diff options
| author | Shawn Guo | 2016-12-29 20:41:28 +0800 |
|---|---|---|
| committer | Daniel Vetter | 2016-12-30 12:11:59 +0100 |
| commit | 6d1b81d8e25d81b4ed4363fa3e7d70aa563b7112 (patch) | |
| tree | 71d5df4c60b552f0dc761f5107fb61e5520a8e25 | |
| parent | b5c3714fe8789745521d8351d75049b9c6a0d26b (diff) | |
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 <shawn.guo@linaro.org>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1483015290-16660-2-git-send-email-shawnguo@kernel.org
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 20 | ||||
| -rw-r--r-- | include/drm/drm_crtc.h | 1 |
2 files changed, 21 insertions, 0 deletions
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 @@ -47,6 +47,26 @@ #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, |