diff options
Diffstat (limited to 'drivers/video/simple_panel.c')
| -rw-r--r-- | drivers/video/simple_panel.c | 215 |
1 files changed, 215 insertions, 0 deletions
diff --git a/drivers/video/simple_panel.c b/drivers/video/simple_panel.c new file mode 100644 index 00000000000..b6c5b058b2e --- /dev/null +++ b/drivers/video/simple_panel.c @@ -0,0 +1,215 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Copyright (c) 2016 Google, Inc + * Written by Simon Glass <sjg@chromium.org> + */ + +#include <backlight.h> +#include <dm.h> +#include <edid.h> +#include <i2c.h> +#include <log.h> +#include <mipi_dsi.h> +#include <panel.h> +#include <asm/gpio.h> +#include <power/regulator.h> + +#define EDID_I2C_ADDR 0x50 + +struct simple_panel_priv { + struct udevice *reg; + struct udevice *backlight; + struct gpio_desc enable; +}; + +static int simple_panel_enable_backlight(struct udevice *dev) +{ + struct simple_panel_priv *priv = dev_get_priv(dev); + int ret; + + debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name); + dm_gpio_set_value(&priv->enable, 1); + ret = backlight_enable(priv->backlight); + debug("%s: done, ret = %d\n", __func__, ret); + if (ret) + return ret; + + return 0; +} + +static int simple_panel_set_backlight(struct udevice *dev, int percent) +{ + struct simple_panel_priv *priv = dev_get_priv(dev); + int ret; + + debug("%s: start, backlight = '%s'\n", __func__, priv->backlight->name); + dm_gpio_set_value(&priv->enable, 1); + ret = backlight_set_brightness(priv->backlight, percent); + debug("%s: done, ret = %d\n", __func__, ret); + if (ret) + return ret; + + return 0; +} + +#if CONFIG_IS_ENABLED(I2C_EDID) && CONFIG_IS_ENABLED(DM_I2C) +static int simple_panel_get_edid_timing(struct udevice *dev, + struct display_timing *timings) +{ + struct udevice *panel_ddc, *panel_edid; + struct display_timing edid_timing; + u8 edid_buf[EDID_SIZE] = { 0 }; + int ret, bpc; + /* Check for DDC i2c if no timings are provided */ + ret = uclass_get_device_by_phandle(UCLASS_I2C, dev, + "ddc-i2c-bus", + &panel_ddc); + if (ret) { + log_debug("%s: cannot get DDC i2c bus: error %d\n", + __func__, ret); + return ret; + } + + ret = dm_i2c_probe(panel_ddc, EDID_I2C_ADDR, 0, &panel_edid); + if (ret) { + log_debug("%s: cannot probe EDID: error %d\n", + __func__, ret); + return ret; + } + + ret = dm_i2c_read(panel_edid, 0, edid_buf, sizeof(edid_buf)); + if (ret) { + log_debug("%s: cannot dump EDID buffer: error %d\n", + __func__, ret); + return ret; + } + + ret = edid_get_timing(edid_buf, sizeof(edid_buf), + &edid_timing, &bpc); + if (ret) { + log_debug("%s: cannot decode EDID info: error %d\n", + __func__, ret); + return ret; + } + + memcpy(timings, &edid_timing, sizeof(*timings)); + + return 0; +} +#else +static int simple_panel_get_edid_timing(struct udevice *dev, + struct display_timing *timings) +{ + return -ENOTSUPP; +} +#endif + +static int simple_panel_get_display_timing(struct udevice *dev, + struct display_timing *timings) +{ + const void *blob = gd->fdt_blob; + int ret; + + /* Check for timing subnode if panel node first */ + ret = fdtdec_decode_display_timing(blob, dev_of_offset(dev), + 0, timings); + if (!ret) + return ret; + + return simple_panel_get_edid_timing(dev, timings); +} + +static int simple_panel_of_to_plat(struct udevice *dev) +{ + struct simple_panel_priv *priv = dev_get_priv(dev); + int ret; + + if (CONFIG_IS_ENABLED(DM_REGULATOR)) { + ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev, + "power-supply", &priv->reg); + if (ret) { + debug("%s: Warning: cannot get power supply: ret=%d\n", + __func__, ret); + if (ret != -ENOENT) + return ret; + } + } + + ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev, + "backlight", &priv->backlight); + if (ret) { + debug("%s: Cannot get backlight: ret=%d\n", __func__, ret); + if (ret != -ENOENT) + return log_ret(ret); + } + + ret = gpio_request_by_name(dev, "enable-gpios", 0, &priv->enable, + GPIOD_IS_OUT); + if (ret) { + debug("%s: Warning: cannot get enable GPIO: ret=%d\n", + __func__, ret); + if (ret != -ENOENT) + return log_ret(ret); + } + + return 0; +} + +static int simple_panel_probe(struct udevice *dev) +{ + struct simple_panel_priv *priv = dev_get_priv(dev); + struct mipi_dsi_panel_plat *plat = dev_get_plat(dev); + struct mipi_dsi_panel_plat *dsi_data = + (struct mipi_dsi_panel_plat *)dev_get_driver_data(dev); + int ret; + + ret = regulator_set_enable_if_allowed(priv->reg, true); + if (ret && ret != -ENOSYS) { + debug("%s: failed to enable regulator '%s' %d\n", + __func__, priv->reg->name, ret); + return ret; + } + + if (dsi_data) + memcpy(plat, dsi_data, sizeof(struct mipi_dsi_panel_plat)); + + return 0; +} + +static const struct panel_ops simple_panel_ops = { + .enable_backlight = simple_panel_enable_backlight, + .set_backlight = simple_panel_set_backlight, + .get_display_timing = simple_panel_get_display_timing, +}; + +static const struct mipi_dsi_panel_plat panasonic_vvx10f004b00 = { + .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_SYNC_PULSE | + MIPI_DSI_CLOCK_NON_CONTINUOUS, + .format = MIPI_DSI_FMT_RGB888, + .lanes = 4, +}; + +static const struct udevice_id simple_panel_ids[] = { + { .compatible = "simple-panel" }, + { .compatible = "auo,b133xtn01" }, + { .compatible = "auo,b116xw03" }, + { .compatible = "auo,b133htn01" }, + { .compatible = "boe,nv140fhmn49" }, + { .compatible = "lg,lb070wv8" }, + { .compatible = "sharp,lq123p1jx31" }, + { .compatible = "boe,nv101wxmn51" }, + { .compatible = "panasonic,vvx10f004b00", + .data = (ulong)&panasonic_vvx10f004b00 }, + { } +}; + +U_BOOT_DRIVER(simple_panel) = { + .name = "simple_panel", + .id = UCLASS_PANEL, + .of_match = simple_panel_ids, + .ops = &simple_panel_ops, + .of_to_plat = simple_panel_of_to_plat, + .probe = simple_panel_probe, + .priv_auto = sizeof(struct simple_panel_priv), + .plat_auto = sizeof(struct mipi_dsi_panel_plat), +}; |