#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
+#include <drm/drm_print.h>
#include <linux/gpio/consumer.h>
#include <linux/delay.h>
+#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regulator/consumer.h>
+#include <linux/spi/spi.h>
#include <video/mipi_display.h>
+#define SPI_DATA_FLAG 0x100
+
/* Command2 BKx selection command */
#define DSI_CMD2BKX_SEL 0xFF
* 11 = CMD2BK1, Command2 BK1
* 00 = Command2 disable
*/
+#define DSI_CMD2BK3_SEL 0x13
#define DSI_CMD2BK1_SEL 0x11
#define DSI_CMD2BK0_SEL 0x10
#define DSI_CMD2BKX_SEL_NONE 0x00
+#define SPI_CMD2BK3_SEL (SPI_DATA_FLAG | DSI_CMD2BK3_SEL)
+#define SPI_CMD2BK1_SEL (SPI_DATA_FLAG | DSI_CMD2BK1_SEL)
+#define SPI_CMD2BK0_SEL (SPI_DATA_FLAG | DSI_CMD2BK0_SEL)
+#define SPI_CMD2BKX_SEL_NONE (SPI_DATA_FLAG | DSI_CMD2BKX_SEL_NONE)
/* Command2, BK0 bytes */
#define DSI_LINESET_LINE 0x69
#define DSI_MIPISET1_EOT_EN BIT(3)
#define DSI_CMD2_BK1_MIPISET1_SET (BIT(7) | DSI_MIPISET1_EOT_EN)
+struct st7701;
+
+enum st7701_ctrl_if {
+ ST7701_CTRL_DSI,
+ ST7701_CTRL_SPI,
+};
+
struct st7701_panel_desc {
const struct drm_display_mode *mode;
unsigned int lanes;
unsigned long flags;
enum mipi_dsi_pixel_format format;
+ u32 mediabus_format;
const char *const *supply_names;
unsigned int num_supplies;
unsigned int panel_sleep_delay;
+ void (*init_sequence)(struct st7701 *st7701);
+ unsigned int conn_type;
+ enum st7701_ctrl_if interface;
+ u32 bus_flags;
};
struct st7701 {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
+ struct spi_device *spi;
+ const struct device *dev;
+
const struct st7701_panel_desc *desc;
struct regulator_bulk_data *supplies;
st7701_dsi_write(st7701, d, ARRAY_SIZE(d)); \
}
-static void st7701_init_sequence(struct st7701 *st7701)
+#define ST7701_SPI(st7701, seq...) \
+ { \
+ const u16 d[] = { seq }; \
+ struct spi_transfer xfer = { }; \
+ struct spi_message spi; \
+ \
+ spi_message_init(&spi); \
+ \
+ xfer.tx_buf = d; \
+ xfer.bits_per_word = 9; \
+ xfer.len = sizeof(u16) * ARRAY_SIZE(d); \
+ \
+ spi_message_add_tail(&xfer, &spi); \
+ spi_sync((st7701)->spi, &spi); \
+ }
+
+static void ts8550b_init_sequence(struct st7701 *st7701)
{
const struct drm_display_mode *mode = st7701->desc->mode;
0x77, 0x01, 0x00, 0x00, DSI_CMD2BKX_SEL_NONE);
}
+static void txw210001b0_init_sequence(struct st7701 *st7701)
+{
+ ST7701_SPI(st7701, MIPI_DCS_SOFT_RESET);
+
+ usleep_range(5000, 7000);
+
+ ST7701_SPI(st7701, DSI_CMD2BKX_SEL,
+ 0x177, 0x101, 0x100, 0x100, SPI_CMD2BK0_SEL);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK0_LNESET, 0x13B, 0x100);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK0_PORCTRL, 0x10B, 0x102);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK0_INVSEL, 0x100, 0x102);
+
+ ST7701_SPI(st7701, 0xCC, 0x110);
+
+ /*
