From patchwork Fri Mar 31 18:49:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13196508 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 8CE1EC77B6C for ; Fri, 31 Mar 2023 18:49:53 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233178AbjCaStw (ORCPT ); Fri, 31 Mar 2023 14:49:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55670 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233147AbjCaStv (ORCPT ); Fri, 31 Mar 2023 14:49:51 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DB0D520DB5 for ; Fri, 31 Mar 2023 11:49:49 -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 32V7U7G4032539; Fri, 31 Mar 2023 18:49:42 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=o1xDfida6T+2ZM6m3nQvQUu+mrA1Fj+ufjyOcqDHCUs=; b=fDK68pt0xDWBf+StLHeSWzmEA0YbkBlCfKVIJOin7QTwR3HjqKx1UO775+j9mpBrRfO7 6eXuB2/p0C4k5CsONmsLpOUD27Uv1MdB5/6HhtutIVfy38rKLNY104I96WLEVSx7i8y8 tCctqJEoSW9B2pNiPSD+A+2zl6GGOHkcQGMLNeLawYkhTepDHFUXTMUtBX68jN2DK3hc 4bsky8CFEcdn5ivKKS8nQO5J+BDI7lrcNjTtHQMYtFw2/TwHbeOc9BQXJEXamwAKHHit krutVdpRxstzXgXVlY+U94uhFtzgxjb58WFRdWATHEJ4iOYEBg/YKnHmxaJevTPIEjuz nA== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3pnu6ct7yr-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 NASANPPMTA04.qualcomm.com (8.17.1.5/8.17.1.5) with ESMTPS id 32VInfe2010562 (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 11:49:16 -0700 Subject: [PATCH RFC v2 1/6] drm/display/dsc: Add flatness and initial scale value calculations MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v2-1-3c13ced536b2@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=1274; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=w4nDYO0S6ZoPV/BNuO9yZna3laIwVxPvO7cZcT4D5X4=; b=+mExcUJ6xmrh587LDvt6mql5j489gsdODRi+1MpwwVbunInCT00N8QUyld/qwrIlo0nXZzi7d mEw3QXxGHp8AwyXPppKpHWjn5huEp3J+NL8tsgT4ZWuYyeVZ2JN6TxV 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: xQK0GqfEmMRkO66ghW8iX-hDCyIIOUkh X-Proofpoint-ORIG-GUID: xQK0GqfEmMRkO66ghW8iX-hDCyIIOUkh 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 malwarescore=0 adultscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 suspectscore=0 clxscore=1015 priorityscore=1501 mlxlogscore=999 phishscore=0 bulkscore=0 impostorscore=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 Add helpers to calculate det_thresh_flatness and initial_scale_value as these calculations are defined within the DSC spec. Changes in v2: - Renamed det_thresh_flatness to flatness_det_thresh - Set initial_scale_value directly in helper Signed-off-by: Jessica Zhang Reviewed-by: Dmitry Baryshkov --- include/drm/display/drm_dsc_helper.h | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h index 4448c482b092..f6bc268c1719 100644 --- a/include/drm/display/drm_dsc_helper.h +++ b/include/drm/display/drm_dsc_helper.h @@ -17,6 +17,17 @@ enum drm_dsc_params_kind { DRM_DSC_1_2_420, }; +static inline void drm_dsc_set_initial_scale_value(struct drm_dsc_config *dsc) +{ + dsc->initial_scale_value = 8 * dsc->rc_model_size / + (dsc->rc_model_size - dsc->initial_offset); +} + +static inline int drm_dsc_calculate_flatness_det_thresh(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,