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linuxdebug/drivers/video/fbdev/omap2/omapfb/displays/panel-tpo-td028ttec1.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0-only
/*
* Toppoly TD028TTEC1 panel support
*
* Copyright (C) 2008 Nokia Corporation
* Author: Tomi Valkeinen <tomi.valkeinen@nokia.com>
*
* Neo 1973 code (jbt6k74.c):
* Copyright (C) 2006-2007 by OpenMoko, Inc.
* Author: Harald Welte <laforge@openmoko.org>
*
* Ported and adapted from Neo 1973 U-Boot by:
* H. Nikolaus Schaller <hns@goldelico.com>
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/spi/spi.h>
#include <linux/gpio.h>
#include <video/omapfb_dss.h>
struct panel_drv_data {
struct omap_dss_device dssdev;
struct omap_dss_device *in;
int data_lines;
struct omap_video_timings videomode;
struct spi_device *spi_dev;
};
static const struct omap_video_timings td028ttec1_panel_timings = {
.x_res = 480,
.y_res = 640,
.pixelclock = 22153000,
.hfp = 24,
.hsw = 8,
.hbp = 8,
.vfp = 4,
.vsw = 2,
.vbp = 2,
.vsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.hsync_level = OMAPDSS_SIG_ACTIVE_LOW,
.data_pclk_edge = OMAPDSS_DRIVE_SIG_FALLING_EDGE,
.de_level = OMAPDSS_SIG_ACTIVE_HIGH,
.sync_pclk_edge = OMAPDSS_DRIVE_SIG_RISING_EDGE,
};
#define JBT_COMMAND 0x000
#define JBT_DATA 0x100
static int jbt_ret_write_0(struct panel_drv_data *ddata, u8 reg)
{
int rc;
u16 tx_buf = JBT_COMMAND | reg;
rc = spi_write(ddata->spi_dev, (u8 *)&tx_buf,
1*sizeof(u16));
if (rc != 0)
dev_err(&ddata->spi_dev->dev,
"jbt_ret_write_0 spi_write ret %d\n", rc);
return rc;
}
static int jbt_reg_write_1(struct panel_drv_data *ddata, u8 reg, u8 data)
{
int rc;
u16 tx_buf[2];
tx_buf[0] = JBT_COMMAND | reg;
tx_buf[1] = JBT_DATA | data;
rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
2*sizeof(u16));
if (rc != 0)
dev_err(&ddata->spi_dev->dev,
"jbt_reg_write_1 spi_write ret %d\n", rc);
return rc;
}
static int jbt_reg_write_2(struct panel_drv_data *ddata, u8 reg, u16 data)
{
int rc;
u16 tx_buf[3];
tx_buf[0] = JBT_COMMAND | reg;
tx_buf[1] = JBT_DATA | (data >> 8);
tx_buf[2] = JBT_DATA | (data & 0xff);
rc = spi_write(ddata->spi_dev, (u8 *)tx_buf,
3*sizeof(u16));
if (rc != 0)
dev_err(&ddata->spi_dev->dev,
"jbt_reg_write_2 spi_write ret %d\n", rc);
return rc;
}
enum jbt_register {
JBT_REG_SLEEP_IN = 0x10,
JBT_REG_SLEEP_OUT = 0x11,
JBT_REG_DISPLAY_OFF = 0x28,
JBT_REG_DISPLAY_ON = 0x29,
JBT_REG_RGB_FORMAT = 0x3a,
JBT_REG_QUAD_RATE = 0x3b,
JBT_REG_POWER_ON_OFF = 0xb0,
JBT_REG_BOOSTER_OP = 0xb1,
JBT_REG_BOOSTER_MODE = 0xb2,
JBT_REG_BOOSTER_FREQ = 0xb3,
JBT_REG_OPAMP_SYSCLK = 0xb4,
JBT_REG_VSC_VOLTAGE = 0xb5,
JBT_REG_VCOM_VOLTAGE = 0xb6,
JBT_REG_EXT_DISPL = 0xb7,
JBT_REG_OUTPUT_CONTROL = 0xb8,
JBT_REG_DCCLK_DCEV = 0xb9,
JBT_REG_DISPLAY_MODE1 = 0xba,
JBT_REG_DISPLAY_MODE2 = 0xbb,
JBT_REG_DISPLAY_MODE = 0xbc,
JBT_REG_ASW_SLEW = 0xbd,
JBT_REG_DUMMY_DISPLAY = 0xbe,
JBT_REG_DRIVE_SYSTEM = 0xbf,
JBT_REG_SLEEP_OUT_FR_A = 0xc0,
