video: tegra20: add DSI controller driver

Adds support for both DSI outputs found on Tegra. Only very
minimal functionality is implemented, so advanced features
like ganged mode won't work. Driver is heavily based on
mainline Tegra DSI and re-uses much of its features.

Only T30 is supported for now but T20 support can be added
if any supported devices will be found.

Driver is wrapped as panel driver since Tegra DC driver supports
only panel drivers calls.

Tested-by: Andreas Westman Dorcsak <hedmoo@yahoo.com> # ASUS TF600T T30
Tested-by: Svyatoslav Ryhel <clamor95@gmail.com> # HTC One X T30
Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>

1 files changed, 217 insertions, 0 deletions

diff --git a/arch/arm/include/asm/arch-tegra30/dsi.h b/arch/arm/include/asm/arch-tegra30/dsi.h
new file mode 100644
index 0000000..7ade132
--- /dev/null
+++ b/arch/arm/include/asm/arch-tegra30/dsi.h
@@ -0,0 +1,217 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ *  (C) Copyright 2010
+ *  NVIDIA Corporation <www.nvidia.com>
+ */
+
+#ifndef __ASM_ARCH_TEGRA_DSI_H
+#define __ASM_ARCH_TEGRA_DSI_H
+
+#ifndef __ASSEMBLY__
+#include <linux/bitops.h>
+#endif
+
+/* Register definitions for the Tegra display serial interface */
+
+/* DSI syncpoint register 0x000 ~ 0x002 */
+struct dsi_syncpt_reg {
+	/* Address 0x000 ~ 0x002 */
+	uint incr_syncpt;		/* _INCR_SYNCPT_0 */
+	uint incr_syncpt_ctrl;		/* _INCR_SYNCPT_CNTRL_0 */
+	uint incr_syncpt_err;		/* _INCR_SYNCPT_ERROR_0 */
+};
+
+/* DSI misc register 0x008 ~ 0x015 */
+struct dsi_misc_reg {
+	/* Address 0x008 ~ 0x015 */
+	uint ctxsw;			/* _CTXSW_0 */
+	uint dsi_rd_data;		/* _DSI_RD_DATA_0 */
+	uint dsi_wr_data;		/* _DSI_WR_DATA_0 */
+	uint dsi_pwr_ctrl;		/* _DSI_POWER_CONTROL_0 */
+	uint int_enable;		/* _INT_ENABLE_0 */
+	uint int_status;		/* _INT_STATUS_0 */
+	uint int_mask;			/* _INT_MASK_0 */
+	uint host_dsi_ctrl;		/* _HOST_DSI_CONTROL_0 */
+	uint dsi_ctrl;			/* _DSI_CONTROL_0 */
+	uint dsi_sol_delay;		/* _DSI_SOL_DELAY_0 */
+	uint dsi_max_threshold;		/* _DSI_MAX_THRESHOLD_0 */
+	uint dsi_trigger;		/* _DSI_TRIGGER_0 */
+	uint dsi_tx_crc;		/* _DSI_TX_CRC_0 */
+	uint dsi_status;		/* _DSI_STATUS_0 */
+};
+
+/* DSI init sequence register 0x01a ~ 0x022 */
+struct dsi_init_seq_reg {
+	/* Address 0x01a ~ 0x022 */
+	uint dsi_init_seq_ctrl;		/* _DSI_INIT_SEQ_CONTROL_0 */
+	uint dsi_init_seq_data_0;	/* _DSI_INIT_SEQ_DATA_0_0 */
+	uint dsi_init_seq_data_1;	/* _DSI_INIT_SEQ_DATA_1_0 */
+	uint dsi_init_seq_data_2;	/* _DSI_INIT_SEQ_DATA_2_0 */
+	uint dsi_init_seq_data_3;	/* _DSI_INIT_SEQ_DATA_3_0 */
+	uint dsi_init_seq_data_4;	/* _DSI_INIT_SEQ_DATA_4_0 */
+	uint dsi_init_seq_data_5;	/* _DSI_INIT_SEQ_DATA_5_0 */
+	uint dsi_init_seq_data_6;	/* _DSI_INIT_SEQ_DATA_6_0 */
+	uint dsi_init_seq_data_7;	/* _DSI_INIT_SEQ_DATA_7_0 */
+};
+
+/* DSI packet sequence register 0x023 ~ 0x02e */
