From patchwork Fri Dec 1 01:07:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paloma Arellano X-Patchwork-Id: 13475254 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="HdxyHUjq" Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 4E44C10D9 for ; Thu, 30 Nov 2023 17:08:59 -0800 (PST) Received: from pps.filterd (m0279862.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3B10sa4j011035; Fri, 1 Dec 2023 01:08:18 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=S6M8nEPOrFcZoYBRUnK/QHXgxoC6LrftMDDaXulwOgY=; b=HdxyHUjq4kgU9xaBmhislNlf6B2+XpaxqIf9Xh2NDMcy1nLfTJwuh5fwerKkGC1nJHnD y8X3F8udcaTHKSneurs659ZPc6IKUtVktEXd8MEBMv0IxgMCDdSQcvQ4Ju4iy7uVrlri S8bKRFCpJuPzTv7QI/k1C2Ic1IbeoCzBkNsB0Bi2cm6LFp/hNjsxaMB1b3kXDo978NXX Nv4YK7F0a0rTHuTvz8z9S+RMvt4Z7SAz5wTD5xOmNdXpgqM94dHxsw2AkNEr3KN2rRRh k6OW4E30PZIusdb4e6hLgWrdWZKWjMQGpm1NqhUIRE0IdLuK5RDJFyFAkrNz7PO9kneX +A== Received: from nalasppmta01.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3upjsqu069-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Dec 2023 01:08:17 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3B118Hhe007675 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 1 Dec 2023 01:08:17 GMT Received: from hu-parellan-lv.qualcomm.com (10.49.16.6) by nalasex01a.na.qualcomm.com (10.47.209.196) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 30 Nov 2023 17:08:16 -0800 From: Paloma Arellano To: CC: Paloma Arellano , , , , , , , , , , Subject: [PATCH 0/2] Stabilize use of vblank_refcount Date: Thu, 30 Nov 2023 17:07:52 -0800 Message-ID: <20231201010758.1703-1-quic_parellan@quicinc.com> X-Mailer: git-send-email 2.41.0 Precedence: bulk X-Mailing-List: linux-arm-msm@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: gaKZ8S6RD8NylGberkW40qDDCi_c-qZx X-Proofpoint-ORIG-GUID: gaKZ8S6RD8NylGberkW40qDDCi_c-qZx X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.272,Aquarius:18.0.997,Hydra:6.0.619,FMLib:17.11.176.26 definitions=2023-11-30_25,2023-11-30_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 bulkscore=0 spamscore=0 mlxlogscore=566 malwarescore=0 suspectscore=0 adultscore=0 clxscore=1011 lowpriorityscore=0 mlxscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2312010006 There is currently a race condition occuring when accessing vblank_refcount. Therefore, vblank irq timeouts may occur. Avoid any vblank irq timeouts by stablizing the use of vblank_refcount. Paloma Arellano (2): drm/msm/dpu: Modify vblank_refcount if error in callback drm/msm/dpu: Add mutex lock in control vblank irq drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 6 ++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h | 6 ++++++ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 11 +++++++++-- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 11 +++++++++-- 4 files changed, 30 insertions(+), 4 deletions(-)