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linux/drivers/gpu/drm/gma500/tc35876x-dsi-lvds.c

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/*
* Copyright © 2011 Intel Corporation
*
* 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, sublicense,
* 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 NONINFRINGEMENT. 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.
*
*/
#include <linux/delay.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <asm/intel_scu_ipc.h>
#include "mdfld_dsi_dpi.h"
#include "mdfld_dsi_pkg_sender.h"
#include "mdfld_output.h"
#include "tc35876x-dsi-lvds.h"
static struct i2c_client *tc35876x_client;
static struct i2c_client *cmi_lcd_i2c_client;
/* Panel GPIOs */
static struct gpio_desc *bridge_reset;
static struct gpio_desc *bridge_bl_enable;
static struct gpio_desc *backlight_voltage;
#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end))
#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end))
/* DSI D-PHY Layer Registers */
#define D0W_DPHYCONTTX 0x0004
#define CLW_DPHYCONTRX 0x0020
#define D0W_DPHYCONTRX 0x0024
#define D1W_DPHYCONTRX 0x0028
#define D2W_DPHYCONTRX 0x002C
#define D3W_DPHYCONTRX 0x0030
#define COM_DPHYCONTRX 0x0038
#define CLW_CNTRL 0x0040
#define D0W_CNTRL 0x0044
#define D1W_CNTRL 0x0048
#define D2W_CNTRL 0x004C
#define D3W_CNTRL 0x0050
#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_D2S_ATMR 0x014C
#define PPI_D3S_ATMR 0x0150
#define PPI_D0S_CLRSIPOCOUNT 0x0164
#define PPI_D1S_CLRSIPOCOUNT 0x0168
#define PPI_D2S_CLRSIPOCOUNT 0x016C
#define PPI_D3S_CLRSIPOCOUNT 0x0170
#define CLS_PRE 0x0180
#define D0S_PRE 0x0184
#define D1S_PRE 0x0188
#define D2S_PRE 0x018C
#define D3S_PRE 0x0190
#define CLS_PREP 0x01A0
#define D0S_PREP 0x01A4
#define D1S_PREP 0x01A8
#define D2S_PREP 0x01AC
#define D3S_PREP 0x01B0
#define CLS_ZERO 0x01C0
#define D0S_ZERO 0x01C4
#define D1S_ZERO 0x01C8
#define D2S_ZERO 0x01CC
#define D3S_ZERO 0x01D0
#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_LANESTATUS0 0x0214
#define DSI_LANESTATUS1 0x0218
#define DSI_INTSTATUS 0x0220
#define DSI_INTMASK 0x0224
#define DSI_INTCLR 0x0228
#define DSI_LPTXTO 0x0230
/* DSI General Registers */
#define DSIERRCNT 0x0300
/* DSI Application Layer Registers */
#define APLCTRL 0x0400
#define RDPKTLN 0x0404
/* Video Path Registers */
#define VPCTRL 0x0450
#define HTIM1 0x0454
#define HTIM2 0x0458
#define VTIM1 0x045C
#define VTIM2 0x0460
#define VFUEN 0x0464
/* LVDS Registers */
#define LVMX0003 0x0480
#define LVMX0407 0x0484
#define LVMX0811 0x0488
#define LVMX1215 0x048C
#define LVMX1619 0x0490
#define LVMX2023 0x0494
#define LVMX2427 0x0498
#define LVCFG 0x049C
#define LVPHY0 0x04A0
#define LVPHY1 0x04A4
/* System Registers */
#define SYSSTAT 0x0500
#define SYSRST 0x0504
/* GPIO Registers */
