1771 lines
44 KiB
C
1771 lines
44 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2017-2020, The Linux Foundation. All rights reserved.
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*/
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/uaccess.h>
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#include <linux/debugfs.h>
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#include <linux/component.h>
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#include <linux/of_irq.h>
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#include <linux/delay.h>
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#include <drm/display/drm_dp_aux_bus.h>
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#include "msm_drv.h"
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#include "msm_kms.h"
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#include "dp_parser.h"
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#include "dp_power.h"
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#include "dp_catalog.h"
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#include "dp_aux.h"
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#include "dp_reg.h"
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#include "dp_link.h"
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#include "dp_panel.h"
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#include "dp_ctrl.h"
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#include "dp_display.h"
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#include "dp_drm.h"
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#include "dp_audio.h"
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#include "dp_debug.h"
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static bool psr_enabled = false;
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module_param(psr_enabled, bool, 0);
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MODULE_PARM_DESC(psr_enabled, "enable PSR for eDP and DP displays");
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#define HPD_STRING_SIZE 30
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enum {
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ISR_DISCONNECTED,
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ISR_CONNECT_PENDING,
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ISR_CONNECTED,
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ISR_HPD_REPLUG_COUNT,
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ISR_IRQ_HPD_PULSE_COUNT,
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ISR_HPD_LO_GLITH_COUNT,
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};
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/* event thread connection state */
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enum {
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ST_DISCONNECTED,
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ST_MAINLINK_READY,
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ST_CONNECTED,
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ST_DISCONNECT_PENDING,
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ST_DISPLAY_OFF,
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ST_SUSPENDED,
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};
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enum {
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EV_NO_EVENT,
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/* hpd events */
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EV_HPD_INIT_SETUP,
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EV_HPD_PLUG_INT,
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EV_IRQ_HPD_INT,
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EV_HPD_UNPLUG_INT,
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EV_USER_NOTIFICATION,
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};
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#define EVENT_TIMEOUT (HZ/10) /* 100ms */
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#define DP_EVENT_Q_MAX 8
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#define DP_TIMEOUT_NONE 0
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#define WAIT_FOR_RESUME_TIMEOUT_JIFFIES (HZ / 2)
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struct dp_event {
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u32 event_id;
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u32 data;
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u32 delay;
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};
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struct dp_display_private {
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char *name;
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int irq;
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unsigned int id;
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/* state variables */
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bool core_initialized;
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bool phy_initialized;
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bool hpd_irq_on;
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bool audio_supported;
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struct drm_device *drm_dev;
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struct platform_device *pdev;
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struct dentry *root;
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struct dp_parser *parser;
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struct dp_power *power;
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struct dp_catalog *catalog;
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struct drm_dp_aux *aux;
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struct dp_link *link;
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struct dp_panel *panel;
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struct dp_ctrl *ctrl;
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struct dp_debug *debug;
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struct dp_display_mode dp_mode;
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struct msm_dp dp_display;
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/* wait for audio signaling */
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struct completion audio_comp;
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/* event related only access by event thread */
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struct mutex event_mutex;
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wait_queue_head_t event_q;
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u32 hpd_state;
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u32 event_pndx;
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u32 event_gndx;
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struct task_struct *ev_tsk;
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struct dp_event event_list[DP_EVENT_Q_MAX];
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spinlock_t event_lock;
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bool wide_bus_en;
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struct dp_audio *audio;
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};
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struct msm_dp_desc {
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phys_addr_t io_start;
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unsigned int id;
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unsigned int connector_type;
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bool wide_bus_en;
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};
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static const struct msm_dp_desc sc7180_dp_descs[] = {
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{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
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{}
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};
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static const struct msm_dp_desc sc7280_dp_descs[] = {
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{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
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{}
