From 45d06599927825fe1fa3c374508d6d0c8c9f9f52 Mon Sep 17 00:00:00 2001
From: Jernej Skrabec <jernej.skrabec@gmail.com>
Date: Sun, 29 Sep 2024 22:04:48 +1300
Subject: drm: sun4i: de2/de3: add generic blender register reference function

The DE2 and DE3 engines have a blender register range within the
mixer engine register map, whereas the DE33 separates this out into
a separate display group.

Prepare for this by adding a function to look the blender reference up,
with a subsequent patch to add a conditional based on the DE type.

Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Signed-off-by: Ryan Walklin <ryan@testtoast.com>
---
 drivers/gpu/drm/sun4i/sun8i_mixer.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/sun4i/sun8i_mixer.h b/drivers/gpu/drm/sun4i/sun8i_mixer.h
index 82956cb97cfd..75facc7d1fa6 100644
--- a/drivers/gpu/drm/sun4i/sun8i_mixer.h
+++ b/drivers/gpu/drm/sun4i/sun8i_mixer.h
@@ -224,6 +224,12 @@ sun8i_blender_base(struct sun8i_mixer *mixer)
 	return mixer->cfg->de_type == sun8i_mixer_de3 ? DE3_BLD_BASE : DE2_BLD_BASE;
 }
 
+static inline struct regmap *
+sun8i_blender_regmap(struct sun8i_mixer *mixer)
+{
+	return mixer->engine.regs;
+}
+
 static inline u32
 sun8i_channel_base(struct sun8i_mixer *mixer, int channel)
 {
-- 
2.35.3

