Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
drm: panel: Add a panel driver for the Summit display
This is the display panel used for the touchbar on laptops that have it.
Co-developed-by: Nick Chan <towinchenmi@gmail.com>
Signed-off-by: Nick Chan <towinchenmi@gmail.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Reviewed-by: Neal Gompa <neal@gompa.dev>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@gmail.com>
Link: https://lore.kernel.org/r/20250217-adpdrm-v7-3-ca2e44b3c7d8@gmail.com
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250217-adpdrm-v7-3-ca2e44b3c7d8@gmail.com
authored by
Sasha Finkelstein
and committed by
Neil Armstrong
40115947
d34bd3c7
+142
+9
drivers/gpu/drm/panel/Kconfig
+9
drivers/gpu/drm/panel/Kconfig
···
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that it can be automatically turned off when the panel goes into a
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low power state.
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config DRM_PANEL_SUMMIT
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tristate "Apple Summit display panel"
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depends on OF
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depends on DRM_MIPI_DSI
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depends on BACKLIGHT_CLASS_DEVICE
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help
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Say Y if you want to enable support for the "Summit" display panel
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used as a touchbar on certain Apple laptops.
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config DRM_PANEL_SYNAPTICS_R63353
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tristate "Synaptics R63353-based panels"
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depends on OF
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drivers/gpu/drm/panel/Makefile
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drivers/gpu/drm/panel/Makefile
···
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obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o
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obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
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obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
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obj-$(CONFIG_DRM_PANEL_SUMMIT) += panel-summit.o
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obj-$(CONFIG_DRM_PANEL_SYNAPTICS_R63353) += panel-synaptics-r63353.o
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obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
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obj-$(CONFIG_DRM_PANEL_SONY_TD4353_JDI) += panel-sony-td4353-jdi.o
+132
drivers/gpu/drm/panel/panel-summit.c
+132
drivers/gpu/drm/panel/panel-summit.c
···
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// SPDX-License-Identifier: GPL-2.0-only
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#include <linux/backlight.h>
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#include <drm/drm_device.h>
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#include <drm/drm_mipi_dsi.h>
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#include <drm/drm_mode.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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#include <drm/drm_probe_helper.h>
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#include <video/mipi_display.h>
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struct summit_data {
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struct mipi_dsi_device *dsi;
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struct backlight_device *bl;
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struct drm_panel panel;
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};
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static int summit_set_brightness(struct device *dev)
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{
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struct summit_data *s_data = dev_get_drvdata(dev);
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int level = backlight_get_brightness(s_data->bl);
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return mipi_dsi_dcs_set_display_brightness(s_data->dsi, level);
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}
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static int summit_bl_update_status(struct backlight_device *dev)
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{
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return summit_set_brightness(&dev->dev);
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}
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static const struct backlight_ops summit_bl_ops = {
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.update_status = summit_bl_update_status,
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};
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static struct drm_display_mode summit_mode = {
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.vdisplay = 2008,
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.hdisplay = 60,
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.hsync_start = 60 + 8,
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.hsync_end = 60 + 8 + 80,
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.htotal = 60 + 8 + 80 + 40,
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.vsync_start = 2008 + 1,
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.vsync_end = 2008 + 1 + 15,
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.vtotal = 2008 + 1 + 15 + 6,
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.clock = ((60 + 8 + 80 + 40) * (2008 + 1 + 15 + 6) * 60) / 1000,
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.type = DRM_MODE_TYPE_DRIVER,
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.flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC,
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};
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static int summit_get_modes(struct drm_panel *panel,
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struct drm_connector *connector)
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{
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connector->display_info.non_desktop = true;
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drm_object_property_set_value(&connector->base,
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connector->dev->mode_config.non_desktop_property,
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connector->display_info.non_desktop);
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return drm_connector_helper_get_modes_fixed(connector, &summit_mode);
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}
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static const struct drm_panel_funcs summit_panel_funcs = {
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.get_modes = summit_get_modes,
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};
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static int summit_probe(struct mipi_dsi_device *dsi)
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{
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struct backlight_properties props = { 0 };
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struct device *dev = &dsi->dev;
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struct summit_data *s_data;
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int ret;
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s_data = devm_kzalloc(dev, sizeof(*s_data), GFP_KERNEL);
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if (!s_data)
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return -ENOMEM;
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mipi_dsi_set_drvdata(dsi, s_data);
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s_data->dsi = dsi;
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ret = device_property_read_u32(dev, "max-brightness", &props.max_brightness);
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if (ret)
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return ret;
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props.type = BACKLIGHT_RAW;
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s_data->bl = devm_backlight_device_register(dev, dev_name(dev),
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dev, s_data, &summit_bl_ops, &props);
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if (IS_ERR(s_data->bl))
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return PTR_ERR(s_data->bl);
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drm_panel_init(&s_data->panel, dev, &summit_panel_funcs,
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DRM_MODE_CONNECTOR_DSI);
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drm_panel_add(&s_data->panel);
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return mipi_dsi_attach(dsi);
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}
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static void summit_remove(struct mipi_dsi_device *dsi)
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{
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struct summit_data *s_data = mipi_dsi_get_drvdata(dsi);
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mipi_dsi_detach(dsi);
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drm_panel_remove(&s_data->panel);
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}
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static int summit_suspend(struct device *dev)
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{
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struct summit_data *s_data = dev_get_drvdata(dev);
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return mipi_dsi_dcs_set_display_brightness(s_data->dsi, 0);
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}
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static DEFINE_SIMPLE_DEV_PM_OPS(summit_pm_ops, summit_suspend,
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summit_set_brightness);
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static const struct of_device_id summit_of_match[] = {
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{ .compatible = "apple,summit" },
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{},
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};
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MODULE_DEVICE_TABLE(of, summit_of_match);
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static struct mipi_dsi_driver summit_driver = {
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.probe = summit_probe,
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.remove = summit_remove,
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.driver = {
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.name = "panel-summit",
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.of_match_table = summit_of_match,
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.pm = pm_sleep_ptr(&summit_pm_ops),
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},
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};
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module_mipi_dsi_driver(summit_driver);
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MODULE_DESCRIPTION("Summit Display Panel Driver");
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MODULE_LICENSE("GPL");