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3b8a684bd6
With legacy helpers all the routing was already set up when calling best_encoder and so could be inspected. But with atomic it's staged, hence we need a new atomic compliant callback for drivers which need to inspect the requested state and can't just decided the best encoder statically. This is needed to fix up i915 dp mst where we need to pick the right encoder depending upon the requested CRTC for the connector. v2: Don't forget to amend the kerneldoc Cc: Chris Wilson <chris@chris-wilson.co.uk> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Theodore Ts'o <tytso@mit.edu> Acked-by: Thierry Reding <treding@nvidia.com> Reviewed-by: Ander Conselvan de Oliveira <conselvan2@gmail.com> Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
243 lines
9.3 KiB
C
243 lines
9.3 KiB
C
/*
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* Copyright © 2006 Keith Packard
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* Copyright © 2007-2008 Dave Airlie
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* Copyright © 2007-2008 Intel Corporation
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* Jesse Barnes <jesse.barnes@intel.com>
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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/*
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* The DRM mode setting helper functions are common code for drivers to use if
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* they wish. Drivers are not forced to use this code in their
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* implementations but it would be useful if they code they do use at least
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* provides a consistent interface and operation to userspace
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*/
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#ifndef __DRM_CRTC_HELPER_H__
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#define __DRM_CRTC_HELPER_H__
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#include <linux/spinlock.h>
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#include <linux/types.h>
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#include <linux/idr.h>
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#include <linux/fb.h>
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#include <drm/drm_crtc.h>
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enum mode_set_atomic {
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LEAVE_ATOMIC_MODE_SET,
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ENTER_ATOMIC_MODE_SET,
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};
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/**
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* struct drm_crtc_helper_funcs - helper operations for CRTCs
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* @dpms: set power state
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* @prepare: prepare the CRTC, called before @mode_set
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* @commit: commit changes to CRTC, called after @mode_set
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* @mode_fixup: try to fixup proposed mode for this CRTC
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* @mode_set: set this mode
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* @mode_set_nofb: set mode only (no scanout buffer attached)
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* @mode_set_base: update the scanout buffer
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* @mode_set_base_atomic: non-blocking mode set (used for kgdb support)
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* @load_lut: load color palette
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* @disable: disable CRTC when no longer in use
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* @enable: enable CRTC
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* @atomic_check: check for validity of an atomic state
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* @atomic_begin: begin atomic update
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* @atomic_flush: flush atomic update
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*
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* The helper operations are called by the mid-layer CRTC helper.
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*
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* Note that with atomic helpers @dpms, @prepare and @commit hooks are
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* deprecated. Used @enable and @disable instead exclusively.
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*
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* With legacy crtc helpers there's a big semantic difference between @disable
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* and the other hooks: @disable also needs to release any resources acquired in
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* @mode_set (like shared PLLs).
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*/
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struct drm_crtc_helper_funcs {
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/*
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* Control power levels on the CRTC. If the mode passed in is
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* unsupported, the provider must use the next lowest power level.
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*/
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void (*dpms)(struct drm_crtc *crtc, int mode);
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void (*prepare)(struct drm_crtc *crtc);
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void (*commit)(struct drm_crtc *crtc);
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/* Provider can fixup or change mode timings before modeset occurs */
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bool (*mode_fixup)(struct drm_crtc *crtc,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode);
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/* Actually set the mode */
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int (*mode_set)(struct drm_crtc *crtc, struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode, int x, int y,
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struct drm_framebuffer *old_fb);
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/* Actually set the mode for atomic helpers, optional */
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void (*mode_set_nofb)(struct drm_crtc *crtc);
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/* Move the crtc on the current fb to the given position *optional* */
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int (*mode_set_base)(struct drm_crtc *crtc, int x, int y,
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struct drm_framebuffer *old_fb);
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int (*mode_set_base_atomic)(struct drm_crtc *crtc,
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struct drm_framebuffer *fb, int x, int y,
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enum mode_set_atomic);
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/* reload the current crtc LUT */
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void (*load_lut)(struct drm_crtc *crtc);
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void (*disable)(struct drm_crtc *crtc);
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void (*enable)(struct drm_crtc *crtc);
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/* atomic helpers */
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int (*atomic_check)(struct drm_crtc *crtc,
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struct drm_crtc_state *state);
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void (*atomic_begin)(struct drm_crtc *crtc);
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void (*atomic_flush)(struct drm_crtc *crtc);
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};
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/**
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* struct drm_encoder_helper_funcs - helper operations for encoders
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* @dpms: set power state
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* @save: save connector state
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* @restore: restore connector state
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* @mode_fixup: try to fixup proposed mode for this connector
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* @prepare: part of the disable sequence, called before the CRTC modeset
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* @commit: called after the CRTC modeset
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* @mode_set: set this mode, optional for atomic helpers
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* @get_crtc: return CRTC that the encoder is currently attached to
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* @detect: connection status detection
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* @disable: disable encoder when not in use (overrides DPMS off)
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* @enable: enable encoder
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* @atomic_check: check for validity of an atomic update
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*
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* The helper operations are called by the mid-layer CRTC helper.
