From patchwork Mon Nov 12 15:37:06 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Steffen Trumtrar X-Patchwork-Id: 1728791 Return-Path: X-Original-To: patchwork-linux-fbdev@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 EC097DFE80 for ; Mon, 12 Nov 2012 15:38:17 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753748Ab2KLPiQ (ORCPT ); Mon, 12 Nov 2012 10:38:16 -0500 Received: from metis.ext.pengutronix.de ([92.198.50.35]:33168 "EHLO metis.ext.pengutronix.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753741Ab2KLPiP (ORCPT ); Mon, 12 Nov 2012 10:38:15 -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 1TXw58-000278-Si; Mon, 12 Nov 2012 16:37:50 +0100 Received: from str by dude.hi.pengutronix.de with local (Exim 4.80) (envelope-from ) id 1TXw57-00084m-Bl; Mon, 12 Nov 2012 16:37:49 +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 Subject: [PATCH v8 6/6] drm_modes: add of_videomode helpers Date: Mon, 12 Nov 2012 16:37:06 +0100 Message-Id: <1352734626-27412-7-git-send-email-s.trumtrar@pengutronix.de> X-Mailer: git-send-email 1.7.10.4 In-Reply-To: <1352734626-27412-1-git-send-email-s.trumtrar@pengutronix.de> References: <1352734626-27412-1-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-fbdev@vger.kernel.org Sender: linux-fbdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-fbdev@vger.kernel.org Add helper to get drm_display_mode from devicetree. Signed-off-by: Steffen Trumtrar --- drivers/gpu/drm/drm_modes.c | 41 +++++++++++++++++++++++++++++++++++++++++ include/drm/drmP.h | 5 +++++ 2 files changed, 46 insertions(+) diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c index 049624d..c77da59 100644 --- a/drivers/gpu/drm/drm_modes.c +++ b/drivers/gpu/drm/drm_modes.c @@ -35,6 +35,7 @@ #include #include #include +#include #include /** @@ -540,6 +541,46 @@ int videomode_to_display_mode(struct videomode *vm, struct drm_display_mode *dmo EXPORT_SYMBOL_GPL(videomode_to_display_mode); #endif +#if IS_ENABLED(CONFIG_OF_VIDEOMODE) +static void dump_drm_displaymode(struct drm_display_mode *m) +{ + pr_debug("drm_displaymode = %d %d %d %d %d %d %d %d %d\n", + m->hdisplay, m->hsync_start, m->hsync_end, m->htotal, + m->vdisplay, m->vsync_start, m->vsync_end, m->vtotal, + m->clock); +} + +/** + * of_get_drm_display_mode - get a drm_display_mode from devicetree + * @np: device_node with the timing specification + * @dmode: will be set to the return value + * @index: index into the list of display timings in devicetree + * + * 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 and + * work with that instead. + */ +int of_get_drm_display_mode(struct device_node *np, struct drm_display_mode *dmode, + int index) +{ + struct videomode vm; + int ret; + + ret = of_get_videomode(np, &vm, index); + if (ret) + return ret; + + videomode_to_display_mode(&vm, dmode); + + pr_info("%s: got %dx%d display mode from %s\n", __func__, vm.hactive, + vm.vactive, np->name); + dump_drm_displaymode(dmode); + + return 0; + +} +EXPORT_SYMBOL_GPL(of_get_drm_display_mode); +#endif /** * drm_mode_set_name - set the name on a mode * @mode: name will be set in this mode diff --git a/include/drm/drmP.h b/include/drm/drmP.h index e9fa1e3..4f9c44e 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -56,6 +56,7 @@ #include #include #include +#include #include #if defined(__alpha__) || defined(__powerpc__) #include /* For pte_wrprotect */ @@ -1457,6 +1458,10 @@ drm_mode_create_from_cmdline_mode(struct drm_device *dev, extern int videomode_to_display_mode(struct videomode *vm, struct drm_display_mode *dmode); +extern int of_get_drm_display_mode(struct device_node *np, + struct drm_display_mode *dmode, + int index); + /* Modesetting support */ extern void drm_vblank_pre_modeset(struct drm_device *dev, int crtc); extern void drm_vblank_post_modeset(struct drm_device *dev, int crtc);