From patchwork Thu Jun 9 13:56:25 2011 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 865002 X-Patchwork-Delegate: tomi.valkeinen@nokia.com Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by demeter1.kernel.org (8.14.4/8.14.4) with ESMTP id p59Dv5lh009936 for ; Thu, 9 Jun 2011 13:58:05 GMT Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758014Ab1FIN5M (ORCPT ); Thu, 9 Jun 2011 09:57:12 -0400 Received: from na3sys009aog117.obsmtp.com ([74.125.149.242]:36801 "EHLO na3sys009aog117.obsmtp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757817Ab1FIN5K (ORCPT ); Thu, 9 Jun 2011 09:57:10 -0400 Received: from mail-fx0-f50.google.com ([209.85.161.50]) (using TLSv1) by na3sys009aob117.postini.com ([74.125.148.12]) with SMTP ID DSNKTfDRNcvSLfMz21KwTKat4qRJgDDIIKST@postini.com; Thu, 09 Jun 2011 06:57:10 PDT Received: by mail-fx0-f50.google.com with SMTP id 16so1301363fxm.23 for ; Thu, 09 Jun 2011 06:57:09 -0700 (PDT) Received: by 10.223.27.195 with SMTP id j3mr855882fac.83.1307627828992; Thu, 09 Jun 2011 06:57:08 -0700 (PDT) Received: from localhost.localdomain (a62-248-131-233.elisa-laajakaista.fi [62.248.131.233]) by mx.google.com with ESMTPS id q10sm669900fan.8.2011.06.09.06.57.05 (version=SSLv3 cipher=OTHER); Thu, 09 Jun 2011 06:57:07 -0700 (PDT) From: Tomi Valkeinen To: linux-omap@vger.kernel.org, linux-fbdev@vger.kernel.org Cc: b-cousson@ti.com, paul@pwsan.com, khilman@ti.com, Tomi Valkeinen Subject: [PATCHv2 03/28] OMAP: DSS2: Reset LANEx_ULPS_SIG2 bits after use Date: Thu, 9 Jun 2011 16:56:25 +0300 Message-Id: <1307627810-3768-4-git-send-email-tomi.valkeinen@ti.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1307627810-3768-1-git-send-email-tomi.valkeinen@ti.com> References: <1307627810-3768-1-git-send-email-tomi.valkeinen@ti.com> Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Greylist: IP, sender and recipient auto-whitelisted, not delayed by milter-greylist-4.2.6 (demeter1.kernel.org [140.211.167.41]); Thu, 09 Jun 2011 13:58:05 +0000 (UTC) LANEx_ULPS_SIG2 bits are left on after entering ULPS. This doesn't cause any problems currently, as DSI HW is reset when it is enabled. However, if the reset is not done, operation fails if the bits are still set. So reset the bits after entering ULPS to ensure operation even without HW reset. Signed-off-by: Tomi Valkeinen --- drivers/video/omap2/dss/dsi.c | 4 ++++ 1 files changed, 4 insertions(+), 0 deletions(-) diff --git a/drivers/video/omap2/dss/dsi.c b/drivers/video/omap2/dss/dsi.c index 69c2d4f..4496d09 100644 --- a/drivers/video/omap2/dss/dsi.c +++ b/drivers/video/omap2/dss/dsi.c @@ -3395,6 +3395,10 @@ static int dsi_enter_ulps(struct platform_device *dsidev) dsi_unregister_isr_cio(dsidev, dsi_completion_handler, &completion, DSI_CIO_IRQ_ULPSACTIVENOT_ALL0); + /* Reset LANEx_ULPS_SIG2 */ + REG_FLD_MOD(dsidev, DSI_COMPLEXIO_CFG2, (0 << 0) | (0 << 1) | (0 << 2), + 7, 5); + dsi_cio_power(dsidev, DSI_COMPLEXIO_POWER_ULPS); dsi_if_enable(dsidev, false);