[PATCH 3/3] video: tc358767: add eDP video encoder driver
Philipp Zabel
p.zabel at pengutronix.de
Wed Aug 24 03:40:19 PDT 2016
From: Andrey Gusakov <andrey.gusakov at cogentembedded.com>
This patch adds support for the Toshiba TC358767 eDP bridge,
connected via DPI.
Signed-off-by: Andrey Gusakov <andrey.gusakov at cogentembedded.com>
Signed-off-by: Philipp Zabel <p.zabel at pengutronix.de>
---
drivers/video/Kconfig | 8 +
drivers/video/Makefile | 1 +
drivers/video/tc358767.c | 1313 ++++++++++++++++++++++++++++++++++++++++++++++
3 files changed, 1322 insertions(+)
create mode 100644 drivers/video/tc358767.c
diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
index 7ff67e5..2457bb9 100644
--- a/drivers/video/Kconfig
+++ b/drivers/video/Kconfig
@@ -127,6 +127,14 @@ config DRIVER_VIDEO_MTL017
The MTL017 is a parallel to lvds video encoder chip found on the
Efika MX Smartbook.
+config DRIVER_VIDEO_TC358767
+ bool "TC358767A Display Port encoder"
+ select VIDEO_VPL
+ depends on I2C
+ depends on OFTREE
+ help
+ The TC358767A is a DSI/DPI to eDP video encoder chip
+
config DRIVER_VIDEO_SIMPLE_PANEL
bool "Simple panel support"
select VIDEO_VPL
diff --git a/drivers/video/Makefile b/drivers/video/Makefile
index a64fc5f..1bf2e1f 100644
--- a/drivers/video/Makefile
+++ b/drivers/video/Makefile
@@ -6,6 +6,7 @@ obj-$(CONFIG_DRIVER_VIDEO_BACKLIGHT_PWM) += backlight-pwm.o
obj-$(CONFIG_FRAMEBUFFER_CONSOLE) += fbconsole.o
obj-$(CONFIG_VIDEO_VPL) += vpl.o
obj-$(CONFIG_DRIVER_VIDEO_MTL017) += mtl017.o
+obj-$(CONFIG_DRIVER_VIDEO_TC358767) += tc358767.o
obj-$(CONFIG_DRIVER_VIDEO_SIMPLE_PANEL) += simple-panel.o
obj-$(CONFIG_DRIVER_VIDEO_ATMEL) += atmel_lcdfb.o atmel_lcdfb_core.o
diff --git a/drivers/video/tc358767.c b/drivers/video/tc358767.c
new file mode 100644
index 0000000..f2ea198
--- /dev/null
+++ b/drivers/video/tc358767.c
@@ -0,0 +1,1313 @@
+/*
+ * tc358767 eDP encoder driver
+ *
+ * Copyright (C) 2016 CogentEmbedded Inc
+ * Author: Andrey Gusakov <andrey.gusakov at cogentembedded.com>
+ *
+ * Copyright (C) 2016 Pengutronix, Philipp Zabel <p.zabel at pengutronix.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <common.h>
+#include <init.h>
+#include <driver.h>
+#include <malloc.h>
+#include <errno.h>
+#include <i2c/i2c.h>
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/kernel.h>
+#include <gpio.h>
+#include <of_gpio.h>
+#include <video/media-bus-format.h>
+#include <video/vpl.h>
+#include <asm-generic/div64.h>
+
+#define DP_LINK_BW_SET 0x100
+#define DP_TRAINING_PATTERN_SET 0x102
+
+#define DP_DOWNSPREAD_CTRL 0x107
+#define DP_SPREAD_AMP_0_5 (1 << 4)
+
+#define DP_MAIN_LINK_CHANNEL_CODING_SET 0x108
+#define DP_SET_ANSI_8B10B (1 << 0)
+
+#define DP_LANE0_1_STATUS 0x202
+#define DP_LANE2_3_STATUS 0x202
+#define DP_LANE_CR_DONE (1 << 0)
+#define DP_LANE_CHANNEL_EQ_DONE (1 << 1)
+#define DP_LANE_SYMBOL_LOCKED (1 << 2)
+#define DP_CHANNEL_EQ_BITS (DP_LANE_CR_DONE | \
+ DP_LANE_CHANNEL_EQ_DONE | \
+ DP_LANE_SYMBOL_LOCKED)
+
+#define DP_LAINE_ALIGN_STATUS_UPDATED 0x204
+#define DP_INTERLANE_ALIGN_DONE (1 << 0)
+
+#define DP_LINK_SCRAMBLING_DISABLE 0x20
+#define DP_TRAINING_PATTERN_1 1
+#define DP_TRAINING_PATTERN_2 2
+
+#define DP_EDP_CONFIGURATION_SET 0x10a
+#define DP_ALTERNATE_SCRAMBLER_RESET_ENABLE (1 << 0)
+
+/* Registers */
+
+/* Display Parallel Interface */
+#define DPIPXLFMT 0x0440
+#define VS_POL_ACTIVE_LOW (1 << 10)
+#define HS_POL_ACTIVE_LOW (1 << 9)
+#define DE_POL_ACTIVE_HIGH (0 << 8)
+#define SUB_CFG_TYPE_CONFIG1 (0 << 2) /* LSB aligned */
+#define SUB_CFG_TYPE_CONFIG2 (1 << 2) /* Loosely Packed */
+#define SUB_CFG_TYPE_CONFIG3 (2 << 2) /* LSB aligned 8-bit */
+#define DPI_BPP_RGB888 (0 << 0)
+#define DPI_BPP_RGB666 (1 << 0)
+#define DPI_BPP_RGB565 (2 << 0)
+
+/* Video Path */
+#define VPCTRL0 0x0450
+#define OPXLFMT_RGB666 (0 << 8)
+#define OPXLFMT_RGB888 (1 << 8)
+#define FRMSYNC_DISABLED (0 << 4) /* Video Timing Gen Disabled */
+#define FRMSYNC_ENABLED (1 << 4) /* Video Timing Gen Enabled */
+#define MSF_DISABLED (0 << 0) /* Magic Square FRC disabled */
+#define MSF_ENABLED (1 << 0) /* Magic Square FRC enabled */