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};
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static const struct msm_dp_desc sc8180x_dp_descs[] = {
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{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
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{ .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
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{ .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP },
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{}
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};
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static const struct msm_dp_desc sc8280xp_dp_descs[] = {
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{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x0ae98000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x22090000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x22098000, .id = MSM_DP_CONTROLLER_1, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{ .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_DisplayPort, .wide_bus_en = true },
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{}
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};
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static const struct msm_dp_desc sc8280xp_edp_descs[] = {
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{ .io_start = 0x0ae9a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
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{ .io_start = 0x0aea0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
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{ .io_start = 0x2209a000, .id = MSM_DP_CONTROLLER_2, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
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{ .io_start = 0x220a0000, .id = MSM_DP_CONTROLLER_3, .connector_type = DRM_MODE_CONNECTOR_eDP, .wide_bus_en = true },
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{}
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};
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static const struct msm_dp_desc sm8350_dp_descs[] = {
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{ .io_start = 0x0ae90000, .id = MSM_DP_CONTROLLER_0, .connector_type = DRM_MODE_CONNECTOR_DisplayPort },
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{}
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};
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static const struct of_device_id dp_dt_match[] = {
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{ .compatible = "qcom,sc7180-dp", .data = &sc7180_dp_descs },
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{ .compatible = "qcom,sc7280-dp", .data = &sc7280_dp_descs },
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{ .compatible = "qcom,sc7280-edp", .data = &sc7280_dp_descs },
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{ .compatible = "qcom,sc8180x-dp", .data = &sc8180x_dp_descs },
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{ .compatible = "qcom,sc8180x-edp", .data = &sc8180x_dp_descs },
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{ .compatible = "qcom,sc8280xp-dp", .data = &sc8280xp_dp_descs },
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{ .compatible = "qcom,sc8280xp-edp", .data = &sc8280xp_edp_descs },
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{ .compatible = "qcom,sdm845-dp", .data = &sc7180_dp_descs },
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{ .compatible = "qcom,sm8350-dp", .data = &sm8350_dp_descs },
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{}
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};
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static struct dp_display_private *dev_get_dp_display_private(struct device *dev)
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{
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struct msm_dp *dp = dev_get_drvdata(dev);
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return container_of(dp, struct dp_display_private, dp_display);
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}
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static int dp_add_event(struct dp_display_private *dp_priv, u32 event,
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u32 data, u32 delay)
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{
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unsigned long flag;
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struct dp_event *todo;
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int pndx;
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spin_lock_irqsave(&dp_priv->event_lock, flag);
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pndx = dp_priv->event_pndx + 1;
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pndx %= DP_EVENT_Q_MAX;
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if (pndx == dp_priv->event_gndx) {
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pr_err("event_q is full: pndx=%d gndx=%d\n",
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dp_priv->event_pndx, dp_priv->event_gndx);
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spin_unlock_irqrestore(&dp_priv->event_lock, flag);
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return -EPERM;
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}
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todo = &dp_priv->event_list[dp_priv->event_pndx++];
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dp_priv->event_pndx %= DP_EVENT_Q_MAX;
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todo->event_id = event;
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todo->data = data;
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todo->delay = delay;
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wake_up(&dp_priv->event_q);
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spin_unlock_irqrestore(&dp_priv->event_lock, flag);
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return 0;
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}
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static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
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{
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unsigned long flag;
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struct dp_event *todo;
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u32 gndx;
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spin_lock_irqsave(&dp_priv->event_lock, flag);
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if (dp_priv->event_pndx == dp_priv->event_gndx) {
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spin_unlock_irqrestore(&dp_priv->event_lock, flag);
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return -ENOENT;
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}
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gndx = dp_priv->event_gndx;
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while (dp_priv->event_pndx != gndx) {
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todo = &dp_priv->event_list[gndx];
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if (todo->event_id == event) {
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todo->event_id = EV_NO_EVENT; /* deleted */
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todo->delay = 0;
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}
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gndx++;
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gndx %= DP_EVENT_Q_MAX;
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}
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spin_unlock_irqrestore(&dp_priv->event_lock, flag);
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return 0;
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}
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void dp_display_signal_audio_start(struct msm_dp *dp_display)
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{
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struct dp_display_private *dp;
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dp = container_of(dp_display, struct dp_display_private, dp_display);
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reinit_completion(&dp->audio_comp);
