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linux/drivers/gpu/drm/panel/panel-orisetech-ota5601a.c
Rob Herring 722d4f06e5 drm: Explicitly include correct DT includes 
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Steven Price <steven.price@arm.com>
Acked-by: Liviu Dudau <liviu.dudau@arm.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230714174545.4056287-1-robh@kernel.org
2023-07-21 09:12:43 +02:00

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// SPDX-License-Identifier: GPL-2.0
/*
* Orisetech OTA5601A TFT LCD panel driver
*
* Copyright (C) 2021, Christophe Branchereau <cbranchereau@gmail.com>
*/
#include <linux/bits.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/gpio/consumer.h>
#include <linux/media-bus-format.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/spi/spi.h>
#include <drm/drm_modes.h>
#include <drm/drm_panel.h>
#define OTA5601A_CTL 0x01
#define OTA5601A_CTL_OFF 0x00
#define OTA5601A_CTL_ON BIT(0)
struct ota5601a_panel_info {
const struct drm_display_mode *display_modes;
unsigned int num_modes;
u16 width_mm, height_mm;
u32 bus_format, bus_flags;
};
struct ota5601a {
struct drm_panel drm_panel;
struct regmap *map;
struct regulator *supply;
const struct ota5601a_panel_info *panel_info;
struct gpio_desc *reset_gpio;
};
static inline struct ota5601a *to_ota5601a(struct drm_panel *panel)
{
return container_of(panel, struct ota5601a, drm_panel);
}
static const struct reg_sequence ota5601a_panel_regs[] = {
{ 0xfd, 0x00 }, /* Page Shift */
{ 0x02, 0x00 }, /* Reset */
{ 0x18, 0x00 }, /* Interface Sel: RGB 24 Bits */
{ 0x34, 0x20 }, /* Undocumented */
{ 0x0c, 0x01 }, /* Contrast set by CMD1 == within page 0x00 */
{ 0x0d, 0x48 }, /* R Brightness */
{ 0x0e, 0x48 }, /* G Brightness */
{ 0x0f, 0x48 }, /* B Brightness */
{ 0x07, 0x40 }, /* R Contrast */
{ 0x08, 0x33 }, /* G Contrast */
{ 0x09, 0x3a }, /* B Contrast */
{ 0x16, 0x01 }, /* NTSC Sel */
{ 0x19, 0x8d }, /* VBLK */
{ 0x1a, 0x28 }, /* HBLK */
{ 0x1c, 0x00 }, /* Scan Shift Dir. */
{ 0xfd, 0xc5 }, /* Page Shift */
{ 0x82, 0x0c }, /* PWR_CTRL Pump */
{ 0xa2, 0xb4 }, /* PWR_CTRL VGH/VGL */
{ 0xfd, 0xc4 }, /* Page Shift - What follows is listed as "RGB 24bit Timing Set" */
{ 0x82, 0x45 },
{ 0xfd, 0xc1 },
{ 0x91, 0x02 },
{ 0xfd, 0xc0 },
{ 0xa1, 0x01 },
{ 0xa2, 0x1f },
{ 0xa3, 0x0b },
{ 0xa4, 0x38 },
{ 0xa5, 0x00 },
{ 0xa6, 0x0a },
{ 0xa7, 0x38 },
{ 0xa8, 0x00 },
{ 0xa9, 0x0a },
{ 0xaa, 0x37 },
{ 0xfd, 0xce },
{ 0x81, 0x18 },
{ 0x82, 0x43 },
{ 0x83, 0x43 },
{ 0x91, 0x06 },
{ 0x93, 0x38 },
{ 0x94, 0x02 },
{ 0x95, 0x06 },
{ 0x97, 0x38 },
{ 0x98, 0x02 },
{ 0x99, 0x06 },
{ 0x9b, 0x38 },
{ 0x9c, 0x02 },
{ 0xfd, 0x00 }, /* Page Shift */
};
static const struct regmap_config ota5601a_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
};
static int ota5601a_prepare(struct drm_panel *drm_panel)
{
struct ota5601a *panel = to_ota5601a(drm_panel);
int err;
err = regulator_enable(panel->supply);
if (err) {
dev_err(drm_panel->dev, "Failed to enable power supply: %d\n", err);
return err;
}
/* Reset to be held low for 10us min according to the doc, 10ms before sending commands */
gpiod_set_value_cansleep(panel->reset_gpio, 1);
usleep_range(10, 30);
gpiod_set_value_cansleep(panel->reset_gpio, 0);
usleep_range(10000, 20000);
/* Init all registers. */
err = regmap_multi_reg_write(panel->map, ota5601a_panel_regs,
ARRAY_SIZE(ota5601a_panel_regs));
if (err) {
dev_err(drm_panel->dev, "Failed to init registers: %d\n", err);
goto err_disable_regulator;
}
msleep(120);
return 0;
err_disable_regulator:
regulator_disable(panel->supply);
return err;
}
static int ota5601a_unprepare(struct drm_panel *drm_panel)
{
struct ota5601a *panel = to_ota5601a(drm_panel);
gpiod_set_value_cansleep(panel->reset_gpio, 1);
regulator_disable(panel->supply);
return 0;
}
static int ota5601a_enable(struct drm_panel *drm_panel)
{
struct ota5601a *panel = to_ota5601a(drm_panel);
int err;
err = regmap_write(panel->map, OTA5601A_CTL, OTA5601A_CTL_ON);
if (err) {
dev_err(drm_panel->dev, "Unable to enable panel: %d\n", err);
return err;
}
if (drm_panel->backlight) {
/* Wait for the picture to be ready before enabling backlight */
msleep(120);
}
return 0;
}
static int ota5601a_disable(struct drm_panel *drm_panel)
{
struct ota5601a *panel = to_ota5601a(drm_panel);
int err;
err = regmap_write(panel->map, OTA5601A_CTL, OTA5601A_CTL_OFF);
