soc/mediatek/mt8183: Add display controller driver

The MT8183 SOC has a DISP (display controller) that supports
overlay, read/write DMA, ... etc. The output of DISP goes to
display interface DSI, DPI or DBI directly.

Reference: MT8183 Application Processor Functional Spec,
 6.1 Display Controller

BUG=b:80501386,b:117254947
BRANCH=none
TEST=Boots correctly on Kukui

Change-Id: Ic4aecc58d081f14f5d136b9ff8e813e6f40f78eb
Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/31478
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

4 files changed, 314 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8183/Makefile.inc b/src/soc/mediatek/mt8183/Makefile.inc
index 2a65c35ea3..45276835af 100644
--- a/src/soc/mediatek/mt8183/Makefile.inc
+++ b/src/soc/mediatek/mt8183/Makefile.inc
@@ -45,6 +45,7 @@ romstage-y += ../common/wdt.c
 
 ramstage-y += auxadc.c
 ramstage-y += ../common/cbmem.c emi.c
+ramstage-y += ../common/ddp.c ddp.c
 ramstage-y += ../common/gpio.c gpio.c
 ramstage-y += ../common/i2c.c i2c.c
 ramstage-y += ../common/mmu_operations.c mmu_operations.c
diff --git a/src/soc/mediatek/mt8183/ddp.c b/src/soc/mediatek/mt8183/ddp.c
new file mode 100644
index 0000000000..0ae0be1815
--- /dev/null
+++ b/src/soc/mediatek/mt8183/ddp.c
@@ -0,0 +1,103 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#include <device/mmio.h>
+#include <edid.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+#include <soc/addressmap.h>
+#include <soc/ddp.h>
+
+static void disp_config_main_path_connection(void)
+{
+	write32(&mmsys_cfg->disp_ovl0_mout_en, OVL0_MOUT_EN_OVL0_2L);
+	write32(&mmsys_cfg->disp_ovl0_2l_mout_en, OVL0_2L_MOUT_EN_DISP_PATH0);
+	write32(&mmsys_cfg->disp_path0_sel_in, DISP_PATH0_SEL_IN_OVL0_2L);
+	write32(&mmsys_cfg->disp_rdma0_sout_sel_in, RDMA0_SOUT_SEL_IN_COLOR);
+	write32(&mmsys_cfg->disp_dither0_mout_en, DITHER0_MOUT_EN_DISP_DSI0);
+	write32(&mmsys_cfg->dsi0_sel_in, DSI0_SEL_IN_DITHER0_MOUT);
+}
+
+static void disp_config_main_path_mutex(void)
+{
+	write32(&disp_mutex->mutex[0].mod, MUTEX_MOD_MAIN_PATH);
+
+	/* Clock source from DSI0 */
+	write32(&disp_mutex->mutex[0].ctl,
+		MUTEX_SOF_DSI0 | (MUTEX_SOF_DSI0 << 6));
+	write32(&disp_mutex->mutex[0].en, BIT(0));
+}
+
+static void ovl_bgclr_in_sel(u32 idx)
+{
+	setbits_le32(&disp_ovl[idx]->datapath_con, BIT(2));
+}
+
+static void enable_pq(struct disp_pq_regs *const regs, u32 width, u32 height,
+		      int enable_relay)
