From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender6-op-o11.zoho.com (sender6-op-o11.zoho.com [165.173.180.11]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5488A3C3F7D for ; Fri, 11 Sep 2026 23:29:17 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=165.173.180.11 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789169359; cv=pass; b=ZSRdGDCxlbG41Jx7TBNNXtS5iUaaDUjvjv8TbrNfe3TQObkdVjMI7kyeuw8wvR046lLoe/+Ek/XUDVWc15gU07fH7rSq0eLgQZ+M27Pw+rDWZK01pb1vzB0qDb9OkjE7wRepjfGxaSOCv3/z5MqOdvf3+M0F+6icMagFAfH+xo8= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789169359; c=relaxed/simple; bh=rGbyQBkNbY5a1OXBSal5Mure3AlHLFxQtfgc5Bhzvks=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=KMw0szCqNxoSJG7+aH2iI9XWgGLOo2Njk4awCDqFekfkSMI3x4EHmAe0+hd8Vau8/EGjdtYKc2dD/YgPvSl913BE3JiaKZRB3I9mhPR3O/dYIh4jfUKdQw1yoXUF0RJY8JnD0eadc7axHdLS8NBb8h3L5DwtqIAch/f+cNDWdoM= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b=OSpO+nDb; arc=pass smtp.client-ip=165.173.180.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=collabora.com header.i=adrian.larumbe@collabora.com header.b="OSpO+nDb" ARC-Seal: i=1; a=rsa-sha256; t=1789169325; cv=none; d=zohomail.com; s=zohoarc; b=O5cMLdAMoDUutx0+TZxZxWQy6QyLTq80pweXOoEWL8Wh1NmhXLsmzFhm+6vbg4/S8VfsPqsKkSYSa9hamPW9vK77ZvT6GjZPn1eTRn6TJ8Z/38Q6yOXaoHSknnsnyx4pUDx4jp28qZGgxyVjJWHJZR6T+jp2HRdHvrD5OZSejbc= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1789169325; h=Content-Type:Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:In-Reply-To:MIME-Version:Message-ID:Subject:Subject:To:To:Message-Id:Reply-To; bh=YLJJEy7HObDD1CKVtOGtdrfPLM+ZQOVKX8SKLnJRFuQ=; b=Ns9ICgC+pzFg1/yXpsoEyr9bvcwGhIC3tW51M0uq7VEYsninoZtRyMcOyU8AO548dlWdM0fpfO2AUFQtGoP881pTSIhP4bBZqEMcz6oh1Jim5OrMjgwmJQNdeGefZCyPjJZ6jVw71T9FrUPP1uVrAfaWe+SNN/7wQ1wmVYv01OY= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass header.i=collabora.com; spf=pass smtp.mailfrom=adrian.larumbe@collabora.com; dmarc=pass header.from= DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; t=1789169325; s=zohomail; d=collabora.com; i=adrian.larumbe@collabora.com; h=From:From:Date:Date:Subject:Subject:MIME-Version:Content-Type:Content-Transfer-Encoding:Message-Id:Message-Id:In-Reply-To:To:To:Cc:Cc:Reply-To; bh=YLJJEy7HObDD1CKVtOGtdrfPLM+ZQOVKX8SKLnJRFuQ=; b=OSpO+nDbjm2r8l7mkKIyJCujhuLFgB8OxrhQ2lGVZWFVRFpJViQza7tPy7ns1RKE 8WAiJH4r81CPXGHruIVYHrai58qe0O6qgDp80qajGOVHr1wbb6v94Ps4aULAyWYi3aT Z5jIEVkIUokJ8c4wFKqOivm3GgXXEdSHf22Sdauw= Received: by mx.zohomail.com with SMTPS id 1789169324521206.45016185233806; Fri, 11 Sep 2026 16:28:44 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= Date: Sat, 12 Sep 2026 00:28:08 +0100 Subject: [PATCH v9 07/16] drm/panfrost: Explicitly enable MMU interrupts at device init Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Message-Id: <20260912-claude-fixes-v9-7-e588feaa61ef@collabora.com> References: <20260912-claude-fixes-v9-0-e588feaa61ef@collabora.com> In-Reply-To: <20260912-claude-fixes-v9-0-e588feaa61ef@collabora.com> To: Boris Brezillon , Rob Herring , Steven Price , Maarten Lankhorst , Maxime Ripard , Thomas Zimmermann , David Airlie , Simona Vetter , Faith Ekstrand , "Marty E. Plummer" , Tomeu Vizoso , Eric Anholt , Alyssa Rosenzweig , Robin Murphy , Philipp Zabel Cc: dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Collabora Kernel Team , =?utf-8?q?Adri=C3=A1n_Larumbe?