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}
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void dp_display_signal_audio_complete(struct msm_dp *dp_display)
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{
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struct dp_display_private *dp;
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dp = container_of(dp_display, struct dp_display_private, dp_display);
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complete_all(&dp->audio_comp);
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}
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static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv);
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static int dp_display_bind(struct device *dev, struct device *master,
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void *data)
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{
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int rc = 0;
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struct dp_display_private *dp = dev_get_dp_display_private(dev);
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struct msm_drm_private *priv = dev_get_drvdata(master);
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struct drm_device *drm = priv->dev;
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dp->dp_display.drm_dev = drm;
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priv->dp[dp->id] = &dp->dp_display;
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rc = dp->parser->parse(dp->parser);
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if (rc) {
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DRM_ERROR("device tree parsing failed\n");
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goto end;
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}
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dp->drm_dev = drm;
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dp->aux->drm_dev = drm;
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rc = dp_aux_register(dp->aux);
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if (rc) {
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DRM_ERROR("DRM DP AUX register failed\n");
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goto end;
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}
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rc = dp_power_client_init(dp->power);
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if (rc) {
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DRM_ERROR("Power client create failed\n");
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goto end;
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}
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rc = dp_register_audio_driver(dev, dp->audio);
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if (rc) {
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DRM_ERROR("Audio registration Dp failed\n");
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goto end;
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}
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rc = dp_hpd_event_thread_start(dp);
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if (rc) {
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DRM_ERROR("Event thread create failed\n");
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goto end;
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}
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return 0;
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end:
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return rc;
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}
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static void dp_display_unbind(struct device *dev, struct device *master,
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void *data)
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{
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struct dp_display_private *dp = dev_get_dp_display_private(dev);
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struct msm_drm_private *priv = dev_get_drvdata(master);
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/* disable all HPD interrupts */
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if (dp->core_initialized)
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dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
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kthread_stop(dp->ev_tsk);
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of_dp_aux_depopulate_bus(dp->aux);
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dp_power_client_deinit(dp->power);
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dp_unregister_audio_driver(dev, dp->audio);
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dp_aux_unregister(dp->aux);
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dp->drm_dev = NULL;
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dp->aux->drm_dev = NULL;
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priv->dp[dp->id] = NULL;
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}
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static const struct component_ops dp_display_comp_ops = {
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.bind = dp_display_bind,
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.unbind = dp_display_unbind,
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};
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static bool dp_display_is_ds_bridge(struct dp_panel *panel)
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{
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return (panel->dpcd[DP_DOWNSTREAMPORT_PRESENT] &
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DP_DWN_STRM_PORT_PRESENT);
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}
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static bool dp_display_is_sink_count_zero(struct dp_display_private *dp)
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{
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drm_dbg_dp(dp->drm_dev, "present=%#x sink_count=%d\n",
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dp->panel->dpcd[DP_DOWNSTREAMPORT_PRESENT],
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dp->link->sink_count);
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return dp_display_is_ds_bridge(dp->panel) &&
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(dp->link->sink_count == 0);
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}
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static void dp_display_send_hpd_event(struct msm_dp *dp_display)
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{
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struct dp_display_private *dp;
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struct drm_connector *connector;
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dp = container_of(dp_display, struct dp_display_private, dp_display);
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connector = dp->dp_display.connector;
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drm_helper_hpd_irq_event(connector->dev);
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}
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static int dp_display_send_hpd_notification(struct dp_display_private *dp,
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bool hpd)
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{
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if ((hpd && dp->dp_display.is_connected) ||
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(!hpd && !dp->dp_display.is_connected)) {
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drm_dbg_dp(dp->drm_dev, "HPD already %s\n",
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(hpd ? "on" : "off"));
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return 0;
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}
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/* reset video pattern flag on disconnect */
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if (!hpd)
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dp->panel->video_test = false;
