soc/mediatek/mt8195: Add ddp driver to support eDP output

Add ddp (display controller) driver that supports overlay, read/write
DMA, etc. The output goes to display interface DP_INTF0 directly.
Add ddp gclast and output_clamp settings on mt8195 to support
multi-layer display.

BUG=b:189985956

Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>
Change-Id: I9d5dd1025c4766218c2b1d86b9b1f97f2eab53d6
Reviewed-on: https://review.coreboot.org/c/coreboot/+/55509
Reviewed-by: Hung-Te Lin <hungte@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

3 files changed, 553 insertions, 0 deletions

diff --git a/src/soc/mediatek/mt8195/Makefile.inc b/src/soc/mediatek/mt8195/Makefile.inc
index ae5bca046a..e75455f416 100644
--- a/src/soc/mediatek/mt8195/Makefile.inc
+++ b/src/soc/mediatek/mt8195/Makefile.inc
@@ -48,6 +48,7 @@ romstage-y += ../common/mt6359p.c mt6359p.c
 romstage-y += ../common/rtc.c ../common/rtc_osc_init.c ../common/rtc_mt6359p.c
 
 ramstage-y += ../common/auxadc.c
+ramstage-y += ../common/ddp.c ddp.c
 ramstage-y += emi.c
 ramstage-y += ../common/flash_controller.c
 ramstage-y += ../common/gpio.c gpio.c
diff --git a/src/soc/mediatek/mt8195/ddp.c b/src/soc/mediatek/mt8195/ddp.c
new file mode 100644
index 0000000000..63fd011e95
--- /dev/null
+++ b/src/soc/mediatek/mt8195/ddp.c
@@ -0,0 +1,180 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#include <console/console.h>
+#include <device/mmio.h>
+#include <edid.h>
+#include <soc/addressmap.h>
+#include <soc/ddp.h>
+
+#define MERGE_MODE	6
+#define MERGE_SWAP	0
+
+static void disp_config_main_path_connection(void)
+{
+	/* ovl0 */
+	write32(&mmsys_cfg->mmsys_ovl_mout_en,
+		DISP_OVL0_TO_DISP_RDMA0);
+	write32(&mmsys_cfg->mmsys_sel_in,
+		SEL_IN_DSC_WRAP0_IN_FROM_DISP_DITHER0 |
+		SEL_IN_VPP_MERGE_FROM_DSC_WRAP0_OUT |
+		SEL_IN_DP_INTF0_FROM_VPP_MERGE);
+	write32(&mmsys_cfg->mmsys_sel_out,
+		SEL_OUT_DISP_DITHER0_TO_DSC_WRAP0_IN |
+		SEL_OUT_DSC_WRAP0_OUT_TO_VPP_MERGE |
+		SEL_OUT_VPP_MERGE_TO_DP_INTF0);
+}
+
+static void disp_config_main_path_mutex(void)
+{
+	write32(&disp_mutex->mutex[0].mod, MUTEX_MOD_MAIN_PATH);
+
+	/* Clock source from DP_INTF0 */
+	write32(&disp_mutex->mutex[0].ctl,
+		MUTEX_SOF_DP_INTF0 | (MUTEX_SOF_DP_INTF0 << 7));
+	write32(&disp_mutex->mutex[0].en, BIT(0));
+}
+
+static void ovl_bgclr_in_sel(u32 idx)
+{
+	setbits32(&disp_ovl[idx]->datapath_con, BIT(2));
+}
+
+static void ovl_layer_smi_id_en(u32 idx)
+{
+	setbits32(&disp_ovl[idx]->datapath_con, BIT(0));
+}
+
+static void ovl_layer_gclast_en(u32 idx)
+{
+	setbits32(&disp_ovl[idx]->datapath_con, BIT(24));
+	setbits32(&disp_ovl[idx]->datapath_con, BIT(25));
+}
+
