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Message-Id: <20241126-adpdrm-v2-3-c90485336c09@gmail.com>
Date: Tue, 26 Nov 2024 17:34:22 +0100
From: Sasha Finkelstein via B4 Relay <devnull+fnkl.kernel.gmail.com@...nel.org>
To: Hector Martin <marcan@...can.st>, Sven Peter <sven@...npeter.dev>,
Alyssa Rosenzweig <alyssa@...enzweig.io>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>,
David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Neil Armstrong <neil.armstrong@...aro.org>,
Jessica Zhang <quic_jesszhan@...cinc.com>, asahi@...ts.linux.dev
Cc: linux-arm-kernel@...ts.infradead.org, dri-devel@...ts.freedesktop.org,
devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
Sasha Finkelstein <fnkl.kernel@...il.com>,
Nick Chan <towinchenmi@...il.com>
Subject: [PATCH v2 3/5] drm: panel: Add a panel driver for the Summit
display
From: Sasha Finkelstein <fnkl.kernel@...il.com>
This is the display panel used for the touchbar on laptops that have it.
Co-developed-by: Nick Chan <towinchenmi@...il.com>
Signed-off-by: Nick Chan <towinchenmi@...il.com>
Signed-off-by: Sasha Finkelstein <fnkl.kernel@...il.com>
---
drivers/gpu/drm/panel/Kconfig | 9 +++
drivers/gpu/drm/panel/Makefile | 1 +
drivers/gpu/drm/panel/panel-summit.c | 143 +++++++++++++++++++++++++++++++++++
3 files changed, 153 insertions(+)
diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
index d7469c565d1db8b8e974dd6c45d03d9352d99d63..5085a82e4bc695e85cabbc3200859bbe10cb0f91 100644
--- a/drivers/gpu/drm/panel/Kconfig
+++ b/drivers/gpu/drm/panel/Kconfig
@@ -925,6 +925,15 @@ config DRM_PANEL_SIMPLE
that it can be automatically turned off when the panel goes into a
low power state.
+config DRM_PANEL_SUMMIT
+ tristate "Apple Summit display panel"
+ depends on OF
+ depends on DRM_MIPI_DSI
+ depends on BACKLIGHT_CLASS_DEVICE
+ help
+ Say Y if you want to enable support for the "Summit" display panel
+ used as a touchbar on certain Apple laptops.
+
config DRM_PANEL_SYNAPTICS_R63353
tristate "Synaptics R63353-based panels"
depends on OF
diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
index 7dcf72646cacff11bab90c78e3b8b1f357e5f14a..10ac2e850f5cd6d6546439de75483466e4015d1a 100644
--- a/drivers/gpu/drm/panel/Makefile
+++ b/drivers/gpu/drm/panel/Makefile
@@ -89,6 +89,7 @@ obj-$(CONFIG_DRM_PANEL_SHARP_LS060T1SX01) += panel-sharp-ls060t1sx01.o
obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7701) += panel-sitronix-st7701.o
obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7703) += panel-sitronix-st7703.o
obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V) += panel-sitronix-st7789v.o
+obj-$(CONFIG_DRM_PANEL_SUMMIT) += panel-summit.o
obj-$(CONFIG_DRM_PANEL_SYNAPTICS_R63353) += panel-synaptics-r63353.o
obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
obj-$(CONFIG_DRM_PANEL_SONY_TD4353_JDI) += panel-sony-td4353-jdi.o
diff --git a/drivers/gpu/drm/panel/panel-summit.c b/drivers/gpu/drm/panel/panel-summit.c
new file mode 100644
index 0000000000000000000000000000000000000000..16bd9fa1213d7bc3f022b878ea5cfeadbd468995
--- /dev/null
+++ b/drivers/gpu/drm/panel/panel-summit.c
@@ -0,0 +1,143 @@
+// SPDX-License-Identifier: GPL-2.0-only
+
+#include <linux/backlight.h>
+#include <drm/drm_device.h>
+#include <drm/drm_mipi_dsi.h>
+#include <drm/drm_mode.h>
+#include <drm/drm_modes.h>
+#include <drm/drm_panel.h>
+#include <video/mipi_display.h>
+
+struct summit_data {
+ struct mipi_dsi_device *dsi;
+ struct backlight_device *bl;
+ struct drm_panel panel;
+};
+