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*
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* Note that with atomic helpers @dpms, @prepare and @commit hooks are
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* deprecated. Used @enable and @disable instead exclusively.
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*
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* With legacy crtc helpers there's a big semantic difference between @disable
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* and the other hooks: @disable also needs to release any resources acquired in
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* @mode_set (like shared PLLs).
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*/
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struct drm_encoder_helper_funcs {
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void (*dpms)(struct drm_encoder *encoder, int mode);
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void (*save)(struct drm_encoder *encoder);
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void (*restore)(struct drm_encoder *encoder);
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bool (*mode_fixup)(struct drm_encoder *encoder,
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const struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode);
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void (*prepare)(struct drm_encoder *encoder);
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void (*commit)(struct drm_encoder *encoder);
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void (*mode_set)(struct drm_encoder *encoder,
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struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode);
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struct drm_crtc *(*get_crtc)(struct drm_encoder *encoder);
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/* detect for DAC style encoders */
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enum drm_connector_status (*detect)(struct drm_encoder *encoder,
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struct drm_connector *connector);
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void (*disable)(struct drm_encoder *encoder);
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void (*enable)(struct drm_encoder *encoder);
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/* atomic helpers */
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int (*atomic_check)(struct drm_encoder *encoder,
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struct drm_crtc_state *crtc_state,
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struct drm_connector_state *conn_state);
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};
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/**
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* struct drm_connector_helper_funcs - helper operations for connectors
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* @get_modes: get mode list for this connector
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* @mode_valid: is this mode valid on the given connector? (optional)
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* @best_encoder: return the preferred encoder for this connector
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* @atomic_best_encoder: atomic version of @best_encoder
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*
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* The helper operations are called by the mid-layer CRTC helper.
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*/
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struct drm_connector_helper_funcs {
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int (*get_modes)(struct drm_connector *connector);
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enum drm_mode_status (*mode_valid)(struct drm_connector *connector,
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struct drm_display_mode *mode);
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struct drm_encoder *(*best_encoder)(struct drm_connector *connector);
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struct drm_encoder *(*atomic_best_encoder)(struct drm_connector *connector,
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struct drm_connector_state *connector_state);
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};
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extern void drm_helper_disable_unused_functions(struct drm_device *dev);
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extern int drm_crtc_helper_set_config(struct drm_mode_set *set);
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extern bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
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struct drm_display_mode *mode,
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int x, int y,
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struct drm_framebuffer *old_fb);
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extern bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
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extern bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
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extern void drm_helper_connector_dpms(struct drm_connector *connector, int mode);
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extern void drm_helper_move_panel_connectors_to_head(struct drm_device *);
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extern void drm_helper_mode_fill_fb_struct(struct drm_framebuffer *fb,
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struct drm_mode_fb_cmd2 *mode_cmd);
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static inline void drm_crtc_helper_add(struct drm_crtc *crtc,
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const struct drm_crtc_helper_funcs *funcs)
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{
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crtc->helper_private = funcs;
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}
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static inline void drm_encoder_helper_add(struct drm_encoder *encoder,
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const struct drm_encoder_helper_funcs *funcs)
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{
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encoder->helper_private = funcs;
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}
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static inline void drm_connector_helper_add(struct drm_connector *connector,
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const struct drm_connector_helper_funcs *funcs)
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{
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connector->helper_private = funcs;
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}
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extern void drm_helper_resume_force_mode(struct drm_device *dev);
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int drm_helper_crtc_mode_set(struct drm_crtc *crtc, struct drm_display_mode *mode,
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struct drm_display_mode *adjusted_mode, int x, int y,
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struct drm_framebuffer *old_fb);
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int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
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struct drm_framebuffer *old_fb);
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/* drm_probe_helper.c */
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extern int drm_helper_probe_single_connector_modes(struct drm_connector
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*connector, uint32_t maxX,
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uint32_t maxY);
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extern int drm_helper_probe_single_connector_modes_nomerge(struct drm_connector
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*connector,
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uint32_t maxX,
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uint32_t maxY);
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extern void drm_kms_helper_poll_init(struct drm_device *dev);
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extern void drm_kms_helper_poll_fini(struct drm_device *dev);
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extern bool drm_helper_hpd_irq_event(struct drm_device *dev);
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extern void drm_kms_helper_hotplug_event(struct drm_device *dev);
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extern void drm_kms_helper_poll_disable(struct drm_device *dev);
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extern void drm_kms_helper_poll_enable(struct drm_device *dev);
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#endif
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