JBT_REG_SLEEP_OUT_FR_B = 0xc1,
JBT_REG_SLEEP_OUT_FR_C = 0xc2,
JBT_REG_SLEEP_IN_LCCNT_D = 0xc3,
JBT_REG_SLEEP_IN_LCCNT_E = 0xc4,
JBT_REG_SLEEP_IN_LCCNT_F = 0xc5,
JBT_REG_SLEEP_IN_LCCNT_G = 0xc6,
JBT_REG_GAMMA1_FINE_1 = 0xc7,
JBT_REG_GAMMA1_FINE_2 = 0xc8,
JBT_REG_GAMMA1_INCLINATION = 0xc9,
JBT_REG_GAMMA1_BLUE_OFFSET = 0xca,
JBT_REG_BLANK_CONTROL = 0xcf,
JBT_REG_BLANK_TH_TV = 0xd0,
JBT_REG_CKV_ON_OFF = 0xd1,
JBT_REG_CKV_1_2 = 0xd2,
JBT_REG_OEV_TIMING = 0xd3,
JBT_REG_ASW_TIMING_1 = 0xd4,
JBT_REG_ASW_TIMING_2 = 0xd5,
JBT_REG_HCLOCK_VGA = 0xec,
JBT_REG_HCLOCK_QVGA = 0xed,
};
#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev)
static int td028ttec1_panel_connect(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
int r;
if (omapdss_device_is_connected(dssdev))
return 0;
r = in->ops.dpi->connect(in, dssdev);
if (r)
return r;
return 0;
}
static void td028ttec1_panel_disconnect(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
if (!omapdss_device_is_connected(dssdev))
return;
in->ops.dpi->disconnect(in, dssdev);
}
static int td028ttec1_panel_enable(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
int r;
if (!omapdss_device_is_connected(dssdev))
return -ENODEV;
if (omapdss_device_is_enabled(dssdev))
return 0;
if (ddata->data_lines)
in->ops.dpi->set_data_lines(in, ddata->data_lines);
in->ops.dpi->set_timings(in, &ddata->videomode);
r = in->ops.dpi->enable(in);
if (r)
return r;
dev_dbg(dssdev->dev, "td028ttec1_panel_enable() - state %d\n",
dssdev->state);
/* three times command zero */
r |= jbt_ret_write_0(ddata, 0x00);
usleep_range(1000, 2000);
r |= jbt_ret_write_0(ddata, 0x00);
usleep_range(1000, 2000);
r |= jbt_ret_write_0(ddata, 0x00);
usleep_range(1000, 2000);
if (r) {
dev_warn(dssdev->dev, "transfer error\n");
goto transfer_err;
}
/* deep standby out */
r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x17);
/* RGB I/F on, RAM write off, QVGA through, SIGCON enable */
r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE, 0x80);
/* Quad mode off */
r |= jbt_reg_write_1(ddata, JBT_REG_QUAD_RATE, 0x00);
/* AVDD on, XVDD on */
r |= jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x16);
/* Output control */
r |= jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0xfff9);
/* Sleep mode off */
r |= jbt_ret_write_0(ddata, JBT_REG_SLEEP_OUT);
/* at this point we have like 50% grey */
/* initialize register set */
r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE1, 0x01);
r |= jbt_reg_write_1(ddata, JBT_REG_DISPLAY_MODE2, 0x00);
r |= jbt_reg_write_1(ddata, JBT_REG_RGB_FORMAT, 0x60);
r |= jbt_reg_write_1(ddata, JBT_REG_DRIVE_SYSTEM, 0x10);
r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_OP, 0x56);
r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_MODE, 0x33);
r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
r |= jbt_reg_write_1(ddata, JBT_REG_BOOSTER_FREQ, 0x11);
r |= jbt_reg_write_1(ddata, JBT_REG_OPAMP_SYSCLK, 0x02);
