diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
---|---|---|
committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-11 08:27:49 +0000 |
commit | ace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch) | |
tree | b2d64bc10158fdd5497876388cd68142ca374ed3 /drivers/gpu/drm/panel/panel-orisetech-ota5601a.c | |
parent | Initial commit. (diff) | |
download | linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip |
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/gpu/drm/panel/panel-orisetech-ota5601a.c')
-rw-r--r-- | drivers/gpu/drm/panel/panel-orisetech-ota5601a.c | 363 |
1 files changed, 363 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-orisetech-ota5601a.c b/drivers/gpu/drm/panel/panel-orisetech-ota5601a.c new file mode 100644 index 0000000000..c415dacf18 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-orisetech-ota5601a.c @@ -0,0 +1,363 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Orisetech OTA5601A TFT LCD panel driver + * + * Copyright (C) 2021, Christophe Branchereau <cbranchereau@gmail.com> + */ + +#include <linux/bits.h> +#include <linux/delay.h> +#include <linux/device.h> +#include <linux/gpio/consumer.h> +#include <linux/media-bus-format.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/regmap.h> +#include <linux/regulator/consumer.h> +#include <linux/spi/spi.h> + +#include <drm/drm_modes.h> +#include <drm/drm_panel.h> + +#define OTA5601A_CTL 0x01 +#define OTA5601A_CTL_OFF 0x00 +#define OTA5601A_CTL_ON BIT(0) + +struct ota5601a_panel_info { + const struct drm_display_mode *display_modes; + unsigned int num_modes; + u16 width_mm, height_mm; + u32 bus_format, bus_flags; +}; + +struct ota5601a { + struct drm_panel drm_panel; + struct regmap *map; + struct regulator *supply; + const struct ota5601a_panel_info *panel_info; + + struct gpio_desc *reset_gpio; +}; + +static inline struct ota5601a *to_ota5601a(struct drm_panel *panel) +{ + return container_of(panel, struct ota5601a, drm_panel); +} + +static const struct reg_sequence ota5601a_panel_regs[] = { + { 0xfd, 0x00 }, /* Page Shift */ + { 0x02, 0x00 }, /* Reset */ + + { 0x18, 0x00 }, /* Interface Sel: RGB 24 Bits */ + { 0x34, 0x20 }, /* Undocumented */ + + { 0x0c, 0x01 }, /* Contrast set by CMD1 == within page 0x00 */ + { 0x0d, 0x48 }, /* R Brightness */ + { 0x0e, 0x48 }, /* G Brightness */ + { 0x0f, 0x48 }, /* B Brightness */ + { 0x07, 0x40 }, /* R Contrast */ + { 0x08, 0x33 }, /* G Contrast */ + { 0x09, 0x3a }, /* B Contrast */ + + { 0x16, 0x01 }, /* NTSC Sel */ + { 0x19, 0x8d }, /* VBLK */ + { 0x1a, 0x28 }, /* HBLK */ + { 0x1c, 0x00 }, /* Scan Shift Dir. */ + + { 0xfd, 0xc5 }, /* Page Shift */ + { 0x82, 0x0c }, /* PWR_CTRL Pump */ + { 0xa2, 0xb4 }, /* PWR_CTRL VGH/VGL */ + + { 0xfd, 0xc4 }, /* Page Shift - What follows is listed as "RGB 24bit Timing Set" */ + { 0x82, 0x45 }, + + { 0xfd, 0xc1 }, + { 0x91, 0x02 }, + + { 0xfd, 0xc0 }, + { 0xa1, 0x01 }, + { 0xa2, 0x1f }, + { 0xa3, 0x0b }, + { 0xa4, 0x38 }, + { 0xa5, 0x00 }, + { 0xa6, 0x0a }, + { 0xa7, 0x38 }, + { 0xa8, 0x00 }, + { 0xa9, 0x0a }, + { 0xaa, 0x37 }, + + { 0xfd, 0xce }, + { 0x81, 0x18 }, + { 0x82, 0x43 }, + { 0x83, 0x43 }, + { 0x91, 0x06 }, + { 0x93, 0x38 }, + { 0x94, 0x02 }, + { 0x95, 0x06 }, + { 0x97, 0x38 }, + { 0x98, 0x02 }, + { 0x99, 0x06 }, + { 0x9b, 0x38 }, + { 0x9c, 0x02 }, + + { 0xfd, 0x00 }, /* Page Shift */ +}; + +static const struct regmap_config ota5601a_regmap_config = { + .reg_bits = 8, + .val_bits = 8, +}; + +static int ota5601a_prepare(struct drm_panel *drm_panel) +{ + struct ota5601a *panel = to_ota5601a(drm_panel); + int err; + + err = regulator_enable(panel->supply); + if (err) { + dev_err(drm_panel->dev, "Failed to enable power supply: %d\n", err); + return err; + } + + /* Reset to be held low for 10us min according to the doc, 10ms before sending commands */ + gpiod_set_value_cansleep(panel->reset_gpio, 1); + usleep_range(10, 30); + gpiod_set_value_cansleep(panel->reset_gpio, 0); + usleep_range(10000, 20000); + + /* Init all registers. */ + err = regmap_multi_reg_write(panel->map, ota5601a_panel_regs, + ARRAY_SIZE(ota5601a_panel_regs)); + if (err) { + dev_err(drm_panel->dev, "Failed to init registers: %d\n", err); + goto err_disable_regulator; + } + + msleep(120); + + return 0; + +err_disable_regulator: + regulator_disable(panel->supply); + return err; +} + +static int ota5601a_unprepare(struct drm_panel *drm_panel) +{ + struct ota5601a *panel = to_ota5601a(drm_panel); + + gpiod_set_value_cansleep(panel->reset_gpio, 1); + + regulator_disable(panel->supply); + + return 0; +} + +static int ota5601a_enable(struct drm_panel *drm_panel) +{ + struct ota5601a *panel = to_ota5601a(drm_panel); + int err; + + err = regmap_write(panel->map, OTA5601A_CTL, OTA5601A_CTL_ON); + + if (err) { + dev_err(drm_panel->dev, "Unable to enable panel: %d\n", err); + return err; + } + + if (drm_panel->backlight) { + /* Wait for the picture to be ready before enabling backlight */ + msleep(120); + } + + return 0; +} + +static int ota5601a_disable(struct drm_panel *drm_panel) +{ + struct ota5601a *panel = to_ota5601a(drm_panel); + int err; + + err = regmap_write(panel->map, OTA5601A_CTL, OTA5601A_CTL_OFF); + + if (err) { + dev_err(drm_panel->dev, "Unable to disable panel: %d\n", err); + return err; + } + + return 0; +} + +static int ota5601a_get_modes(struct drm_panel *drm_panel, + struct drm_connector *connector) +{ + struct ota5601a *panel = to_ota5601a(drm_panel); + const struct ota5601a_panel_info *panel_info = panel->panel_info; + struct drm_display_mode *mode; + unsigned int i; + + for (i = 0; i < panel_info->num_modes; i++) { + mode = drm_mode_duplicate(connector->dev, + &panel_info->display_modes[i]); + if (!mode) + return -ENOMEM; + + drm_mode_set_name(mode); + + mode->type = DRM_MODE_TYPE_DRIVER; + if (panel_info->num_modes == 1) + mode->type |= DRM_MODE_TYPE_PREFERRED; + + drm_mode_probed_add(connector, mode); + } + + connector->display_info.bpc = 8; + connector->display_info.width_mm = panel_info->width_mm; + connector->display_info.height_mm = panel_info->height_mm; + + drm_display_info_set_bus_formats(&connector->display_info, + &panel_info->bus_format, 1); + connector->display_info.bus_flags = panel_info->bus_flags; + + return panel_info->num_modes; +} + +static const struct drm_panel_funcs ota5601a_funcs = { + .prepare = ota5601a_prepare, + .unprepare = ota5601a_unprepare, + .enable = ota5601a_enable, + .disable = ota5601a_disable, + .get_modes = ota5601a_get_modes, +}; + +static int ota5601a_probe(struct