From patchwork Tue Mar 12 02:21:59 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 10848509 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4EABA17DF for ; Tue, 12 Mar 2019 02:23:52 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3B9A6292BF for ; Tue, 12 Mar 2019 02:23:52 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 2D7992930D; Tue, 12 Mar 2019 02:23:52 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id B643D292BF for ; Tue, 12 Mar 2019 02:23:51 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 8776F89996; Tue, 12 Mar 2019 02:23:50 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id 29D1E89996 for ; Tue, 12 Mar 2019 02:23:48 +0000 (UTC) Received: from localhost.localdomain (unknown [IPv6:2804:431:9719:798c:6bb0:a97a:4a09:e6d8]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id CFCD326F5EE; Tue, 12 Mar 2019 02:23:39 +0000 (GMT) From: Helen Koike To: dri-devel@lists.freedesktop.org, nicholas.kazlauskas@amd.com Subject: [PATCH v2 1/5] drm/rockchip: fix fb references in async update Date: Mon, 11 Mar 2019 23:21:59 -0300 Message-Id: <20190312022204.2775-2-helen.koike@collabora.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312022204.2775-1-helen.koike@collabora.com> References: <20190312022204.2775-1-helen.koike@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?St=C3=A9phane_Marchesin?= , Sean Paul , David Airlie , daniel.vetter@ffwll.ch, linux-kernel@vger.kernel.org, Tomasz Figa , linux-rockchip@lists.infradead.org, Helen Koike , boris.brezillon@collabora.com, kernel@collabora.com, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP In the case of async update, modifications are done in place, i.e. in the current plane state, so the new_state is prepared and the new_state is cleanup up (instead of the old_state, diferrently on what happen in a normal sync update). To cleanup the old_fb properly, it needs to be placed in the new_state in the end of async_update, so cleanup call will unreference the old_fb correctly. Also, the previous code had a: plane_state = plane->funcs->atomic_duplicate_state(plane); ... swap(plane_state, plane->state); if (plane->state->fb && plane->state->fb != new_state->fb) { ... } Which was wrong, as the fb were just assigned to be equal, so this if statement nevers evaluates to true. Another details is that the function drm_crtc_vblank_get() can only be called when vop->is_enabled is true, otherwise it has no effect and trows a WARN_ON(). Calling drm_atomic_set_fb_for_plane() (which get a referent of the new fb and pus the old fb) is not required, as it is taken care by drm_mode_cursor_universal() when calling drm_atomic_helper_update_plane(). Signed-off-by: Helen Koike --- Hello, I tested on the rockchip ficus v1.1 using igt plane_cursor_legacy and kms_cursor_legacy and I didn't see any regressions. Changes in v2: None drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 42 ++++++++++++--------- 1 file changed, 24 insertions(+), 18 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index c7d4c6073ea5..a1ee8c156a7b 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -912,30 +912,31 @@ static void vop_plane_atomic_async_update(struct drm_plane *plane, struct drm_plane_state *new_state) { struct vop *vop = to_vop(plane->state->crtc); - struct drm_plane_state *plane_state; + struct drm_framebuffer *old_fb = plane->state->fb; - plane_state = plane->funcs->atomic_duplicate_state(plane); - plane_state->crtc_x = new_state->crtc_x; - plane_state->crtc_y = new_state->crtc_y; - plane_state->crtc_h = new_state->crtc_h; - plane_state->crtc_w = new_state->crtc_w; - plane_state->src_x = new_state->src_x; - plane_state->src_y = new_state->src_y; - plane_state->src_h = new_state->src_h; - plane_state->src_w = new_state->src_w; - - if (plane_state->fb != new_state->fb) - drm_atomic_set_fb_for_plane(plane_state, new_state->fb); - - swap(plane_state, plane->state); - - if (plane->state->fb && plane->state->fb != new_state->fb) { + /* + * A scanout can still be occurring, so we can't drop the reference to + * the old framebuffer. To solve this we get a reference to old_fb and + * set a worker to release it later. + */ + if (vop->is_enabled && + plane->state->fb && plane->state->fb != new_state->fb) { drm_framebuffer_get(plane->state->fb); WARN_ON(drm_crtc_vblank_get(plane->state->crtc) != 0); drm_flip_work_queue(&vop->fb_unref_work, plane->state->fb); set_bit(VOP_PENDING_FB_UNREF, &vop->pending); } + plane->state->crtc_x = new_state->crtc_x; + plane->state->crtc_y = new_state->crtc_y; + plane->state->crtc_h = new_state->crtc_h; + plane->state->crtc_w = new_state->crtc_w; + plane->state->src_x = new_state->src_x; + plane->state->src_y = new_state->src_y; + plane->state->src_h = new_state->src_h; + plane->state->src_w = new_state->src_w; + plane->state->fb = new_state->fb; + if (vop->is_enabled) { rockchip_drm_psr_inhibit_get_state(new_state->state); vop_plane_atomic_update(plane, plane->state); @@ -945,7 +946,12 @@ static void vop_plane_atomic_async_update(struct drm_plane *plane, rockchip_drm_psr_inhibit_put_state(new_state->state); } - plane->funcs->atomic_destroy_state(plane, plane_state); + /* + * In async update we perform inplace modifications and release the + * new_state. The following is required so we release the reference of + * the old framebuffer. + */ + new_state->fb = old_fb; } static const struct drm_plane_helper_funcs plane_helper_funcs = { From patchwork Tue Mar 12 02:22:00 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 10848517 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4B6741823 for ; Tue, 12 Mar 2019 02:24:24 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 357A628B1B for ; Tue, 12 Mar 2019 02:24:24 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 294F128CBD; Tue, 12 Mar 2019 02:24:24 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id CCFC228B1B for ; Tue, 12 Mar 2019 02:24:23 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5E3A489B97; Tue, 12 Mar 2019 02:24:22 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id BD75389AEB; Tue, 12 Mar 2019 02:24:20 +0000 (UTC) Received: from localhost.localdomain (unknown [IPv6:2804:431:9719:798c:6bb0:a97a:4a09:e6d8]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 82239270BFB; Tue, 12 Mar 2019 02:24:10 +0000 (GMT) From: Helen Koike To: dri-devel@lists.freedesktop.org, nicholas.kazlauskas@amd.com Subject: [PATCH v2 2/5] drm/amd: fix fb references in async update Date: Mon, 11 Mar 2019 23:22:00 -0300 Message-Id: <20190312022204.2775-3-helen.koike@collabora.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312022204.2775-1-helen.koike@collabora.com> References: <20190312022204.2775-1-helen.koike@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?St=C3=A9phane_Marchesin?= , Sean Paul , David Airlie , daniel.vetter@ffwll.ch, David Francis , Mikita Lipski , linux-kernel@vger.kernel.org, amd-gfx@lists.freedesktop.org, Tomasz Figa , Bhawanpreet Lakha , Leo Li , Helen Koike , boris.brezillon@collabora.com, Alex Deucher , kernel@collabora.com, =?utf-8?q?C?= =?utf-8?q?hristian_K=C3=B6nig?= , Anthony Koo Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Async update callbacks are expected to set the old_fb in the new_state so prepare/cleanup framebuffers are balanced. Calling drm_atomic_set_fb_for_plane() (which gets a reference of the new fb and put the old fb) is not required, as it's taken care by drm_mode_cursor_universal() when calling drm_atomic_helper_update_plane(). Suggested-by: Boris Brezillon Signed-off-by: Helen Koike Reviewed-by: Nicholas Kazlauskas --- Changes in v2: - added reviewed-by tag drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index 3a6f595f295e..bc02800254bf 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -3760,8 +3760,7 @@ static void dm_plane_atomic_async_update(struct drm_plane *plane, struct drm_plane_state *old_state = drm_atomic_get_old_plane_state(new_state->state, plane); - if (plane->state->fb != new_state->fb) - drm_atomic_set_fb_for_plane(plane->state, new_state->fb); + swap(plane->state->fb, new_state->fb); plane->state->src_x = new_state->src_x; plane->state->src_y = new_state->src_y; From patchwork Tue Mar 12 02:22:01 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 10848525 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id CFF761823 for ; Tue, 12 Mar 2019 02:24:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BC89E2925A