From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from sender4-op-o11.zoho.com (sender4-op-o11.zoho.com [136.143.188.11]) (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 B1437394793 for ; Wed, 26 Aug 2026 21:20:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=pass smtp.client-ip=136.143.188.11 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787779214; cv=pass; b=hH48gDB6pTIoZxY0qTnFFX8V9EH1wpKWztgxXizCEUi9/ECTZCUogH8HTFc3nE2orUnHjD8cJJ7ktILG0LRhE3ZQOF6DGfxRpRG1KgsfbgMePVLBCpuL2N9Q6kUSzDeWaGZT4qfcHjbz6RL80bwoET6qrviunQhAh/bp2geLyBs= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787779214; c=relaxed/simple; bh=1ViKXn5Z9t7QEwpx1D0niBppUD0kk1O7SjFsLfT8ejE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=nFckm/ayFET8tEMdR4xwzOa70mIZdvYkb/hk1c1Yl1jX8VCLsh0qYoGvtGx3nnleivNOeKYWu2k6PHnViLUJxRd2OdTzEYPR+OJEpGWLIcxo4zIBgzICkXtmFG1TbFhRFFB7A3vr0UM4S4u8kjxzJOYH1JCdXDSpTq9PwYEwUuE= 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=U4IR34ZG; arc=pass smtp.client-ip=136.143.188.11 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="U4IR34ZG" ARC-Seal: i=1; a=rsa-sha256; t=1787779174; cv=none; d=zohomail.com; s=zohoarc; b=dzDf/A6gDYd86QvQ/MfLWanWD7A+YpKvRu9KMVTjihz86R+0C+3EtsDT1Nc2eyE8sQSw5cumOMRxTr0nUQsfZ7EVrRZNLm9Mm64Cw6lQc9w6dj1hBpd7vhCgDkmU66RiE9U3TFQrwbUp/fIxxiLlKF2hSdW+EwD4cupcZ/KA9PE= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1787779174; 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=g1FXZ9snXF2f2DkW+ebuDO+prz5XwthtDAwYa3OAmL8=; b=K8HSN45vLxShZtS3+gFRmgcLap1dW/smpGitQ4Ps3f/F+doyVb6hlkg/iLc04wrIp6asewG2BvTU2Ou998Z9AMhoEbl3qL+6iv+ohX9Agl2yQ42eAVlArnQR19PdVGpMKAYwrOQ/bRMLcYThBMN0cwSkeS7cgvB6XuRiyClvm+w= 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=1787779174; 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=g1FXZ9snXF2f2DkW+ebuDO+prz5XwthtDAwYa3OAmL8=; b=U4IR34ZGyI1N6ji44y0jXPyikPvzwifLqkPIpWoguLDYX/Lveygh+TWhHVTA+fcC 392cU31brC4wKSf2JkdDHHSNYjAix3P9jCondFUXny7auH4RXGuWX/gif7ft2ZES2AE y2QC+caMgiv6J2tofla5CKcd8ZCSqvd1L7yC1h5M= Received: by mx.zohomail.com with SMTPS id 1787779173167251.50782691295262; Wed, 26 Aug 2026 14:19:33 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= Date: Wed, 26 Aug 2026 22:18:15 +0100 Subject: [PATCH v6 13/16] drm/panfrost: Avoid cache flush after perfcnt sample in fully coherent systems 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: <20260826-claude-fixes-v6-13-78119af409e7@collabora.com> References: <20260826-claude-fixes-v6-0-78119af409e7@collabora.com> In-Reply-To: <20260826-claude-fixes-v6-0-78119af409e7@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=1026; i=adrian.larumbe@collabora.com; h=from:subject:message-id; bh=1ViKXn5Z9t7QEwpx1D0niBppUD0kk1O7SjFsLfT8ejE=; b=owEB7QES/pANAwAKAQ4mfkzuU0M9AcsmYgBqj1gMFuKz+mvU4LI9nY4ViyhJBxWl2EU90niSf c4MKUbik7aJAbMEAAEKAB0WIQQyQDDowAUXXfk3B6QOJn5M7lNDPQUCao9YDAAKCRAOJn5M7lND PVx7C/sFykCT6g1swxOYk9LHjDxyph/jMYbWnrTYe3T5+1MkpIlR8XhlQL1xaU3b7cnIYoG+5e7 SeDEKC87AAdLYU84hLOuQ9qqUEeBXhy/QyTSxDOboHhYY+81ZzDRFf5WY0a2krry0IB07JyFhJx CJGPrquxkP5G7TWMPPQT125j5yIsqN3QKInwu8C3Qa5W8DBeJOzZ4XmghUJp5VaVIyxG+5E/6lF dQG15pT7lC3y3R5nh2TpZxKfyZl7NOd8Et+4CwCialQGaTEU42/jchDF6fR3F9jRlMjr9YNdbEI GFLde6oPZtdaVaeqS6eRFBWz1fALoXwcxe+RFwIieRJjH2dktI45YlbBrQnznrP2mDldehCX5Gu 1DRIUmJqdO2GBPPJobxyfOyCWD7+r69UpF+WkoICLJoq7FqMBS80/fXR5FzbxNNlwowe98/6ktO qjr64XHv7zyX0ShyC7gEiiju0YpK474Q8ZU+DHBvtrEJzkF07Fz6OnZ7417o0/lROcGbs= X-Developer-Key: i=adrian.larumbe@collabora.com; a=openpgp; fpr=324030E8C005175DF93707A40E267E4CEE53433D If the GPU and CPU are fully coherent, then there's no need to flush the GPU caches after a perfcnt sample is made available. Signed-off-by: Adrián Larumbe --- drivers/gpu/drm/panfrost/panfrost_perfcnt.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c index ffc77121070e..b3f71d7fd82a 100644 --- a/drivers/gpu/drm/panfrost/panfrost_perfcnt.c +++ b/drivers/gpu/drm/panfrost/panfrost_perfcnt.c @@ -52,7 +52,10 @@ void panfrost_perfcnt_clean_cache_done(struct panfrost_device *pfdev) void panfrost_perfcnt_sample_done(struct panfrost_device *pfdev) { - gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_CACHES); + if (pfdev->features.selected_coherency != COHERENCY_ACE) + gpu_write(pfdev, GPU_CMD, GPU_CMD_CLEAN_CACHES); + else + complete(&pfdev->perfcnt->dump_comp); } static int panfrost_perfcnt_dump_locked(struct panfrost_device *pfdev) -- 2.55.0