From patchwork Fri Mar 31 18:49:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13196510 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 06873C77B6E for ; Fri, 31 Mar 2023 18:49:56 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233147AbjCaStz (ORCPT ); Fri, 31 Mar 2023 14:49:55 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55694 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233172AbjCaStw (ORCPT ); Fri, 31 Mar 2023 14:49:52 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CAF4320DB1 for ; Fri, 31 Mar 2023 11:49:49 -0700 (PDT) Received: from pps.filterd (m0279872.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 32VEMHkq019613; Fri, 31 Mar 2023 18:49:43 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=/EsyZ1e7/PWP+HeLMFXD1pWwmNHbmV3kVone6pN5zRU=; b=RYSF1jJbf488yNtKQuCMtQYq5qEyjh7jKsTh4HJQeQ9GDdGpW6B3o8Bd7pQonn0UVriJ j9wkDN2rUwcl+z/Du1H9m+Kl1q2w7iYoFCBSaBR5zNs6WUuBMsbSH033y0XwphmHjmR7 Y+UWa8WOuKXPrhKx5FMmNmkGc+vi/sn8Rxk48NyC/Rg+ZAKF8mr34fAqgnGDvB+WxeKP itLfNV3KOKmnGmHil4YSzcik1rvCIlNSQpZTHJpuVIVD/3uoubdr5+UBX0w1iCQ949Xa 494AAYjjPjNC20l6rLnh2HDMtZhuivWIM4ZsTqY+SXPuVvNivwm8K29/T/LyXOGoqGdS Ew== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3pp178gww9-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 Mar 2023 18:49:42 +0000 Received: from nasanex01b.na.qualcomm.com (nasanex01b.na.qualcomm.com [10.46.141.250]) by NASANPPMTA01.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 32VInfbc029984 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Fri, 31 Mar 2023 18:49:41 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; Fri, 31 Mar 2023 11:49:41 -0700 From: Jessica Zhang Date: Fri, 31 Mar 2023 11:49:17 -0700 Subject: [PATCH RFC v2 2/6] drm/msm: Add MSM-specific DSC helper methods MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v2-2-3c13ced536b2@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v2-0-3c13ced536b2@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v2-0-3c13ced536b2@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=1680288580; l=4962; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=u/YixmQK3cVCkpt4fFiytcJvq3Fb87XL/+9SAtOjvaA=; b=jtKzpkzgo8DcvEIaAIp8TDb8MnEu5lnugolVtAkQovuL0kD1V5gGuAggj6kF5ReNM5/NfWMuZ 6oz9P1MCmrLBXePWdZsjO7tQvCgZKtKJ/uSA9+1X5ijVoMUZ3m3ji+0 X-Developer-Key: i=quic_jesszhan@quicinc.com; a=ed25519; pk=gAUCgHZ6wTJOzQa3U0GfeCDH7iZLlqIEPo4rrjfDpWE= X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01b.na.qualcomm.com (10.46.141.250) 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: fTrA3zMxilo4yLJuhCFGXV3dFt127ncN X-Proofpoint-ORIG-GUID: fTrA3zMxilo4yLJuhCFGXV3dFt127ncN 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=2023-03-31_07,2023-03-31_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 mlxlogscore=559 impostorscore=0 adultscore=0 mlxscore=0 spamscore=0 bulkscore=0 malwarescore=0 lowpriorityscore=0 priorityscore=1501 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2303310151 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. Changes in v2: - Moved files up to msm/ directory - Dropped get_comp_ratio() helper - Used drm_int2fixp() to convert to integers to fp - Style changes to improve readability - Dropped unused bpp variable in msm_dsc_get_dce_bytes_per_line() - Changed msm_dsc_get_slice_per_intf() to a static inline method - Dropped last division step of