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drivers: video: Add Support for Himax HX8238D Panel

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* SPI based initialization for HX8238D
* Resolution: 320x240
* Color-Mode: RGB

* Initial Work is done by Sjoerd Simons
  https://gitlab.apertis.org/packaging/u-boot/-/blob\
  /5f259720e3e64965d50da89a841ad6eb256a47df/debian/patches\
  /apertis/powertools/0005-video-Add-Himax-HX8238-D-driver.patch

* Tested on Bosch Guardian Board

Cc: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Moses Christopher <BollavarapuMoses.Christopher@in.bosch.com>
This commit is contained in:
Moses Christopher 2021-01-06 15:31:35 +00:00 committed by Anatolij Gustschin
parent 196947b103
commit 0f425612c8
3 changed files with 208 additions and 0 deletions
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10
drivers/video/Kconfig
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@ -160,6 +160,16 @@ config CONSOLE_TRUETYPE
With this option you can adjust the text size and use a variety of
fonts. Note that this is noticeably slower than with normal console.
config DM_PANEL_HX8238D
bool "Enable Himax HX-8238D LCD driver"
depends on DM_VIDEO
help
Support for HX-8238D LCD Panel
The HX8238-D is a single chip controller and driver LSI that
integrates the power circuit.
It can drive a maximum 960x240 dot graphics on a-TFT panel
displays in 16M colors with dithering.
config CONSOLE_TRUETYPE_SIZE
int "TrueType font size"
depends on CONSOLE_TRUETYPE

1
drivers/video/Makefile
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@ -15,6 +15,7 @@ obj-$(CONFIG_VIDEO_MIPI_DSI) += dsi-host-uclass.o
obj-$(CONFIG_DM_VIDEO) += video-uclass.o vidconsole-uclass.o
obj-$(CONFIG_DM_VIDEO) += video_bmp.o
obj-$(CONFIG_PANEL) += panel-uclass.o
obj-$(CONFIG_PANEL_HX8238D) += hx8238d.o
obj-$(CONFIG_SIMPLE_PANEL) += simple_panel.o
endif