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dp->dp_display.is_connected = hpd;
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drm_dbg_dp(dp->drm_dev, "type=%d hpd=%d\n",
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dp->dp_display.connector_type, hpd);
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dp_display_send_hpd_event(&dp->dp_display);
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return 0;
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}
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static int dp_display_process_hpd_high(struct dp_display_private *dp)
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{
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int rc = 0;
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struct edid *edid;
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dp->panel->max_dp_lanes = dp->parser->max_dp_lanes;
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dp->panel->max_dp_link_rate = dp->parser->max_dp_link_rate;
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drm_dbg_dp(dp->drm_dev, "max_lanes=%d max_link_rate=%d\n",
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dp->panel->max_dp_lanes, dp->panel->max_dp_link_rate);
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rc = dp_panel_read_sink_caps(dp->panel, dp->dp_display.connector);
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if (rc)
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goto end;
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dp_link_process_request(dp->link);
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edid = dp->panel->edid;
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dp->dp_display.psr_supported = dp->panel->psr_cap.version && psr_enabled;
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dp->audio_supported = drm_detect_monitor_audio(edid);
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dp_panel_handle_sink_request(dp->panel);
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dp->dp_display.max_dp_lanes = dp->parser->max_dp_lanes;
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/*
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* set sink to normal operation mode -- D0
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* before dpcd read
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*/
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dp_link_psm_config(dp->link, &dp->panel->link_info, false);
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dp_link_reset_phy_params_vx_px(dp->link);
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rc = dp_ctrl_on_link(dp->ctrl);
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if (rc) {
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DRM_ERROR("failed to complete DP link training\n");
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goto end;
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}
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dp_add_event(dp, EV_USER_NOTIFICATION, true, 0);
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end:
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return rc;
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}
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static void dp_display_host_phy_init(struct dp_display_private *dp)
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{
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drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
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dp->dp_display.connector_type, dp->core_initialized,
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dp->phy_initialized);
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if (!dp->phy_initialized) {
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dp_ctrl_phy_init(dp->ctrl);
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dp->phy_initialized = true;
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}
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}
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static void dp_display_host_phy_exit(struct dp_display_private *dp)
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{
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drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
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dp->dp_display.connector_type, dp->core_initialized,
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dp->phy_initialized);
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if (dp->phy_initialized) {
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dp_ctrl_phy_exit(dp->ctrl);
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dp->phy_initialized = false;
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}
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}
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static void dp_display_host_init(struct dp_display_private *dp)
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{
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drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
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dp->dp_display.connector_type, dp->core_initialized,
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dp->phy_initialized);
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dp_power_init(dp->power);
|
|
dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
|
|
dp_aux_init(dp->aux);
|
|
dp->core_initialized = true;
|
|
}
|
|
|
|
static void dp_display_host_deinit(struct dp_display_private *dp)
|
|
{
|
|
drm_dbg_dp(dp->drm_dev, "type=%d core_init=%d phy_init=%d\n",
|
|
dp->dp_display.connector_type, dp->core_initialized,
|
|
dp->phy_initialized);
|
|
|
|
dp_ctrl_reset_irq_ctrl(dp->ctrl, false);
|
|
dp_aux_deinit(dp->aux);
|
|
dp_power_deinit(dp->power);
|
|
dp->core_initialized = false;
|
|
}
|
|
|
|
static int dp_display_usbpd_configure_cb(struct device *dev)
|
|
{
|
|
struct dp_display_private *dp = dev_get_dp_display_private(dev);
|
|
|
|
dp_display_host_phy_init(dp);
|
|
|
|
return dp_display_process_hpd_high(dp);
|
|
}
|
|
|
|
static int dp_display_notify_disconnect(struct device *dev)
|
|
{
|
|
struct dp_display_private *dp = dev_get_dp_display_private(dev);
|
|
|
|
dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dp_display_handle_video_request(struct dp_display_private *dp)
|
|
{
|
|
if (dp->link->sink_request & DP_TEST_LINK_VIDEO_PATTERN) {
|
|
dp->panel->video_test = true;
|
|
dp_link_send_test_response(dp->link);
|
|
}
|
|
}
|
|
|
|
static int dp_display_handle_port_ststus_changed(struct dp_display_private *dp)
|
|
{
|
|
int rc = 0;
|
|
|
|
if (dp_display_is_sink_count_zero(dp)) {
|
|
drm_dbg_dp(dp->drm_dev, "sink count is zero, nothing to do\n");
|
|
if (dp->hpd_state != ST_DISCONNECTED) {
|
|
dp->hpd_state = ST_DISCONNECT_PENDING;
|
|
dp_add_event(dp, EV_USER_NOTIFICATION, false, 0);
|
|
}
|
|
} else {
|
|
if (dp->hpd_state == ST_DISCONNECTED) {
|
|
dp->hpd_state = ST_MAINLINK_READY;
|
|
rc = dp_display_process_hpd_high(dp);
|
|
if (rc)
|
|
dp->hpd_state = ST_DISCONNECTED;
|
|
}
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int dp_display_handle_irq_hpd(struct dp_display_private *dp)
|
|
{
|
|
u32 sink_request = dp->link->sink_request;
|
|
|
|
drm_dbg_dp(dp->drm_dev, "%d\n", sink_request);
|
|
if (dp->hpd_state == ST_DISCONNECTED) {
|
|
if (sink_request & DP_LINK_STATUS_UPDATED) {
|
|
drm_dbg_dp(dp->drm_dev, "Disconnected sink_request: %d\n",
|
|
sink_request);
|
|
DRM_ERROR("Disconnected, no DP_LINK_STATUS_UPDATED\n");
|
|
return -EINVAL;
|
|
}
|
|
}
|
|
|
|
dp_ctrl_handle_sink_request(dp->ctrl);
|
|
|
|
if (sink_request & DP_TEST_LINK_VIDEO_PATTERN)
|
|
dp_display_handle_video_request(dp);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dp_display_usbpd_attention_cb(struct device *dev)
|
|
{
|
|
int rc = 0;
|
|
u32 sink_request;
|
|
struct dp_display_private *dp = dev_get_dp_display_private(dev);
|
|
|
|
/* check for any test request issued by sink */
|
|
rc = dp_link_process_request(dp->link);
|
|
if (!rc) {
|
|
sink_request = dp->link->sink_request;
|
|
drm_dbg_dp(dp->drm_dev, "hpd_state=%d sink_request=%d\n",
|
|
dp->hpd_state, sink_request);
|
|
if (sink_request & DS_PORT_STATUS_CHANGED)
|
|
rc = dp_display_handle_port_ststus_changed(dp);
|
|
else
|
|
