Linux-libre 4.3.2-gnu

1 files changed, 0 insertions, 411 deletions

diff --git a/drivers/gpu/drm/bridge/ptn3460.c b/drivers/gpu/drm/bridge/ptn3460.c
deleted file mode 100644
index 1b1bf2384..000000000
--- a/drivers/gpu/drm/bridge/ptn3460.c
+++ /dev/null
@@ -1,411 +0,0 @@
-/*
- * NXP PTN3460 DP/LVDS bridge driver
- *
- * Copyright (C) 2013 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#include <linux/delay.h>
-#include <linux/gpio.h>
-#include <linux/gpio/consumer.h>
-#include <linux/i2c.h>
-#include <linux/module.h>
-#include <linux/of.h>
-#include <linux/of_gpio.h>
-#include <linux/of_graph.h>
-
-#include <drm/drm_panel.h>
-
-#include "drm_crtc.h"
-#include "drm_crtc_helper.h"
-#include "drm_atomic_helper.h"
-#include "drm_edid.h"
-#include "drmP.h"
-
-#define PTN3460_EDID_ADDR			0x0
-#define PTN3460_EDID_EMULATION_ADDR		0x84
-#define PTN3460_EDID_ENABLE_EMULATION		0
-#define PTN3460_EDID_EMULATION_SELECTION	1
-#define PTN3460_EDID_SRAM_LOAD_ADDR		0x85
-
-struct ptn3460_bridge {
-	struct drm_connector connector;
-	struct i2c_client *client;
-	struct drm_bridge bridge;
-	struct edid *edid;
-	struct drm_panel *panel;
-	struct gpio_desc *gpio_pd_n;
-	struct gpio_desc *gpio_rst_n;
-	u32 edid_emulation;
-	bool enabled;
-};
-
-static inline struct ptn3460_bridge *
-		bridge_to_ptn3460(struct drm_bridge *bridge)
-{
-	return container_of(bridge, struct ptn3460_bridge, bridge);
-}
-
-static inline struct ptn3460_bridge *
-		connector_to_ptn3460(struct drm_connector *connector)
-{
-	return container_of(connector, struct ptn3460_bridge, connector);
-}
-
-static int ptn3460_read_bytes(struct ptn3460_bridge *ptn_bridge, char addr,
-		u8 *buf, int len)
-{
-	int ret;
-
-	ret = i2c_master_send(ptn_bridge->client, &addr, 1);
-	if (ret <= 0) {
-		DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
-		return ret;
-	}
-
-	ret = i2c_master_recv(ptn_bridge->client, buf, len);
-	if (ret <= 0) {
-		DRM_ERROR("Failed to recv i2c data, ret=%d\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static int ptn3460_write_byte(struct ptn3460_bridge *ptn_bridge, char addr,
-		char val)
-{
-	int ret;
-	char buf[2];
-
-	buf[0] = addr;
-	buf[1] = val;
-
-	ret = i2c_master_send(ptn_bridge->client, buf, ARRAY_SIZE(buf));
-	if (ret <= 0) {
-		DRM_ERROR("Failed to send i2c command, ret=%d\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static int ptn3460_select_edid(struct ptn3460_bridge *ptn_bridge)
-{
-	int ret;
-	char val;
-
-	/* Load the selected edid into SRAM (accessed at PTN3460_EDID_ADDR) */
-	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_SRAM_LOAD_ADDR,
-			ptn_bridge->edid_emulation);
-	if (ret) {
-		DRM_ERROR("Failed to transfer EDID to sram, ret=%d\n", ret);
-		return ret;
-	}
-
-	/* Enable EDID emulation and select the desired EDID */
-	val = 1 << PTN3460_EDID_ENABLE_EMULATION |
-		ptn_bridge->edid_emulation << PTN3460_EDID_EMULATION_SELECTION;
-
-	ret = ptn3460_write_byte(ptn_bridge, PTN3460_EDID_EMULATION_ADDR, val);
-	if (ret) {
-		DRM_ERROR("Failed to write EDID value, ret=%d\n", ret);
-		return ret;
-	}
-
-	return 0;
-}
-
-static void ptn3460_pre_enable(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-	int ret;
-
-	if (ptn_bridge->enabled)
-		return;
-
-	gpiod_set_value(ptn_bridge->gpio_pd_n, 1);
-
-	gpiod_set_value(ptn_bridge->gpio_rst_n, 0);
-	usleep_range(10, 20);
-	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
-
-	if (drm_panel_prepare(ptn_bridge->panel)) {
-		DRM_ERROR("failed to prepare panel\n");
-		return;
-	}
-
-	/*
-	 * There's a bug in the PTN chip where it falsely asserts hotplug before
-	 * it is fully functional. We're forced to wait for the maximum start up
-	 * time specified in the chip's datasheet to make sure we're really up.
