From patchwork Wed May 24 17:45:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jessica Zhang X-Patchwork-Id: 13254407 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 7C9EBC77B7C for ; Wed, 24 May 2023 17:46:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S236165AbjEXRqj (ORCPT ); Wed, 24 May 2023 13:46:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56718 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S236179AbjEXRqh (ORCPT ); Wed, 24 May 2023 13:46:37 -0400 Received: from mx0a-0031df01.pphosted.com (mx0a-0031df01.pphosted.com [205.220.168.131]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0D905186 for ; Wed, 24 May 2023 10:46:11 -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 34OEns1o015401; Wed, 24 May 2023 17:45:36 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=VQy3mfKHk2i7x5VG1IagFalmXYMmgG9jN1vwa6WRk20=; b=nZZjHL953W1oxbpZoI30Kgpkr2+aaUaVzWizwT/BRK77oVu9F2ugWJAhkrq8MgNRYNjx U25SfKNgXxRIBhHHCah+hZWtkJJpT9MJO+ll/o9BK8uw3KPiGrZC5LP74m6Nn0OTXryE 4mQtIO4Adjy9MaiEqA3jZY51ZwP0DaQ9VzP++KmnPgGJsYwb0PbBm/BE4aMTXOJTew48 0SJbouqE0qLCPUl2spP0Uq+Ifcwm8o5HxVZWtejOb1fVA5opse2fV6qs77PTCAkHXNIK hbV2zOs0z1e9saoWJHlg4rTLs0RpQMsLxAV78qrYg1SGUY9PVK+TTGSsSCY2sYsb+xSG 4A== Received: from nasanppmta04.qualcomm.com (i-global254.qualcomm.com [199.106.103.254]) by mx0a-0031df01.pphosted.com (PPS) with ESMTPS id 3qsdhh1fsx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 24 May 2023 17:45:36 +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 34OHjZIW021884 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 24 May 2023 17:45:35 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, 24 May 2023 10:45:34 -0700 From: Jessica Zhang Date: Wed, 24 May 2023 10:45:14 -0700 Subject: [PATCH v14 1/9] drm/display/dsc: Add flatness and initial scale value calculations MIME-Version: 1.0 Message-ID: <20230329-rfc-msm-dsc-helper-v14-1-bafc7be95691@quicinc.com> References: <20230329-rfc-msm-dsc-helper-v14-0-bafc7be95691@quicinc.com> In-Reply-To: <20230329-rfc-msm-dsc-helper-v14-0-bafc7be95691@quicinc.com> To: CC: Marijn Suijten , Konrad Dybcio , Kuogee Hsieh , "Daniel Vetter" , Rob Clark , Jani Nikula , Abhinav Kumar , Dmitry Baryshkov , Sean Paul , , , "Jessica Zhang" X-Mailer: b4 0.13-dev-bfdf5 X-Developer-Signature: v=1; a=ed25519-sha256; t=1684950334; l=2387; i=quic_jesszhan@quicinc.com; s=20230329; h=from:subject:message-id; bh=xjGe2UNkyRMuSXaeNinJgb6hQA9cqK62h9D5nSOCqfU=; b=rweo1lTjnREy0oqGMILL7/AP4KEDBRQn1LYEV9wtvhkiRTS3uroGZzoaXIFFOMbIzGPB8Tz71 egwyv4bR1KdBxdcvG8TRNzGBqVCsXAqEL+iRoCej/J9uqComIXKKCED 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: VYckhBy3dCWRxWQzy6Rk-OyL8FYRMk9w X-Proofpoint-ORIG-GUID: VYckhBy3dCWRxWQzy6Rk-OyL8FYRMk9w X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.254,Aquarius:18.0.957,Hydra:6.0.573,FMLib:17.11.176.26 definitions=2023-05-24_13,2023-05-24_01,2023-05-22_02 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 clxscore=1015 malwarescore=0 bulkscore=0 spamscore=0 mlxscore=0 lowpriorityscore=0 adultscore=0 phishscore=0 impostorscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2304280000 definitions=main-2305240146 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 Reviewed-by: Dmitry Baryshkov Signed-off-by: Jessica Zhang --- drivers/gpu/drm/display/drm_dsc_helper.c | 24 ++++++++++++++++++++++++ include/drm/display/drm_dsc_helper.h | 2 ++ 2 files changed, 26 insertions(+) diff --git a/drivers/gpu/drm/display/drm_dsc_helper.c b/drivers/gpu/drm/display/drm_dsc_helper.c index fc187a8d8873..4efb6236d22c 100644 --- a/drivers/gpu/drm/display/drm_dsc_helper.c +++ b/drivers/gpu/drm/display/drm_dsc_helper.c @@ -1413,3 +1413,27 @@ int drm_dsc_compute_rc_parameters(struct drm_dsc_config *vdsc_cfg) return 0; } EXPORT_SYMBOL(drm_dsc_compute_rc_parameters); + +/** + * drm_dsc_initial_scale_value() - Calculate the initial scale value for the given DSC config + * @dsc: Pointer to DRM DSC config struct + * + * Return: Calculated initial scale value + */ +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); +} +EXPORT_SYMBOL(drm_dsc_initial_scale_value); + +/** + * drm_dsc_flatness_det_thresh() - Calculate the flatness_det_thresh for the given DSC config + * @dsc: Pointer to DRM DSC config struct + * + * Return: Calculated flatness det thresh value + */ +u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc) +{ + return 2 << (dsc->bits_per_component - 8); +} +EXPORT_SYMBOL(drm_dsc_flatness_det_thresh); diff --git a/include/drm/display/drm_dsc_helper.h b/include/drm/display/drm_dsc_helper.h index fc2104415dcb..71789fb34e17 100644 --- a/include/drm/display/drm_dsc_helper.h +++ b/include/drm/display/drm_dsc_helper.h @@ -24,6 +24,8 @@ void drm_dsc_pps_payload_pack(struct drm_dsc_picture_parameter_set *pps_sdp, 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); +u8 drm_dsc_initial_scale_value(const struct drm_dsc_config *dsc); +u32 drm_dsc_flatness_det_thresh(const struct drm_dsc_config *dsc); #endif /* _DRM_DSC_HELPER_H_ */