2858bd9ed1
Add notification block chain support for suspend/resume events in DRM driver, which can be used by other kernel modules such as touch driver to get notified about display suspend/resume state transitions. Change-Id: Iec9c46363707b3fa8e09203eca95427c95f81c7c Signed-off-by: Yuan Zhao <yzhao@codeaurora.org>
46 lines
1.2 KiB
C
46 lines
1.2 KiB
C
/*
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* Copyright (c) 2017, The Linux Foundation. All rights reserved.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 and
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* only version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#ifndef _MSM_DRM_NOTIFY_H_
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#define _MSM_DRM_NOTIFY_H_
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#include <linux/notifier.h>
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/* A hardware display blank change occurred */
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#define MSM_DRM_EVENT_BLANK 0x01
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/* A hardware display blank early change occurred */
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#define MSM_DRM_EARLY_EVENT_BLANK 0x02
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enum {
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/* panel: power on */
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MSM_DRM_BLANK_UNBLANK,
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/* panel: power off */
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MSM_DRM_BLANK_POWERDOWN,
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};
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enum msm_drm_display_id {
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/* primary display */
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MSM_DRM_PRIMARY_DISPLAY,
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/* external display */
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MSM_DRM_EXTERNAL_DISPLAY,
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MSM_DRM_DISPLAY_MAX
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};
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struct msm_drm_notifier {
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enum msm_drm_display_id id;
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void *data;
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};
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int msm_drm_register_client(struct notifier_block *nb);
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int msm_drm_unregister_client(struct notifier_block *nb);
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#endif
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