diff options
Diffstat (limited to 'drivers/gpu/drm/panel/panel-abt-y030xx067a.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-abt-y030xx067a.c | 383 |
1 files changed, 383 insertions, 0 deletions
diff --git a/drivers/gpu/drm/panel/panel-abt-y030xx067a.c b/drivers/gpu/drm/panel/panel-abt-y030xx067a.c new file mode 100644 index 000000000..1cc0f1d09 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-abt-y030xx067a.c @@ -0,0 +1,383 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Asia Better Technology Ltd. Y030XX067A IPS LCD panel driver + * + * Copyright (C) 2020, Paul Cercueil <paul@crapouillou.net> + * Copyright (C) 2020, Christophe Branchereau <cbranchereau@gmail.com> + */ + +#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_device.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 REG00_VBRT_CTRL(val) (val) + +#define REG01_COM_DC(val) (val) + +#define REG02_DA_CONTRAST(val) (val) +#define REG02_VESA_SEL(val) ((val) << 5) +#define REG02_COMDC_SW BIT(7) + +#define REG03_VPOSITION(val) (val) +#define REG03_BSMOUNT BIT(5) +#define REG03_COMTST BIT(6) +#define REG03_HPOSITION1 BIT(7) + +#define REG04_HPOSITION1(val) (val) + +#define REG05_CLIP BIT(0) +#define REG05_NVM_VREFRESH BIT(1) +#define REG05_SLFR BIT(2) +#define REG05_SLBRCHARGE(val) ((val) << 3) +#define REG05_PRECHARGE_LEVEL(val) ((val) << 6) + +#define REG06_TEST5 BIT(0) +#define REG06_SLDWN BIT(1) +#define REG06_SLRGT BIT(2) +#define REG06_TEST2 BIT(3) +#define REG06_XPSAVE BIT(4) +#define REG06_GAMMA_SEL(val) ((val) << 5) +#define REG06_NT BIT(7) + +#define REG07_TEST1 BIT(0) +#define REG07_HDVD_POL BIT(1) +#define REG07_CK_POL BIT(2) +#define REG07_TEST3 BIT(3) +#define REG07_TEST4 BIT(4) +#define REG07_480_LINEMASK BIT(5) +#define REG07_AMPTST(val) ((val) << 6) + +#define REG08_SLHRC(val) (val) +#define REG08_CLOCK_DIV(val) ((val) << 2) +#define REG08_PANEL(val) ((val) << 5) + +#define REG09_SUB_BRIGHT_R(val) (val) +#define REG09_NW_NB BIT(6) +#define REG09_IPCON BIT(7) + +#define REG0A_SUB_BRIGHT_B(val) (val) +#define REG0A_PAIR BIT(6) +#define REG0A_DE_SEL BIT(7) + +#define REG0B_MBK_POSITION(val) (val) +#define REG0B_HD_FREERUN BIT(4) +#define REG0B_VD_FREERUN BIT(5) +#define REG0B_YUV2BIN(val) ((val) << 6) + +#define REG0C_CONTRAST_R(val) (val) +#define REG0C_DOUBLEREAD BIT(7) + +#define REG0D_CONTRAST_G(val) (val) +#define REG0D_RGB_YUV BIT(7) + +#define REG0E_CONTRAST_B(val) (val) +#define REG0E_PIXELCOLORDRIVE BIT(7) + +#define REG0F_ASPECT BIT(0) +#define REG0F_OVERSCAN(val) ((val) << 1) +#define REG0F_FRAMEWIDTH(val) ((val) << 3) + +#define REG10_BRIGHT(val) (val) + +#define REG11_SIG_GAIN(val) (val) +#define REG11_SIGC_CNTL BIT(6) +#define REG11_SIGC_POL BIT(7) + +#define REG12_COLOR(val) (val) +#define REG12_PWCKSEL(val) ((val) << 6) + +#define REG13_4096LEVEL_CNTL(val) (val) +#define REG13_SL4096(val) ((val) << 4) +#define REG13_LIMITER_CONTROL BIT(7) + +#define REG14_PANEL_TEST(val) (val) + +#define REG15_NVM_LINK0 BIT(0) +#define REG15_NVM_LINK1 BIT(1) +#define REG15_NVM_LINK2 BIT(2) +#define REG15_NVM_LINK3 BIT(3) +#define REG15_NVM_LINK4 BIT(4) +#define REG15_NVM_LINK5 BIT(5) +#define REG15_NVM_LINK6 BIT(6) +#define REG15_NVM_LINK7 