drm/msm/dp: remove most of usbpd-related remains

Remove most of remains of downstream usbpd code. Mainline kernel uses
different approach for managing Type-C / USB-PD, so this remains unused.

Signed-off-by: Dmitry Baryshkov <[e-mail]>
Reviewed-by: Bjorn Andersson <[e-mail]>
Patchwork: https://patchwork.freedesktop.org/patch/538270/
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Dmitry Baryshkov <[e-mail]>

drivers/gpu/drm/msm/Makefile

···
 	dp/dp_ctrl.o \
 	dp/dp_display.o \
 	dp/dp_drm.o \
-	dp/dp_hpd.o \
 	dp/dp_link.o \
 	dp/dp_panel.o \
 	dp/dp_parser.o \

drivers/gpu/drm/msm/dp/dp_ctrl.h

···
 #include "dp_catalog.h"
 
 struct dp_ctrl {
-	bool orientation;
 	atomic_t aborted;
 	bool wide_bus_en;
 };

drivers/gpu/drm/msm/dp/dp_debug.c

···
 struct dp_debug_private {
 	struct dentry *root;
 
-	struct dp_usbpd *usbpd;
 	struct dp_link *link;
 	struct dp_panel *panel;
 	struct drm_connector *connector;
···
 }
 
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_usbpd *usbpd, struct dp_link *link,
+		struct dp_link *link,
 		struct drm_connector *connector, struct drm_minor *minor)
 {
 	struct dp_debug_private *debug;
 	struct dp_debug *dp_debug;
 	int rc;
 
-	if (!dev || !panel || !usbpd || !link) {
+	if (!dev || !panel || !link) {
 		DRM_ERROR("invalid input\n");
 		rc = -EINVAL;
 		goto error;
···
 	}
 
 	debug->dp_debug.debug_en = false;
-	debug->usbpd = usbpd;
 	debug->link = link;
 	debug->panel = panel;
 	debug->dev = dev;

drivers/gpu/drm/msm/dp/dp_debug.h

···
  *
  * @dev: device instance of the caller
  * @panel: instance of panel module
- * @usbpd: instance of usbpd module
  * @link: instance of link module
  * @connector: double pointer to display connector
  * @minor: pointer to drm minor number after device registration
···
  * for debugfs input to be communicated with existing modules
  */
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_usbpd *usbpd, struct dp_link *link,
+		struct dp_link *link,
 		struct drm_connector *connector,
 		struct drm_minor *minor);
 
···
 
 static inline
 struct dp_debug *dp_debug_get(struct device *dev, struct dp_panel *panel,
-		struct dp_usbpd *usbpd, struct dp_link *link,
+		struct dp_link *link,
 		struct drm_connector *connector, struct drm_minor *minor)
 {
 	return ERR_PTR(-EINVAL);

drivers/gpu/drm/msm/dp/dp_display.c

···
 
 #include "msm_drv.h"
 #include "msm_kms.h"
-#include "dp_hpd.h"
 #include "dp_parser.h"
 #include "dp_power.h"
 #include "dp_catalog.h"
···
 	struct platform_device *pdev;
 	struct dentry *root;
 
-	struct dp_usbpd   *usbpd;
 	struct dp_parser  *parser;
 	struct dp_power   *power;
 	struct dp_catalog *catalog;
···
 	struct dp_ctrl    *ctrl;
 	struct dp_debug   *debug;
 
-	struct dp_usbpd_cb usbpd_cb;
 	struct dp_display_mode dp_mode;
 	struct msm_dp dp_display;
 
···
 		dp->dp_display.connector_type, dp->core_initialized,
 		dp->phy_initialized);
 
