From patchwork Tue Dec 18 16:57:50 2012
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Steffen Trumtrar <s.trumtrar@pengutronix.de>
X-Patchwork-Id: 1892711
Return-Path: 
 <dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org>
X-Original-To: patchwork-dri-devel@patchwork.kernel.org
Delivered-To: patchwork-process-083081@patchwork1.kernel.org
Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177])
	by patchwork1.kernel.org (Postfix) with ESMTP id 3B5C53FC64
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Tue, 18 Dec 2012 17:03:05 +0000 (UTC)
Received: from gabe.freedesktop.org (localhost [127.0.0.1])
	by gabe.freedesktop.org (Postfix) with ESMTP id 3FFC0E6319
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Tue, 18 Dec 2012 09:03:05 -0800 (PST)
X-Original-To: dri-devel@lists.freedesktop.org
Delivered-To: dri-devel@lists.freedesktop.org
Received: from metis.ext.pengutronix.de (metis.ext.pengutronix.de
	[92.198.50.35])
	by gabe.freedesktop.org (Postfix) with ESMTP id A46D7E6314
	for <dri-devel@lists.freedesktop.org>;
	Tue, 18 Dec 2012 08:58:12 -0800 (PST)
Received: from dude.hi.pengutronix.de ([2001:6f8:1178:2:21e:67ff:fe11:9c5c])
	by metis.ext.pengutronix.de with esmtp (Exim 4.72)
	(envelope-from <str@pengutronix.de>)
	id 1Tl0UR-0001VZ-Ke; Tue, 18 Dec 2012 17:57:59 +0100
Received: from str by dude.hi.pengutronix.de with local (Exim 4.80)
	(envelope-from <str@pengutronix.de>)
	id 1Tl0UP-00020V-5B; Tue, 18 Dec 2012 17:57:57 +0100
From: Steffen Trumtrar <s.trumtrar@pengutronix.de>
To: devicestree-discuss@lists.ozlabs.org
Subject: [PATCHv16 4/7] fbmon: add videomode helpers
Date: Tue, 18 Dec 2012 17:57:50 +0100
Message-Id: <1355849873-8051-5-git-send-email-s.trumtrar@pengutronix.de>
X-Mailer: git-send-email 1.7.10.4
In-Reply-To: <1355849873-8051-1-git-send-email-s.trumtrar@pengutronix.de>
References: <1355849873-8051-1-git-send-email-s.trumtrar@pengutronix.de>
X-SA-Exim-Connect-IP: 2001:6f8:1178:2:21e:67ff:fe11:9c5c
X-SA-Exim-Mail-From: str@pengutronix.de
X-SA-Exim-Scanned: No (on metis.ext.pengutronix.de);
	SAEximRunCond expanded to false
X-PTX-Original-Recipient: dri-devel@lists.freedesktop.org
Cc: linux-fbdev@vger.kernel.org, Stephen Warren <swarren@wwwdotorg.org>,
	Florian Tobias Schandinat <FlorianSchandinat@gmx.de>,
	dri-devel@lists.freedesktop.org, Tomi Valkeinen <tomi.valkeinen@ti.com>,
	Rob Herring <robherring2@gmail.com>,
	Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
	kernel@pengutronix.de, Steffen Trumtrar <s.trumtrar@pengutronix.de>,
	Guennady Liakhovetski <g.liakhovetski@gmx.de>,
	linux-media@vger.kernel.org
X-BeenThere: dri-devel@lists.freedesktop.org
X-Mailman-Version: 2.1.13
Precedence: list
List-Id: Direct Rendering Infrastructure - Development
	<dri-devel.lists.freedesktop.org>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
MIME-Version: 1.0
Sender: 
 dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org
Errors-To: 
 dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org

Add a function to convert from the generic videomode to a fb_videomode.

Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de>
Reviewed-by: Thierry Reding <thierry.reding@avionic-design.de>
Acked-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Thierry Reding <thierry.reding@avionic-design.de>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/video/fbmon.c |   52 +++++++++++++++++++++++++++++++++++++++++++++++++
 include/linux/fb.h    |    4 ++++
 2 files changed, 56 insertions(+)

diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c
index cef6557..17ce135 100644
--- a/drivers/video/fbmon.c
+++ b/drivers/video/fbmon.c
@@ -31,6 +31,7 @@
 #include <linux/pci.h>
 #include <linux/slab.h>
 #include <video/edid.h>
+#include <video/videomode.h>
 #ifdef CONFIG_PPC_OF
 #include <asm/prom.h>
 #include <asm/pci-bridge.h>
@@ -1373,6 +1374,57 @@ int fb_get_mode(int flags, u32 val, struct fb_var_screeninfo *var, struct fb_inf
 	kfree(timings);
 	return err;
 }
+
+#if IS_ENABLED(CONFIG_VIDEOMODE)
+int fb_videomode_from_videomode(const struct videomode *vm,
+				struct fb_videomode *fbmode)
+{
+	unsigned int htotal, vtotal;
+
+	fbmode->xres = vm->hactive;
+	fbmode->left_margin = vm->hback_porch;
+	fbmode->right_margin = vm->hfront_porch;
+	fbmode->hsync_len = vm->hsync_len;
+
+	fbmode->yres = vm->vactive;
+	fbmode->upper_margin = vm->vback_porch;
+	fbmode->lower_margin = vm->vfront_porch;
+	fbmode->vsync_len = vm->vsync_len;
+
+	/* prevent division by zero in KHZ2PICOS macro */
+	fbmode->pixclock = vm->pixelclock ?
+			KHZ2PICOS(vm->pixelclock / 1000) : 0;
+
+	fbmode->sync = 0;
+	fbmode->vmode = 0;
+	if (vm->dmt_flags & VESA_DMT_HSYNC_HIGH)
+		fbmode->sync |= FB_SYNC_HOR_HIGH_ACT;
+	if (vm->dmt_flags & VESA_DMT_HSYNC_HIGH)
+		fbmode->sync |= FB_SYNC_VERT_HIGH_ACT;
+	if (vm->data_flags & DISPLAY_FLAGS_INTERLACED)
+		fbmode->vmode |= FB_VMODE_INTERLACED;
+	if (vm->data_flags & DISPLAY_FLAGS_DOUBLESCAN)
+		fbmode->vmode |= FB_VMODE_DOUBLE;
+	fbmode->flag = 0;
+
+	htotal = vm->hactive + vm->hfront_porch + vm->hback_porch +
+		 vm->hsync_len;
+	vtotal = vm->vactive + vm->vfront_porch + vm->vback_porch +
+		 vm->vsync_len;
+	/* prevent division by zero */
+	if (htotal && vtotal) {
+		fbmode->refresh = vm->pixelclock / (htotal * vtotal);
+	/* a mode must have htotal and vtotal != 0 or it is invalid */
+	} else {
+		fbmode->refresh = 0;
+		return -EINVAL;
+	}
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(fb_videomode_from_videomode);
+#endif
+
 #else
 int fb_parse_edid(unsigned char *edid, struct fb_var_screeninfo *var)
 {
diff --git a/include/linux/fb.h b/include/linux/fb.h
index c7a9571..100a176 100644
--- a/include/linux/fb.h
+++ b/include/linux/fb.h
@@ -19,6 +19,7 @@ struct vm_area_struct;
 struct fb_info;
 struct device;
 struct file;
+struct videomode;
 
 /* Definitions below are used in the parsed monitor specs */
 #define FB_DPMS_ACTIVE_OFF	1
@@ -714,6 +715,9 @@ extern void fb_destroy_modedb(struct fb_videomode *modedb);
 extern int fb_find_mode_cvt(struct fb_videomode *mode, int margins, int rb);
 extern unsigned char *fb_ddc_read(struct i2c_adapter *adapter);
 
+extern int fb_videomode_from_videomode(const struct videomode *vm,
+				       struct fb_videomode *fbmode);
+
 /* drivers/video/modedb.c */
 #define VESA_MODEDB_SIZE 34
 extern void fb_var_to_videomode(struct fb_videomode *mode,