= , Neil Armstrong X-Mailer: b4 0.15.2 X-Developer-Signature: v=1; a=openpgp-sha256; l=1801; i=adrian.larumbe@collabora.com; h=from:subject:message-id; bh=rGbyQBkNbY5a1OXBSal5Mure3AlHLFxQtfgc5Bhzvks=; b=owEB7QES/pANAwAKAQ4mfkzuU0M9AcsmYgBqpI6DzEr/T1iUFVkI2QPrIHIjMCvGnDL6nJbhV Va0sFemfgOJAbMEAAEKAB0WIQQyQDDowAUXXfk3B6QOJn5M7lNDPQUCaqSOgwAKCRAOJn5M7lND PcJlC/oCi3WiKFWYZgTrnQ2gv+Tw4xWT9OHb9rRQzRnac/kwfT/VZ5l8Ba/N9P32EgoK8zeOJgf 9AiBzya4Aai/R42StuSPTxzOaEsL8acTMrg1EQEokOOEsNvYA5cHD0mruPRvFzUyxHZwspEBxbK uR1qkk221tS6yy4xhTpoHX4Cn6jth82RddCvvVRzx2JYIWkUnbfqPk5xzFIJK6O72Z3B5OixdoF tQevfDZUCUomgHigJDkEohbstluxPmatrN9TetSwAVuCabW+OVczoxzSEfEVNDbgPWrHrV1E2iW 4uWzaVf2oISrHckaHOoAnUQa75M3zybRXNit5lg1EQKz+WsO7hwXvMeLJVPnpYo6atimFj+uaxa dxpx/YhCQLD72qHgqcqVxfSEtV6K7zSB+97MBQrt5GBd5RszpeuZfJr44HmR9Y2CdtToM1kxtuH RPNbT9JYrMdgU/wdBE9YucNWjkxDldQJQzyWXn0YVYlcWGCmc20nBxIcTZyKKghtCUcFQ= X-Developer-Key: i=adrian.larumbe@collabora.com; a=openpgp; fpr=324030E8C005175DF93707A40E267E4CEE53433D Because the device must be in a position to accept jobs between the time drm_dev_register() is called and autosuspend first kicks in, there's a very narrow window inbetween during which jobs targeting the tiler buffer object would time out, since the device's PM status is 'Active', but no MMU interrupts were enabled at device initialisation time. Reviewed-by: Boris Brezillon Signed-off-by: Adrián Larumbe Fixes: 73e467f60acd ("drm/panfrost: Consolidate reset handling") --- drivers/gpu/drm/panfrost/panfrost_mmu.c | 11 +++++++++-- 1 file changed, 9 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_mmu.c b/drivers/gpu/drm/panfrost/panfrost_mmu.c index 5c393ed6e310..faa62643caf1 100644 --- a/drivers/gpu/drm/panfrost/panfrost_mmu.c +++ b/drivers/gpu/drm/panfrost/panfrost_mmu.c @@ -336,6 +336,12 @@ void panfrost_mmu_as_put(struct panfrost_device *pfdev, struct panfrost_mmu *mmu WARN_ON(atomic_read(&mmu->as_count) < 0); } +static void panfrost_mmu_enable_interrupts(struct panfrost_device *pfdev) +{ + mmu_write(pfdev, MMU_INT_CLEAR, ~0); + mmu_write(pfdev, MMU_INT_MASK, ~0); +} + void panfrost_mmu_reset(struct panfrost_device *pfdev) { struct panfrost_mmu *mmu, *mmu_tmp; @@ -355,8 +361,7 @@ void panfrost_mmu_reset(struct panfrost_device *pfdev) spin_unlock(&pfdev->as_lock); - mmu_write(pfdev, MMU_INT_CLEAR, ~0); - mmu_write(pfdev, MMU_INT_MASK, ~0); + panfrost_mmu_enable_interrupts(pfdev); } static size_t get_pgsize(u64 addr, size_t size, size_t *count) @@ -973,6 +978,8 @@ int panfrost_mmu_init(struct panfrost_device *pfdev) return err; } + panfrost_mmu_enable_interrupts(pfdev); + return 0; } -- 2.55.0