video: add MIPI DBI Type C Option 3 support

Import the Linux v5.15 state of the driver to allow easy porting of
MIPI-DBI displays like the Ilitek 9431 added in a follow-up commit.

Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Link: https://lore.barebox.org/20220202223023.341817-4-a.fatoum@pengutronix.de
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

3 files changed, 275 insertions, 0 deletions

diff --git a/include/spi/spi.h b/include/spi/spi.h
index c5ad6bd39f..d133e0e212 100644
--- a/include/spi/spi.h
+++ b/include/spi/spi.h
@@ -409,6 +409,26 @@ spi_message_add_tail(struct spi_transfer *t, struct spi_message *m)
 	list_add_tail(&t->transfer_list, &m->transfers);
 }
 
+/**
+ * spi_message_init_with_transfers - Initialize spi_message and append transfers
+ * @m: spi_message to be initialized
+ * @xfers: An array of spi transfers
+ * @num_xfers: Number of items in the xfer array
+ *
+ * This function initializes the given spi_message and adds each spi_transfer in
+ * the given array to the message.
+ */
+static inline void
+spi_message_init_with_transfers(struct spi_message *m,
+struct spi_transfer *xfers, unsigned int num_xfers)
+{
+	unsigned int i;
+
+	spi_message_init(m);
+	for (i = 0; i < num_xfers; ++i)
+		spi_message_add_tail(&xfers[i], m);
+}
+
 static inline void
 spi_transfer_del(struct spi_transfer *t)
 {
diff --git a/include/video/mipi_dbi.h b/include/video/mipi_dbi.h
new file mode 100644
index 0000000000..92fdc500d1
--- /dev/null
+++ b/include/video/mipi_dbi.h
@@ -0,0 +1,105 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * MIPI Display Bus Interface (DBI) LCD controller support
+ *
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#ifndef __LINUX_MIPI_DBI_H
+#define __LINUX_MIPI_DBI_H
+
+#include <linux/types.h>
+#include <spi/spi.h>
+#include <driver.h>
+
+struct regulator;
+struct fb_videomode;
+
+/**
+ * struct mipi_dbi - MIPI DBI interface
+ */
+struct mipi_dbi {
+	/**
+	 * @command: Bus specific callback executing commands.
+	 */
+	int (*command)(struct mipi_dbi *dbi, u8 *cmd, u8 *param, size_t num);
+
+	/**
+	 * @read_commands: Array of read commands terminated by a zero entry.
+	 *                 Reading is disabled if this is NULL.
+	 */
+	const u8 *read_commands;
+
+	/**
+	 * @swap_bytes: Swap bytes in buffer before transfer
+	 */
+	bool swap_bytes;
+
+	/**
+	 * @reset: Optional reset gpio
+	 */
+	int reset;
+
+	/* Type C specific */
+
+	/**
+	 * @spi: SPI device
+	 */
+	struct spi_device *spi;
+
+	/**
+	 * @dc: Optional D/C gpio.
+	 */
+	int dc;
+
+	struct list_head list;
+};
+
+static inline const char *mipi_dbi_name(struct mipi_dbi *dbi)
+{
+	return dev_name(&dbi->spi->dev);
+}
+
+int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *dbi,
+		      int dc);
+void mipi_dbi_hw_reset(struct mipi_dbi *dbi);
+bool mipi_dbi_display_is_on(struct mipi_dbi *dbi);
+
+u32 mipi_dbi_spi_cmd_max_speed(struct spi_device *spi, size_t len);
+int mipi_dbi_spi_transfer(struct spi_device *spi, u32 speed_hz,
+			  u8 bpw, const void *buf, size_t len);
+
+int mipi_dbi_command_read(struct mipi_dbi *dbi, u8 cmd, u8 *val);
+int mipi_dbi_command_buf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len);
+int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, const u8 *data,
+			      size_t len);
+
+/**
+ * mipi_dbi_command - MIPI DCS command with optional parameter(s)
+ * @dbi: MIPI DBI structure
+ * @cmd: Command
+ * @seq: Optional parameter(s)
+ *
+ * Send MIPI DCS command to the controller. Use mipi_dbi_command_read() for
+ * get/read.
