3e26909b0a
During resume, DP uses AUX to perform various functionalities like DPCD/EDID read or link training etc. This involves other hardware modules as well like USB and Charger. In a situation like continuous suspend/resume, while DP is processing resume, suspend can trigger resulting in dependent hardware modules to go to sleep. As AUX communication is hardware interrupt based, this can result in unstable system. Abort all functionalities before going to suspend to avoid unnecessary AUX and other functionality failures. Change-Id: Id52d408270232adf7258a7eb064ee969eba4be71 Signed-off-by: Sankeerth Billakanti <sbillaka@codeaurora.org> Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
64 lines
1.9 KiB
C
64 lines
1.9 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
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*/
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#ifndef _DP_AUX_H_
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#define _DP_AUX_H_
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#include "dp_catalog.h"
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#include "drm_dp_helper.h"
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#define DP_STATE_NOTIFICATION_SENT BIT(0)
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#define DP_STATE_TRAIN_1_STARTED BIT(1)
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#define DP_STATE_TRAIN_1_SUCCEEDED BIT(2)
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#define DP_STATE_TRAIN_1_FAILED BIT(3)
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#define DP_STATE_TRAIN_2_STARTED BIT(4)
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#define DP_STATE_TRAIN_2_SUCCEEDED BIT(5)
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#define DP_STATE_TRAIN_2_FAILED BIT(6)
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#define DP_STATE_CTRL_POWERED_ON BIT(7)
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#define DP_STATE_CTRL_POWERED_OFF BIT(8)
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#define DP_STATE_LINK_MAINTENANCE_STARTED BIT(9)
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#define DP_STATE_LINK_MAINTENANCE_COMPLETED BIT(10)
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#define DP_STATE_LINK_MAINTENANCE_FAILED BIT(11)
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#define DP_STATE_AUX_TIMEOUT BIT(12)
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#define DP_STATE_PLL_LOCKED BIT(13)
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enum dp_aux_error {
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DP_AUX_ERR_NONE = 0,
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DP_AUX_ERR_ADDR = -1,
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DP_AUX_ERR_TOUT = -2,
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DP_AUX_ERR_NACK = -3,
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DP_AUX_ERR_DEFER = -4,
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DP_AUX_ERR_NACK_DEFER = -5,
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DP_AUX_ERR_PHY = -6,
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};
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struct dp_aux {
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u32 reg;
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u32 size;
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u32 state;
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bool read;
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struct mutex *access_lock;
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struct drm_dp_aux *drm_aux;
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int (*drm_aux_register)(struct dp_aux *aux);
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void (*drm_aux_deregister)(struct dp_aux *aux);
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void (*isr)(struct dp_aux *aux);
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void (*init)(struct dp_aux *aux, struct dp_aux_cfg *aux_cfg);
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void (*deinit)(struct dp_aux *aux);
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void (*reconfig)(struct dp_aux *aux);
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void (*abort)(struct dp_aux *aux, bool abort);
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void (*dpcd_updated)(struct dp_aux *aux);
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void (*set_sim_mode)(struct dp_aux *aux, bool en, u8 *edid, u8 *dpcd);
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int (*aux_switch)(struct dp_aux *aux, bool enable, int orientation);
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};
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struct dp_aux *dp_aux_get(struct device *dev, struct dp_catalog_aux *catalog,
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struct dp_parser *parser, struct device_node *aux_switch);
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void dp_aux_put(struct dp_aux *aux);
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#endif /*__DP_AUX_H_*/
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