+ * Gamma option B:
+ * Positive Voltage Gamma Control
+ */
+ ST7701_SPI(st7701, DSI_CMD2_BK0_PVGAMCTRL,
+ 0x102, 0x113, 0x11B, 0x10D, 0x110, 0x105, 0x108, 0x107,
+ 0x107, 0x124, 0x104, 0x111, 0x10E, 0x12C, 0x133, 0x11D);
+
+ /* Negative Voltage Gamma Control */
+ ST7701_SPI(st7701, DSI_CMD2_BK0_NVGAMCTRL,
+ 0x105, 0x113, 0x11B, 0x10D, 0x111, 0x105, 0x108, 0x107,
+ 0x107, 0x124, 0x104, 0x111, 0x10E, 0x12C, 0x133, 0x11D);
+
+ ST7701_SPI(st7701, DSI_CMD2BKX_SEL,
+ 0x177, 0x101, 0x100, 0x100, SPI_CMD2BK1_SEL);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_VRHS, 0x15D);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_VCOM, 0x143);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_VGHSS, 0x181);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_TESTCMD, 0x180);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_VGLS, 0x143);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_PWCTLR1, 0x185);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_PWCTLR2, 0x120);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_SPD1, 0x178);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_SPD2, 0x178);
+
+ ST7701_SPI(st7701, DSI_CMD2_BK1_MIPISET1, 0x188);
+
+ ST7701_SPI(st7701, 0xE0, 0x100, 0x100, 0x102);
+
+ ST7701_SPI(st7701, 0xE1,
+ 0x103, 0x1A0, 0x100, 0x100, 0x104, 0x1A0, 0x100, 0x100,
+ 0x100, 0x120, 0x120);
+
+ ST7701_SPI(st7701, 0xE2,
+ 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100,
+ 0x100, 0x100, 0x100, 0x100, 0x100);
+
+ ST7701_SPI(st7701, 0xE3, 0x100, 0x100, 0x111, 0x100);
+
+ ST7701_SPI(st7701, 0xE4, 0x122, 0x100);
+
+ ST7701_SPI(st7701, 0xE5,
+ 0x105, 0x1EC, 0x1A0, 0x1A0, 0x107, 0x1EE, 0x1A0, 0x1A0,
+ 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100);
+
+ ST7701_SPI(st7701, 0xE6, 0x100, 0x100, 0x111, 0x100);
+
+ ST7701_SPI(st7701, 0xE7, 0x122, 0x100);
+
+ ST7701_SPI(st7701, 0xE8,
+ 0x106, 0x1ED, 0x1A0, 0x1A0, 0x108, 0x1EF, 0x1A0, 0x1A0,
+ 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100, 0x100);
+
+ ST7701_SPI(st7701, 0xEB,
+ 0x100, 0x100, 0x140, 0x140, 0x100, 0x100, 0x100);
+
+ ST7701_SPI(st7701, 0xED,
+ 0x1FF, 0x1FF, 0x1FF, 0x1BA, 0x10A, 0x1BF, 0x145, 0x1FF,
+ 0x1FF, 0x154, 0x1FB, 0x1A0, 0x1AB, 0x1FF, 0x1FF, 0x1FF);
+
+ ST7701_SPI(st7701, 0xEF, 0x110, 0x10D, 0x104, 0x108, 0x13F, 0x11F);
+
+ ST7701_SPI(st7701, DSI_CMD2BKX_SEL,
+ 0x177, 0x101, 0x100, 0x100, SPI_CMD2BK3_SEL);
+
+ ST7701_SPI(st7701, 0xEF, 0x108);
+
+ ST7701_SPI(st7701, DSI_CMD2BKX_SEL,
+ 0x177, 0x101, 0x100, 0x100, SPI_CMD2BKX_SEL_NONE);
+
+ ST7701_SPI(st7701, 0xCD, 0x108); /* RGB format COLCTRL */
+
+ ST7701_SPI(st7701, 0x36, 0x108); /* MadCtl */
+
+ ST7701_SPI(st7701, 0x3A, 0x166); /* Colmod */
+
+ ST7701_SPI(st7701, MIPI_DCS_EXIT_SLEEP_MODE);
+}
+
static int st7701_prepare(struct drm_panel *panel)