+ *
+ * Returns:
+ * Zero on success, negative error code on failure.
+ */
+#define mipi_dbi_command(dbi, cmd, seq...) \
+({ \
+	const u8 d[] = { seq }; \
+	struct device_d *dev = &(dbi)->spi->dev;	\
+	int ret; \
+	ret = mipi_dbi_command_stackbuf(dbi, cmd, d, ARRAY_SIZE(d)); \
+	if (ret) \
+		dev_err(dev, "error %pe when sending command %#02x\n", ERR_PTR(ret), cmd); \
+	ret; \
+})
+
+bool mipi_dbi_command_is_read(struct mipi_dbi *dbi, u8 cmd);
+int mipi_dbi_command_read_len(int cmd);
+
+extern struct list_head mipi_dbi_list;
+
+#endif /* __LINUX_MIPI_DBI_H */
diff --git a/include/video/mipi_display.h b/include/video/mipi_display.h
new file mode 100644
index 0000000000..b6d8b87423
--- /dev/null
+++ b/include/video/mipi_display.h
@@ -0,0 +1,150 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Defines for Mobile Industry Processor Interface (MIPI(R))
+ * Display Working Group standards: DSI, DCS, DBI, DPI
+ *
+ * Copyright (C) 2010 Guennadi Liakhovetski <g.liakhovetski@gmx.de>
+ * Copyright (C) 2006 Nokia Corporation
+ * Author: Imre Deak <imre.deak@nokia.com>
+ */
+#ifndef MIPI_DISPLAY_H
+#define MIPI_DISPLAY_H
+
+/* MIPI DSI Processor-to-Peripheral transaction types */
+enum {
+	MIPI_DSI_V_SYNC_START				= 0x01,
+	MIPI_DSI_V_SYNC_END				= 0x11,
+	MIPI_DSI_H_SYNC_START				= 0x21,
+	MIPI_DSI_H_SYNC_END				= 0x31,
+
+	MIPI_DSI_COMPRESSION_MODE			= 0x07,
+	MIPI_DSI_END_OF_TRANSMISSION			= 0x08,
+
+	MIPI_DSI_COLOR_MODE_OFF				= 0x02,
+	MIPI_DSI_COLOR_MODE_ON				= 0x12,
+	MIPI_DSI_SHUTDOWN_PERIPHERAL			= 0x22,
+	MIPI_DSI_TURN_ON_PERIPHERAL			= 0x32,
+
+	MIPI_DSI_GENERIC_SHORT_WRITE_0_PARAM		= 0x03,
+	MIPI_DSI_GENERIC_SHORT_WRITE_1_PARAM		= 0x13,
+	MIPI_DSI_GENERIC_SHORT_WRITE_2_PARAM		= 0x23,
+
+	MIPI_DSI_GENERIC_READ_REQUEST_0_PARAM		= 0x04,
+	MIPI_DSI_GENERIC_READ_REQUEST_1_PARAM		= 0x14,
+	MIPI_DSI_GENERIC_READ_REQUEST_2_PARAM		= 0x24,
+
+	MIPI_DSI_DCS_SHORT_WRITE			= 0x05,
+	MIPI_DSI_DCS_SHORT_WRITE_PARAM			= 0x15,
+
+	MIPI_DSI_DCS_READ				= 0x06,
+	MIPI_DSI_EXECUTE_QUEUE				= 0x16,
