From patchwork Mon Nov 26 09:07:26 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Trumtrar X-Patchwork-Id: 1800951 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 811D0DF2F9 for ; Mon, 26 Nov 2012 09:08:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754677Ab2KZJID (ORCPT ); Mon, 26 Nov 2012 04:08:03 -0500 Received: from metis.ext.pengutronix.de ([92.198.50.35]:42008 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754673Ab2KZJIC (ORCPT ); Mon, 26 Nov 2012 04:08:02 -0500 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 ) id 1TcufJ-00065U-8Q; Mon, 26 Nov 2012 10:07:45 +0100 Received: from str by dude.hi.pengutronix.de with local (Exim 4.80) (envelope-from ) id 1TcufF-00043j-1Y; Mon, 26 Nov 2012 10:07:41 +0100 From: Steffen Trumtrar To: devicetree-discuss@lists.ozlabs.org Cc: Steffen Trumtrar , "Rob Herring" , linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org, "Laurent Pinchart" , "Thierry Reding" , "Guennady Liakhovetski" , linux-media@vger.kernel.org, "Tomi Valkeinen" , "Stephen Warren" , kernel@pengutronix.de, "Florian Tobias Schandinat" , "David Airlie" Subject: [PATCHv15 5/7] fbmon: add of_videomode helpers Date: Mon, 26 Nov 2012 10:07:26 +0100 Message-Id: <1353920848-1705-6-git-send-email-s.trumtrar@pengutronix.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1353920848-1705-1-git-send-email-s.trumtrar@pengutronix.de> References: <1353920848-1705-1-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: linux-media@vger.kernel.org Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Add helper to get fb_videomode from devicetree. Signed-off-by: Steffen Trumtrar Reviewed-by: Thierry Reding Acked-by: Thierry Reding Tested-by: Thierry Reding Tested-by: Philipp Zabel Reviewed-by: Laurent Pinchart Acked-by: Laurent Pinchart Signed-off-by: Steffen Trumtrar --- drivers/video/fbmon.c | 42 ++++++++++++++++++++++++++++++++++++++++++ include/linux/fb.h | 6 ++++++ 2 files changed, 48 insertions(+) diff --git a/drivers/video/fbmon.c b/drivers/video/fbmon.c index 733553b..4a8484d 100644 --- a/drivers/video/fbmon.c +++ b/drivers/video/fbmon.c @@ -28,6 +28,7 @@ */ #include #include +#include #include #include #include @@ -1424,6 +1425,47 @@ int fb_videomode_from_videomode(const struct videomode *vm, EXPORT_SYMBOL_GPL(fb_videomode_from_videomode); #endif +#if IS_ENABLED(CONFIG_OF_VIDEOMODE) +static inline void dump_fb_videomode(const struct fb_videomode *m) +{ + pr_debug("fb_videomode = %ux%u@%uHz (%ukHz) %u %u %u %u %u %u %u %u %u\n", + m->xres, m->yres, m->refresh, m->pixclock, m->left_margin, + m->right_margin, m->upper_margin, m->lower_margin, + m->hsync_len, m->vsync_len, m->sync, m->vmode, m->flag); +} + +/** + * of_get_fb_videomode - get a fb_videomode from devicetree + * @np: device_node with the timing specification + * @fb: will be set to the return value + * @index: index into the list of display timings in devicetree + * + * DESCRIPTION: + * This function is expensive and should only be used, if only one mode is to be + * read from DT. To get multiple modes start with of_get_display_timings ond + * work with that instead. + */ +int of_get_fb_videomode(struct device_node *np, struct fb_videomode *fb, + int index) +{ + struct videomode vm; + int ret; + + ret = of_get_videomode(np, &vm, index); + if (ret) + return ret; + + fb_videomode_from_videomode(&vm, fb); + + pr_info("%s: got %dx%d display mode from %s\n", __func__, vm.hactive, + vm.vactive, np->name); + dump_fb_videomode(fb); + + return 0; +} +EXPORT_SYMBOL_GPL(of_get_fb_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 4404ec2..c2d933d 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -20,6 +20,7 @@ struct fb_info; struct device; struct file; struct videomode; +struct device_node; /* Definitions below are used in the parsed monitor specs */ #define FB_DPMS_ACTIVE_OFF 1 @@ -715,6 +716,11 @@ 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); +#if IS_ENABLED(CONFIG_OF_VIDEOMODE) +extern int of_get_fb_videomode(struct device_node *np, + struct fb_videomode *fb, + int index); +#endif #if IS_ENABLED(CONFIG_VIDEOMODE) extern int fb_videomode_from_videomode(const struct videomode *vm, struct fb_videomode *fbmode);