+static void ovl_layer_output_clamp_en(u32 idx)
+{
+	setbits32(&disp_ovl[idx]->datapath_con, BIT(26));
+}
+
+static void ccorr_config(u32 width, u32 height)
+{
+	struct disp_ccorr_regs *const regs = disp_ccorr;
+
+	write32(&regs->size, width << 16 | height);
+	clrsetbits32(&regs->cfg, PQ_ENGINE_EN, PQ_RELAY_MODE);
+	write32(&regs->en, PQ_EN);
+}
+
+static void aal_config(u32 width, u32 height)
+{
+	struct disp_aal_regs *const regs = disp_aal;
+
+	write32(&regs->size, width << 16 | height);
+	write32(&regs->output_size, width << 16 | height);
+	clrsetbits32(&regs->cfg, PQ_ENGINE_EN, PQ_RELAY_MODE);
+	write32(&regs->en, PQ_EN);
+}
+
+static void gamma_config(u32 width, u32 height)
+{
+	struct disp_gamma_regs *const regs = disp_gamma;
+
+	write32(&regs->size, width << 16 | height);
+	setbits32(&regs->cfg, PQ_RELAY_MODE);
+	write32(&regs->en, PQ_EN);
+}
+
+static void dither_config(u32 width, u32 height)
+{
+	struct disp_dither_regs *const regs = disp_dither;
+	write32(&regs->size, width << 16 | height);
+	setbits32(&regs->cfg, PQ_RELAY_MODE);
+	write32(&regs->en, PQ_EN);
+}
+
+static void dsc_config(void)
+{
+	struct disp_dsc_regs *const regs = disp_dsc;
+
+	/* Enable dsc bypass mode. */
+	write32(&regs->con, DISP_DSC0_CON);
+}
+
+static void merge_config(u32 width, u32 height)
+{
+	struct disp_merge_regs *const regs = disp_merge;
+
+	write32(&regs->cfg0, height << 16 | width);
+	write32(&regs->cfg4, height << 16 | width);
+	write32(&regs->cfg25, height << 16 | width);
+	setbits32(&regs->cfg10, MERGE_SWAP);
+	setbits32(&regs->cfg12, MERGE_MODE);
+	write32(&regs->en, 0x1);
+}
+
+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);
+		ovl_layer_smi_id_en(idx);
+		ovl_layer_gclast_en(idx);
+		ovl_layer_output_clamp_en(idx);
+	}
+
+	rdma_config(width, height, pixel_clk, 5 * KiB);
+	color_start(width, height);
+	ccorr_config(width, height);
+	aal_config(width, height);
+	gamma_config(width, height);
+	dither_config(width, height);
+	dsc_config();
+	merge_config(width, height);
+	disp_config_main_path_connection();
+	disp_config_main_path_mutex();
+}
+
+static void disp_clock_on(void)
+{
+	clrbits32(&mmsys_cfg->mmsys_cg_con0, CG_CON0_DISP_ALL);
+	clrbits32(&mmsys_cfg->mmsys_cg_con1, CG_CON1_DISP_ALL);
+	clrbits32(&mmsys_cfg->mmsys_cg_con2, CG_CON2_DISP_ALL);
+}
+
+void mtk_ddp_init(void)
+{
+	disp_clock_on();
+
+	/* Turn off M4U port. */
+	write32((void *)(SMI_LARB0 + SMI_LARB_PORT_L0_OVL_RDMA0), 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;
+
+	printk(BIOS_DEBUG, "%s: display resolution: %dx%d@%d bpp %d\n",
+	       __func__, width, height, vrefresh, bpp);
+
+	if (!vrefresh) {
+		if (!width || !height)
+			vrefresh = 60;
+		else
