3  * MIPI Display Bus Interface (DBI) LCD controller support
40  * This library provides helpers for MIPI Display Bus Interface (DBI)
50  * There are 3 MIPI DBI implementation types:
100 static bool mipi_dbi_command_is_read(struct mipi_dbi *dbi, u8 cmd)  in mipi_dbi_command_is_read()  argument
104 	if (!dbi->read_commands)  in mipi_dbi_command_is_read()
108 		if (!dbi->read_commands[i])  in mipi_dbi_command_is_read()
110 		if (cmd == dbi->read_commands[i])  in mipi_dbi_command_is_read()
119  * @dbi: MIPI DBI structure
128 int mipi_dbi_command_read(struct mipi_dbi *dbi, u8 cmd, u8 *val)  in mipi_dbi_command_read()  argument
130 	if (!dbi->read_commands)  in mipi_dbi_command_read()
133 	if (!mipi_dbi_command_is_read(dbi, cmd))  in mipi_dbi_command_read()
136 	return mipi_dbi_command_buf(dbi, cmd, val, 1);  in mipi_dbi_command_read()
142  * @dbi: MIPI DBI structure
150 int mipi_dbi_command_buf(struct mipi_dbi *dbi, u8 cmd, u8 *data, size_t len)  in mipi_dbi_command_buf()  argument
160 	mutex_lock(&dbi->cmdlock);  in mipi_dbi_command_buf()
161 	ret = dbi->command(dbi, cmdbuf, data, len);  in mipi_dbi_command_buf()
162 	mutex_unlock(&dbi->cmdlock);  in mipi_dbi_command_buf()
171 int mipi_dbi_command_stackbuf(struct mipi_dbi *dbi, u8 cmd, const u8 *data,  in mipi_dbi_command_stackbuf()  argument
181 	ret = mipi_dbi_command_buf(dbi, cmd, buf, len);  in mipi_dbi_command_stackbuf()
237 	struct mipi_dbi *dbi = &dbidev->dbi;  in mipi_dbi_set_window_address()  local
244 	mipi_dbi_command(dbi, MIPI_DCS_SET_COLUMN_ADDRESS, (xs >> 8) & 0xff,  in mipi_dbi_set_window_address()
246 	mipi_dbi_command(dbi, MIPI_DCS_SET_PAGE_ADDRESS, (ys >> 8) & 0xff,  in mipi_dbi_set_window_address()
257 	struct mipi_dbi *dbi = &dbidev->dbi;  in mipi_dbi_fb_dirty()  local
258 	bool swap = dbi->swap_bytes;  in mipi_dbi_fb_dirty()
273 	if (!dbi->dc || !full || swap ||  in mipi_dbi_fb_dirty()
286 	ret = mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START, tr,  in mipi_dbi_fb_dirty()
318  * mipi_dbi_enable_flush - MIPI DBI enable helper
319  * @dbidev: MIPI DBI device structure
358 	struct mipi_dbi *dbi = &dbidev->dbi;  in mipi_dbi_blank()  local
368 	mipi_dbi_command_buf(dbi, MIPI_DCS_WRITE_MEMORY_START,  in mipi_dbi_blank()
375  * mipi_dbi_pipe_disable - MIPI DBI pipe disable helper
464  * mipi_dbi_dev_init_with_formats - MIPI DBI device initialization with custom formats
465  * @dbidev: MIPI DBI device structure to initialize
499 	if (!dbidev->dbi.command)  in mipi_dbi_dev_init_with_formats()
544  * mipi_dbi_dev_init - MIPI DBI device initialization
545  * @dbidev: MIPI DBI device structure to initialize
576  * @dbi: MIPI DBI structure
580 void mipi_dbi_hw_reset(struct mipi_dbi *dbi)  in mipi_dbi_hw_reset()  argument
582 	if (!dbi->reset)  in mipi_dbi_hw_reset()
585 	gpiod_set_value_cansleep(dbi->reset, 0);  in mipi_dbi_hw_reset()
587 	gpiod_set_value_cansleep(dbi->reset, 1);  in mipi_dbi_hw_reset()
594  * @dbi: MIPI DBI structure
604 bool mipi_dbi_display_is_on(struct mipi_dbi *dbi)  in mipi_dbi_display_is_on()  argument
608 	if (mipi_dbi_command_read(dbi, MIPI_DCS_GET_POWER_MODE, &val))  in mipi_dbi_display_is_on()
627 	struct mipi_dbi *dbi = &dbidev->dbi;  in mipi_dbi_poweron_reset_conditional()  local
638 	if (cond && mipi_dbi_display_is_on(dbi))  in mipi_dbi_poweron_reset_conditional()
641 	mipi_dbi_hw_reset(dbi);  in mipi_dbi_poweron_reset_conditional()
642 	ret = mipi_dbi_command(dbi, MIPI_DCS_SOFT_RESET);  in mipi_dbi_poweron_reset_conditional()
655 	if (dbi->reset)  in mipi_dbi_poweron_reset_conditional()
664  * mipi_dbi_poweron_reset - MIPI DBI poweron and reset
665  * @dbidev: MIPI DBI device structure
680  * mipi_dbi_poweron_conditional_reset - MIPI DBI poweron and conditional reset
681  * @dbidev: MIPI DBI device structure
727  * MIPI DBI Type C Option 1
