Hi Javier.
On Thu, Dec 22, 2022 at 11:38:27PM +0100, Javier Martinez Canillas wrote:
> From: Kamil Trzciński <ayufan@xxxxxxxxx>
>
> The driver is for panels based on the Himax HX8394 controller, such as the
> HannStar HSD060BHW4 720x1440 TFT LCD panel that uses a MIPI-DSI interface.
A few comments/nitpicks in the following.
I have been away for a while, and paged out most of my panel knowledge,
so read it all with that in mind.
In general - very nicely written driver.
Sam
>
> Signed-off-by: Kamil Trzciński <ayufan@xxxxxxxxx>
> Co-developed-by: Ondrej Jirman <megi@xxxxxx>
> Signed-off-by: Ondrej Jirman <megi@xxxxxx>
> Co-developed-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
> Signed-off-by: Javier Martinez Canillas <javierm@xxxxxxxxxx>
> ---
>
> drivers/gpu/drm/panel/Kconfig | 12 +
> drivers/gpu/drm/panel/Makefile | 1 +
> drivers/gpu/drm/panel/panel-himax-hx8394.c | 460 +++++++++++++++++++++
> 3 files changed, 473 insertions(+)
> create mode 100644 drivers/gpu/drm/panel/panel-himax-hx8394.c
>
> diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig
> index 737edcdf9eef..7ee9c83f09a7 100644
> --- a/drivers/gpu/drm/panel/Kconfig
> +++ b/drivers/gpu/drm/panel/Kconfig
> @@ -154,6 +154,18 @@ config DRM_PANEL_FEIYANG_FY07024DI26A30D
> Say Y if you want to enable support for panels based on the
> Feiyang FY07024DI26A30-D MIPI-DSI interface.
>
> +config DRM_PANEL_HIMAX_HX8394
> + tristate "HIMAX HX8394 MIPI-DSI LCD panels"
> + depends on OF
> + depends on DRM_MIPI_DSI
> + depends on BACKLIGHT_CLASS_DEVICE
> + help
> + Say Y if you want to enable support for panels based on the
> + Himax HX8394 controller, such as the HannStar HSD060BHW4
> + 720x1440 TFT LCD panel that uses a MIPI-DSI interface.
> +
> + If M is selected the module will be called panel-himax-hx8394.
> +
> config DRM_PANEL_ILITEK_IL9322
> tristate "Ilitek ILI9322 320x240 QVGA panels"
> depends on OF && SPI
> diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile
> index f8f9d9f6a307..84c01adafd4c 100644
> --- a/drivers/gpu/drm/panel/Makefile
> +++ b/drivers/gpu/drm/panel/Makefile
> @@ -13,6 +13,7 @@ obj-$(CONFIG_DRM_PANEL_EBBG_FT8719) += panel-ebbg-ft8719.o
> obj-$(CONFIG_DRM_PANEL_ELIDA_KD35T133) += panel-elida-kd35t133.o
> obj-$(CONFIG_DRM_PANEL_FEIXIN_K101_IM2BA02) += panel-feixin-k101-im2ba02.o
> obj-$(CONFIG_DRM_PANEL_FEIYANG_FY07024DI26A30D) += panel-feiyang-fy07024di26a30d.o
> +obj-$(CONFIG_DRM_PANEL_HIMAX_HX8394) += panel-himax-hx8394.o
> obj-$(CONFIG_DRM_PANEL_ILITEK_IL9322) += panel-ilitek-ili9322.o
> obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9341) += panel-ilitek-ili9341.o
> obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
> diff --git a/drivers/gpu/drm/panel/panel-himax-hx8394.c b/drivers/gpu/drm/panel/panel-himax-hx8394.c
> new file mode 100644
> index 000000000000..b22eec0674b5
> --- /dev/null
> +++ b/drivers/gpu/drm/panel/panel-himax-hx8394.c
> @@ -0,0 +1,460 @@
> +// SPDX-License-Identifier: GPL-2.0
> +/*
> + * Driver for panels based on Himax HX8394 controller, such as:
> + *
> + * - HannStar HSD060BHW4 5.99" MIPI-DSI panel
> + *
> + * Copyright (C) Kamil Trzciński
Needs year
> + */
> +
> +#include <linux/delay.h>
> +#include <linux/gpio/consumer.h>
> +#include <linux/media-bus-format.h>
> +#include <linux/mod_devicetable.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>
> +#include <linux/regulator/consumer.h>
> +
> +#include <video/display_timing.h>
I do not think this include is used.
