diff options
| author | Jessica Zhang <quic_jesszhan@quicinc.com> | 2024-12-16 16:43:12 -0800 |
|---|---|---|
| committer | Dmitry Baryshkov <dmitry.baryshkov@linaro.org> | 2025-01-08 01:39:58 +0200 |
| commit | eee0912a7185d5dc0a700d48f7ff620bb7f5389b (patch) | |
| tree | 0de0e33b2428cbac0aa5f405893d4e2c56404b75 | |
| parent | 73d934d7b6e39a3e52586467a30ca3ff3f6f9eb4 (diff) | |
drm: add clone mode check for CRTC
Add a common helper to check if the given CRTC state is in clone mode.
This can be used by drivers to help detect if a CRTC is being shared by
multiple encoders
Signed-off-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241216-concurrent-wb-v4-1-fe220297a7f0@quicinc.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
| -rw-r--r-- | drivers/gpu/drm/drm_crtc.c | 20 | ||||
| -rw-r--r-- | include/drm/drm_crtc.h | 2 |
2 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 3488ff067c69..46655339003d 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -939,3 +939,23 @@ int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, return 0; } EXPORT_SYMBOL(drm_crtc_create_scaling_filter_property); + +/** + * drm_crtc_in_clone_mode - check if the given CRTC state is in clone mode + * + * @crtc_state: CRTC state to check + * + * This function determines if the given CRTC state is being cloned by multiple + * encoders. + * + * RETURNS: + * True if the CRTC state is in clone mode. False otherwise + */ +bool drm_crtc_in_clone_mode(struct drm_crtc_state *crtc_state) +{ + if (!crtc_state) + return false; + + return hweight32(crtc_state->encoder_mask) > 1; +} +EXPORT_SYMBOL(drm_crtc_in_clone_mode); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 8b48a1974da3..caa56e039da2 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -1323,5 +1323,5 @@ static inline struct drm_crtc *drm_crtc_find(struct drm_device *dev, int drm_crtc_create_scaling_filter_property(struct drm_crtc *crtc, unsigned int supported_filters); - +bool drm_crtc_in_clone_mode(struct drm_crtc_state *crtc_state); #endif /* __DRM_CRTC_H__ */ |