/*#define GPIOC 0x0520*/
#define GPIOO 0x0524
#define GPIOI 0x0528
/* I2C Registers */
#define I2CTIMCTRL 0x0540
#define I2CMADDR 0x0544
#define WDATAQ 0x0548
#define RDATAQ 0x054C
/* Chip/Rev Registers */
#define IDREG 0x0580
/* Debug Registers */
#define DEBUG00 0x05A0
#define DEBUG01 0x05A4
/* Panel CABC registers */
#define PANEL_PWM_CONTROL 0x90
#define PANEL_FREQ_DIVIDER_HI 0x91
#define PANEL_FREQ_DIVIDER_LO 0x92
#define PANEL_DUTY_CONTROL 0x93
#define PANEL_MODIFY_RGB 0x94
#define PANEL_FRAMERATE_CONTROL 0x96
#define PANEL_PWM_MIN 0x97
#define PANEL_PWM_REF 0x98
#define PANEL_PWM_MAX 0x99
#define PANEL_ALLOW_DISTORT 0x9A
#define PANEL_BYPASS_PWMI 0x9B
/* Panel color management registers */
#define PANEL_CM_ENABLE 0x700
#define PANEL_CM_HUE 0x701
#define PANEL_CM_SATURATION 0x702
#define PANEL_CM_INTENSITY 0x703
#define PANEL_CM_BRIGHTNESS 0x704
#define PANEL_CM_CE_ENABLE 0x705
#define PANEL_CM_PEAK_EN 0x710
#define PANEL_CM_GAIN 0x711
#define PANEL_CM_HUETABLE_START 0x730
#define PANEL_CM_HUETABLE_END 0x747 /* inclusive */
/* Input muxing for registers LVMX0003...LVMX2427 */
enum {
INPUT_R0, /* 0 */
INPUT_R1,
INPUT_R2,
INPUT_R3,
INPUT_R4,
INPUT_R5,
INPUT_R6,
INPUT_R7,
INPUT_G0, /* 8 */
INPUT_G1,
INPUT_G2,
INPUT_G3,
INPUT_G4,
INPUT_G5,
INPUT_G6,
INPUT_G7,
INPUT_B0, /* 16 */
INPUT_B1,
INPUT_B2,
INPUT_B3,
INPUT_B4,
INPUT_B5,
INPUT_B6,
INPUT_B7,
INPUT_HSYNC, /* 24 */
INPUT_VSYNC,
INPUT_DE,
LOGIC_0,
/* 28...31 undefined */
};
#define INPUT_MUX(lvmx03, lvmx02, lvmx01, lvmx00) \
(FLD_VAL(lvmx03, 29, 24) | FLD_VAL(lvmx02, 20, 16) | \
FLD_VAL(lvmx01, 12, 8) | FLD_VAL(lvmx00, 4, 0))
/**
* tc35876x_regw - Write DSI-LVDS bridge register using I2C
* @client: struct i2c_client to use
* @reg: register address
* @value: value to write
*
* Returns 0 on success, or a negative error value.
*/
static int tc35876x_regw(struct i2c_client *client, u16 reg, u32 value)
{
int r;
u8 tx_data[] = {
/* NOTE: Register address big-endian, data little-endian. */
(reg >> 8) & 0xff,
reg & 0xff,
value & 0xff,
(value >> 8) & 0xff,
(value >> 16) & 0xff,
(value >> 24) & 0xff,
};
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.buf = tx_data,
.len = ARRAY_SIZE(tx_data),
},
};
r = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (r < 0) {
dev_err(&client->dev, "%s: reg 0x%04x val 0x%08x error %d\n",
__func__, reg, value, r);
return r;
}
if (r < ARRAY_SIZE(msgs)) {
dev_err(&client->dev, "%s: reg 0x%04x val 0x%08x msgs %d\n",
__func__, reg, value, r);
return -EAGAIN;
}
dev_dbg(&client->dev, "%s: reg 0x%04x val 0x%08x\n",
__func__, reg, value);
return 0;
}
/**
* tc35876x_regr - Read DSI-LVDS bridge register using I2C
* @client: struct i2c_client to use
* @reg: register address
* @value: pointer for storing the value
*
* Returns 0 on success, or a negative error value.