msm_dsc_get_pclk_per_line() and changed method name accordingly - Changed DSC_BPP macro to drm_dsc_get_bpp_int() helper method - Fixed some math issues caused by passing in incorrect types to drm_fixed methods in get_bytes_per_soft_slice() Signed-off-by: Jessica Zhang --- drivers/gpu/drm/msm/Makefile | 1 + drivers/gpu/drm/msm/msm_dsc_helper.c | 53 ++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/msm/msm_dsc_helper.h | 42 ++++++++++++++++++++++++++++ 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..60b73e17e6eb --- /dev/null +++ b/drivers/gpu/drm/msm/msm_dsc_helper.c @@ -0,0 +1,53 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2023 Qualcomm Innovation Center, Inc. All rights reserved + */ + +#include +#include +#include + +#include "msm_drv.h" +#include "msm_dsc_helper.h" + +static s64 get_bytes_per_soft_slice(struct drm_dsc_config *dsc, int intf_width, u32 src_bpp) +{ + int bpp = msm_dsc_get_bpp_int(dsc); + s64 numerator_fp, denominator_fp; + s64 comp_ratio_fp = drm_fixp_from_fraction(src_bpp, bpp); + + numerator_fp = drm_int2fixp(dsc->slice_width * 3); + denominator_fp = drm_fixp_from_fraction(comp_ratio_fp * 8, drm_int2fixp(bpp)); + + return drm_fixp_div(numerator_fp, denominator_fp); +} + +u32 msm_dsc_get_eol_byte_num(struct drm_dsc_config *dsc, int intf_width, u32 src_bpp) +{ + u32 bytes_per_soft_slice, extra_eol_bytes, bytes_per_intf; + s64 bytes_per_soft_slice_fp; + int slice_per_intf = msm_dsc_get_slice_per_intf(dsc, intf_width); + + bytes_per_soft_slice_fp = get_bytes_per_soft_slice(dsc, intf_width, src_bpp); + bytes_per_soft_slice = drm_fixp2int_ceil(bytes_per_soft_slice_fp); + + bytes_per_intf = bytes_per_soft_slice * slice_per_intf; + extra_eol_bytes = bytes_per_intf % 3; + if (extra_eol_bytes != 0) + extra_eol_bytes = 3 - extra_eol_bytes; + + return extra_eol_bytes; +} + +int msm_dsc_get_uncompressed_pclk_per_line(struct drm_dsc_config *dsc, int intf_width, u32 src_bpp) +{ + s64 data_width; + + if (!dsc->slice_width || (intf_width < dsc->slice_width)) + return -EINVAL; + + data_width = drm_fixp_mul(dsc->slice_count, + get_bytes_per_soft_slice(dsc, intf_width, src_bpp)); + + return drm_fixp2int_ceil(data_width); +} 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..743cd324b7d9 --- /dev/null +++ b/drivers/gpu/drm/msm/msm_dsc_helper.h @@ -0,0 +1,42 @@ +/* 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 + +/* + * Helper methods for MSM specific DSC calculations that are common between timing engine, + * DSI, and DP. + */ + +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; +} + +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); +} + +static inline u32 msm_dsc_get_dce_bytes_per_line(struct drm_dsc_config *dsc, int intf_width) +{ + return DIV_ROUND_UP(msm_dsc_get_bpp_int(dsc) * intf_width, 8); +} + +u32 msm_dsc_get_eol_byte_num(struct drm_dsc_config *dsc, int intf_width, u32 src_bpp); +u32 msm_dsc_get_dce_bytes_per_line(struct drm_dsc_config *dsc, int intf_width); + +/* Calculate uncompressed pclk per line. This value will then be passed along to + * DSI and DP to calculate pclk_per_line. This is because DSI and DP divide the + * uncompressed pclk_per_line by different values depending on if widebus is enabled. + */ +int msm_dsc_get_uncompressed_pclk_per_line(struct drm_dsc_config *dsc, + int intf_width, u32 src_bpp); +#endif /* MSM_DSC_HELPER_H_ */