rc = dp_display_handle_irq_hpd(dp);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
|
|
{
|
|
u32 state;
|
|
int ret;
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
|
|
state = dp->hpd_state;
|
|
drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
|
|
dp->dp_display.connector_type, state);
|
|
|
|
if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
if (state == ST_MAINLINK_READY || state == ST_CONNECTED) {
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
if (state == ST_DISCONNECT_PENDING) {
|
|
/* wait until ST_DISCONNECTED */
|
|
dp_add_event(dp, EV_HPD_PLUG_INT, 0, 1); /* delay = 1 */
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
ret = dp_display_usbpd_configure_cb(&dp->pdev->dev);
|
|
if (ret) { /* link train failed */
|
|
dp->hpd_state = ST_DISCONNECTED;
|
|
} else {
|
|
dp->hpd_state = ST_MAINLINK_READY;
|
|
}
|
|
|
|
drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
|
|
dp->dp_display.connector_type, state);
|
|
mutex_unlock(&dp->event_mutex);
|
|
|
|
/* uevent will complete connection part */
|
|
return 0;
|
|
};
|
|
|
|
static void dp_display_handle_plugged_change(struct msm_dp *dp_display,
|
|
bool plugged)
|
|
{
|
|
struct dp_display_private *dp;
|
|
|
|
dp = container_of(dp_display,
|
|
struct dp_display_private, dp_display);
|
|
|
|
/* notify audio subsystem only if sink supports audio */
|
|
if (dp_display->plugged_cb && dp_display->codec_dev &&
|
|
dp->audio_supported)
|
|
dp_display->plugged_cb(dp_display->codec_dev, plugged);
|
|
}
|
|
|
|
static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
|
|
{
|
|
u32 state;
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
|
|
state = dp->hpd_state;
|
|
|
|
drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
|
|
dp->dp_display.connector_type, state);
|
|
|
|
/* unplugged, no more irq_hpd handle */
|
|
dp_del_event(dp, EV_IRQ_HPD_INT);
|
|
|
|
if (state == ST_DISCONNECTED) {
|
|
/* triggered by irq_hdp with sink_count = 0 */
|
|
if (dp->link->sink_count == 0) {
|
|
dp_display_host_phy_exit(dp);
|
|
}
|
|
dp_display_notify_disconnect(&dp->pdev->dev);
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
} else if (state == ST_DISCONNECT_PENDING) {
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
} else if (state == ST_MAINLINK_READY) {
|
|
dp_ctrl_off_link(dp->ctrl);
|
|
dp_display_host_phy_exit(dp);
|
|
dp->hpd_state = ST_DISCONNECTED;
|
|
dp_display_notify_disconnect(&dp->pdev->dev);
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* We don't need separate work for disconnect as
|
|
* connect/attention interrupts are disabled
|
|
*/
|
|
dp_display_notify_disconnect(&dp->pdev->dev);
|
|
|
|
if (state == ST_DISPLAY_OFF) {
|
|
dp->hpd_state = ST_DISCONNECTED;
|
|
} else {
|
|
dp->hpd_state = ST_DISCONNECT_PENDING;
|
|
}
|
|
|
|
/* signal the disconnect event early to ensure proper teardown */
|
|
dp_display_handle_plugged_change(&dp->dp_display, false);
|
|
|
|
drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
|
|
dp->dp_display.connector_type, state);
|
|
|
|
/* uevent will complete disconnection part */
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
static int dp_irq_hpd_handle(struct dp_display_private *dp, u32 data)
|
|
{
|
|
u32 state;
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
|
|
/* irq_hpd can happen at either connected or disconnected state */
|
|
state = dp->hpd_state;
|
|
drm_dbg_dp(dp->drm_dev, "Before, type=%d hpd_state=%d\n",
|
|
dp->dp_display.connector_type, state);
|
|
|
|
if (state == ST_DISPLAY_OFF || state == ST_SUSPENDED) {
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
if (state == ST_MAINLINK_READY || state == ST_DISCONNECT_PENDING) {
|
|
/* wait until ST_CONNECTED */
|
|
dp_add_event(dp, EV_IRQ_HPD_INT, 0, 1); /* delay = 1 */
|
|
mutex_unlock(&dp->event_mutex);
|
|
return 0;
|
|
}
|
|
|
|
dp_display_usbpd_attention_cb(&dp->pdev->dev);
|
|
|
|
drm_dbg_dp(dp->drm_dev, "After, type=%d hpd_state=%d\n",
|
|
dp->dp_display.connector_type, state);
|
|
|
|
mutex_unlock(&dp->event_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void dp_display_deinit_sub_modules(struct dp_display_private *dp)
|
|
{
|
|
dp_debug_put(dp->debug);
|
|
dp_audio_put(dp->audio);
|
|
dp_panel_put(dp->panel);
|
|
dp_aux_put(dp->aux);
|
|
}
|
|
|
|
static int dp_init_sub_modules(struct dp_display_private *dp)
|
|
{
|
|
int rc = 0;
|
|
struct device *dev = &dp->pdev->dev;
|
|
struct dp_panel_in panel_in = {
|
|
.dev = dev,
|
|
};
|
|
|
|
dp->parser = dp_parser_get(dp->pdev);
|
|
if (IS_ERR(dp->parser)) {
|
|
rc = PTR_ERR(dp->parser);
|
|
DRM_ERROR("failed to initialize parser, rc = %d\n", rc);
|
|
dp->parser = NULL;
|
|
goto error;
|
|
}
|
|
|
|
dp->catalog = dp_catalog_get(dev, &dp->parser->io);
|
|
if (IS_ERR(dp->catalog)) {
|
|
rc = PTR_ERR(dp->catalog);
|
|
DRM_ERROR("failed to initialize catalog, rc = %d\n", rc);
|
|
dp->catalog = NULL;
|
|
goto error;
|
|
}
|
|
|
|
dp->power = dp_power_get(dev, dp->parser);
|
|
if (IS_ERR(dp->power)) {
|
|
rc = PTR_ERR(dp->power);
|
|
DRM_ERROR("failed to initialize power, rc = %d\n", rc);
|
|
dp->power = NULL;
|
|
goto error;
|
|
}
|
|
|
|
dp->aux = dp_aux_get(dev, dp->catalog, dp->dp_display.is_edp);
|
|
if (IS_ERR(dp->aux)) {
|
|
rc = PTR_ERR(dp->aux);
|
|
DRM_ERROR("failed to initialize aux, rc = %d\n", rc);
|
|
dp->aux = NULL;
|
|
goto error;
|
|
}
|
|
|
|
dp->link = dp_link_get(dev, dp->aux);
|
|
if (IS_ERR(dp->link)) {
|
|
rc = PTR_ERR(dp->link);
|
|
DRM_ERROR("failed to initialize link, rc = %d\n", rc);
|
|
dp->link = NULL;
|
|
goto error_link;
|
|
}
|
|
|
|
panel_in.aux = dp->aux;
|
|
panel_in.catalog = dp->catalog;
|
|
panel_in.link = dp->link;
|
|
|
|
dp->panel = dp_panel_get(&panel_in);
|
|
if (IS_ERR(dp->panel)) {
|
|
rc = PTR_ERR(dp->panel);
|
|
DRM_ERROR("failed to initialize panel, rc = %d\n", rc);
|
|
dp->panel = NULL;
|
|
goto error_link;
|
|
}
|
|
|
|
dp->ctrl = dp_ctrl_get(dev, dp->link, dp->panel, dp->aux,
|
|
dp->power, dp->catalog, dp->parser);
|
|
if (IS_ERR(dp->ctrl)) {
|
|
rc = PTR_ERR(dp->ctrl);
|
|
DRM_ERROR("failed to initialize ctrl, rc = %d\n", rc);
|
|
dp->ctrl = NULL;
|
|
goto error_ctrl;
|
|
}
|
|
|
|
dp->audio = dp_audio_get(dp->pdev, dp->panel, dp->catalog);
|
|
if (IS_ERR(dp->audio)) {
|
|
rc = PTR_ERR(dp->audio);
|
|
pr_err("failed to initialize audio, rc = %d\n", rc);
|
|
dp->audio = NULL;
|
|
goto error_ctrl;
|
|
}
|
|
|
|
/* populate wide_bus_en to differernt layers */
|
|
dp->ctrl->wide_bus_en = dp->wide_bus_en;
|
|
dp->catalog->wide_bus_en = dp->wide_bus_en;
|
|
|
|
return rc;
|
|
|
|
error_ctrl:
|
|
dp_panel_put(dp->panel);
|
|
error_link:
|
|
dp_aux_put(dp->aux);
|
|
error:
|
|
return rc;
|
|
}
|
|
|
|
static int dp_display_set_mode(struct msm_dp *dp_display,
|
|
struct dp_display_mode *mode)
|
|
{
|
|
struct dp_display_private *dp;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
drm_mode_copy(&dp->panel->dp_mode.drm_mode, &mode->drm_mode);
|
|
dp->panel->dp_mode.bpp = mode->bpp;
|
|
dp->panel->dp_mode.capabilities = mode->capabilities;
|
|
dp_panel_init_panel_info(dp->panel);
|
|
return 0;
|
|
}
|
|
|
|
static int dp_display_enable(struct dp_display_private *dp, bool force_link_train)
|
|
{
|
|
int rc = 0;
|
|
struct msm_dp *dp_display = &dp->dp_display;
|
|
|
|
drm_dbg_dp(dp->drm_dev, "sink_count=%d\n", dp->link->sink_count);
|
|
if (dp_display->power_on) {
|
|
drm_dbg_dp(dp->drm_dev, "Link already setup, return\n");
|
|
return 0;
|
|
}
|
|
|
|
rc = dp_ctrl_on_stream(dp->ctrl, force_link_train);
|
|
if (!rc)
|
|
dp_display->power_on = true;
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int dp_display_post_enable(struct msm_dp *dp_display)
|
|
{
|
|
struct dp_display_private *dp;
|
|
u32 rate;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
rate = dp->link->link_params.rate;
|
|
|
|
if (dp->audio_supported) {
|
|
dp->audio->bw_code = drm_dp_link_rate_to_bw_code(rate);
|
|
dp->audio->lane_count = dp->link->link_params.num_lanes;
|
|
}
|
|
|
|
/* signal the connect event late to synchronize video and display */
|
|
dp_display_handle_plugged_change(dp_display, true);
|
|
|
|
if (dp_display->psr_supported)
|
|
dp_ctrl_config_psr(dp->ctrl);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dp_display_disable(struct dp_display_private *dp)
|
|
{
|
|
struct msm_dp *dp_display = &dp->dp_display;
|
|
|
|
if (!dp_display->power_on)
|
|
return 0;
|
|
|
|
/* wait only if audio was enabled */
