Add panel driver for it.

Signed-off-by: Jerry Han hanxu5@huaqin.corp-partner.google.com --- MAINTAINERS | 6 + drivers/gpu/drm/panel/Kconfig | 11 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-boe-himax8279d.c | 593 +++++++++++++++++++++++++++ 4 files changed, 611 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-boe-himax8279d.c

diff --git a/MAINTAINERS b/MAINTAINERS index b2f710e..38e2881 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4636,6 +4636,12 @@ S: Maintained F: drivers/gpu/drm/tinydrm/ili9225.c F: Documentation/devicetree/bindings/display/ilitek,ili9225.txt

+DRM DRIVER FOR BOE HIMAX8279D PANELS +M: Jerry Han hanxu5@huaqin.corp-partner.google.com +S: Maintained +F: drivers/gpu/drm/panel/panel-boe-himax8279d.c +F: Documentation/devicetree/bindings/display/panel/boe,himax8279d.txt + DRM DRIVER FOR INTEL I810 VIDEO CARDS S: Orphan / Obsolete F: drivers/gpu/drm/i810/ diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 6020c30..e5dcfd1 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -186,4 +186,15 @@ config DRM_PANEL_SITRONIX_ST7789V Say Y here if you want to enable support for the Sitronix ST7789V controller for 240x320 LCD panels

+config DRM_PANEL_BOE_HIMAX8279D + tristate "Boe Himax8279d panel" + depends on OF + depends on DRM_MIPI_DSI + depends on BACKLIGHT_CLASS_DEVICE + help + Say Y here if you want to enable support for Same type + TFT-LCD modules. The panel has a 1200x1920 resolution and uses + 24 bit RGB per pixel. It provides a MIPI DSI interface to + the host and has a built-in LED backlight. + endmenu diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 5ccaaa9..8a36543 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -19,3 +19,4 @@ obj-$(CONFIG_DRM_PANEL_SEIKO_43WVF1G) += panel-seiko-43wvf1g.o obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o obj-$(CONFIG_DRM_PANEL_SHARP_LS043T1LE01) += panel-sharp-ls043t1le01.o obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o +obj-$(CONFIG_DRM_PANEL_BOE_HIMAX8279D) += panel-boe-himax8279d.o diff --git a/drivers/gpu/drm/panel/panel-boe-himax8279d.c b/drivers/gpu/drm/panel/panel-boe-himax8279d.c new file mode 100644 index 0000000..2788bdd --- /dev/null +++ b/drivers/gpu/drm/panel/panel-boe-himax8279d.c @@ -0,0 +1,593 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (c) 2019, Huaqin Electronics Co., Ltd + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + */ + +#include <linux/backlight.h> +#include <linux/gpio/consumer.h> +#include <linux/module.h> +#include <linux/of.h> +#include <linux/of_device.h> +#include <linux/regulator/consumer.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_panel.h> + +#include <video/mipi_display.h> +#include <linux/err.h> + +struct dsi_cmd_desc { + char wait; + char cmd; + char len; + char *payload; +}; + +struct dsi_panel_cmds { + char *buf; + int blen; + struct dsi_cmd_desc *cmds; + int cmd_cnt; +}; + +struct panel_info { + struct drm_panel base; + struct mipi_dsi_device *link; + + struct backlight_device *backlight; + struct gpio_desc *reset_gpio; + struct gpio_desc *pp33000_gpio; + struct gpio_desc *pp18000_gpio; + + u32 rst_seq[10]; + u32 rst_seq_len; + + struct dsi_panel_cmds *on_cmds; + struct