*/
static int tc35876x_regr(struct i2c_client *client, u16 reg, u32 *value)
{
int r;
u8 tx_data[] = {
(reg >> 8) & 0xff,
reg & 0xff,
};
u8 rx_data[4];
struct i2c_msg msgs[] = {
{
.addr = client->addr,
.flags = 0,
.buf = tx_data,
.len = ARRAY_SIZE(tx_data),
},
{
.addr = client->addr,
.flags = I2C_M_RD,
.buf = rx_data,
.len = ARRAY_SIZE(rx_data),
},
};
r = i2c_transfer(client->adapter, msgs, ARRAY_SIZE(msgs));
if (r < 0) {
dev_err(&client->dev, "%s: reg 0x%04x error %d\n", __func__,
reg, r);
return r;
}
if (r < ARRAY_SIZE(msgs)) {
dev_err(&client->dev, "%s: reg 0x%04x msgs %d\n", __func__,
reg, r);
return -EAGAIN;
}
*value = rx_data[0] << 24 | rx_data[1] << 16 |
rx_data[2] << 8 | rx_data[3];
dev_dbg(&client->dev, "%s: reg 0x%04x value 0x%08x\n", __func__,
reg, *value);
return 0;
}
void tc35876x_set_bridge_reset_state(struct drm_device *dev, int state)
{
if (WARN(!tc35876x_client, "%s called before probe", __func__))
return;
dev_dbg(&tc35876x_client->dev, "%s: state %d\n", __func__, state);
if (!bridge_reset)
return;
if (state) {
gpiod_set_value_cansleep(bridge_reset, 0);
mdelay(10);
} else {
/* Pull MIPI Bridge reset pin to Low */
gpiod_set_value_cansleep(bridge_reset, 0);
mdelay(20);
/* Pull MIPI Bridge reset pin to High */
gpiod_set_value_cansleep(bridge_reset, 1);
mdelay(40);
}
}
void tc35876x_configure_lvds_bridge(struct drm_device *dev)
{
struct i2c_client *i2c = tc35876x_client;
u32 ppi_lptxtimecnt;
u32 txtagocnt;
u32 txtasurecnt;
u32 id;
if (WARN(!tc35876x_client, "%s called before probe", __func__))
return;
dev_dbg(&tc35876x_client->dev, "%s\n", __func__);
if (!tc35876x_regr(i2c, IDREG, &id))
dev_info(&tc35876x_client->dev, "tc35876x ID 0x%08x\n", id);
else
dev_err(&tc35876x_client->dev, "Cannot read ID\n");
ppi_lptxtimecnt = 4;
txtagocnt = (5 * ppi_lptxtimecnt - 3) / 4;
txtasurecnt = 3 * ppi_lptxtimecnt / 2;
tc35876x_regw(i2c, PPI_TX_RX_TA, FLD_VAL(txtagocnt, 26, 16) |
FLD_VAL(txtasurecnt, 10, 0));
tc35876x_regw(i2c, PPI_LPTXTIMECNT, FLD_VAL(ppi_lptxtimecnt, 10, 0));
tc35876x_regw(i2c, PPI_D0S_CLRSIPOCOUNT, FLD_VAL(1, 5, 0));
tc35876x_regw(i2c, PPI_D1S_CLRSIPOCOUNT, FLD_VAL(1, 5, 0));
tc35876x_regw(i2c, PPI_D2S_CLRSIPOCOUNT, FLD_VAL(1, 5, 0));
tc35876x_regw(i2c, PPI_D3S_CLRSIPOCOUNT, FLD_VAL(1, 5, 0));
/* Enabling MIPI & PPI lanes, Enable 4 lanes */
tc35876x_regw(i2c, PPI_LANEENABLE,
BIT(4) | BIT(3) | BIT(2) | BIT(1) | BIT(0));
tc35876x_regw(i2c, DSI_LANEENABLE,
BIT(4) | BIT(3) | BIT(2) | BIT(1) | BIT(0));
tc35876x_regw(i2c, PPI_STARTPPI, BIT(0));