+{
+	write32(&regs->size, height << 16 | width);
+	if (enable_relay)
+		write32(&regs->cfg, PQ_RELAY_MODE);
+	write32(&regs->en, PQ_EN);
+}
+
+static void main_disp_path_setup(u32 width, u32 height, u32 vrefresh)
+{
+	u32 idx = 0;
+	u32 pixel_clk = width * height * vrefresh;
+
+	for (idx = 0; idx < MAIN_PATH_OVL_NR; idx++)
+		ovl_set_roi(idx, width, height, idx ? 0 : 0xff0000ff);
+
+	rdma_config(width, height, pixel_clk, 5 * KiB);
+	color_start(width, height);
+	enable_pq(disp_ccorr, width, height, 1);
+	enable_pq(disp_aal, width, height, 0);
+	enable_pq(disp_gamma, width, height, 0);
+	enable_pq(disp_dither, width, height, 1);
+	disp_config_main_path_connection();
+	disp_config_main_path_mutex();
+}
+
+static void disp_clock_on(void)
+{
+	clrbits_le32(&mmsys_cfg->mmsys_cg_con0, CG_CON0_DISP_ALL);
+
+	clrbits_le32(&mmsys_cfg->mmsys_cg_con1, CG_CON1_DISP_DSI0 |
+						CG_CON1_DISP_DSI0_INTERFACE);
+}
+
+void mtk_ddp_init(void)
+{
+	disp_clock_on();
+	/* Turn off M4U port. */
+	write32((void *)(SMI_LARB0 + SMI_LARB_NON_SEC_CON), 0);
+}
+
+void mtk_ddp_mode_set(const struct edid *edid)
+{
+	u32 fmt = OVL_INFMT_RGBA8888;
+	u32 bpp = edid->framebuffer_bits_per_pixel / 8;
+	u32 width = edid->mode.ha;
+	u32 height = edid->mode.va;
+	u32 vrefresh = edid->mode.refresh;
+
+	main_disp_path_setup(width, height, vrefresh);
+	rdma_start();
+	ovl_layer_config(fmt, bpp, width, height);
+	ovl_bgclr_in_sel(1);
+}
diff --git a/src/soc/mediatek/mt8183/include/soc/addressmap.h b/src/soc/mediatek/mt8183/include/soc/addressmap.h
index 5a4784d03d..bb44f9bb45 100644
--- a/src/soc/mediatek/mt8183/include/soc/addressmap.h
+++ b/src/soc/mediatek/mt8183/include/soc/addressmap.h
@@ -58,6 +58,19 @@ enum {
 	IOCFG_LT_BASE		= IO_PHYS + 0x01F20000,
 	IOCFG_TL_BASE		= IO_PHYS + 0x01F30000,
 	SSUSB_SIF_BASE		= IO_PHYS + 0x01F40300,
+	MMSYS_BASE		= IO_PHYS + 0x04000000,
+	DISP_OVL0_BASE		= IO_PHYS + 0x04008000,
+	DISP_OVL1_BASE		= IO_PHYS + 0x04009000,
+	DISP_OVL1_2L_BASE	= IO_PHYS + 0x0400A000,
+	DISP_RDMA0_BASE		= IO_PHYS + 0x0400B000,
+	DISP_RDMA1_BASE		= IO_PHYS + 0x0400C000,
+	DISP_COLOR0_BASE	= IO_PHYS + 0x0400E000,
+	DISP_CCORR0_BASE	= IO_PHYS + 0x0400F000,
+	DISP_AAL0_BASE		= IO_PHYS + 0x04010000,
+	DISP_GAMMA0_BASE	= IO_PHYS + 0x04011000,
+	DISP_DITHER0_BASE	= IO_PHYS + 0x04012000,
+	DISP_MUTEX_BASE		= IO_PHYS + 0x04016000,
+	SMI_LARB0		= IO_PHYS + 0x04017000,
 	SMI_BASE		= IO_PHYS + 0x04019000,
 };
 