r |= jbt_reg_write_1(ddata, JBT_REG_VSC_VOLTAGE, 0x2b);
r |= jbt_reg_write_1(ddata, JBT_REG_VCOM_VOLTAGE, 0x40);
r |= jbt_reg_write_1(ddata, JBT_REG_EXT_DISPL, 0x03);
r |= jbt_reg_write_1(ddata, JBT_REG_DCCLK_DCEV, 0x04);
/*
* default of 0x02 in JBT_REG_ASW_SLEW responsible for 72Hz requirement
* to avoid red / blue flicker
*/
r |= jbt_reg_write_1(ddata, JBT_REG_ASW_SLEW, 0x04);
r |= jbt_reg_write_1(ddata, JBT_REG_DUMMY_DISPLAY, 0x00);
r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_A, 0x11);
r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_B, 0x11);
r |= jbt_reg_write_1(ddata, JBT_REG_SLEEP_OUT_FR_C, 0x11);
r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_D, 0x2040);
r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_E, 0x60c0);
r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_F, 0x1020);
r |= jbt_reg_write_2(ddata, JBT_REG_SLEEP_IN_LCCNT_G, 0x60c0);
r |= jbt_reg_write_2(ddata, JBT_REG_GAMMA1_FINE_1, 0x5533);
r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_FINE_2, 0x00);
r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_INCLINATION, 0x00);
r |= jbt_reg_write_1(ddata, JBT_REG_GAMMA1_BLUE_OFFSET, 0x00);
r |= jbt_reg_write_2(ddata, JBT_REG_HCLOCK_VGA, 0x1f0);
r |= jbt_reg_write_1(ddata, JBT_REG_BLANK_CONTROL, 0x02);
r |= jbt_reg_write_2(ddata, JBT_REG_BLANK_TH_TV, 0x0804);
r |= jbt_reg_write_1(ddata, JBT_REG_CKV_ON_OFF, 0x01);
r |= jbt_reg_write_2(ddata, JBT_REG_CKV_1_2, 0x0000);
r |= jbt_reg_write_2(ddata, JBT_REG_OEV_TIMING, 0x0d0e);
r |= jbt_reg_write_2(ddata, JBT_REG_ASW_TIMING_1, 0x11a4);
r |= jbt_reg_write_1(ddata, JBT_REG_ASW_TIMING_2, 0x0e);
r |= jbt_ret_write_0(ddata, JBT_REG_DISPLAY_ON);
dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
transfer_err:
return r ? -EIO : 0;
}
static void td028ttec1_panel_disable(struct omap_dss_device *dssdev)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
if (!omapdss_device_is_enabled(dssdev))
return;
dev_dbg(dssdev->dev, "td028ttec1_panel_disable()\n");
jbt_ret_write_0(ddata, JBT_REG_DISPLAY_OFF);
jbt_reg_write_2(ddata, JBT_REG_OUTPUT_CONTROL, 0x8002);
jbt_ret_write_0(ddata, JBT_REG_SLEEP_IN);
jbt_reg_write_1(ddata, JBT_REG_POWER_ON_OFF, 0x00);
in->ops.dpi->disable(in);
dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
}
static void td028ttec1_panel_set_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
ddata->videomode = *timings;
dssdev->panel.timings = *timings;
in->ops.dpi->set_timings(in, timings);
}
static void td028ttec1_panel_get_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
*timings = ddata->videomode;
}
static int td028ttec1_panel_check_timings(struct omap_dss_device *dssdev,
struct omap_video_timings *timings)
{
struct panel_drv_data *ddata = to_panel_data(dssdev);
struct omap_dss_device *in = ddata->in;
return in->ops.dpi->check_timings(in, timings);
}
static struct omap_dss_driver td028ttec1_ops = {