+static int summit_set_brightness(struct device *dev)
+{
+ struct summit_data *s_data = dev_get_drvdata(dev);
+ int level = backlight_get_brightness(s_data->bl);
+
+ return mipi_dsi_dcs_set_display_brightness(s_data->dsi, level);
+}
+
+static int summit_bl_update_status(struct backlight_device *dev)
+{
+ return summit_set_brightness(&dev->dev);
+}
+
+static int summit_bl_get_brightness(struct backlight_device *dev)
+{
+ return backlight_get_brightness(dev);
+}
+
+static const struct backlight_ops summit_bl_ops = {
+ .get_brightness = summit_bl_get_brightness,
+ .update_status = summit_bl_update_status,
+};
+
+static int summit_get_modes(struct drm_panel *panel,
+ struct drm_connector *connector)
+{
+ struct drm_display_mode *mode = drm_mode_create(connector->dev);
+
+ connector->display_info.non_desktop = true;
+ drm_object_property_set_value(&connector->base,
+ connector->dev->mode_config.non_desktop_property,
+ connector->display_info.non_desktop);
+
+ mode->vdisplay = 2008;
+ mode->hdisplay = 60;
+ mode->hsync_start = mode->hdisplay + 8;
+ mode->hsync_end = mode->hsync_start + 80;
+ mode->htotal = mode->hsync_end + 40;
+ mode->vsync_start = mode->vdisplay + 1;
+ mode->vsync_end = mode->vsync_start + 15;
+ mode->vtotal = mode->vsync_end + 6;
+ mode->clock = (mode->vtotal * mode->htotal * 60) / 1000;
+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
+ mode->flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NVSYNC;
+ drm_mode_set_name(mode);
+ drm_mode_probed_add(connector, mode);
+ return 1;
+}
+
+static const struct drm_panel_funcs summit_panel_funcs = {
+ .get_modes = summit_get_modes,
+};
+
+static int summit_probe(struct mipi_dsi_device *dsi)
+{
+ struct backlight_properties props = { 0 };
+ struct device *dev = &dsi->dev;
+ struct summit_data *s_data;
+ int ret;
+
+ s_data = devm_kzalloc(dev, sizeof(*s_data), GFP_KERNEL);
+ if (!s_data)
+ return -ENOMEM;
+
+ mipi_dsi_set_drvdata(dsi, s_data);
+ s_data->dsi = dsi;
+
+ ret = device_property_read_u32(dev, "max-brightness", &props.max_brightness);
+ if (ret)
+ return ret;
+ props.type = BACKLIGHT_RAW;
+
+ s_data->bl = devm_backlight_device_register(dev, dev_name(dev),
+ dev, s_data, &summit_bl_ops, &props);
+ if (IS_ERR(s_data->bl))
+ return PTR_ERR(s_data->bl);
+
+ drm_panel_init(&s_data->panel, dev, &summit_panel_funcs,
+ DRM_MODE_CONNECTOR_DSI);
+ drm_panel_add(&s_data->panel);
+
+ return mipi_dsi_attach(dsi);
+}
+
+static void summit_remove(struct mipi_dsi_device *dsi)
+{
+ struct summit_data *s_data = mipi_dsi_get_drvdata(dsi);
+
+ mipi_dsi_detach(dsi);
+ drm_panel_remove(&s_data->panel);
+}
+
+static int summit_resume(struct device *dev)
+{
+ return summit_set_brightness(dev);
+}
+
+static int summit_suspend(struct device *dev)
+{
+ struct summit_data *s_data = dev_get_drvdata(dev);
+
+ return mipi_dsi_dcs_set_display_brightness(s_data->dsi, 0);
+}
+
+static DEFINE_SIMPLE_DEV_PM_OPS(summit_pm_ops, summit_suspend,
+ summit_resume);
+
+static const struct of_device_id summit_of_match[] = {
+ { .compatible = "apple,summit" },
+ {},
+};
+
+MODULE_DEVICE_TABLE(of, summit_of_match);
+
+static struct mipi_dsi_driver summit_driver = {
+ .probe = summit_probe,
+ .remove = summit_remove,
+ .driver = {
+ .name = "panel-summit",
+ .of_match_table = summit_of_match,
+ .pm = pm_sleep_ptr(&summit_pm_ops),
+ },
+};
+module_mipi_dsi_driver(summit_driver);
+
+MODULE_DESCRIPTION("Summit Display Panel Driver");
+MODULE_LICENSE("GPL");
--
2.47.1
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