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c4d79c2201
This reverts commit54a07c7bb0, and reinstates the original. [airlied: this might be a bad plan for git]. commit3846fd9b86Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Wed Jan 11 10:01:17 2017 +0100 drm/probe-helpers: Drop locking from poll_enable It was only needed to protect the connector_list walking, see commit8c4ccc4ab6Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Thu Jul 9 23:44:26 2015 +0200 drm/probe-helper: Grab mode_config.mutex in poll_init/enable Unfortunately the commit message of that patch fails to mention that the new locking check was for the connector_list. But that requirement disappeared in commitc36a3254f7Author: Daniel Vetter <daniel.vetter@ffwll.ch> Date: Thu Dec 15 16:58:43 2016 +0100 drm: Convert all helpers to drm_connector_list_iter and so we can drop this again. This fixes a locking inversion on nouveau, where the rpm code needs to re-enable. But in other places the rpm_get() calls are nested within the big modeset locks. While at it, also improve the kerneldoc for these two functions a notch. v2: Update the kerneldoc even more to explain that these functions can't be called concurrently, or bad things happen (Chris).
78 lines
3.2 KiB
C
78 lines
3.2 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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#include <drm/drm_modeset_helper_vtables.h>
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#include <drm/drm_modeset_helper.h>
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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_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 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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