From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Arnaud Patard <arnaud.patard@rtp-net.org>
Date: Wed, 8 Jul 2020 21:43:36 -0400
Subject: PBP: Fix panel reset

On warm reset, the pinebook pro panel is not working correctly.
The issue is not yet debugged so, for now, this hack seems to be
enough. It toggles the GPIO1_C6 gpio [ LCDVCC_EN signal in the
schematics ] used by the vcc3v3_panel regulator.

There's no gpio_request, since the gpio is already in use at this
stage, so it can only fail.

Origin: http://people.hupstream.com/~rtp/pbp/20200706/patches/hack-reset.patch
---
 board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c b/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
index 516292aaa5..ff9c916bcb 100644
--- a/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
+++ b/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
@@ -7,13 +7,15 @@
 #include <common.h>
 #include <dm.h>
 #include <syscon.h>
+#include <linux/delay.h>
+#include <asm/gpio.h>
 #include <asm/io.h>
 #include <asm/arch-rockchip/clock.h>
 #include <asm/arch-rockchip/grf_rk3399.h>
+#include <asm/arch-rockchip/gpio.h>
 #include <asm/arch-rockchip/hardware.h>
 #include <asm/arch-rockchip/misc.h>
 #include <power/regulator.h>
-
 #define GRF_IO_VSEL_BT565_SHIFT 0
 #define PMUGRF_CON0_VSEL_SHIFT 8
 
@@ -59,6 +61,7 @@ int misc_init_r(void)
 	const u32 cpuid_length = 0x10;
 	u8 cpuid[cpuid_length];
 	int ret;
+	unsigned int gpio;
 
 	setup_iodomain();
 
@@ -70,6 +73,11 @@ int misc_init_r(void)
 	if (ret)
 		return ret;
 
+	gpio_lookup_name("B22", NULL, NULL, &gpio);
+	gpio_direction_output(gpio, 0);
+	udelay(500000);
+	gpio_direction_output(gpio, 1);
+
 	return ret;
 }
 #endif
-- 
Armbian