spi_device *spi) +{ + const struct spi_device_id *id = spi_get_device_id(spi); + struct device *dev = &spi->dev; + struct ota5601a *panel; + int err; + + panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL); + if (!panel) + return -ENOMEM; + + spi_set_drvdata(spi, panel); + + panel->panel_info = (const struct ota5601a_panel_info *)id->driver_data; + if (!panel->panel_info) + return -EINVAL; + + panel->supply = devm_regulator_get(dev, "power"); + if (IS_ERR(panel->supply)) { + dev_err(dev, "Failed to get power supply\n"); + return PTR_ERR(panel->supply); + } + + panel->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(panel->reset_gpio)) { + dev_err(dev, "Failed to get reset GPIO\n"); + return PTR_ERR(panel->reset_gpio); + } + + spi->bits_per_word = 8; + spi->mode = SPI_MODE_3 | SPI_3WIRE; + err = spi_setup(spi); + if (err) { + dev_err(dev, "Failed to setup SPI\n"); + return err; + } + + panel->map = devm_regmap_init_spi(spi, &ota5601a_regmap_config); + if (IS_ERR(panel->map)) { + dev_err(dev, "Failed to init regmap\n"); + return PTR_ERR(panel->map); + } + + drm_panel_init(&panel->drm_panel, dev, &ota5601a_funcs, + DRM_MODE_CONNECTOR_DPI); + + err = drm_panel_of_backlight(&panel->drm_panel); + if (err) { + if (err != -EPROBE_DEFER) + dev_err(dev, "Failed to get backlight handle\n"); + return err; + } + + drm_panel_add(&panel->drm_panel); + + return 0; +} + +static void ota5601a_remove(struct spi_device *spi) +{ + struct ota5601a *panel = spi_get_drvdata(spi); + + drm_panel_remove(&panel->drm_panel); + + ota5601a_disable(&panel->drm_panel); + ota5601a_unprepare(&panel->drm_panel); +} + +static const struct drm_display_mode gpt3_display_modes[] = { + { /* 60 Hz */ + .clock = 27000, + .hdisplay = 640, + .hsync_start = 640 + 220, + .hsync_end = 640 + 220 + 20, + .htotal = 640 + 220 + 20 + 20, + .vdisplay = 480, + .vsync_start = 480 + 7, + .vsync_end = 480 + 7 + 6, + .vtotal = 480 + 7 + 6 + 7, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, + + { /* 50 Hz */ + .clock = 24000, + .hdisplay = 640, + .hsync_start = 640 + 280, + .hsync_end = 640 + 280 + 20, + .htotal = 640 + 280 + 20 + 20, + .vdisplay = 480, + .vsync_start = 480 + 7, + .vsync_end = 480 + 7 + 6, + .vtotal = 480 + 7 + 6 + 7, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, +}; + +static const struct ota5601a_panel_info gpt3_info = { + .display_modes = gpt3_display_modes, + .num_modes = ARRAY_SIZE(gpt3_display_modes), + .width_mm = 71, + .height_mm = 51, + .bus_format = MEDIA_BUS_FMT_RGB888_1X24, + .bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE, +}; + +static const struct spi_device_id gpt3_id[] = { + { "gpt3", (kernel_ulong_t)&gpt3_info }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(spi, gpt3_id); + +static const struct of_device_id ota5601a_of_match[] = { + { .compatible = "focaltech,gpt3" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, ota5601a_of_match); + +static struct spi_driver ota5601a_driver = { + .driver = { + .name = "ota5601a", + .of_match_table = ota5601a_of_match, + }, + .id_table = gpt3_id, + .probe = ota5601a_probe, + .remove = ota5601a_remove, +}; + +module_spi_driver(ota5601a_driver); + +MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>"); +MODULE_LICENSE("GPL"); |