soc/mediatek/mt8173: Refactor display driver to share common parts

Move those will be shared by other MTK SOCs (for example, MT8183) to
common/ddp.c.

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

Change-Id: Ie5709ab6e263caa21fdf7e799dc2ee884ffaf800
Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/34515
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Julius Werner <jwerner@chromium.org>

2 files changed, 239 insertions, 0 deletions

diff --git a/src/soc/mediatek/common/ddp.c b/src/soc/mediatek/common/ddp.c
new file mode 100644
index 0000000000..173fa90cd7
--- /dev/null
+++ b/src/soc/mediatek/common/ddp.c
@@ -0,0 +1,82 @@
+/*
+ * 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 <stddef.h>
+#include <soc/addressmap.h>
+#include <soc/ddp.h>
+
+#define RDMA_FIFO_PSEUDO_SIZE(bytes)            (((bytes) / 16) << 16)
+#define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes) ((bytes) / 16)
+
+void ovl_set_roi(u32 idx, u32 width, u32 height, u32 color)
+{
+	write32(&disp_ovl[idx]->roi_size, height << 16 | width);
+	write32(&disp_ovl[idx]->roi_bgclr, color);
+}
+
+void rdma_start(void)
+{
+	setbits_le32(&disp_rdma0->global_con, RDMA_ENGINE_EN);
+}
+
+void rdma_config(u32 width, u32 height, u32 pixel_clk, u32 fifo_size)
+{
+	u32 threshold;
+	u32 reg;
+
+	clrsetbits_le32(&disp_rdma0->size_con_0, 0x1FFF, width);
+	clrsetbits_le32(&disp_rdma0->size_con_1, 0xFFFFF, height);
+
+	/*
+	 * Enable FIFO underflow since DSI and DPI can't be blocked. Set the
+	 * output threshold to 6 microseconds with 7/6 overhead to account for
+	 * blanking, and with a pixel depth of 4 bytes:
+	 */
+	threshold = pixel_clk * 4 * 7 / 1000;
+
+	if (threshold > fifo_size)
+		threshold = fifo_size;
+
+	reg = RDMA_FIFO_UNDERFLOW_EN | RDMA_FIFO_PSEUDO_SIZE(fifo_size) |
+	      RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
+
+	write32(&disp_rdma0->fifo_con, reg);
+}
+
+void color_start(u32 width, u32 height)
+{
+
+	write32(&disp_color0->width, width);
+	write32(&disp_color0->height, height);
+	write32(&disp_color0->cfg_main, COLOR_BYPASS_ALL | COLOR_SEQ_SEL);
+	write32(&disp_color0->start, BIT(0));
+}
+
+void ovl_layer_config(u32 fmt, u32 bpp, u32 width, u32 height)
+{
+	struct disp_ovl_regs *const ovl0 = disp_ovl[0];
+	write32(&ovl0->layer[0].con, fmt << 12);
+	write32(&ovl0->layer[0].src_size, height << 16 | width);
+	write32(&ovl0->layer[0].pitch, (width * bpp) & 0xFFFF);
+
+	/* Enable layer */
+	write32(&ovl0->rdma[0].ctrl, BIT(0));
+	write32(&ovl0->rdma[0].mem_gmc_setting, RDMA_MEM_GMC);
+
+	setbits_le32(&ovl0->src_con, BIT(0));
+}
diff --git a/src/soc/mediatek/common/include/soc/ddp_common.h b/src/soc/mediatek/common/include/soc/ddp_common.h
new file mode 100644
index 0000000000..6d00ea3c75
--- /dev/null
+++ b/src/soc/mediatek/common/include/soc/ddp_common.h
@@ -0,0 +1,157 @@
+/*
+ * 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 _DDP_COMMON_H_
+#define _DDP_COMMON_H_
+
+#include <soc/addressmap.h>
