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/*
* Copyright © 2006 Keith Packard
* Copyright © 2007-2008 Dave Airlie
* Copyright © 2007-2008 Intel Corporation
* Jesse Barnes <jesse.barnes@intel.com>
* Copyright © 2011-2013 Intel Corporation
* Copyright © 2015 Intel Corporation
* Daniel Vetter <daniel.vetter@ffwll.ch>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
* OTHER DEALINGS IN THE SOFTWARE.
*/
#ifndef __DRM_MODESET_HELPER_VTABLES_H__
#define __DRM_MODESET_HELPER_VTABLES_H__
#include <drm/drm_crtc.h>
/**
* 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.
*/
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.
*
* 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 {
/*
* Control power levels on the CRTC. If the mode passed in is
* unsupported, the provider must use the next lowest power level.
*/
void (*dpms)(struct drm_crtc *crtc, int mode);
void (*prepare)(struct drm_crtc *crtc);
void (*commit)(struct drm_crtc *crtc);
/* Provider can fixup or change mode timings before modeset occurs */
bool (*mode_fixup)(struct drm_crtc *crtc,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
/* Actually set the mode */
int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode, int x, int y,
struct drm_framebuffer *old_fb);
/* Actually set the mode for atomic helpers, optional */
void (*mode_set_nofb)(struct drm_crtc *crtc);
/* Move the crtc on the current fb to the given position *optional* */
int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
struct drm_framebuffer *old_fb);
int (*mode_set_base_atomic)(struct drm_crtc *crtc,
struct drm_framebuffer *fb, int x, int y,
enum mode_set_atomic);
/* reload the current crtc LUT */
void (*load_lut)(struct drm_crtc *crtc);
void (*disable)(struct drm_crtc *crtc);
void (*enable)(struct drm_crtc *crtc);
/* atomic helpers */
int (*atomic_check)(struct drm_crtc *crtc,
struct drm_crtc_state *state);
void (*atomic_begin)(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state);
void (*atomic_flush)(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state);
};
/**
* drm_crtc_helper_add - sets the helper vtable for a crtc
* @crtc: DRM CRTC
* @funcs: helper vtable to set for @crtc
*/
static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
const struct drm_crtc_helper_funcs *funcs)
{
crtc->helper_private = funcs;
}
/**
* struct drm_encoder_helper_funcs - helper operations for encoders
* @dpms: set power 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.
*
* 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);
bool (*mode_fixup)(struct drm_encoder *encoder,
const struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
void (*prepare)(struct drm_encoder *encoder);
void (*commit)(struct drm_encoder *encoder);
void (*mode_set)(struct drm_encoder *encoder,
struct drm_display_mode *mode,
struct drm_display_mode *adjusted_mode);
struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
/* detect for DAC style encoders */
enum drm_connector_status (*detect)(struct drm_encoder *encoder,
struct drm_connector *connector);
void (*disable)(struct drm_encoder *encoder);
void (*enable)(struct drm_encoder *encoder);
/* atomic helpers */
int (*atomic_check)(struct drm_encoder *encoder,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state);
};
/**
* drm_encoder_helper_add - sets the helper vtable for a encoder
* @encoder: DRM encoder
* @funcs: helper vtable to set for @encoder
*/
static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
const struct drm_encoder_helper_funcs *funcs)
{
encoder->helper_private = funcs;
}
/**
* struct drm_connector_helper_funcs - helper operations for connectors
* @get_modes: get mode list for this connector
* @mode_valid: is this mode valid on the given connector? (optional)
* @best_encoder: return the preferred encoder for this connector
* @atomic_best_encoder: atomic version of @best_encoder
*
* The helper operations are called by the mid-layer CRTC helper.
*/
struct drm_connector_helper_funcs {
int (*get_modes)(struct drm_connector *connector);
enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
struct drm_display_mode *mode);
struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
struct drm_encoder *(*atomic_best_encoder)(struct drm_connector *connector,
struct drm_connector_state *connector_state);
};
/**
* drm_connector_helper_add - sets the helper vtable for a connector
* @connector: DRM connector
* @funcs: helper vtable to set for @connector
*/
static inline void drm_connector_helper_add(struct drm_connector *connector,
const struct drm_connector_helper_funcs *funcs)
{
connector->helper_private = funcs;
}
/**
* struct drm_plane_helper_funcs - helper operations for CRTCs
* @prepare_fb: prepare a framebuffer for use by the plane
* @cleanup_fb: cleanup a framebuffer when it's no longer used by the plane
* @atomic_check: check that a given atomic state is valid and can be applied
* @atomic_update: apply an atomic state to the plane (mandatory)
* @atomic_disable: disable the plane
*
* The helper operations are called by the mid-layer CRTC helper.
*/
struct drm_plane_helper_funcs {
int (*prepare_fb)(struct drm_plane *plane,
const struct drm_plane_state *new_state);
void (*cleanup_fb)(struct drm_plane *plane,
const struct drm_plane_state *old_state);
int (*atomic_check)(struct drm_plane *plane,
struct drm_plane_state *state);
void (*atomic_update)(struct drm_plane *plane,
struct drm_plane_state *old_state);
void (*atomic_disable)(struct drm_plane *plane,
struct drm_plane_state *old_state);
};
/**
* drm_plane_helper_add - sets the helper vtable for a plane
* @plane: DRM plane
* @funcs: helper vtable to set for @plane
*/
static inline void drm_plane_helper_add(struct drm_plane *plane,
const struct drm_plane_helper_funcs *funcs)
{
plane->helper_private = funcs;
}
#endif
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