tc35876x_regw(i2c, DSI_STARTDSI, BIT(0));
/* Setting LVDS output frequency */
tc35876x_regw(i2c, LVPHY0, FLD_VAL(1, 20, 16) |
FLD_VAL(2, 15, 14) | FLD_VAL(6, 4, 0)); /* 0x00048006 */
/* Setting video panel control register,0x00000120 VTGen=ON ?!?!? */
tc35876x_regw(i2c, VPCTRL, BIT(8) | BIT(5));
/* Horizontal back porch and horizontal pulse width. 0x00280028 */
tc35876x_regw(i2c, HTIM1, FLD_VAL(40, 24, 16) | FLD_VAL(40, 8, 0));
/* Horizontal front porch and horizontal active video size. 0x00500500*/
tc35876x_regw(i2c, HTIM2, FLD_VAL(80, 24, 16) | FLD_VAL(1280, 10, 0));
/* Vertical back porch and vertical sync pulse width. 0x000e000a */
tc35876x_regw(i2c, VTIM1, FLD_VAL(14, 23, 16) | FLD_VAL(10, 7, 0));
/* Vertical front porch and vertical display size. 0x000e0320 */
tc35876x_regw(i2c, VTIM2, FLD_VAL(14, 23, 16) | FLD_VAL(800, 10, 0));
/* Set above HTIM1, HTIM2, VTIM1, and VTIM2 at next VSYNC. */
tc35876x_regw(i2c, VFUEN, BIT(0));
/* Soft reset LCD controller. */
tc35876x_regw(i2c, SYSRST, BIT(2));
/* LVDS-TX input muxing */
tc35876x_regw(i2c, LVMX0003,
INPUT_MUX(INPUT_R5, INPUT_R4, INPUT_R3, INPUT_R2));
tc35876x_regw(i2c, LVMX0407,
INPUT_MUX(INPUT_G2, INPUT_R7, INPUT_R1, INPUT_R6));
tc35876x_regw(i2c, LVMX0811,
INPUT_MUX(INPUT_G1, INPUT_G0, INPUT_G4, INPUT_G3));
tc35876x_regw(i2c, LVMX1215,
INPUT_MUX(INPUT_B2, INPUT_G7, INPUT_G6, INPUT_G5));
tc35876x_regw(i2c, LVMX1619,
INPUT_MUX(INPUT_B4, INPUT_B3, INPUT_B1, INPUT_B0));
tc35876x_regw(i2c, LVMX2023,
INPUT_MUX(LOGIC_0, INPUT_B7, INPUT_B6, INPUT_B5));
tc35876x_regw(i2c, LVMX2427,
INPUT_MUX(INPUT_R0, INPUT_DE, INPUT_VSYNC, INPUT_HSYNC));
/* Enable LVDS transmitter. */
tc35876x_regw(i2c, LVCFG, BIT(0));
/* Clear notifications. Don't write reserved bits. Was write 0xffffffff
* to 0x0288, must be in error?! */
tc35876x_regw(i2c, DSI_INTCLR, FLD_MASK(31, 30) | FLD_MASK(22, 0));
}
#define GPIOPWMCTRL 0x38F
#define PWM0CLKDIV0 0x62 /* low byte */
#define PWM0CLKDIV1 0x61 /* high byte */
#define SYSTEMCLK 19200000UL /* 19.2 MHz */
#define PWM_FREQUENCY 9600 /* Hz */
/* f = baseclk / (clkdiv + 1) => clkdiv = (baseclk - f) / f */
static inline u16 calc_clkdiv(unsigned long baseclk, unsigned int f)
{
return (baseclk - f) / f;
}
static void tc35876x_brightness_init(struct drm_device *dev)
{
int ret;
u8 pwmctrl;
u16 clkdiv;
/* Make sure the PWM reference is the 19.2 MHz system clock. Read first
* instead of setting directly to catch potential conflicts between PWM
* users. */
ret = intel_scu_ipc_ioread8(GPIOPWMCTRL, &pwmctrl);
if (ret || pwmctrl != 0x01) {
