From patchwork Wed May 17 22:27:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13245791 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 05C08C7EE2E for ; Wed, 17 May 2023 22:27:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229506AbjEQW1h (ORCPT ); Wed, 17 May 2023 18:27:37 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:32930 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229529AbjEQW1d (ORCPT ); Wed, 17 May 2023 18:27:33 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 73B9B5B84 for ; Wed, 17 May 2023 15:27:32 -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 34HM8PCA001899; Wed, 17 May 2023 22:27:26 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=a7B0ayGIh8OzYClD/n9CcobgsgRTzEzQ4uODoawXCl8=; b=liNeFnrGtGPi4eR+S35JQMQlmuWnqCl/lcbSBIol0d6xvWfbnj+orQRIvahihywirEny gpSwdRbncBSU0I8p7Ax8Z7shW8Si/vaQwDfFuNj0oTtJ3vTE0SEn24lsQlE7YTnz3Vv2 RagI0O1anwB8ECvoMpdwVN3CzwPLdfPojQpqGpZMWtOqa3OMmqbQtWE7hlupYQ8CwmiC Hs07L7rhuI8RIJWEpueK+dTEFoqZWaBxiyJyuSIM9V8vau93FaB4aXV7CPPH1aPxnkqw y5C1yDvruWDtFkL7v+LeTqIe+Tp9meyJuRilXA9RfPXYWAoGf8DgcS8S6RlRRfhk9m+b 2g== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qmcc63hb1-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 May 2023 22:27:25 +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 34HMRPPR029254 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 17 May 2023 22:27:25 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, 17 May 2023 15:27:24 -0700 From: Jessica Zhang Date: Wed, 17 May 2023 15:27:14 -0700 Subject: [PATCH v12 1/9] drm/display/dsc: Add flatness and initial scale value calculations MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v12-1-9cdb7401f614@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v12-0-9cdb7401f614@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v12-0-9cdb7401f614@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=1684362444; l=1178; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=HBLjkYM0NIQaOe9ib9DOZITFLYC9xanJfw8kq+YKhqk=; b=fXb9kf522h5cDSRYUcBiopEy8Z4H/kQW13oq1cvL1kHj3/6TjzQMYTGcRK918O9Wjl2JS6INN PteIZs3+b1WBbsu2gOYdoRZIpKdeP1gHQopfvjZaCZoP+HneoxVgu8s 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: XCAKxHZwd9mjTvDkg_YxQ20hfTTaLCdF X-Proofpoint-ORIG-GUID: XCAKxHZwd9mjTvDkg_YxQ20hfTTaLCdF X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.170.22 definitions=2023-05-17_04,2023-05-17_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 impostorscore=0 phishscore=0 suspectscore=0 mlxscore=0 bulkscore=0 adultscore=0 mlxlogscore=999 malwarescore=0 lowpriorityscore=0 clxscore=1015 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305170185 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. Reviewed-by: Marijn Suijten Signed-off-by: Jessica Zhang Reviewed-by: Dmitry Baryshkov --- 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 fc2104415dcb..753b0034eda7 100644 --- a/include/drm/display/drm_dsc_helper.h +++ b/include/drm/display/drm_dsc_helper.h @@ -25,5 +25,15 @@ void drm_dsc_set_rc_buf_thresh(struct drm_dsc_config *vdsc_cfg); int drm_dsc_setup_rc_params(struct drm_dsc_config *vdsc_cfg, enum drm_dsc_params_type type); int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg); +static inline u8 drm_dsc_initial_scale_value(const struct drm_dsc_config *dsc) +{ + return 8 * dsc->rc_model_size / (dsc->rc_model_size - dsc->initial_offset); +} + +static inline u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc) +{ + return 2 << (dsc->bits_per_component - 8); +} + #endif /* _DRM_DSC_HELPER_H_ */