From patchwork Wed May 10 22:45:55 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 680955 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 C8530C7EE24 for ; Wed, 10 May 2023 22:46:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S235511AbjEJWqg (ORCPT ); Wed, 10 May 2023 18:46:36 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47858 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235579AbjEJWqe (ORCPT ); Wed, 10 May 2023 18:46:34 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BDCFB3A93 for ; Wed, 10 May 2023 15:46:32 -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 34AMQboi007985; Wed, 10 May 2023 22:46:28 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=weugBt5i3NtWDKQnZTSxEm7d9EAlHRCublVnTqj0WaU=; b=F/jseu57zsLyDS5WAJd8hsfCL6atIFFhj3BHsuLajk8tUNTVnM8rW72puEw5mlT2QQMS yiOstAPyz7NkTcJABOkEwywhq44s28R/07qSgjrx0SbpFBHSKZ1ZXfxRDHSHrY8UUKw4 dyr2eU1EfUjgnsK/Rq1Pjl61Iw3UG15u9bMytP6KCaKdHNNNvAYIDZ5KNIyydh8+DR1H UoLD7B2Aq5HQR4fZNxYMRQb5WjScPGs7IIwG8lmJuBSQRTUGC3E/uSWLmpU7ATwamA5b xjuoUDrdeXA5cQFPK8Bsz4Sb2kSAkZ5dJ7coTUBSDipfYyVy/SFfEzwsriVWQETJAdO3 lg== Received: from nasanppmta05.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qgett0n8k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 22:46:28 +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 34AMkQbr002522 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 22:46:26 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; Wed, 10 May 2023 15:46:26 -0700 From: Jessica Zhang Date: Wed, 10 May 2023 15:45:55 -0700 Subject: [PATCH v8 4/8] drm/msm: Add MSM-specific DSC helper methods MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v8-4-2c9b2bb1209c@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v8-0-2c9b2bb1209c@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v8-0-2c9b2bb1209c@quicinc.com> To: CC: Marijn Suijten , Konrad Dybcio , Kuogee Hsieh , "Daniel Vetter" , Rob Clark , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , , , Jessica Zhang X-Mailer: b4 0.13-dev-bfdf5 X-Developer-Signature: v=1; a=ed25519-sha256; t=1683758785; l=4228; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=qJVxitfbkHbdvMld2FiuuIDJNiOh2OKt8bd0OjQL9iQ=; b=I28c5Btu6VmTIaB5HNs2yXTSmCSPoJOGdf9GafNX3GeVeAPsz7kDDFSYen1Ir4hjUVrcHaKlC Wz5Jcau6BjTCwT5FOfuuJUSTfz4XJQVN/aHIO/EVGl/GQubzSvd3X+f 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-ORIG-GUID: kvxMvtX1q78exqN6151fdR3TfpXjobSQ X-Proofpoint-GUID: kvxMvtX1q78exqN6151fdR3TfpXjobSQ 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=2023-05-10_04,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=561 priorityscore=1501 bulkscore=0 impostorscore=0 mlxscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 phishscore=0 adultscore=0 suspectscore=0 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305100188 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Introduce MSM-specific DSC helper methods, as some calculations are common between DP and DSC. Reviewed-by: Dmitry Baryshkov Signed-off-by: Jessica Zhang --- drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/msm_dsc_helper.c | 26 ++++++++++++++ drivers/gpu/drm/msm/msm_dsc_helper.h | 69 ++++++++++++++++++++++++++++++++++++ 3 files changed, 96 insertions(+) diff --git a/drivers/gpu/drm/msm/Makefile b/drivers/gpu/drm/msm/Makefile index 7274c41228ed..b814fc80e2d5 100644 --- a/drivers/gpu/drm/msm/Makefile +++ b/drivers/gpu/drm/msm/Makefile @@ -94,6 +94,7 @@ msm-y += \ msm_atomic_tracepoints.o \ msm_debugfs.o \ msm_drv.o \ + msm_dsc_helper.o \ msm_fb.o \ msm_fence.o \ msm_gem.o \ diff --git a/drivers/gpu/drm/msm/msm_dsc_helper.c b/drivers/gpu/drm/msm/msm_dsc_helper.c new file mode 100644 index 000000000000..094decad9aea --- /dev/null +++ b/drivers/gpu/drm/msm/msm_dsc_helper.c @@ -0,0 +1,26 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved + */ + +#include +#include + +#include "msm_dsc_helper.h" + +s64 msm_dsc_get_bytes_per_slice(struct drm_dsc_config *dsc) +{ + return drm_fixp_from_fraction(dsc->slice_width * msm_dsc_get_bpp_int(dsc), 8); +} + +u32 msm_dsc_get_bytes_per_intf(struct drm_dsc_config *dsc, int intf_width) +{ + u32 bytes_per_slice; + s64 bytes_per_slice_fp; + int slice_per_intf = msm_dsc_get_slice_per_intf(dsc, intf_width); + + bytes_per_slice_fp = msm_dsc_get_bytes_per_slice(dsc); + bytes_per_slice = drm_fixp2int_ceil(bytes_per_slice_fp); + + return bytes_per_slice * slice_per_intf; +} diff --git a/drivers/gpu/drm/msm/msm_dsc_helper.h b/drivers/gpu/drm/msm/msm_dsc_helper.h new file mode 100644 index 000000000000..ed88905c15e5 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_dsc_helper.h @@ -0,0 +1,69 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved + */ + +#ifndef MSM_DSC_HELPER_H_ +#define MSM_DSC_HELPER_H_ + +#include +#include +#include + +/* + * Helper methods for MSM specific DSC calculations that are common between timing engine, + * DSI, and DP. + */ + +/** + * msm_dsc_get_bpp_int() - get bits per pixel integer value + * @dsc: Pointer to drm dsc config struct + * Returns: BPP integer value + */ +static inline int msm_dsc_get_bpp_int(struct drm_dsc_config *dsc) +{ + WARN_ON_ONCE(dsc->bits_per_pixel & 0xf); + return dsc->bits_per_pixel >> 4; +} + +/** + * msm_dsc_get_slice_per_intf() - get number of slices per interface + * @dsc: Pointer to drm dsc config struct + * @intf_width: interface width + * Returns: Integer representing the slice per interface + */ +static inline int msm_dsc_get_slice_per_intf(struct drm_dsc_config *dsc, int intf_width) +{ + return DIV_ROUND_UP(intf_width, dsc->slice_width); +} + +/** + * msm_dsc_get_bytes_per_line() - Calculate bytes per line + * @dsc: Pointer to drm dsc config struct + * Returns: Integer value representing pclk per interface + * + * Note: This value will then be passed along to DSI and DP for some more + * calculations. This is because DSI and DP divide the pclk_per_intf value + * by different values depending on if widebus is enabled. + */ +static inline int msm_dsc_get_bytes_per_line(struct drm_dsc_config *dsc) +{ + return dsc->slice_count * dsc->slice_width; +} + +/** + * msm_dsc_get_bytes_per_slice() - get size of each slice for dsc + * @dsc: Pointer to drm dsc config struct + * Returns: s31.32 fixed point value representing bytes per slice + */ +s64 msm_dsc_get_bytes_per_slice(struct drm_dsc_config *dsc); + +/** + * msm_dsc_get_bytes_per_intf() - get total bytes per interface + * @dsc: Pointer to drm dsc config struct + * @intf_width: interface width + * Returns: u32 value representing bytes per interface + */ +u32 msm_dsc_get_bytes_per_intf(struct drm_dsc_config *dsc, int intf_width); + +#endif /* MSM_DSC_HELPER_H_ */