diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c index 2dd3af3debe9..3168a5577773 100644 --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -4630,12 +4630,56 @@ skl_compute_linetime_wm(struct intel_crtc_state *cstate) } static void skl_compute_transition_wm(struct intel_crtc_state *cstate, + struct skl_wm_params *wp, + struct skl_wm_level *wm_l0, + uint16_t ddb_allocation, struct skl_wm_level *trans_wm /* out */) { - if (!cstate->base.active) - return; + struct drm_device *dev = cstate->base.crtc->dev; + const struct drm_i915_private *dev_priv = to_i915(dev); + uint16_t trans_min, trans_y_tile_min; + const uint16_t trans_amount = 10; /* This is configurable amount */ + uint16_t trans_offset_b, res_blocks; - /* Until we know more, just disable transition WMs */ + if (!cstate->base.active) + goto exit; + + /* Transition WM are not recommended by HW team for GEN9 */ + if (INTEL_GEN(dev_priv) <= 9) + goto exit; + + /* Transition WM don't make any sense if ipc is disabled */ + if (!dev_priv->ipc_enabled) + goto exit; + + if (INTEL_GEN(dev_priv) >= 10) + trans_min = 4; + + trans_offset_b = trans_min + trans_amount; + + if (wp->y_tiled) { + trans_y_tile_min = (uint16_t) mul_round_up_u32_fixed16(2, + wp->y_tile_minimum); + res_blocks = max(wm_l0->plane_res_b, trans_y_tile_min) + + trans_offset_b; + } else { + res_blocks = wm_l0->plane_res_b + trans_offset_b; + + /* WA BUG:1938466 add one block for non y-tile planes */ + if (IS_CNL_REVID(dev_priv, CNL_REVID_A0, CNL_REVID_A0)) + res_blocks += 1; + + } + + res_blocks += 1; + + if (res_blocks < ddb_allocation) { + trans_wm->plane_res_b = res_blocks; + trans_wm->plane_en = true; + return; + } + +exit: trans_wm->plane_en = false; } @@ -4662,8 +4706,11 @@ static int skl_build_pipe_wm(struct intel_crtc_state *cstate, to_intel_plane_state(pstate); enum plane_id plane_id = to_intel_plane(plane)->id; struct skl_wm_params wm_params; + enum pipe pipe = to_intel_crtc(cstate->base.crtc)->pipe; + uint16_t ddb_blocks; wm = &pipe_wm->planes[plane_id]; + ddb_blocks = skl_ddb_entry_size(&ddb->plane[pipe][plane_id]); memset(&wm_params, 0, sizeof(struct skl_wm_params)); ret = skl_compute_plane_wm_params(dev_priv, cstate, @@ -4675,7 +4722,8 @@ static int skl_build_pipe_wm(struct intel_crtc_state *cstate, intel_pstate, &wm_params, wm); if (ret) return ret; - skl_compute_transition_wm(cstate, &wm->trans_wm); + skl_compute_transition_wm(cstate, &wm_params, &wm->wm[0], + ddb_blocks, &wm->trans_wm); } pipe_wm->linetime = skl_compute_linetime_wm(cstate);