> +#include <video/mipi_display.h>
> +
> +#include <drm/drm_mipi_dsi.h>
> +#include <drm/drm_modes.h>
> +#include <drm/drm_panel.h>
> +
> +#define DRV_NAME "panel-himax-hx8394"
> +
> +/* Manufacturer specific commands sent via DSI, listed in HX8394-F datasheet */
> +#define HX8394_CMD_SETSEQUENCE 0xb0
> +#define HX8394_CMD_SETPOWER 0xb1
> +#define HX8394_CMD_SETDISP 0xb2
> +#define HX8394_CMD_SETCYC 0xb4
> +#define HX8394_CMD_SETVCOM 0xb6
> +#define HX8394_CMD_SETTE 0xb7
> +#define HX8394_CMD_SETSENSOR 0xb8
> +#define HX8394_CMD_SETEXTC 0xb9
> +#define HX8394_CMD_SETMIPI 0xba
> +#define HX8394_CMD_SETOTP 0xbb
> +#define HX8394_CMD_SETREGBANK 0xbd
> +#define HX8394_CMD_UNKNOWN1 0xc0
> +#define HX8394_CMD_SETDGCLUT 0xc1
> +#define HX8394_CMD_SETID 0xc3
> +#define HX8394_CMD_SETDDB 0xc4
> +#define HX8394_CMD_UNKNOWN2 0xc6
> +#define HX8394_CMD_SETCABC 0xc9
> +#define HX8394_CMD_SETCABCGAIN 0xca
> +#define HX8394_CMD_SETPANEL 0xcc
> +#define HX8394_CMD_SETOFFSET 0xd2
> +#define HX8394_CMD_SETGIP0 0xd3
> +#define HX8394_CMD_UNKNOWN3 0xd4
> +#define HX8394_CMD_SETGIP1 0xd5
> +#define HX8394_CMD_SETGIP2 0xd6
> +#define HX8394_CMD_SETGPO 0xd6
> +#define HX8394_CMD_SETSCALING 0xdd
> +#define HX8394_CMD_SETIDLE 0xdf
> +#define HX8394_CMD_SETGAMMA 0xe0
> +#define HX8394_CMD_SETCHEMODE_DYN 0xe4
> +#define HX8394_CMD_SETCHE 0xe5
> +#define HX8394_CMD_SETCESEL 0xe6
> +#define HX8394_CMD_SET_SP_CMD 0xe9
> +#define HX8394_CMD_SETREADINDEX 0xfe
> +#define HX8394_CMD_GETSPIREAD 0xff
> +
> +struct hx8394 {
> + struct device *dev;
> + struct drm_panel panel;
> + struct gpio_desc *reset_gpio;
> + struct regulator *vcc;
> + struct regulator *iovcc;
> + bool prepared;
> +
> + const struct hx8394_panel_desc *desc;
> +};
> +
> +struct hx8394_panel_desc {
> + const struct drm_display_mode *mode;
> + unsigned int lanes;
> + unsigned long mode_flags;
> + enum mipi_dsi_pixel_format format;
> + int (*init_sequence)(struct hx8394 *ctx);
> +};
> +
> +static inline struct hx8394 *panel_to_hx8394(struct drm_panel *panel)
> +{
> + return container_of(panel, struct hx8394, panel);
> +}
> +
> +#define dsi_dcs_write_seq(dsi, cmd, seq...) do { \
> + static const u8 d[] = { seq }; \
> + int ret; \
> + ret = mipi_dsi_dcs_write(dsi, cmd, d, ARRAY_SIZE(d)); \
> + if (ret < 0) \
> + return ret; \
> + } while (0)
Use mipi_dsi_dcs_write_seq()
> +
> +static int hsd060bhw4_init_sequence(struct hx8394 *ctx)
> +{
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> +
> + /* 5.19.8 SETEXTC: Set extension command (B9h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETEXTC,
> + 0xff, 0x83, 0x94);
> +
> + /* 5.19.2 SETPOWER: Set power (B1h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER,
> + 0x48, 0x11, 0x71, 0x09, 0x32, 0x24, 0x71, 0x31, 0x55, 0x30);
> +
> + /* 5.19.9 SETMIPI: Set MIPI control (BAh) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETMIPI,
> + 0x63, 0x03, 0x68, 0x6b, 0xb2, 0xc0);
> +
> + /* 5.19.3 SETDISP: Set display related register (B2h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETDISP,
> + 0x00, 0x80, 0x78, 0x0c, 0x07);
> +
> + /* 5.19.4 SETCYC: Set display waveform cycles (B4h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETCYC,
