On Tue, Apr 09, 2024 at 03:26:44PM +0300, Jani Nikula wrote: > Convert various pointers to struct intel_display * using _Generic(). > > Add some macro magic to make adding new conversions easier, and somewhat > abstract the need to cast each generic association. The cast is required > because all associations needs to compile, regardless of the type and > the generic selection. > > The use of *p in the generic selection assignment expression removes the > need to add separate associations for const pointers. > > Note: This intentionally does *not* cover struct drm_i915_private or > struct xe_device. They are not to be used in the long run, so avoid > using this macro for them. > > Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx> I also missed this. This magic is great, let move with this already Reviewed-by: Rodrigo Vivi <rodrigo.vivi@xxxxxxxxx> > --- > .../drm/i915/display/intel_display_types.h | 37 +++++++++++++++++++ > 1 file changed, 37 insertions(+) > > diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h > index 0f4bd5710796..1be98c4219b0 100644 > --- a/drivers/gpu/drm/i915/display/intel_display_types.h > +++ b/drivers/gpu/drm/i915/display/intel_display_types.h > @@ -2197,4 +2197,41 @@ static inline int to_bpp_x16(int bpp) > return bpp << 4; > } > > +/* > + * Conversion functions/macros from various pointer types to struct > + * intel_display pointer. > + */ > +#define __drm_device_to_intel_display(p) \ > + (&to_i915(p)->display) > +#define __intel_connector_to_intel_display(p) \ > + __drm_device_to_intel_display((p)->base.dev) > +#define __intel_crtc_to_intel_display(p) \ > + __drm_device_to_intel_display((p)->base.dev) > +#define __intel_crtc_state_to_intel_display(p) \ > + __drm_device_to_intel_display((p)->uapi.crtc->dev) > +#define __intel_digital_port_to_intel_display(p) \ > + __drm_device_to_intel_display((p)->base.base.dev) > +#define __intel_dp_to_intel_display(p) \ > + __drm_device_to_intel_display(dp_to_dig_port(p)->base.base.dev) > +#define __intel_encoder_to_intel_display(p) \ > + __drm_device_to_intel_display((p)->base.dev) > +#define __intel_hdmi_to_intel_display(p) \ > + __drm_device_to_intel_display(hdmi_to_dig_port(p)->base.base.dev) > + > +/* Helper for generic association. Map types to conversion functions/macros. */ > +#define __assoc(type, p) \ > + struct type: __##type##_to_intel_display((struct type *)(p)) > + > +/* Convert various pointer types to struct intel_display pointer. */ > +#define to_intel_display(p) \ > + _Generic(*p, \ > + __assoc(drm_device, p), \ > + __assoc(intel_connector, p), \ > + __assoc(intel_crtc, p), \ > + __assoc(intel_crtc_state, p), \ > + __assoc(intel_digital_port, p), \ > + __assoc(intel_dp, p), \ > + __assoc(intel_encoder, p), \ > + __assoc(intel_hdmi, p)) > + > #endif /* __INTEL_DISPLAY_TYPES_H__ */ > -- > 2.39.2 >