for ; Tue, 12 Mar 2019 02:24:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id B014F292BF; Tue, 12 Mar 2019 02:24:49 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 6575A2930D for ; Tue, 12 Mar 2019 02:24:49 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 41EB289D1D; Tue, 12 Mar 2019 02:24:48 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8C8AC89D1D; Tue, 12 Mar 2019 02:24:47 +0000 (UTC) Received: from localhost.localdomain (unknown [IPv6:2804:431:9719:798c:6bb0:a97a:4a09:e6d8]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id C2D07270BFB; Tue, 12 Mar 2019 02:24:37 +0000 (GMT) From: Helen Koike To: dri-devel@lists.freedesktop.org, nicholas.kazlauskas@amd.com Subject: [PATCH v2 3/5] drm/msm: fix fb references in async update Date: Mon, 11 Mar 2019 23:22:01 -0300 Message-Id: <20190312022204.2775-4-helen.koike@collabora.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312022204.2775-1-helen.koike@collabora.com> References: <20190312022204.2775-1-helen.koike@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?St=C3=A9phane_Marchesin?= , Sean Paul , David Airlie , daniel.vetter@ffwll.ch, Russell King , linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tomasz Figa , freedreno@lists.freedesktop.org, Helen Koike , boris.brezillon@collabora.com, Mamta Shukla , linux-arm-msm@vger.kernel.org, Sean Paul , kernel@collabora.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Async update callbacks are expected to set the old_fb in the new_state so prepare/cleanup framebuffers are balanced. Cc: # v4.14+ Fixes: 224a4c970987 ("drm/msm: update cursors asynchronously through atomic") Suggested-by: Boris Brezillon Signed-off-by: Helen Koike --- Hello, As mentioned in the cover letter, But I couldn't test on MSM because I don't have the hardware and I would appreciate if anyone could test it. In other platforms (VC4, AMD, Rockchip), there is a hidden drm_framebuffer_get(new_fb)/drm_framebuffer_put(old_fb) in async_update that is wrong, but I couldn't identify those here, not sure if it is hidden somewhere else, but if tests fail this is probably the cause. Thanks! Helen Changes in v2: - update CC stable and Fixes tag drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c index be13140967b4..b854f471e9e5 100644 --- a/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c +++ b/drivers/gpu/drm/msm/disp/mdp5/mdp5_plane.c @@ -502,6 +502,8 @@ static int mdp5_plane_atomic_async_check(struct drm_plane *plane, static void mdp5_plane_atomic_async_update(struct drm_plane *plane, struct drm_plane_state *new_state) { + struct drm_framebuffer *old_fb = plane->state->fb; + plane->state->src_x = new_state->src_x; plane->state->src_y = new_state->src_y; plane->state->crtc_x = new_state->crtc_x; @@ -524,6 +526,8 @@ static void mdp5_plane_atomic_async_update(struct drm_plane *plane, *to_mdp5_plane_state(plane->state) = *to_mdp5_plane_state(new_state); + + new_state->fb = old_fb; } static const struct drm_plane_helper_funcs mdp5_plane_helper_funcs = { From patchwork Tue Mar 12 02:22:02 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 10848529 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 036BF1515 for ; Tue, 12 Mar 2019 02:25:15 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id E31F72925A for ; Tue, 12 Mar 2019 02:25:14 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id D42E6292FE; Tue, 12 Mar 2019 02:25:14 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 716352925A for ; Tue, 12 Mar 2019 02:25:14 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D0D9789AEB; Tue, 12 Mar 2019 02:25:12 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id DF5EC89AEB for ; Tue, 12 Mar 2019 02:25:10 +0000 (UTC) Received: from localhost.localdomain (unknown [IPv6:2804:431:9719:798c:6bb0:a97a:4a09:e6d8]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id F04D92725FA; Tue, 12 Mar 2019 02:25:01 +0000 (GMT) From: Helen Koike To: dri-devel@lists.freedesktop.org, nicholas.kazlauskas@amd.com Subject: [PATCH v2 4/5] drm/vc4: fix fb references in async update Date: Mon, 11 Mar 2019 23:22:02 -0300 Message-Id: <20190312022204.2775-5-helen.koike@collabora.