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linux-stable-mirror/drivers/gpu/drm/tiny/ili9341.c
T
Maxime RipardandDave Airlie 5164f7e7ff drm: Rename struct drm_atomic_state to drm_atomic_commit 
The KMS framework uses two slightly different definitions for the state
concept. For a given object (plane, CRTC, encoder, etc., so
drm_$OBJECT_state), the state is the entire state of that object.
However, at the device level, drm_atomic_state refers to a state update
for a limited number of objects.

Thus, drm_atomic_state isn't the entire device state, but only the full
state of some objects in that device. This has been an endless source of
confusion and thus bugs.

We can rename the drm_atomic_state structure to drm_atomic_commit to
make it less confusing.

This patch was created using:

rg -l drm_atomic_state | \
	xargs sed -i 's/drm_atomic_state/drm_atomic_commit/g; s/drm_atomic_commit_helper/drm_atomic_state_helper/g'
mv drivers/gpu/drm/tests/drm_atomic_state_test.c drivers/gpu/drm/tests/drm_atomic_commit_test.c

Acked-by: Simona Vetter <simona.vetter@ffwll.ch>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
Acked-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Tested-by: Luca Ceresoli <luca.ceresoli@bootlin.com>
Signed-off-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Dave Airlie <airlied@redhat.com>
Link: https://patch.msgid.link/20260427-drm-drm-atomic-update-v4-1-c0e713bfdf25@kernel.org
2026-05-04 14:05:04 +10:00

