From patchwork Wed Jun 17 12:54:35 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 6625561 Return-Path: X-Original-To: patchwork-linux-fbdev@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 453BB9F326 for ; Wed, 17 Jun 2015 12:55:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 701FE20853 for ; Wed, 17 Jun 2015 12:55:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 78D5420854 for ; Wed, 17 Jun 2015 12:55:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1756391AbbFQMzJ (ORCPT ); Wed, 17 Jun 2015 08:55:09 -0400 Received: from arroyo.ext.ti.com ([192.94.94.40]:43914 "EHLO arroyo.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755532AbbFQMzF (ORCPT ); Wed, 17 Jun 2015 08:55:05 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by arroyo.ext.ti.com (8.13.7/8.13.7) with ESMTP id t5HCt2Md024950; Wed, 17 Jun 2015 07:55:02 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id t5HCt2Ri021937; Wed, 17 Jun 2015 07:55:02 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.224.2; Wed, 17 Jun 2015 07:55:02 -0500 Received: from deskari.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id t5HCsi7U002601; Wed, 17 Jun 2015 07:55:01 -0500 From: Tomi Valkeinen To: Laurent Pinchart , , CC: Tomi Valkeinen Subject: [PATCH 11/11] OMAPDSS: HDMI: wait for framedone when stopping video Date: Wed, 17 Jun 2015 15:54:35 +0300 Message-ID: <1434545675-477-12-git-send-email-tomi.valkeinen@ti.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <1434545675-477-1-git-send-email-tomi.valkeinen@ti.com> References: <1434545675-477-1-git-send-email-tomi.valkeinen@ti.com> MIME-Version: 1.0 Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org X-Spam-Status: No, score=-7.5 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP At the moment when HDMI video output is stopped, we just clear the enable bit and return. While it's unclear if this can cause any issues, I think it's still better to wait for FRAMEDONE interrupt after clearing the enable bit so that we're sure the HDMI IP has finished. As we don't have any ready-made irq handling for HDMI, and this only needs to be done when disabling the HDMI output, this patch implements a simple loop with sleep, polling the FRAMEDONE bit. Signed-off-by: Tomi Valkeinen --- drivers/video/fbdev/omap2/dss/hdmi_wp.c | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/drivers/video/fbdev/omap2/dss/hdmi_wp.c b/drivers/video/fbdev/omap2/dss/hdmi_wp.c index c15377e242cc..7c544bc56fb5 100644 --- a/drivers/video/fbdev/omap2/dss/hdmi_wp.c +++ b/drivers/video/fbdev/omap2/dss/hdmi_wp.c @@ -110,7 +110,23 @@ int hdmi_wp_video_start(struct hdmi_wp_data *wp) void hdmi_wp_video_stop(struct hdmi_wp_data *wp) { + int i; + + hdmi_write_reg(wp->base, HDMI_WP_IRQSTATUS, HDMI_IRQ_VIDEO_FRAME_DONE); + REG_FLD_MOD(wp->base, HDMI_WP_VIDEO_CFG, false, 31, 31); + + for (i = 0; i < 50; ++i) { + u32 v; + + msleep(20); + + v = hdmi_read_reg(wp->base, HDMI_WP_IRQSTATUS_RAW); + if (v & HDMI_IRQ_VIDEO_FRAME_DONE) + return; + } + + DSSERR("no HDMI FRAMEDONE when disabling output\n"); } void hdmi_wp_video_config_format(struct hdmi_wp_data *wp,