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    Subject[PATCH v2 3/3] drm: panel: add TDO tl070wsh30 panel driver
    Date
    This adds support for the TDO TL070WSH30 TFT-LCD panel module.
    The panel has a 1024×600 resolution and uses 24 bit RGB per pixel.
    It provides a MIPI DSI interface to the host, a built-in LED backlight
    and touch controller.

    Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
    ---
    drivers/gpu/drm/panel/Kconfig | 11 +
    drivers/gpu/drm/panel/Makefile | 1 +
    drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c | 256 +++++++++++++++++++
    3 files changed, 268 insertions(+)
    create mode 100644 drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c

    diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
    index 8d97d07c5871..2d488a875b99 100644
    --- a/drivers/gpu/drm/panel/Kconfig
    +++ b/drivers/gpu/drm/panel/Kconfig
    @@ -433,6 +433,17 @@ config DRM_PANEL_SONY_ACX565AKM
    Say Y here if you want to enable support for the Sony ACX565AKM
    800x600 3.5" panel (found on the Nokia N900).

    +config DRM_PANEL_TDO_TL070WSH30
    + tristate "TDO TL070WSH30 DSI 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 TDO TL070WSH30 TFT-LCD
    + panel module. The panel has a 1024×600 resolution and uses
    + 24 bit RGB per pixel. It provides a MIPI DSI interface to
    + the host, a built-in LED backlight and touch controller.
    +
    config DRM_PANEL_TPO_TD028TTEC1
    tristate "Toppoly (TPO) TD028TTEC1 panel driver"
    depends on OF && SPI
    diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
    index 15a4e7752951..35ee06a1b5c2 100644
    --- a/drivers/gpu/drm/panel/Makefile
    +++ b/drivers/gpu/drm/panel/Makefile
    @@ -45,6 +45,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
    obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
    obj-$(CONFIG_DRM_PANEL_SONY_ACX424AKP) += panel-sony-acx424akp.o
    obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
    +obj-$(CONFIG_DRM_PANEL_TDO_TL070WSH30) += panel-tdo-tl070wsh30.o
    obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
    obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
    obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
    diff --git a/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
    new file mode 100644
    index 000000000000..c7a6c2c42c52
    --- /dev/null
    +++ b/drivers/gpu/drm/panel/panel-tdo-tl070wsh30.c
    @@ -0,0 +1,256 @@
    +// SPDX-License-Identifier: GPL-2.0
    +/*
    + * Copyright (C) 2020 BayLibre, SAS
    + * Author: Neil Armstrong <narmstrong@baylibre.com>
    + */
    +
    +#include <linux/delay.h>
    +#include <linux/gpio/consumer.h>
    +#include <linux/module.h>
    +#include <linux/of.h>
    +#include <linux/regulator/consumer.h>
    +
    +#include <video/mipi_display.h>
    +
    +#include <drm/drm_crtc.h>
    +#include <drm/drm_device.h>
    +#include <drm/drm_mipi_dsi.h>
    +#include <drm/drm_modes.h>
    +#include <drm/drm_panel.h>
    +
    +struct tdo_tl070wsh30_panel {
    + struct drm_panel base;
    + struct mipi_dsi_device *link;
    +
    + struct regulator *supply;
    + struct gpio_desc *reset_gpio;
    +
    + bool prepared;
    +};
    +
    +static inline
    +struct tdo_tl070wsh30_panel *to_tdo_tl070wsh30_panel(struct drm_panel *panel)
    +{
    + return container_of(panel, struct tdo_tl070wsh30_panel, base);