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// SPDX-License-Identifier: GPL-2.0+
/*
* DRM driver for Ilitek ILI9341 panels
*
* Copyright 2018 David Lechner <david@lechnology.com>
*
* Based on mi0283qt.c:
* Copyright 2016 Noralf Trønnes
*/
#include <linux/backlight.h>
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/property.h>
#include <linux/spi/spi.h>
#include <drm/clients/drm_client_setup.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_drv.h>
#include <drm/drm_fbdev_dma.h>
#include <drm/drm_gem_atomic_helper.h>
#include <drm/drm_gem_dma_helper.h>
#include <drm/drm_managed.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_modeset_helper.h>
#include <drm/drm_print.h>
#include <video/mipi_display.h>
#define ILI9341_FRMCTR1 0xb1
#define ILI9341_DISCTRL 0xb6
#define ILI9341_ETMOD 0xb7
#define ILI9341_PWCTRL1 0xc0
#define ILI9341_PWCTRL2 0xc1
#define ILI9341_VMCTRL1 0xc5
#define ILI9341_VMCTRL2 0xc7
#define ILI9341_PWCTRLA 0xcb
#define ILI9341_PWCTRLB 0xcf
#define ILI9341_PGAMCTRL 0xe0
#define ILI9341_NGAMCTRL 0xe1
#define ILI9341_DTCTRLA 0xe8
#define ILI9341_DTCTRLB 0xea
#define ILI9341_PWRSEQ 0xed
#define ILI9341_EN3GAM 0xf2
#define ILI9341_PUMPCTRL 0xf7
#define ILI9341_MADCTL_BGR BIT(3)
#define ILI9341_MADCTL_MV BIT(5)
#define ILI9341_MADCTL_MX BIT(6)
#define ILI9341_MADCTL_MY BIT(7)
struct ili9341_device {
struct mipi_dbi_dev dbidev;
struct drm_plane plane;
struct drm_crtc crtc;
struct drm_encoder encoder;
struct drm_connector connector;
};
static struct ili9341_device *to_ili9341_device(struct drm_device *dev)
{
return container_of(drm_to_mipi_dbi_dev(dev), struct ili9341_device, dbidev);
}
static const u32 ili9341_plane_formats[] = {
DRM_MIPI_DBI_PLANE_FORMATS,
};
static const u64 ili9341_plane_format_modifiers[] = {
DRM_MIPI_DBI_PLANE_FORMAT_MODIFIERS,
};
static const struct drm_plane_helper_funcs ili9341_plane_helper_funcs = {
DRM_MIPI_DBI_PLANE_HELPER_FUNCS,
};
static const struct drm_plane_funcs ili9341_plane_funcs = {
DRM_MIPI_DBI_PLANE_FUNCS,
.destroy = drm_plane_cleanup,
};
static void ili9341_crtc_helper_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_commit *state)
{
struct drm_device *drm = crtc->dev;
struct ili9341_device *ili9341 = to_ili9341_device(drm);
struct mipi_dbi_dev *dbidev = &ili9341->dbidev;
struct mipi_dbi *dbi = &dbidev->dbi;
u8 addr_mode;
int ret, idx;
if (!drm_dev_enter(drm, &idx))
return;
DRM_DEBUG_KMS("\n");
ret = mipi_dbi_poweron_conditional_reset(dbidev);
if (ret < 0)
goto out_exit;
if (ret == 1)
goto out_enable;
mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_OFF);
mipi_dbi_command(dbi, ILI9341_PWCTRLB, 0x00, 0xc1, 0x30);
mipi_dbi_command(dbi, ILI9341_PWRSEQ, 0x64, 0x03, 0x12, 0x81);
mipi_dbi_command(dbi, ILI9341_DTCTRLA, 0x85, 0x00, 0x78);
mipi_dbi_command(dbi, ILI9341_PWCTRLA, 0x39, 0x2c, 0x00, 0x34, 0x02);
mipi_dbi_command(dbi, ILI9341_PUMPCTRL, 0x20);
mipi_dbi_command(dbi, ILI9341_DTCTRLB, 0x00, 0x00);
/* Power Control */
mipi_dbi_command(dbi, ILI9341_PWCTRL1, 0x23);
mipi_dbi_command(dbi, ILI9341_PWCTRL2, 0x10);
/* VCOM */
mipi_dbi_command(dbi, ILI9341_VMCTRL1, 0x3e, 0x28);
mipi_dbi_command(dbi, ILI9341_VMCTRL2, 0x86);
/* Memory Access Control */
mipi_dbi_command(dbi, MIPI_DCS_SET_PIXEL_FORMAT, MIPI_DCS_PIXEL_FMT_16BIT);
/* Frame Rate */
mipi_dbi_command(dbi, ILI9341_FRMCTR1, 0x00, 0x1b);
/* Gamma */
mipi_dbi_command(dbi, ILI9341_EN3GAM, 0x00);
mipi_dbi_command(dbi, MIPI_DCS_SET_GAMMA_CURVE, 0x01);
mipi_dbi_command(dbi, ILI9341_PGAMCTRL,
0x0f, 0x31, 0x2b, 0x0c, 0x0e, 0x08, 0x4e, 0xf1,
0x37, 0x07, 0x10, 0x03, 0x0e, 0x09, 0x00);
mipi_dbi_command(dbi, ILI9341_NGAMCTRL,
0x00, 0x0e, 0x14, 0x03, 0x11, 0x07, 0x31, 0xc1,
0x48, 0x08, 0x0f, 0x0c, 0x31, 0x36, 0x0f);
/* DDRAM */
mipi_dbi_command(dbi, ILI9341_ETMOD, 0x07);
/* Display */
mipi_dbi_command(dbi, ILI9341_DISCTRL, 0x08, 0x82, 0x27, 0x00);
mipi_dbi_command(dbi, MIPI_DCS_EXIT_SLEEP_MODE);
msleep(100);
mipi_dbi_command(dbi, MIPI_DCS_SET_DISPLAY_ON);
msleep(100);
out_enable:
switch (dbidev->rotation) {
default:
addr_mode = ILI9341_MADCTL_MX;
break;
case 90:
addr_mode = ILI9341_MADCTL_MV;
break;
case 180:
addr_mode = ILI9341_MADCTL_MY;
break;
case 270:
addr_mode = ILI9341_MADCTL_MV | ILI9341_MADCTL_MY |
ILI9341_MADCTL_MX;
break;
}
addr_mode |= ILI9341_MADCTL_BGR;
mipi_dbi_command(dbi, MIPI_DCS_SET_ADDRESS_MODE, addr_mode);
backlight_enable(dbidev->backlight);
out_exit:
drm_dev_exit(idx);
}
static const struct drm_crtc_helper_funcs ili9341_crtc_helper_funcs = {
DRM_MIPI_DBI_CRTC_HELPER_FUNCS,
.atomic_enable = ili9341_crtc_helper_atomic_enable,
};
static const struct drm_crtc_funcs ili9341_crtc_funcs = {
DRM_MIPI_DBI_CRTC_FUNCS,
.destroy = drm_crtc_cleanup,
};
