From patchwork Mon Aug 17 13:06:40 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jitao Shi X-Patchwork-Id: 253688 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-11.1 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, MIME_BASE64_TEXT, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, UNPARSEABLE_RELAY,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 24F3AC433E3 for ; Mon, 17 Aug 2020 13:07:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id EE7F32072E for ; Mon, 17 Aug 2020 13:07:39 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="ja8TmubB" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728530AbgHQNHh (ORCPT ); Mon, 17 Aug 2020 09:07:37 -0400 Received: from mailgw02.mediatek.com ([1.203.163.81]:9462 "EHLO mailgw02.mediatek.com" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1728537AbgHQNHH (ORCPT ); Mon, 17 Aug 2020 09:07:07 -0400 X-UUID: cc3a7c998d4e41beb86266ca4ca0c93f-20200817 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=mediatek.com; s=dk; h=Content-Transfer-Encoding:Content-Type:MIME-Version:Message-ID:Date:Subject:CC:To:From; bh=Kc2wbQ5/5ctPeZ+MBcGEqqORVXhdRTfyC3iZHOQDq5c=; b=ja8TmubBv78/qB7FOeuvo3C9/tBdX+EV2uq7cuJQ58QN9JBAue9/G6c44JFV5RF0z6Ido+6i4SoKC0/GiDsGql08SsZ39U+1kAL58NXVp+9yt8NXU5RT+/bfXvHePAEhlR8NQ5Rq6UWPYlSMRiuNE2FD601f//1hTUIjCXEEkLU=; X-UUID: cc3a7c998d4e41beb86266ca4ca0c93f-20200817 Received: from mtkcas36.mediatek.inc [(172.27.4.253)] by mailgw02.mediatek.com (envelope-from ) (mailgw01.mediatek.com ESMTP with TLS) with ESMTP id 1227788580; Mon, 17 Aug 2020 21:06:38 +0800 Received: from MTKCAS36.mediatek.inc (172.27.4.186) by MTKMBS33N1.mediatek.inc (172.27.4.75) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Mon, 17 Aug 2020 21:06:36 +0800 Received: from mszsdaap41.gcn.mediatek.inc (10.16.6.141) by MTKCAS36.mediatek.inc (172.27.4.170) with Microsoft SMTP Server id 15.0.1497.2 via Frontend Transport; Mon, 17 Aug 2020 21:06:35 +0800 From: Jitao Shi To: Rob Herring , Mark Rutland , Matthias Brugger , Daniel Vetter , David Airlie , , CC: , , , , , , , , , , , Jitao Shi Subject: [PATCH v2] drm/mediatek: dsi: fix scrolling of panel with small hfp or hbp Date: Mon, 17 Aug 2020 21:06:40 +0800 Message-ID: <20200817130640.18021-1-jitao.shi@mediatek.com> X-Mailer: git-send-email 2.12.5 MIME-Version: 1.0 X-TM-SNTS-SMTP: 4BE646BE1621BC9DA9C810CAA548159897D201F4DC13F4A0D86FCF88B04C65B62000:8 X-MTK: N Sender: devicetree-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org horizontal_backporch_byte should be hbp * bpp - hbp extra bytes. So remove the wrong subtraction 10. Signed-off-by: Jitao Shi --- drivers/gpu/drm/mediatek/mtk_dsi.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) -- 2.12.5 diff --git a/drivers/gpu/drm/mediatek/mtk_dsi.c b/drivers/gpu/drm/mediatek/mtk_dsi.c index 270bf22c98fe..5d031e634571 100644 --- a/drivers/gpu/drm/mediatek/mtk_dsi.c +++ b/drivers/gpu/drm/mediatek/mtk_dsi.c @@ -473,14 +473,13 @@ static void mtk_dsi_config_vdo_timing(struct mtk_dsi *dsi) horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10); if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) - horizontal_backporch_byte = - (vm->hback_porch * dsi_tmp_buf_bpp - 10); + horizontal_backporch_byte = vm->hback_porch * dsi_tmp_buf_bpp; else - horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) * - dsi_tmp_buf_bpp - 10); + horizontal_backporch_byte = (vm->hback_porch + vm->hsync_len) * + dsi_tmp_buf_bpp; data_phy_cycles = timing->lpx + timing->da_hs_prepare + - timing->da_hs_zero + timing->da_hs_exit + 3; + timing->da_hs_zero + timing->da_hs_exit; if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) { if ((vm->hfront_porch + vm->hback_porch) * dsi_tmp_buf_bpp >