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author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-22 15:36:24 (GMT) |
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committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2015-01-27 09:02:43 (GMT) |
commit | ee0a89cf3c2c550e6d877dda21dd2947afb90cb6 (patch) | |
tree | 9da7f98114ddc7ca085a169b0a881efc1c80b273 /include/drm | |
parent | f02ad907cd9e7fe3a6405d2d005840912f1ed258 (diff) | |
download | linux-ee0a89cf3c2c550e6d877dda21dd2947afb90cb6.tar.xz |
drm/atomic-helpers: Saner encoder/crtc callbacks
For historical reasons going all the way back to how the Xrandr code
was implemented the semantics of the callbacks used to enable/disable
crtcs and encoders are ... interesting.
But with atomic helpers all that complexity has been binned, with only
a well-defined on/off action left. Unfortunately the names stuck.
Let's fix that by adding enable/disable hooks every, make them the
preferred variant for atomic and update documentations.
Later on we add debug warnings when drivers have deprecated hooks. But
while everything is in-flight with lots of drivers converting to
atomic that's a bit too much - better wait for things to settle a bit
first.
v2: Fix kerneldoc, reported by Wu Fengguang.
Reviewed-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'include/drm')
-rw-r--r-- | include/drm/drm_crtc_helper.h | 20 |
1 files changed, 18 insertions, 2 deletions
diff --git a/include/drm/drm_crtc_helper.h b/include/drm/drm_crtc_helper.h index e76828d..4b19f7a 100644 --- a/include/drm/drm_crtc_helper.h +++ b/include/drm/drm_crtc_helper.h @@ -58,11 +58,19 @@ enum mode_set_atomic { * @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. + * + * With legacy crtc helpers there's a big semantic difference between @disable + * and the other hooks: @disable also needs to release any resources acquired in + * @mode_set (like shared PLLs). */ struct drm_crtc_helper_funcs { /* @@ -93,8 +101,8 @@ struct drm_crtc_helper_funcs { /* reload the current crtc LUT */ void (*load_lut)(struct drm_crtc *crtc); - /* disable crtc when not in use - more explicit than dpms off */ void (*disable)(struct drm_crtc *crtc); + void (*enable)(struct drm_crtc *crtc); /* atomic helpers */ int (*atomic_check)(struct drm_crtc *crtc, @@ -115,8 +123,16 @@ struct drm_crtc_helper_funcs { * @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 * * 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. + * + * With legacy crtc helpers there's a big semantic difference between @disable + * and the other hooks: @disable also needs to release any resources acquired in + * @mode_set (like shared PLLs). */ struct drm_encoder_helper_funcs { void (*dpms)(struct drm_encoder *encoder, int mode); @@ -135,8 +151,8 @@ struct drm_encoder_helper_funcs { /* detect for DAC style encoders */ enum drm_connector_status (*detect)(struct drm_encoder *encoder, struct drm_connector *connector); - /* disable encoder when not in use - more explicit than dpms off */ void (*disable)(struct drm_encoder *encoder); + void (*enable)(struct drm_encoder *encoder); }; /** |