aboutsummaryrefslogtreecommitdiffstats
path: root/target/linux/brcm2708/patches-4.4/0443-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch
diff options
context:
space:
mode:
Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0443-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0443-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch390
1 files changed, 0 insertions, 390 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0443-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch b/target/linux/brcm2708/patches-4.4/0443-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch
deleted file mode 100644
index bd0623e4cd..0000000000
--- a/target/linux/brcm2708/patches-4.4/0443-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch
+++ /dev/null
@@ -1,390 +0,0 @@
-From 42c5ac14ecc2ce912ab1d95c1509db7a41bf2348 Mon Sep 17 00:00:00 2001
-From: Eric Anholt <eric@anholt.net>
-Date: Tue, 26 Apr 2016 13:46:13 -0700
-Subject: [PATCH] drm/panel: Add support for the Raspberry Pi 7" Touchscreen.
-
-Signed-off-by: Eric Anholt <eric@anholt.net>
----
- drivers/gpu/drm/panel/Kconfig | 9 +
- drivers/gpu/drm/panel/Makefile | 1 +
- .../gpu/drm/panel/panel-raspberrypi-touchscreen.c | 347 +++++++++++++++++++++
- 3 files changed, 357 insertions(+)
- create mode 100644 drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-
---- a/drivers/gpu/drm/panel/Kconfig
-+++ b/drivers/gpu/drm/panel/Kconfig
-@@ -31,6 +31,15 @@ config DRM_PANEL_LG_LG4573
- Say Y here if you want to enable support for LG4573 RGB panel.
- To compile this driver as a module, choose M here.
-
-+config DRM_PANEL_RASPBERRYPI_TOUCHSCREEN
-+ tristate "Raspberry Pi 7-inch touchscreen panel"
-+ depends on DRM_MIPI_DSI
-+ depends on BACKLIGHT_CLASS_DEVICE
-+ help
-+ Say Y here if you want to enable support for the Raspberry
-+ Pi 7" Touchscreen. To compile this driver as a module,
-+ choose M here.
-+
- config DRM_PANEL_SAMSUNG_S6E8AA0
- tristate "Samsung S6E8AA0 DSI video mode panel"
- depends on OF
---- a/drivers/gpu/drm/panel/Makefile
-+++ b/drivers/gpu/drm/panel/Makefile
-@@ -1,5 +1,6 @@
- obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o
- obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
-+obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen.o
- obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o
- obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o
- obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o
---- /dev/null
-+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-@@ -0,0 +1,347 @@
-+/*
-+ * Copyright © 2016 Broadcom Limited
-+ *
-+ * This program is free software; you can redistribute it and/or modify
-+ * it under the terms of the GNU General Public License version 2 as
-+ * published by the Free Software Foundation.
-+ *
-+ * Portions of this file (derived from panel-simple.c) are:
-+ *
-+ * Copyright (C) 2013, NVIDIA Corporation. All rights reserved.
-+ *
-+ * Permission is hereby granted, free of charge, to any person obtaining a
-+ * copy of this software and associated documentation files (the "Software"),
-+ * to deal in the Software without restriction, including without limitation
-+ * the rights to use, copy, modify, merge, publish, distribute, sub license,
-+ * and/or sell copies of the Software, and to permit persons to whom the
-+ * Software is furnished to do so, subject to the following conditions:
-+ *
-+ * The above copyright notice and this permission notice (including the
-+ * next paragraph) shall be included in all copies or substantial portions
-+ * of the Software.
-+ *
-+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-+ * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
-+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
-+ * DEALINGS IN THE SOFTWARE.
-+ */
-+
-+/**
-+ * DOC: Raspberry Pi 7" touchscreen panel driver.
-+ *
-+ * The 7" touchscreen consists of a DPI LCD panel, a Toshiba
-+ * TC358762XBG DSI-DPI bridge, and an I2C-connected Atmel ATTINY88-MUR
-+ * controlling power management, the LCD PWM, and the touchscreen.
-+ *
-+ * This driver presents this device as a MIPI DSI panel to the DRM
-+ * driver, and should expose the touchscreen as a HID device.
-+ */
-+
-+#include <linux/backlight.h>
-+#include <linux/delay.h>
-+#include <linux/err.h>
-+#include <linux/fb.h>
-+#include <linux/gpio.h>
-+#include <linux/gpio/consumer.h>
-+#include <linux/i2c.h>
-+#include <linux/module.h>
-+#include <linux/of.h>
-+#include <linux/of_device.h>
-+#include <linux/of_graph.h>
-+#include <linux/pm.h>
-+
-+#include <drm/drm_panel.h>
-+#include <drm/drmP.h>
-+#include <drm/drm_crtc.h>
-+#include <drm/drm_mipi_dsi.h>
-+#include <drm/drm_panel.h>
-+
-+struct rpi_touchscreen {
-+ struct drm_panel base;
-+ struct mipi_dsi_device *dsi;
-+ struct i2c_client *bridge_i2c;
-+ struct backlight_device *backlight;
-+
-+ bool prepared;
-+ bool enabled;
-+
-+ /* Version of the firmware on the bridge chip */
-+ int atmel_ver;
-+};
-+
-+static const struct drm_display_mode rpi_touchscreen_modes[] = {
-+ {
-+ /* This is assuming that we'll be running the DSI PLL
-+ * at 2Ghz / 3 (since we only get integer dividers),
-+ * so a pixel clock of 2Ghz / 3 / 8.
