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Diffstat (limited to 'meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0004-drm-panel-Backport-4.15-support-for-the-Raspberry-Pi.patch')
-rw-r--r--meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0004-drm-panel-Backport-4.15-support-for-the-Raspberry-Pi.patch418
1 files changed, 0 insertions, 418 deletions
diff --git a/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0004-drm-panel-Backport-4.15-support-for-the-Raspberry-Pi.patch b/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0004-drm-panel-Backport-4.15-support-for-the-Raspberry-Pi.patch
deleted file mode 100644
index 17c32750b..000000000
--- a/meta-agl-bsp/meta-raspberrypi/recipes-kernel/linux/linux-raspberrypi/dsi/0004-drm-panel-Backport-4.15-support-for-the-Raspberry-Pi.patch
+++ /dev/null
@@ -1,418 +0,0 @@
-From 7f745c7e13b50911424b9bbb4181d4dc72ef155f Mon Sep 17 00:00:00 2001
-From: Kevin Quigley <kevin@kquigley.co.uk>
-Date: Mon, 24 Sep 2018 12:14:41 +0000
-Subject: [PATCH 4/4] drm/panel: Backport 4.15 support for the Raspberry Pi 7"
- Touchscreen
-
----
- .../drm/panel/panel-raspberrypi-touchscreen.c | 242 ++++++++----------
- 1 file changed, 111 insertions(+), 131 deletions(-)
-
-diff --git a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-index 128523d8d518..2c9c9722734f 100644
---- a/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-+++ b/drivers/gpu/drm/panel/panel-raspberrypi-touchscreen.c
-@@ -1,5 +1,5 @@
- /*
-- * Copyright © 2016 Broadcom
-+ * Copyright © 2016-2017 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
-@@ -30,14 +30,15 @@
- */
-
- /**
-- * DOC: Raspberry Pi 7" touchscreen panel driver.
-+ * 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.
-+ * controlling power management, the LCD PWM, and initial register
-+ * setup of the Tohsiba.
- *
-- * This driver presents this device as a MIPI DSI panel to the DRM
-- * driver, and should expose the touchscreen as a HID device.
-+ * This driver controls the TC358762 and ATTINY88, presenting a DSI
-+ * device with a drm_panel.
- */
-
- #include <linux/delay.h>
-@@ -58,10 +59,12 @@
- #include <drm/drm_mipi_dsi.h>
- #include <drm/drm_panel.h>
-
-+#define RPI_DSI_DRIVER_NAME "rpi-ts-dsi"
-+
- /* 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_PORTA, /* BIT(2) for horizontal flip, BIT(3) for vertical flip */
- REG_PORTB,
- REG_PORTC,
- REG_PORTD,
-@@ -81,9 +84,6 @@ enum REG_ADDR {
- 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
-@@ -100,8 +100,6 @@ enum REG_ADDR {
- #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
-@@ -197,43 +195,23 @@ enum REG_ADDR {
- 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;
-+ struct i2c_client *i2c;
- };
-
- 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))
--
-- /* Round up the pixel clock a bit (10khz), so that the
-- * "don't run things faster than the requested clock
-- * rate" rule of the clk driver doesn't reject the
-- * divide-by-3 mode due to rounding error.
-+ /* Modeline comes from the Raspberry Pi firmware, with HFP=1
-+ * plugged in and clock re-computed from that.
- */
-- .clock = PIXEL_CLOCK / 1000 + 10,
-- .hdisplay = HACT,
-- .hsync_start = HACT + HFP,
-- .hsync_end = HACT + HFP + HSW,
-- .htotal = HACT + HFP + HSW + HBP,
-+ .clock = 25979400 / 1000,
-+ .hdisplay = 800,
-+ .hsync_start = 800 + 1,
-+ .hsync_end = 800 + 1 + 2,
-+ .htotal = 800 + 1 + 2 + 46,
- .vdisplay = 480,
- .vsync_start = 480 + 7,
- .vsync_end = 480 + 7 + 2,
-- .vtotal = VTOTAL,
-+ .vtotal = 480 + 7 + 2 + 21,
- .vrefresh = 60,
- },
- };
-@@ -245,7 +223,7 @@ static struct rpi_touchscreen *panel_to_ts(struct drm_panel *panel)
-
- static int rpi_touchscreen_i2c_read(struct rpi_touchscreen *ts, u8 reg)
- {
-- return i2c_smbus_read_byte_data(ts->bridge_i2c, reg);
-+ return i2c_smbus_read_byte_data(ts->i2c, reg);
- }
-
- static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts,
-@@ -253,19 +231,13 @@ static void rpi_touchscreen_i2c_write(struct rpi_touchscreen *ts,
- {
- int ret;
-
-- ret = i2c_smbus_write_byte_data(ts->bridge_i2c, reg, val);
-+ ret = i2c_smbus_write_byte_data(ts->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,
-@@ -275,13 +247,7 @@ static int rpi_touchscreen_write(struct rpi_touchscreen *ts, u16 reg, u32 val)
- 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
-+ mipi_dsi_generic_write(ts->dsi, msg, sizeof(msg));
-
- return 0;
- }
-@@ -317,8 +283,7 @@ static int rpi_touchscreen_enable(struct drm_panel *panel)
-
- rpi_touchscreen_write(ts, DSI_LANEENABLE,
- DSI_LANEENABLE_CLOCK |
-- DSI_LANEENABLE_D0 |
-- (ts->dsi->lanes > 1 ? DSI_LANEENABLE_D1 : 0));
-+ DSI_LANEENABLE_D0);
- rpi_touchscreen_write(ts, PPI_D0S_CLRSIPOCOUNT, 0x05);
- rpi_touchscreen_write(ts, PPI_D1S_CLRSIPOCOUNT, 0x05);
- rpi_touchscreen_write(ts, PPI_D0S_ATMR, 0x00);
-@@ -352,6 +317,7 @@ 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;
-+ static const u32 bus_format = MEDIA_BUS_FMT_RGB888_1X24;
-
- for (i = 0; i < ARRAY_SIZE(rpi_touchscreen_modes); i++) {
- const struct drm_display_mode *m = &rpi_touchscreen_modes[i];
-@@ -378,6 +344,8 @@ static int rpi_touchscreen_get_modes(struct drm_panel *panel)
- connector->display_info.bpc = 8;
- connector->display_info.width_mm = 154;
- connector->display_info.height_mm = 86;
-+ drm_display_info_set_bus_formats(&connector->display_info,
-+ &bus_format, 1);
-
- return num;
- }
-@@ -390,51 +358,27 @@ static const struct drm_panel_funcs rpi_touchscreen_funcs = {
- .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);
--
-- if (!client)
-- return ERR_PTR(-EPROBE_DEFER);
--
-- return client;
--}
--
--static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)
-+static int rpi_touchscreen_probe(struct i2c_client *i2c,
-+ const struct i2c_device_id *id)
- {
-- struct device *dev = &dsi->dev;
-+ struct device *dev = &i2c->dev;
- struct rpi_touchscreen *ts;
-+ struct device_node *endpoint, *dsi_host_node;
-+ struct mipi_dsi_host *host;
- int ret, ver;
-+ struct mipi_dsi_device_info info = {
-+ .type = RPI_DSI_DRIVER_NAME,
-+ .channel = 0,
-+ .node = NULL,
-+ };
-
- ts = devm_kzalloc(dev, sizeof(*ts), GFP_KERNEL);
- if (!ts)
- return -ENOMEM;
-
-- dev_set_drvdata(dev, ts);
-+ i2c_set_clientdata(i2c, 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;
-- }
-+ ts->i2c = i2c;
-
- ver = rpi_touchscreen_i2c_read(ts, REG_ID);
- if (ver < 0) {
-@@ -443,11 +387,8 @@ static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)
- }
-
- switch (ver) {
-- case 0xde:
-- ts->atmel_ver = 1;
-- break;
-- case 0xc3:
-- ts->atmel_ver = 2;
-+ case 0xde: /* ver 1 */
-+ case 0xc3: /* ver 2 */
- break;
- default:
- dev_err(dev, "Unknown Atmel firmware revision: 0x%02x\n", ver);
-@@ -457,65 +398,104 @@ static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)
- /* Turn off at boot, so we can cleanly sequence powering on. */
- rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);
-
-- drm_panel_init(&ts->base);
-+ /* Look up the DSI host. It needs to probe before we do. */
-+ endpoint = of_graph_get_next_endpoint(dev->of_node, NULL);
-+ dsi_host_node = of_graph_get_remote_port_parent(endpoint);
-+ host = of_find_mipi_dsi_host_by_node(dsi_host_node);
-+ of_node_put(dsi_host_node);
-+ if (!host) {
-+ of_node_put(endpoint);
-+ return -EPROBE_DEFER;
-+ }
-+
-+ info.node = of_graph_get_remote_port(endpoint);
-+ of_node_put(endpoint);
-+
-+ ts->dsi = mipi_dsi_device_register_full(host, &info);
-+ if (IS_ERR(ts->dsi)) {
-+ dev_err(dev, "DSI device registration failed: %ld\n",
-+ PTR_ERR(ts->dsi));
-+ return PTR_ERR(ts->dsi);
-+ }
-+
- ts->base.dev = dev;
- ts->base.funcs = &rpi_touchscreen_funcs;
-
-+ /* This appears last, as it's what will unblock the DSI host
-+ * driver's component bind function.
