diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.14/950-0126-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.14/950-0126-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch | 576 |
1 files changed, 0 insertions, 576 deletions
diff --git a/target/linux/brcm2708/patches-4.14/950-0126-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch b/target/linux/brcm2708/patches-4.14/950-0126-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch deleted file mode 100644 index 0f1abf00f4..0000000000 --- a/target/linux/brcm2708/patches-4.14/950-0126-drm-panel-Add-support-for-the-Raspberry-Pi-7-Touchsc.patch +++ /dev/null @@ -1,576 +0,0 @@ -From a28a55876fa9df72d7e3c1bc0fc2ea4bd65337f0 Mon Sep 17 00:00:00 2001 -From: Eric Anholt <eric@anholt.net> -Date: Tue, 26 Apr 2016 13:46:13 -0700 -Subject: [PATCH 126/454] drm/panel: Add support for the Raspberry Pi 7" - Touchscreen. - -This driver communicates with the Atmel microcontroller for sequencing -the poweron of the TC358762 DSI-DPI bridge and controlling the -backlight PWM. - -The following lines are required in config.txt, to keep the firmware -from trying to bash our I2C lines and steal the DSI interrupts: - - disable_touchscreen=1 - ignore_lcd=2 - mask_gpu_interrupt1=0x1000 - -This means that the firmware won't power on the panel at boot time (no -rainbow) and the touchscreen input won't work. The native input -driver for the touchscreen still needs to be written. - -v2: Set the same default orientation as the closed source firmware - used, which is the best for viewing angle. - -Signed-off-by: Eric Anholt <eric@anholt.net> ---- - drivers/gpu/drm/panel/Kconfig | 8 + - drivers/gpu/drm/panel/Makefile | 1 + - .../drm/panel/panel-raspberrypi-touchscreen.c | 514 ++++++++++++++++++ - 3 files changed, 523 insertions(+) - create mode 100644 drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c - ---- a/drivers/gpu/drm/panel/Kconfig -+++ b/drivers/gpu/drm/panel/Kconfig -@@ -73,6 +73,14 @@ config DRM_PANEL_PANASONIC_VVX10F034N00 - WUXGA (1920x1200) Novatek NT1397-based DSI panel as found in some - Xperia Z2 tablets - -+config DRM_PANEL_RASPBERRYPI_TOUCHSCREEN -+ tristate "Raspberry Pi 7-inch touchscreen panel" -+ depends on DRM_MIPI_DSI -+ 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_S6E3HA2 - tristate "Samsung S6E3HA2 DSI video mode panel" - depends on OF ---- a/drivers/gpu/drm/panel/Makefile -+++ b/drivers/gpu/drm/panel/Makefile -@@ -5,6 +5,7 @@ obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) - obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o - obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o - obj-$(CONFIG_DRM_PANEL_PANASONIC_VVX10F034N00) += panel-panasonic-vvx10f034n00.o -+obj-$(CONFIG_DRM_PANEL_RASPBERRYPI_TOUCHSCREEN) += panel-raspberrypi-touchscreen.o - obj-$(CONFIG_DRM_PANEL_SAMSUNG_LD9040) += panel-samsung-ld9040.o - obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E3HA2) += panel-samsung-s6e3ha2.o - obj-$(CONFIG_DRM_PANEL_SAMSUNG_S6E8AA0) += panel-samsung-s6e8aa0.o ---- /dev/null -+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c -@@ -0,0 +1,514 @@ -+/* -+ * Copyright © 2016 Broadcom -+ * -+ * 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/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> -+ -+/* I2C registers of the Atmel microcontroller. */ -+enum REG_ADDR { -+ REG_ID = 0x80, -+ REG_PORTA, // BIT(2) for horizontal flip, BIT(3) for vertical flip -+ REG_PORTB, -+ REG_PORTC, -+ REG_PORTD, -+ REG_POWERON, -+ REG_PWM, -+ REG_DDRA, -+ REG_DDRB, -+ REG_DDRC, -+ REG_DDRD, -+ REG_TEST, -+ REG_WR_ADDRL, -+ REG_WR_ADDRH, -+ REG_READH, -+ REG_READL, -+ REG_WRITEH, -+ REG_WRITEL, -+ REG_ID2, -+}; -+ -+/* We only turn the PWM on or off, without varying values. */ -+#define RPI_TOUCHSCREEN_MAX_BRIGHTNESS 1 -+ -+/* DSI D-PHY Layer Registers */ -+#define D0W_DPHYCONTTX 0x0004 -+#define CLW_DPHYCONTRX 0x0020 -+#define D0W_DPHYCONTRX 0x0024 -+#define D1W_DPHYCONTRX 0x0028 -+#define COM_DPHYCONTRX 0x0038 -+#define CLW_CNTRL 0x0040 -+#define D0W_CNTRL 0x0044 -+#define D1W_CNTRL 0x0048 -+#define DFTMODE_CNTRL 0x0054 -+ -+/* DSI PPI Layer Registers */ -+#define PPI_STARTPPI 0x0104 -+#define PPI_BUSYPPI 0x0108 -+#define PPI_LINEINITCNT 0x0110 -+#define PPI_LPTXTIMECNT 0x0114 -+//#define PPI_LANEENABLE 0x0134 -+//#define PPI_TX_RX_TA 0x013C -+#define PPI_CLS_ATMR 0x0140 -+#define PPI_D0S_ATMR 0x0144 -+#define PPI_D1S_ATMR 0x0148 -+#define PPI_D0S_CLRSIPOCOUNT 0x0164 -+#define PPI_D1S_CLRSIPOCOUNT 0x0168 -+#define CLS_PRE 0x0180 -+#define D0S_PRE 0x0184 -+#define D1S_PRE 0x0188 -+#define CLS_PREP 0x01A0 -+#define D0S_PREP 0x01A4 -+#define D1S_PREP 0x01A8 -+#define CLS_ZERO 0x01C0 -+#define D0S_ZERO 0x01C4 -+#define D1S_ZERO 0x01C8 -+#define PPI_CLRFLG 0x01E0 -+#define PPI_CLRSIPO 0x01E4 -+#define HSTIMEOUT 0x01F0 -+#define HSTIMEOUTENABLE 0x01F4 -+ -+/* DSI Protocol Layer Registers */ -+#define DSI_STARTDSI 0x0204 -+#define DSI_BUSYDSI 0x0208 -+#define DSI_LANEENABLE 0x0210 -+# define DSI_LANEENABLE_CLOCK BIT(0) -+# define DSI_LANEENABLE_D0 BIT(1) -+# define DSI_LANEENABLE_D1 BIT(2) -+ -+#define DSI_LANESTATUS0 0x0214 -+#define DSI_LANESTATUS1 0x0218 -+#define DSI_INTSTATUS 0x0220 -+#define DSI_INTMASK 0x0224 -+#define DSI_INTCLR 0x0228 -+#define DSI_LPTXTO 0x0230 -+#define DSI_MODE 0x0260 -+#define DSI_PAYLOAD0 0x0268 -+#define DSI_PAYLOAD1 0x026C -+#define DSI_SHORTPKTDAT 0x0270 -+#define DSI_SHORTPKTREQ 0x0274 -+#define DSI_BTASTA 0x0278 -+#define DSI_BTACLR 0x027C -+ -+/* DSI General Registers */ -+#define DSIERRCNT 0x0300 -+#define DSISIGMOD 0x0304 -+ -+/* DSI Application Layer Registers */ -+#define APLCTRL 0x0400 -+#define APLSTAT 0x0404 -+#define APLERR 0x0408 -+#define PWRMOD 0x040C -+#define RDPKTLN 0x0410 -+#define PXLFMT 0x0414 -+#define MEMWRCMD 0x0418 -+ -+/* LCDC/DPI Host Registers */ -+#define LCDCTRL 0x0420 -+#define HSR 0x0424 -+#define HDISPR 0x0428 -+#define VSR 0x042C -+#define VDISPR 0x0430 -+#define VFUEN 0x0434 -+ -+/* DBI-B Host Registers */ -+#define DBIBCTRL 0x0440 -+ -+/* SPI