| Message ID | 20241216-concurrent-wb-v4-1-fe220297a7f0@quicinc.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | drm/msm/dpu: Add Concurrent Writeback Support for DPU 10.x+ | expand |
On 12/16/2024 4:43 PM, Jessica Zhang wrote: > 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> > --- > drivers/gpu/drm/drm_crtc.c | 20 ++++++++++++++++++++ > include/drm/drm_crtc.h | 2 +- > 2 files changed, 21 insertions(+), 1 deletion(-) > Reviewed-by: Abhinav Kumar <quic_abhinavk@quicinc.com>
On Mon, 16 Dec 2024 16:43:12 -0800, Jessica Zhang wrote: > 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: Maxime Ripard <mripard@kernel.org> Thanks! Maxime
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 3488ff067c69bb820b36177c97bc9fe5d5cbfea1..46655339003db2a1b43441434839e26f61d79b4e 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 8b48a1974da3143c7de176e6fe3e01da9c8fc9d8..caa56e039da2a748cf40ebf45b37158acda439d9 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__ */
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> --- drivers/gpu/drm/drm_crtc.c | 20 ++++++++++++++++++++ include/drm/drm_crtc.h | 2 +- 2 files changed, 21 insertions(+), 1 deletion(-)