From patchwork Wed Mar 29 23:18:46 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 668176 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 97E98C761A6 for ; Wed, 29 Mar 2023 23:19:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230139AbjC2XTh (ORCPT ); Wed, 29 Mar 2023 19:19:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56090 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230419AbjC2XTc (ORCPT ); Wed, 29 Mar 2023 19:19:32 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 66D5A55A8 for ; Wed, 29 Mar 2023 16:19:31 -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 32TL1aRR029711; Wed, 29 Mar 2023 23:19:25 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=EPS8WVCNA4Hq2My0AKL1dW1ePYQOxGns1QFO2kAGooU=; b=mYAvBSHBQI/ZP5DgjQ0GNEmKKSsHFAdesLUGxG7P1zfOWKTmLUJQt4orVjofsuoWbd2J DIFx/sDLd8b1jsseVvr8nRrAVoRyUl+gLzRZWp4Y8zAgnl19YOxJAZFxqeSP5jG8lnmn z3VP9+tRBE+Crohkk1+BNKQwKve2ietJgdGMpliIU/vK2LWgWNEJ7LFZppWT+o02JsuS 8H0+sIjaBv75U7kBxvWDc+uW1UYx4anJ0Ko9trLCHTjcwMwGBFoB5ttO/IWg+vEFNMVI 6a21IpFLExaeIlGZnJpsg/0JEzLRz9WX58rSmduTiqZnrIUgOo3PAz/BsoTA+TdAwDI8 Rg== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3pmgpm2c5n-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Mar 2023 23:19:25 +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 32TNJOhl001691 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 29 Mar 2023 23:19:24 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, 29 Mar 2023 16:19:23 -0700 From: Jessica Zhang Date: Wed, 29 Mar 2023 16:18:46 -0700 Subject: [PATCH RFC 1/5] drm/display/dsc: Add flatness and initial scale value calculations MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v1-1-f3e479f59b6d@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v1-0-f3e479f59b6d@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v1-0-f3e479f59b6d@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=1680131963; l=1136; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=SmUlHFX48mj90cfuauXTJhBCrZPlPdKdTIQ5CrqNEnM=; b=WVhQT4/v4oGBVZjjdTmUcWoniU+tN/8nznzTS5hRi2BElh6elqLXQgBwDZtter1pC8VUedQug ZlAf2nIpdfOAIdNL0FIICf7L7TNoUNHudP5+hkUDhwuX3HRX6PLgByr 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: b6e1NcaQONXW9piBgZBal-W0jf1XVnJS X-Proofpoint-ORIG-GUID: b6e1NcaQONXW9piBgZBal-W0jf1XVnJS 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=2023-03-29_14,2023-03-28_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 mlxlogscore=999 phishscore=0 adultscore=0 clxscore=1015 malwarescore=0 spamscore=0 lowpriorityscore=0 bulkscore=0 suspectscore=0 priorityscore=1501 mlxscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2303200000 definitions=main-2303290174 Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org Add helpers to calculate det_thresh_flatness and initial_scale_value as these calculations are defined within the DSC spec. Signed-off-by: Jessica Zhang --- include/drm/display/drm_dsc_helper.h | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h index 4448c482b092..63175650a45e 100644 --- a/include/drm/display/drm_dsc_helper.h +++ b/include/drm/display/drm_dsc_helper.h @@ -17,6 +17,16 @@ enum drm_dsc_params_kind { DRM_DSC_1_2_420, }; +static inline int drm_dsc_calculate_initial_scale_value(struct drm_dsc_config *dsc) +{ + return 8 * dsc->rc_model_size / (dsc->rc_model_size - dsc->initial_offset); +} + +static inline int drm_dsc_calculate_det_thresh_flatness(struct drm_dsc_config *dsc) +{ + return 2 << (dsc->bits_per_component - 8); +} + void drm_dsc_dp_pps_header_init(struct dp_sdp_header *pps_header); int drm_dsc_dp_rc_buffer_size(u8 rc_buffer_block_size, u8 rc_buffer_size); void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp,