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https://github.com/AsahiLinux/u-boot
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303 lines
6.6 KiB
C
303 lines
6.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0+
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/*
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* Renesas R61307 panel driver
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*
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* Copyright (c) 2022 Svyatoslav Ryhel <clamor95@gmail.com>
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*/
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#include <common.h>
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#include <backlight.h>
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#include <dm.h>
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#include <panel.h>
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#include <log.h>
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#include <misc.h>
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#include <mipi_display.h>
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#include <mipi_dsi.h>
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#include <asm/gpio.h>
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#include <linux/delay.h>
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#include <linux/err.h>
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#include <power/regulator.h>
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/*
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* The datasheet is not publicly available, all values are
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* taken from the downstream. If you have access to datasheets,
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* corrections are welcome.
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*/
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#define R61307_MACP 0xB0 /* Manufacturer CMD Protect */
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#define R61307_INVERSION 0xC1
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#define R61307_GAMMA_SET_A 0xC8 /* Gamma Setting A */
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#define R61307_GAMMA_SET_B 0xC9 /* Gamma Setting B */
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#define R61307_GAMMA_SET_C 0xCA /* Gamma Setting C */
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#define R61307_CONTRAST_SET 0xCC
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struct renesas_r61307_priv {
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struct udevice *vcc;
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struct udevice *iovcc;
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struct udevice *backlight;
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struct gpio_desc reset_gpio;
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bool dig_cont_adj;
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bool inversion;
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u32 gamma;
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};
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static const u8 macp_on[] = {
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R61307_MACP, 0x03
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};
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static const u8 macp_off[] = {
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R61307_MACP, 0x04
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};
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static const u8 address_mode[] = {
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MIPI_DCS_SET_ADDRESS_MODE
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};
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static const u8 contrast_setting[] = {
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R61307_CONTRAST_SET,
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0xdc, 0xb4, 0xff
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};
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static const u8 column_inversion[] = {
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R61307_INVERSION,
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0x00, 0x50, 0x03, 0x22,
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0x16, 0x06, 0x60, 0x11
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};
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static const u8 line_inversion[] = {
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R61307_INVERSION,
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0x00, 0x10, 0x03, 0x22,
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0x16, 0x06, 0x60, 0x01
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};
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static const u8 gamma_setting[][25] = {
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{},
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{
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R61307_GAMMA_SET_A,
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0x00, 0x06, 0x0a, 0x0f,
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0x14, 0x1f, 0x1f, 0x17,
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0x12, 0x0c, 0x09, 0x06,
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0x00, 0x06, 0x0a, 0x0f,
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0x14, 0x1f, 0x1f, 0x17,
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0x12, 0x0c, 0x09, 0x06
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},
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{
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R61307_GAMMA_SET_A,
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0x00, 0x05, 0x0b, 0x0f,
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0x11, 0x1d, 0x20, 0x18,
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0x18, 0x09, 0x07, 0x06,
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0x00, 0x05, 0x0b, 0x0f,
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0x11, 0x1d, 0x20, 0x18,
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0x18, 0x09, 0x07, 0x06
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},
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{
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R61307_GAMMA_SET_A,
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0x0b, 0x0d, 0x10, 0x14,
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0x13, 0x1d, 0x20, 0x18,
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0x12, 0x09, 0x07, 0x06,
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0x0a, 0x0c, 0x10, 0x14,
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0x13, 0x1d, 0x20, 0x18,
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0x12, 0x09, 0x07, 0x06
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},
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};
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static struct display_timing default_timing = {
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.pixelclock.typ = 62000000,
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.hactive.typ = 768,
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.hfront_porch.typ = 116,
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.hback_porch.typ = 81,
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.hsync_len.typ = 5,
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.vactive.typ = 1024,
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.vfront_porch.typ = 24,
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.vback_porch.typ = 8,
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.vsync_len.typ = 2,
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};
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static int renesas_r61307_enable_backlight(struct udevice *dev)
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{
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struct renesas_r61307_priv *priv = dev_get_priv(dev);
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int ret;
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ret = regulator_set_enable_if_allowed(priv->vcc, 1);
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if (ret) {
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log_err("enabling vcc-supply failed (%d)\n", ret);
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return ret;
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}
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mdelay(5);
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ret = regulator_set_enable_if_allowed(priv->iovcc, 1);
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if (ret) {
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log_err("enabling iovcc-supply failed (%d)\n", ret);
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return ret;
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}
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ret = dm_gpio_set_value(&priv->reset_gpio, 0);
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if (ret) {
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log_err("changing reset-gpio failed (%d)\n", ret);
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return ret;
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}
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mdelay(5);
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ret = dm_gpio_set_value(&priv->reset_gpio, 1);
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if (ret) {
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log_err("changing reset-gpio failed (%d)\n", ret);
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return ret;
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}
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mdelay(5);
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return 0;
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}
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static int renesas_r61307_set_backlight(struct udevice *dev, int percent)
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{
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struct renesas_r61307_priv *priv = dev_get_priv(dev);
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struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
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struct mipi_dsi_device *dsi = plat->device;
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int ret;
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ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
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if (ret < 0) {
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log_err("failed to exit sleep mode: %d\n", ret);
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return ret;
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}
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mdelay(80);
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mipi_dsi_dcs_write_buffer(dsi, address_mode,
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sizeof(address_mode));
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mdelay(20);
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ret = mipi_dsi_dcs_set_pixel_format(dsi, MIPI_DCS_PIXEL_FMT_24BIT << 4);
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if (ret < 0) {
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log_err("failed to set pixel format: %d\n", ret);
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return ret;
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}
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/* MACP Off */
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mipi_dsi_generic_write(dsi, macp_off, sizeof(macp_off));
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if (priv->dig_cont_adj)
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mipi_dsi_generic_write(dsi, contrast_setting,
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sizeof(contrast_setting));
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if (priv->gamma)
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mipi_dsi_generic_write(dsi, gamma_setting[priv->gamma],
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sizeof(gamma_setting[priv->gamma]));
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if (priv->inversion)
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mipi_dsi_generic_write(dsi, column_inversion,
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sizeof(column_inversion));
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else
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mipi_dsi_generic_write(dsi, line_inversion,
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sizeof(line_inversion));
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/* MACP On */
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mipi_dsi_generic_write(dsi, macp_on, sizeof(macp_on));
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ret = mipi_dsi_dcs_set_display_on(dsi);
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if (ret < 0) {
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log_err("failed to set display on: %d\n", ret);
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return ret;
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}
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mdelay(50);
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ret = backlight_enable(priv->backlight);
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if (ret)
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return ret;
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ret = backlight_set_brightness(priv->backlight, percent);
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if (ret)
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return ret;
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return 0;
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}
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static int renesas_r61307_timings(struct udevice *dev,
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struct display_timing *timing)
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{
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memcpy(timing, &default_timing, sizeof(*timing));
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return 0;
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}
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static int renesas_r61307_of_to_plat(struct udevice *dev)
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{
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struct renesas_r61307_priv *priv = dev_get_priv(dev);
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int ret;
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ret = uclass_get_device_by_phandle(UCLASS_PANEL_BACKLIGHT, dev,
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"backlight", &priv->backlight);
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if (ret) {
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log_err("Cannot get backlight: ret = %d\n", ret);
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return ret;
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}
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ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
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"vcc-supply", &priv->vcc);
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if (ret) {
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log_err("Cannot get vcc-supply: ret = %d\n", ret);
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return ret;
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}
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ret = uclass_get_device_by_phandle(UCLASS_REGULATOR, dev,
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"iovcc-supply", &priv->iovcc);
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if (ret) {
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log_err("Cannot get iovcc-supply: ret = %d\n", ret);
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return ret;
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}
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ret = gpio_request_by_name(dev, "reset-gpios", 0,
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&priv->reset_gpio, GPIOD_IS_OUT);
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if (ret) {
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log_err("Could not decode reser-gpios (%d)\n", ret);
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return ret;
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}
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priv->dig_cont_adj = dev_read_bool(dev, "renesas,contrast");
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priv->inversion = dev_read_bool(dev, "renesas,inversion");
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priv->gamma = dev_read_u32_default(dev, "renesas,gamma", 0);
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return 0;
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}
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static int renesas_r61307_probe(struct udevice *dev)
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{
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struct mipi_dsi_panel_plat *plat = dev_get_plat(dev);
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/* fill characteristics of DSI data link */
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plat->lanes = 4;
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plat->format = MIPI_DSI_FMT_RGB888;
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plat->mode_flags = MIPI_DSI_MODE_VIDEO;
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return 0;
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}
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static const struct panel_ops renesas_r61307_ops = {
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.enable_backlight = renesas_r61307_enable_backlight,
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.set_backlight = renesas_r61307_set_backlight,
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.get_display_timing = renesas_r61307_timings,
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};
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static const struct udevice_id renesas_r61307_ids[] = {
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{ .compatible = "koe,tx13d100vm0eaa" },
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{ .compatible = "hitachi,tx13d100vm0eaa" },
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{ }
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};
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U_BOOT_DRIVER(renesas_r61307) = {
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.name = "renesas_r61307",
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.id = UCLASS_PANEL,
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.of_match = renesas_r61307_ids,
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.ops = &renesas_r61307_ops,
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.of_to_plat = renesas_r61307_of_to_plat,
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.probe = renesas_r61307_probe,
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.plat_auto = sizeof(struct mipi_dsi_panel_plat),
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.priv_auto = sizeof(struct renesas_r61307_priv),
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};
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