+#define HTIM01 0x0454
+#define HTIM02 0x0458
+#define VTIM01 0x045c
+#define VTIM02 0x0460
+#define VFUEN0 0x0464
+#define VFUEN BIT(0) /* Video Frame Timing Upload */
+
+/* System */
+#define TC_IDREG 0x0500
+#define SYSCTRL 0x0510
+#define DP0_AUDSRC_NO_INPUT (0 << 3)
+#define DP0_AUDSRC_I2S_RX (1 << 3)
+#define DP0_VIDSRC_NO_INPUT (0 << 0)
+#define DP0_VIDSRC_DSI_RX (1 << 0)
+#define DP0_VIDSRC_DPI_RX (2 << 0)
+#define DP0_VIDSRC_COLOR_BAR (3 << 0)
+
+/* Control */
+#define DP0CTL 0x0600
+#define VID_MN_GEN BIT(6) /* Auto-generate M/N values */
+#define EF_EN BIT(5) /* Enable Enhanced Framing */
+#define VID_EN BIT(1) /* Video transmission enable */
+#define DP_EN BIT(0) /* Enable DPTX function */
+
+/* Clocks */
+#define DP0_VIDMNGEN0 0x0610
+#define DP0_VIDMNGEN1 0x0614
+#define DP0_VMNGENSTATUS 0x0618
+
+/* Main Channel */
+#define DP0_SECSAMPLE 0x0640
+#define DP0_VIDSYNCDELAY 0x0644
+#define DP0_TOTALVAL 0x0648
+#define DP0_STARTVAL 0x064c
+#define DP0_ACTIVEVAL 0x0650
+#define DP0_SYNCVAL 0x0654
+#define DP0_MISC 0x0658
+#define TU_SIZE_RECOMMENDED (0x3f << 16) /* LSCLK cycles per TU */
+#define BPC_6 (0 << 5)
+#define BPC_8 (1 << 5)
+
+/* AUX channel */
+#define DP0_AUXCFG0 0x0660
+#define DP0_AUXCFG1 0x0664
+#define AUX_RX_FILTER_EN BIT(16)
+
+#define DP0_AUXADDR 0x0668
+#define DP0_AUXWDATA(i) (0x066c + (i) * 4)
+#define DP0_AUXRDATA(i) (0x067c + (i) * 4)
+#define DP0_AUXSTATUS 0x068c
+#define AUX_STATUS_MASK 0xf0
+#define AUX_STATUS_SHIFT 4
+#define AUX_TIMEOUT BIT(1)
+#define AUX_BUSY BIT(0)
+#define DP0_AUXI2CADR 0x0698
+
+/* Link Training */
+#define DP0_SRCCTRL 0x06a0
+#define DP0_SRCCTRL_SCRMBLDIS BIT(13)
+#define DP0_SRCCTRL_EN810B BIT(12)
+#define DP0_SRCCTRL_NOTP (0 << 8)
+#define DP0_SRCCTRL_TP1 (1 << 8)
+#define DP0_SRCCTRL_TP2 (2 << 8)
+#define DP0_SRCCTRL_LANESKEW BIT(7)
+#define DP0_SRCCTRL_SSCG BIT(3)
+#define DP0_SRCCTRL_LANES_1 (0 << 2)
+#define DP0_SRCCTRL_LANES_2 (1 << 2)
+#define DP0_SRCCTRL_BW27 (1 << 1)
+#define DP0_SRCCTRL_BW162 (0 << 1)
+#define DP0_SRCCTRL_AUTOCORRECT BIT(0)
+#define DP0_LTSTAT 0x06d0
+#define LT_LOOPDONE BIT(13)
+#define LT_STATUS_MASK (0x1f << 8)
+#define LT_CHANNEL1_EQ_BITS (DP_CHANNEL_EQ_BITS << 4)
+#define LT_INTERLANE_ALIGN_DONE BIT(3)
+#define LT_CHANNEL0_EQ_BITS (DP_CHANNEL_EQ_BITS)
+#define DP0_SNKLTCHGREQ 0x06d4
+#define DP0_LTLOOPCTRL 0x06d8
+#define DP0_SNKLTCTRL 0x06e4
+
+/* PHY */
+#define DP_PHY_CTRL 0x0800
+#define DP_PHY_RST BIT(28) /* DP PHY Global Soft Reset */
+#define BGREN BIT(25) /* AUX PHY BGR Enable */
+#define PWR_SW_EN BIT(24) /* PHY Power Switch Enable */
+#define PHY_M1_RST BIT(12) /* Reset PHY1 Main Channel */
+#define PHY_RDY BIT(16) /* PHY Main Channels Ready */
+#define PHY_M0_RST BIT(8) /* Reset PHY0 Main Channel */
+#define PHY_A0_EN BIT(1) /* PHY Aux Channel0 Enable */
+#define PHY_M0_EN BIT(0) /* PHY Main Channel0 Enable */
+
+/* PLL */
+#define DP0_PLLCTRL 0x0900
+#define DP1_PLLCTRL 0x0904 /* not defined in DS */
+#define PXL_PLLCTRL 0x0908
+#define PLLUPDATE BIT(2)
+#define PLLBYP BIT(1)
+#define PLLEN BIT(0)
+#define PXL_PLLPARAM 0x0914
+#define IN_SEL_REFCLK (0 << 14)
+#define SYS_PLLPARAM 0x0918
+#define REF_FREQ_38M4 (0 << 8) /* 38.4 MHz */
+#define REF_FREQ_19M2 (1 << 8) /* 19.2 MHz */
+#define REF_FREQ_26M (2 << 8) /* 26 MHz */
+#define REF_FREQ_13M (3 << 8) /* 13 MHz */
+#define SYSCLK_SEL_LSCLK (0 << 4)
+#define LSCLK_DIV_1 (0 << 0)
+#define LSCLK_DIV_2 (1 << 0)
+
+/* Test & Debug */
+#define TSTCTL 0x0a00
+#define PLL_DBG 0x0a04
+
+struct tc_edp_link {
+ u8 rate;
+ u8 rev;
+ u8 lanes;
+ u8 enhanced;
+ u8 assr;
+ int scrambler_dis;
+ int spread;
+ int coding8b10b;
+ u8 swing;
+ u8 preemp;
+};
+
+struct tc_data {
+ struct i2c_client *client;
+ struct device_d *dev;
+ /* DP AUX channel */
+ struct i2c_adapter adapter;
+ struct vpl vpl;
+
+ /* link settings */
+ struct tc_edp_link link;
+
+ /* mode */
+ struct fb_videomode *mode;
+
+ u32 rev;
+ u8 assr;
+
+ char *edid;
+
+ int sd_gpio;
+ int sd_active_high;
+ int reset_gpio;
+ int reset_active_high;
+ struct clk *refclk;
+};