if (err) {
dev_err(drm_panel->dev, "Unable to disable panel: %d\n", err);
return err;
}
return 0;
}
static int ota5601a_get_modes(struct drm_panel *drm_panel,
struct drm_connector *connector)
{
struct ota5601a *panel = to_ota5601a(drm_panel);
const struct ota5601a_panel_info *panel_info = panel->panel_info;
struct drm_display_mode *mode;
unsigned int i;
for (i = 0; i < panel_info->num_modes; i++) {
mode = drm_mode_duplicate(connector->dev,
&panel_info->display_modes[i]);
if (!mode)
return -ENOMEM;
drm_mode_set_name(mode);
mode->type = DRM_MODE_TYPE_DRIVER;
if (panel_info->num_modes == 1)
mode->type |= DRM_MODE_TYPE_PREFERRED;
drm_mode_probed_add(connector, mode);
}
connector->display_info.bpc = 8;
connector->display_info.width_mm = panel_info->width_mm;
connector->display_info.height_mm = panel_info->height_mm;
drm_display_info_set_bus_formats(&connector->display_info,
&panel_info->bus_format, 1);
connector->display_info.bus_flags = panel_info->bus_flags;
return panel_info->num_modes;
}
static const struct drm_panel_funcs ota5601a_funcs = {
.prepare = ota5601a_prepare,
.unprepare = ota5601a_unprepare,
.enable = ota5601a_enable,
.disable = ota5601a_disable,
.get_modes = ota5601a_get_modes,
};
static int ota5601a_probe(struct spi_device *spi)
{
const struct spi_device_id *id = spi_get_device_id(spi);
struct device *dev = &spi->dev;
struct ota5601a *panel;
int err;
panel = devm_kzalloc(dev, sizeof(*panel), GFP_KERNEL);
if (!panel)
return -ENOMEM;
spi_set_drvdata(spi, panel);
panel->panel_info = (const struct ota5601a_panel_info *)id->driver_data;
if (!panel->panel_info)
return -EINVAL;
panel->supply = devm_regulator_get(dev, "power");
if (IS_ERR(panel->supply)) {
dev_err(dev, "Failed to get power supply\n");
return PTR_ERR(panel->supply);
}
panel->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(panel->reset_gpio)) {
dev_err(dev, "Failed to get reset GPIO\n");
return PTR_ERR(panel->reset_gpio);
}
spi->bits_per_word = 8;
spi->mode = SPI_MODE_3 | SPI_3WIRE;
err = spi_setup(spi);
if (err) {
dev_err(dev, "Failed to setup SPI\n");
return err;
}
panel->map = devm_regmap_init_spi(spi, &ota5601a_regmap_config);
if (IS_ERR(panel->map)) {
dev_err(dev, "Failed to init regmap\n");
return PTR_ERR(panel->map);
}
drm_panel_init(&panel->drm_panel, dev, &ota5601a_funcs,
DRM_MODE_CONNECTOR_DPI);
err = drm_panel_of_backlight(&panel->drm_panel);
if (err) {
if (err != -EPROBE_DEFER)
dev_err(dev, "Failed to get backlight handle\n");
return err;
}
drm_panel_add(&panel->drm_panel);
return 0;
}
static void ota5601a_remove(struct spi_device *spi)
{
struct ota5601a *panel = spi_get_drvdata(spi);
drm_panel_remove(&panel->drm_panel);
ota5601a_disable(&panel->drm_panel);
ota5601a_unprepare(&panel->drm_panel);
}
static const struct drm_display_mode gpt3_display_modes[] = {
{ /* 60 Hz */
.clock = 27000,
.hdisplay = 640,
.hsync_start = 640 + 220,
.hsync_end = 640 + 220 + 20,
.htotal = 640 + 220 + 20 + 20,
.vdisplay = 480,
.vsync_start = 480 + 7,
.vsync_end = 480 + 7 + 6,
.vtotal = 480 + 7 + 6 + 7,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
},
{ /* 50 Hz */
.clock = 24000,
.hdisplay = 640,
.hsync_start = 640 + 280,
.hsync_end = 640 + 280 + 20,
.htotal = 640 + 280 + 20 + 20,
.vdisplay = 480,
.vsync_start = 480 + 7,
.vsync_end = 480 + 7 + 6,
.vtotal = 480 + 7 + 6 + 7,
.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
},
};
static const struct ota5601a_panel_info gpt3_info = {
.display_modes = gpt3_display_modes,
.num_modes = ARRAY_SIZE(gpt3_display_modes),
.width_mm = 71,
.height_mm = 51,
.bus_format = MEDIA_BUS_FMT_RGB888_1X24,
.bus_flags = DRM_BUS_FLAG_PIXDATA_SAMPLE_POSEDGE,
};
static const struct spi_device_id gpt3_id[] = {
{ "gpt3", (kernel_ulong_t)&gpt3_info },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(spi, gpt3_id);
static const struct of_device_id ota5601a_of_match[] = {
{ .compatible = "focaltech,gpt3" },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, ota5601a_of_match);
static struct spi_driver ota5601a_driver = {
.driver = {
.name = "ota5601a",
.of_match_table = ota5601a_of_match,
},
.id_table = gpt3_id,
.probe = ota5601a_probe,
.remove = ota5601a_remove,
};
module_spi_driver(ota5601a_driver);
MODULE_AUTHOR("Christophe Branchereau <cbranchereau@gmail.com>");
MODULE_LICENSE("GPL");
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