+			vrefresh = edid->mode.pixel_clock * 1000 /
+				   ((width + edid->mode.hbl) *
+				    (height + edid->mode.vbl));
+
+		printk(BIOS_WARNING, "%s: vrefresh is not provided; using %d\n",
+		       __func__, vrefresh);
+	}
+
+	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/mt8195/include/soc/ddp.h b/src/soc/mediatek/mt8195/include/soc/ddp.h
new file mode 100644
index 0000000000..d51c0facf8
--- /dev/null
+++ b/src/soc/mediatek/mt8195/include/soc/ddp.h
@@ -0,0 +1,372 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+
+#ifndef _SOC_MEDIATEK_MT8195_DDP_H_
+#define _SOC_MEDIATEK_MT8195_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;		/* 0x11C */
+	u32 mmsys_cg_con2;		/* 0x120 */
+	u32 mmsys_cg_set2;		/* 0x124 */
+	u32 mmsys_cg_clr2;		/* 0x128 */
+	u32 reserved_0x12c[885];	/* 0x12C */
+	u32 reserved_0xf00;		/* 0xF00 */
+	u32 reserved_0xf04;		/* 0xF04 */
+	u32 reserved_0xf08;		/* 0xF08 */
+	u32 reserved_0xf0c;		/* 0xF0C */
+	u32 reserved_0xf10;		/* 0xF10 */
+	u32 mmsys_ovl_mout_en;		/* 0xF14 */
+	u32 reserved_0xf18;		/* 0xF18 */
+	u32 reserved_0xf1c;		/* 0xF1C */
+	u32 reserved_0xf20;		/* 0xF20 */
+	u32 reserved_0xf24;		/* 0xF24 */
+	u32 reserved_0xf28;		/* 0xF28 */
+	u32 reserved_0xf2c;		/* 0xF2C */
+	u32 reserved_0xf30;		/* 0xF30 */
+	u32 mmsys_sel_in;		/* 0xF34 */
+	u32 mmsys_sel_out;		/* 0xF38 */
+	u32 reserved_0xf3c;		/* 0xF3C */
+	u32 reserved_0xf40;		/* 0xF40 */
+};
+
+check_member(mmsys_cfg_regs, mmsys_cg_con0, 0x100);
+check_member(mmsys_cfg_regs, mmsys_cg_con1, 0x110);
+check_member(mmsys_cfg_regs, mmsys_cg_con2, 0x120);
+check_member(mmsys_cfg_regs, mmsys_ovl_mout_en, 0xF14);
+static struct mmsys_cfg_regs *const mmsys_cfg = (void *)VDOSYS0_BASE;
+
+/* DISP_REG_CONFIG_MMSYS_CG_CON0
+   Configures free-run vdo0_clks gating 0
+	0: Enable clock
+	1: Clock gating  */
+enum {
+	CG_CON0_DISP_OVL0	= BIT(0),
+	CG_CON0_DISP_COLOR0	= BIT(2),
+	CG_CON0_DISP_CCORR0	= BIT(4),
+	CG_CON0_DISP_AAL0	= BIT(6),
+	CG_CON0_DISP_GAMMA0	= BIT(8),
+	CG_CON0_DISP_DITHER0	= BIT(10),
+	CG_CON0_DISP_RDMA0	= BIT(19),
+	CG_CON0_DISP_DSC_WRAP0	= BIT(23),
+	CG_CON0_DISP_VPP_MERGE0	= BIT(24),
+	CG_CON0_DISP_DP_INTF0	= BIT(25),
+	CG_CON0_DISP_MUTEX0	= BIT(26),
+
+	CG_CON0_DISP_ALL	= CG_CON0_DISP_MUTEX0 |
+				  CG_CON0_DISP_OVL0 |
+				  CG_CON0_DISP_RDMA0 |
+				  CG_CON0_DISP_COLOR0 |
+				  CG_CON0_DISP_CCORR0 |
+				  CG_CON0_DISP_AAL0 |
+				  CG_CON0_DISP_GAMMA0 |
+				  CG_CON0_DISP_DITHER0 |
+				  CG_CON0_DISP_DSC_WRAP0 |
+				  CG_CON0_DISP_VPP_MERGE0 |
+				  CG_CON0_DISP_DP_INTF0,
+	CG_CON0_ALL		= 0xffffffff
+};
+
+/* DISP_REG_CONFIG_MMSYS_CG_CON1
+   Configures free-run clock gating 0
+	0: Enable clock
