From 86ef31fcb116682d399b9723a7ab66c87e6f2cc5 Mon Sep 17 00:00:00 2001
From: Stephen Graf <stephen.graf@gmail.com>
Date: Tue, 18 Feb 2025 05:12:44 +0000
Subject: add TCON global control reg for pad selection

Signed-off-by: Stephen Graf <stephen.graf@gmail.com>
---
 drivers/gpu/drm/sun4i/sun4i_tcon.c | 4 ++++
 drivers/gpu/drm/sun4i/sun4i_tcon.h | 1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c
index af67bf2e6e09..88984572f5c5 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.c
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c
@@ -1308,6 +1308,10 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master,
 		goto err_free_dclk;
 	}
 
+	regmap_update_bits(tcon->regs, SUN4I_TCON_GCTL_REG,
+		           SUN4I_TCON_GCTL_PAD_SEL,
+		           SUN4I_TCON_GCTL_PAD_SEL);
+
 	if (tcon->quirks->has_channel_0) {
 		/*
 		 * If we have an LVDS panel connected to the TCON, we should
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.h b/drivers/gpu/drm/sun4i/sun4i_tcon.h
index bd4abc90062b..e8d28bad4060 100644
--- a/drivers/gpu/drm/sun4i/sun4i_tcon.h
+++ b/drivers/gpu/drm/sun4i/sun4i_tcon.h
@@ -19,6 +19,7 @@
 
 #define SUN4I_TCON_GCTL_REG			0x0
 #define SUN4I_TCON_GCTL_TCON_ENABLE			BIT(31)
+#define SUN4I_TCON_GCTL_PAD_SEL				BIT(1)
 #define SUN4I_TCON_GCTL_IOMAP_MASK			BIT(0)
 #define SUN4I_TCON_GCTL_IOMAP_TCON1			(1 << 0)
 #define SUN4I_TCON_GCTL_IOMAP_TCON0			(0 << 0)
-- 
2.35.3

