diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-lg-ld070wx3.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-lg-ld070wx3.c | 184 |
1 files changed, 184 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-lg-ld070wx3.c b/drivers/gpu/drm/panel/panel-lg-ld070wx3.c new file mode 100644 index 000000000000..00cbfc5518a5 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-lg-ld070wx3.c @@ -0,0 +1,184 @@ +// SPDX-License-Identifier: GPL-2.0-only + +#include <linux/array_size.h> +#include <linux/delay.h> +#include <linux/err.h> +#include <linux/gpio/consumer.h> +#include <linux/mod_devicetable.h> +#include <linux/module.h> +#include <linux/property.h> +#include <linux/regulator/consumer.h> + +#include <video/mipi_display.h> + +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> +#include <drm/drm_probe_helper.h> + +static const struct regulator_bulk_data lg_ld070wx3_supplies[] = { + { .supply = "vdd" }, { .supply = "vcc" }, +}; + +struct lg_ld070wx3 { + struct drm_panel panel; + struct mipi_dsi_device *dsi; + + struct regulator_bulk_data *supplies; +}; + +static inline struct lg_ld070wx3 *to_lg_ld070wx3(struct drm_panel *panel) +{ + return container_of(panel, struct lg_ld070wx3, panel); +} + +static int lg_ld070wx3_prepare(struct drm_panel *panel) +{ + struct lg_ld070wx3 *priv = to_lg_ld070wx3(panel); + struct mipi_dsi_multi_context ctx = { .dsi = priv->dsi }; + struct device *dev = panel->dev; + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(lg_ld070wx3_supplies), priv->supplies); + if (ret < 0) { + dev_err(dev, "failed to enable power supplies: %d\n", ret); + return ret; + } + + /* + * According to spec delay between enabling supply is 0, + * for regulators to reach required voltage ~5ms needed. + * MIPI interface signal for setup requires additional + * 110ms which in total results in 115ms. + */ + mdelay(115); + + mipi_dsi_dcs_soft_reset_multi(&ctx); + mipi_dsi_msleep(&ctx, 20); + + /* Differential input impedance selection */ + mipi_dsi_dcs_write_seq_multi(&ctx, 0xae, 0x0b); + + /* Enter test mode 1 and 2*/ + mipi_dsi_dcs_write_seq_multi(&ctx, 0xee, 0xea); + mipi_dsi_dcs_write_seq_multi(&ctx, 0xef, 0x5f); + + /* Increased MIPI CLK driving ability */ + mipi_dsi_dcs_write_seq_multi(&ctx, 0xf2, 0x68); + + /* Exit test mode 1 and 2 */ + mipi_dsi_dcs_write_seq_multi(&ctx, 0xee, 0x00); + mipi_dsi_dcs_write_seq_multi(&ctx, 0xef, 0x00); + + return ctx.accum_err; +} + +static int lg_ld070wx3_unprepare(struct drm_panel *panel) +{ + struct lg_ld070wx3 *priv = to_lg_ld070wx3(panel); + struct mipi_dsi_multi_context ctx = { .dsi = priv->dsi }; + + mipi_dsi_dcs_enter_sleep_mode_multi(&ctx); + + msleep(50); + + regulator_bulk_disable(ARRAY_SIZE(lg_ld070wx3_supplies), priv->supplies); + + /* power supply must be off for at least 1s after panel disable */ + msleep(1000); + + return 0; +} + +static const struct drm_display_mode lg_ld070wx3_mode = { + .clock = (800 + 32 + 48 + 8) * (1280 + 5 + 3 + 1) * 60 / 1000, + .hdisplay = 800, + .hsync_start = 800 + 32, + .hsync_end = 800 + 32 + 48, + .htotal = 800 + 32 + 48 + 8, + .vdisplay = 1280, + .vsync_start = 1280 + 5, + .vsync_end = 1280 + 5 + 3, + .vtotal = 1280 + 5 + 3 + 1, + .width_mm = 94, + .height_mm = 151, + .type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED, +}; + +static int lg_ld070wx3_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + return drm_connector_helper_get_modes_fixed(connector, &lg_ld070wx3_mode); +} + +static const struct drm_panel_funcs lg_ld070wx3_panel_funcs = { + .prepare = lg_ld070wx3_prepare, + .unprepare = lg_ld070wx3_unprepare, + .get_modes = lg_ld070wx3_get_modes, +}; + +static int lg_ld070wx3_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + struct lg_ld070wx3 *priv; + int ret; + + priv = devm_drm_panel_alloc(dev, struct lg_ld070wx3, panel, + &lg_ld070wx3_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + if (IS_ERR(priv)) + return PTR_ERR(priv); + + ret = devm_regulator_bulk_get_const(dev, ARRAY_SIZE(lg_ld070wx3_supplies), + lg_ld070wx3_supplies, &priv->supplies); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to get supplies\n"); + + priv->dsi = dsi; + mipi_dsi_set_drvdata(dsi, priv); + + dsi->lanes = 4; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_LPM; + + ret = drm_panel_of_backlight(&priv->panel); + if (ret < 0) + return dev_err_probe(dev, ret, "failed to get backlight\n"); + + drm_panel_add(&priv->panel); + + ret = devm_mipi_dsi_attach(dev, dsi); + if (ret < 0) { + drm_panel_remove(&priv->panel); + return dev_err_probe(dev, ret, "failed to attach to DSI host\n"); + } + + return 0; +} + +static void lg_ld070wx3_remove(struct mipi_dsi_device *dsi) +{ + struct lg_ld070wx3 *priv = mipi_dsi_get_drvdata(dsi); + + drm_panel_remove(&priv->panel); +} + +static const struct of_device_id lg_ld070wx3_of_match[] = { + { .compatible = "lg,ld070wx3-sl01" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, lg_ld070wx3_of_match); + +static struct mipi_dsi_driver lg_ld070wx3_driver = { + .driver = { + .name = "panel-lg-ld070wx3", + .of_match_table = lg_ld070wx3_of_match, + }, + .probe = lg_ld070wx3_probe, + .remove = lg_ld070wx3_remove, +}; +module_mipi_dsi_driver(lg_ld070wx3_driver); + +MODULE_AUTHOR("Svyatoslav Ryhel <clamor95@gmail.com>"); +MODULE_DESCRIPTION("LG LD070WX3-SL01 DSI panel driver"); +MODULE_LICENSE("GPL"); |