if (ret)
dev_err(&dev->pdev->dev, "GPIOPWMCTRL read failed\n");
else
dev_warn(&dev->pdev->dev, "GPIOPWMCTRL was not set to system clock (pwmctrl = 0x%02x)\n", pwmctrl);
ret = intel_scu_ipc_iowrite8(GPIOPWMCTRL, 0x01);
if (ret)
dev_err(&dev->pdev->dev, "GPIOPWMCTRL set failed\n");
}
clkdiv = calc_clkdiv(SYSTEMCLK, PWM_FREQUENCY);
ret = intel_scu_ipc_iowrite8(PWM0CLKDIV1, (clkdiv >> 8) & 0xff);
if (!ret)
ret = intel_scu_ipc_iowrite8(PWM0CLKDIV0, clkdiv & 0xff);
if (ret)
dev_err(&dev->pdev->dev, "PWM0CLKDIV set failed\n");
else
dev_dbg(&dev->pdev->dev, "PWM0CLKDIV set to 0x%04x (%d Hz)\n",
clkdiv, PWM_FREQUENCY);
}
#define PWM0DUTYCYCLE 0x67
void tc35876x_brightness_control(struct drm_device *dev, int level)
{
int ret;
u8 duty_val;
u8 panel_duty_val;
level = clamp(level, 0, MDFLD_DSI_BRIGHTNESS_MAX_LEVEL);
/* PWM duty cycle 0x00...0x63 corresponds to 0...99% */
duty_val = level * 0x63 / MDFLD_DSI_BRIGHTNESS_MAX_LEVEL;
/* I won't pretend to understand this formula. The panel spec is quite
* bad engrish.
*/
panel_duty_val = (2 * level - 100) * 0xA9 /
MDFLD_DSI_BRIGHTNESS_MAX_LEVEL + 0x56;
ret = intel_scu_ipc_iowrite8(PWM0DUTYCYCLE, duty_val);
if (ret)
dev_err(&tc35876x_client->dev, "%s: ipc write fail\n",
__func__);
if (cmi_lcd_i2c_client) {
ret = i2c_smbus_write_byte_data(cmi_lcd_i2c_client,
PANEL_PWM_MAX, panel_duty_val);
if (ret < 0)
dev_err(&cmi_lcd_i2c_client->dev, "%s: i2c write failed\n",
__func__);
}
}
void tc35876x_toshiba_bridge_panel_off(struct drm_device *dev)
{
if (WARN(!tc35876x_client, "%s called before probe", __func__))
return;
dev_dbg(&tc35876x_client->dev, "%s\n", __func__);
if (bridge_bl_enable)
gpiod_set_value_cansleep(bridge_bl_enable, 0);
if (backlight_voltage)
gpiod_set_value_cansleep(backlight_voltage, 0);
}
void tc35876x_toshiba_bridge_panel_on(struct drm_device *dev)
{
struct drm_psb_private *dev_priv = dev->dev_private;
if (WARN(!tc35876x_client, "%s called before probe", __func__))
return;
dev_dbg(&tc35876x_client->dev, "%s\n", __func__);
if (backlight_voltage) {
gpiod_set_value_cansleep(backlight_voltage, 1);
msleep(260);
}
if (cmi_lcd_i2c_client) {
int ret;
dev_dbg(&cmi_lcd_i2c_client->dev, "setting TCON\n");
/* Bit 4 is average_saving. Setting it to 1, the brightness is
* referenced to the average of the frame content. 0 means
* reference to the maximum of frame contents. Bits 3:0 are
* allow_distort. When set to a nonzero value, all color values
* between 255-allow_distort*2 and 255 are mapped to the
* 255-allow_distort*2 value.