+#define to_tc_i2c_struct(a) container_of(a, struct tc_data, adapter)
+
+static int tc_write_reg(struct tc_data *data, u16 reg, u32 value)
+{
+ int ret;
+ u8 buf[4];
+
+ buf[0] = value & 0xff;
+ buf[1] = (value >> 8) & 0xff;
+ buf[2] = (value >> 16) & 0xff;
+ buf[3] = (value >> 24) & 0xff;
+
+ ret = i2c_write_reg(data->client, reg | I2C_ADDR_16_BIT, buf, 4);
+ if (ret != 4) {
+ dev_err(data->dev, "error writing reg 0x%04x: %d\n",
+ reg, ret);
+ return ret;
+ }
+
+ return 0;
+}
+
+
+static int tc_read_reg(struct tc_data *data, u16 reg, u32 *value)
+{
+ int ret;
+ u8 buf[4];
+
+ ret = i2c_read_reg(data->client, reg | I2C_ADDR_16_BIT, buf, 4);
+ if (ret != 4) {
+ dev_err(data->dev, "error reading reg 0x%04x: %d\n",
+ reg, ret);
+ return ret;
+ }
+
+ *value = buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
+
+ return 0;
+}
+
+/* simple macros to avoid error checks */
+#define tc_write(reg, var) do { \
+ ret = tc_write_reg(tc, reg, var); \
+ if (ret) \
+ goto err; \
+ } while (0)
+#define tc_read(reg, var) do { \
+ ret = tc_read_reg(tc, reg, var); \
+ if (ret) \
+ goto err; \
+ } while (0)
+
+static int tc_aux_get_status(struct tc_data *tc)
+{
+ int ret;
+ u32 value;
+
+ tc_read(DP0_AUXSTATUS, &value);
+ if ((value & 0x01) == 0x00) {
+ switch (value & 0xf0) {
+ case 0x00:
+ /* Ack */
+ return 0;
+ case 0x40:
+ /* Nack */
+ return -EIO;
+ case 0x80:
+ dev_err(tc->dev, "i2c defer\n");
+ return -EAGAIN;
+ }
+ return 0;
+ }
+
+ if (value & 0x02) {
+ dev_err(tc->dev, "i2c access timeout!\n");
+ return -ETIME;
+ }
+ return -EBUSY;
+err:
+ return ret;
+}
+
+static int tc_aux_wait_busy(struct tc_data *tc, unsigned int timeout_ms)
+{
+ int ret;
+ u32 value;
+
+ do {
+ tc_read(DP0_AUXSTATUS, &value);
+ if ((value & AUX_BUSY) == 0x00)
+ return 0;
+ mdelay(1);
+ } while (timeout_ms--);
+
+ return -EBUSY;
+err:
+ return ret;
+}
+
+static int tc_aux_read(struct tc_data *tc, int reg, char *data, int size)
+{
+ int i = 0;
+ int ret;
+ u32 tmp;
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ /* store address */
+ tc_write(DP0_AUXADDR, reg);
+ /* start transfer */
+ tc_write(DP0_AUXCFG0, ((size - 1) << 8) | 0x09);
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ ret = tc_aux_get_status(tc);
+ if (ret)
+ goto err;
+
+ /* read data */
+ while (i < size) {
+ if ((i % 4) == 0)
+ tc_read(DP0_AUXRDATA(i >> 2), &tmp);
+ data[i] = tmp & 0xFF;
+ tmp = tmp >> 8;
+ i++;
+ }
+
+ return 0;
+err:
+ dev_err(tc->dev, "tc_aux_read error: %d\n", ret);
+ return ret;
+}
+
+static int tc_aux_write(struct tc_data *tc, int reg, char *data, int size)
+{
+ int i = 0;
+ int ret;
+ u32 tmp = 0;
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ i = 0;
+ /* store data */
+ while (i < size) {
+ tmp = tmp | (data[i] << (8 * (i & 0x03)));
+ i++;
+ if (((i % 4) == 0) ||
+ (i == size)) {
+ tc_write(DP0_AUXWDATA(i >> 2), tmp);
+ tmp = 0;
+ }
+ }
+ /* store address */
+ tc_write(DP0_AUXADDR, reg);
+ /* start transfer */
+ tc_write(DP0_AUXCFG0, ((size - 1) << 8) | 0x08);
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ ret = tc_aux_get_status(tc);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ dev_err(tc->dev, "tc_aux_write error: %d\n", ret);
+ return ret;
+}
+
+static int tc_aux_i2c_read(struct tc_data *tc, struct i2c_msg *msg)
+{
+ int i = 0;
+ int ret;
+ u32 tmp;
+
+ if (msg->flags & I2C_M_DATA_ONLY)
+ return -EINVAL;
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ /* store address */
+ tc_write(DP0_AUXADDR, msg->addr);
+
+ /* start transfer */
+ tc_write(DP0_AUXCFG0, ((msg->len - 1) << 8) | 0x01);
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ ret = tc_aux_get_status(tc);
+ if (ret)
+ goto err;
+
+ /* read data */
+ while (i < msg->len) {
+ if ((i % 4) == 0)
+ tc_read(DP0_AUXRDATA(i >> 2), &tmp);
+ msg->buf[i] = tmp & 0xFF;
+ tmp = tmp >> 8;
+ i++;
+ }
+
+ return 0;
+err:
+ return ret;
+}
+
+static int tc_aux_i2c_write(struct tc_data *tc, struct i2c_msg *msg)
+{
+ int i = 0;
+ int ret;
+ u32 tmp = 0;
+
+ if (msg->flags & I2C_M_DATA_ONLY)
+ return -EINVAL;
+
+ if (msg->len > 16) {
+ dev_err(tc->dev, "this bus support max 16 bytes per transfer\n");