-	dp_power_init(dp->power, false);
+	dp_power_init(dp->power);
 	dp_ctrl_reset_irq_ctrl(dp->ctrl, true);
 	dp_aux_init(dp->aux);
 	dp->core_initialized = true;
···
 	dp_display_host_phy_init(dp);
 
 	return dp_display_process_hpd_high(dp);
-}
-
-static int dp_display_usbpd_disconnect_cb(struct device *dev)
-{
-	return 0;
 }
 
 static int dp_display_notify_disconnect(struct device *dev)
···
 
 static int dp_hpd_plug_handle(struct dp_display_private *dp, u32 data)
 {
-	struct dp_usbpd *hpd = dp->usbpd;
 	u32 state;
 	int ret;
-
-	if (!hpd)
-		return 0;
 
 	mutex_lock(&dp->event_mutex);
 
···
 
 static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 {
-	struct dp_usbpd *hpd = dp->usbpd;
 	u32 state;
-
-	if (!hpd)
-		return 0;
 
 	mutex_lock(&dp->event_mutex);
 
···
 {
 	int rc = 0;
 	struct device *dev = &dp->pdev->dev;
-	struct dp_usbpd_cb *cb = &dp->usbpd_cb;
 	struct dp_panel_in panel_in = {
 		.dev = dev,
 	};
-
-	/* Callback APIs used for cable status change event */
-	cb->configure  = dp_display_usbpd_configure_cb;
-	cb->disconnect = dp_display_usbpd_disconnect_cb;
-	cb->attention  = dp_display_usbpd_attention_cb;
-
-	dp->usbpd = dp_hpd_get(dev, cb);
-	if (IS_ERR(dp->usbpd)) {
-		rc = PTR_ERR(dp->usbpd);
-		DRM_ERROR("failed to initialize hpd, rc = %d\n", rc);
-		dp->usbpd = NULL;
-		goto error;
-	}
 
 	dp->parser = dp_parser_get(dp->pdev);
 	if (IS_ERR(dp->parser)) {
···
 	dp = container_of(dp_display, struct dp_display_private, dp_display);
 	dev = &dp->pdev->dev;
 
-	dp->debug = dp_debug_get(dev, dp->panel, dp->usbpd,
+	dp->debug = dp_debug_get(dev, dp->panel,
 					dp->link, dp->dp_display.connector,
 					minor);
 	if (IS_ERR(dp->debug)) {

drivers/gpu/drm/msm/dp/dp_hpd.c

···
-// SPDX-License-Identifier: GPL-2.0-only
-/*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
- */
-
-#define pr_fmt(fmt)	"[drm-dp] %s: " fmt, __func__
-
-#include <linux/slab.h>
-#include <linux/device.h>
-
-#include "dp_hpd.h"
-
-/* DP specific VDM commands */
-#define DP_USBPD_VDM_STATUS	0x10
-#define DP_USBPD_VDM_CONFIGURE	0x11
-
-/* USBPD-TypeC specific Macros */
-#define VDM_VERSION		0x0
-#define USB_C_DP_SID		0xFF01
-
-struct dp_hpd_private {
-	struct device *dev;
-	struct dp_usbpd_cb *dp_cb;
-	struct dp_usbpd dp_usbpd;
-};
-
-int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd)
-{
-	int rc = 0;
-	struct dp_hpd_private *hpd_priv;
-
-	hpd_priv = container_of(dp_usbpd, struct dp_hpd_private,
-					dp_usbpd);
-
-	if (!hpd_priv->dp_cb || !hpd_priv->dp_cb->configure
-				|| !hpd_priv->dp_cb->disconnect) {
-		pr_err("hpd dp_cb not initialized\n");
-		return -EINVAL;
-	}
-	if (hpd)
-		hpd_priv->dp_cb->configure(hpd_priv->dev);
-	else
-		hpd_priv->dp_cb->disconnect(hpd_priv->dev);
-
-	return rc;
-}
-
-struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb)
-{
-	struct dp_hpd_private *dp_hpd;
-
-	if (!cb) {
-		pr_err("invalid cb data\n");
-		return ERR_PTR(-EINVAL);
-	}
-
-	dp_hpd = devm_kzalloc(dev, sizeof(*dp_hpd), GFP_KERNEL);
-	if (!dp_hpd)
-		return ERR_PTR(-ENOMEM);
-
-	dp_hpd->dev = dev;
-	dp_hpd->dp_cb = cb;
-
-	dp_hpd->dp_usbpd.connect = dp_hpd_connect;
-
-	return &dp_hpd->dp_usbpd;
-}