-+ */
-+ .clock = 83333,
-+ .hdisplay = 800,
-+ .hsync_start = 800 + 61,
-+ .hsync_end = 800 + 61 + 2,
-+ .htotal = 800 + 61 + 2 + 44,
-+ .vdisplay = 480,
-+ .vsync_start = 480 + 7,
-+ .vsync_end = 480 + 7 + 2,
-+ .vtotal = 480 + 7 + 2 + 21,
-+ .vrefresh = 60,
-+ },
-+};
-+
-+static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel)
-+{
-+ return container_of(panel, struct rpi_touchscreen, base);
-+}
-+
-+struct regdump {
-+ const char *reg;
-+ u32 offset;
-+};
-+
-+#define REGDUMP(reg) { #reg, reg }
-+
-+static int rpi_touchscreen_disable(struct drm_panel *panel)
-+{
-+ struct rpi_touchscreen *ts = panel_to_ts(panel);
-+ pr_err("disable\n");
-+
-+ if (!ts->enabled)
-+ return 0;
-+
-+ if (ts->backlight) {
-+ ts->backlight->props.power = FB_BLANK_POWERDOWN;
-+ backlight_update_status(ts->backlight);
-+ }
-+
-+ ts->enabled = false;
-+
-+ return 0;
-+}
-+
-+static int rpi_touchscreen_unprepare(struct drm_panel *panel)
-+{
-+ struct rpi_touchscreen *ts = panel_to_ts(panel);
-+
-+ if (!ts->prepared)
-+ return 0;
-+
-+ ts->prepared = false;
-+
-+ return 0;
-+}
-+
-+static int rpi_touchscreen_prepare(struct drm_panel *panel)
-+{
-+ struct rpi_touchscreen *ts = panel_to_ts(panel);
-+
-+ if (ts->prepared)
-+ return 0;
-+
-+ ts->prepared = true;
-+
-+ return 0;
-+}
-+
-+/*
-+ * Powers on the panel once the DSI link is up.
-+ *
-+ * The TC358762 is run in PLLOFF mode, where it usees the MIPI DSI
-+ * byte clock instead of an external reference clock. This means that
-+ * we need the DSI host to be on and transmitting before we start
-+ * talking to it.
-+ */
-+static int rpi_touchscreen_enable(struct drm_panel *panel)
-+{
-+ struct rpi_touchscreen *ts = panel_to_ts(panel);
-+
-+ if (ts->enabled)
-+ return 0;
-+
-+ if (ts->backlight) {
-+ ts->backlight->props.power = FB_BLANK_UNBLANK;
-+ backlight_update_status(ts->backlight);
-+ }
-+
-+ ts->enabled = true;
-+
-+ return 0;
-+}
-+
-+static int rpi_touchscreen_get_modes(struct drm_panel *panel)
-+{
-+ struct drm_connector *connector = panel->connector;
-+ struct drm_device *drm = panel->drm;
-+ unsigned int i, num = 0;
-+
-+ for (i = 0; i < ARRAY_SIZE(rpi_touchscreen_modes); i++) {
-+ const struct drm_display_mode *m = &rpi_touchscreen_modes[i];
-+ struct drm_display_mode *mode;
-+
-+ mode = drm_mode_duplicate(drm, m);
-+ if (!mode) {
-+ dev_err(drm->dev, "failed to add mode %ux%u@%u\n",
-+ m->hdisplay, m->vdisplay, m->vrefresh);
-+ continue;
-+ }
-+
-+ mode->type |= DRM_MODE_TYPE_DRIVER;
-+
-+ if (i == 0)
-+ mode->type |= DRM_MODE_TYPE_PREFERRED;
-+
-+ drm_mode_set_name(mode);
-+
-+ drm_mode_probed_add(connector, mode);
-+ num++;
-+ }
-+
-+ connector->display_info.bpc = 8;
-+ connector->display_info.width_mm = 217; /* XXX */
-+ connector->display_info.height_mm = 136; /* XXX */
-+
-+ return num;
-+}
-+
-+static int rpi_touchscreen_backlight_update(struct backlight_device *bl)
-+{
-+ int brightness = bl->props.brightness;
-+
-+ if (bl->props.power != FB_BLANK_UNBLANK ||
-+ bl->props.state & (BL_CORE_SUSPENDED | BL_CORE_FBBLANK))
-+ brightness = 0;
-+
-+ return 0;
-+}
-+
-+static const struct backlight_ops rpi_touchscreen_backlight_ops = {
-+ .update_status = rpi_touchscreen_backlight_update,
-+};
-+