197
drivers/video/hx8238d.c Normal file
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@ -0,0 +1,197 @@
// SPDX-License-Identifier: GPL-2.0+
/*
* Copied from simple-panel
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <sjg@chromium.org>
* Copyright (c) 2018 Sjoerd Simons <sjoerd.simons@collabora.co.uk>
* Modified by Moses Christopher <BollavarapuMoses.Christopher@in.bosch.com>
*
* Panel Initialization for HX8238D panel from Himax
* Resolution: 320x240
* Color-Mode: RGB
*
*/
#include <common.h>
#include <dm.h>
#include <panel.h>
#include <spi.h>
DECLARE_GLOBAL_DATA_PTR;
/* Register Address */
#define HX8238D_OUTPUT_CTRL_ADDR 0x01
#define HX8238D_LCD_AC_CTRL_ADDR 0x02
#define HX8238D_POWER_CTRL_1_ADDR 0x03
#define HX8238D_DATA_CLR_CTRL_ADDR 0X04
#define HX8238D_FUNCTION_CTRL_ADDR 0x05
#define HX8238D_LED_CTRL_ADDR 0x08
#define HX8238D_CONT_BRIGHT_CTRL_ADDR 0x0A
#define HX8238D_FRAME_CYCLE_CTRL_ADDR 0x0B
#define HX8238D_POWER_CTRL_2_ADDR 0x0D
#define HX8238D_POWER_CTRL_3_ADDR 0x0E
#define HX8238D_GATE_SCAN_POS_ADDR 0x0F
#define HX8238D_HORIZONTAL_PORCH_ADDR 0x16
#define HX8238D_VERTICAL_PORCH_ADDR 0x17
#define HX8238D_POWER_CTRL_4_ADDR 0x1E
#define HX8238D_GAMMA_CTRL_1_ADDR 0x30
#define HX8238D_GAMMA_CTRL_2_ADDR 0x31
#define HX8238D_GAMMA_CTRL_3_ADDR 0x32
#define HX8238D_GAMMA_CTRL_4_ADDR 0x33
#define HX8238D_GAMMA_CTRL_5_ADDR 0x34
#define HX8238D_GAMMA_CTRL_6_ADDR 0x35
#define HX8238D_GAMMA_CTRL_7_ADDR 0x36
#define HX8238D_GAMMA_CTRL_8_ADDR 0x37
#define HX8238D_GAMMA_CTRL_9_ADDR 0x3A
#define HX8238D_GAMMA_CTRL_10_ADDR 0x3B
/* Register Data */
#define HX8238D_OUTPUT_CTRL 0x6300
#define HX8238D_LCD_AC_CTRL 0x0200
#define HX8238D_POWER_CTRL_1 0x6564
#define HX8238D_DATA_CLR_CTRL 0x04C7
#define HX8238D_FUNCTION_CTRL 0xA884
#define HX8238D_LED_CTRL 0x00CE
#define HX8238D_CONT_BRIGHT_CTRL 0x4008
#define HX8238D_FRAME_CYCLE_CTRL 0xD400
#define HX8238D_POWER_CTRL_2 0x3229
#define HX8238D_POWER_CTRL_3 0x1200
#define HX8238D_GATE_SCAN_POS 0x0000
#define HX8238D_HORIZONTAL_PORCH 0x9F80
#define HX8238D_VERTICAL_PORCH 0x3F02
#define HX8238D_POWER_CTRL_4 0x005C
/* Gamma Control */
#define HX8238D_GAMMA_CTRL_1 0x0103
#define HX8238D_GAMMA_CTRL_2 0x0407
#define HX8238D_GAMMA_CTRL_3 0x0705
#define HX8238D_GAMMA_CTRL_4 0x0002
#define HX8238D_GAMMA_CTRL_5 0x0505
#define HX8238D_GAMMA_CTRL_6 0x0303
#define HX8238D_GAMMA_CTRL_7 0x0707
#define HX8238D_GAMMA_CTRL_8 0x0100
#define HX8238D_GAMMA_CTRL_9 0x1F00
#define HX8238D_GAMMA_CTRL_10 0x000F
/* Primary SPI register identification, 011100 */
/* Select register, RS=0, RS=0 */
/* Write register, RS=1, RW=0 */
#define HX8238D_PRIMARY_SELECT_REG 0x70
#define HX8238D_PRIMARY_WRITE_REG (HX8238D_PRIMARY_SELECT_REG | (0x1 << 1))
#define HX8238D_REG_BIT_LEN 24
struct hx8238d_priv {
struct spi_slave *spi;
};
static int hx8238d_ofdata_to_platdata(struct udevice *dev)
{
struct hx8238d_priv *priv = dev_get_priv(dev);
priv->spi = dev_get_parent_priv(dev);
return 0;
}
/* data[0] => REGISTER ADDRESS */
/* data[1] => REGISTER VALUE */
struct hx8238d_command {
u16 data[2];
};
static struct hx8238d_command hx8238d_init_commands[] = {
{ .data = { HX8238D_OUTPUT_CTRL_ADDR, HX8238D_OUTPUT_CTRL } },
