From patchwork Mon Jun 12 23:37:36 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 691697 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 D87A0C7EE2F for ; Mon, 12 Jun 2023 23:38:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237654AbjFLXiV (ORCPT ); Mon, 12 Jun 2023 19:38:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39916 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237529AbjFLXiU (ORCPT ); Mon, 12 Jun 2023 19:38:20 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3A16B124; Mon, 12 Jun 2023 16:38:19 -0700 (PDT) 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 35CNL5Gh019976; Mon, 12 Jun 2023 23:38:11 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=quicinc.com; h=from : date : subject : mime-version : content-type : content-transfer-encoding : message-id : to : cc; s=qcppdkim1; bh=nF0oxcJueMu5x7aoa0z57cKbfobnIExcbE0zg1TNeHU=; b=SRnfHbLdzXaF1ChbEjrZDNiOKBjdN8M5MNpNFw87S/V8nQriV2G4fz3r9m/57CT4QID1 RSFSx31gE0q1SK6EtrYc9sOd3+zbzwcGmnre38wRiUSa9OtUK3jr1FGk108GBF+HQKAh B8nmva7Adi/CZzSkMaBpVSZIMm+Js4bXkSjki/aoEkQTfV7WgoEAUelMRiOyrzOfGSm6 cfS8qQV7pdr3TLPrCOBzmcn5eq8ZsEeQCRF7DgHOP1lJBrR/RQ3tR74OO06ukupTP/qs WM76bwzz4kAqANetqk+2mrFJWXN/uy4p1K0X16d16iTcAkX76ZbUuKKxKSd/smjlKyz9 Gw== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3r68x98cxf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Jun 2023 23:38:11 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 35CNcAUt031794 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Mon, 12 Jun 2023 23:38:10 GMT Received: from jesszhan-linux.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 15.2.986.42; Mon, 12 Jun 2023 16:38:10 -0700 From: Jessica Zhang Date: Mon, 12 Jun 2023 16:37:36 -0700 Subject: [PATCH] drm/msm/dsi: Enable BURST_MODE for command mode for DSI 6G v1.3+ MIME-Version: 1.0 Message-ID: <20230608-b4-add-burst-mode-v1-1-55dfbcfada55@quicinc.com> X-B4-Tracking: v=1; b=H4sIAD+sh2QC/x2NQQqDMBAAvyJ77kK0qbR9Qp/Q4mHXrBpoomS1C OLfjT0OzDAbqCQvCs9igyQ/r36MGcpLAe1AsRf0LjNUprqa2tyRLZJzyEvSGcPoBOnGXFpr6kd HkDsmFeREsR3O8vXGoAGjrDN+l0D96UxJOr/+v59m3w9wyGUGhwAAAA== To: Rob Clark , Dmitry Baryshkov , Sean Paul , Marijn Suijten , David Airlie , "Daniel Vetter" CC: , , , , , Jessica Zhang X-Mailer: b4 0.13-dev-c6835 X-Developer-Signature: v=1; a=ed25519-sha256; t=1686613090; l=1443; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=3AkGtxG8lwBTKyEdG06x39OyLfylf84f2+kPxqOtcqI=; b=JAHAesW/J4wfvV5wP9axVDLHOPlsZhpT/iM1ivhliyp3ouVWT1acQrqsqHF9UA5yAhESpwRW5 i3bDV9jxpxVAXra/1DeTxUvCCPr8YoRSPiq1CVyMyuXlF1DpDlNFsDs X-Developer-Key: i=quic_jesszhan@quicinc.com; a=ed25519; pk=gAUCgHZ6wTJOzQa3U0GfeCDH7iZLlqIEPo4rrjfDpWE= 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-GUID: E6FXTjbu_VmQieQhUcmIPFNqfwsx4Kwa X-Proofpoint-ORIG-GUID: E6FXTjbu_VmQieQhUcmIPFNqfwsx4Kwa X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-06-12_16,2023-06-12_02,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 lowpriorityscore=0 impostorscore=0 spamscore=0 suspectscore=0 mlxlogscore=662 mlxscore=0 adultscore=0 malwarescore=0 clxscore=1015 bulkscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2305260000 definitions=main-2306120204 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org During a frame transfer in command mode, there could be frequent LP11 <-> HS transitions when multiple DCS commands are sent mid-frame or if the DSI controller is running on slow clock and is throttled. To minimize frame latency due to these transitions, it is recommended to send the frame in a single burst. This feature is supported for DSI 6G 1.3 and above, thus enable burst mode if supported. Signed-off-by: Jessica Zhang --- drivers/gpu/drm/msm/dsi/dsi_host.c | 5 +++++ 1 file changed, 5 insertions(+) --- base-commit: dd969f852ba4c66938c71889e826aa8e5300d2f2 change-id: 20230608-b4-add-burst-mode-a5bb144069fa Best regards, diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 744f2398a6d6..8254b06dca85 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -994,6 +994,11 @@ static void dsi_timing_setup(struct msm_dsi_host *msm_host, bool is_bonded_dsi) dsi_write(msm_host, REG_DSI_CMD_MDP_STREAM0_TOTAL, DSI_CMD_MDP_STREAM0_TOTAL_H_TOTAL(hdisplay) | DSI_CMD_MDP_STREAM0_TOTAL_V_TOTAL(mode->vdisplay)); + + if (msm_host->cfg_hnd->major == MSM_DSI_VER_MAJOR_6G && + msm_host->cfg_hnd->minor >= MSM_DSI_6G_VER_MINOR_V1_3) + dsi_write(msm_host, REG_DSI_CMD_MODE_MDP_CTRL2, + DSI_CMD_MODE_MDP_CTRL2_BURST_MODE); } }