+ return -EINVAL;
+ }
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ /* store data */
+ while (i < msg->len) {
+ tmp = (tmp << 8) | msg->buf[i];
+ i++;
+ if (((i % 4) == 0) ||
+ (i == msg->len)) {
+ tc_write(DP0_AUXWDATA(i >> 2), tmp);
+ tmp = 0;
+ }
+ }
+ /* store address */
+ tc_write(DP0_AUXADDR, msg->addr);
+ /* start transfer */
+ tc_write(DP0_AUXCFG0, ((msg->len - 1) << 8) | 0x00);
+
+ ret = tc_aux_wait_busy(tc, 100);
+ if (ret)
+ goto err;
+
+ ret = tc_aux_get_status(tc);
+ if (ret)
+ goto err;
+
+ return 0;
+err:
+ return ret;
+}
+
+static int tc_aux_i2c_xfer(struct i2c_adapter *adapter,
+ struct i2c_msg *msgs, int num)
+{
+ struct tc_data *tc = to_tc_i2c_struct(adapter);
+ unsigned int i;
+ int ret;
+
+ /* check */
+ for (i = 0; i < num; i++) {
+ if (msgs[i].len > 16) {
+ dev_err(tc->dev, "this bus support max 16 bytes per transfer\n");
+ return -EINVAL;
+ }
+ }
+
+ /* read/write data */
+ for (i = 0; i < num; i++) {
+ /* write/read data */
+ if (msgs[i].flags & I2C_M_RD)
+ ret = tc_aux_i2c_read(tc, &msgs[i]);
+ else
+ ret = tc_aux_i2c_write(tc, &msgs[i]);
+ if (ret)
+ goto err;
+ }
+
+err:
+ return (ret < 0) ? ret : num;
+}
+
+static const char * const training_pattern1_errors[] = {
+ "No errors",
+ "Aux write error",
+ "Aux read error",
+ "Max voltage reached error",
+ "Loop counter expired error",
+ "res", "res", "res"
+};
+
+static const char * const training_pattern2_errors[] = {
+ "No errors",
+ "Aux write error",
+ "Aux read error",
+ "Clock recovery failed error",
+ "Loop counter expired error",
+ "res", "res", "res"
+};
+
+static u32 tc_srcctrl(struct tc_data *tc)
+{
+ /*
+ * No training pattern, skew lane 1 data by two LSCLK cycles with
+ * respect to lane 0 data, AutoCorrect Mode = 0
+ */
+ u32 reg = DP0_SRCCTRL_NOTP | DP0_SRCCTRL_LANESKEW;
+
+ if (tc->link.scrambler_dis)
+ reg |= DP0_SRCCTRL_SCRMBLDIS; /* Scrambler Disabled */
+ if (tc->link.coding8b10b)
+ /* Enable 8/10B Encoder (TxData[19:16] not used) */
+ reg |= DP0_SRCCTRL_EN810B;
+ if (tc->link.spread)
+ reg |= DP0_SRCCTRL_SSCG; /* Spread Spectrum Enable */
+ if (tc->link.lanes == 2)
+ reg |= DP0_SRCCTRL_LANES_2; /* Two Main Channel Lanes */
+ if (tc->link.rate != 0x06)
+ reg |= DP0_SRCCTRL_BW27; /* 2.7 Gbps link */
+ return reg;
+}
+
+static void tc_wait_pll_lock(struct tc_data *tc)
+{
+ /* Wait for PLL to lock: up to 2.09 ms, depending on refclk */
+ mdelay(100);
+}
+
+static int tc_stream_clock_calc(struct tc_data *tc)
+{
+ int ret;
+ /*
+ * If the Stream clock and Link Symbol clock are
+ * asynchronous with each other, the value of M changes over
+ * time. This way of generating link clock and stream
+ * clock is called Asynchronous Clock mode. The value M
+ * must change while the value N stays constant. The
+ * value of N in this Asynchronous Clock mode must be set
+ * to 2^15 or 32,768.
+ *
+ * LSCLK = 1/10 of high speed link clock
+ *
+ * f_STRMCLK = M/N * f_LSCLK
+ * M/N = f_STRMCLK / f_LSCLK
+ *
+ */
+ tc_write(DP0_VIDMNGEN1, 32768);
+
+ return 0;
+err:
+ return ret;
+}
+
+static int tc_aux_link_setup(struct tc_data *tc)
+{
+ unsigned long rate;
+ u32 value;
+ int ret;
+ int timeout;
+
+ rate = clk_get_rate(tc->refclk);
+ switch (rate) {
+ case 38400000:
+ value = REF_FREQ_38M4;
+ break;
+ case 26000000:
+ value = REF_FREQ_26M;
+ break;
+ case 19200000:
+ value = REF_FREQ_19M2;
+ break;
+ case 13000000:
+ value = REF_FREQ_13M;
+ break;
+ default:
+ dev_err(tc->dev, "Invalid refclk rate: %lu Hz\n", rate);
+ return -EINVAL;
+ }
+
+ /* Setup DP-PHY / PLL */
+ value |= SYSCLK_SEL_LSCLK | LSCLK_DIV_2;
+ tc_write(SYS_PLLPARAM, value);
+
+ tc_write(DP_PHY_CTRL, BGREN | PWR_SW_EN | BIT(2) | PHY_A0_EN);
+
+ /*
+ * Initially PLLs are in bypass. Force PLL parameter update,
+ * disable PLL bypass, enable PLL
+ */
+ tc_write(DP0_PLLCTRL, PLLUPDATE | PLLEN);
+ tc_wait_pll_lock(tc);
+
+ tc_write(DP1_PLLCTRL, PLLUPDATE | PLLEN);
+ tc_wait_pll_lock(tc);
+
+ timeout = 1000;
+ do {
+ tc_read(DP_PHY_CTRL, &value);
+ udelay(1);
+ } while ((!(value & (1 << 16))) && (--timeout));
+
+ if (timeout == 0) {