drivers/gpu/drm/msm/dp/dp_hpd.h

···
-/* SPDX-License-Identifier: GPL-2.0-only */
-/*
- * Copyright (c) 2012-2020, The Linux Foundation. All rights reserved.
- */
-
-#ifndef _DP_HPD_H_
-#define _DP_HPD_H_
-
-//#include <linux/usb/usbpd.h>
-
-#include <linux/types.h>
-#include <linux/device.h>
-
-enum plug_orientation {
-	ORIENTATION_NONE,
-	ORIENTATION_CC1,
-	ORIENTATION_CC2,
-};
-
-/**
- * struct dp_usbpd - DisplayPort status
- *
- * @orientation: plug orientation configuration
- * @low_pow_st: low power state
- * @adaptor_dp_en: adaptor functionality enabled
- * @multi_func: multi-function preferred
- * @usb_config_req: request to switch to usb
- * @exit_dp_mode: request exit from displayport mode
- * @hpd_irq: Change in the status since last message
- * @alt_mode_cfg_done: bool to specify alt mode status
- * @debug_en: bool to specify debug mode
- * @connect: simulate disconnect or connect for debug mode
- */
-struct dp_usbpd {
-	enum plug_orientation orientation;
-	bool low_pow_st;
-	bool adaptor_dp_en;
-	bool multi_func;
-	bool usb_config_req;
-	bool exit_dp_mode;
-	bool hpd_irq;
-	bool alt_mode_cfg_done;
-	bool debug_en;
-
-	int (*connect)(struct dp_usbpd *dp_usbpd, bool hpd);
-};
-
-/**
- * struct dp_usbpd_cb - callback functions provided by the client
- *
- * @configure: called by usbpd module when PD communication has
- * been completed and the usb peripheral has been configured on
- * dp mode.
- * @disconnect: notify the cable disconnect issued by usb.
- * @attention: notify any attention message issued by usb.
- */
-struct dp_usbpd_cb {
-	int (*configure)(struct device *dev);
-	int (*disconnect)(struct device *dev);
-	int (*attention)(struct device *dev);
-};
-
-/**
- * dp_hpd_get() - setup hpd module
- *
- * @dev: device instance of the caller
- * @cb: struct containing callback function pointers.
- *
- * This function allows the client to initialize the usbpd
- * module. The module will communicate with HPD module.
- */
-struct dp_usbpd *dp_hpd_get(struct device *dev, struct dp_usbpd_cb *cb);
-
-int dp_hpd_register(struct dp_usbpd *dp_usbpd);
-void dp_hpd_unregister(struct dp_usbpd *dp_usbpd);
-int dp_hpd_connect(struct dp_usbpd *dp_usbpd, bool hpd);
-
-#endif /* _DP_HPD_H_ */

drivers/gpu/drm/msm/dp/dp_panel.h

···
 
 #include "dp_aux.h"
 #include "dp_link.h"
-#include "dp_hpd.h"
 
 struct edid;
 

drivers/gpu/drm/msm/dp/dp_power.c

···
 	pm_runtime_disable(&power->pdev->dev);
 }
 
-int dp_power_init(struct dp_power *dp_power, bool flip)
+int dp_power_init(struct dp_power *dp_power)
 {
 	int rc = 0;
 	struct dp_power_private *power = NULL;

drivers/gpu/drm/msm/dp/dp_power.h

···
  * dp_power_init() - enable power supplies for display controller
  *
  * @power: instance of power module
- * @flip: bool for flipping gpio direction
  * return: 0 if success or error if failure.
  *
  * This API will turn on the regulators and configures gpio's
  * aux/hpd.
  */
-int dp_power_init(struct dp_power *power, bool flip);
+int dp_power_init(struct dp_power *power);
 
 /**
  * dp_power_deinit() - turn off regulators and gpios.