From patchwork Tue May 9 22:06:47 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 680598 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 BD8D6C7EE23 for ; Tue, 9 May 2023 22:07:18 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236000AbjEIWHR (ORCPT ); Tue, 9 May 2023 18:07:17 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51124 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235535AbjEIWHP (ORCPT ); Tue, 9 May 2023 18:07:15 -0400 Received: from mx0b-0031df01.pphosted.com (mx0b-0031df01.pphosted.com [205.220.180.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id E982C449C for ; Tue, 9 May 2023 15:07:12 -0700 (PDT) Received: from pps.filterd (m0279871.ppops.net [127.0.0.1]) by mx0a-0031df01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 349LtiSq019388; Tue, 9 May 2023 22:07:06 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=i+ycqDkIhQ+poeNyZiOh84lY9hOlRMVjI908m7BtgZM=; b=PqQ08ECUCXM5JFcQNQiMOIrrp/20PcZmn4ckmPNUOposDZoVEL0mI4PUnvwiTvYj+elJ +kTu1gZik06wlzXHfxdEU6Q2FTs0Dn1K5MxL5GYEdfsXdmM8gdwF41GKWyqZVohFfiEB UK+p8y0fHj/wh9VIMuth8MJF3wFy1ELXeG36GHl6HNXtUPSpQEPpJAyuZSAXeTznqO8V XCH7zy1XwuO7fOCvSs6Z/odpTM3NEpRJobdry6KImtQvITEQX/ydtVmHNbwk7Y19hDip /3a3TrGLy88L8ECYCkMKrHcAbZHqPphl5G3dfGjRLCaalWdmgQGJlBE/DSlDEIqsTAMV Zg== Received: from nasanppmta01.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qf785awuw-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 09 May 2023 22:07:05 +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 349M747t028191 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 9 May 2023 22:07:04 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; Tue, 9 May 2023 15:07:04 -0700 From: Jessica Zhang Date: Tue, 9 May 2023 15:06:47 -0700 Subject: [PATCH v7 1/8] drm/display/dsc: Add flatness and initial scale value calculations MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v7-1-df48a2c54421@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v7-0-df48a2c54421@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v7-0-df48a2c54421@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-bfdf5 X-Developer-Signature: v=1; a=ed25519-sha256; t=1683670024; l=1209; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=X1P2dRr1XjWxM2mEJq0Khyu3/P9/NnHWAmw6Bg9zkIU=; b=nw+fV2iHIKtM7UuUuxdRziGsmgSthZvpUreRMJjfSKFhs2IJ/bK7dKCy4rcivTD46orJKqInI vHq9wco/VkIDRvFPZJGqV3yXkc4HMR1C8P3expRgX5mWVlqLovO979B 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: Wvwbeen87OeGc73105BadCzmRlTOtC7o X-Proofpoint-GUID: Wvwbeen87OeGc73105BadCzmRlTOtC7o 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=2023-05-09_14,2023-05-05_01,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 phishscore=0 bulkscore=0 adultscore=0 priorityscore=1501 mlxlogscore=999 lowpriorityscore=0 malwarescore=0 mlxscore=0 impostorscore=0 clxscore=1015 spamscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305090180 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: Dmitry Baryshkov Signed-off-by: Jessica Zhang Reviewed-by: Marijn Suijten --- 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_ */