+ dev_err(tc->dev, "Timeout waiting for PHY to become ready");
+ return -ETIMEDOUT;
+ }
+
+ /* Setup AUX link */
+ tc_write(DP0_AUXCFG1, AUX_RX_FILTER_EN |
+ (0x06 << 8) | /* Aux Bit Period Calculator Threshold */
+ (0x3f << 0)); /* Aux Response Timeout Timer */
+
+ return 0;
+err:
+ dev_err(tc->dev, "tc_aux_link_setup failed: %d\n", ret);
+ return ret;
+}
+
+static int tc_get_display_props(struct tc_data *tc)
+{
+ int ret;
+ /* temp buffer */
+ u8 tmp[8];
+
+ /* Read DP Rx Link Capability */
+ ret = tc_aux_read(tc, 0x000, tmp, 8);
+ if (ret)
+ goto err_dpcd_read;
+ /* check rev 1.0 or 1.1 */
+ if ((tmp[1] != 0x06) && (tmp[1] != 0x0a))
+ goto err_dpcd_inval;
+
+ tc->assr = !(tc->rev & 0x02);
+ tc->link.rev = tmp[0];
+ tc->link.rate = tmp[1];
+ tc->link.lanes = tmp[2] & 0x0f;
+ tc->link.enhanced = !!(tmp[2] & 0x80);
+ tc->link.spread = tmp[3] & 0x01;
+ tc->link.coding8b10b = tmp[6] & 0x01;
+ tc->link.scrambler_dis = 0;
+ /* read assr */
+ ret = tc_aux_read(tc, DP_EDP_CONFIGURATION_SET, tmp, 1);
+ if (ret)
+ goto err_dpcd_read;
+ tc->link.assr = tmp[0] & DP_ALTERNATE_SCRAMBLER_RESET_ENABLE;
+
+ dev_dbg(tc->dev, "DPCD rev: %d.%d, rate: %s, lanes: %d, framing: %s\n",
+ tc->link.rev >> 4,
+ tc->link.rev & 0x0f,
+ (tc->link.rate == 0x06) ? "1.62Gbps" : "2.7Gbps",
+ tc->link.lanes,
+ tc->link.enhanced ? "enhanced" : "non-enhanced");
+ dev_dbg(tc->dev, "ANSI 8B/10B: %d\n", tc->link.coding8b10b);
+ dev_dbg(tc->dev, "Display ASSR: %d, TC358767 ASSR: %d\n",
+ tc->link.assr, tc->assr);
+
+ return 0;
+
+err_dpcd_read:
+ dev_err(tc->dev, "failed to read DPCD: %d\n", ret);
+ return ret;
+err_dpcd_inval:
+ dev_err(tc->dev, "invalid DPCD\n");
+ return -EINVAL;
+}
+
+static int tc_set_video_mode(struct tc_data *tc, struct fb_videomode *mode)
+{
+ int ret;
+ int htotal;
+ int vtotal;
+ int vid_sync_dly;
+ int max_tu_symbol;
+
+ htotal = mode->hsync_len + mode->left_margin + mode->xres +
+ mode->right_margin;
+ vtotal = mode->vsync_len + mode->upper_margin + mode->yres +
+ mode->lower_margin;
+
+ dev_dbg(tc->dev, "set mode %dx%d\n", mode->xres, mode->yres);
+ dev_dbg(tc->dev, "H margin %d,%d sync %d\n",
+ mode->left_margin, mode->right_margin, mode->hsync_len);
+ dev_dbg(tc->dev, "V margin %d,%d sync %d\n",
+ mode->upper_margin, mode->lower_margin, mode->vsync_len);
+ dev_dbg(tc->dev, "total: %dx%d\n", htotal, vtotal);
+
+
+ /* LCD Ctl Frame Size */
+ tc_write(VPCTRL0, (0x40 << 20) /* VSDELAY */ |
+ OPXLFMT_RGB888 | FRMSYNC_DISABLED | MSF_DISABLED);
+ tc_write(HTIM01, (mode->left_margin << 16) | /* H back porch */
+ (mode->hsync_len << 0)); /* Hsync */
+ tc_write(HTIM02, (mode->right_margin << 16) | /* H front porch */
+ (mode->xres << 0)); /* width */
+ tc_write(VTIM01, (mode->upper_margin << 16) | /* V back porch */
+ (mode->vsync_len << 0)); /* Vsync */
+ tc_write(VTIM02, (mode->lower_margin << 16) | /* V front porch */
+ (mode->yres << 0)); /* height */
+ tc_write(VFUEN0, VFUEN); /* update settings */
+
+ /* Test pattern settings */
+ tc_write(TSTCTL,
+ (120 << 24) | /* Red Color component value */
+ (20 << 16) | /* Green Color component value */
+ (99 << 8) | /* Blue Color component value */
+ (1 << 4) | /* Enable I2C Filter */
+ (2 << 0) | /* Color bar Mode */
+ 0);
+
+ /* DP Main Stream Attributes */
+ vid_sync_dly = mode->hsync_len + mode->left_margin + mode->xres;
+ tc_write(DP0_VIDSYNCDELAY,
+ (0x003e << 16) | /* thresh_dly */
+ (vid_sync_dly << 0));
+
+ tc_write(DP0_TOTALVAL, (vtotal << 16) | (htotal));
+
+ tc_write(DP0_STARTVAL,
+ ((mode->upper_margin + mode->vsync_len) << 16) |
+ ((mode->left_margin + mode->hsync_len) << 0));
+
+ tc_write(DP0_ACTIVEVAL, (mode->yres << 16) | (mode->xres));
+
+ tc_write(DP0_SYNCVAL, (mode->vsync_len << 16) | (mode->hsync_len << 0));
+
+ tc_write(DPIPXLFMT, VS_POL_ACTIVE_LOW | HS_POL_ACTIVE_LOW |
+ DE_POL_ACTIVE_HIGH | SUB_CFG_TYPE_CONFIG1 | DPI_BPP_RGB888);
+
+ /*
+ * Recommended maximum number of symbols transferred in a transfer unit:
+ * DIV_ROUND_UP((input active video bandwidth in bytes) * tu_size,
+ * (output active video bandwidth in bytes))
+ * Must be less than tu_size.