-	 */
-	msleep(90);
-
-	ret = ptn3460_select_edid(ptn_bridge);
-	if (ret)
-		DRM_ERROR("Select EDID failed ret=%d\n", ret);
-
-	ptn_bridge->enabled = true;
-}
-
-static void ptn3460_enable(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-
-	if (drm_panel_enable(ptn_bridge->panel)) {
-		DRM_ERROR("failed to enable panel\n");
-		return;
-	}
-}
-
-static void ptn3460_disable(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-
-	if (!ptn_bridge->enabled)
-		return;
-
-	ptn_bridge->enabled = false;
-
-	if (drm_panel_disable(ptn_bridge->panel)) {
-		DRM_ERROR("failed to disable panel\n");
-		return;
-	}
-
-	gpiod_set_value(ptn_bridge->gpio_rst_n, 1);
-	gpiod_set_value(ptn_bridge->gpio_pd_n, 0);
-}
-
-static void ptn3460_post_disable(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-
-	if (drm_panel_unprepare(ptn_bridge->panel)) {
-		DRM_ERROR("failed to unprepare panel\n");
-		return;
-	}
-}
-
-static int ptn3460_get_modes(struct drm_connector *connector)
-{
-	struct ptn3460_bridge *ptn_bridge;
-	u8 *edid;
-	int ret, num_modes = 0;
-	bool power_off;
-
-	ptn_bridge = connector_to_ptn3460(connector);
-
-	if (ptn_bridge->edid)
-		return drm_add_edid_modes(connector, ptn_bridge->edid);
-
-	power_off = !ptn_bridge->enabled;
-	ptn3460_pre_enable(&ptn_bridge->bridge);
-
-	edid = kmalloc(EDID_LENGTH, GFP_KERNEL);
-	if (!edid) {
-		DRM_ERROR("Failed to allocate EDID\n");
-		return 0;
-	}
-
-	ret = ptn3460_read_bytes(ptn_bridge, PTN3460_EDID_ADDR, edid,
-			EDID_LENGTH);
-	if (ret) {
-		kfree(edid);
-		goto out;
-	}
-
-	ptn_bridge->edid = (struct edid *)edid;
-	drm_mode_connector_update_edid_property(connector, ptn_bridge->edid);
-
-	num_modes = drm_add_edid_modes(connector, ptn_bridge->edid);
-
-out:
-	if (power_off)
-		ptn3460_disable(&ptn_bridge->bridge);
-
-	return num_modes;
-}
-
-static struct drm_encoder *ptn3460_best_encoder(struct drm_connector *connector)
-{
-	struct ptn3460_bridge *ptn_bridge = connector_to_ptn3460(connector);
-
-	return ptn_bridge->bridge.encoder;
-}
-
-static struct drm_connector_helper_funcs ptn3460_connector_helper_funcs = {
-	.get_modes = ptn3460_get_modes,
-	.best_encoder = ptn3460_best_encoder,
-};
-
-static enum drm_connector_status ptn3460_detect(struct drm_connector *connector,
-		bool force)
-{
-	return connector_status_connected;
-}
-
-static void ptn3460_connector_destroy(struct drm_connector *connector)
-{
-	drm_connector_cleanup(connector);
-}
-
-static struct drm_connector_funcs ptn3460_connector_funcs = {
-	.dpms = drm_atomic_helper_connector_dpms,
-	.fill_modes = drm_helper_probe_single_connector_modes,
-	.detect = ptn3460_detect,
-	.destroy = ptn3460_connector_destroy,
-	.reset = drm_atomic_helper_connector_reset,
-	.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
-	.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
-};
-
-static int ptn3460_bridge_attach(struct drm_bridge *bridge)
-{
-	struct ptn3460_bridge *ptn_bridge = bridge_to_ptn3460(bridge);
-	int ret;
-
-	if (!bridge->encoder) {
-		DRM_ERROR("Parent encoder object not found");
-		return -ENODEV;
-	}
-
-	ptn_bridge->connector.polled = DRM_CONNECTOR_POLL_HPD;
-	ret = drm_connector_init(bridge->dev, &ptn_bridge->connector,
-			&ptn3460_connector_funcs, DRM_MODE_CONNECTOR_LVDS);
-	if (ret) {
-		DRM_ERROR("Failed to initialize connector with drm\n");
