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 BD96C44065A for ; Fri, 25 Sep 2026 18:47:15 +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=1790362037; cv=pass; b=EnwvaJY/VtdI+9BgQT1rpFnpX6YNI6vw2KpHoqqQXcYvSbNeDFxAUIOtqdisrpHIYeq5SGYGSXH438FEr3NKmCGZwx4cB7YKDWEmzXFJc7WsfRmrMaE0Cys5cjH3MUKx5V3f/QHlwdcMQ0mMrxpXK/SCLYVFNEKAHUu6IHbgT/8= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1790362037; c=relaxed/simple; bh=ylClgdA4qjN8YjgAXTrojrPeuTeRxcjN/yXHiltT8+A=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:References: In-Reply-To:To:Cc; b=GWvZ67FiPGSD6IoWN3L8UzCIC1iCgnp79DOVav2xgpQGOs5CsIHezfsSDPT2ZV/5V4qJ6yW/RvBbF4RoEDnsHQCoAeItU9EeTTVBLk87HIwvJqfGOAK72K+LpAbEaZAAXay8/5T3HJI8lwbljG7WSgSHy+nTNRIqGqDAVPjd5ts= 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=HMMIiT+K; 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="HMMIiT+K" ARC-Seal: i=1; a=rsa-sha256; t=1790362008; cv=none; d=zohomail.com; s=zohoarc; b=IHBN+csVUTg+279zawL3cDeSj3I+h42I8zWI9kaGITyxdWn4+cv1rTSQbVbluH61s1MFC6NdkIjhydjkJs3plN3O357J3vooVKP2YpA7nLLMLcHMb0COkAndsW0hO7Z8gZF2r+ZnNUIxhLYsrH0tZK+SGiSPugTBRrCbHFiJ/ns= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1790362008; 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=rne2vTyla1RUI4gVDThBMRFsSeWjoijKTX5hYO0ZMA0=; b=AfgsyxHVwiQc0jlp5sarzRtiMBTck5vruXW8BLi+Tlt4B1LUy638nLH9w2SLWkCZrgiNoSZpeX04BrtctjFsfI2H549C1i6g3wCKuF2FB424X5kKiu8/sHRJwgf+6nyUhEQBZjZlSELZDccy0fe/jEg21Kwgt73+WBeU3Oe7JdU= 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=1790362008; 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=rne2vTyla1RUI4gVDThBMRFsSeWjoijKTX5hYO0ZMA0=; b=HMMIiT+KAeVfd7YnNqQC+6YvzJYbNvd5JYO9aCA+JN6v0UFwZX4R+5efmMLwP3gG QipkuJFqFmrljhcYnTano1mIDldr2gjaP9pXRmcdBBq2+ZwDZwaNoyr764z4a9kOR2F apcMuUQfXB8H5736eYq6l8rnuYgvlXurFB6kEs1Q= Received: by smtp.zohomail.com with SMTPS id 1790362006274552.8530406652147; Fri, 25 Sep 2026 11:46:46 -0700 (PDT) From: =?utf-8?q?Adri=C3=A1n_Larumbe?= Date: Fri, 25 Sep 2026 19:45:34 +0100 Subject: [PATCH v11 13/15] 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: <20260925-claude-fixes-v11-13-0dbf5a58e7ce@collabora.com> References: <20260925-claude-fixes-v11-0-0dbf5a58e7ce@collabora.com> In-Reply-To: <20260925-claude-fixes-v11-0-0dbf5a58e7ce@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=1088; i=adrian.larumbe@collabora.com; h=from:subject:message-id; bh=ylClgdA4qjN8YjgAXTrojrPeuTeRxcjN/yXHiltT8+A=; b=owEB7QES/pANAwAKAQ4mfkzuU0M9AcsmYgBqtsFEAvavFHQhpg2ui1rPxkirqK1B1MSHIvD+Y QpvGaqA2NKJAbMEAAEKAB0WIQQyQDDowAUXXfk3B6QOJn5M7lNDPQUCarbBRAAKCRAOJn5M7lND PeJzC/4+J5fRPwiul01r9JmRKJ5FWp+l0n9rLaXujhXp1BGHlcJdhPh2gXBXY9qZ10TlQbnCJN4 wctGmkmzvZZr7Q8uVOLbsPFTVWah81LA2auQN4NP4xM2muAl5SNp3vJYDvZQruoi/9Xy8290rTz 6Hc/KK3udAv5IWp+EOoeeZqLWHJQmKZEyPbior738UcqY79l+xwsjmsBhBYmJm5vB3p8JHyWeAs nbLAMtI/dcxdp8lO8y1sTRbU1AYIh2e5ZU04XEI4xG07ZJOQEjUxNNfb4JaKweDLsikKVpB1vyp LPe3wYI27TCplW2o7kKi8p5EDM3qx3Xsh1t5e3VC3GcpH72ekUUFnVJrqGo3oqPMVOi36C2tM2n fDIPPyWWCR7yugcxnpShE6WRj5IRI8a5zOGh6uNUpGkCKT9qfF45F9D+VpVUaIYGg9XVJ3bYOda eE5AUaX9W/7nYzXx64s/vm8H2R5LbCu1IPs7f8C8RiC1wK0GR8CXItHQV1WRdY4U7wlmo= 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. Reviewed-by: Boris Brezillon 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