#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <drm/drm_mipi_dsi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#include <drm/drm_probe_helper.h>
struct ota7290b {
struct drm_panel panel;
struct mipi_dsi_device *dsi;
struct regulator *power;
struct gpio_desc *reset;
struct regulator *avdd;
struct regulator *vdd;
struct regulator *vcc;
enum drm_panel_orientation orientation;
};
static inline struct ota7290b *panel_to_ota(struct drm_panel *panel)
{
return container_of(panel, struct ota7290b, panel);
}
static int ota7290b_prepare(struct drm_panel *panel)
{
struct ota7290b *ctx = panel_to_ota(panel);
struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
int ret;
if (ctx->vcc) {
ret = regulator_enable(ctx->vcc);
if (ret)
dev_err(panel->dev, "failed to enable VCC regulator: %d\n", ret);
}
if (ctx->reset) {
gpiod_set_value_cansleep(ctx->reset, 0);
msleep(60);
gpiod_set_value_cansleep(ctx->reset, 1);
msleep(60);
}
if (ctx->vdd) {
ret = regulator_enable(ctx->vdd);
if (ret)
dev_err(panel->dev, "failed to enable VDD regulator: %d\n", ret);
}
if (ctx->reset) {
gpiod_set_value_cansleep(ctx->reset, 0);
msleep(60);
}
if (ctx->avdd) {
ret = regulator_enable(ctx->avdd);
if (ret)
dev_err(panel->dev, "failed to enable AVDD regulator: %d\n", ret);
}
mipi_dsi_dcs_exit_sleep_mode_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 120);
mipi_dsi_dcs_set_display_on_multi(&dsi_ctx);
mipi_dsi_msleep(&dsi_ctx, 50);
if (dsi_ctx.accum_err < 0)
dev_err(panel->dev, "failed to init panel: %d\n", dsi_ctx.accum_err);
return dsi_ctx.accum_err;
}
static int ota7290b_unprepare(struct drm_panel *panel)
{
struct ota7290b *ctx = panel_to_ota(panel);
struct mipi_dsi_multi_context dsi_ctx = { .dsi = ctx->dsi };
mipi_dsi_dcs_set_display_off_multi(&dsi_ctx);
mipi_dsi_dcs_enter_sleep_mode_multi(&dsi_ctx);
if (ctx->avdd)
regulator_disable(ctx->avdd);
if (ctx->reset) {
gpiod_set_value_cansleep(ctx->reset, 1);
msleep(5);
}
if (ctx->vdd)
regulator_disable(ctx->vdd);
if (ctx->vcc)
regulator_disable(ctx->vcc);
return 0;
}
static const struct drm_display_mode waveshare_dsi_touch_8_8_a_mode = {
.clock = 75000,
.hdisplay = 480,
.hsync_start = 480 + 50,
.hsync_end = 480 + 50 + 50,
.htotal = 480 + 50 + 50 + 50,
.vdisplay = 1920,
.vsync_start = 1920 + 20,
.vsync_end = 1920 + 20 + 20,
.vtotal = 1920 + 20 + 20 + 20,
.width_mm = 68,
.height_mm = 219,
.type = DRM_MODE_TYPE_DRIVER,
};
static int ota7290b_get_modes(struct drm_panel *panel,
struct drm_connector *connector)
{
return drm_connector_helper_get_modes_fixed(connector, &waveshare_dsi_touch_8_8_a_mode);
}
static enum drm_panel_orientation ota7290b_get_orientation(struct drm_panel *panel)
{
struct ota7290b *ctx = panel_to_ota(panel);
return ctx->orientation;
}
static const struct drm_panel_funcs ota7290b_funcs = {
.prepare = ota7290b_prepare,
.unprepare = ota7290b_unprepare,
.get_modes = ota7290b_get_modes,
.get_orientation = ota7290b_get_orientation,
};
static int ota7290b_probe(struct mipi_dsi_device *dsi)
{
struct ota7290b *ctx;
int ret;
ctx = devm_drm_panel_alloc(&dsi->dev, struct ota7290b, panel,
&ota7290b_funcs,
DRM_MODE_CONNECTOR_DSI);
if (IS_ERR(ctx))
return PTR_ERR(ctx);
mipi_dsi_set_drvdata(dsi, ctx);
ctx->dsi = dsi;
ctx->reset = devm_gpiod_get_optional(&dsi->dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(ctx->reset))
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->reset),
"Couldn't get our reset GPIO\n");
ctx->vcc = devm_regulator_get_optional(&dsi->dev, "vcc");
if (IS_ERR(ctx->vcc))
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->vcc),
"Couldn't get our VCC supply\n");
ctx->avdd = devm_regulator_get_optional(&dsi->dev, "avdd");
if (IS_ERR(ctx->avdd))
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->avdd),
"Couldn't get our AVDD supply\n");
ctx->vdd = devm_regulator_get_optional(&dsi->dev, "vdd");
if (IS_ERR(ctx->vdd))
return dev_err_probe(&dsi->dev, PTR_ERR(ctx->vdd),
"Couldn't get our VDD supply\n");
ret = of_drm_get_panel_orientation(dsi->dev.of_node, &ctx->orientation);
if (ret) {
dev_err(&dsi->dev, "%pOF: failed to get orientation: %d\n",
dsi->dev.of_node, ret);
return ret;
}
ret = drm_panel_of_backlight(&ctx->panel);
if (ret)
return ret;
ctx->panel.prepare_prev_first = true;
ret = devm_drm_panel_add(&dsi->dev, &ctx->panel);
if (ret)
return ret;
dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_HSE |
MIPI_DSI_MODE_LPM | MIPI_DSI_CLOCK_NON_CONTINUOUS,
dsi->format = MIPI_DSI_FMT_RGB888,
dsi->lanes = 2;
return devm_mipi_dsi_attach(&dsi->dev, dsi);
}
static const struct of_device_id ota7290b_of_match[] = {
{ .compatible = "waveshare,8.8-dsi-touch-a", },
{}
};
MODULE_DEVICE_TABLE(of, ota7290b_of_match);
static struct mipi_dsi_driver ota7290b_driver = {
.probe = ota7290b_probe,
.driver = {
.name = "focaltech-ota7290b",
.of_match_table = ota7290b_of_match,
},
};
module_mipi_dsi_driver(ota7290b_driver);
MODULE_DESCRIPTION("Panel driver for Focaltech OTA7290B panels");
MODULE_LICENSE("GPL");