diff --git a/src/soc/mediatek/mt8183/include/soc/ddp.h b/src/soc/mediatek/mt8183/include/soc/ddp.h
new file mode 100644
index 0000000000..479417c77e
--- /dev/null
+++ b/src/soc/mediatek/mt8183/include/soc/ddp.h
@@ -0,0 +1,197 @@
+/*
+ * This file is part of the coreboot project.
+ *
+ * Copyright 2019 MediaTek Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ */
+
+#ifndef _MT8183_SOC_DDP_H_
+#define _MT8183_SOC_DDP_H_
+
+#include <soc/addressmap.h>
+#include <soc/ddp_common.h>
+#include <types.h>
+
+#define MAIN_PATH_OVL_NR 2
+
+struct mmsys_cfg_regs {
+	u32 reserved_0x000[64];		/* 0x000 */
+	u32 mmsys_cg_con0;		/* 0x100 */
+	u32 mmsys_cg_set0;		/* 0x104 */
+	u32 mmsys_cg_clr0;		/* 0x108 */
+	u32 reserved_0x10C;		/* 0x10C */
+	u32 mmsys_cg_con1;		/* 0x110 */
+	u32 mmsys_cg_set1;		/* 0x114 */
+	u32 mmsys_cg_clr1;		/* 0x118 */
+	u32 reserved_0x11C[889];	/* 0x11C */
+	u32 disp_ovl0_mout_en;		/* 0xF00 */
+	u32 disp_ovl0_2l_mout_en;	/* 0xF04 */
+	u32 disp_ovl1_2l_mout_en;	/* 0xF08 */
+	u32 disp_dither0_mout_en;	/* 0xF0C */
+	u32 reserved_0xF10[5];		/* 0xF10 - 0xF20 */
+	u32 disp_path0_sel_in;		/* 0xF24 */
+	u32 reserved_0xF28;		/* 0xF28 */
+	u32 dsi0_sel_in;		/* 0xF2C */
+	u32 dpi0_sel_in;		/* 0xF30 */
+	u32 reserved_0xF34;		/* 0xF34 */
+	u32 disp_ovl0_2l_sel_in;	/* 0xF38 */
+	u32 reserved_0xF3C[5];		/* 0xF3C - 0xF4C */
+	u32 disp_rdma0_sout_sel_in;	/* 0xF50 */
+	u32 disp_rdma1_sout_sel_in;	/* 0xF54 */
+	u32 reserved_0xF58[3];		/* 0xF58 - 0xF60 */
+	u32 dpi0_sel_sout_sel_in;	/* 0xF64 */
+};
+
+check_member(mmsys_cfg_regs, mmsys_cg_con0, 0x100);
+check_member(mmsys_cfg_regs, dpi0_sel_sout_sel_in, 0xF64);
+static struct mmsys_cfg_regs *const mmsys_cfg =
+	(void *)MMSYS_BASE;
+
+
+/* DISP_REG_CONFIG_MMSYS_CG_CON0
+   Configures free-run clock gating 0
+	0: Enable clock
+	1: Clock gating  */
+enum {
+	CG_CON0_SMI_COMMON	= BIT(0),
+	CG_CON0_SMI_LARB0	= BIT(1),
+	CG_CON0_GALS_COMMON0	= BIT(3),
+	CG_CON0_GALS_COMMON1	= BIT(4),
+	CG_CON0_DISP_OVL0	= BIT(20),
+	CG_CON0_DISP_OVL0_2L	= BIT(21),
+	CG_CON0_DISP_OVL1_2L	= BIT(22),
+	CG_CON0_DISP_RDMA0	= BIT(23),
+	CG_CON0_DISP_RDMA1	= BIT(24),
+	CG_CON0_DISP_WDMA0	= BIT(25),
+	CG_CON0_DISP_COLOR0	= BIT(26),
+	CG_CON0_DISP_CCORR0	= BIT(27),
+	CG_CON0_DISP_AAL0	= BIT(28),
+	CG_CON0_DISP_GAMMA0	= BIT(29),
+	CG_CON0_DISP_DITHER0	= BIT(30),
+	CG_CON0_DISP_ALL	= CG_CON0_SMI_COMMON |
+				  CG_CON0_SMI_LARB0 |
+				  CG_CON0_GALS_COMMON0 |
+				  CG_CON0_GALS_COMMON1 |
+				  CG_CON0_DISP_OVL0 |
+				  CG_CON0_DISP_OVL0_2L |
+				  CG_CON0_DISP_RDMA0 |