*/
ret = i2c_smbus_write_byte_data(cmi_lcd_i2c_client,
PANEL_ALLOW_DISTORT, 0x10);
if (ret < 0)
dev_err(&cmi_lcd_i2c_client->dev,
"i2c write failed (%d)\n", ret);
ret = i2c_smbus_write_byte_data(cmi_lcd_i2c_client,
PANEL_BYPASS_PWMI, 0);
if (ret < 0)
dev_err(&cmi_lcd_i2c_client->dev,
"i2c write failed (%d)\n", ret);
/* Set minimum brightness value - this is tunable */
ret = i2c_smbus_write_byte_data(cmi_lcd_i2c_client,
PANEL_PWM_MIN, 0x35);
if (ret < 0)
dev_err(&cmi_lcd_i2c_client->dev,
"i2c write failed (%d)\n", ret);
}
if (bridge_bl_enable)
gpiod_set_value_cansleep(bridge_bl_enable, 1);
tc35876x_brightness_control(dev, dev_priv->brightness_adjusted);
}
static struct drm_display_mode *tc35876x_get_config_mode(struct drm_device *dev)
{
struct drm_display_mode *mode;
dev_dbg(&dev->pdev->dev, "%s\n", __func__);
mode = kzalloc(sizeof(*mode), GFP_KERNEL);
if (!mode)
return NULL;
/* FIXME: do this properly. */
mode->hdisplay = 1280;
mode->vdisplay = 800;
mode->hsync_start = 1360;
mode->hsync_end = 1400;
mode->htotal = 1440;
mode->vsync_start = 814;
mode->vsync_end = 824;
mode->vtotal = 838;
mode->clock = 33324 << 1;
dev_info(&dev->pdev->dev, "hdisplay(w) = %d\n", mode->hdisplay);
dev_info(&dev->pdev->dev, "vdisplay(h) = %d\n", mode->vdisplay);
dev_info(&dev->pdev->dev, "HSS = %d\n", mode->hsync_start);
dev_info(&dev->pdev->dev, "HSE = %d\n", mode->hsync_end);
dev_info(&dev->pdev->dev, "htotal = %d\n", mode->htotal);
dev_info(&dev->pdev->dev, "VSS = %d\n", mode->vsync_start);
dev_info(&dev->pdev->dev, "VSE = %d\n", mode->vsync_end);
dev_info(&dev->pdev->dev, "vtotal = %d\n", mode->vtotal);
dev_info(&dev->pdev->dev, "clock = %d\n", mode->clock);
drm_mode_set_name(mode);
drm_mode_set_crtcinfo(mode, 0);
mode->type |= DRM_MODE_TYPE_PREFERRED;
return mode;
}
/* DV1 Active area 216.96 x 135.6 mm */
#define DV1_PANEL_WIDTH 217
#define DV1_PANEL_HEIGHT 136
static int tc35876x_get_panel_info(struct drm_device *dev, int pipe,
struct panel_info *pi)
{
if (!dev || !pi)
return -EINVAL;
pi->width_mm = DV1_PANEL_WIDTH;
pi->height_mm = DV1_PANEL_HEIGHT;
return 0;
}
static int tc35876x_bridge_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
dev_info(&client->dev, "%s\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "%s: i2c_check_functionality() failed\n",
__func__);
return -ENODEV;
}
bridge_reset = devm_gpiod_get_optional(&client->dev, "bridge-reset", GPIOD_OUT_LOW);
if (IS_ERR(bridge_reset))
return PTR_ERR(bridge_reset);
if (bridge_reset)
gpiod_set_consumer_name(bridge_reset, "tc35876x bridge reset");
bridge_bl_enable = devm_gpiod_get_optional(&client->dev, "bl-en", GPIOD_OUT_LOW);
if (IS_ERR(bridge_bl_enable))
return PTR_ERR(bridge_bl_enable);
if (bridge_bl_enable)
gpiod_set_consumer_name(bridge_bl_enable, "tc35876x panel bl en");
backlight_voltage = devm_gpiod_get_optional(&client->dev, "vadd", GPIOD_OUT_LOW);
if (IS_ERR(backlight_voltage))
return PTR_ERR(backlight_voltage);
if (backlight_voltage)
gpiod_set_consumer_name(backlight_voltage, "tc35876x panel vadd");
tc35876x_client = client;
return 0;
}
static int tc35876x_bridge_remove(struct i2c_client *client)
