From patchwork Fri Jan 6 01:40:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Norris X-Patchwork-Id: 13090780 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id CE330C4708E for ; Fri, 6 Jan 2023 01:40:33 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5D7BC10E81C; Fri, 6 Jan 2023 01:40:31 +0000 (UTC) Received: from mail-pj1-x1033.google.com (mail-pj1-x1033.google.com [IPv6:2607:f8b0:4864:20::1033]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9860310E81C for ; Fri, 6 Jan 2023 01:40:27 +0000 (UTC) Received: by mail-pj1-x1033.google.com with SMTP id q64so103372pjq.4 for ; Thu, 05 Jan 2023 17:40:27 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=Vd1mAgVVTT449fHfx2SSArigVZjhQAUUxQLxBkWmUZY=; b=DPHGui8QRmvaHU3DjCknrlpCldx/5v2OWyAyXICYBob9XLXk8DRWNug04ad+L+D6QF yQtKJe2REavJ/0MCusreMlT5MSx/4G0eq24SxO0ufeBTun+1XdP7BTN6KqtS2fV34YPD cvqScEg2/NatNc3sAr34tTgsDmpFnKUJ2dcqQ= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=Vd1mAgVVTT449fHfx2SSArigVZjhQAUUxQLxBkWmUZY=; b=fLXs6+f5QuPHqszhvvBS4CKj9bkxumK7nQQAKc9HUPKPKHm2AD5b6MosUaq0CZ0WRU ZITquyWLdw+RAFQXQ8+J4B1MIPOl0oWcX9WS0V9mVEIlTnlfyA2rpUZz4IqbdLZkYcbk cesPFx7qWE3z0hK/2sN3o+PIgk4vxKwuoaGS3q58nb0UU/Ur8dawFRxGwY0DzB2JalZR nGL5Nw4vAi0Lv9Iimq29hQNyUxU4xGzDQJ/SaT3y/QkNEdH9SGYPKK4RIrrJiGCx5IkM hwuxQk4hbT/l/ZYhMcBAp2qp6iwuoS4h/Mxk/D+ILd0nj/uGRA5iDQkz2KTe0JDuianB LS6Q== X-Gm-Message-State: AFqh2kpH9NlzEeQAPycR+sEHSqslqu8OYN9HiDeNrxjKMpDz33xA7l1p Ai9Tl3nR5qkeKUL7tBVNLYaSfQ== X-Google-Smtp-Source: AMrXdXuA+H0C6hhXoQgKWSW+0hWutAD/Rw5+F2uGIQXQ1RV5rw8QgVaH85iAhFDqCwDsueI7WxmVcw== X-Received: by 2002:a05:6a20:429f:b0:ad:bd55:6dcf with SMTP id o31-20020a056a20429f00b000adbd556dcfmr79280084pzj.28.1672969227205; Thu, 05 Jan 2023 17:40:27 -0800 (PST) Received: from localhost ([2620:15c:9d:2:5567:fb20:aa4f:352]) by smtp.gmail.com with UTF8SMTPSA id i1-20020a6551c1000000b00478f87eaa44sm22461638pgq.35.2023.01.05.17.40.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Jan 2023 17:40:26 -0800 (PST) From: Brian Norris To: =?utf-8?q?Heiko_St=C3=BCbner?= , Sean Paul Subject: [PATCH 1/2] drm/atomic: Allow vblank-enabled + self-refresh "disable" Date: Thu, 5 Jan 2023 17:40:17 -0800 Message-Id: <20230105174001.1.I3904f697863649eb1be540ecca147a66e42bfad7@changeid> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?utf-8?q?Michel_D=C3=A4nzer?= , Brian Norris , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Sandy Huang , linux-rockchip@lists.infradead.org, stable@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" The self-refresh helper framework overloads "disable" to sometimes mean "go into self-refresh mode," and this mode activates automatically (e.g., after some period of unchanging display output). In such cases, the display pipe is still considered "on", and user-space is not aware that we went into self-refresh mode. Thus, users may expect that vblank-related features (such as DRM_IOCTL_WAIT_VBLANK) still work properly. However, we trigger the WARN_ONCE() here if a CRTC driver tries to leave vblank enabled here. Add a new exception, such that we allow CRTCs to be "disabled" (with self-refresh active) with vblank interrupts still enabled. Cc: # dependency for subsequent patch Signed-off-by: Brian Norris --- drivers/gpu/drm/drm_atomic_helper.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index d579fd8f7cb8..7b5eddadebd5 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -1207,6 +1207,12 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) if (!drm_dev_has_vblank(dev)) continue; + /* + * Self-refresh is not a true "disable"; let vblank remain + * enabled. + */ + if (new_crtc_state->self_refresh_active) + continue; ret = drm_crtc_vblank_get(crtc); WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n"); From patchwork Fri Jan 6 01:40:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Brian Norris X-Patchwork-Id: 13090781 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id AA736C3DA7A for ; Fri, 6 Jan 2023 01:40:39 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5475710E823; Fri, 6 Jan 2023 01:40:32 +0000 (UTC) Received: from mail-pf1-x42c.google.com (mail-pf1-x42c.google.com [IPv6:2607:f8b0:4864:20::42c]) by gabe.freedesktop.org (Postfix) with ESMTPS id D20F510E81C for ; Fri, 6 Jan 2023 01:40:29 +0000 (UTC) Received: by mail-pf1-x42c.google.com with SMTP id k19so84846pfg.11 for ; Thu, 05 Jan 2023 17:40:29 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=c8gCbSML/p6Kr09DdbXaCD2bHHww6ZP3H/AZnf3Fw7g=; b=glG7tzqprNLpK21tSwouvhh29Ru3oQMMT++WF/8EdyAe9E16EXDVV2gQ7MgD/YLbfD 7i5ORFsmWI/15TfC6bE9Zh+BDD8BK7F3Cr25qWSmjIrnEIqHKvXKZPM93FIz7er9IXb9 P09kmLdjasAmuSD6VJ5W6wIZSgZ1vfi8G3Cak= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=c8gCbSML/p6Kr09DdbXaCD2bHHww6ZP3H/AZnf3Fw7g=; b=r37eoAiQSoGH50m3HHGIUqfMH51PtvgfOL4VtmmnIyIzXHol/BnZpv5wmRkHNhQ8xE ua5IfsJKjn+A2ELhJeh9KJ6idh3cAYmBTS0zxKmFN+w7Y5d6GwRW7JAK1M6LBgnbW2mu sx9MPoqwfa0MhkNuXsRSWwtf0O7IcFtBacdj+xG/KoUwc3fBMcYUiI85PsyRUasw96XG t51cNi3YirxZtguGLlJW16c+J9QEtH0jkY9ti5p9awS0TZsCNpMHvQlY1uLCTrX1gqZq vqWxuJMU0wRqSfjQEYypK09rSmU+9Np4bgqS9ZmWCN/AKCY+0SBPnv3ITfsA3mKelPB8 XA8g== X-Gm-Message-State: AFqh2krALyMH9OyWV2CLAX3X8ki3HZkpE3kSS+4lApXJPKWhMlSQpQgi i4WU/UvHZ3W5CkFRTihu8+B8aQ== X-Google-Smtp-Source: AMrXdXvC7oDu6YyGV+8jfSbsR7fE2kCUxk5coKNVNbu0UAKMzyqM7NgLBCShEMc/OPWHessmN1xdtQ== X-Received: by 2002:a62:e510:0:b0:582:5b8d:52be with SMTP id n16-20020a62e510000000b005825b8d52bemr19080880pff.8.1672969229354; Thu, 05 Jan 2023 17:40:29 -0800 (PST) Received: from localhost ([2620:15c:9d:2:5567:fb20:aa4f:352]) by smtp.gmail.com with UTF8SMTPSA id 142-20020a621994000000b00575caf80d08sm17868008pfz.31.2023.01.05.17.40.28 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 05 Jan 2023 17:40:28 -0800 (PST) From: Brian Norris To: =?utf-8?q?Heiko_St=C3=BCbner?= , Sean Paul Subject: [PATCH 2/2] drm/rockchip: vop: Leave vblank enabled in self-refresh Date: Thu, 5 Jan 2023 17:40:18 -0800 Message-Id: <20230105174001.2.Ic07cba4ab9a7bd3618a9e4258b8f92ea7d10ae5a@changeid> X-Mailer: git-send-email 2.39.0.314.g84b9a713c41-goog In-Reply-To: <20230105174001.1.I3904f697863649eb1be540ecca147a66e42bfad7@changeid> References: <20230105174001.1.I3904f697863649eb1be540ecca147a66e42bfad7@changeid> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: "kernelci.org bot" , =?utf-8?q?Michel_D=C3=A4nzer?= , Brian Norris , linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, Sandy Huang , linux-rockchip@lists.infradead.org, stable@vger.kernel.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" If we disable vblank when entering self-refresh, vblank APIs (like DRM_IOCTL_WAIT_VBLANK) no longer work. But user space is not aware when we enter self-refresh, so this appears to be an API violation -- that DRM_IOCTL_WAIT_VBLANK fails with EINVAL whenever the display is idle and enters self-refresh. The downstream driver used by many of these systems never used to disable vblank for PSR, and in fact, even upstream, we didn't do that until radically redesigning the state machine in commit 6c836d965bad ("drm/rockchip: Use the helpers for PSR"). Thus, it seems like a reasonable API fix to simply restore that behavior, and leave vblank enabled. Note that this appears to potentially unbalance the drm_crtc_vblank_{off,on}() calls in some cases, but: (a) drm_crtc_vblank_on() documents this as OK and (b) if I do the naive balancing, I find state machine issues such that we're not in sync properly; so it's easier to take advantage of (a). Backporting notes: Marking as 'Fixes' commit 6c836d965bad ("drm/rockchip: Use the helpers for PSR"), but it probably depends on commit bed030a49f3e ("drm/rockchip: Don't fully disable vop on self refresh") as well. We also need the previous patch ("drm/atomic: Allow vblank-enabled + self-refresh "disable""), of course. Fixes: 6c836d965bad ("drm/rockchip: Use the helpers for PSR") Cc: Link: https://lore.kernel.org/dri-devel/Y5itf0+yNIQa6fU4@sirena.org.uk/ Reported-by: "kernelci.org bot" Signed-off-by: Brian Norris --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index fa1f4ee6d195..c541967114b4 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -719,11 +719,11 @@ static void vop_crtc_atomic_disable(struct drm_crtc *crtc, mutex_lock(&vop->vop_lock); - drm_crtc_vblank_off(crtc); - if (crtc->state->self_refresh_active) goto out; + drm_crtc_vblank_off(crtc); + /* * Vop standby will take effect at end of current frame, * if dsp hold valid irq happen, it means standby complete.