{
struct st7701 *st7701 = panel_to_st7701(panel);
gpiod_set_value(st7701->reset, 1);
msleep(150);
- st7701_init_sequence(st7701);
+ st7701->desc->init_sequence(st7701);
return 0;
}
{
struct st7701 *st7701 = panel_to_st7701(panel);
- ST7701_DSI(st7701, MIPI_DCS_SET_DISPLAY_ON, 0x00);
+ switch (st7701->desc->interface) {
+ case ST7701_CTRL_DSI:
+ ST7701_DSI(st7701, MIPI_DCS_SET_DISPLAY_ON, 0x00);
+ break;
+ case ST7701_CTRL_SPI:
+ ST7701_SPI(st7701, MIPI_DCS_SET_DISPLAY_ON);
+ msleep(30);
+ break;
+ }
return 0;
}
{
struct st7701 *st7701 = panel_to_st7701(panel);
- ST7701_DSI(st7701, MIPI_DCS_SET_DISPLAY_OFF, 0x00);
+ switch (st7701->desc->interface) {
+ case ST7701_CTRL_DSI:
+ ST7701_DSI(st7701, MIPI_DCS_SET_DISPLAY_OFF, 0x00);
+ break;
+ case ST7701_CTRL_SPI:
+ ST7701_SPI(st7701, MIPI_DCS_SET_DISPLAY_OFF);
+ break;
+ }
return 0;
}
{
struct st7701 *st7701 = panel_to_st7701(panel);
- ST7701_DSI(st7701, MIPI_DCS_ENTER_SLEEP_MODE, 0x00);
+ switch (st7701->desc->interface) {
+ case ST7701_CTRL_DSI:
+ ST7701_DSI(st7701, MIPI_DCS_ENTER_SLEEP_MODE, 0x00);
+ break;
+ case ST7701_CTRL_SPI:
+ ST7701_SPI(st7701, MIPI_DCS_ENTER_SLEEP_MODE);
+ break;
+ }
msleep(st7701->sleep_delay);
mode = drm_mode_duplicate(connector->dev, desc_mode);
if (!mode) {
- dev_err(&st7701->dsi->dev, "failed to add mode %ux%u@%u\n",
+ dev_err(st7701->dev, "failed to add mode %ux%u@%u\n",
desc_mode->hdisplay, desc_mode->vdisplay,
drm_mode_vrefresh(desc_mode));
return -ENOMEM;
drm_mode_set_name(mode);
drm_mode_probed_add(connector, mode);
+ if (st7701->desc->mediabus_format)
+ drm_display_info_set_bus_formats(&connector->display_info,
+ &st7701->desc->mediabus_format,
+ 1);
+ connector->display_info.bus_flags = 0;
+
connector->display_info.width_mm = desc_mode->width_mm;
connector->display_info.height_mm = desc_mode->height_mm;
+ if (st7701->desc->bus_flags)
+ connector->display_info.bus_flags = st7701->desc->bus_flags;
+
return 1;
}
.supply_names = ts8550b_supply_names,
.num_supplies = ARRAY_SIZE(ts8550b_supply_names),
.panel_sleep_delay = 80, /* panel need extra 80ms for sleep out cmd */
+ .init_sequence = ts8550b_init_sequence,
+ .conn_type = DRM_MODE_CONNECTOR_DSI,
+ .interface = ST7701_CTRL_DSI,
};
-static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
+static const struct drm_display_mode txw210001b0_mode = {
+ .clock = 19200,
+
+ .hdisplay = 480,
+ .hsync_start = 480 + 10,
+ .hsync_end = 480 + 10 + 16,
+ .htotal = 480 + 10 + 16 + 56,
+
+ .vdisplay = 480,
+ .vsync_start = 480 + 15,
+ .vsync_end = 480 + 15 + 60,
+ .vtotal = 480 + 15 + 60 + 15,
+
+ .width_mm = 53,
+ .height_mm = 53,
+ .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
+
+ .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
+};
+
