63 lines
1.8 KiB
Diff
63 lines
1.8 KiB
Diff
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From 352cb7b28bf4a16330f148043e8d10b0141bbfcb Mon Sep 17 00:00:00 2001
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From: Arnaud Patard <arnaud.patard@rtp-net.org>
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Date: Wed, 8 Jul 2020 21:43:36 -0400
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Subject: [PATCH 4/4] PBP: Fix panel reset
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On warm reset, the pinebook pro panel is not working correctly.
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The issue is not yet debugged so, for now, this hack seems to be
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enough. It toggles the GPIO1_C6 gpio [ LCDVCC_EN signal in the
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schematics ] used by the vcc3v3_panel regulator.
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There's no gpio_request, since the gpio is already in use at this
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stage, so it can only fail.
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Origin: http://people.hupstream.com/~rtp/pbp/20200706/patches/hack-reset.patch
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---
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board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c | 10 +++++++++-
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1 file changed, 9 insertions(+), 1 deletion(-)
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diff --git a/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c b/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
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index 516292aaa59..ff9c916bcb7 100644
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--- a/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
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+++ b/board/pine64/pinebook-pro-rk3399/pinebook-pro-rk3399.c
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@@ -7,13 +7,15 @@
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#include <common.h>
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#include <dm.h>
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#include <syscon.h>
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+#include <linux/delay.h>
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+#include <asm/gpio.h>
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#include <asm/io.h>
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#include <asm/arch-rockchip/clock.h>
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#include <asm/arch-rockchip/grf_rk3399.h>
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+#include <asm/arch-rockchip/gpio.h>
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#include <asm/arch-rockchip/hardware.h>
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#include <asm/arch-rockchip/misc.h>
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#include <power/regulator.h>
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-
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#define GRF_IO_VSEL_BT565_SHIFT 0
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#define PMUGRF_CON0_VSEL_SHIFT 8
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@@ -59,6 +61,7 @@ int misc_init_r(void)
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const u32 cpuid_length = 0x10;
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u8 cpuid[cpuid_length];
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int ret;
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+ unsigned int gpio;
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setup_iodomain();
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@@ -70,6 +73,11 @@ int misc_init_r(void)
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if (ret)
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return ret;
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+ gpio_lookup_name("B22", NULL, NULL, &gpio);
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+ gpio_direction_output(gpio, 0);
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+ udelay(500000);
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+ gpio_direction_output(gpio, 1);
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+
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return ret;
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}
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#endif
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--
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2.25.4
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