misc: tegra_cec: turn on TV ASAP

Turn on the TV as soon as possible for better user experience
by sending <Text View On> and <ACTIVE SOURCE> CEC commands if
the previous reboot is not recovery. If the previous reboot
reason is recovery, don't send <Text View On> to avoid turning
on TV when there is an auto OTA on-going.

CEC driver uses RESERVED2 logical address as the source address.
Later, the upper layer will send OneTouchPlay command by using
its valid logical address.

Bug 200253563

Change-Id: Iecd759bb50c1f21549f55906e68e3faab905f86b
Signed-off-by: Chun XU <chunx@nvidia.com>
Reviewed-on: http://git-master/r/1277092
(cherry picked from commit 2beab2dcfc4e40712004500df99633d59ae0e70c)

drivers/misc/tegra-cec/tegra_cec.c

@@ -1,7 +1,7 @@
 /*
  * drivers/misc/tegra-cec/tegra_cec.c
  *
- * Copyright (c) 2012-2016, NVIDIA CORPORATION.  All rights reserved.
+ * Copyright (c) 2012-2017, NVIDIA CORPORATION.  All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,
@@ -42,6 +42,25 @@
 #include "tegra_cec.h"
 
 #include "../../../../display/drivers/video/tegra/dc/dc_priv.h"
+#include "../../../../display/drivers/video/tegra/dc/dc.h"
+
+#define LOGICAL_ADDRESS_RESERVED2 0xD
+#define LOGICAL_ADDRESS_TV 0x0
+#define LOGICAL_ADDRESS_BROADCAST 0xF
+#define TEXT_VIEW_ON 0x0D
+#define ACTIVE_SOURCE 0x82
+
+static bool previous_reboot_reason_is_recovery, text_view_on_sent;
+static u8 text_view_on_command[] = {
+	LOGICAL_ADDRESS_RESERVED2 << 4 | LOGICAL_ADDRESS_TV,
+	TEXT_VIEW_ON
+};
+static u8 active_source_command[] = {
+	LOGICAL_ADDRESS_RESERVED2 << 4 | LOGICAL_ADDRESS_BROADCAST,
+	ACTIVE_SOURCE,
+	0x00,
+	0x00
+};
 
 struct tegra_cec_soc {
 	int powergate_id;
@@ -293,6 +312,40 @@ static const struct file_operations tegra_cec_fops = {
 	.write = tegra_cec_write,
 };
 
+static int tegra_cec_send_one_touch_play(struct tegra_cec *cec)
+{
+	int res = 0;
+	u8 phy_address[2] = {0};
+
+	text_view_on_sent = true;
+
+	res = tegra_dc_get_source_physical_address(phy_address);
+	if (res) {
+		dev_warn(cec->dev, "Can't find physical addresse.\n");
+		return res;
+	}
+
+	dev_info(cec->dev, "physical address: %02x:%02x.\n",
+		phy_address[0], phy_address[1]);
+
+	active_source_command[2] = phy_address[0];
+	active_source_command[3] = phy_address[1];
+
+	mutex_lock(&cec->tx_lock);
+	res = tegra_cec_native_write_l(cec, text_view_on_command,
+		sizeof(text_view_on_command));
+	dev_notice(cec->dev, "Sent <Text View On> res: %d.\n", res);
+	if (!res) {
+		res = tegra_cec_native_write_l(cec, active_source_command,
+			sizeof(active_source_command));
+		dev_notice(cec->dev,
+			"Broadcast <Active Source> res: %d.\n", res);
+	}
+	mutex_unlock(&cec->tx_lock);
+
+	return res;
+}
+
 static void tegra_cec_init(struct tegra_cec *cec)
 {
 	cec->rx_wake = 0;
@@ -370,6 +423,8 @@ static void tegra_cec_init(struct tegra_cec *cec)
 	atomic_set(&cec->init_done, 1);
 	wake_up_interruptible(&cec->init_waitq);
 
+	if (!text_view_on_sent && !previous_reboot_reason_is_recovery)
+		tegra_cec_send_one_touch_play(cec);
 	dev_notice(cec->dev, "%s Done.\n", __func__);
 }
 
@@ -634,6 +689,18 @@ static int tegra_cec_resume(struct platform_device *pdev)
 }
 #endif
 
+static int __init check_previous_reboot_reason_is_recovery(char *options)
+{
+	previous_reboot_reason_is_recovery = true;
+
+	pr_info("tegra_cec: the previous_reboot_reason is%s recovery.\n",
+		previous_reboot_reason_is_recovery ? "" : " not");
+
+	return 0;
+}
+
+early_param("post_recovery", check_previous_reboot_reason_is_recovery);
+
 static struct tegra_cec_soc tegra210_soc_data = {
 	.powergate_id = TEGRA210_POWER_DOMAIN_DISA,
 };