Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S942575AbcJ2NwB (ORCPT ); Sat, 29 Oct 2016 09:52:01 -0400 Received: from mail.linuxfoundation.org ([140.211.169.12]:49472 "EHLO mail.linuxfoundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932615AbcJ2Nvx (ORCPT ); Sat, 29 Oct 2016 09:51:53 -0400 From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mike Lothian , Paulo Zanoni , Lyude , Jani Nikula Subject: [PATCH 4.8 023/125] drm/i915/gen9: only add the planes actually affected by ddb changes Date: Sat, 29 Oct 2016 09:49:01 -0400 Message-Id: <20161029134948.187535339@linuxfoundation.org> X-Mailer: git-send-email 2.10.1 In-Reply-To: <20161029134947.232372651@linuxfoundation.org> References: <20161029134947.232372651@linuxfoundation.org> User-Agent: quilt/0.64 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3298 Lines: 92 4.8-stable review patch. If anyone has any objections, please let me know. ------------------ From: Paulo Zanoni commit be5c571b2ff3a164d2e14ccc100cb5b2b3d3fb7c upstream. We were previously adding all the planes owned by the CRTC even when the ddb partitioning didn't change for them. As a consequence, a lot of functions were being called when we were just moving the cursor around the screen, such as skylake_update_primary_plane(). This was causing flickering on the primary plane when moving the cursor. I'm not 100% sure which operation caused the flickering, but we were writing to a lot of registers, so it could be any of these writes. With this patch, just moving the mouse won't add the primary plane to the commit since it won't trigger a change in DDB partitioning. v2: Use skl_ddb_entry_equal() (Lyude). v3: Change Reported-and-bisected-by: to Reported-by: for checkpatch Fixes: 05a76d3d6ad1 ("drm/i915/skl: Ensure pipes with changed wms get added to the state") Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=97888 Cc: Mike Lothian Reported-by: Mike Lothian Signed-off-by: Paulo Zanoni Signed-off-by: Lyude Link: http://patchwork.freedesktop.org/patch/msgid/1475177808-29955-1-git-send-email-paulo.r.zanoni@intel.com (cherry picked from commit 7f60e200e254cd53ad1bd74a56bdd23e813ac4b7) Signed-off-by: Jani Nikula Signed-off-by: Greg Kroah-Hartman --- drivers/gpu/drm/i915/intel_pm.c | 37 ++++++++++++++++++++++++++++++++++++- 1 file changed, 36 insertions(+), 1 deletion(-) --- a/drivers/gpu/drm/i915/intel_pm.c +++ b/drivers/gpu/drm/i915/intel_pm.c @@ -3940,6 +3940,41 @@ pipes_modified(struct drm_atomic_state * return ret; } +int +skl_ddb_add_affected_planes(struct intel_crtc_state *cstate) +{ + struct drm_atomic_state *state = cstate->base.state; + struct drm_device *dev = state->dev; + struct drm_crtc *crtc = cstate->base.crtc; + struct intel_crtc *intel_crtc = to_intel_crtc(crtc); + struct drm_i915_private *dev_priv = to_i915(dev); + struct intel_atomic_state *intel_state = to_intel_atomic_state(state); + struct skl_ddb_allocation *new_ddb = &intel_state->wm_results.ddb; + struct skl_ddb_allocation *cur_ddb = &dev_priv->wm.skl_hw.ddb; + struct drm_plane_state *plane_state; + struct drm_plane *plane; + enum pipe pipe = intel_crtc->pipe; + int id; + + WARN_ON(!drm_atomic_get_existing_crtc_state(state, crtc)); + + drm_for_each_plane_mask(plane, dev, crtc->state->plane_mask) { + id = skl_wm_plane_id(to_intel_plane(plane)); + + if (skl_ddb_entry_equal(&cur_ddb->plane[pipe][id], + &new_ddb->plane[pipe][id]) && + skl_ddb_entry_equal(&cur_ddb->y_plane[pipe][id], + &new_ddb->y_plane[pipe][id])) + continue; + + plane_state = drm_atomic_get_plane_state(state, plane); + if (IS_ERR(plane_state)) + return PTR_ERR(plane_state); + } + + return 0; +} + static int skl_compute_ddb(struct drm_atomic_state *state) { @@ -4004,7 +4039,7 @@ skl_compute_ddb(struct drm_atomic_state if (ret) return ret; - ret = drm_atomic_add_affected_planes(state, &intel_crtc->base); + ret = skl_ddb_add_affected_planes(cstate); if (ret) return ret; }