    +}
    +
    +static int tdo_tl070wsh30_panel_unprepare(struct drm_panel *panel)
    +{
    + struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
    + int err;
    +
    + if (!tdo_tl070wsh30->prepared)
    + return 0;
    +
    + err = mipi_dsi_dcs_set_display_off(tdo_tl070wsh30->link);
    + if (err < 0)
    + dev_err(panel->dev, "failed to set display off: %d\n", err);
    +
    + usleep_range(10000, 11000);
    +
    + err = mipi_dsi_dcs_enter_sleep_mode(tdo_tl070wsh30->link);
    + if (err < 0) {
    + dev_err(panel->dev, "failed to enter sleep mode: %d\n", err);
    + return err;
    + }
    +
    + usleep_range(10000, 11000);
    +
    + tdo_tl070wsh30->prepared = false;
    +
    + return 0;
    +}
    +
    +static int tdo_tl070wsh30_panel_prepare(struct drm_panel *panel)
    +{
    + struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = to_tdo_tl070wsh30_panel(panel);
    + int err;
    +
    + if (tdo_tl070wsh30->prepared)
    + return 0;
    +
    + err = mipi_dsi_dcs_exit_sleep_mode(tdo_tl070wsh30->link);
    + if (err < 0) {
    + dev_err(panel->dev, "failed to exit sleep mode: %d\n", err);
    + return err;
    + }
    +
    + msleep(200);
    +
    + err = mipi_dsi_dcs_set_display_on(tdo_tl070wsh30->link);
    + if (err < 0) {
    + dev_err(panel->dev, "failed to set display on: %d\n", err);
    + return err;
    + }
    +
    + msleep(20);
    +
    + tdo_tl070wsh30->prepared = true;
    +
    + return 0;
    +}
    +
    +static const struct drm_display_mode default_mode = {
    + .clock = 47250,
    + .hdisplay = 1024,
    + .hsync_start = 1024 + 46,
    + .hsync_end = 1024 + 46 + 80,
    + .htotal = 1024 + 46 + 80 + 100,
    + .vdisplay = 600,
    + .vsync_start = 600 + 5,
    + .vsync_end = 600 + 5 + 5,
    + .vtotal = 600 + 5 + 5 + 20,
    + .flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_PVSYNC,
    +};
    +
    +static int tdo_tl070wsh30_panel_get_modes(struct drm_panel *panel,
    + struct drm_connector *connector)
    +{
    + struct drm_display_mode *mode;
    +
    + mode = drm_mode_duplicate(connector->dev, &default_mode);
    + if (!mode) {
    + dev_err(panel->dev, "failed to add mode %ux%ux\n", default_mode.hdisplay,
    + default_mode.vdisplay);
    + return -ENOMEM;
    + }
    +
    + drm_mode_set_name(mode);
    +
    + drm_mode_probed_add(connector, mode);
    +
    + connector->display_info.width_mm = 154;
    + connector->display_info.height_mm = 85;
    + connector->display_info.bpc = 8;
    +
    + return 1;
    +}
    +
    +static const struct drm_panel_funcs tdo_tl070wsh30_panel_funcs = {
    + .unprepare = tdo_tl070wsh30_panel_unprepare,
    + .prepare = tdo_tl070wsh30_panel_prepare,
    + .get_modes = tdo_tl070wsh30_panel_get_modes,
    +};
    +
    +static const struct of_device_id tdo_tl070wsh30_of_match[] = {
    + { .compatible = "tdo,tl070wsh30", },
    + { }
    +};
    +MODULE_DEVICE_TABLE(of, tdo_tl070wsh30_of_match);
    +
    +static int tdo_tl070wsh30_panel_add(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
    +{
    + struct device *dev = &tdo_tl070wsh30->link->dev;
    + int err;
    +
    + tdo_tl070wsh30->supply = devm_regulator_get(dev, "power");
    + if (IS_ERR(tdo_tl070wsh30->supply))
    + return PTR_ERR(tdo_tl070wsh30->supply);
    +
    + tdo_tl070wsh30->reset_gpio = devm_gpiod_get(dev, "reset",