Master Registers */ -+#define SPICMR 0x0450 -+#define SPITCR 0x0454 -+ -+/* System Controller Registers */ -+#define SYSSTAT 0x0460 -+#define SYSCTRL 0x0464 -+#define SYSPLL1 0x0468 -+#define SYSPLL2 0x046C -+#define SYSPLL3 0x0470 -+#define SYSPMCTRL 0x047C -+ -+/* GPIO Registers */ -+#define GPIOC 0x0480 -+#define GPIOO 0x0484 -+#define GPIOI 0x0488 -+ -+/* I2C Registers */ -+#define I2CCLKCTRL 0x0490 -+ -+/* Chip/Rev Registers */ -+#define IDREG 0x04A0 -+ -+/* Debug Registers */ -+#define WCMDQUEUE 0x0500 -+#define RCMDQUEUE 0x0504 -+ -+struct rpi_touchscreen { -+ struct drm_panel base; -+ struct mipi_dsi_device *dsi; -+ struct i2c_client *bridge_i2c; -+ -+ /* Version of the firmware on the bridge chip */ -+ int atmel_ver; -+}; -+ -+static const struct drm_display_mode rpi_touchscreen_modes[] = { -+ { -+ /* The DSI PLL can only integer divide from the 2Ghz -+ * PLLD, giving us few choices. We pick a divide by 3 -+ * as our DSI HS clock, giving us a pixel clock of -+ * that divided by 24 bits. Pad out HFP to get our -+ * panel to refresh at 60Hz, even if that doesn't -+ * match the datasheet. -+ */ -+#define PIXEL_CLOCK ((2000000000 / 3) / 24) -+#define VREFRESH 60 -+#define VTOTAL (480 + 7 + 2 + 21) -+#define HACT 800 -+#define HSW 2 -+#define HBP 46 -+#define HFP ((PIXEL_CLOCK / (VTOTAL * VREFRESH)) - (HACT + HSW + HBP)) -+ -+ .clock = PIXEL_CLOCK / 1000, -+ .hdisplay = HACT, -+ .hsync_start = HACT + HFP, -+ .hsync_end = HACT + HFP + HSW, -+ .htotal = HACT + HFP + HSW + HBP, -+ .vdisplay = 480, -+ .vsync_start = 480 + 7, -+ .vsync_end = 480 + 7 + 2, -+ .vtotal = VTOTAL, -+ .vrefresh = 60, -+ }, -+}; -+ -+static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel) -+{ -+ return container_of(panel, struct rpi_touchscreen, base); -+} -+ -+static u8 rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg) -+{ -+ return i2c_smbus_read_byte_data(ts->bridge_i2c, reg); -+} -+ -+static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts, -+ u8 reg, u8 val) -+{ -+ int ret; -+ -+ ret = i2c_smbus_write_byte_data(ts->bridge_i2c, reg, val); -+ if (ret) -+ dev_err(&ts->dsi->dev, "I2C write failed: %d\n", ret); -+} -+ -+static int rpi_touchscreen_write(struct rpi_touchscreen *ts, u16 reg, u32 val) -+{ -+#if 0 -+ /* The firmware uses LP DSI transactions like this to bring up -+ * the hardware, which should be faster than using I2C to then -+ * pass to the Toshiba. However, I was unable to get it to -+ * work. -+ */ -+ u8 msg[] = { -+ reg, -+ reg >> 8, -+ val, -+ val >> 8, -+ val >> 16, -+ val >> 24, -+ }; -+ -+ mipi_dsi_dcs_write_buffer(ts->dsi, msg, sizeof(msg)); -+#else -+ rpi_touchscreen_i2c_write(ts, REG_WR_ADDRH, reg >> 8); -+ rpi_touchscreen_i2c_write(ts, REG_WR_ADDRL, reg); -+ rpi_touchscreen_i2c_write(ts, REG_WRITEH, val >> 8); -+ rpi_touchscreen_i2c_write(ts, REG_WRITEL, val); -+#endif -+ -+ return 0; -+} -+ -+static int rpi_touchscreen_disable(struct drm_panel *panel) -+{ -+ struct rpi_touchscreen *ts = panel_to_ts(panel); -+ -+ rpi_touchscreen_i2c_write(ts, REG_PWM, 