{
dev_dbg(&client->dev, "%s\n", __func__);
tc35876x_client = NULL;
return 0;
}
static const struct i2c_device_id tc35876x_bridge_id[] = {
{ "i2c_disp_brig", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tc35876x_bridge_id);
static struct i2c_driver tc35876x_bridge_i2c_driver = {
.driver = {
.name = "i2c_disp_brig",
},
.id_table = tc35876x_bridge_id,
.probe = tc35876x_bridge_probe,
.remove = tc35876x_bridge_remove,
};
/* LCD panel I2C */
static int cmi_lcd_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
dev_info(&client->dev, "%s\n", __func__);
if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
dev_err(&client->dev, "%s: i2c_check_functionality() failed\n",
__func__);
return -ENODEV;
}
cmi_lcd_i2c_client = client;
return 0;
}
static int cmi_lcd_i2c_remove(struct i2c_client *client)
{
dev_dbg(&client->dev, "%s\n", __func__);
cmi_lcd_i2c_client = NULL;
return 0;
}
static const struct i2c_device_id cmi_lcd_i2c_id[] = {
{ "cmi-lcd", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, cmi_lcd_i2c_id);
static struct i2c_driver cmi_lcd_i2c_driver = {
.driver = {
.name = "cmi-lcd",
},
.id_table = cmi_lcd_i2c_id,
.probe = cmi_lcd_i2c_probe,
.remove = cmi_lcd_i2c_remove,
};
/* HACK to create I2C device while it's not created by platform code */
#define CMI_LCD_I2C_ADAPTER 2
#define CMI_LCD_I2C_ADDR 0x60
static int cmi_lcd_hack_create_device(void)
{
struct i2c_adapter *adapter;
struct i2c_client *client;
struct i2c_board_info info = {
.type = "cmi-lcd",
.addr = CMI_LCD_I2C_ADDR,
};
pr_debug("%s\n", __func__);
adapter = i2c_get_adapter(CMI_LCD_I2C_ADAPTER);
if (!adapter) {
pr_err("%s: i2c_get_adapter(%d) failed\n", __func__,
CMI_LCD_I2C_ADAPTER);
return -EINVAL;
}
client = i2c_new_client_device(adapter, &info);
if (IS_ERR(client)) {
pr_err("%s: creating I2C device failed\n", __func__);
i2c_put_adapter(adapter);
return PTR_ERR(client);
}
return 0;
}
static const struct drm_encoder_helper_funcs tc35876x_encoder_helper_funcs = {
.dpms = mdfld_dsi_dpi_dpms,
.mode_fixup = mdfld_dsi_dpi_mode_fixup,
.prepare = mdfld_dsi_dpi_prepare,
.mode_set = mdfld_dsi_dpi_mode_set,
.commit = mdfld_dsi_dpi_commit,
};
const struct panel_funcs mdfld_tc35876x_funcs = {
.encoder_helper_funcs = &tc35876x_encoder_helper_funcs,
.get_config_mode = tc35876x_get_config_mode,
.get_panel_info = tc35876x_get_panel_info,
};
void tc35876x_init(struct drm_device *dev)
{
int r;
dev_dbg(&dev->pdev->dev, "%s\n", __func__);
cmi_lcd_hack_create_device();
r = i2c_add_driver(&cmi_lcd_i2c_driver);
if (r < 0)
dev_err(&dev->pdev->dev,
"%s: i2c_add_driver() for %s failed (%d)\n",
__func__, cmi_lcd_i2c_driver.driver.name, r);
r = i2c_add_driver(&tc35876x_bridge_i2c_driver);
if (r < 0)
dev_err(&dev->pdev->dev,
"%s: i2c_add_driver() for %s failed (%d)\n",
__func__, tc35876x_bridge_i2c_driver.driver.name, r);
tc35876x_brightness_init(dev);
}
void tc35876x_exit(void)
{
pr_debug("%s\n", __func__);
i2c_del_driver(&tc35876x_bridge_i2c_driver);
if (cmi_lcd_i2c_client)
i2c_del_driver(&cmi_lcd_i2c_driver);
}
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