+ */
+ max_tu_symbol = TU_SIZE_RECOMMENDED - 1;
+ tc_write(DP0_MISC, (max_tu_symbol << 23) | TU_SIZE_RECOMMENDED | BPC_8);
+
+ return 0;
+err:
+ return ret;
+}
+
+static int tc_link_training(struct tc_data *tc, int pattern)
+{
+ const char * const *errors;
+ u32 srcctrl = tc_srcctrl(tc) | DP0_SRCCTRL_SCRMBLDIS |
+ DP0_SRCCTRL_AUTOCORRECT;
+ int timeout;
+ int retry;
+ u32 value;
+ int ret;
+
+ if (pattern == DP_TRAINING_PATTERN_1) {
+ srcctrl |= DP0_SRCCTRL_TP1;
+ errors = training_pattern1_errors;
+ } else {
+ srcctrl |= DP0_SRCCTRL_TP2;
+ errors = training_pattern2_errors;
+ }
+
+ /* Set DPCD 0x102 for Training Part 1 or 2 */
+ tc_write(DP0_SNKLTCTRL, DP_LINK_SCRAMBLING_DISABLE | pattern);
+
+ tc_write(DP0_LTLOOPCTRL,
+ (0x0f << 28) | /* Defer Iteration Count */
+ (0x0f << 24) | /* Loop Iteration Count */
+ (0x0d << 0)); /* Loop Timer Delay */
+
+ retry = 5;
+ do {
+ /* Set DP0 Training Pattern */
+ tc_write(DP0_SRCCTRL, srcctrl);
+
+ /* Enable DP0 to start Link Training */
+ tc_write(DP0CTL, DP_EN);
+
+ /* wait */
+ timeout = 1000;
+ do {
+ tc_read(DP0_LTSTAT, &value);
+ udelay(1);
+ } while ((!(value & LT_LOOPDONE)) && (--timeout));
+ if (timeout == 0) {
+ dev_err(tc->dev, "Link training timeout!\n");
+ } else {
+ int pattern = (value >> 11) & 0x3;
+ int error = (value >> 8) & 0x7;
+
+ dev_dbg(tc->dev,
+ "Link training phase %d done after %d uS: %s\n",
+ pattern, 1000 - timeout, errors[error]);
+ if (pattern == DP_TRAINING_PATTERN_1 && error == 0)
+ break;
+ if (pattern == DP_TRAINING_PATTERN_2) {
+ value &= LT_CHANNEL1_EQ_BITS |
+ LT_INTERLANE_ALIGN_DONE |
+ LT_CHANNEL0_EQ_BITS;
+ /* in case of two lanes */
+ if ((tc->link.lanes == 2) &&
+ (value == (LT_CHANNEL1_EQ_BITS |
+ LT_INTERLANE_ALIGN_DONE |
+ LT_CHANNEL0_EQ_BITS)))
+ break;
+ /* in case of one line */
+ if ((tc->link.lanes == 1) &&
+ (value == (LT_INTERLANE_ALIGN_DONE |
+ LT_CHANNEL0_EQ_BITS)))
+ break;
+ }
+ }
+ /* restart */
+ tc_write(DP0CTL, 0);
+ udelay(10);
+ } while (--retry);
+ if (retry == 0) {
+ dev_err(tc->dev, "Failed to finish training phase %d\n",
+ pattern);
+ }
+
+ return 0;
+err:
+ return ret;
+}
+
+static int tc_main_link_setup(struct tc_data *tc)
+{
+ struct device_d *dev = tc->dev;
+ unsigned int rate;
+ u32 dp_phy_ctrl;
+ int timeout;
+ bool aligned;
+ bool ready;
+ u32 value;
+ int ret;
+ u8 tmp[8];
+
+ /* display mode should be set at this point */
+ if (!tc->mode)
+ return -EINVAL;
+
+ /* from excel file - DP0_SrcCtrl */
+ tc_write(DP0_SRCCTRL, DP0_SRCCTRL_SCRMBLDIS | DP0_SRCCTRL_EN810B |
+ DP0_SRCCTRL_LANESKEW | DP0_SRCCTRL_LANES_2 |
+ DP0_SRCCTRL_BW27 | DP0_SRCCTRL_AUTOCORRECT);
+ /* from excel file - DP1_SrcCtrl */
+ tc_write(0x07a0, 0x00003083);
+
+ rate = clk_get_rate(tc->refclk);
+ switch (rate) {
+ case 38400000:
+ value = REF_FREQ_38M4;
+ break;
+ case 26000000:
+ value = REF_FREQ_26M;
+ break;
+ case 19200000:
+ value = REF_FREQ_19M2;
+ break;
+ case 13000000:
+ value = REF_FREQ_13M;
+ break;
+ default:
+ return -EINVAL;
+ }
+ value |= SYSCLK_SEL_LSCLK | LSCLK_DIV_2;
+ tc_write(SYS_PLLPARAM, value);
+ /* Setup Main Link */
+ dp_phy_ctrl = BGREN | PWR_SW_EN | BIT(2) | PHY_A0_EN | PHY_M0_EN;
+ tc_write(DP_PHY_CTRL, dp_phy_ctrl);
+ mdelay(100);
+
+ /* PLL setup */
+ tc_write(DP0_PLLCTRL, PLLUPDATE | PLLEN);
+ tc_wait_pll_lock(tc);
+
+ tc_write(DP1_PLLCTRL, PLLUPDATE | PLLEN);
+ tc_wait_pll_lock(tc);
+
+ /* Reset/Enable Main Links */
+ dp_phy_ctrl |= DP_PHY_RST | PHY_M1_RST | PHY_M0_RST;
+ tc_write(DP_PHY_CTRL, dp_phy_ctrl);
+ udelay(100);
+ dp_phy_ctrl &= ~(DP_PHY_RST | PHY_M1_RST | PHY_M0_RST);
+ tc_write(DP_PHY_CTRL, dp_phy_ctrl);
+
+ timeout = 1000;
+ do {
+ tc_read(DP_PHY_CTRL, &value);
+ udelay(1);
+ } while ((!(value & PHY_RDY)) && (--timeout));
+
+ if (timeout == 0) {
+ dev_err(dev, "timeout waiting for phy become ready");