+	1: Clock gating */
+enum {
+	CG_CON1_SMI_GALS	= BIT(10),
+	CG_CON1_SMI_COMMON	= BIT(11),
+	CG_CON1_SMI_EMI		= BIT(12),
+	CG_CON1_SMI_IOMMU	= BIT(13),
+	CG_CON1_SMI_LARB	= BIT(14),
+	CG_CON1_SMI_RSI		= BIT(15),
+
+	CG_CON1_DISP_ALL	= CG_CON1_SMI_GALS |
+				  CG_CON1_SMI_COMMON |
+				  CG_CON1_SMI_EMI |
+				  CG_CON1_SMI_IOMMU |
+				  CG_CON1_SMI_LARB |
+				  CG_CON1_SMI_RSI,
+	CG_CON1_ALL		= 0xffffffff
+};
+
+/* DISP_REG_CONFIG_MMSYS_CG_CON2
+   Configures free-run clock gating 0
+	0: Enable clock
+	1: Clock gating */
+enum {
+	CG_CON2_DSI_DSI0	= BIT(0),
+	CG_CON2_DPI_DPI0	= BIT(8),
+	CG_CON2_DP_INTF0	= BIT(16),
+	CG_CON2_MM_26MHZ	= BIT(24),
+
+	CG_CON2_DISP_ALL	= CG_CON2_DP_INTF0 |
+				  CG_CON2_MM_26MHZ,
+	CG_CON2_ALL		= 0xffffffff
+};
+
+enum {
+	DISP_OVL0_GO_BLEND	= BIT(0),
+	DISP_OVL0_GO_BG		= BIT(1),
+	DISP_OVL0_TO_DISP_RDMA0	= BIT(0),
+	DITHER0_MOUT_DSI0	= BIT(0),
+};
+
+enum {
+	SEL_IN_VPP_MERGE_FROM_DSC_WRAP0_OUT	= (0 << 0),
+	SEL_IN_DSC_WRAP0_IN_FROM_DISP_DITHER0	= (0 << 4),
+	SEL_IN_DP_INTF0_FROM_VPP_MERGE		= (1 << 12),
+	SEL_OUT_DISP_DITHER0_TO_DSC_WRAP0_IN	= (0 << 0),
+	SEL_OUT_VPP_MERGE_TO_DP_INTF0		= (1 << 8),
+	SEL_OUT_DSC_WRAP0_OUT_TO_VPP_MERGE	= (2 << 12),
+};
+
+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_OVL0		= BIT(0),
+	MUTEX_MOD_DISP_RDMA0		= BIT(2),
+	MUTEX_MOD_DISP_COLOR0		= BIT(3),
+	MUTEX_MOD_DISP_CCORR0		= BIT(4),
+	MUTEX_MOD_DISP_AAL0		= BIT(5),
+	MUTEX_MOD_DISP_GAMMA0		= BIT(6),
+	MUTEX_MOD_DISP_DITHER0		= BIT(7),
+	MUTEX_MOD_DISP_DSC0		= BIT(9),
+	MUTEX_MOD_DISP_MERGE0		= BIT(20),
+	MUTEX_MOD_MAIN_PATH		= MUTEX_MOD_DISP_OVL0 |
+					  MUTEX_MOD_DISP_RDMA0 |
+					  MUTEX_MOD_DISP_COLOR0 |
+					  MUTEX_MOD_DISP_CCORR0 |
+					  MUTEX_MOD_DISP_AAL0 |
+					  MUTEX_MOD_DISP_GAMMA0 |
+					  MUTEX_MOD_DISP_DITHER0 |
+					  MUTEX_MOD_DISP_DSC0 |
+					  MUTEX_MOD_DISP_MERGE0,
+};
+
+enum {
+	MUTEX_SOF_SINGLE_MODE	= 0,
+	MUTEX_SOF_DSI0		= 1,
+	MUTEX_SOF_DPI0		= 2,
+	MUTEX_SOF_DP_INTF0	= 3,
+};
+
+struct disp_ccorr_regs {
+	u32 en;
+	u32 reset;
+	u32 inten;
+	u32 intsta;
+	u32 status;
+	u32 reserved0[3];
+	u32 cfg;
+	u32 reserved1[3];
+	u32 size;
+	u32 reserved2[27];
+	u32 shadow;
+};
+check_member(disp_ccorr_regs, shadow, 0xa0);
+
+struct disp_gamma_regs {
+	u32 en;
+	u32 reset;
+	u32 inten;
+	u32 intsta;
+	u32 status;
+	u32 reserved0[3];
+	u32 cfg;
+	u32 reserved1[3];
+	u32 size;
+};
+check_member(disp_gamma_regs, size, 0x30);
+
+struct disp_aal_regs {
+	u32 en;
+	u32 reset;
+	u32 inten;
+	u32 intsta;
+	u32 status;
+	u32 reserved0[3];
+	u32 cfg;
+	u32 reserved1[3];
+	u32 size;
+	u32 reserved2[47];
+	u32 shadow;
+	u32 reserved3[249];
+	u32 output_size;
+};