{ .data = { HX8238D_LCD_AC_CTRL_ADDR, HX8238D_LCD_AC_CTRL } },
{ .data = { HX8238D_POWER_CTRL_1_ADDR, HX8238D_POWER_CTRL_1 } },
{ .data = { HX8238D_DATA_CLR_CTRL_ADDR, HX8238D_DATA_CLR_CTRL } },
{ .data = { HX8238D_FUNCTION_CTRL_ADDR, HX8238D_FUNCTION_CTRL } },
{ .data = { HX8238D_LED_CTRL_ADDR, HX8238D_LED_CTRL } },
{ .data = { HX8238D_CONT_BRIGHT_CTRL_ADDR, HX8238D_CONT_BRIGHT_CTRL } },
{ .data = { HX8238D_FRAME_CYCLE_CTRL_ADDR, HX8238D_FRAME_CYCLE_CTRL } },
{ .data = { HX8238D_POWER_CTRL_2_ADDR, HX8238D_POWER_CTRL_2 } },
{ .data = { HX8238D_POWER_CTRL_3_ADDR, HX8238D_POWER_CTRL_3 } },
{ .data = { HX8238D_GATE_SCAN_POS_ADDR, HX8238D_GATE_SCAN_POS } },
{ .data = { HX8238D_HORIZONTAL_PORCH_ADDR, HX8238D_HORIZONTAL_PORCH } },
{ .data = { HX8238D_VERTICAL_PORCH_ADDR, HX8238D_VERTICAL_PORCH } },
{ .data = { HX8238D_POWER_CTRL_4_ADDR, HX8238D_POWER_CTRL_4 } },
{ .data = { HX8238D_GAMMA_CTRL_1_ADDR, HX8238D_GAMMA_CTRL_1 } },
{ .data = { HX8238D_GAMMA_CTRL_2_ADDR, HX8238D_GAMMA_CTRL_2 } },
{ .data = { HX8238D_GAMMA_CTRL_3_ADDR, HX8238D_GAMMA_CTRL_3 } },
{ .data = { HX8238D_GAMMA_CTRL_4_ADDR, HX8238D_GAMMA_CTRL_4 } },
{ .data = { HX8238D_GAMMA_CTRL_5_ADDR, HX8238D_GAMMA_CTRL_5 } },
{ .data = { HX8238D_GAMMA_CTRL_6_ADDR, HX8238D_GAMMA_CTRL_6 } },
{ .data = { HX8238D_GAMMA_CTRL_7_ADDR, HX8238D_GAMMA_CTRL_7 } },
{ .data = { HX8238D_GAMMA_CTRL_8_ADDR, HX8238D_GAMMA_CTRL_8 } },
{ .data = { HX8238D_GAMMA_CTRL_9_ADDR, HX8238D_GAMMA_CTRL_9 } },
{ .data = { HX8238D_GAMMA_CTRL_10_ADDR, HX8238D_GAMMA_CTRL_10 } },
};
/*
* Generate Primary Register Buffer for Register Select and Register Write
* First 6 MSB bits of Primary Register is represented with 011100
*
*/
static void hx8238d_generate_reg_buffers(struct hx8238d_command command,
u8 *sr_buf, uint8_t *wr_buf)
{
struct hx8238d_command cmd = command;
sr_buf[0] = HX8238D_PRIMARY_SELECT_REG;
sr_buf[1] = (cmd.data[0] >> 8) & 0xff;
sr_buf[2] = (cmd.data[0]) & 0xff;
wr_buf[0] = HX8238D_PRIMARY_WRITE_REG;
wr_buf[1] = (cmd.data[1] >> 8) & 0xff;
wr_buf[2] = (cmd.data[1]) & 0xff;
}
static int hx8238d_probe(struct udevice *dev)
{
struct hx8238d_priv *priv = dev_get_priv(dev);
int ret;
ret = spi_claim_bus(priv->spi);
if (ret) {
debug("Failed to claim bus: %d\n", ret);
return ret;
}
for (int i = 0; i < ARRAY_SIZE(hx8238d_init_commands); i++) {
u8 sr_buf[3], wr_buf[3];
const struct hx8238d_command cmd = hx8238d_init_commands[i];
hx8238d_generate_reg_buffers(cmd, sr_buf, wr_buf);
ret = spi_xfer(priv->spi, HX8238D_REG_BIT_LEN, sr_buf, NULL,
SPI_XFER_BEGIN | SPI_XFER_END);
if (ret) {
debug("Failed to select register %d\n", ret);
goto free;
}
ret = spi_xfer(priv->spi, HX8238D_REG_BIT_LEN, wr_buf, NULL,
SPI_XFER_BEGIN | SPI_XFER_END);
if (ret) {
debug("Failed to write value %d\n", ret);
goto free;
}
}
free:
spi_release_bus(priv->spi);
return ret;
}
static const struct udevice_id hx8238d_ids[] = {
{ .compatible = "himax,hx8238d" },
{ }
};
U_BOOT_DRIVER(hx8238d) = {
.name = "hx8238d",
.id = UCLASS_PANEL,
.of_match = hx8238d_ids,
.ofdata_to_platdata = hx8238d_ofdata_to_platdata,
.probe = hx8238d_probe,
.priv_auto_alloc_size = sizeof(struct hx8238d_priv),
};