.connect = td028ttec1_panel_connect,
.disconnect = td028ttec1_panel_disconnect,
.enable = td028ttec1_panel_enable,
.disable = td028ttec1_panel_disable,
.set_timings = td028ttec1_panel_set_timings,
.get_timings = td028ttec1_panel_get_timings,
.check_timings = td028ttec1_panel_check_timings,
};
static int td028ttec1_probe_of(struct spi_device *spi)
{
struct device_node *node = spi->dev.of_node;
struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
struct omap_dss_device *in;
in = omapdss_of_find_source_for_first_ep(node);
if (IS_ERR(in)) {
dev_err(&spi->dev, "failed to find video source\n");
return PTR_ERR(in);
}
ddata->in = in;
return 0;
}
static int td028ttec1_panel_probe(struct spi_device *spi)
{
struct panel_drv_data *ddata;
struct omap_dss_device *dssdev;
int r;
dev_dbg(&spi->dev, "%s\n", __func__);
if (!spi->dev.of_node)
return -ENODEV;
spi->bits_per_word = 9;
spi->mode = SPI_MODE_3;
r = spi_setup(spi);
if (r < 0) {
dev_err(&spi->dev, "spi_setup failed: %d\n", r);
return r;
}
ddata = devm_kzalloc(&spi->dev, sizeof(*ddata), GFP_KERNEL);
if (ddata == NULL)
return -ENOMEM;
dev_set_drvdata(&spi->dev, ddata);
ddata->spi_dev = spi;
r = td028ttec1_probe_of(spi);
if (r)
return r;
ddata->videomode = td028ttec1_panel_timings;
dssdev = &ddata->dssdev;
dssdev->dev = &spi->dev;
dssdev->driver = &td028ttec1_ops;
dssdev->type = OMAP_DISPLAY_TYPE_DPI;
dssdev->owner = THIS_MODULE;
dssdev->panel.timings = ddata->videomode;
dssdev->phy.dpi.data_lines = ddata->data_lines;
r = omapdss_register_display(dssdev);
if (r) {
dev_err(&spi->dev, "Failed to register panel\n");
goto err_reg;
}
return 0;
err_reg:
omap_dss_put_device(ddata->in);
return r;
}
static void td028ttec1_panel_remove(struct spi_device *spi)
{
struct panel_drv_data *ddata = dev_get_drvdata(&spi->dev);
struct omap_dss_device *dssdev = &ddata->dssdev;
struct omap_dss_device *in = ddata->in;
dev_dbg(&ddata->spi_dev->dev, "%s\n", __func__);
omapdss_unregister_display(dssdev);
td028ttec1_panel_disable(dssdev);
td028ttec1_panel_disconnect(dssdev);
omap_dss_put_device(in);
}
static const struct of_device_id td028ttec1_of_match[] = {
{ .compatible = "omapdss,tpo,td028ttec1", },
/* keep to not break older DTB */
{ .compatible = "omapdss,toppoly,td028ttec1", },
{},
};
MODULE_DEVICE_TABLE(of, td028ttec1_of_match);
static const struct spi_device_id td028ttec1_ids[] = {
{ "toppoly,td028ttec1", 0 },
{ "tpo,td028ttec1", 0},
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(spi, td028ttec1_ids);
static struct spi_driver td028ttec1_spi_driver = {
.probe = td028ttec1_panel_probe,
.remove = td028ttec1_panel_remove,
.id_table = td028ttec1_ids,
.driver = {
.name = "panel-tpo-td028ttec1",
.of_match_table = td028ttec1_of_match,
.suppress_bind_attrs = true,
},
};
module_spi_driver(td028ttec1_spi_driver);
MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
MODULE_DESCRIPTION("Toppoly TD028TTEC1 panel driver");
MODULE_LICENSE("GPL");