+static const struct st7701_panel_desc txw210001b0_desc = {
+ .mode = &txw210001b0_mode,
+ .mediabus_format = MEDIA_BUS_FMT_RGB888_1X24,
+ .supply_names = ts8550b_supply_names,
+ .num_supplies = ARRAY_SIZE(ts8550b_supply_names),
+ .init_sequence = txw210001b0_init_sequence,
+ .conn_type = DRM_MODE_CONNECTOR_DPI,
+ .interface = ST7701_CTRL_SPI,
+ .bus_flags = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
+};
+
+static const struct st7701_panel_desc hyperpixel2r_desc = {
+ .mode = &txw210001b0_mode,
+ .mediabus_format = MEDIA_BUS_FMT_RGB666_1X24_CPADHI,
+ .supply_names = ts8550b_supply_names,
+ .num_supplies = ARRAY_SIZE(ts8550b_supply_names),
+ .init_sequence = txw210001b0_init_sequence,
+ .conn_type = DRM_MODE_CONNECTOR_DPI,
+ .interface = ST7701_CTRL_SPI,
+ .bus_flags = DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE,
+};
+
+static int st7701_probe(struct device *dev, struct st7701 **ret_st7701)
{
const struct st7701_panel_desc *desc;
struct st7701 *st7701;
int ret, i;
- st7701 = devm_kzalloc(&dsi->dev, sizeof(*st7701), GFP_KERNEL);
+ st7701 = devm_kzalloc(dev, sizeof(*st7701), GFP_KERNEL);
if (!st7701)
return -ENOMEM;
- desc = of_device_get_match_data(&dsi->dev);
- dsi->mode_flags = desc->flags;
- dsi->format = desc->format;
- dsi->lanes = desc->lanes;
+ desc = of_device_get_match_data(dev);
+ if (!desc)
+ return -EINVAL;
- st7701->supplies = devm_kcalloc(&dsi->dev, desc->num_supplies,
+ st7701->supplies = devm_kcalloc(dev, desc->num_supplies,
sizeof(*st7701->supplies),
GFP_KERNEL);
if (!st7701->supplies)
for (i = 0; i < desc->num_supplies; i++)
st7701->supplies[i].supply = desc->supply_names[i];
- ret = devm_regulator_bulk_get(&dsi->dev, desc->num_supplies,
+ ret = devm_regulator_bulk_get(dev, desc->num_supplies,
st7701->supplies);
if (ret < 0)
return ret;
- st7701->reset = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW);
+ st7701->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(st7701->reset)) {
- dev_err(&dsi->dev, "Couldn't get our reset GPIO\n");
+ dev_err(dev, "Couldn't get our reset GPIO\n");
return PTR_ERR(st7701->reset);
}
- drm_panel_init(&st7701->panel, &dsi->dev, &st7701_funcs,
- DRM_MODE_CONNECTOR_DSI);
+ drm_panel_init(&st7701->panel, dev, &st7701_funcs,
+ desc->conn_type);
/**
* Once sleep out has been issued, ST7701 IC required to wait 120ms
drm_panel_add(&st7701->panel);
+ st7701->desc = desc;
+ st7701->dev = dev;
+
+ *ret_st7701 = st7701;
+
+ return 0;
+}
+
+static int st7701_dsi_probe(struct mipi_dsi_device *dsi)
+{
+ struct st7701 *st7701;
+ int ret;
+
+ ret = st7701_probe(&dsi->dev, &st7701);
+
+ if (ret)
+ return ret;
+
+ dsi->mode_flags = st7701->desc->flags;
+ dsi->format = st7701->desc->format;
+ dsi->lanes = st7701->desc->lanes;
+
mipi_dsi_set_drvdata(dsi, st7701);