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312022204.2775-1-helen.koike@collabora.com> References: <20190312022204.2775-1-helen.koike@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?St=C3=A9phane_Marchesin?= , Sean Paul , David Airlie , daniel.vetter@ffwll.ch, linux-kernel@vger.kernel.org, stable@vger.kernel.org, Tomasz Figa , Helen Koike , boris.brezillon@collabora.com, kernel@collabora.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Async update callbacks are expected to set the old_fb in the new_state so prepare/cleanup framebuffers are balanced. Calling drm_atomic_set_fb_for_plane() (which gets a reference of the new fb and put the old fb) is not required, as it's taken care by drm_mode_cursor_universal() when calling drm_atomic_helper_update_plane(). Cc: # v4.19+ Fixes: 539c320bfa97 ("drm/vc4: update cursors asynchronously through atomic") Suggested-by: Boris Brezillon Signed-off-by: Helen Koike Reviewed-by: Boris Brezillon --- Hello, I tested on a Raspberry Pi model B rev2 with igt plane_cursor_legacy and kms_cursor_legacy and I didn't see any regressions. Changes in v2: - Added reviewed-by tag - updated CC stable and Fixes tag drivers/gpu/drm/vc4/vc4_plane.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c index 1babfeca0c92..1235e53b22a3 100644 --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -968,7 +968,7 @@ static void vc4_plane_atomic_async_update(struct drm_plane *plane, { struct vc4_plane_state *vc4_state, *new_vc4_state; - drm_atomic_set_fb_for_plane(plane->state, state->fb); + swap(plane->state->fb, state->fb); plane->state->crtc_x = state->crtc_x; plane->state->crtc_y = state->crtc_y; plane->state->crtc_w = state->crtc_w; From patchwork Tue Mar 12 02:22:03 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Helen Koike X-Patchwork-Id: 10848531 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 8DDC51515 for ; Tue, 12 Mar 2019 02:26:11 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 795C82925A for ; Tue, 12 Mar 2019 02:26:11 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 6B0492930D; Tue, 12 Mar 2019 02:26:11 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id ED290292BF for ; Tue, 12 Mar 2019 02:26:10 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 444B989D60; Tue, 12 Mar 2019 02:26:09 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 162E189D60; Tue, 12 Mar 2019 02:26:07 +0000 (UTC) Received: from localhost.localdomain (unknown [IPv6:2804:431:9719:798c:6bb0:a97a:4a09:e6d8]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: koike) by bhuna.collabora.co.uk (Postfix) with ESMTPSA id 53278270BFB; Tue, 12 Mar 2019 02:25:49 +0000 (GMT) From: Helen Koike To: dri-devel@lists.freedesktop.org, nicholas.kazlauskas@amd.com Subject: [PATCH v2 5/5] drm: don't block fb changes for async plane updates Date: Mon, 11 Mar 2019 23:22:03 -0300 Message-Id: <20190312022204.2775-6-helen.koike@collabora.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190312022204.2775-1-helen.koike@collabora.com> References: <20190312022204.2775-1-helen.koike@collabora.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sean Paul , David Airlie , daniel.vetter@ffwll.ch, linux-kernel@vger.kernel.org, kernel@collabora.com, Maxime Ripard , amd-gfx@lists.freedesktop.org, linux-rockchip@lists.infradead.org, linux-arm-msm@vger.kernel.org, Helen Koike , Sean Paul , linux-arm-kernel@lists.infradead.org, =?utf-8?q?St=C3=A9phane_Marchesin?= , stable@vger.kernel.org, Tomasz Figa , boris.brezillon@collabora.com, freedreno@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP In the case of a normal sync update, the preparation of framebuffers (be it calling drm_atomic_helper_prepare_planes() or doing setups with drm_framebuffer_get()) are performed in the new_state and the respective cleanups are performed in the old_state. In the case of async updates, the preparation is also done in the new_state but the cleanups are done in the new_state (because updates are performed in place, i.e. in the current state). The current code blocks async udpates when the fb is changed, turning async updates into sync updates, slowing down cursor updates and introducing regressions in igt tests with errors