+				  CG_CON0_DISP_COLOR0 |
+				  CG_CON0_DISP_CCORR0 |
+				  CG_CON0_DISP_AAL0 |
+				  CG_CON0_DISP_DITHER0 |
+				  CG_CON0_DISP_GAMMA0,
+	CG_CON0_ALL		= 0xffffffff
+};
+
+/* DISP_REG_CONFIG_MMSYS_CG_CON1
+   Configures free-run clock gating 1
+	0: Enable clock
+	1: Clock gating */
+enum {
+	CG_CON1_DISP_DSI0		= BIT(0),
+	CG_CON1_DISP_DSI0_INTERFACE	= BIT(1),
+	CG_CON1_DISP_26M		= BIT(7),
+
+	CG_CON1_ALL	      = 0xffffffff
+};
+
+enum {
+	OVL0_MOUT_EN_RDMA0		= BIT(0),
+	OVL0_MOUT_EN_OVL0_2L		= BIT(4),
+	OVL0_2L_MOUT_EN_DISP_PATH0	= BIT(0),
+	OVL1_2L_MOUT_EN_DISP_RDMA1	= BIT(4),
+	DITHER0_MOUT_EN_DISP_DSI0	= BIT(0),
+};
+
+enum {
+	DISP_PATH0_SEL_IN_OVL0     = 0,
+	DISP_PATH0_SEL_IN_OVL0_2L  = 1,
+	DSI0_SEL_IN_DITHER0_MOUT   = 0,
+	DSI0_SEL_IN_RDMA0	   = 1,
+	RDMA0_SOUT_SEL_IN_DSI0	   = 0,
+	RDMA0_SOUT_SEL_IN_COLOR    = 1,
+};
+
+struct disp_mutex_regs {
+	u32 inten;
+	u32 intsta;
+	u32 reserved0[6];
+	struct {
+		u32 en;
+		u32 dummy;
+		u32 rst;
+		u32 ctl;
+		u32 mod;
+		u32 reserved[3];
+	} mutex[12];
+};
+
+static struct disp_mutex_regs *const disp_mutex = (void *)DISP_MUTEX_BASE;
+
+enum {
+	MUTEX_MOD_DISP_RDMA0	= BIT(0),
+	MUTEX_MOD_DISP_RDMA1	= BIT(1),
+	MUTEX_MOD_DISP_OVL0	= BIT(9),
+	MUTEX_MOD_DISP_OVL0_2L	= BIT(10),
+	MUTEX_MOD_DISP_OVL1_2L	= BIT(11),
+	MUTEX_MOD_DISP_WDMA0	= BIT(12),
+	MUTEX_MOD_DISP_COLOR0	= BIT(13),
+	MUTEX_MOD_DISP_CCORR0	= BIT(14),
+	MUTEX_MOD_DISP_AAL0	= BIT(15),
+	MUTEX_MOD_DISP_GAMMA0	= BIT(16),
+	MUTEX_MOD_DISP_DITHER0	= BIT(17),
+	MUTEX_MOD_DISP_PWM0	= BIT(28),
+	MUTEX_MOD_MAIN_PATH	= MUTEX_MOD_DISP_OVL0 | MUTEX_MOD_DISP_OVL0_2L |
+				  MUTEX_MOD_DISP_RDMA0 | MUTEX_MOD_DISP_COLOR0 |
+				  MUTEX_MOD_DISP_CCORR0 | MUTEX_MOD_DISP_AAL0 |
+				  MUTEX_MOD_DISP_GAMMA0 |
+				  MUTEX_MOD_DISP_DITHER0,
+};
+
+enum {
+	MUTEX_SOF_SINGLE_MODE = 0,
+	MUTEX_SOF_DSI0 = 1,
+	MUTEX_SOF_DPI0 = 2,
+};
+
+struct disp_pq_regs {
+	u32 en;
+	u32 reset;
+	u32 inten;
+	u32 intsta;
+	u32 status;
+	u32 reserved0[3];
+	u32 cfg;
+	u32 reserved1[3];
+	u32 size;
+};
+
+enum {
+	PQ_EN		= BIT(0),
+	PQ_RELAY_MODE	= BIT(0),
+};
+
+static struct disp_pq_regs *const disp_ccorr = (void *)DISP_CCORR0_BASE;
+
+static struct disp_pq_regs *const disp_aal = (void *)DISP_AAL0_BASE;
+
+static struct disp_pq_regs *const disp_gamma = (void *)DISP_GAMMA0_BASE;
+
+static struct disp_pq_regs *const disp_dither = (void *)DISP_DITHER0_BASE;
+
+enum {
+	SMI_LARB_NON_SEC_CON	= 0x380,
+};
+
+void mtk_ddp_init(void);
+void mtk_ddp_mode_set(const struct edid *edid);
+
+#endif