|
|
if (dp_display->audio_enabled) {
|
|
/* signal the disconnect event */
|
|
dp_display_handle_plugged_change(dp_display, false);
|
|
if (!wait_for_completion_timeout(&dp->audio_comp,
|
|
HZ * 5))
|
|
DRM_ERROR("audio comp timeout\n");
|
|
}
|
|
|
|
dp_display->audio_enabled = false;
|
|
|
|
if (dp->link->sink_count == 0) {
|
|
/*
|
|
* irq_hpd with sink_count = 0
|
|
* hdmi unplugged out of dongle
|
|
*/
|
|
dp_ctrl_off_link_stream(dp->ctrl);
|
|
} else {
|
|
/*
|
|
* unplugged interrupt
|
|
* dongle unplugged out of DUT
|
|
*/
|
|
dp_ctrl_off(dp->ctrl);
|
|
dp_display_host_phy_exit(dp);
|
|
}
|
|
|
|
dp_display->power_on = false;
|
|
|
|
drm_dbg_dp(dp->drm_dev, "sink count: %d\n", dp->link->sink_count);
|
|
return 0;
|
|
}
|
|
|
|
int dp_display_set_plugged_cb(struct msm_dp *dp_display,
|
|
hdmi_codec_plugged_cb fn, struct device *codec_dev)
|
|
{
|
|
bool plugged;
|
|
|
|
dp_display->plugged_cb = fn;
|
|
dp_display->codec_dev = codec_dev;
|
|
plugged = dp_display->is_connected;
|
|
dp_display_handle_plugged_change(dp_display, plugged);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* dp_bridge_mode_valid - callback to determine if specified mode is valid
|
|
* @bridge: Pointer to drm bridge structure
|
|
* @info: display info
|
|
* @mode: Pointer to drm mode structure
|
|
* Returns: Validity status for specified mode
|
|
*/
|
|
enum drm_mode_status dp_bridge_mode_valid(struct drm_bridge *bridge,
|
|
const struct drm_display_info *info,
|
|
const struct drm_display_mode *mode)
|
|
{
|
|
const u32 num_components = 3, default_bpp = 24;
|
|
struct dp_display_private *dp_display;
|
|
struct dp_link_info *link_info;
|
|
u32 mode_rate_khz = 0, supported_rate_khz = 0, mode_bpp = 0;
|
|
struct msm_dp *dp;
|
|
int mode_pclk_khz = mode->clock;
|
|
|
|
dp = to_dp_bridge(bridge)->dp_display;
|
|
|
|
if (!dp || !mode_pclk_khz || !dp->connector) {
|
|
DRM_ERROR("invalid params\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (mode->clock > DP_MAX_PIXEL_CLK_KHZ)
|
|
return MODE_CLOCK_HIGH;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
link_info = &dp_display->panel->link_info;
|
|
|
|
mode_bpp = dp->connector->display_info.bpc * num_components;
|
|
if (!mode_bpp)
|
|
mode_bpp = default_bpp;
|
|
|
|
mode_bpp = dp_panel_get_mode_bpp(dp_display->panel,
|
|
mode_bpp, mode_pclk_khz);
|
|
|
|
mode_rate_khz = mode_pclk_khz * mode_bpp;
|
|
supported_rate_khz = link_info->num_lanes * link_info->rate * 8;
|
|
|
|
if (mode_rate_khz > supported_rate_khz)
|
|
return MODE_BAD;
|
|
|
|
return MODE_OK;
|
|
}
|
|
|
|
int dp_display_get_modes(struct msm_dp *dp)
|
|
{
|
|
struct dp_display_private *dp_display;
|
|
|
|
if (!dp) {
|
|
DRM_ERROR("invalid params\n");
|
|
return 0;
|
|
}
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
return dp_panel_get_modes(dp_display->panel,
|
|
dp->connector);
|
|
}
|
|
|
|
bool dp_display_check_video_test(struct msm_dp *dp)
|
|
{
|
|
struct dp_display_private *dp_display;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
return dp_display->panel->video_test;
|
|
}
|
|
|
|
int dp_display_get_test_bpp(struct msm_dp *dp)
|
|
{
|
|
struct dp_display_private *dp_display;
|
|
|
|
if (!dp) {
|
|
DRM_ERROR("invalid params\n");
|
|
return 0;
|
|
}
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
return dp_link_bit_depth_to_bpp(
|
|
dp_display->link->test_video.test_bit_depth);
|
|
}
|
|
|
|
void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp)
|
|
{
|
|
struct dp_display_private *dp_display;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
/*
|
|
* if we are reading registers we need the link clocks to be on
|
|
* however till DP cable is connected this will not happen as we
|
|
* do not know the resolution to power up with. Hence check the
|
|
* power_on status before dumping DP registers to avoid crash due
|
|
* to unclocked access
|
|
*/
|
|
mutex_lock(&dp_display->event_mutex);
|
|
|
|
if (!dp->power_on) {
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
return;
|
|
}
|
|
|
|
dp_catalog_snapshot(dp_display->catalog, disp_state);
|
|
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
}
|
|
|
|
void dp_display_set_psr(struct msm_dp *dp_display, bool enter)
|
|
{
|
|
struct dp_display_private *dp;
|
|
|
|
if (!dp_display) {
|
|
DRM_ERROR("invalid params\n");
|
|
return;
|
|
}
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
dp_ctrl_set_psr(dp->ctrl, enter);
|
|
}
|
|
|
|
static int hpd_event_thread(void *data)
|
|
{
|
|
struct dp_display_private *dp_priv;
|
|
unsigned long flag;
|
|
struct dp_event *todo;
|
|
int timeout_mode = 0;
|
|
|
|
dp_priv = (struct dp_display_private *)data;
|
|
|
|
while (1) {
|
|
if (timeout_mode) {
|
|
wait_event_timeout(dp_priv->event_q,
|
|
(dp_priv->event_pndx == dp_priv->event_gndx) ||
|
|
kthread_should_stop(), EVENT_TIMEOUT);
|
|
} else {
|
|
wait_event_interruptible(dp_priv->event_q,
|
|
(dp_priv->event_pndx != dp_priv->event_gndx) ||
|
|
kthread_should_stop());
|
|
}
|
|
|
|
if (kthread_should_stop())
|
|
break;
|
|
|
|
spin_lock_irqsave(&dp_priv->event_lock, flag);
|
|
todo = &dp_priv->event_list[dp_priv->event_gndx];
|
|
if (todo->delay) {
|
|
struct dp_event *todo_next;
|
|
|
|
dp_priv->event_gndx++;
|
|
dp_priv->event_gndx %= DP_EVENT_Q_MAX;
|
|
|
|
/* re enter delay event into q */
|
|
todo_next = &dp_priv->event_list[dp_priv->event_pndx++];
|
|
dp_priv->event_pndx %= DP_EVENT_Q_MAX;
|
|
todo_next->event_id = todo->event_id;
|
|
todo_next->data = todo->data;
|
|
todo_next->delay = todo->delay - 1;
|
|
|
|
/* clean up older event */
|
|
todo->event_id = EV_NO_EVENT;
|
|
todo->delay = 0;
|
|
|
|
/* switch to timeout mode */
|
|
timeout_mode = 1;
|
|
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
|
|
continue;
|
|
}
|
|
|
|
/* timeout with no events in q */
|
|
if (dp_priv->event_pndx == dp_priv->event_gndx) {
|
|
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
|
|
continue;
|
|
}
|
|
|
|
dp_priv->event_gndx++;
|
|
dp_priv->event_gndx %= DP_EVENT_Q_MAX;
|
|
timeout_mode = 0;
|
|
spin_unlock_irqrestore(&dp_priv->event_lock, flag);
|
|
|
|
switch (todo->event_id) {
|
|
case EV_HPD_INIT_SETUP:
|
|
dp_display_host_init(dp_priv);
|
|
break;
|
|
case EV_HPD_PLUG_INT:
|
|
dp_hpd_plug_handle(dp_priv, todo->data);
|
|
break;
|
|
case EV_HPD_UNPLUG_INT:
|
|
dp_hpd_unplug_handle(dp_priv, todo->data);
|
|
break;
|
|
case EV_IRQ_HPD_INT:
|
|
dp_irq_hpd_handle(dp_priv, todo->data);
|
|
break;
|
|
case EV_USER_NOTIFICATION:
|
|
dp_display_send_hpd_notification(dp_priv,
|
|
todo->data);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dp_hpd_event_thread_start(struct dp_display_private *dp_priv)
|
|
{
|
|
/* set event q to empty */
|
|
dp_priv->event_gndx = 0;
|
|
dp_priv->event_pndx = 0;
|
|
|
|
dp_priv->ev_tsk = kthread_run(hpd_event_thread, dp_priv, "dp_hpd_handler");
|
|
if (IS_ERR(dp_priv->ev_tsk))
|
|
return PTR_ERR(dp_priv->ev_tsk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static irqreturn_t dp_display_irq_handler(int irq, void *dev_id)
|
|
{
|
|
struct dp_display_private *dp = dev_id;
|
|
irqreturn_t ret = IRQ_NONE;
|
|
u32 hpd_isr_status;
|
|
|
|
if (!dp) {
|
|
DRM_ERROR("invalid data\n");
|
|
return IRQ_NONE;
|
|
}
|
|
|
|
hpd_isr_status = dp_catalog_hpd_get_intr_status(dp->catalog);
|
|
|
|
if (hpd_isr_status & 0x0F) {
|
|
drm_dbg_dp(dp->drm_dev, "type=%d isr=0x%x\n",
|
|
dp->dp_display.connector_type, hpd_isr_status);
|
|
/* hpd related interrupts */
|
|
if (hpd_isr_status & DP_DP_HPD_PLUG_INT_MASK)
|
|
dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
|
|
|
|
if (hpd_isr_status & DP_DP_IRQ_HPD_INT_MASK) {
|
|
dp_add_event(dp, EV_IRQ_HPD_INT, 0, 0);
|
|
}
|
|
|
|
if (hpd_isr_status & DP_DP_HPD_REPLUG_INT_MASK) {
|
|
dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
|
|
dp_add_event(dp, EV_HPD_PLUG_INT, 0, 3);
|
|
}
|
|
|
|
if (hpd_isr_status & DP_DP_HPD_UNPLUG_INT_MASK)
|
|
dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
|
|
|
|
ret = IRQ_HANDLED;
|
|
}
|
|
|
|
/* DP controller isr */
|
|
ret |= dp_ctrl_isr(dp->ctrl);
|
|
|
|
/* DP aux isr */
|
|
ret |= dp_aux_isr(dp->aux);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int dp_display_request_irq(struct msm_dp *dp_display)
|
|
{
|
|
int rc = 0;
|
|
struct dp_display_private *dp;
|
|
|
|
if (!dp_display) {
|
|
DRM_ERROR("invalid input\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
