From patchwork Mon Feb 13 19:48:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13138907 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 02752C6379F for ; Mon, 13 Feb 2023 19:48:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231392AbjBMTsv (ORCPT ); Mon, 13 Feb 2023 14:48:51 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51288 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231450AbjBMTso (ORCPT ); Mon, 13 Feb 2023 14:48:44 -0500 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 7FC011714A for ; Mon, 13 Feb 2023 11:48:42 -0800 (PST) Received: from pps.filterd (m0279868.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31DBFJLD015847; Mon, 13 Feb 2023 19:48:37 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=muB26ypjc3/yN4oF4eVtJN9QtMTWpQIqYJA6l8XUoII=; b=PmsGe7oUQGxIuQKNl/mK0O1veET3hVa697c2HTj9ZTdMcVixhGRfmtZ+107nMLIPolUd GzNjHIzui4pbqEFlbpXetLK6T7FypHSdk2Rx7aUnHt1oF9Kpdc36NBeFWqwmDsQ0LH1o Odbe80iDB6ERxUsEkauLkmCshZfWcm+vmM+MOVM7d9hshRn1ktm+3q2FRXLGdfuC1XDv ZpK+AcSNR0HNz4hO50pt3Kcd7g9uUO6AsbSVkCqF2MXzx/VJtJmdrQIGP+PWNWNAeMZB bWQqfvas78QoAkfqUs2tEXbdq6Pb6u4iAzurLGvElpLDsGFacRQT1AtROYHG6zy0Bn7u Nw== Received: from nasanppmta02.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3npmvrkrqw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Feb 2023 19:48:37 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA02.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 31DJmaZR022262 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 13 Feb 2023 19:48:36 GMT Received: from JESSZHAN.qualcomm.com (10.80.80.8) by nasanex01b.na.qualcomm.com (10.46.141.250) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.36; Mon, 13 Feb 2023 11:48:35 -0800 From: Jessica Zhang To: CC: Jessica Zhang , , , , , , , , Subject: [RFC PATCH v3 1/4] drm/msm/dpu: Move TE setup to prepare_for_kickoff() Date: Mon, 13 Feb 2023 11:48:16 -0800 Message-ID: <20230213194819.608-2-quic_jesszhan@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230213194819.608-1-quic_jesszhan@quicinc.com> References: <20230213194819.608-1-quic_jesszhan@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nasanex01b.na.qualcomm.com (10.46.141.250) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-ORIG-GUID: iocDkUwssXHt9Bfgi7Y1Xeo89nClPIAR X-Proofpoint-GUID: iocDkUwssXHt9Bfgi7Y1Xeo89nClPIAR X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-13_12,2023-02-13_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 phishscore=0 mlxscore=0 impostorscore=0 mlxlogscore=999 suspectscore=0 adultscore=0 malwarescore=0 spamscore=0 clxscore=1015 bulkscore=0 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302130173 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently, DPU will enable TE during prepare_commit(). However, this will cause issues when trying to read/write to register in get_autorefresh_config(), because the core clock rates aren't set at that time. This used to work because phys_enc->hw_pp is only initialized in mode set [1], so the first prepare_commit() will return before any register read/write as hw_pp would be NULL. However, when we try to implement support for INTF TE, we will run into the clock issue described above as hw_intf will *not* be NULL on the first prepare_commit(). This is because the initialization of dpu_enc->hw_intf has been moved to dpu_encoder_setup() [2]. To avoid this issue, let's enable TE during prepare_for_kickoff() instead as the core clock rates are guaranteed to be set then. Depends on: "Implement tearcheck support on INTF block" [3] Changes in V3: - Added function prototypes - Reordered function definitions to make change more legible - Removed prepare_commit() function from dpu_encoder_phys_cmd [1] https://gitlab.freedesktop.org/drm/msm/-/blob/msm-next/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c#L1109 [2] https://gitlab.freedesktop.org/drm/msm/-/blob/msm-next/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c#L2339 [3] https://patchwork.freedesktop.org/series/112332/ Signed-off-by: Jessica Zhang --- drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 10 +++++++--- 1 file changed, 7 insertions(+), 3 deletions(-) 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 cb05036f2916..c6feffafa13f 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 @@ -40,6 +40,10 @@ #define DPU_ENC_MAX_POLL_TIMEOUT_US 2000 +static bool dpu_encoder_phys_cmd_is_ongoing_pptx( + struct dpu_encoder_phys *phys_enc); +static void dpu_encoder_phys_cmd_enable_te(struct dpu_encoder_phys *phys_enc); + static bool dpu_encoder_phys_cmd_is_master(struct dpu_encoder_phys *phys_enc) { return (phys_enc->split_role != ENC_ROLE_SLAVE); @@ -611,6 +615,8 @@ static void dpu_encoder_phys_cmd_prepare_for_kickoff( phys_enc->hw_pp->idx - PINGPONG_0); } + dpu_encoder_phys_cmd_enable_te(phys_enc); + DPU_DEBUG_CMDENC(cmd_enc, "pp:%d pending_cnt %d\n", phys_enc->hw_pp->idx - PINGPONG_0, atomic_read(&phys_enc->pending_kickoff_cnt)); @@ -641,8 +647,7 @@ static bool dpu_encoder_phys_cmd_is_ongoing_pptx( return false; } -static void dpu_encoder_phys_cmd_prepare_commit( - struct dpu_encoder_phys *phys_enc) +static void dpu_encoder_phys_cmd_enable_te(struct dpu_encoder_phys *phys_enc) { struct dpu_encoder_phys_cmd *cmd_enc = to_dpu_encoder_phys_cmd(phys_enc); @@ -799,7 +804,6 @@ static void dpu_encoder_phys_cmd_trigger_start( static void dpu_encoder_phys_cmd_init_ops( struct dpu_encoder_phys_ops *ops) { - ops->prepare_commit = dpu_encoder_phys_cmd_prepare_commit; ops->is_master = dpu_encoder_phys_cmd_is_master; ops->atomic_mode_set = dpu_encoder_phys_cmd_atomic_mode_set; ops->enable = dpu_encoder_phys_cmd_enable;