From patchwork Wed Apr 5 00:41:29 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13201082 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 2A5A7C761AF for ; Wed, 5 Apr 2023 00:42:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236667AbjDEAmi (ORCPT ); Tue, 4 Apr 2023 20:42:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:54066 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236688AbjDEAmf (ORCPT ); Tue, 4 Apr 2023 20:42:35 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 03AC81705 for ; Tue, 4 Apr 2023 17:42:33 -0700 (PDT) Received: from pps.filterd (m0279870.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 3350MMfM000431; Wed, 5 Apr 2023 00:42:29 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 : references : in-reply-to : to : cc; s=qcppdkim1; bh=i7ay0NpscQ5tUXKrgtfN37c9JMToX6jDCkt1j96wJlM=; b=dN3d5bmFTl9SgiYlshKGLScRSyqrAylvDMX5s5+uAzVtWZ8U/aP38mQbretlvnpmSqd4 KjNQaz6bhJiVddSlineqfbpjWhDfbqEl0hj0oInRn1tLWR2h5pnqCyXojg8aGTjbJ9Qe nbxYbnR73VTxA0edzHvRUOv6ylkNEgAZ+Vzs9B6lsFH8cejRoXmVb3msNbh6wkCBNryG Ww1EQwwBLtoQ4FAEoHLy7fzz2ytuDzNVfCK4xstAITFQKLdrJh+EiGjR+EvSYWMDbKWU LxRkSGSCURlOrjo2OYqXCkNURKgDTzBPzT7XaP54WQ0RtTov51bdTXu2AVigMSmlHlXc eQ== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3prn8b1jvy-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 05 Apr 2023 00:42:29 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA05.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 3350gSlH013290 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 5 Apr 2023 00:42:28 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; Tue, 4 Apr 2023 17:42:28 -0700 From: Jessica Zhang Date: Tue, 4 Apr 2023 17:41:29 -0700 Subject: [PATCH v4 6/6] drm/msm/dsi: Fix calculations pkt_per_line MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v4-6-1b79c78b30d7@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v4-0-1b79c78b30d7@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v4-0-1b79c78b30d7@quicinc.com> To: CC: Marijn Suijten , Konrad Dybcio , Daniel Vetter , Rob Clark , Abhinav Kumar , "Dmitry Baryshkov" , Sean Paul , , , "Jessica Zhang" X-Mailer: b4 0.13-dev-00303 X-Developer-Signature: v=1; a=ed25519-sha256; t=1680655346; l=1392; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=epOztMquNcJjfSdTdLWdp4KesaKwtwKqdN08Dl1tTJA=; b=hVZf/CQizABp/armaWTMGhzAVSGtCzffadrrbL0XCuf0pTCpWQsBPMk5Gf4wfcIlDvkrmsQyM 2fvBAdZZI1CCkD550Ngj3sj+/e9nVaHGg/lYMLuyI3kY0k4W9TUz+Ix 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: IOolq9KEVBskziHA_pykZU1xHj63ZNTH X-Proofpoint-ORIG-GUID: IOolq9KEVBskziHA_pykZU1xHj63ZNTH X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.942,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-04-04_14,2023-04-04_05,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 priorityscore=1501 adultscore=0 phishscore=0 spamscore=0 bulkscore=0 mlxlogscore=940 impostorscore=0 malwarescore=0 lowpriorityscore=0 mlxscore=0 suspectscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2304050003 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Currently, pkt_per_line is calculated by dividing slice_per_intf by slice_count. This is incorrect, as slice_per_intf should be divided by slice_per_pkt, which is not always equivalent to slice_count as it is possible for there to be multiple soft slices per interface even though a panel only specifies one slice per packet. Fixes: 08802f515c3c ("drm/msm/dsi: Add support for DSC configuration") Signed-off-by: Jessica Zhang Reviewed-by: Dmitry Baryshkov Reviewed-by: Dmitry Baryshkov --- drivers/gpu/drm/msm/dsi/dsi_host.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index 412339cc9301..633b60acfe18 100644 --- a/drivers/gpu/drm/msm/dsi/dsi_host.c +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c @@ -862,7 +862,11 @@ static void dsi_update_dsc_timing(struct msm_dsi_host *msm_host, bool is_cmd_mod total_bytes_per_intf = msm_dsc_get_bytes_per_intf(dsc, hdisplay); eol_byte_num = total_bytes_per_intf % 3; - pkt_per_line = slice_per_intf / dsc->slice_count; + + /* Default to 1 slice_per_pkt, so pkt_per_line will be equal to + * slice per intf. + */ + pkt_per_line = slice_per_intf; if (is_cmd_mode) /* packet data type */ reg = DSI_COMMAND_COMPRESSION_MODE_CTRL_STREAM0_DATATYPE(MIPI_DSI_DCS_LONG_WRITE);