On Fri, Dec 04, 2015 at 09:45:44AM +0100, Daniel Vetter wrote: [...] > diff --git a/drivers/gpu/drm/drm_crtc_helper.c > b/drivers/gpu/drm/drm_crtc_helper.c > index 10d0989db273..077e48d3cac2 100644 > --- a/drivers/gpu/drm/drm_crtc_helper.c > +++ b/drivers/gpu/drm/drm_crtc_helper.c > @@ -62,6 +62,11 @@ > * converting to the plane helpers). New drivers must not use these functions > * but need to implement the atomic interface instead, potentially using the > * atomic helpers for that. > + * > + * The these legacy modeset helpers use the same function table structures as
s/The these/The/ > diff --git a/include/drm/drm_modeset_helper_vtables.h > b/include/drm/drm_modeset_helper_vtables.h > new file mode 100644 > index 000000000000..35c5a1c4e7ba > --- /dev/null > +++ b/include/drm/drm_modeset_helper_vtables.h > @@ -0,0 +1,252 @@ > +/* > + * Copyright © 2015 Intel Corporation > + * Daniel Vetter <daniel.vet...@ffwll.ch> Perhaps inherit the copyright statements from the includes that you extracted these from? > +/** > + * DOC: overview > + * > + * The DRM mode setting helper functions are common code for drivers to use > if > + * they wish. Drivers are not forced to use this code in their > + * implementations but it would be useful if the code they do use at least > + * provides a consistent interface and operation to userspace. Therefore it > is > + * highly recommended to use the provided helpers as much as possible. > + * > + * Because there is only one pointer per modeset object to hold a vfunc table > + * for helper libraries they are by necessity shared among the different > + * helpers. > + * > + * To make this clear all the helper vtables are pulled together in this > location here. Perhaps drop the "here" at the end of that sentence. Also maybe wrap the last line because it stands out as much longer than the above. > + */ > + > +enum mode_set_atomic; > + > +/** > + * struct drm_crtc_helper_funcs - helper operations for CRTCs > + * @dpms: set power state > + * @prepare: prepare the CRTC, called before @mode_set > + * @commit: commit changes to CRTC, called after @mode_set > + * @mode_fixup: try to fixup proposed mode for this CRTC > + * @mode_set: set this mode > + * @mode_set_nofb: set mode only (no scanout buffer attached) > + * @mode_set_base: update the scanout buffer > + * @mode_set_base_atomic: non-blocking mode set (used for kgdb support) > + * @load_lut: load color palette > + * @disable: disable CRTC when no longer in use > + * @enable: enable CRTC > + * @atomic_check: check for validity of an atomic state > + * @atomic_begin: begin atomic update > + * @atomic_flush: flush atomic update > + * > + * The helper operations are called by the mid-layer CRTC helper. > + * > + * Note that with atomic helpers @dpms, @prepare and @commit hooks are > + * deprecated. Used @enable and @disable instead exclusively. I /think/ it would be more correct to say: "Use @enable and @disable exclusively instead." > + * > + * With legacy crtc helpers there's a big semantic difference between > @disable s/crtc/CRTC/, there's a couple more places where the casing is inconsistent, I'll refrain from pointing them out explicitly since your editor will be much better at finding them. > +/** > + * struct drm_encoder_helper_funcs - helper operations for encoders > + * @dpms: set power state > + * @save: save connector state > + * @restore: restore connector state > + * @mode_fixup: try to fixup proposed mode for this connector > + * @prepare: part of the disable sequence, called before the CRTC modeset > + * @commit: called after the CRTC modeset > + * @mode_set: set this mode, optional for atomic helpers > + * @get_crtc: return CRTC that the encoder is currently attached to > + * @detect: connection status detection > + * @disable: disable encoder when not in use (overrides DPMS off) > + * @enable: enable encoder > + * @atomic_check: check for validity of an atomic update > + * > + * The helper operations are called by the mid-layer CRTC helper. > + * > + * Note that with atomic helpers @dpms, @prepare and @commit hooks are > + * deprecated. Used @enable and @disable instead exclusively. Same comment as for the CRTC helper functions. Thierry
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