+struct dsi_pkt_seq_reg {
+	/* Address 0x023 ~ 0x02e */
+	uint dsi_pkt_seq_0_lo;		/* _DSI_PKT_SEQ_0_LO_0 */
+	uint dsi_pkt_seq_0_hi;		/* _DSI_PKT_SEQ_0_HI_0 */
+	uint dsi_pkt_seq_1_lo;		/* _DSI_PKT_SEQ_1_LO_0 */
+	uint dsi_pkt_seq_1_hi;		/* _DSI_PKT_SEQ_1_HI_0 */
+	uint dsi_pkt_seq_2_lo;		/* _DSI_PKT_SEQ_2_LO_0 */
+	uint dsi_pkt_seq_2_hi;		/* _DSI_PKT_SEQ_2_HI_0 */
+	uint dsi_pkt_seq_3_lo;		/* _DSI_PKT_SEQ_3_LO_0 */
+	uint dsi_pkt_seq_3_hi;		/* _DSI_PKT_SEQ_3_HI_0 */
+	uint dsi_pkt_seq_4_lo;		/* _DSI_PKT_SEQ_4_LO_0 */
+	uint dsi_pkt_seq_4_hi;		/* _DSI_PKT_SEQ_4_HI_0 */
+	uint dsi_pkt_seq_5_lo;		/* _DSI_PKT_SEQ_5_LO_0 */
+	uint dsi_pkt_seq_5_hi;		/* _DSI_PKT_SEQ_5_HI_0 */
+};
+
+/* DSI packet length register 0x033 ~ 0x037 */
+struct dsi_pkt_len_reg {
+	/* Address 0x033 ~ 0x037 */
+	uint dsi_dcs_cmds;		/* _DSI_DCS_CMDS_0 */
+	uint dsi_pkt_len_0_1;		/* _DSI_PKT_LEN_0_1_0 */
+	uint dsi_pkt_len_2_3;		/* _DSI_PKT_LEN_2_3_0 */
+	uint dsi_pkt_len_4_5;		/* _DSI_PKT_LEN_4_5_0 */
+	uint dsi_pkt_len_6_7;		/* _DSI_PKT_LEN_6_7_0 */
+};
+
+/* DSI PHY timing register 0x03c ~ 0x03f */
+struct dsi_timing_reg {
+	/* Address 0x03c ~ 0x03f */
+	uint dsi_phy_timing_0;		/* _DSI_PHY_TIMING_0_0 */
+	uint dsi_phy_timing_1;		/* _DSI_PHY_TIMING_1_0 */
+	uint dsi_phy_timing_2;		/* _DSI_PHY_TIMING_2_0 */
+	uint dsi_bta_timing;		/* _DSI_BTA_TIMING_0 */
+};
+
+/* DSI timeout register 0x044 ~ 0x046 */
+struct dsi_timeout_reg {
+	/* Address 0x044 ~ 0x046 */
+	uint dsi_timeout_0;		/* _DSI_TIMEOUT_0_0 */
+	uint dsi_timeout_1;		/* _DSI_TIMEOUT_1_0 */
+	uint dsi_to_tally;		/* _DSI_TO_TALLY_0 */
+};
+
+/* DSI PAD control register 0x04b ~ 0x04e */
+struct dsi_pad_ctrl_reg {
+	/* Address 0x04b ~ 0x04e */
+	uint pad_ctrl;			/* _PAD_CONTROL_0 */
+	uint pad_ctrl_cd;		/* _PAD_CONTROL_CD_0 */
+	uint pad_cd_status;		/* _PAD_CD_STATUS_0 */
+	uint dsi_vid_mode_control;	/* _DSI_VID_MODE_CONTROL_0 */
+};
+
+/* Display Serial Interface (DSI_) regs */
+struct dsi_ctlr {
+	struct dsi_syncpt_reg syncpt;	/* SYNCPT register 0x000 ~ 0x002 */
+	uint reserved0[5];		/* reserved_0[5] */
+
+	struct dsi_misc_reg misc;	/* MISC register 0x008 ~ 0x015 */
+	uint reserved1[4];		/* reserved_1[4] */
+
+	struct dsi_init_seq_reg init;	/* INIT register 0x01a ~ 0x022 */
+	struct dsi_pkt_seq_reg pkt;	/* PKT register 0x023 ~ 0x02e */
+	uint reserved2[4];		/* reserved_2[4] */
+
+	struct dsi_pkt_len_reg len;	/* LEN registers 0x033 ~ 0x037 */
+	uint reserved3[4];		/* reserved_3[4] */
+
+	struct dsi_timing_reg ptiming;	/* TIMING registers 0x03c ~ 0x03f */
+	uint reserved4[4];		/* reserved_4[4] */
+
+	struct dsi_timeout_reg timeout;	/* TIMEOUT registers 0x044 ~ 0x046 */
+	uint reserved5[4];		/* reserved_5[4] */
+
+	struct dsi_pad_ctrl_reg pad;	/* PAD registers 0x04b ~ 0x04e */
+};
+
+#define DSI_POWER_CONTROL_ENABLE	BIT(0)
+
+#define DSI_HOST_CONTROL_FIFO_RESET	BIT(21)
+#define DSI_HOST_CONTROL_CRC_RESET	BIT(20)