+
+	MIPI_DSI_SET_MAXIMUM_RETURN_PACKET_SIZE		= 0x37,
+
+	MIPI_DSI_NULL_PACKET				= 0x09,
+	MIPI_DSI_BLANKING_PACKET			= 0x19,
+	MIPI_DSI_GENERIC_LONG_WRITE			= 0x29,
+	MIPI_DSI_DCS_LONG_WRITE				= 0x39,
+
+	MIPI_DSI_PICTURE_PARAMETER_SET			= 0x0a,
+	MIPI_DSI_COMPRESSED_PIXEL_STREAM		= 0x0b,
+
+	MIPI_DSI_LOOSELY_PACKED_PIXEL_STREAM_YCBCR20	= 0x0c,
+	MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR24		= 0x1c,
+	MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR16		= 0x2c,
+
+	MIPI_DSI_PACKED_PIXEL_STREAM_30			= 0x0d,
+	MIPI_DSI_PACKED_PIXEL_STREAM_36			= 0x1d,
+	MIPI_DSI_PACKED_PIXEL_STREAM_YCBCR12		= 0x3d,
+
+	MIPI_DSI_PACKED_PIXEL_STREAM_16			= 0x0e,
+	MIPI_DSI_PACKED_PIXEL_STREAM_18			= 0x1e,
+	MIPI_DSI_PIXEL_STREAM_3BYTE_18			= 0x2e,
+	MIPI_DSI_PACKED_PIXEL_STREAM_24			= 0x3e,
+};
+
+/* MIPI DSI Peripheral-to-Processor transaction types */
+enum {
+	MIPI_DSI_RX_ACKNOWLEDGE_AND_ERROR_REPORT	= 0x02,
+	MIPI_DSI_RX_END_OF_TRANSMISSION			= 0x08,
+	MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_1BYTE	= 0x11,
+	MIPI_DSI_RX_GENERIC_SHORT_READ_RESPONSE_2BYTE	= 0x12,
+	MIPI_DSI_RX_GENERIC_LONG_READ_RESPONSE		= 0x1a,
+	MIPI_DSI_RX_DCS_LONG_READ_RESPONSE		= 0x1c,
+	MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_1BYTE	= 0x21,
+	MIPI_DSI_RX_DCS_SHORT_READ_RESPONSE_2BYTE	= 0x22,
+};
+
+/* MIPI DCS commands */
+enum {
+	MIPI_DCS_NOP			= 0x00,
+	MIPI_DCS_SOFT_RESET		= 0x01,
+	MIPI_DCS_GET_COMPRESSION_MODE	= 0x03,
+	MIPI_DCS_GET_DISPLAY_ID		= 0x04,
+	MIPI_DCS_GET_ERROR_COUNT_ON_DSI	= 0x05,
+	MIPI_DCS_GET_RED_CHANNEL	= 0x06,
+	MIPI_DCS_GET_GREEN_CHANNEL	= 0x07,
+	MIPI_DCS_GET_BLUE_CHANNEL	= 0x08,
+	MIPI_DCS_GET_DISPLAY_STATUS	= 0x09,
+	MIPI_DCS_GET_POWER_MODE		= 0x0A,
+	MIPI_DCS_GET_ADDRESS_MODE	= 0x0B,
+	MIPI_DCS_GET_PIXEL_FORMAT	= 0x0C,
+	MIPI_DCS_GET_DISPLAY_MODE	= 0x0D,
+	MIPI_DCS_GET_SIGNAL_MODE	= 0x0E,
+	MIPI_DCS_GET_DIAGNOSTIC_RESULT	= 0x0F,
+	MIPI_DCS_ENTER_SLEEP_MODE	= 0x10,
+	MIPI_DCS_EXIT_SLEEP_MODE	= 0x11,
+	MIPI_DCS_ENTER_PARTIAL_MODE	= 0x12,
