diff options
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.patch | 390 |
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 bd0623e..0000000 --- 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"); |