    + GPIOD_OUT_LOW);
    + if (IS_ERR(tdo_tl070wsh30->reset_gpio)) {
    + err = PTR_ERR(tdo_tl070wsh30->reset_gpio);
    + dev_dbg(dev, "failed to get reset gpio: %d\n", err);
    + return err;
    + }
    +
    + drm_panel_init(&tdo_tl070wsh30->base, &tdo_tl070wsh30->link->dev,
    + &tdo_tl070wsh30_panel_funcs, DRM_MODE_CONNECTOR_DSI);
    +
    + err = drm_panel_of_backlight(&tdo_tl070wsh30->base);
    + if (err)
    + return err;
    +
    + err = regulator_enable(tdo_tl070wsh30->supply);
    + if (err < 0)
    + return err;
    +
    + usleep_range(10000, 11000);
    +
    + gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 1);
    +
    + usleep_range(10000, 11000);
    +
    + gpiod_set_value_cansleep(tdo_tl070wsh30->reset_gpio, 0);
    +
    + msleep(200);
    +
    + drm_panel_add(&tdo_tl070wsh30->base);
    +
    + return 0;
    +}
    +
    +static void tdo_tl070wsh30_panel_del(struct tdo_tl070wsh30_panel *tdo_tl070wsh30)
    +{
    + drm_panel_remove(&tdo_tl070wsh30->base);
    +}
    +
    +static int tdo_tl070wsh30_panel_probe(struct mipi_dsi_device *dsi)
    +{
    + struct tdo_tl070wsh30_panel *tdo_tl070wsh30;
    + int err;
    +
    + dsi->lanes = 4;
    + dsi->format = MIPI_DSI_FMT_RGB888;
    + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST | MIPI_DSI_MODE_LPM;
    +
    + tdo_tl070wsh30 = devm_kzalloc(&dsi->dev, sizeof(*tdo_tl070wsh30),
    + GFP_KERNEL);
    + if (!tdo_tl070wsh30)
    + return -ENOMEM;
    +
    + mipi_dsi_set_drvdata(dsi, tdo_tl070wsh30);
    + tdo_tl070wsh30->link = dsi;
    +
    + err = tdo_tl070wsh30_panel_add(tdo_tl070wsh30);
    + if (err < 0)
    + return err;
    +
    + return mipi_dsi_attach(dsi);
    +}
    +
    +static int tdo_tl070wsh30_panel_remove(struct mipi_dsi_device *dsi)
    +{
    + struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
    + int err;
    +
    + err = drm_panel_unprepare(&tdo_tl070wsh30->base);
    + if (err < 0)
    + dev_err(&dsi->dev, "failed to unprepare panel: %d\n", err);
    +
    + err = drm_panel_disable(&tdo_tl070wsh30->base);
    + if (err < 0)
    + dev_err(&dsi->dev, "failed to disable panel: %d\n", err);
    +
    + err = mipi_dsi_detach(dsi);
    + if (err < 0)
    + dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", err);
    +
    + tdo_tl070wsh30_panel_del(tdo_tl070wsh30);
    +
    + return 0;
    +}
    +
    +static void tdo_tl070wsh30_panel_shutdown(struct mipi_dsi_device *dsi)
    +{
    + struct tdo_tl070wsh30_panel *tdo_tl070wsh30 = mipi_dsi_get_drvdata(dsi);
    +
    + drm_panel_unprepare(&tdo_tl070wsh30->base);
    + drm_panel_disable(&tdo_tl070wsh30->base);
    +}
    +
    +static struct mipi_dsi_driver tdo_tl070wsh30_panel_driver = {
    + .driver = {
    + .name = "panel-tdo-tl070wsh30",
    + .of_match_table = tdo_tl070wsh30_of_match,
    + },
    + .probe = tdo_tl070wsh30_panel_probe,
    + .remove = tdo_tl070wsh30_panel_remove,
    + .shutdown = tdo_tl070wsh30_panel_shutdown,
    +};
    +module_mipi_dsi_driver(tdo_tl070wsh30_panel_driver);
    +
    +MODULE_AUTHOR("Neil Armstrong <narmstrong@baylibre.com>");
    +MODULE_DESCRIPTION("TDO TL070WSH30 panel driver");
    +MODULE_LICENSE("GPL v2");
    --
    2.22.0
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      Last update: 2020-09-07 13:27    [W:4.848 / U:0.104 seconds]
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