From patchwork Fri Dec 1 01:29:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Paloma Arellano X-Patchwork-Id: 13475263 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=quicinc.com header.i=@quicinc.com header.b="QuPkiN4j" Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D8EE610E2 for ; Thu, 30 Nov 2023 17:29:53 -0800 (PST) Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3AUNV9fv028109; Fri, 1 Dec 2023 01:29:46 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding : content-type; s=qcppdkim1; bh=/doiT3V7EnDbYp65hdvkOodBIZqevS9ubb/sQJJgVWg=; b=QuPkiN4jziCm7rn+TFZ0pP1oVAbSNP1HsN9EBgYfPjrj0QbGkuKZGbB+G3thlLikmRkO YqGr171jKrGfQy+d+BvP4OWXS6HoO+49otf4M8kOsqqK24GckVF+Lpbo2JuflXtV8298 6U/uapMsAjW2CtZxb0roBbNpQYwuTKFffbnaMK52EWHBNYjnfnE9QKGfdTeEjlgFGzvF hmvXPitxV7Krmcpr4qEOeRFIg0DWo5jPEVovRyRkjpVnZ5mla9dAXbpgoQdD9W9sQNOe 4nVI5vrugTZOqbvYEp/SBJAZ2dkmq6oSjixvfQwPcpjCWQ7N9voDh3bKZFY5QiPQwmrQ Uw== Received: from nalasppmta02.qualcomm.com (Global_NAT1.qualcomm.com [129.46.96.20]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3upw12se23-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 01 Dec 2023 01:29:46 +0000 Received: from nalasex01a.na.qualcomm.com (nalasex01a.na.qualcomm.com [10.47.209.196]) by NALASPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3B11Tj9u007597 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 1 Dec 2023 01:29:45 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 17:29:44 -0800 From: Paloma Arellano To: CC: Paloma Arellano , , , , , , , , , , Subject: [PATCH v2 2/2] drm/msm/dpu: Add mutex lock in control vblank irq Date: Thu, 30 Nov 2023 17:29:19 -0800 Message-ID: <20231201012923.12571-3-quic_parellan@quicinc.com> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20231201012923.12571-1-quic_parellan@quicinc.com> References: <20231201012923.12571-1-quic_parellan@quicinc.com> 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: buuqdiLKNZjVFIx4B2I2znoxExwYCNLK X-Proofpoint-ORIG-GUID: buuqdiLKNZjVFIx4B2I2znoxExwYCNLK 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 mlxscore=0 bulkscore=0 malwarescore=0 suspectscore=0 mlxlogscore=740 phishscore=0 priorityscore=1501 spamscore=0 impostorscore=0 adultscore=0 lowpriorityscore=0 clxscore=1015 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2311060000 definitions=main-2312010008 To add a missing mutex lock to control vblank irq. To prevent race conditions when registering/unregistering the irq callback. Signed-off-by: Paloma Arellano --- 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 | 2 ++ drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 2 ++ 4 files changed, 16 insertions(+) diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c index 1cf7ff6caff4e..19ff7d1d5ccad 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c @@ -119,6 +119,8 @@ enum dpu_enc_rc_states { * Virtual encoder defers as much as possible to the physical encoders. * Virtual encoder registers itself with the DRM Framework as the encoder. * @base: drm_encoder base class for registration with DRM + * @vblank_ctl_lock: Vblank ctl mutex lock to protect physical encoder + * for IRQ purposes * @enc_spinlock: Virtual-Encoder-Wide Spin Lock for IRQ purposes * @enabled: True if the encoder is active, protected by enc_lock * @num_phys_encs: Actual number of physical encoders contained. @@ -166,6 +168,7 @@ enum dpu_enc_rc_states { */ struct dpu_encoder_virt { struct drm_encoder base; + struct mutex vblank_ctl_lock; spinlock_t enc_spinlock; bool enabled; @@ -2255,6 +2258,7 @@ static int dpu_encoder_setup_display(struct