From patchwork Sat Aug 8 16:03:45 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 6974931 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9556DC05AC for ; Sat, 8 Aug 2015 16:06:45 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 97E292053B for ; Sat, 8 Aug 2015 16:06:44 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A595A203EC for ; Sat, 8 Aug 2015 16:06:43 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZO6cJ-0004fs-H8; Sat, 08 Aug 2015 16:05:03 +0000 Received: from pandora.arm.linux.org.uk ([2001:4d48:ad52:3201:214:fdff:fe10:1be6]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1ZO6c3-00049T-6r for linux-arm-kernel@lists.infradead.org; Sat, 08 Aug 2015 16:04:53 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=pandora-2014; h=Date:Sender:Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References:In-Reply-To; bh=ZK6zCAPEp6NdrRPIGeZXifTKmmBvVdE/JD+e/9EPUag=; b=G6bjqWMIQ3A+dray4mDp9q8LqgMSp5y2QoLcYeBynAdeeMXoTpbKKm4cqxMlvBSpHujI9cAreHyUJooQRj9PfnTZ0i3UvhdkO8FDjLrSBUVneXc35UNDUA5Yhy6yjI6nDfqPzPmpcJNmT7LmeHHqODbwTPVsjfMNsMUoECFR6G8=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([fd8f:7570:feb6:1:222:68ff:fe15:37dd]:35606 helo=rmk-PC.arm.linux.org.uk) by pandora.arm.linux.org.uk with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1ZO6b9-0006LV-6x; Sat, 08 Aug 2015 17:03:51 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1ZO6b3-0002qv-BK; Sat, 08 Aug 2015 17:03:45 +0100 In-Reply-To: <20150808160251.GM7557@n2100.arm.linux.org.uk> References: <20150808160251.GM7557@n2100.arm.linux.org.uk> From: Russell King To: linux-rockchip@lists.infradead.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 05/12] drm: bridge/dw_hdmi: add support for interlaced video modes MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Sat, 08 Aug 2015 17:03:45 +0100 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150808_090448_798908_29FF2857 X-CRM114-Status: GOOD ( 13.56 ) X-Spam-Score: -2.4 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Fabio Estevam , David Airlie , Sascha Hauer , Philipp Zabel , Yakir Yang , Andy Yan , Jon Nettleton Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,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 Add support for interlaced video modes to the dw_hdmi bridge. This mainly involves halving the vertical parameters to be programmed into the bridge registers, and setting the interlace_allowed connector flag. This brings working 1080i support. However, 480i and 576i fail to work due to the lack of proper pixel repetition support, which is not trivial to add due to the tabular PLL parameterisation. Hence, we filter out these modes in our mode_valid() method. Signed-off-by: Russell King Reviewed-by: Fabio Estevam --- drivers/gpu/drm/bridge/dw_hdmi.c | 26 +++++++++++++++++++++----- 1 file changed, 21 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index 8edf4c31f55c..2e211b8331ed 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -1060,6 +1060,7 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, u8 inv_val; struct hdmi_vmode *vmode = &hdmi->hdmi_data.video_mode; int hblank, vblank, h_de_hs, v_de_vs, hsync_len, vsync_len; + unsigned int vdisplay; vmode->mpixelclock = mode->clock * 1000; @@ -1099,13 +1100,29 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, inv_val, HDMI_FC_INVIDCONF); + vdisplay = mode->vdisplay; + vblank = mode->vtotal - mode->vdisplay; + v_de_vs = mode->vsync_start - mode->vdisplay; + vsync_len = mode->vsync_end - mode->vsync_start; + + /* + * When we're setting an interlaced mode, we need + * to adjust the vertical timing to suit. + */ + if (mode->flags & DRM_MODE_FLAG_INTERLACE) { + vdisplay /= 2; + vblank /= 2; + v_de_vs /= 2; + vsync_len /= 2; + } + /* Set up horizontal active pixel width */ hdmi_writeb(hdmi, mode->hdisplay >> 8, HDMI_FC_INHACTV1); hdmi_writeb(hdmi, mode->hdisplay, HDMI_FC_INHACTV0); /* Set up vertical active lines */ - hdmi_writeb(hdmi, mode->vdisplay >> 8, HDMI_FC_INVACTV1); - hdmi_writeb(hdmi, mode->vdisplay, HDMI_FC_INVACTV0); + hdmi_writeb(hdmi, vdisplay >> 8, HDMI_FC_INVACTV1); + hdmi_writeb(hdmi, vdisplay, HDMI_FC_INVACTV0); /* Set up horizontal blanking pixel region width */ hblank = mode->htotal - mode->hdisplay; @@ -1113,7 +1130,6 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, hblank, HDMI_FC_INHBLANK0); /* Set up vertical blanking pixel region width */ - vblank = mode->vtotal - mode->vdisplay; hdmi_writeb(hdmi, vblank, HDMI_FC_INVBLANK); /* Set up HSYNC active edge delay width (in pixel clks) */ @@ -1122,7 +1138,6 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, h_de_hs, HDMI_FC_HSYNCINDELAY0); /* Set up VSYNC active edge delay (in lines) */ - v_de_vs = mode->vsync_start - mode->vdisplay; hdmi_writeb(hdmi, v_de_vs, HDMI_FC_VSYNCINDELAY); /* Set up HSYNC active pulse width (in pixel clks) */ @@ -1131,7 +1146,6 @@ static void hdmi_av_composer(struct dw_hdmi *hdmi, hdmi_writeb(hdmi, hsync_len, HDMI_FC_HSYNCINWIDTH0); /* Set up VSYNC active edge delay (in lines) */ - vsync_len = mode->vsync_end - mode->vsync_start; hdmi_writeb(hdmi, vsync_len, HDMI_FC_VSYNCINWIDTH); } @@ -1593,6 +1607,8 @@ int dw_hdmi_bind(struct device *dev, struct device *master, if (!hdmi) return -ENOMEM; + hdmi->connector.interlace_allowed = 1; + hdmi->plat_data = plat_data; hdmi->dev = dev; hdmi->dev_type = plat_data->dev_type;