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4ad640e99e
drm_kms_helper_poll_enable() was converted to lock the mode_config
mutex in commit 8c4ccc4ab6
("drm/probe-helper: Grab mode_config.mutex in poll_init/enable").
This disregarded the cases where this function is called from a context
where this mutex is already locked.
Add a non-locking version as well.
Changes since v1:
- use function name suffix '_locked' for the function that
is to be called from a locked context.
Signed-off-by: Egbert Eich <eich@suse.de>
Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
246 lines
9.4 KiB
C
246 lines
9.4 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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struct drm_crtc_state *old_crtc_state);
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void (*atomic_flush)(struct drm_crtc *crtc,
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struct drm_crtc_state *old_crtc_state);
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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 int 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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extern void drm_kms_helper_poll_enable_locked(struct drm_device *dev);
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#endif
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