dsi_panel_cmds *off_cmds; + struct drm_display_mode *panel_display_mode; + + unsigned int panel_width_mm; + unsigned int panel_height_mm; + unsigned int per_color_channel; + + bool prepared; + bool enabled; +}; + +static int dsi_parse_reset_seq(struct device_node *np, u32 rst_seq[10], + u32 *rst_len, const char *name) +{ + int num = 0, i; + int rc; + struct property *data; + u32 tmp[10]; + *rst_len = 0; + data = of_find_property(np, name, &num); + + num /= sizeof(u32); + if (!data || !num || num > 10 || num % 2) { + pr_err("%s:%d, error reading %s, length found = %d\n", + __func__, __LINE__, name, num); + return -EINVAL; + } + + rc = of_property_read_u32_array(np, name, tmp, num); + if (rc) { + pr_err("%s:%d, error reading %s, rc = %d\n", + __func__, __LINE__, name, rc); + return -EINVAL; + } + + for (i = 0; i < num; ++i) { + rst_seq[i] = tmp[i]; + *rst_len = num; + } + return 0; +} + +ssize_t mipi_dsi_dcs_write_delay(struct mipi_dsi_device *dsi, u8 cmd, + const void *data, size_t len, size_t time) +{ + ssize_t ret; + + if (len == 0) + ret = mipi_dsi_dcs_write(dsi, cmd, NULL, 0); + else + ret = mipi_dsi_dcs_write(dsi, cmd, data, len); + + msleep(time); + + return ret; +} + +static int write_cmds(struct mipi_dsi_device *dsi_device, + struct dsi_panel_cmds *init_cmds) +{ + struct dsi_cmd_desc *one_cmd = init_cmds->cmds; + int i = 0; + int ret; + + for (i = 0; i < init_cmds->cmd_cnt; i++) { + if (one_cmd == NULL) + return -EINVAL; + + ret = mipi_dsi_dcs_write_delay(dsi_device, + one_cmd->cmd, one_cmd->payload, + one_cmd->len, one_cmd->wait); + one_cmd++; + } + + return ret; +} + +static int parse_dcs_cmds(struct device_node *np, + struct dsi_panel_cmds *pcmds, char *cmd_key) +{ + const char *data; + int blen = 0, len, cnt = 0; + char *buf, *bp; + struct dsi_cmd_desc *temp_cmd; + + data = of_get_property(np, cmd_key, &blen); + if (!data) { + pr_err("%s: failed, key=%s\n", __func__, cmd_key); + return -ENOMEM; + } + + buf = kzalloc(sizeof(char) * blen, GFP_KERNEL); + if (!buf) + return -ENOMEM; + + memcpy(buf, data, blen); + + /* scan dcs commands */ + bp = buf; + len = blen; + + /* get how much cmd cnt */ + while (len > 0) { + cnt++; + len = len - *(bp); + bp = bp + *(bp); + } + + pcmds->cmd_cnt = cnt; + + pcmds->cmds = kcalloc(cnt, sizeof(struct dsi_cmd_desc), GFP_KERNEL); + if (!pcmds->cmds) + return -ENOMEM; + temp_cmd = pcmds->cmds; + + bp = buf; + len = blen; + + while (cnt != 0) { + temp_cmd->wait = *(bp+1); + temp_cmd->cmd = *(bp+2); + temp_cmd->len = *(bp) - 3; + temp_cmd->payload = bp + 3; + + cnt--; + temp_cmd++; + bp = bp + *(bp); + } + + pcmds->buf = buf; + pcmds->blen = blen; + + return 0; +} + +static int panel_parse_dt(struct panel_info *pinfo) +{ + struct device_node *panels_node; + struct device_node *parameter_node; + static const char *lcd_name; + static const char *panel_parameter; + struct drm_display_mode *display_mode; + struct mipi_dsi_device *dsi_device = pinfo->link; + int ret = 0; + u32 tmp; + + panels_node = of_find_node_by_name(NULL, "panels"); + if (!panels_node) { + pr_err("Get panels node Fail!\n"); + return -EINVAL; + } + + panel_parameter = of_get_property(panels_node, "panel-parameter", NULL); + if (!panel_parameter) { + pr_err("Get panel parameter Fail!