dpu_encoder_virt *dpu_enc, phys_params.dpu_kms = dpu_kms; phys_params.parent = &dpu_enc->base; phys_params.enc_spinlock = &dpu_enc->enc_spinlock; + phys_params.vblank_ctl_lock = &dpu_enc->vblank_ctl_lock; WARN_ON(disp_info->num_of_h_tiles < 1); @@ -2386,6 +2390,7 @@ struct drm_encoder *dpu_encoder_init(struct drm_device *dev, dpu_enc->enabled = false; mutex_init(&dpu_enc->enc_lock); mutex_init(&dpu_enc->rc_lock); + mutex_init(&dpu_enc->vblank_ctl_lock); ret = dpu_encoder_setup_display(dpu_enc, dpu_kms, disp_info); if (ret) @@ -2495,6 +2500,7 @@ void dpu_encoder_phys_init(struct dpu_encoder_phys *phys_enc, phys_enc->dpu_kms = p->dpu_kms; phys_enc->split_role = p->split_role; phys_enc->enc_spinlock = p->enc_spinlock; + phys_enc->vblank_ctl_lock = p->vblank_ctl_lock; phys_enc->enable_state = DPU_ENC_DISABLED; atomic_set(&phys_enc->vblank_refcount, 0); diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h index 6f04c3d56e77c..5691bf6b82ee6 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys.h @@ -155,6 +155,8 @@ enum dpu_intr_idx { * @hw_wb: Hardware interface to the wb registers * @dpu_kms: Pointer to the dpu_kms top level * @cached_mode: DRM mode cached at mode_set time, acted on in enable + * @vblank_ctl_lock: Vblank ctl mutex lock to protect physical encoder + * for IRQ purposes * @enabled: Whether the encoder has enabled and running a mode * @split_role: Role to play in a split-panel configuration * @intf_mode: Interface mode @@ -183,6 +185,7 @@ struct dpu_encoder_phys { struct dpu_hw_wb *hw_wb; struct dpu_kms *dpu_kms; struct drm_display_mode cached_mode; + struct mutex *vblank_ctl_lock; enum dpu_enc_split_role split_role; enum dpu_intf_mode intf_mode; spinlock_t *enc_spinlock; @@ -253,6 +256,8 @@ struct dpu_encoder_phys_cmd { * @split_role: Role to play in a split-panel configuration * @hw_intf: Hardware interface to the intf registers * @hw_wb: Hardware interface to the wb registers + * @vblank_ctl_lock: Vblank ctl mutex lock to protect physical encoder + * for IRQ purposes * @enc_spinlock: Virtual-Encoder-Wide Spin Lock for IRQ purposes */ struct dpu_enc_phys_init_params { @@ -261,6 +266,7 @@ struct dpu_enc_phys_init_params { enum dpu_enc_split_role split_role; struct dpu_hw_intf *hw_intf; struct dpu_hw_wb *hw_wb; + struct mutex *vblank_ctl_lock; spinlock_t *enc_spinlock; }; diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c index 25babfe1f001a..dcf1f6a18ad6e 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c @@ -244,6 +244,7 @@ static int dpu_encoder_phys_cmd_control_vblank_irq( return -EINVAL; } + mutex_lock(phys_enc->vblank_ctl_lock); refcount = atomic_read(&phys_enc->vblank_refcount); /* Slave encoders don't report vblank */ @@ -275,6 +276,7 @@ static int dpu_encoder_phys_cmd_control_vblank_irq( } end: + mutex_unlock(phys_enc->vblank_ctl_lock); if (ret) { DRM_ERROR("vblank irq err id:%u pp:%d ret:%d, enable %s/%d\n", DRMID(phys_enc->parent), diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c index 8e905d7267f9f..87bb49763785d 100644 --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c @@ -364,6 +364,7 @@ static int dpu_encoder_phys_vid_control_vblank_irq( int ret = 0; int refcount; + mutex_lock(phys_enc->vblank_ctl_lock); refcount = atomic_read(&phys_enc->vblank_refcount); /* Slave encoders don't report vblank */ @@ -394,6 +395,7 @@ static int dpu_encoder_phys_vid_control_vblank_irq( } end: + mutex_unlock(phys_enc->vblank_ctl_lock); if (ret) { DRM_ERROR("failed: id:%u intf:%d ret:%d enable:%d refcnt:%d\n", DRMID(phys_enc->parent),