From mboxrd@z Thu Jan 1 00:00:00 1970 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=-9.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 34F94C04AB3 for ; Mon, 27 May 2019 10:22:27 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 09F612133F for ; Mon, 27 May 2019 10:22:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=st.com header.i=@st.com header.b="gvnKygsU" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726933AbfE0KW0 (ORCPT ); Mon, 27 May 2019 06:22:26 -0400 Received: from mx08-00178001.pphosted.com ([91.207.212.93]:8766 "EHLO mx07-00178001.pphosted.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726313AbfE0KWZ (ORCPT ); Mon, 27 May 2019 06:22:25 -0400 Received: from pps.filterd (m0046660.ppops.net [127.0.0.1]) by mx08-00178001.pphosted.com (8.16.0.27/8.16.0.27) with SMTP id x4RAGcSf031336; Mon, 27 May 2019 12:21:49 +0200 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=st.com; h=from : to : subject : date : message-id : in-reply-to : references : mime-version : content-type : content-transfer-encoding; s=STMicroelectronics; bh=wps+SDKyn14/sTW3Eret7RKWvrgnINJUAp0gJ+ptxDk=; b=gvnKygsUyE2/7zsLmyK3byjlXUl15AlFFGnZXXay4/tht9zRv0eFUjQgboXgGkVkG6Ju h6ku6Z4gIaLCcqeKKfwVIPusDk/0Oy3k+890b3+4a4eN6K/7Wa9E6UX937/Jk0ASBT28 GIsazNr4pqEgE5PqEB56/cMIKYtdOV2AP+YzakDwVLsDTBBc0d1tmcSwc43jyCFgGZ45 UuyhgsE9EvSEnT6EvTr4+zJYzQl6Z1n2kVnBN4V/LMmptiT7oARZ9K6focryReCaPmPt GNzKaHf/PobBU0uG+2eq0wsvL/C9U6wYA74KR82gQQe4LI8RRhCOwuLAjD1kKNDzKcD1 uQ== Received: from beta.dmz-eu.st.com (beta.dmz-eu.st.com [164.129.1.35]) by mx08-00178001.pphosted.com with ESMTP id 2sptu9jjhj-1 (version=TLSv1 cipher=ECDHE-RSA-AES256-SHA bits=256 verify=NOT); Mon, 27 May 2019 12:21:49 +0200 Received: from zeta.dmz-eu.st.com (zeta.dmz-eu.st.com [164.129.230.9]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id C31B531; Mon, 27 May 2019 10:21:48 +0000 (GMT) Received: from Webmail-eu.st.com (Safex1hubcas21.st.com [10.75.90.44]) by zeta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 89C692805; Mon, 27 May 2019 10:21:48 +0000 (GMT) Received: from SAFEX1HUBCAS23.st.com (10.75.90.47) by SAFEX1HUBCAS21.st.com (10.75.90.44) with Microsoft SMTP Server (TLS) id 14.3.439.0; Mon, 27 May 2019 12:21:48 +0200 Received: from localhost (10.201.23.97) by webmail-ga.st.com (10.75.90.48) with Microsoft SMTP Server (TLS) id 14.3.439.0; Mon, 27 May 2019 12:21:48 +0200 From: =?UTF-8?q?Yannick=20Fertr=C3=A9?= To: Andrzej Hajda , Laurent Pinchart , David Airlie , "Daniel Vetter" , Heiko Stuebner , Sam Ravnborg , Yannick Fertre , Nickey Yang , Philippe Cornu , Benjamin Gaignard , Vincent Abriou , Maxime Coquelin , Alexandre Torgue , , , , Subject: [PATCH v1 2/2] drm/stm: dsi: add power on/off phy ops Date: Mon, 27 May 2019 12:21:39 +0200 Message-ID: <1558952499-15418-3-git-send-email-yannick.fertre@st.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1558952499-15418-1-git-send-email-yannick.fertre@st.com> References: <1558952499-15418-1-git-send-email-yannick.fertre@st.com> MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 8bit X-Originating-IP: [10.201.23.97] X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:,, definitions=2019-05-27_07:,, signatures=0 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These new physical operations are helpful to power_on/off the dsi wrapper. If the dsi wrapper is powered in video mode, the display controller (ltdc) register access will hang when DSI fifos are full. Signed-off-by: Yannick Fertré --- drivers/gpu/drm/stm/dw_mipi_dsi-stm.c | 21 ++++++++++++++++++++- 1 file changed, 20 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c index 01db020..0ab32fe 100644 --- a/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c +++ b/drivers/gpu/drm/stm/dw_mipi_dsi-stm.c @@ -210,10 +210,27 @@ static int dw_mipi_dsi_phy_init(void *priv_data) if (ret) DRM_DEBUG_DRIVER("!TIMEOUT! waiting PLL, let's continue\n"); + return 0; +} + +static void dw_mipi_dsi_phy_power_on(void *priv_data) +{ + struct dw_mipi_dsi_stm *dsi = priv_data; + + DRM_DEBUG_DRIVER("\n"); + /* Enable the DSI wrapper */ dsi_set(dsi, DSI_WCR, WCR_DSIEN); +} - return 0; +static void dw_mipi_dsi_phy_power_off(void *priv_data) +{ + struct dw_mipi_dsi_stm *dsi = priv_data; + + DRM_DEBUG_DRIVER("\n"); + + /* Disable the DSI wrapper */ + dsi_clear(dsi, DSI_WCR, WCR_DSIEN); } static int @@ -287,6 +304,8 @@ dw_mipi_dsi_get_lane_mbps(void *priv_data, const struct drm_display_mode *mode, static const struct dw_mipi_dsi_phy_ops dw_mipi_dsi_stm_phy_ops = { .init = dw_mipi_dsi_phy_init, + .power_on = dw_mipi_dsi_phy_power_on, + .power_off = dw_mipi_dsi_phy_power_off, .get_lane_mbps = dw_mipi_dsi_get_lane_mbps, }; -- 2.7.4