static const struct drm_encoder_funcs ili9341_encoder_funcs = {
.destroy = drm_encoder_cleanup,
};
static const struct drm_connector_helper_funcs ili9341_connector_helper_funcs = {
DRM_MIPI_DBI_CONNECTOR_HELPER_FUNCS,
};
static const struct drm_connector_funcs ili9341_connector_funcs = {
DRM_MIPI_DBI_CONNECTOR_FUNCS,
.destroy = drm_connector_cleanup,
};
static const struct drm_mode_config_helper_funcs ili9341_mode_config_helper_funcs = {
DRM_MIPI_DBI_MODE_CONFIG_HELPER_FUNCS,
};
static const struct drm_mode_config_funcs ili9341_mode_config_funcs = {
DRM_MIPI_DBI_MODE_CONFIG_FUNCS,
};
static const struct drm_display_mode yx240qv29_mode = {
DRM_SIMPLE_MODE(240, 320, 37, 49),
};
DEFINE_DRM_GEM_DMA_FOPS(ili9341_fops);
static const struct drm_driver ili9341_driver = {
.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
.fops = &ili9341_fops,
DRM_GEM_DMA_DRIVER_OPS_VMAP,
DRM_FBDEV_DMA_DRIVER_OPS,
.debugfs_init = mipi_dbi_debugfs_init,
.name = "ili9341",
.desc = "Ilitek ILI9341",
.major = 1,
.minor = 0,
};
static const struct of_device_id ili9341_of_match[] = {
{ .compatible = "adafruit,yx240qv29" },
{ }
};
MODULE_DEVICE_TABLE(of, ili9341_of_match);
static const struct spi_device_id ili9341_id[] = {
{ "yx240qv29", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, ili9341_id);
static int ili9341_probe(struct spi_device *spi)
{
struct device *dev = &spi->dev;
struct ili9341_device *ili9341;
struct mipi_dbi_dev *dbidev;
struct drm_device *drm;
struct mipi_dbi *dbi;
struct gpio_desc *dc;
struct drm_plane *plane;
struct drm_crtc *crtc;
struct drm_encoder *encoder;
struct drm_connector *connector;
u32 rotation = 0;
int ret;
ili9341 = devm_drm_dev_alloc(dev, &ili9341_driver, struct ili9341_device, dbidev.drm);
if (IS_ERR(ili9341))
return PTR_ERR(ili9341);
dbidev = &ili9341->dbidev;
dbi = &dbidev->dbi;
drm = &dbidev->drm;
dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(dbi->reset))
return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
if (IS_ERR(dc))
return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");
dbidev->backlight = devm_of_find_backlight(dev);
if (IS_ERR(dbidev->backlight))
return PTR_ERR(dbidev->backlight);
device_property_read_u32(dev, "rotation", &rotation);
ret = mipi_dbi_spi_init(spi, dbi, dc);
if (ret)
return ret;
ret = drm_mipi_dbi_dev_init(dbidev, &yx240qv29_mode, ili9341_plane_formats[0],
rotation, 0);
if (ret)
return ret;
ret = drmm_mode_config_init(drm);
if (ret)
return ret;
drm->mode_config.min_width = dbidev->mode.hdisplay;
drm->mode_config.max_width = dbidev->mode.hdisplay;
drm->mode_config.min_height = dbidev->mode.vdisplay;
drm->mode_config.max_height = dbidev->mode.vdisplay;
drm->mode_config.funcs = &ili9341_mode_config_funcs;
drm->mode_config.preferred_depth = 16;
drm->mode_config.helper_private = &ili9341_mode_config_helper_funcs;
plane = &ili9341->plane;
ret = drm_universal_plane_init(drm, plane, 0, &ili9341_plane_funcs,
ili9341_plane_formats, ARRAY_SIZE(ili9341_plane_formats),
ili9341_plane_format_modifiers,
DRM_PLANE_TYPE_PRIMARY, NULL);
if (ret)
return ret;
drm_plane_helper_add(plane, &ili9341_plane_helper_funcs);
drm_plane_enable_fb_damage_clips(plane);
crtc = &ili9341->crtc;
ret = drm_crtc_init_with_planes(drm, crtc, plane, NULL, &ili9341_crtc_funcs, NULL);
if (ret)
return ret;
drm_crtc_helper_add(crtc, &ili9341_crtc_helper_funcs);
encoder = &ili9341->encoder;
ret = drm_encoder_init(drm, encoder, &ili9341_encoder_funcs, DRM_MODE_ENCODER_NONE, NULL);
if (ret)
return ret;
encoder->possible_crtcs = drm_crtc_mask(crtc);
connector = &ili9341->connector;
ret = drm_connector_init(drm, connector, &ili9341_connector_funcs,
DRM_MODE_CONNECTOR_SPI);
if (ret)
return ret;
drm_connector_helper_add(connector, &ili9341_connector_helper_funcs);
ret = drm_connector_attach_encoder(connector, encoder);
if (ret)
return ret;
drm_mode_config_reset(drm);
ret = drm_dev_register(drm, 0);
if (ret)
return ret;
spi_set_drvdata(spi, drm);
drm_client_setup(drm, NULL);
return 0;
}
static void ili9341_remove(struct spi_device *spi)
{
struct drm_device *drm = spi_get_drvdata(spi);
drm_dev_unplug(drm);
drm_atomic_helper_shutdown(drm);
}
static void ili9341_shutdown(struct spi_device *spi)
{
drm_atomic_helper_shutdown(spi_get_drvdata(spi));
}
static struct spi_driver ili9341_spi_driver = {
.driver = {
.name = "ili9341",
.of_match_table = ili9341_of_match,
},
.id_table = ili9341_id,
.probe = ili9341_probe,
.remove = ili9341_remove,
.shutdown = ili9341_shutdown,
};
module_spi_driver(ili9341_spi_driver);
MODULE_DESCRIPTION("Ilitek ILI9341 DRM driver");
MODULE_AUTHOR("David Lechner <david@lechnology.com>");
MODULE_LICENSE("GPL");
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