-+ */
- ret = drm_panel_add(&ts->base);
-- if (ret < 0)
-- goto err_release_bridge;
--
-- return mipi_dsi_attach(dsi);
-+ if (ret)
-+ return ret;
-
--err_release_bridge:
-- put_device(&ts->bridge_i2c->dev);
-- return ret;
-+ return 0;
- }
-
--static int rpi_touchscreen_dsi_remove(struct mipi_dsi_device *dsi)
-+static int rpi_touchscreen_remove(struct i2c_client *i2c)
- {
-- struct device *dev = &dsi->dev;
-- struct rpi_touchscreen *ts = dev_get_drvdata(dev);
-- int ret;
-+ struct rpi_touchscreen *ts = i2c_get_clientdata(i2c);
-
-- ret = mipi_dsi_detach(dsi);
-- if (ret < 0) {
-- dev_err(&dsi->dev, "failed to detach from DSI host: %d\n", ret);
-- return ret;
-- }
-+ mipi_dsi_detach(ts->dsi);
-
-- drm_panel_detach(&ts->base);
- drm_panel_remove(&ts->base);
-
-- put_device(&ts->bridge_i2c->dev);
-+ mipi_dsi_device_unregister(ts->dsi);
-+ kfree(ts->dsi);
-
- return 0;
- }
-
--static void rpi_touchscreen_dsi_shutdown(struct mipi_dsi_device *dsi)
-+static int rpi_touchscreen_dsi_probe(struct mipi_dsi_device *dsi)
- {
-- struct device *dev = &dsi->dev;
-- struct rpi_touchscreen *ts = dev_get_drvdata(dev);
-+ int ret;
-
-- rpi_touchscreen_i2c_write(ts, REG_POWERON, 0);
-+ 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;
-+
-+ ret = mipi_dsi_attach(dsi);
-+
-+ if (ret)
-+ dev_err(&dsi->dev, "failed to attach dsi to host: %d\n", ret);
-+
-+ return ret;
- }
-
--static const struct of_device_id rpi_touchscreen_of_match[] = {
-- { .compatible = "raspberrypi,touchscreen" },
-+static struct mipi_dsi_driver rpi_touchscreen_dsi_driver = {
-+ .driver.name = RPI_DSI_DRIVER_NAME,
-+ .probe = rpi_touchscreen_dsi_probe,
-+};
-+
-+static const struct of_device_id rpi_touchscreen_of_ids[] = {
-+ { .compatible = "raspberrypi,7inch-touchscreen-panel" },
- { } /* sentinel */
- };
--MODULE_DEVICE_TABLE(of, rpi_touchscreen_of_match);
-+MODULE_DEVICE_TABLE(of, rpi_touchscreen_of_ids);
-
--static struct mipi_dsi_driver rpi_touchscreen_driver = {
-+static struct i2c_driver rpi_touchscreen_driver = {
- .driver = {
-- .name = "raspberrypi-touchscreen",
-- .of_match_table = rpi_touchscreen_of_match,
-+ .name = "rpi_touchscreen",
-+ .of_match_table = rpi_touchscreen_of_ids,
- },
-- .probe = rpi_touchscreen_dsi_probe,
-- .remove = rpi_touchscreen_dsi_remove,
-- .shutdown = rpi_touchscreen_dsi_shutdown,
-+ .probe = rpi_touchscreen_probe,
-+ .remove = rpi_touchscreen_remove,
- };
--module_mipi_dsi_driver(rpi_touchscreen_driver);
-+
-+static int __init rpi_touchscreen_init(void)
-+{
-+ mipi_dsi_driver_register(&rpi_touchscreen_dsi_driver);
-+ return i2c_add_driver(&rpi_touchscreen_driver);
-+}
-+module_init(rpi_touchscreen_init);
-+
-+static void __exit rpi_touchscreen_exit(void)
-+{
-+ i2c_del_driver(&rpi_touchscreen_driver);
-+ mipi_dsi_driver_unregister(&rpi_touchscreen_dsi_driver);
-+}
-+module_exit(rpi_touchscreen_exit);
-
- MODULE_AUTHOR("Eric Anholt <eric@anholt.net>");
- MODULE_DESCRIPTION("Raspberry Pi 7-inch touchscreen driver");
---
-2.21.0
-