+#include <types.h>
+
+
+struct disp_ovl_regs {
+	u32 sta;
+	u32 inten;
+	u32 intsta;
+	u32 en;
+	u32 trig;
+	u32 rst;
+	u8 reserved0[8];
+	u32 roi_size;
+	u32 datapath_con;
+	u32 roi_bgclr;
+	u32 src_con;
+	struct {
+		u32 con;
+		u32 srckey;
+		u32 src_size;
+		u32 offset;
+		u32 reserved0;
+		u32 pitch;
+		u32 reserved1[2];
+	} layer[4];
+	u8 reserved8[16];
+	struct {
+		u32 ctrl;
+		u32 mem_start_trig;
+		u32 mem_gmc_setting;
+		u32 mem_slow_con;
+		u32 fifo_ctrl;
+		u8 reserved[12];
+	} rdma[4];
+	u8 reserved12[148];
+	u32 debug_mon_sel;
+	u8 reserved13[8];
+	u32 rdma_mem_gmc_setting2[4];
+	u8 reserved14[16];
+	u32 dummy;
+	u8 reserved15[60];
+	u32 flow_ctrl_dbg;
+	u32 addcon_dbg;
+	u32 outmux_dbg;
+	u32 rdma_dbg[4];
+	u8 reserved16[3300];
+	u32 l0_addr;
+	u8 reserved17[28];
+	u32 l1_addr;
+	u8 reserved18[28];
+	u32 l2_addr;
+	u8 reserved19[28];
+	u32 l3_addr;
+};
+
+check_member(disp_ovl_regs, l3_addr, 0xFA0);
+static struct disp_ovl_regs *const disp_ovl[2] = {
+	(void *)DISP_OVL0_BASE, (void *)DISP_OVL1_BASE
+};
+
+struct disp_rdma_regs {
+	u32 int_enable;
+	u32 int_status;
+	u8 reserved0[8];
+	u32 global_con;
+	u32 size_con_0;
+	u32 size_con_1;
+	u32 target_line;
+	u8 reserved1[4];
+	u32 mem_con;
+	u32 mem_start_addr;
+	u32 mem_src_pitch;
+	u32 mem_gmc_setting_0;
+	u32 mem_slow_con;
+	u32 mem_gmc_setting_1;
+	u8 reserved2[4];
+	u32 fifo_con;
+	u8 reserved3[16];
+	u32 cf[3][3];
+	u32 cf_pre_add[3];
+	u32 cf_post_add[3];
+	u32 dummy;
+	u32 debug_out_sel;
+};
+
+enum {
+	RDMA_ENGINE_EN		= BIT(0),
+	RDMA_FIFO_UNDERFLOW_EN	= BIT(31),
+	RDMA_MEM_GMC = 0x40402020,
+};
+
+check_member(disp_rdma_regs, debug_out_sel, 0x94);
+static struct disp_rdma_regs *const disp_rdma0 = (void *)DISP_RDMA0_BASE;
+
+struct disp_color_regs {
+	u8 reserved0[1024];
+	u32 cfg_main;
+	u8 reserved1[2044];
+	u32 start;
+	u8 reserved2[76];
+	u32 width;
+	u32 height;
+};
+
+check_member(disp_color_regs, cfg_main, 0x400);
+check_member(disp_color_regs, start, 0xC00);
+check_member(disp_color_regs, width, 0xC50);
+check_member(disp_color_regs, height, 0xC54);
+static struct disp_color_regs *const disp_color0 = (void *)DISP_COLOR0_BASE;
+
+
+enum {
+	COLOR_BYPASS_ALL = BIT(7),
+	COLOR_SEQ_SEL    = BIT(13),
+};
+
+enum OVL_INPUT_FORMAT {
+	OVL_INFMT_RGB565 = 0,
+	OVL_INFMT_RGB888 = 1,
+	OVL_INFMT_RGBA8888 = 2,
+	OVL_INFMT_ARGB8888 = 3,
+	OVL_INFMT_UYVY = 4,
+	OVL_INFMT_YUYV = 5,
+	OVL_INFMT_UNKNOWN = 16,
+
+	OVL_COLOR_BASE = 30,
+	OVL_INFMT_BGR565 = OVL_INFMT_RGB565 + OVL_COLOR_BASE,
+	OVL_INFMT_BGR888 = OVL_INFMT_RGB888 + OVL_COLOR_BASE,
+	OVL_INFMT_BGRA8888 = OVL_INFMT_RGBA8888 + OVL_COLOR_BASE,
+	OVL_INFMT_ABGR8888 = OVL_INFMT_ARGB8888 + OVL_COLOR_BASE,
+};
+
+void ovl_set_roi(u32 idx, u32 width, u32 height, u32 color);
+void rdma_start(void);
+void rdma_config(u32 width, u32 height, u32 pixel_clk, u32 fifo_size);
+void color_start(u32 width, u32 height);
+void ovl_layer_config(u32 fmt, u32 bpp, u32 width, u32 height);
+
+#endif