BIT(7) + +struct y030xx067a_info { + const struct drm_display_mode *display_modes; + unsigned int num_modes; + u16 width_mm, height_mm; + u32 bus_format, bus_flags; +}; + +struct y030xx067a { + struct drm_panel panel; + struct spi_device *spi; + struct regmap *map; + + const struct y030xx067a_info *panel_info; + + struct regulator *supply; + struct gpio_desc *reset_gpio; +}; + +static inline struct y030xx067a *to_y030xx067a(struct drm_panel *panel) +{ + return container_of(panel, struct y030xx067a, panel); +} + +static const struct reg_sequence y030xx067a_init_sequence[] = { + { 0x00, REG00_VBRT_CTRL(0x7f) }, + { 0x01, REG01_COM_DC(0x3c) }, + { 0x02, REG02_VESA_SEL(0x3) | REG02_DA_CONTRAST(0x1f) }, + { 0x03, REG03_VPOSITION(0x0a) }, + { 0x04, REG04_HPOSITION1(0xd2) }, + { 0x05, REG05_CLIP | REG05_NVM_VREFRESH | REG05_SLBRCHARGE(0x2) }, + { 0x06, REG06_NT }, + { 0x07, 0 }, + { 0x08, REG08_PANEL(0x1) | REG08_CLOCK_DIV(0x2) }, + { 0x09, REG09_SUB_BRIGHT_R(0x20) }, + { 0x0a, REG0A_SUB_BRIGHT_B(0x20) }, + { 0x0b, REG0B_HD_FREERUN | REG0B_VD_FREERUN }, + { 0x0c, REG0C_CONTRAST_R(0x00) }, + { 0x0d, REG0D_CONTRAST_G(0x00) }, + { 0x0e, REG0E_CONTRAST_B(0x10) }, + { 0x0f, 0 }, + { 0x10, REG10_BRIGHT(0x7f) }, + { 0x11, REG11_SIGC_CNTL | REG11_SIG_GAIN(0x3f) }, + { 0x12, REG12_COLOR(0x20) | REG12_PWCKSEL(0x1) }, + { 0x13, REG13_4096LEVEL_CNTL(0x8) }, + { 0x14, 0 }, + { 0x15, 0 }, +}; + +static int y030xx067a_prepare(struct drm_panel *panel) +{ + struct y030xx067a *priv = to_y030xx067a(panel); + struct device *dev = &priv->spi->dev; + int err; + + err = regulator_enable(priv->supply); + if (err) { + dev_err(dev, "Failed to enable power supply: %d\n", err); + return err; + } + + /* Reset the chip */ + gpiod_set_value_cansleep(priv->reset_gpio, 1); + usleep_range(1000, 20000); + gpiod_set_value_cansleep(priv->reset_gpio, 0); + usleep_range(1000, 20000); + + err = regmap_multi_reg_write(priv->map, y030xx067a_init_sequence, + ARRAY_SIZE(y030xx067a_init_sequence)); + if (err) { + dev_err(dev, "Failed to init registers: %d\n", err); + goto err_disable_regulator; + } + + return 0; + +err_disable_regulator: + regulator_disable(priv->supply); + return err; +} + +static int y030xx067a_unprepare(struct drm_panel *panel) +{ + struct y030xx067a *priv = to_y030xx067a(panel); + + gpiod_set_value_cansleep(priv->reset_gpio, 1); + regulator_disable(priv->supply); + + return 0; +} + +static int y030xx067a_enable(struct drm_panel *panel) +{ + struct y030xx067a *priv = to_y030xx067a(panel); + + regmap_set_bits(priv->map, 0x06, REG06_XPSAVE); + + if (panel->backlight) { + /* Wait for the picture to be ready before enabling backlight */ + msleep(120); + } + + return 0; +} + +static int y030xx067a_disable(struct drm_panel *panel) +{ + struct y030xx067a *priv = to_y030xx067a(panel); + + regmap_clear_bits(priv->map, 0x06, REG06_XPSAVE); + + return 0; +} + +static int y030xx067a_get_modes(struct drm_panel *panel, + struct drm_connector *connector) +{ + struct y030xx067a *priv = to_y030xx067a(panel); + const struct y030xx067a_info *panel_info = priv->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 y030xx067a_funcs = { + .prepare = y030xx067a_prepare, + .unprepare = y030xx067a_unprepare, + .enable = y030xx067a_enable, + .disable = y030xx067a_disable, + .get_modes = y030xx067a_get_modes, +}; + +static const struct regmap_config y030xx067a_regmap_config = { + .reg_bits = 8, + .val_bits = 8, + .max_register = 0x15, + .cache_type = REGCACHE_FLAT, +}; + +static int y030xx067a_probe(struct spi_device *spi) +{ + struct device *dev = &spi->dev; + struct y030xx067a *priv; + int err; + + priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); + if (!priv) + return -ENOMEM; + + priv->spi = spi; + spi_set_drvdata(spi, priv); + + priv->map = devm_regmap_init_spi(spi, &y030xx067a_regmap_config); + if (IS_ERR(priv->map)) { + dev_err(dev, "Unable to init regmap\n"); + return PTR_ERR(priv->map); + } + + priv->panel_info = of_device_get_match_data(dev); + if (!priv->panel_info) + return -EINVAL; + + priv->supply = devm_regulator_get(dev, "power"); + if (IS_ERR(priv->supply)) + return dev_err_probe(dev, PTR_ERR(priv->supply), + "Failed to get power supply\n"); + + priv->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH); + if (IS_ERR(priv->reset_gpio)) + return dev_err_probe(dev, PTR_ERR(priv->reset_gpio), + "Failed to get reset GPIO\n"); + + drm_panel_init(&priv->panel, dev, &y030xx067a_funcs, + DRM_MODE_CONNECTOR_DPI); + + err = drm_panel_of_backlight(&priv->panel); + if (err) + return err; + + drm_panel_add(&priv->panel); + + return 0; +} + +static void y030xx067a_remove(struct spi_device *spi) +{ + struct y030xx067a *priv = spi_get_drvdata(spi); + + drm_panel_remove(&priv->panel); + drm_panel_disable(&priv->panel); + drm_panel_unprepare(&priv->panel); +} + +static const struct drm_display_mode y030xx067a_modes[] = { + { /* 60 Hz */ + .clock = 14400, + .hdisplay = 320, + .hsync_start = 320 + 10, + .hsync_end = 320 + 10 + 37, + .htotal = 320 + 10 + 37 + 33, + .vdisplay = 480, + .vsync_start = 480 + 84, + .vsync_end = 480 + 84 + 20, + .vtotal = 480 + 84 + 20 + 16, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, + { /* 50 Hz */ + .clock = 12000, + .hdisplay = 320, + .hsync_start = 320 + 10, + .hsync_end = 320 + 10 + 37, + .htotal = 320 + 10 + 37 + 33, + .vdisplay = 480, + .vsync_start = 480 + 84, + .vsync_end = 480 + 84 + 20, + .vtotal = 480 + 84 + 20 + 16, + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC, + }, +}; + +static const struct y030xx067a_info y030xx067a_info = { + .display_modes = y030xx067a_modes, + .num_modes = ARRAY_SIZE(y030xx067a_modes), + .width_mm = 69, + .height_mm = 51, + .bus_format = MEDIA_BUS_FMT_RGB888_3X8_DELTA, + .bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE | DRM_BUS_FLAG_DE_LOW, +}; + +static const struct of_device_id y030xx067a_of_match[] = { + { .compatible = "abt,y030xx067a", .data = &y030xx067a_info }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, y030xx067a_of_match); + +static struct spi_driver y030xx067a_driver = { + .driver = { + .name = "abt-y030xx067a", + .of_match_table = y030xx067a_of_match, + }, + .probe = y030xx067a_probe, + .remove = y030xx067a_remove, +}; +module_spi_driver(y030xx067a_driver); + +MODULE_AUTHOR("Paul Cercueil <paul@crapouillou.net>"); +MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>"); +MODULE_LICENSE("GPL v2"); |