-		return ret;
-	}
-	drm_connector_helper_add(&ptn_bridge->connector,
-					&ptn3460_connector_helper_funcs);
-	drm_connector_register(&ptn_bridge->connector);
-	drm_mode_connector_attach_encoder(&ptn_bridge->connector,
-							bridge->encoder);
-
-	if (ptn_bridge->panel)
-		drm_panel_attach(ptn_bridge->panel, &ptn_bridge->connector);
-
-	drm_helper_hpd_irq_event(ptn_bridge->connector.dev);
-
-	return ret;
-}
-
-static struct drm_bridge_funcs ptn3460_bridge_funcs = {
-	.pre_enable = ptn3460_pre_enable,
-	.enable = ptn3460_enable,
-	.disable = ptn3460_disable,
-	.post_disable = ptn3460_post_disable,
-	.attach = ptn3460_bridge_attach,
-};
-
-static int ptn3460_probe(struct i2c_client *client,
-				const struct i2c_device_id *id)
-{
-	struct device *dev = &client->dev;
-	struct ptn3460_bridge *ptn_bridge;
-	struct device_node *endpoint, *panel_node;
-	int ret;
-
-	ptn_bridge = devm_kzalloc(dev, sizeof(*ptn_bridge), GFP_KERNEL);
-	if (!ptn_bridge) {
-		return -ENOMEM;
-	}
-
-	endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
-	if (endpoint) {
-		panel_node = of_graph_get_remote_port_parent(endpoint);
-		if (panel_node) {
-			ptn_bridge->panel = of_drm_find_panel(panel_node);
-			of_node_put(panel_node);
-			if (!ptn_bridge->panel)
-				return -EPROBE_DEFER;
-		}
-	}
-
-	ptn_bridge->client = client;
-
-	ptn_bridge->gpio_pd_n = devm_gpiod_get(&client->dev, "powerdown",
-					       GPIOD_OUT_HIGH);
-	if (IS_ERR(ptn_bridge->gpio_pd_n)) {
-		ret = PTR_ERR(ptn_bridge->gpio_pd_n);
-		dev_err(dev, "cannot get gpio_pd_n %d\n", ret);
-		return ret;
-	}
-
-	/*
-	 * Request the reset pin low to avoid the bridge being
-	 * initialized prematurely
-	 */
-	ptn_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset",
-						GPIOD_OUT_LOW);
-	if (IS_ERR(ptn_bridge->gpio_rst_n)) {
-		ret = PTR_ERR(ptn_bridge->gpio_rst_n);
-		DRM_ERROR("cannot get gpio_rst_n %d\n", ret);
-		return ret;
-	}
-
-	ret = of_property_read_u32(dev->of_node, "edid-emulation",
-			&ptn_bridge->edid_emulation);
-	if (ret) {
-		dev_err(dev, "Can't read EDID emulation value\n");
-		return ret;
-	}
-
-	ptn_bridge->bridge.funcs = &ptn3460_bridge_funcs;
-	ptn_bridge->bridge.of_node = dev->of_node;
-	ret = drm_bridge_add(&ptn_bridge->bridge);
-	if (ret) {
-		DRM_ERROR("Failed to add bridge\n");
-		return ret;
-	}
-
-	i2c_set_clientdata(client, ptn_bridge);
-
-	return 0;
-}
-
-static int ptn3460_remove(struct i2c_client *client)
-{
-	struct ptn3460_bridge *ptn_bridge = i2c_get_clientdata(client);
-
-	drm_bridge_remove(&ptn_bridge->bridge);
-
-	return 0;
-}
-
-static const struct i2c_device_id ptn3460_i2c_table[] = {
-	{"ptn3460", 0},
-	{},
-};
-MODULE_DEVICE_TABLE(i2c, ptn3460_i2c_table);
-
-static const struct of_device_id ptn3460_match[] = {
-	{ .compatible = "nxp,ptn3460" },
-	{},
-};
-MODULE_DEVICE_TABLE(of, ptn3460_match);
-
-static struct i2c_driver ptn3460_driver = {
-	.id_table	= ptn3460_i2c_table,
-	.probe		= ptn3460_probe,
-	.remove		= ptn3460_remove,
-	.driver		= {
-		.name	= "nxp,ptn3460",
-		.owner	= THIS_MODULE,
-		.of_match_table = ptn3460_match,
-	},
-};
-module_i2c_driver(ptn3460_driver);
-
-MODULE_AUTHOR("Sean Paul <seanpaul@chromium.org>");
-MODULE_DESCRIPTION("NXP ptn3460 eDP-LVDS converter driver");
-MODULE_LICENSE("GPL v2");