744 static int mipi_dbi_spi1e_transfer(struct mipi_dbi *dbi, int dc,  in mipi_dbi_spi1e_transfer()  argument
749 	size_t chunk, max_chunk = dbi->tx_buf9_len;  in mipi_dbi_spi1e_transfer()
750 	struct spi_device *spi = dbi->spi;  in mipi_dbi_spi1e_transfer()
752 		.tx_buf = dbi->tx_buf9,  in mipi_dbi_spi1e_transfer()
772 		dst = dbi->tx_buf9;  in mipi_dbi_spi1e_transfer()
792 		dst = dbi->tx_buf9;  in mipi_dbi_spi1e_transfer()
862 static int mipi_dbi_spi1_transfer(struct mipi_dbi *dbi, int dc,  in mipi_dbi_spi1_transfer()  argument
866 	struct spi_device *spi = dbi->spi;  in mipi_dbi_spi1_transfer()
878 		return mipi_dbi_spi1e_transfer(dbi, dc, buf, len, bpw);  in mipi_dbi_spi1_transfer()
881 	max_chunk = dbi->tx_buf9_len;  in mipi_dbi_spi1_transfer()
882 	dst16 = dbi->tx_buf9;  in mipi_dbi_spi1_transfer()
925 static int mipi_dbi_typec1_command_read(struct mipi_dbi *dbi, u8 *cmd,  in mipi_dbi_typec1_command_read()  argument
928 	struct spi_device *spi = dbi->spi;  in mipi_dbi_typec1_command_read()
935 			.tx_buf = dbi->tx_buf9,  in mipi_dbi_typec1_command_read()
966 	dst16 = dbi->tx_buf9;  in mipi_dbi_typec1_command_read()
978 static int mipi_dbi_typec1_command(struct mipi_dbi *dbi, u8 *cmd,  in mipi_dbi_typec1_command()  argument
984 	if (mipi_dbi_command_is_read(dbi, *cmd))  in mipi_dbi_typec1_command()
985 		return mipi_dbi_typec1_command_read(dbi, cmd, parameters, num);  in mipi_dbi_typec1_command()
989 	ret = mipi_dbi_spi1_transfer(dbi, 0, cmd, 1, 8);  in mipi_dbi_typec1_command()
993 	return mipi_dbi_spi1_transfer(dbi, 1, parameters, num, bpw);  in mipi_dbi_typec1_command()
996 /* MIPI DBI Type C Option 3 */
998 static int mipi_dbi_typec3_command_read(struct mipi_dbi *dbi, u8 *cmd,  in mipi_dbi_typec3_command_read()  argument
1001 	struct spi_device *spi = dbi->spi;  in mipi_dbi_typec3_command_read()
1038 	gpiod_set_value_cansleep(dbi->dc, 0);  in mipi_dbi_typec3_command_read()
1062 static int mipi_dbi_typec3_command(struct mipi_dbi *dbi, u8 *cmd,  in mipi_dbi_typec3_command()  argument
1065 	struct spi_device *spi = dbi->spi;  in mipi_dbi_typec3_command()
1070 	if (mipi_dbi_command_is_read(dbi, *cmd))  in mipi_dbi_typec3_command()
1071 		return mipi_dbi_typec3_command_read(dbi, cmd, par, num);  in mipi_dbi_typec3_command()
1075 	gpiod_set_value_cansleep(dbi->dc, 0);  in mipi_dbi_typec3_command()
1081 	if (*cmd == MIPI_DCS_WRITE_MEMORY_START && !dbi->swap_bytes)  in mipi_dbi_typec3_command()
1084 	gpiod_set_value_cansleep(dbi->dc, 1);  in mipi_dbi_typec3_command()
1091  * mipi_dbi_spi_init - Initialize MIPI DBI SPI interface
1093  * @dbi: MIPI DBI structure to initialize
1112 int mipi_dbi_spi_init(struct spi_device *spi, struct mipi_dbi *dbi,  in mipi_dbi_spi_init()  argument
1136 	dbi->spi = spi;  in mipi_dbi_spi_init()
1137 	dbi->read_commands = mipi_dbi_dcs_read_commands;  in mipi_dbi_spi_init()
1140 		dbi->command = mipi_dbi_typec3_command;  in mipi_dbi_spi_init()
1141 		dbi->dc = dc;  in mipi_dbi_spi_init()
1143 			dbi->swap_bytes = true;  in mipi_dbi_spi_init()
1145 		dbi->command = mipi_dbi_typec1_command;  in mipi_dbi_spi_init()
1146 		dbi->tx_buf9_len = SZ_16K;  in mipi_dbi_spi_init()
1147 		dbi->tx_buf9 = devm_kmalloc(dev, dbi->tx_buf9_len, GFP_KERNEL);  in mipi_dbi_spi_init()
1148 		if (!dbi->tx_buf9)  in mipi_dbi_spi_init()
1152 	mutex_init(&dbi->cmdlock);  in mipi_dbi_spi_init()
1258 	ret = mipi_dbi_command_buf(&dbidev->dbi, cmd, parameters, i);  in mipi_dbi_debugfs_command_write()
1271 	struct mipi_dbi *dbi = &dbidev->dbi;  in mipi_dbi_debugfs_command_show()  local
1280 		if (!mipi_dbi_command_is_read(dbi, cmd))  in mipi_dbi_debugfs_command_show()
1300 		ret = mipi_dbi_command_buf(dbi, cmd, val, len);  in mipi_dbi_debugfs_command_show()
1343 	if (dbidev->dbi.read_commands)  in mipi_dbi_debugfs_init()