soc/mediatek/mt8188: Add support for MIPI panel

We need to add DSI and MIPI_TX settings to support MIPI panel.

BUG=b:244208960
TEST=emerge-geralt coreboot

Change-Id: Ib430939b4fa2d517d006b4c23d399754ef4583ff
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/70184
Reviewed-by: Yidi Lin <yidilin@google.com>
Reviewed-by: Yu-Ping Wu <yupingso@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/mediatek/mt8188/Makefile.inc

@@ -39,6 +39,7 @@ ramstage-y += ../common/dfd.c
 ramstage-y += ../common/dp/dp_intf.c ../common/dp/dptx.c ../common/dp/dptx_hal.c dp_intf.c
 ramstage-y += ../common/dpm.c
 ramstage-$(CONFIG_DPM_FOUR_CHANNEL) += ../common/dpm_4ch.c
+ramstage-y += ../common/dsi.c ../common/mtk_mipi_dphy.c
 ramstage-y += ../common/emi.c
 ramstage-y += ../common/mcu.c
 ramstage-y += ../common/mcupm.c

src/soc/mediatek/mt8188/include/soc/addressmap.h

@@ -77,6 +77,7 @@ enum {
 	I2C3_BASE		= IO_PHYS + 0x01282000,
 	SFLASH_REG_BASE		= IO_PHYS + 0x0132C000,
 	IOCFG_RM_BASE		= IO_PHYS + 0x01C00000,
+	MIPITX_BASE		= IO_PHYS + 0x01C80000,
 	I2C1_BASE		= IO_PHYS + 0x01E00000,
 	I2C4_BASE		= IO_PHYS + 0x01E01000,
 	IOCFG_LT_BASE		= IO_PHYS + 0x01E10000,
@@ -95,6 +96,7 @@ enum {
 	DISP_AAL0_BASE		= IO_PHYS + 0x0C005000,
 	DISP_GAMMA0_BASE	= IO_PHYS + 0x0C006000,
 	DISP_DITHER0_BASE	= IO_PHYS + 0x0C007000,
+	DSI0_BASE		= IO_PHYS + 0x0C008000,
 	DISP_OVL1_BASE		= IO_PHYS + 0x0C00A000,
 	DP_INTF0_BASE		= IO_PHYS + 0x0C015000,
 	DISP_MUTEX_BASE		= IO_PHYS + 0x0C016000,

src/soc/mediatek/mt8188/include/soc/dsi.h

@@ -0,0 +1,56 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef SOC_MEDIATEK_MT8188_DSI_H
+#define SOC_MEDIATEK_MT8188_DSI_H
+
+#include <soc/dsi_common.h>
+#include <soc/dsi_register_v2.h>
+
+/* DSI features */
+#define MTK_DSI_MIPI_RATIO_NUMERATOR	100
+#define MTK_DSI_MIPI_RATIO_DENOMINATOR	100
+#define MTK_DSI_DATA_RATE_MIN_MHZ	125
+#define MTK_DSI_HAVE_SIZE_CON		1
+#define PIXEL_STREAM_CUSTOM_HEADER	0xb
+
+/* MIPITX is SOC specific and cannot live in common. */
+
+/* MIPITX_REG */
+struct mipi_tx_regs {
+	u32 reserved0[3];
+	u32 lane_con;
+	u32 reserved1[6];
+	u32 pll_pwr;
+	u32 pll_con0;
+	u32 pll_con1;
+	u32 pll_con2;
+	u32 pll_con3;
+	u32 pll_con4;
+	u32 reserved2[65];
+	u32 d2_sw_ctl_en;
+	u32 reserved3[63];
+	u32 d0_sw_ctl_en;
+	u32 reserved4[56];
+	u32 ck_ckmode_en;
+	u32 reserved5[6];
+	u32 ck_sw_ctl_en;
+	u32 reserved6[63];
+	u32 d1_sw_ctl_en;
+	u32 reserved7[63];
+	u32 d3_sw_ctl_en;
+};
+
+check_member(mipi_tx_regs, pll_con4, 0x3c);
+check_member(mipi_tx_regs, d3_sw_ctl_en, 0x544);
+static struct mipi_tx_regs *const mipi_tx = (void *)MIPITX_BASE;
+
+/* Register values */
+#define DSI_CK_CKMODE_EN	BIT(0)
+#define DSI_SW_CTL_EN		BIT(0)
+#define AD_DSI_PLL_SDM_PWR_ON	BIT(0)
+#define AD_DSI_PLL_SDM_ISO_EN	BIT(1)
+
+#define RG_DSI_PLL_EN		BIT(4)
+#define RG_DSI_PLL_POSDIV	(0x7 << 8)
+
+#endif