-+static const struct drm_panel_funcs rpi_touchscreen_funcs = {
-+ .disable = rpi_touchscreen_disable,
-+ .unprepare = rpi_touchscreen_unprepare,
-+ .prepare = rpi_touchscreen_prepare,
-+ .enable = rpi_touchscreen_enable,
-+ .get_modes = rpi_touchscreen_get_modes,
-+};
-+
-+static struct i2c_client *rpi_touchscreen_get_i2c(struct device *dev,
-+ const char *name)
-+{
-+ struct device_node *node;
-+ struct i2c_client *client;
-+
-+ node = of_parse_phandle(dev->of_node, name, 0);
-+ if (!node)
-+ return ERR_PTR(-ENODEV);
-+
-+ client = of_find_i2c_device_by_node(node);
-+
-+ of_node_put(node);
-+
-+ return client;
-+}
-+
-+static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)
-+{
-+ struct device *dev = &dsi->dev;
-+ struct rpi_touchscreen *ts;
-+ int ret;
-+
-+ ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
-+ if (!ts)
-+ return -ENOMEM;
-+
-+ dev_set_drvdata(dev, ts);
-+
-+ ts->dsi = dsi;
-+ dsi->mode_flags = (MIPI_DSI_MODE_VIDEO |
-+ MIPI_DSI_MODE_VIDEO_SYNC_PULSE);
-+ dsi->format = MIPI_DSI_FMT_RGB888;
-+ dsi->lanes = 1;
-+
-+ ts->bridge_i2c =
-+ rpi_touchscreen_get_i2c(dev, "raspberrypi,touchscreen-bridge");
-+ if (!ts->bridge_i2c) {
-+ ret = -EPROBE_DEFER;
-+ return ret;
-+ }
-+
-+#if 0
-+ ts->backlight =
-+ devm_backlight_device_register(dev,
-+ "raspberrypi-touchscreen-backlight",
-+ dev, ts,
-+ &rpi_touchscreen_backlight_ops,
-+ NULL);
-+ if (IS_ERR(ts->backlight)) {
-+ DRM_ERROR("failed to register backlight\n");
-+ return PTR_ERR(ts->backlight);
-+ }
-+ ts->backlight->props.max_brightness = RPI_TOUCHSCREEN_MAX_BRIGHTNESS;
-+ ts->backlight->props.brightness = RPI_TOUCHSCREEN_MAX_BRIGHTNESS;
-+#endif
-+
-+ drm_panel_init(&ts->base);
-+ ts->base.dev = dev;
-+ ts->base.funcs = &rpi_touchscreen_funcs;
-+
-+ ret = drm_panel_add(&ts->base);
-+ if (ret < 0)
-+ goto err_release_bridge;
-+
-+ return mipi_dsi_attach(dsi);
-+
-+err_release_bridge:
-+ put_device(&ts->bridge_i2c->dev);
-+ return ret;
-+}
-+
-+static int rpi_touchscreen_dsi_remove(struct mipi_dsi_device *dsi)
-+{
-+ struct device *dev = &dsi->dev;
-+ struct rpi_touchscreen *ts = dev_get_drvdata(dev);
-+ int ret;
-+
-+ ret = mipi_dsi_detach(dsi);
-+ if (ret < 0) {
-+ dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
-+ return ret;
-+ }
-+
-+ drm_panel_detach(&ts->base);
-+ drm_panel_remove(&ts->base);
-+
-+ put_device(&ts->bridge_i2c->dev);
-+
-+ return 0;
-+}
-+
-+static void rpi_touchscreen_dsi_shutdown(struct mipi_dsi_device *dsi)
-+{
-+ /* XXX: poweroff */
-+}
-+
-+static const struct of_device_id rpi_touchscreen_of_match[] = {
-+ { .compatible = "raspberrypi,touchscreen" },
-+ { } /* sentinel */
-+};
-+MODULE_DEVICE_TABLE(of, rpi_touchscreen_of_match);
-+
-+static struct mipi_dsi_driver rpi_touchscreen_driver = {
-+ .driver = {
-+ .name = "raspberrypi-touchscreen",
-+ .of_match_table = rpi_touchscreen_of_match,
-+ },
-+ .probe = rpi_touchscreen_dsi_probe,
-+ .remove = rpi_touchscreen_dsi_remove,
-+ .shutdown = rpi_touchscreen_dsi_shutdown,
-+};
-+module_mipi_dsi_driver(rpi_touchscreen_driver);
-+
-+MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
-+MODULE_DESCRIPTION("Raspberry Pi 7-inch touchscreen driver");
-+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-21 19:19:37 +0000