From patchwork Wed May 10 22:45:52 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13237321 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 B7560C7EE22 for ; Wed, 10 May 2023 22:46:36 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236461AbjEJWqf (ORCPT ); Wed, 10 May 2023 18:46:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:47850 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235511AbjEJWqd (ORCPT ); Wed, 10 May 2023 18:46:33 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id A50993AA4 for ; Wed, 10 May 2023 15:46:32 -0700 (PDT) Received: from pps.filterd (m0279869.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 34AMQTBZ005308; Wed, 10 May 2023 22:46:27 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=02WDuKrryAsnhGgxZTNSN0H2+AQg1hejxGqvJ0WHbsY=; b=fxWg0AZ0Vmd7Zx0LF6Z1yDEW0vVonvuWJwnxcJlpPTUEhBfbyBi7Yu686y9AcShjXiId Hc4pkJPmB9waCLMiasHIZI4bJd5OWV/0Fyf2So95bdeJGT47DIKDiS5SltXSv91Qo3vh s/8VRBncAZ9wboOWrxJOos5whpElg02W0tCIgHzP7JvlUJS9VGVXXS3YDkwP+XZMn+Az yg+5sBW+a1qlOjvTojfDOQMVttWngX6xs7hMgPEi+UYdb1IOG09/G92aYB/ZoKlkkzuK G9ImoXfzSrfrm6w7mD8vpN7zLNQxrre23tABrTH5benjDf/jrcDbn9dgHVMxwZvxffUW 3w== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qggen8dbr-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 10 May 2023 22:46:27 +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 34AMkQMp023947 (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 15:46:25 -0700 From: Jessica Zhang Date: Wed, 10 May 2023 15:45:52 -0700 Subject: [PATCH v8 1/8] drm/display/dsc: Add flatness and initial scale value calculations MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v8-1-2c9b2bb1209c@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=1328; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=SiPrETtPeQsw6TkRmH6Rnw3iLND9rf5XbK6DmOHqp6g=; b=JlvoWLNAMXuRH2xG2sRzHn2XkDBk700Pod4uAzPjGM97yvQp6EJah1Ylj82oebBdgWUqO/dW1 YyVzSa67T7oDS7hR+jMk/qqdHGTJU80gyukCLoQxKBYE6DeKNXMfekT 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: OJKA7wE1_kbVkFx8oNVP3Kij2xpipJ3p X-Proofpoint-GUID: OJKA7wE1_kbVkFx8oNVP3Kij2xpipJ3p 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 mlxscore=0 phishscore=0 clxscore=1015 lowpriorityscore=0 malwarescore=0 spamscore=0 adultscore=0 suspectscore=0 mlxlogscore=999 impostorscore=0 priorityscore=1501 bulkscore=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 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 Signed-off-by: Dmitry Baryshkov Reviewed-by: Marijn Suijten Signed-off-by: Jessica Zhang --- 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 0bb0c3afd740..422135a33d65 100644 --- a/include/drm/display/drm_dsc_helper.h +++ b/include/drm/display/drm_dsc_helper.h @@ -25,5 +25,16 @@ 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_kind kind); int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg); +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); +} + #endif /* _DRM_DSC_HELPER_H_ */