6c5ed5ae35
mode_valid() called from drm_helper_probe_single_connector_modes() may need to look at connector->state because what a valid mode is may depend on connector properties being set. For example some HDMI modes might be rejected when a connector property forces the connector into DVI mode. Some implementations of detect() already lock all state, so we have to pass an acquire_ctx to them to prevent a deadlock. This means changing the function signature of detect() slightly, and passing the acquire_ctx for locking multiple crtc's. For the callbacks, it will always be non-zero. To allow callers not to worry about this, drm_helper_probe_detect_ctx is added which might handle -EDEADLK for you. Changes since v1: - Always set ctx parameter. Changes since v2: - Always take connection_mutex when probing. Changes since v3: - Remove the ctx from intel_dp_long_pulse, and add WARN_ON(!connection_mutex) (danvet) - Update docs to clarify the locking situation. (danvet) Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com> Cc: Boris Brezillon <boris.brezillon@free-electrons.com> Reviewed-by: Daniel Vetter <daniel.vetter@ffwll.ch> Link: http://patchwork.freedesktop.org/patch/msgid/1491504920-4017-1-git-send-email-maarten.lankhorst@linux.intel.com
82 lines
3.2 KiB
C
82 lines
3.2 KiB
C
/*
|
|
* Copyright © 2006 Keith Packard
|
|
* Copyright © 2007-2008 Dave Airlie
|
|
* Copyright © 2007-2008 Intel Corporation
|
|
* Jesse Barnes <jesse.barnes@intel.com>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/*
|
|
* 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 they code they do use at least
|
|
* provides a consistent interface and operation to userspace
|
|
*/
|
|
|
|
#ifndef __DRM_CRTC_HELPER_H__
|
|
#define __DRM_CRTC_HELPER_H__
|
|
|
|
#include <linux/spinlock.h>
|
|
#include <linux/types.h>
|
|
#include <linux/idr.h>
|
|
|
|
#include <linux/fb.h>
|
|
|
|
#include <drm/drm_crtc.h>
|
|
#include <drm/drm_modeset_helper_vtables.h>
|
|
#include <drm/drm_modeset_helper.h>
|
|
|
|
void drm_helper_disable_unused_functions(struct drm_device *dev);
|
|
int drm_crtc_helper_set_config(struct drm_mode_set *set,
|
|
struct drm_modeset_acquire_ctx *ctx);
|
|
bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
|
|
struct drm_display_mode *mode,
|
|
int x, int y,
|
|
struct drm_framebuffer *old_fb);
|
|
bool drm_helper_crtc_in_use(struct drm_crtc *crtc);
|
|
bool drm_helper_encoder_in_use(struct drm_encoder *encoder);
|
|
|
|
int drm_helper_connector_dpms(struct drm_connector *connector, int mode);
|
|
|
|
void drm_helper_resume_force_mode(struct drm_device *dev);
|
|
|
|
int drm_helper_crtc_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);
|
|
int drm_helper_crtc_mode_set_base(struct drm_crtc *crtc, int x, int y,
|
|
struct drm_framebuffer *old_fb);
|
|
|
|
/* drm_probe_helper.c */
|
|
int drm_helper_probe_single_connector_modes(struct drm_connector
|
|
*connector, uint32_t maxX,
|
|
uint32_t maxY);
|
|
int drm_helper_probe_detect(struct drm_connector *connector,
|
|
struct drm_modeset_acquire_ctx *ctx,
|
|
bool force);
|
|
void drm_kms_helper_poll_init(struct drm_device *dev);
|
|
void drm_kms_helper_poll_fini(struct drm_device *dev);
|
|
bool drm_helper_hpd_irq_event(struct drm_device *dev);
|
|
void drm_kms_helper_hotplug_event(struct drm_device *dev);
|
|
|
|
void drm_kms_helper_poll_disable(struct drm_device *dev);
|
|
void drm_kms_helper_poll_enable(struct drm_device *dev);
|
|
|
|
#endif
|