From mboxrd@z Thu Jan 1 00:00:00 1970 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 3406BD49233 for ; Fri, 12 Dec 2025 14:35:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 86CC010E8B9; Fri, 12 Dec 2025 14:35:20 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=lankhorst.se header.i=@lankhorst.se header.b="Q6zTncZ/"; dkim-atps=neutral Received: from lankhorst.se (lankhorst.se [141.105.120.124]) by gabe.freedesktop.org (Postfix) with ESMTPS id C59D010E31D; Fri, 12 Dec 2025 14:35:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=lankhorst.se; s=default; t=1765550114; bh=9MHCFxIequ3JUqIgGQhz95QVQawJLEEKvKygoqucuyk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Q6zTncZ/zQWxt8FBsLHABkcne2E0zWxho5adOjUrF6Lt4kyWh7d9Wu4Kik9SV/1Zn 9y8KAsSWDPq8U0Npjd8FX4rE/8+bQc+jzfJ2Y6dE0QjO5dIU8z91N0AdPvW6sgj3NW Hso/PiQM/2Hsg5Rq5mhDtZjMiNZH0GGi9n+dJghdA5AtD7nufbUxPqehRd59fCtTyA 4aYYdFMa4IJXTYsQ0EHfzjsPEk0ZQIQtbiw61SbBggE0LmtUTz1DMcYpQ4dlHSdqHI UelZBUDEWr0lPn8GzrYQqT9aRN8JZBkXbBvJWQBELTeapLvh1LqLu+eMdVkgWQEwBY vqFfpLGSBlgRw== From: Maarten Lankhorst To: intel-xe@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org, Sebastian Andrzej Siewior , Maarten Lankhorst Subject: [PATCH v2 02/12] drm/i915/display: Make get_vblank_counter use intel_de_read_fw() Date: Fri, 12 Dec 2025 15:35:06 +0100 Message-ID: <20251212143504.973839-16-dev@lankhorst.se> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20251212143504.973839-14-dev@lankhorst.se> References: <20251212143504.973839-14-dev@lankhorst.se> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" Fixes the following lockdep splat on PREEMPT_RT: <3> BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 <3> in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 1373, name: xe_module_load <3> preempt_count: 1, expected: 0 <3> RCU nest depth: 0, expected: 0 <4> 11 locks held by xe_module_load/1373: <4> #0: ffff888107b691a0 (&dev->mutex){....}-{3:3}, at: __driver_attach+0x104/0x220 <4> #1: ffff88813cd30280 (&dev->clientlist_mutex){+.+.}-{3:3}, at: drm_client_register+0x32/0xe0 <4> #2: ffffffff837f88f8 (registration_lock){+.+.}-{3:3}, at: register_framebuffer+0x1b/0x50 <4> #3: ffffffff835985e0 (console_lock){+.+.}-{0:0}, at: fbcon_fb_registered+0x6f/0x90 <4> #4: ffff88812589e6a0 (&helper->lock){+.+.}-{3:3}, at: __drm_fb_helper_restore_fbdev_mode_unlocked+0x7b/0x110 <4> #5: ffff88813cd30158 (&dev->master_mutex){+.+.}-{3:3}, at: drm_master_internal_acquire+0x20/0x50 <4> #6: ffff88812589e488 (&client->modeset_mutex){+.+.}-{3:3}, at: drm_client_modeset_commit_locked+0x2a/0x1b0 <4> #7: ffffc9000031eef0 (crtc_ww_class_acquire){+.+.}-{0:0}, at: drm_client_modeset_commit_atomic+0x4c/0x2b0 <4> #8: ffffc9000031ef18 (crtc_ww_class_mutex){+.+.}-{3:3}, at: drm_client_modeset_commit_atomic+0x4c/0x2b0 <4> #9: ffff888114f7b8b8 (&intel_dp->psr.lock){+.+.}-{3:3}, at: intel_psr_lock+0xc5/0xf0 [xe] <4> #10: ffff88812a0cbbc0 (&wl->lock){+.+.}-{2:2}, at: intel_dmc_wl_get+0x3c/0x140 [xe] This splat will happen otherwise on all tracepoints too, for similar reasons. Signed-off-by: Maarten Lankhorst --- drivers/gpu/drm/i915/display/intel_vblank.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c b/drivers/gpu/drm/i915/display/intel_vblank.c index 671f357c65638..2b106ffa3f5f5 100644 --- a/drivers/gpu/drm/i915/display/intel_vblank.c +++ b/drivers/gpu/drm/i915/display/intel_vblank.c @@ -133,7 +133,7 @@ u32 g4x_get_vblank_counter(struct drm_crtc *crtc) if (!vblank->max_vblank_count) return 0; - return intel_de_read(display, PIPE_FRMCOUNT_G4X(display, pipe)); + return intel_de_read_fw(display, PIPE_FRMCOUNT_G4X(display, pipe)); } static u32 intel_crtc_scanlines_since_frame_timestamp(struct intel_crtc *crtc) -- 2.51.0