From 6d1b81d8e25d81b4ed4363fa3e7d70aa563b7112 Mon Sep 17 00:00:00 2001 From: Shawn Guo Date: Thu, 29 Dec 2016 20:41:28 +0800 Subject: [PATCH] drm: add crtc helper drm_crtc_from_index() It adds a crtc helper drm_crtc_from_index() to find the registered CRTC with a given index, just like drm_plane_from_index(). Signed-off-by: Shawn Guo Signed-off-by: Daniel Vetter Link: http://patchwork.freedesktop.org/patch/msgid/1483015290-16660-2-git-send-email-shawnguo@kernel.org --- drivers/gpu/drm/drm_crtc.c | 20 ++++++++++++++++++++ include/drm/drm_crtc.h | 1 + 2 files changed, 21 insertions(+) diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 080c8d361f1f..75e0beeb3793 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -46,6 +46,26 @@ #include "drm_crtc_internal.h" #include "drm_internal.h" +/** + * drm_crtc_from_index - find the registered CRTC at an index + * @dev: DRM device + * @idx: index of registered CRTC to find for + * + * Given a CRTC index, return the registered CRTC from DRM device's + * list of CRTCs with matching index. + */ +struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx) +{ + struct drm_crtc *crtc; + + drm_for_each_crtc(crtc, dev) + if (idx == crtc->index) + return crtc; + + return NULL; +} +EXPORT_SYMBOL(drm_crtc_from_index); + /** * drm_crtc_force_disable - Forcibly turn off a CRTC * @crtc: CRTC to turn off diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 6920dee3a2d1..89daa77c37fc 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -822,6 +822,7 @@ int drm_crtc_force_disable(struct drm_crtc *crtc); int drm_crtc_force_disable_all(struct drm_device *dev); int drm_mode_set_config_internal(struct drm_mode_set *set); +struct drm_crtc *drm_crtc_from_index(struct drm_device *dev, int idx); /* Helpers */ static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev, -- 2.20.1