dp->irq = irq_of_parse_and_map(dp->pdev->dev.of_node, 0);
|
|
if (!dp->irq) {
|
|
DRM_ERROR("failed to get irq\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
rc = devm_request_irq(dp_display->drm_dev->dev, dp->irq,
|
|
dp_display_irq_handler,
|
|
IRQF_TRIGGER_HIGH, "dp_display_isr", dp);
|
|
if (rc < 0) {
|
|
DRM_ERROR("failed to request IRQ%u: %d\n",
|
|
dp->irq, rc);
|
|
return rc;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct msm_dp_desc *dp_display_get_desc(struct platform_device *pdev)
|
|
{
|
|
const struct msm_dp_desc *descs = of_device_get_match_data(&pdev->dev);
|
|
struct resource *res;
|
|
int i;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
if (!res)
|
|
return NULL;
|
|
|
|
for (i = 0; i < descs[i].io_start; i++) {
|
|
if (descs[i].io_start == res->start)
|
|
return &descs[i];
|
|
}
|
|
|
|
dev_err(&pdev->dev, "unknown displayport instance\n");
|
|
return NULL;
|
|
}
|
|
|
|
static int dp_display_probe(struct platform_device *pdev)
|
|
{
|
|
int rc = 0;
|
|
struct dp_display_private *dp;
|
|
const struct msm_dp_desc *desc;
|
|
|
|
if (!pdev || !pdev->dev.of_node) {
|
|
DRM_ERROR("pdev not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
dp = devm_kzalloc(&pdev->dev, sizeof(*dp), GFP_KERNEL);
|
|
if (!dp)
|
|
return -ENOMEM;
|
|
|
|
desc = dp_display_get_desc(pdev);
|
|
if (!desc)
|
|
return -EINVAL;
|
|
|
|
dp->pdev = pdev;
|
|
dp->name = "drm_dp";
|
|
dp->id = desc->id;
|
|
dp->dp_display.connector_type = desc->connector_type;
|
|
dp->wide_bus_en = desc->wide_bus_en;
|
|
dp->dp_display.is_edp =
|
|
(dp->dp_display.connector_type == DRM_MODE_CONNECTOR_eDP);
|
|
|
|
rc = dp_init_sub_modules(dp);
|
|
if (rc) {
|
|
DRM_ERROR("init sub module failed\n");
|
|
return -EPROBE_DEFER;
|
|
}
|
|
|
|
/* setup event q */
|
|
mutex_init(&dp->event_mutex);
|
|
init_waitqueue_head(&dp->event_q);
|
|
spin_lock_init(&dp->event_lock);
|
|
|
|
/* Store DP audio handle inside DP display */
|
|
dp->dp_display.dp_audio = dp->audio;
|
|
|
|
init_completion(&dp->audio_comp);
|
|
|
|
platform_set_drvdata(pdev, &dp->dp_display);
|
|
|
|
rc = component_add(&pdev->dev, &dp_display_comp_ops);
|
|
if (rc) {
|
|
DRM_ERROR("component add failed, rc=%d\n", rc);
|
|
dp_display_deinit_sub_modules(dp);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static int dp_display_remove(struct platform_device *pdev)
|
|
{
|
|
struct dp_display_private *dp = dev_get_dp_display_private(&pdev->dev);
|
|
|
|
component_del(&pdev->dev, &dp_display_comp_ops);
|
|
dp_display_deinit_sub_modules(dp);
|
|
|
|
platform_set_drvdata(pdev, NULL);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dp_pm_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct msm_dp *dp_display = platform_get_drvdata(pdev);
|
|
struct dp_display_private *dp;
|
|
int sink_count = 0;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
|
|
drm_dbg_dp(dp->drm_dev,
|
|
"Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
|
|
dp->dp_display.connector_type, dp->core_initialized,
|
|
dp->phy_initialized, dp_display->power_on);
|
|
|
|
/* start from disconnected state */
|
|
dp->hpd_state = ST_DISCONNECTED;
|
|
|
|
/* turn on dp ctrl/phy */
|
|
dp_display_host_init(dp);
|
|
|
|
if (dp_display->is_edp)
|
|
dp_catalog_ctrl_hpd_enable(dp->catalog);
|
|
|
|
if (dp_catalog_link_is_connected(dp->catalog)) {
|
|
/*
|
|
* set sink to normal operation mode -- D0
|
|
* before dpcd read
|
|
*/
|
|
dp_display_host_phy_init(dp);
|
|
dp_link_psm_config(dp->link, &dp->panel->link_info, false);
|
|
sink_count = drm_dp_read_sink_count(dp->aux);
|
|
if (sink_count < 0)
|
|
sink_count = 0;
|
|
|
|
dp_display_host_phy_exit(dp);
|
|
}
|
|
|
|
dp->link->sink_count = sink_count;
|
|
/*
|
|
* can not declared display is connected unless
|
|
* HDMI cable is plugged in and sink_count of
|
|
* dongle become 1
|
|
* also only signal audio when disconnected
|
|
*/
|
|
if (dp->link->sink_count) {
|
|
dp->dp_display.is_connected = true;
|
|
} else {
|
|
dp->dp_display.is_connected = false;
|
|
dp_display_handle_plugged_change(dp_display, false);
|
|
}
|
|
|
|
drm_dbg_dp(dp->drm_dev,
|
|
"After, type=%d sink=%d conn=%d core_init=%d phy_init=%d power=%d\n",
|
|
dp->dp_display.connector_type, dp->link->sink_count,
|
|
dp->dp_display.is_connected, dp->core_initialized,
|
|
dp->phy_initialized, dp_display->power_on);
|
|
|
|
mutex_unlock(&dp->event_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int dp_pm_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct msm_dp *dp_display = platform_get_drvdata(pdev);
|
|
struct dp_display_private *dp;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
|
|
drm_dbg_dp(dp->drm_dev,
|
|
"Before, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
|
|
dp->dp_display.connector_type, dp->core_initialized,
|
|
dp->phy_initialized, dp_display->power_on);
|
|
|
|
/* mainlink enabled */
|
|
if (dp_power_clk_status(dp->power, DP_CTRL_PM))
|
|
dp_ctrl_off_link_stream(dp->ctrl);
|
|
|
|
dp_display_host_phy_exit(dp);
|
|
|
|
/* host_init will be called at pm_resume */
|
|
dp_display_host_deinit(dp);
|
|
|
|
dp->hpd_state = ST_SUSPENDED;
|
|
|
|
drm_dbg_dp(dp->drm_dev,
|
|
"After, type=%d core_inited=%d phy_inited=%d power_on=%d\n",
|
|
dp->dp_display.connector_type, dp->core_initialized,
|
|
dp->phy_initialized, dp_display->power_on);
|
|
|
|
mutex_unlock(&dp->event_mutex);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct dev_pm_ops dp_pm_ops = {
|
|
.suspend = dp_pm_suspend,
|
|
.resume = dp_pm_resume,
|
|
};
|
|
|
|
static struct platform_driver dp_display_driver = {
|
|
.probe = dp_display_probe,
|
|
.remove = dp_display_remove,
|
|
.driver = {
|
|
.name = "msm-dp-display",
|
|
.of_match_table = dp_dt_match,
|
|
.suppress_bind_attrs = true,
|
|
.pm = &dp_pm_ops,
|
|
},
|
|
};
|
|
|
|
int __init msm_dp_register(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&dp_display_driver);
|
|
if (ret)
|
|
DRM_ERROR("Dp display driver register failed");
|
|
|
|
return ret;
|
|
}
|
|
|
|
void __exit msm_dp_unregister(void)
|
|
{
|
|
platform_driver_unregister(&dp_display_driver);
|
|
}
|
|
|
|
void msm_dp_irq_postinstall(struct msm_dp *dp_display)
|
|
{
|
|
struct dp_display_private *dp;
|
|
|
|
if (!dp_display)
|
|
return;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
if (!dp_display->is_edp)
|
|
dp_add_event(dp, EV_HPD_INIT_SETUP, 0, 0);
|
|
}
|
|
|
|
bool msm_dp_wide_bus_available(const struct msm_dp *dp_display)
|
|
{
|
|
struct dp_display_private *dp;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
return dp->wide_bus_en;
|
|
}
|
|
|
|
void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor)
|
|
{
|
|
struct dp_display_private *dp;
|
|
struct device *dev;
|
|
int rc;
|
|
|
|
dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
dev = &dp->pdev->dev;
|
|
|
|
dp->debug = dp_debug_get(dev, dp->panel,
|
|
dp->link, dp->dp_display.connector,
|
|
minor);
|
|
if (IS_ERR(dp->debug)) {
|
|
rc = PTR_ERR(dp->debug);
|
|
DRM_ERROR("failed to initialize debug, rc = %d\n", rc);
|
|
dp->debug = NULL;
|
|
}
|
|
}
|
|
|
|
static int dp_display_get_next_bridge(struct msm_dp *dp)
|
|
{
|
|
int rc;
|
|
struct dp_display_private *dp_priv;
|
|
struct device_node *aux_bus;
|
|
struct device *dev;
|
|
|
|
dp_priv = container_of(dp, struct dp_display_private, dp_display);
|
|
dev = &dp_priv->pdev->dev;
|
|
aux_bus = of_get_child_by_name(dev->of_node, "aux-bus");
|
|
|
|
if (aux_bus && dp->is_edp) {
|
|
dp_display_host_init(dp_priv);
|
|
dp_catalog_ctrl_hpd_enable(dp_priv->catalog);
|
|
dp_display_host_phy_init(dp_priv);
|
|
|
|
/*
|
|
* The code below assumes that the panel will finish probing
|
|
* by the time devm_of_dp_aux_populate_ep_devices() returns.
|
|
* This isn't a great assumption since it will fail if the
|
|
* panel driver is probed asynchronously but is the best we
|
|
* can do without a bigger driver reorganization.
|
|
*/
|
|
rc = of_dp_aux_populate_bus(dp_priv->aux, NULL);
|
|
of_node_put(aux_bus);
|
|
if (rc)
|
|
goto error;
|
|
} else if (dp->is_edp) {
|
|
DRM_ERROR("eDP aux_bus not found\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
/*
|
|
* External bridges are mandatory for eDP interfaces: one has to
|
|
* provide at least an eDP panel (which gets wrapped into panel-bridge).
|
|
*
|
|
* For DisplayPort interfaces external bridges are optional, so
|
|
* silently ignore an error if one is not present (-ENODEV).