+check_member(disp_aal_regs, shadow, 0xf0);
+check_member(disp_aal_regs, output_size, 0x4d8);
+
+struct disp_dither_regs {
+	u32 en;
+	u32 reset;
+	u32 inten;
+	u32 intsta;
+	u32 status;
+	u32 reserved0[3];
+	u32 cfg;
+	u32 reserved1[3];
+	u32 size;
+	u32 reserved2[51];
+	u32 shadow;
+};
+check_member(disp_dither_regs, shadow, 0x100);
+
+struct disp_dsc_regs {
+	u32 con;
+	u32 inten;
+	u32 intsta;
+	u32 intack;
+	u32 status;
+	u32 reserved0;
+	u32 pic_w;
+	u32 pic_h;
+	u32 slice_w;
+	u32 slice_h;
+	u32 chunk_size;
+	u32 buf_size;
+	u32 mode;
+	u32 cfg;
+	u32 pad;
+	u32 reserved1[9];
+	u32 dbg_con;
+	u32 cksm_mon0;
+	u32 cksm_mon1;
+	u32 mute_con;
+	u32 obuf;
+	u32 reserved2[3];
+	u32 pps[20];
+	u32 reserved3[12];
+	u32 dbg[21];
+	u32 reserved4[3];
+	u32 enc_dbg[4];
+	u32 reserved5[36];
+	u32 shadow;
+};
+check_member(disp_dsc_regs, obuf, 0x70);
+check_member(disp_dsc_regs, shadow, 0x200);
+
+struct disp_merge_regs {
+	u32 en;
+	u32 reset;
+	u32 reserved0[2];
+	u32 cfg0;
+	u32 cfg1;
+	u32 cfg2;
+	u32 cfg3;
+	u32 cfg4;
+	u32 cfg5;
+	u32 cfg6;
+	u32 cfg7;
+	u32 cfg8;
+	u32 cfg9;
+	u32 cfg10;
+	u32 cfg11;
+	u32 cfg12;
+	u32 cfg13;
+	u32 cfg14;
+	u32 cfg15;
+	u32 cfg16;
+	u32 cfg17;
+	u32 cfg18;
+	u32 cfg19;
+	u32 cfg20;
+	u32 cfg21;
+	u32 cfg22;
+	u32 cfg23;
+	u32 cfg24;
+	u32 cfg25;
+	u32 cfg26;
+	u32 cfg27;
+	u32 cfg28;
+	u32 cfg29;
+	u32 cfg30;
+	u32 cfg31;
+	u32 cfg32;
+	u32 cfg33;
+	u32 cfg34;
+	u32 cfg35;
+	u32 cfg36;
+	u32 cfg37;
+	u32 cfg38;
+	u32 cfg39;
+	u32 cfg40;
+	u32 cfg41;
+	u32 cfg42;
+	u32 cfg43;
+	u32 cfg44;
+	u32 cfg45;
+	u32 cfg46;
+	u32 cfg47;
+	u32 cfg48;
+	u32 cfg49;
+	u32 cfg50;
+	u32 cfg51;
+	u32 cfg52;
+	u32 cfg53;
+	u32 cfg54;
+	u32 cfg55;
+};
+check_member(disp_merge_regs, cfg55, 0xec);
+
+enum {
+	DISP_DSC0_EN		= BIT(0),
+	DISP_DSC0_DUAL_INOUT	= BIT(2),
+	DISP_DSC0_BYPASS	= BIT(4),
+	DISP_DSC0_UFOE_SEL	= BIT(16),
+	DISP_DSC0_CON		= DISP_DSC0_EN |
+				  DISP_DSC0_DUAL_INOUT |
+				  DISP_DSC0_BYPASS |
+				  DISP_DSC0_UFOE_SEL,
+};
+
+enum {
+	PQ_EN		= BIT(0),
+	PQ_RELAY_MODE	= BIT(0),
+	PQ_ENGINE_EN	= BIT(1),
+};
+
+static struct disp_ccorr_regs *const disp_ccorr = (void *)DISP_CCORR0_BASE;
+
+static struct disp_aal_regs *const disp_aal = (void *)DISP_AAL0_BASE;
+
+static struct disp_gamma_regs *const disp_gamma = (void *)DISP_GAMMA0_BASE;
+
+static struct disp_dither_regs *const disp_dither = (void *)DISP_DITHER0_BASE;
+
+static struct disp_dsc_regs *const disp_dsc = (void *)DISP_DSC0_BASE;
+
+static struct disp_merge_regs *const disp_merge = (void *)DISP_MERGE0_BASE;
+
+enum {
+	SMI_LARB_PORT_L0_OVL_RDMA0	= 0x388,
+};
+
+void mtk_ddp_init(void);
+void mtk_ddp_mode_set(const struct edid *edid);
+
+#endif