+ return -ETIMEDOUT;
+ }
+
+ /* Set misc: 8 bits per color */
+ tc_read(DP0_MISC, &value);
+ value |= BPC_8;
+ tc_write(DP0_MISC, value);
+
+ /*
+ * ASSR mode
+ * on TC358767 side ASSR configured through strap pin
+ * seems there is no way to change this setting from SW
+ *
+ * check is tc configured for same mode
+ */
+ if (tc->assr != tc->link.assr) {
+ dev_dbg(dev, "Trying to set display to ASSR: %d\n",
+ tc->assr);
+ /* try to set ASSR on display side */
+ tmp[0] = tc->assr;
+ ret = tc_aux_write(tc, DP_EDP_CONFIGURATION_SET, tmp, 1);
+ if (ret)
+ goto err_dpcd_read;
+ /* read back */
+ ret = tc_aux_read(tc, DP_EDP_CONFIGURATION_SET, tmp, 1);
+ if (ret)
+ goto err_dpcd_read;
+
+ if (tmp[0] != tc->assr) {
+ dev_warn(dev, "Failed to switch display ASSR to %d, falling back to unscrambled mode\n",
+ tc->assr);
+ /* trying with disabled scrambler */
+ tc->link.scrambler_dis = 1;
+ }
+ }
+
+ /* Setup Link & DPRx Config for Training */
+ /* LINK_BW_SET */
+ tmp[0] = tc->link.rate;
+ /* LANE_COUNT_SET */
+ tmp[1] = tc->link.lanes;
+ if (tc->link.enhanced)
+ tmp[1] |= (1 << 7);
+ ret = tc_aux_write(tc, DP_LINK_BW_SET, tmp, 2);
+ if (ret)
+ goto err_dpcd_write;
+
+ /* DOWNSPREAD_CTRL */
+ tmp[0] = tc->link.spread ? DP_SPREAD_AMP_0_5 : 0x00;
+ /* MAIN_LINK_CHANNEL_CODING_SET */
+ tmp[1] = tc->link.coding8b10b ? DP_SET_ANSI_8B10B : 0x00;
+ ret = tc_aux_write(tc, DP_DOWNSPREAD_CTRL, tmp, 2);
+ if (ret)
+ goto err_dpcd_write;
+
+ ret = tc_link_training(tc, DP_TRAINING_PATTERN_1);
+ if (ret)
+ goto err;
+
+ ret = tc_link_training(tc, DP_TRAINING_PATTERN_2);
+ if (ret)
+ goto err;
+
+ /* Clear DPCD 0x102 */
+ /* Note: Can Not use DP0_SNKLTCTRL (0x06E4) short cut */
+ tmp[0] = tc->link.scrambler_dis ? DP_LINK_SCRAMBLING_DISABLE : 0x00;
+ ret = tc_aux_write(tc, DP_TRAINING_PATTERN_SET, tmp, 1);
+ if (ret)
+ goto err_dpcd_write;
+
+ /* Clear Training Pattern, set AutoCorrect Mode = 1 */
+ tc_write(DP0_SRCCTRL, tc_srcctrl(tc) | DP0_SRCCTRL_AUTOCORRECT);
+
+ /* Wait */
+ timeout = 100;
+ do {
+ udelay(1);
+ /* Read DPCD 0x200-0x206 */
+ ret = tc_aux_read(tc, 0x200, tmp, 7);
+ if (ret)
+ goto err_dpcd_read;
+ ready = (tmp[2] == ((DP_CHANNEL_EQ_BITS << 4) | /* Lane1 */
+ DP_CHANNEL_EQ_BITS)); /* Lane0 */
+ aligned = tmp[4] & DP_INTERLANE_ALIGN_DONE;
+ } while ((--timeout) && !(ready && aligned));
+
+ if (timeout == 0) {
+ dev_info(dev, "0x0200 SINK_COUNT: 0x%02x\n", tmp[0]);
+ dev_info(dev, "0x0201 DEVICE_SERVICE_IRQ_VECTOR: 0x%02x\n",
+ tmp[1]);
+ dev_info(dev, "0x0202 LANE0_1_STATUS: 0x%02x\n", tmp[2]);
+ dev_info(dev, "0x0204 LANE_ALIGN_STATUS_UPDATED: 0x%02x\n",
+ tmp[4]);
+ dev_info(dev, "0x0205 SINK_STATUS: 0x%02x\n", tmp[5]);
+ dev_info(dev, "0x0206 ADJUST_REQUEST_LANE0_1: 0x%02x\n",
+ tmp[6]);
+
+ if (!ready)
+ dev_err(dev, "Lane0/1 not ready\n");
+ if (!aligned)
+ dev_err(dev, "Lane0/1 not aligned\n");
+ return -EAGAIN;
+ }
+
+ ret = tc_set_video_mode(tc, tc->mode);
+ if (ret)
+ goto err;
+
+ /* Set M/N */
+ ret = tc_stream_clock_calc(tc);
+ if (ret)
+ goto err;
+
+ return 0;
+err_dpcd_read:
+ dev_err(tc->dev, "Failed to read DPCD: %d\n", ret);
+ return ret;
+err_dpcd_write:
+ dev_err(tc->dev, "Failed to write DPCD: %d\n", ret);
+err:
+ return ret;
+}
+
+static int tc_main_link_stream(struct tc_data *tc, int state)
+{
+ int ret;
+ u32 value;
+
+ dev_dbg(tc->dev, "stream: %d\n", state);
+
+ if (state) {
+ value = VID_MN_GEN | DP_EN;
+ if (tc->link.enhanced)
+ value |= EF_EN;
+ tc_write(DP0CTL, value);
+ /*
+ * VID_EN assertion should be delayed by at least N * LSCLK
+ * cycles from the time VID_MN_GEN is enabled in order to
+ * generate stable values for VID_M. LSCLK is 270 MHz or
+ * 162 MHz, VID_N is set to 32768 in tc_stream_clock_calc(),
+ * so a delay of at least 203 us should suffice.