+	MIPI_DCS_ENTER_NORMAL_MODE	= 0x13,
+	MIPI_DCS_GET_IMAGE_CHECKSUM_RGB	= 0x14,
+	MIPI_DCS_GET_IMAGE_CHECKSUM_CT	= 0x15,
+	MIPI_DCS_EXIT_INVERT_MODE	= 0x20,
+	MIPI_DCS_ENTER_INVERT_MODE	= 0x21,
+	MIPI_DCS_SET_GAMMA_CURVE	= 0x26,
+	MIPI_DCS_SET_DISPLAY_OFF	= 0x28,
+	MIPI_DCS_SET_DISPLAY_ON		= 0x29,
+	MIPI_DCS_SET_COLUMN_ADDRESS	= 0x2A,
+	MIPI_DCS_SET_PAGE_ADDRESS	= 0x2B,
+	MIPI_DCS_WRITE_MEMORY_START	= 0x2C,
+	MIPI_DCS_WRITE_LUT		= 0x2D,
+	MIPI_DCS_READ_MEMORY_START	= 0x2E,
+	MIPI_DCS_SET_PARTIAL_ROWS	= 0x30,		/* MIPI DCS 1.02 - MIPI_DCS_SET_PARTIAL_AREA before that */
+	MIPI_DCS_SET_PARTIAL_COLUMNS	= 0x31,
+	MIPI_DCS_SET_SCROLL_AREA	= 0x33,
+	MIPI_DCS_SET_TEAR_OFF		= 0x34,
+	MIPI_DCS_SET_TEAR_ON		= 0x35,
+	MIPI_DCS_SET_ADDRESS_MODE	= 0x36,
+	MIPI_DCS_SET_SCROLL_START	= 0x37,
+	MIPI_DCS_EXIT_IDLE_MODE		= 0x38,
+	MIPI_DCS_ENTER_IDLE_MODE	= 0x39,
+	MIPI_DCS_SET_PIXEL_FORMAT	= 0x3A,
+	MIPI_DCS_WRITE_MEMORY_CONTINUE	= 0x3C,
+	MIPI_DCS_SET_3D_CONTROL		= 0x3D,
+	MIPI_DCS_READ_MEMORY_CONTINUE	= 0x3E,
+	MIPI_DCS_GET_3D_CONTROL		= 0x3F,
+	MIPI_DCS_SET_VSYNC_TIMING	= 0x40,
+	MIPI_DCS_SET_TEAR_SCANLINE	= 0x44,
+	MIPI_DCS_GET_SCANLINE		= 0x45,
+	MIPI_DCS_SET_DISPLAY_BRIGHTNESS = 0x51,		/* MIPI DCS 1.3 */
+	MIPI_DCS_GET_DISPLAY_BRIGHTNESS = 0x52,		/* MIPI DCS 1.3 */
+	MIPI_DCS_WRITE_CONTROL_DISPLAY  = 0x53,		/* MIPI DCS 1.3 */
+	MIPI_DCS_GET_CONTROL_DISPLAY	= 0x54,		/* MIPI DCS 1.3 */
+	MIPI_DCS_WRITE_POWER_SAVE	= 0x55,		/* MIPI DCS 1.3 */
+	MIPI_DCS_GET_POWER_SAVE		= 0x56,		/* MIPI DCS 1.3 */
+	MIPI_DCS_SET_CABC_MIN_BRIGHTNESS = 0x5E,	/* MIPI DCS 1.3 */
+	MIPI_DCS_GET_CABC_MIN_BRIGHTNESS = 0x5F,	/* MIPI DCS 1.3 */
+	MIPI_DCS_READ_DDB_START		= 0xA1,
+	MIPI_DCS_READ_PPS_START		= 0xA2,
+	MIPI_DCS_READ_DDB_CONTINUE	= 0xA8,
+	MIPI_DCS_READ_PPS_CONTINUE	= 0xA9,
+};
+
+/* MIPI DCS pixel formats */
+#define MIPI_DCS_PIXEL_FMT_24BIT	7
+#define MIPI_DCS_PIXEL_FMT_18BIT	6
+#define MIPI_DCS_PIXEL_FMT_16BIT	5
+#define MIPI_DCS_PIXEL_FMT_12BIT	3
+#define MIPI_DCS_PIXEL_FMT_8BIT		2
+#define MIPI_DCS_PIXEL_FMT_3BIT		1
+
+#endif