0); -+ -+ rpi_touchscreen_i2c_write(ts, REG_POWERON, 0); -+ udelay(1); -+ -+ return 0; -+} -+ -+static int rpi_touchscreen_noop(struct drm_panel *panel) -+{ -+ return 0; -+} -+ -+static int rpi_touchscreen_enable(struct drm_panel *panel) -+{ -+ struct rpi_touchscreen *ts = panel_to_ts(panel); -+ int i; -+ -+ rpi_touchscreen_i2c_write(ts, REG_POWERON, 1); -+ /* Wait for nPWRDWN to go low to indicate poweron is done. */ -+ for (i = 0; i < 100; i++) { -+ if (rpi_touchscreen_i2c_read(ts, REG_PORTB) & 1) -+ break; -+ } -+ -+ rpi_touchscreen_write(ts, DSI_LANEENABLE, -+ DSI_LANEENABLE_CLOCK | -+ DSI_LANEENABLE_D0 | -+ (ts->dsi->lanes > 1 ? DSI_LANEENABLE_D1 : 0)); -+ rpi_touchscreen_write(ts, PPI_D0S_CLRSIPOCOUNT, 0x05); -+ rpi_touchscreen_write(ts, PPI_D1S_CLRSIPOCOUNT, 0x05); -+ rpi_touchscreen_write(ts, PPI_D0S_ATMR, 0x00); -+ rpi_touchscreen_write(ts, PPI_D1S_ATMR, 0x00); -+ rpi_touchscreen_write(ts, PPI_LPTXTIMECNT, 0x03); -+ -+ rpi_touchscreen_write(ts, SPICMR, 0x00); -+ rpi_touchscreen_write(ts, LCDCTRL, 0x00100150); -+ rpi_touchscreen_write(ts, SYSCTRL, 0x040f); -+ msleep(100); -+ -+ rpi_touchscreen_write(ts, PPI_STARTPPI, 0x01); -+ rpi_touchscreen_write(ts, DSI_STARTDSI, 0x01); -+ msleep(100); -+ -+ /* Turn on the backlight. */ -+ rpi_touchscreen_i2c_write(ts, REG_PWM, 255); -+ -+ /* Default to the same orientation as the closed source -+ * firmware used for the panel. Runtime rotation -+ * configuration will be supported using VC4's plane -+ * orientation bits. -+ */ -+ rpi_touchscreen_i2c_write(ts, REG_PORTA, BIT(2)); -+ -+ 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 = 154; -+ connector->display_info.height_mm = 86; -+ -+ return num; -+} -+ -+static const struct drm_panel_funcs rpi_touchscreen_funcs = { -+ .disable = rpi_touchscreen_disable, -+ .unprepare = rpi_touchscreen_noop, -+ .prepare = rpi_touchscreen_noop, -+ .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, ver; -+ -+ 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 | -+ MIPI_DSI_MODE_LPM); -+ dsi->format = MIPI_DSI_FMT_RGB888; -+ dsi->lanes = 1; -+ -+ ts->bridge_i2c = -+ rpi_touchscreen_get_i2c(dev, "raspberrypi,touchscreen-bridge"); -+ if (IS_ERR(ts->bridge_i2c)) { -+ ret = -EPROBE_DEFER; -+ return ret; -+ } -+ -+ ver = rpi_touchscreen_i2c_read(ts, REG_ID); -+ if (ver < 0) { -+ dev_err(dev, "Atmel I2C read failed: %d\n", ver); -+ return -ENODEV; -+ } -+ -+ switch (ver) { -+ case 0xde: -+ ts->atmel_ver = 1; -+ break; -+ case 0xc3: -+ ts->atmel_ver = 2; -+ break; -+ default: -+ dev_err(dev, "Unknown Atmel firmware revision: 0x%02x\n", ver); -+ return -ENODEV; -+ } -+ -+ /* Turn off at boot, so we can cleanly sequence powering on. */ -+ rpi_touchscreen_i2c_write(ts, REG_POWERON, 0); -+ -+ 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) -+{ -+ struct device *dev = &dsi->dev; -+ struct rpi_touchscreen *ts = dev_get_drvdata(dev); -+ -+ rpi_touchscreen_i2c_write(ts, REG_POWERON, 0); -+} -+ -+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"); |