st7701->dsi = dsi;
- st7701->desc = desc;
return mipi_dsi_attach(dsi);
}
return 0;
}
-static const struct of_device_id st7701_of_match[] = {
+static const struct of_device_id st7701_dsi_of_match[] = {
{ .compatible = "techstar,ts8550b", .data = &ts8550b_desc },
{ }
};
-MODULE_DEVICE_TABLE(of, st7701_of_match);
+MODULE_DEVICE_TABLE(of, st7701_dsi_of_match);
static struct mipi_dsi_driver st7701_dsi_driver = {
.probe = st7701_dsi_probe,
.remove = st7701_dsi_remove,
.driver = {
.name = "st7701",
- .of_match_table = st7701_of_match,
+ .of_match_table = st7701_dsi_of_match,
+ },
+};
+
+/* SPI display probe */
+static const struct of_device_id st7701_spi_of_match[] = {
+ { .compatible = "txw,txw210001b0",
+ .data = &txw210001b0_desc,
+ }, {
+ .compatible = "pimoroni,hyperpixel2round",
+ .data = &hyperpixel2r_desc,
+ }, {
+ /* sentinel */
+ }
+};
+MODULE_DEVICE_TABLE(of, st7701_spi_of_match);
+
+static int st7701_spi_probe(struct spi_device *spi)
+{
+ struct st7701 *st7701;
+ int ret;
+
+ spi->mode = SPI_MODE_3;
+ spi->bits_per_word = 9;
+ ret = spi_setup(spi);
+ if (ret < 0) {
+ dev_err(&spi->dev, "failed to setup SPI: %d\n", ret);
+ return ret;
+ }
+
+ ret = st7701_probe(&spi->dev, &st7701);
+
+ if (ret)
+ return ret;
+
+ spi_set_drvdata(spi, st7701);
+ st7701->spi = spi;
+
+ return 0;
+}
+
+static int st7701_spi_remove(struct spi_device *spi)
+{
+ struct st7701 *ctx = spi_get_drvdata(spi);
+
+ drm_panel_remove(&ctx->panel);
+
+ return 0;
+}
+
+static const struct spi_device_id st7701_spi_ids[] = {
+ { "txw210001b0", 0 },
+ { "hyperpixel2round", 0 },
+ { /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(spi, st7701_spi_ids);
+
+static struct spi_driver st7701_spi_driver = {
+ .probe = st7701_spi_probe,
+ .remove = st7701_spi_remove,
+ .driver = {
+ .name = "st7701",
+ .of_match_table = st7701_spi_of_match,
},
+ .id_table = st7701_spi_ids,
};
-module_mipi_dsi_driver(st7701_dsi_driver);
+
+static int __init panel_st7701_init(void)
+{
+ int err;
+
+ err = spi_register_driver(&st7701_spi_driver);
+ if (err < 0)
+ return err;
+
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI)) {
+ err = mipi_dsi_driver_register(&st7701_dsi_driver);
+ if (err < 0)
+ goto err_did_spi_register;
+ }
+
+ return 0;
+
+err_did_spi_register:
+ spi_unregister_driver(&st7701_spi_driver);
+
+ return err;
+}
+module_init(panel_st7701_init);
+
+static void __exit panel_st7701_exit(void)
+{
+ if (IS_ENABLED(CONFIG_DRM_MIPI_DSI))
+ mipi_dsi_driver_unregister(&st7701_dsi_driver);
+
+ spi_unregister_driver(&st7701_spi_driver);
+}
+module_exit(panel_st7701_exit);
MODULE_AUTHOR("Jagan Teki <jagan@amarulasolutions.com>");
MODULE_DESCRIPTION("Sitronix ST7701 LCD Panel Driver");
projects / platform / kernel / linux-rpi.git / commitdiff