+#define DSI_HOST_CONTROL_TX_TRIG_SOL	(0 << 12)
+#define DSI_HOST_CONTROL_TX_TRIG_FIFO	(1 << 12)
+#define DSI_HOST_CONTROL_TX_TRIG_HOST	(2 << 12)
+#define DSI_HOST_CONTROL_RAW		BIT(6)
+#define DSI_HOST_CONTROL_HS		BIT(5)
+#define DSI_HOST_CONTROL_FIFO_SEL	BIT(4)
+#define DSI_HOST_CONTROL_IMM_BTA	BIT(3)
+#define DSI_HOST_CONTROL_PKT_BTA	BIT(2)
+#define DSI_HOST_CONTROL_CS		BIT(1)
+#define DSI_HOST_CONTROL_ECC		BIT(0)
+
+#define DSI_CONTROL_HS_CLK_CTRL		BIT(20)
+#define DSI_CONTROL_CHANNEL(c)		(((c) & 0x3) << 16)
+#define DSI_CONTROL_FORMAT(f)		(((f) & 0x3) << 12)
+#define DSI_CONTROL_TX_TRIG(x)		(((x) & 0x3) <<  8)
+#define DSI_CONTROL_LANES(n)		(((n) & 0x3) <<  4)
+#define DSI_CONTROL_DCS_ENABLE		BIT(3)
+#define DSI_CONTROL_SOURCE(s)		(((s) & 0x1) <<  2)
+#define DSI_CONTROL_VIDEO_ENABLE	BIT(1)
+#define DSI_CONTROL_HOST_ENABLE		BIT(0)
+
+#define DSI_TRIGGER_HOST		BIT(1)
+#define DSI_TRIGGER_VIDEO		BIT(0)
+
+#define DSI_STATUS_IDLE			BIT(10)
+#define DSI_STATUS_UNDERFLOW		BIT(9)
+#define DSI_STATUS_OVERFLOW		BIT(8)
+
+#define DSI_TIMING_FIELD(value, period, hwinc) \
+	((DIV_ROUND_CLOSEST(value, period) - (hwinc)) & 0xff)
+
+#define DSI_TIMEOUT_LRX(x)		(((x) & 0xffff) << 16)
+#define DSI_TIMEOUT_HTX(x)		(((x) & 0xffff) <<  0)
+#define DSI_TIMEOUT_PR(x)		(((x) & 0xffff) << 16)
+#define DSI_TIMEOUT_TA(x)		(((x) & 0xffff) <<  0)
+
+#define DSI_TALLY_TA(x)			(((x) & 0xff) << 16)
+#define DSI_TALLY_LRX(x)		(((x) & 0xff) <<  8)
+#define DSI_TALLY_HTX(x)		(((x) & 0xff) <<  0)
+
+#define DSI_PAD_CONTROL_PAD_PULLDN_ENAB(x)	(((x) & 0x1) << 28)
+#define DSI_PAD_CONTROL_PAD_SLEWUPADJ(x)	(((x) & 0x7) << 24)
+#define DSI_PAD_CONTROL_PAD_SLEWDNADJ(x)	(((x) & 0x7) << 20)
+#define DSI_PAD_CONTROL_PAD_PREEMP_EN(x)	(((x) & 0x1) << 19)
+#define DSI_PAD_CONTROL_PAD_PDIO_CLK(x)		(((x) & 0x1) << 18)
+#define DSI_PAD_CONTROL_PAD_PDIO(x)		(((x) & 0x3) << 16)
+#define DSI_PAD_CONTROL_PAD_LPUPADJ(x)		(((x) & 0x3) << 14)
+#define DSI_PAD_CONTROL_PAD_LPDNADJ(x)		(((x) & 0x3) << 12)
+
+/*
+ * pixel format as used in the DSI_CONTROL_FORMAT field
+ */
+enum tegra_dsi_format {
+	TEGRA_DSI_FORMAT_16P,
+	TEGRA_DSI_FORMAT_18NP,
+	TEGRA_DSI_FORMAT_18P,
+	TEGRA_DSI_FORMAT_24P,
+};
+
+/* DSI calibration in VI region */
+#define TEGRA_VI_BASE			0x54080000
+
+#define CSI_CILA_MIPI_CAL_CONFIG_0	0x22a
+#define  MIPI_CAL_TERMOSA(x)		(((x) & 0x1f) << 0)
+
+#define CSI_CILB_MIPI_CAL_CONFIG_0	0x22b
+#define  MIPI_CAL_TERMOSB(x)		(((x) & 0x1f) << 0)
+
+#define CSI_CIL_PAD_CONFIG		0x229
+#define  PAD_CIL_PDVREG(x)		(((x) & 0x01) << 1)
+
+#define CSI_DSI_MIPI_CAL_CONFIG		0x234
+#define  MIPI_CAL_HSPDOSD(x)		(((x) & 0x1f) << 16)
+#define  MIPI_CAL_HSPUOSD(x)		(((x) & 0x1f) << 8)
+
+#define CSI_MIPIBIAS_PAD_CONFIG		0x235
+#define  PAD_DRIV_DN_REF(x)		(((x) & 0x7) << 16)
+#define  PAD_DRIV_UP_REF(x)		(((x) & 0x7) << 8)
+
+#endif /* __ASM_ARCH_TEGRA_DSI_H */