+ */
+ mdelay(1);
+ value |= VID_EN;
+ tc_write(DP0CTL, value);
+ /* Set input interface, currently DPI only */
+ value = DP0_AUDSRC_NO_INPUT | DP0_VIDSRC_DPI_RX;
+ tc_write(SYSCTRL, value);
+ } else {
+ tc_write(DP0CTL, 0);
+ }
+
+ return 0;
+err:
+ return ret;
+}
+
+#define DDC_BLOCK_READ 5
+#define DDC_SEGMENT_ADDR 0x30
+#define DDC_ADDR 0x50
+#define EDID_LENGTH 0x80
+
+static int tc_read_edid(struct tc_data *tc)
+{
+ int i = 0;
+ int ret;
+ int block;
+ unsigned char start = 0;
+ unsigned char segment = 0;
+
+ struct i2c_msg msgs[] = {
+ {
+ .addr = DDC_SEGMENT_ADDR,
+ .flags = 0,
+ .len = 1,
+ .buf = &segment,
+ }, {
+ .addr = DDC_ADDR,
+ .flags = 0,
+ .len = 1,
+ .buf = &start,
+ }, {
+ .addr = DDC_ADDR,
+ .flags = I2C_M_RD,
+ }
+ };
+ tc->edid = xmalloc(EDID_LENGTH);
+
+ do {
+ block = min(DDC_BLOCK_READ, EDID_LENGTH - i);
+
+ msgs[2].buf = tc->edid + i;
+ msgs[2].len = block;
+
+ ret = i2c_transfer(&tc->adapter, msgs, 3);
+ if (ret < 0)
+ goto err;
+
+ i += DDC_BLOCK_READ;
+ start = i;
+ } while (i < EDID_LENGTH);
+
+#ifdef DEBUG
+ printk(KERN_DEBUG "eDP display EDID:\n");
+ print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 1, tc->edid,
+ EDID_LENGTH, true);
+#endif
+
+ return 0;
+err:
+ free(tc->edid);
+ tc->edid = NULL;
+ dev_err(tc->dev, "tc_read_edid failed: %d\n", ret);
+ return ret;
+}
+
+static int tc_get_videomodes(struct tc_data *tc, struct display_timings *timings)
+{
+ int ret;
+
+ /* edid_read_i2c does not work due to limitation of eDP i2c */
+ if (!tc->edid) {
+ ret = tc_read_edid(tc);
+ if (ret) {
+ dev_err(tc->dev, "EDID read error: %d\n", ret);
+ return ret;
+ }
+ }
+
+ ret = edid_to_display_timings(timings, tc->edid);
+ if (ret < 0) {
+ dev_err(tc->dev, "Failed to parse EDID: %d\n", ret);
+ return ret;
+ }
+
+ /* hsync, vsync active low */
+ timings->modes->sync &= ~(FB_SYNC_HOR_HIGH_ACT |
+ FB_SYNC_VERT_HIGH_ACT);
+
+ return ret;
+}
+
+static int tc_ioctl(struct vpl *vpl, unsigned int port,
+ unsigned int cmd, void *ptr)
+{
+ struct tc_data *tc = container_of(vpl, struct tc_data, vpl);
+ u32 *bus_format;
+ int ret = 0;
+
+ switch (cmd) {
+ case VPL_PREPARE:
+ tc->mode = ptr;
+ break;
+ case VPL_ENABLE:
+ ret = tc_main_link_setup(tc);
+ if (ret < 0)
+ break;
+
+ ret = tc_main_link_stream(tc, 1);
+ break;
+ case VPL_DISABLE:
+ ret = tc_main_link_stream(tc, 0);
+ break;
+ case VPL_GET_VIDEOMODES:
+ ret = tc_get_videomodes(tc, ptr);
+ break;
+ case VPL_GET_BUS_FORMAT:
+ bus_format = ptr;
+ *bus_format = MEDIA_BUS_FMT_RGB888_1X24;
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static int tc_probe(struct device_d *dev)
+{
+ struct i2c_client *client = to_i2c_client(dev);
+ struct tc_data *tc;
+ enum of_gpio_flags flags;
+ int ret;
+
+ tc = xzalloc(sizeof(struct tc_data));
+ if (!tc)
+ return -ENOMEM;
+
+ tc->client = client;
+ tc->dev = dev;
+
+ /* Shut down GPIO is optional */
+ tc->sd_gpio = of_get_named_gpio_flags(dev->device_node,
+ "shutdown-gpios", 0, &flags);
+ if (gpio_is_valid(tc->sd_gpio)) {
+ if (!(flags & OF_GPIO_ACTIVE_LOW))
+ tc->sd_active_high = 1;
+ }
+
+ /* Reset GPIO is optional */
+ tc->reset_gpio = of_get_named_gpio_flags(dev->device_node,
+ "reset-gpios", 0, &flags);
+ if (gpio_is_valid(tc->reset_gpio)) {
+ if (!(flags & OF_GPIO_ACTIVE_LOW))
+ tc->reset_active_high = 1;
+ }
+
+ if (gpio_is_valid(tc->sd_gpio)) {
+ ret = gpio_request(tc->sd_gpio, "tc358767");
+ if (ret) {
+ dev_err(tc->dev, "SD (%d) can not be requested\n", tc->sd_gpio);
+ return ret;
+ }
+ gpio_direction_output(tc->sd_gpio, 0);
+ }
+
+ tc->refclk = of_clk_get_by_name(dev->device_node, "ref");
+ if (IS_ERR(tc->refclk)) {
+ ret = PTR_ERR(tc->refclk);
+ dev_err(dev, "Failed to get refclk: %d\n", ret);
+ goto err;
+ }
+
+ ret = tc_read_reg(tc, TC_IDREG, &tc->rev);
+ if (ret) {
+ dev_err(tc->dev, "can not read device ID\n");
+ goto err;
+ }
+
+ if ((tc->rev != 0x6601) && (tc->rev != 0x6603)) {
+ dev_err(tc->dev, "invalid device ID: 0x%08x\n", tc->rev);
+ ret = -EINVAL;
+ goto err;
+ }
+
+ ret = tc_aux_link_setup(tc);
+ if (ret)
+ goto err;
+
+ /* Register DP AUX channel */
+ tc->adapter.master_xfer = tc_aux_i2c_xfer;
+ tc->adapter.nr = -1; /* any free */
+ tc->adapter.dev.parent = dev;
+ tc->adapter.dev.device_node = dev->device_node;
+ /* Add I2C adapter */
+ ret = i2c_add_numbered_adapter(&tc->adapter);
+ if (ret < 0) {
+ dev_err(tc->dev, "registration failed\n");
+ goto err;
+ }
+
+ ret = tc_get_display_props(tc);
+ if (ret)
+ goto err;
+
+ /* add vlp */
+ tc->vpl.node = dev->device_node;
+ tc->vpl.ioctl = tc_ioctl;
+ return vpl_register(&tc->vpl);
+
+err:
+ free(tc);
+ return ret;
+}
+
+static struct driver_d tc_driver = {
+ .name = "tc358767",
+ .probe = tc_probe,
+};
+
+static int tc_init(void)
+{
+ return i2c_driver_register(&tc_driver);
+}
+device_initcall(tc_init);
--
2.8.1
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