layer mixers shared one pingpong) + * 2) DSC pair starts from even index, such as index(0,1), (2,3), etc + * 3) even PINGPONG connects to even DSC + * 4) odd PINGPONG connects to odd DSC + * 5) pair: encoder +--> pp_idx_0 --> dsc_idx_0 + * +--> pp_idx_1 --> dsc_idx_1 + */ + + /* num_dsc should be either 1, 2 or 4 */ + if (top->num_dsc > top->num_intf) /* merge mode */ + return _dpu_rm_dsc_alloc_pair(rm, global_state, enc_id, top); + else + return _dpu_rm_dsc_alloc(rm, global_state, enc_id, top); return 0; } |