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 CD39D3E1694 for ; Fri, 28 Aug 2026 20:59:21 +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=1787950763; cv=pass; b=k7GZ6DmoxPLTMI8i+BhPcg23B1zefs5+zSfB4WekpGYhDM+S+sKGcFDKozGdmgldDlYos40nGi8C2W8/2SMXSbms1iu8uBaWEP7zVbktpBjrJNoukYfph+HVMK6UTRKwTiwMjoo+YYexf6sXhBzq662gf+eYQRTzxt+KY/Dy1Ys= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1787950763; c=relaxed/simple; bh=1ViKXn5Z9t7QEwpx1D0niBppUD0kk1O7SjFsLfT8ejE=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=hoS5R+i9n/oz9wsrRmboDD4MYx0lwqEmgloVVt1Jfl007DtP+UR2/Wfxvi2TnYIf08YC+5+bS/ct+mLt+QPSw7CfXvbjpYxb3L0BcViZy3p5ZpXS0eiNeYaMpKOdSOzqieqzbCbM8sBMQmConeqLh4OEd/znF07tT2A4MQk4alw= 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=Ssh5MOxF; 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="Ssh5MOxF" ARC-Seal: i=1; a=rsa-sha256; t=1787950724; cv=none; d=zohomail.com; s=zohoarc; b=ihWMJdXHXG1y75aUd8QUpEOL6mlP7AzM8OV29vVS+wV0gnkkwDP3lT5IZH74LIUe5XYmTld/Mcw3CY+YNgvddx967nhQ4gtZycvSn9Tflnvh205yF27yf74cp7cXPZaPb4iIu+VIhWDLUv6cNGeHPB9n9ktDBsnZeJnZGj0Uv9I= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1787950724; 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=U0lteSYaY/aN0YXmkG6o+uDUFYmiGFmzagjyEd9ILidHZbzBJZXNH4byeBP868Ahg/Xb027hZv39C5mCRWVbgc/EUgEaagsIXmJs8ALikjGkfiUSw4QgqHaGVowaASzemfn/h+GrOfEo7uxKtzm3h3uY8yJRyO3p39/k3nQiFbc= 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=1787950724; 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=Ssh5MOxFY39U0wYs8YJLyuznYX7UXIg8jcJoC8UcN0vV1QMyWkzqzsOekX/BRk25 KRRkQaAdC/tehX/hK/FdNLiT8pXIZYHbNJmlIpWkclpWI1ASLDmfkaZafnE1j7lUAWS fRrU6G9CSlmWhQnLpYg3NJwjjNtJ7l14MV5Gi9fw= Received: by mx.zohomail.com with SMTPS id 1787950723708801.2739264428101; Fri, 28 Aug 2026 13:58:43 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= Date: Fri, 28 Aug 2026 21:56:54 +0100 Subject: [PATCH v7 14/17] 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: <20260828-claude-fixes-v7-14-72a13b2c125d@collabora.com> References: <20260828-claude-fixes-v7-0-72a13b2c125d@collabora.com> In-Reply-To: <20260828-claude-fixes-v7-0-72a13b2c125d@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/pANAwAKAQ4mfkzuU0M9AcsmYgBqkfYujL4JCDuAH0q8gGixNY3cI/Ii54ss93wh/ h5FFE+2UI+JAbMEAAEKAB0WIQQyQDDowAUXXfk3B6QOJn5M7lNDPQUCapH2LgAKCRAOJn5M7lND PYLNC/9ofecQOnZNGqSmVHcCSsOsyfB53a8QTHUQZJYMd+T/GTCtIDMQW5Cj4F47gMP0w1a4Xoa eihbfAVFCWTWR3s8moF+qWri4fsRf8O0+EwBNANvPwP7A0e7V7y8WIwvGCvlBkOt9jhA5FrW/CC TtffPgxF8CS/4QVfN8FKhotOGNRAm9dJr5+jlEf/JYNJ01D7+MVKy8A7ZCNIDRXlWaXvW9rfWD2 hg1Nv/X592hUZ6CS2Q86em9vWxCuuUrdRSzM/uftOpUEYe6fT+MoIKTkbl/aOMlQj8fkzKu2zOu oqfIL43+JB30aLtRMTudNm9RWuQUq9bW93GvHZKHF8kYT5Yf9OqBUbk2rGz/AN375K0PHxH08Sn EpPsCZtl4d3uHb7m4W6IabzZ379plGqHQBP9Q6WuT6gKLuQUJEpZEEnhfJ0QVbVWoQGjixhU9yt k8WbgQasvZzljMfzhIYsldJI8zVVEJKdY7XgDV0OmLlCaW+XHKcN7bPLRrBe6gc2pcdDs= 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