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: 11718217 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 735DE618 for ; Mon, 17 Aug 2020 13:11:53 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 51D462072E for ; Mon, 17 Aug 2020 13:11:53 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (1024-bit key) header.d=mediatek.com header.i=@mediatek.com header.b="ja8TmubB" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 51D462072E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=mediatek.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E31F6E0D4; Mon, 17 Aug 2020 13:11:51 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mailgw02.mediatek.com (unknown [1.203.163.81]) by gabe.freedesktop.org (Postfix) with ESMTP id 4D4BC6E0D4 for ; Mon, 17 Aug 2020 13:11:44 +0000 (UTC) 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 , , 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 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, Jitao Shi , srv_heupstream@mediatek.com, huijuan.xie@mediatek.com, stonea168@163.com, cawa.cheng@mediatek.com, linux-mediatek@lists.infradead.org, yingjoe.chen@mediatek.com, eddie.huang@mediatek.com, linux-arm-kernel@lists.infradead.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" horizontal_backporch_byte should be hbp * bpp - hbp extra bytes. So remove the wrong subtraction 10. Signed-off-by: Jitao Shi Reviewed-by: Chun-Kuang Hu --- drivers/gpu/drm/mediatek/mtk_dsi.c | 9 ++++----- 1 file changed, 4 insertions(+), 5 deletions(-) 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 >