of type: "CRITICAL: completed 97 cursor updated in a period of 30 flips, we expect to complete approximately 15360 updates, with the threshold set at 7680" Fb changes in async updates were prevented to avoid the following scenario: - Async update, oldfb = NULL, newfb = fb1, prepare fb1, cleanup fb1 - Async update, oldfb = fb1, newfb = fb2, prepare fb2, cleanup fb2 - Non-async commit, oldfb = fb2, newfb = fb1, prepare fb1, cleanup fb2 (wrong) Where we have a single call to prepare fb2 but double cleanup call to fb2. To solve the above problems, instead of blocking async fb changes, we place the old framebuffer in the new_state object, so when the code performs cleanups in the new_state it will cleanup the old_fb and we will have the following scenario instead: - Async update, oldfb = NULL, newfb = fb1, prepare fb1, no cleanup - Async update, oldfb = fb1, newfb = fb2, prepare fb2, cleanup fb1 - Non-async commit, oldfb = fb2, newfb = fb1, prepare fb1, cleanup fb2 Where calls to prepare/cleanup are balanced. Cc: # v4.14+ Fixes: 25dc194b34dd ("drm: Block fb changes for async plane updates") Suggested-by: Boris Brezillon Signed-off-by: Helen Koike Reviewed-by: Boris Brezillon Reviewed-by: Nicholas Kazlauskas --- Hello, As mentioned in the cover letter, I tested in almost all platforms with igt plane_cursor_legacy and kms_cursor_legacy and I didn't see any regressions. But I couldn't test on MSM and AMD because I don't have the hardware I would appreciate if anyone could help me testing those. Thanks! Helen Changes in v2: - Change the order of the patch in the series, add this as the last one. - Add documentation - s/ballanced/balanced drivers/gpu/drm/drm_atomic_helper.c | 20 ++++++++++---------- include/drm/drm_modeset_helper_vtables.h | 5 +++++ 2 files changed, 15 insertions(+), 10 deletions(-) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 540a77a2ade9..e7eb96f1efc2 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1608,15 +1608,6 @@ int drm_atomic_helper_async_check(struct drm_device *dev, old_plane_state->crtc != new_plane_state->crtc) return -EINVAL; - /* - * FIXME: Since prepare_fb and cleanup_fb are always called on - * the new_plane_state for async updates we need to block framebuffer - * changes. This prevents use of a fb that's been cleaned up and - * double cleanups from occuring. - */ - if (old_plane_state->fb != new_plane_state->fb) - return -EINVAL; - funcs = plane->helper_private; if (!funcs->atomic_async_update) return -EINVAL; @@ -1657,6 +1648,9 @@ void drm_atomic_helper_async_commit(struct drm_device *dev, int i; for_each_new_plane_in_state(state, plane, plane_state, i) { + struct drm_framebuffer *new_fb = plane_state->fb; + struct drm_framebuffer *old_fb = plane->state->fb; + funcs = plane->helper_private; funcs->atomic_async_update(plane, plane_state); @@ -1665,11 +1659,17 @@ void drm_atomic_helper_async_commit(struct drm_device *dev, * plane->state in-place, make sure at least common * properties have been properly updated. */ - WARN_ON_ONCE(plane->state->fb != plane_state->fb); + WARN_ON_ONCE(plane->state->fb != new_fb); WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x); WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y); WARN_ON_ONCE(plane->state->src_x != plane_state->src_x); WARN_ON_ONCE(plane->state->src_y != plane_state->src_y); + + /* + * Make sure the FBs have been swapped so that cleanups in the + * new_state performs a cleanup in the old FB. + */ + WARN_ON_ONCE(plane_state->fb != old_fb); } } EXPORT_SYMBOL(drm_atomic_helper_async_commit); diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index cfb7be40bed7..ce582e8e8f2f 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -1174,6 +1174,11 @@ struct drm_plane_helper_funcs { * current one with the new plane configurations in the new * plane_state. * + * Drivers should also swap the framebuffers between plane state + * and new_state. This is required because prepare and cleanup calls + * are performed on the new_state object, then to cleanup the old + * framebuffer, it needs to be placed inside the new_state object. + * * FIXME: * - It only works for single plane updates * - Async Pageflips are not supported yet