\n"); + return -EINVAL; + } + + parameter_node = of_find_node_by_name(panels_node, panel_parameter); + if (!parameter_node) + return -ENODEV; + + /* get lcd name */ + lcd_name = of_get_property(parameter_node, "dsi-panel-name", NULL); + if (!lcd_name) { + pr_err("Get lcd_name Fail!\n"); + return -EINVAL; + } + pr_info("%s: Lcd Name = %s\n", __func__, lcd_name); + + /* get lcd init code */ + pinfo->on_cmds = kzalloc(sizeof(struct dsi_panel_cmds), GFP_KERNEL); + if (!(pinfo->on_cmds)) + return -ENOMEM; + + ret = parse_dcs_cmds(parameter_node, pinfo->on_cmds, "dsi-on-command"); + if (ret < 0) { + pr_err("Get Dsi on command Fail\n"); + return -EINVAL; + } + + /* get lcd off code */ + pinfo->off_cmds = kzalloc(sizeof(struct dsi_panel_cmds), GFP_KERNEL); + if (!(pinfo->off_cmds)) + return -ENOMEM; + + ret = parse_dcs_cmds(parameter_node, pinfo->off_cmds, + "dsi-off-command"); + if (ret < 0) { + pr_err("Get Dsi off command Fail\n"); + return -EINVAL; + } + + /* get Porch */ + display_mode = kzalloc(sizeof(struct drm_display_mode), GFP_KERNEL); + if (!display_mode) + return -ENOMEM; + pinfo->panel_display_mode = display_mode; + + ret = of_property_read_u32(parameter_node, "dsi-pixel-clk", &tmp); + display_mode->clock = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, + "dsi-panel-hzorizontal", &tmp); + display_mode->hdisplay = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, "dsi-h-front-porch", &tmp); + tmp = (!ret ? tmp : 0); + display_mode->hsync_start = display_mode->hdisplay + tmp; + + ret = of_property_read_u32(parameter_node, "dsi-h-back-porch", &tmp); + tmp = (!ret ? tmp : 0); + display_mode->hsync_end = display_mode->hsync_start + tmp; + + ret = of_property_read_u32(parameter_node, "dsi-h-pulse-width", &tmp); + tmp = (!ret ? tmp : 0); + display_mode->htotal = display_mode->hsync_end + tmp; + + ret = of_property_read_u32(parameter_node, "dsi-panel-vertical", &tmp); + display_mode->vdisplay = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, "dsi-v-front-porch", &tmp); + tmp = (!ret ? tmp : 0); + display_mode->vsync_start = display_mode->vdisplay + tmp; + + ret = of_property_read_u32(parameter_node, "dsi-v-back-porch", &tmp); + tmp = (!ret ? tmp : 0); + display_mode->vsync_end = display_mode->vsync_start + tmp; + + ret = of_property_read_u32(parameter_node, "dsi-v-pulse-width", &tmp); + tmp = (!ret ? tmp : 0); + display_mode->vtotal = display_mode->vsync_end + tmp; + + ret = of_property_read_u32(parameter_node, "dsi-panel-refresh", &tmp); + display_mode->vrefresh = (!ret ? tmp : 0); + + /* get lans */ + ret = of_property_read_u32(parameter_node, "dsi-panel-lanes", &tmp); + dsi_device->lanes = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, "dsi-panel-format", &tmp); + dsi_device->format = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, + "dsi-panel-mode-flags", &tmp); + dsi_device->mode_flags = (!ret ? tmp : 0); + + /* get WxH */ + ret = of_property_read_u32(parameter_node, "dsi-panel-width-mm", &tmp); + pinfo->panel_width_mm = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, "dsi-panel-height-mm", &tmp); + pinfo->panel_height_mm = (!ret ? tmp : 0); + + ret = of_property_read_u32(parameter_node, "per-color-channel", &tmp); + pinfo->per_color_channel = (!ret ? tmp : 0); + + /* reset time */ + ret = dsi_parse_reset_seq(parameter_node, pinfo->rst_seq, + &(pinfo->rst_seq_len), "dsi-reset-sequence"); + if (ret < 0) + return ret; + + return 0; +} + +static inline struct panel_info *to_panel_info(struct drm_panel *panel) +{ + return container_of(panel, struct panel_info, base); +} + +static int panel_disable(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + + if (!pinfo->enabled) + return 0; + + backlight_disable(pinfo->backlight); + + pinfo->enabled = false; + + return 0; +} + +static int panel_unprepare(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + int err; + + if (!pinfo->prepared) + return 0; + + err = write_cmds(pinfo->link, pinfo->off_cmds); + if (err < 0) { + dev_err(panel->dev, + "failed to send DCS Off Code: %d\n", err); + return err; + } + + usleep_range(1000, 1000); + gpiod_set_value_cansleep(pinfo->reset_gpio, 0); + gpiod_set_value_cansleep(pinfo->pp33000_gpio, 0); + gpiod_set_value_cansleep(pinfo->pp18000_gpio, 0); + + pinfo->prepared = false; + + return 0; +} + +static int panel_prepare(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + int err, i; + + if (pinfo->prepared) + return 0; + + gpiod_set_value_cansleep(pinfo->pp18000_gpio, 1); + gpiod_set_value_cansleep(pinfo->pp33000_gpio, 1); + + /* reset sequence */ + for (i = 0; i < pinfo->rst_seq_len; ++i) { + gpiod_set_value_cansleep(pinfo->reset_gpio, pinfo->rst_seq[i]); + if (pinfo->rst_seq[++i]) + usleep_range(pinfo->rst_seq[i] * 1000, + pinfo->rst_seq[i] * 1000); + } + + /* send init code */ + err = write_cmds(pinfo->link, pinfo->on_cmds); + if (err < 0) { + dev_err(panel->dev, + "failed to send DCS Init Code: %d\n", err); + goto poweroff; + } + + pinfo->prepared = true; + + return 0; + +poweroff: + gpiod_set_value_cansleep(pinfo->reset_gpio, 0); + gpiod_set_value_cansleep(pinfo->pp33000_gpio, 0); + gpiod_set_value_cansleep(pinfo->pp18000_gpio, 0); + return err; +} + +static int panel_enable(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + int ret; + + if (pinfo->enabled) + return 0; + + ret = backlight_enable(pinfo->backlight); + if (ret) { + DRM_DEV_ERROR(panel->drm->dev, + "Failed to enable backlight %d\n", ret); + return ret; + } + + pinfo->enabled = true; + + return 0; +} + +static int panel_get_modes(struct drm_panel *panel) +{ + struct panel_info *pinfo = to_panel_info(panel); + struct drm_display_mode *mode; + + if (!pinfo->panel_display_mode) { + pr_err("Get panel_display_mode fail!\n"); + return -1; + } + + mode = drm_mode_duplicate(panel->drm, pinfo->panel_display_mode); + if (!mode) { + pr_err("failed to add mode\n"); + return -ENOMEM; + } + + drm_mode_set_name(mode); + + drm_mode_probed_add(panel->connector, mode); + + panel->connector->display_info.width_mm = pinfo->panel_width_mm; + panel->connector->display_info.height_mm = pinfo->panel_height_mm; + panel->connector->display_info.bpc = pinfo->per_color_channel; + + return 1; +} + +static const struct drm_panel_funcs panel_funcs = { + .disable = panel_disable, + .unprepare = panel_unprepare, + .prepare = panel_prepare, + .enable = panel_enable, + .get_modes = panel_get_modes, +}; + +static const struct of_device_id panel_of_match[] = { + { .compatible = "boe,himax8279d", }, + { } +}; +MODULE_DEVICE_TABLE(of, panel_of_match); + +static int panel_add(struct panel_info *pinfo) +{ + struct device *dev = &pinfo->link->dev; + struct device_node *np; + int err; + + pinfo->pp33000_gpio = devm_gpiod_get_optional(dev, + "pp33000", + GPIOD_OUT_HIGH); + if (IS_ERR(pinfo->pp33000_gpio)) { + err = PTR_ERR(pinfo->pp33000_gpio); + dev_err(dev, "failed to get pp33000 gpio: %d\n", err); + pinfo->pp33000_gpio = NULL; + } + + pinfo->pp18000_gpio = devm_gpiod_get_optional(dev, + "pp18000", + GPIOD_OUT_HIGH); + if (IS_ERR(pinfo->pp18000_gpio)) { + err = PTR_ERR(pinfo->pp18000_gpio); + dev_err(dev, "failed to get pp18000 gpio: %d\n", err); + pinfo->pp18000_gpio = NULL; + } + + pinfo->reset_gpio = devm_gpiod_get_optional(dev, "enable", + GPIOD_OUT_HIGH); + if (IS_ERR(pinfo->reset_gpio)) { + err = PTR_ERR(pinfo->reset_gpio); + dev_err(dev, "failed to get enable gpio: %d\n", err); + pinfo->reset_gpio = NULL; + } + + np = of_parse_phandle(dev->of_node, "backlight", 0); + if (np) { + pinfo->backlight = of_find_backlight_by_node(np); + of_node_put(np); + + if (!pinfo->backlight) + return -EPROBE_DEFER; + } + + drm_panel_init(&pinfo->base); + pinfo->base.funcs = &panel_funcs; + pinfo->base.dev = &pinfo->link->dev; + + err = drm_panel_add(&pinfo->base); + if (err < 0) + goto put_backlight; + + return 0; + +put_backlight: + put_device(&pinfo->backlight->dev); + + return err; +} + +static void panel_del(struct panel_info *pinfo) +{ + if (pinfo->base.dev) + drm_panel_remove(&pinfo->base); + + put_device(&pinfo->backlight->dev); +} + +static int panel_probe(struct mipi_dsi_device *dsi) +{ + struct panel_info *pinfo; + int err; + + pinfo = devm_kzalloc(&dsi->dev, sizeof(*pinfo), GFP_KERNEL); + if (!pinfo) + return -ENOMEM; + + pinfo->link = dsi; + panel_parse_dt(pinfo); + mipi_dsi_set_drvdata(dsi, pinfo); + + err = panel_add(pinfo); + if (err < 0) + return err; + + return mipi_dsi_attach(dsi); +} + +static int panel_remove(struct mipi_dsi_device *dsi) +{ + struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi); + int err; + + err = panel_unprepare(&pinfo->base); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to unprepare panel: %d\n", + err); + + err = panel_disable(&pinfo->base); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to disable panel: %d\n", err); + + err = mipi_dsi_detach(dsi); + if (err < 0) + DRM_DEV_ERROR(&dsi->dev, "failed to detach from DSI host: %d\n", + err); + + drm_panel_detach(&pinfo->base); + panel_del(pinfo); + + return 0; +} + +static void panel_shutdown(struct mipi_dsi_device *dsi) +{ + struct panel_info *pinfo = mipi_dsi_get_drvdata(dsi); + + panel_unprepare(&pinfo->base); + panel_disable(&pinfo->base); +} + +static struct mipi_dsi_driver panel_driver = { + .driver = { + .name = "panel-innolux-ota7290b", + .of_match_table = panel_of_match, + }, + .probe = panel_probe, + .remove = panel_remove, + .shutdown = panel_shutdown, +}; +module_mipi_dsi_driver(panel_driver); + +MODULE_AUTHOR("Jerry Han hanxu5@huaqin.corp-partner.google.com"); +MODULE_DESCRIPTION("Boe Himax8279d driver"); +MODULE_LICENSE("GPL v2");