|
|
*/
|
|
rc = devm_dp_parser_find_next_bridge(dp->drm_dev->dev, dp_priv->parser);
|
|
if (!dp->is_edp && rc == -ENODEV)
|
|
return 0;
|
|
|
|
if (!rc) {
|
|
dp->next_bridge = dp_priv->parser->next_bridge;
|
|
return 0;
|
|
}
|
|
|
|
error:
|
|
if (dp->is_edp) {
|
|
of_dp_aux_depopulate_bus(dp_priv->aux);
|
|
dp_display_host_phy_exit(dp_priv);
|
|
dp_display_host_deinit(dp_priv);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
int msm_dp_modeset_init(struct msm_dp *dp_display, struct drm_device *dev,
|
|
struct drm_encoder *encoder)
|
|
{
|
|
struct msm_drm_private *priv = dev->dev_private;
|
|
struct dp_display_private *dp_priv;
|
|
int ret;
|
|
|
|
dp_display->drm_dev = dev;
|
|
|
|
dp_priv = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
ret = dp_display_request_irq(dp_display);
|
|
if (ret) {
|
|
DRM_ERROR("request_irq failed, ret=%d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = dp_display_get_next_bridge(dp_display);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dp_display->bridge = dp_bridge_init(dp_display, dev, encoder);
|
|
if (IS_ERR(dp_display->bridge)) {
|
|
ret = PTR_ERR(dp_display->bridge);
|
|
DRM_DEV_ERROR(dev->dev,
|
|
"failed to create dp bridge: %d\n", ret);
|
|
dp_display->bridge = NULL;
|
|
return ret;
|
|
}
|
|
|
|
priv->bridges[priv->num_bridges++] = dp_display->bridge;
|
|
|
|
dp_display->connector = dp_drm_connector_init(dp_display, encoder);
|
|
if (IS_ERR(dp_display->connector)) {
|
|
ret = PTR_ERR(dp_display->connector);
|
|
DRM_DEV_ERROR(dev->dev,
|
|
"failed to create dp connector: %d\n", ret);
|
|
dp_display->connector = NULL;
|
|
return ret;
|
|
}
|
|
|
|
dp_priv->panel->connector = dp_display->connector;
|
|
|
|
return 0;
|
|
}
|
|
|
|
void dp_bridge_atomic_enable(struct drm_bridge *drm_bridge,
|
|
struct drm_bridge_state *old_bridge_state)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
|
|
struct msm_dp *dp = dp_bridge->dp_display;
|
|
int rc = 0;
|
|
struct dp_display_private *dp_display;
|
|
u32 state;
|
|
bool force_link_train = false;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
if (!dp_display->dp_mode.drm_mode.clock) {
|
|
DRM_ERROR("invalid params\n");
|
|
return;
|
|
}
|
|
|
|
if (dp->is_edp)
|
|
dp_hpd_plug_handle(dp_display, 0);
|
|
|
|
mutex_lock(&dp_display->event_mutex);
|
|
|
|
state = dp_display->hpd_state;
|
|
if (state != ST_DISPLAY_OFF && state != ST_MAINLINK_READY) {
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
return;
|
|
}
|
|
|
|
rc = dp_display_set_mode(dp, &dp_display->dp_mode);
|
|
if (rc) {
|
|
DRM_ERROR("Failed to perform a mode set, rc=%d\n", rc);
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
return;
|
|
}
|
|
|
|
state = dp_display->hpd_state;
|
|
|
|
if (state == ST_DISPLAY_OFF) {
|
|
dp_display_host_phy_init(dp_display);
|
|
force_link_train = true;
|
|
}
|
|
|
|
dp_display_enable(dp_display, force_link_train);
|
|
|
|
rc = dp_display_post_enable(dp);
|
|
if (rc) {
|
|
DRM_ERROR("DP display post enable failed, rc=%d\n", rc);
|
|
dp_display_disable(dp_display);
|
|
}
|
|
|
|
/* completed connection */
|
|
dp_display->hpd_state = ST_CONNECTED;
|
|
|
|
drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
}
|
|
|
|
void dp_bridge_atomic_disable(struct drm_bridge *drm_bridge,
|
|
struct drm_bridge_state *old_bridge_state)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
|
|
struct msm_dp *dp = dp_bridge->dp_display;
|
|
struct dp_display_private *dp_display;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
dp_ctrl_push_idle(dp_display->ctrl);
|
|
}
|
|
|
|
void dp_bridge_atomic_post_disable(struct drm_bridge *drm_bridge,
|
|
struct drm_bridge_state *old_bridge_state)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
|
|
struct msm_dp *dp = dp_bridge->dp_display;
|
|
u32 state;
|
|
struct dp_display_private *dp_display;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
if (dp->is_edp)
|
|
dp_hpd_unplug_handle(dp_display, 0);
|
|
|
|
mutex_lock(&dp_display->event_mutex);
|
|
|
|
state = dp_display->hpd_state;
|
|
if (state != ST_DISCONNECT_PENDING && state != ST_CONNECTED) {
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
return;
|
|
}
|
|
|
|
dp_display_disable(dp_display);
|
|
|
|
state = dp_display->hpd_state;
|
|
if (state == ST_DISCONNECT_PENDING) {
|
|
/* completed disconnection */
|
|
dp_display->hpd_state = ST_DISCONNECTED;
|
|
} else {
|
|
dp_display->hpd_state = ST_DISPLAY_OFF;
|
|
}
|
|
|
|
drm_dbg_dp(dp->drm_dev, "type=%d Done\n", dp->connector_type);
|
|
mutex_unlock(&dp_display->event_mutex);
|
|
}
|
|
|
|
void dp_bridge_mode_set(struct drm_bridge *drm_bridge,
|
|
const struct drm_display_mode *mode,
|
|
const struct drm_display_mode *adjusted_mode)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(drm_bridge);
|
|
struct msm_dp *dp = dp_bridge->dp_display;
|
|
struct dp_display_private *dp_display;
|
|
|
|
dp_display = container_of(dp, struct dp_display_private, dp_display);
|
|
|
|
memset(&dp_display->dp_mode, 0x0, sizeof(struct dp_display_mode));
|
|
|
|
if (dp_display_check_video_test(dp))
|
|
dp_display->dp_mode.bpp = dp_display_get_test_bpp(dp);
|
|
else /* Default num_components per pixel = 3 */
|
|
dp_display->dp_mode.bpp = dp->connector->display_info.bpc * 3;
|
|
|
|
if (!dp_display->dp_mode.bpp)
|
|
dp_display->dp_mode.bpp = 24; /* Default bpp */
|
|
|
|
drm_mode_copy(&dp_display->dp_mode.drm_mode, adjusted_mode);
|
|
|
|
dp_display->dp_mode.v_active_low =
|
|
!!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NVSYNC);
|
|
|
|
dp_display->dp_mode.h_active_low =
|
|
!!(dp_display->dp_mode.drm_mode.flags & DRM_MODE_FLAG_NHSYNC);
|
|
}
|
|
|
|
void dp_bridge_hpd_enable(struct drm_bridge *bridge)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
|
|
struct msm_dp *dp_display = dp_bridge->dp_display;
|
|
struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
dp_catalog_ctrl_hpd_enable(dp->catalog);
|
|
|
|
/* enable HDP interrupts */
|
|
dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, true);
|
|
|
|
dp_display->internal_hpd = true;
|
|
mutex_unlock(&dp->event_mutex);
|
|
}
|
|
|
|
void dp_bridge_hpd_disable(struct drm_bridge *bridge)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
|
|
struct msm_dp *dp_display = dp_bridge->dp_display;
|
|
struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
mutex_lock(&dp->event_mutex);
|
|
/* disable HDP interrupts */
|
|
dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_INT_MASK, false);
|
|
dp_catalog_ctrl_hpd_disable(dp->catalog);
|
|
|
|
dp_display->internal_hpd = false;
|
|
mutex_unlock(&dp->event_mutex);
|
|
}
|
|
|
|
void dp_bridge_hpd_notify(struct drm_bridge *bridge,
|
|
enum drm_connector_status status)
|
|
{
|
|
struct msm_dp_bridge *dp_bridge = to_dp_bridge(bridge);
|
|
struct msm_dp *dp_display = dp_bridge->dp_display;
|
|
struct dp_display_private *dp = container_of(dp_display, struct dp_display_private, dp_display);
|
|
|
|
/* Without next_bridge interrupts are handled by the DP core directly */
|
|
if (dp_display->internal_hpd)
|
|
return;
|
|
|
|
if (!dp->core_initialized) {
|
|
drm_dbg_dp(dp->drm_dev, "not initialized\n");
|
|
return;
|
|
}
|
|
|
|
if (!dp_display->is_connected && status == connector_status_connected)
|
|
dp_add_event(dp, EV_HPD_PLUG_INT, 0, 0);
|
|
else if (dp_display->is_connected && status == connector_status_disconnected)
|
|
dp_add_event(dp, EV_HPD_UNPLUG_INT, 0, 0);
|
|
}
|