soc/mediatek/mt8173: Remove dual DSI mode

The 'dual DSI mode' was never used by any real boards running coreboot
and is introducing lots of complexity when it comes to refactoring.

In order to create a common display stack for MTK SOCs, we want to first
drop dual DSI mode so 8173 and 8183 DSI/DDP implementation will be more
similar to each other.

BUG=b:80501386,b:117254947
TEST=emerge-oak coreboot

Change-Id: I357c30cc687803ca8045d0b055dec2e22eef4291
Signed-off-by: Hung-Te Lin <hungte@chromium.org>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34693
Reviewed-by: Julius Werner <jwerner@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

2 files changed, 3 insertions, 9 deletions

diff --git a/src/soc/mediatek/mt8173/include/soc/ddp.h b/src/soc/mediatek/mt8173/include/soc/ddp.h
index 0bd832e90f..2f154ddb67 100644
--- a/src/soc/mediatek/mt8173/include/soc/ddp.h
+++ b/src/soc/mediatek/mt8173/include/soc/ddp.h
@@ -407,12 +407,6 @@ enum {
 	UFO_LR = BIT(3) | BIT(0),
 };
 
-struct disp_split_regs {
-	u32 start;
-};
-
-static struct disp_split_regs *const disp_split = (void *)DISP_SPLIT1_BASE;
-
 struct disp_color_regs {
 	u8 reserved0[1024];
 	u32 cfg_main;
@@ -452,7 +446,7 @@ enum OVL_INPUT_FORMAT {
 	OVL_INFMT_ABGR8888 = OVL_INFMT_ARGB8888 + OVL_COLOR_BASE,
 };
 
-void mtk_ddp_init(bool dual_dsi_mode);
-void mtk_ddp_mode_set(const struct edid *edid, bool dual_dsi_mode);
+void mtk_ddp_init(void);
+void mtk_ddp_mode_set(const struct edid *edid);
 
 #endif
diff --git a/src/soc/mediatek/mt8173/include/soc/dsi.h b/src/soc/mediatek/mt8173/include/soc/dsi.h
index ca35bd1759..967ed4d27e 100644
--- a/src/soc/mediatek/mt8173/include/soc/dsi.h
+++ b/src/soc/mediatek/mt8173/include/soc/dsi.h
@@ -443,7 +443,7 @@ enum {
 };
 
 int mtk_dsi_init(u32 mode_flags, enum mipi_dsi_pixel_format format, u32 lanes,
-		 bool dual_dsi_mode, const struct edid *edid);
+		 const struct edid *edid);
 void mtk_dsi_pin_drv_ctrl(void);
 
 #endif