> + 0x12, 0x63, 0x12, 0x63, 0x12, 0x63, 0x01, 0x0c, 0x7c, 0x55,
> + 0x00, 0x3f, 0x12, 0x6b, 0x12, 0x6b, 0x12, 0x6b, 0x01, 0x0c,
> + 0x7c);
> +
> + /* 5.19.19 SETGIP0: Set GIP Option0 (D3h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP0,
> + 0x00, 0x00, 0x00, 0x00, 0x3c, 0x1c, 0x00, 0x00, 0x32, 0x10,
> + 0x09, 0x00, 0x09, 0x32, 0x15, 0xad, 0x05, 0xad, 0x32, 0x00,
> + 0x00, 0x00, 0x00, 0x37, 0x03, 0x0b, 0x0b, 0x37, 0x00, 0x00,
> + 0x00, 0x0c, 0x40);
> +
> + /* 5.19.20 Set GIP Option1 (D5h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP1,
> + 0x19, 0x19, 0x18, 0x18, 0x1b, 0x1b, 0x1a, 0x1a, 0x00, 0x01,
> + 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x20, 0x21, 0x18, 0x18,
> + 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
> + 0x24, 0x25, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
> + 0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
> +
> + /* 5.19.21 Set GIP Option2 (D6h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETGIP2,
> + 0x18, 0x18, 0x19, 0x19, 0x1b, 0x1b, 0x1a, 0x1a, 0x07, 0x06,
> + 0x05, 0x04, 0x03, 0x02, 0x01, 0x00, 0x25, 0x24, 0x18, 0x18,
> + 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
> + 0x21, 0x20, 0x18, 0x18, 0x18, 0x18, 0x18, 0x18,
> + 0x18, 0x18, 0x18, 0x18, 0x18, 0x18);
> +
> + /* 5.19.25 SETGAMMA: Set gamma curve related setting (E0h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETGAMMA,
> + 0x00, 0x04, 0x0c, 0x12, 0x14, 0x18, 0x1a, 0x18, 0x31, 0x3f,
> + 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f, 0x82, 0x7e, 0x8a,
> + 0x99, 0x4a, 0x48, 0x49, 0x4b, 0x4a, 0x4c, 0x4b, 0x7f, 0x00,
> + 0x04, 0x0c, 0x11, 0x13, 0x17, 0x1a, 0x18, 0x31,
> + 0x3f, 0x4d, 0x4c, 0x54, 0x65, 0x6b, 0x70, 0x7f,
> + 0x82, 0x7e, 0x8a, 0x99, 0x4a, 0x48, 0x49, 0x4b,
> + 0x4a, 0x4c, 0x4b, 0x7f);
> +
> + /* 5.19.17 SETPANEL (CCh) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETPANEL, 0x0b);
> +
> + /* Unknown command, not listed in the HX8394-F datasheet */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN1, 0x1f, 0x31);
> +
> + /* 5.19.5 SETVCOM: Set VCOM voltage (B6h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETVCOM,
> + 0x7d, 0x7d);
> +
> + /* Unknown command, not listed in the HX8394-F datasheet */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
> + 0x02);
> +
> + /* 5.19.11 Set register bank (BDh) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK, 0x01);
> +
> + /* 5.19.2 SETPOWER: Set power (B1h) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETPOWER, 0x00);
> +
> + /* 5.19.11 Set register bank (BDh) */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_SETREGBANK, 0x00);
> +
> + /* Unknown command, not listed in the HX8394-F datasheet */
> + dsi_dcs_write_seq(dsi, HX8394_CMD_UNKNOWN3,
> + 0xed);
> +
> + return 0;
> +}
> +
> +static const struct drm_display_mode hsd060bhw4_mode = {
> + .hdisplay = 720,
> + .hsync_start = 720 + 40,
> + .hsync_end = 720 + 40 + 46,
> + .htotal = 720 + 40 + 46 + 40,
> + .vdisplay = 1440,
> + .vsync_start = 1440 + 9,
> + .vsync_end = 1440 + 9 + 7,
> + .vtotal = 1440 + 9 + 7 + 7,
> + .clock = 74250,
> + .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
> + .width_mm = 68,
> + .height_mm = 136,
> +};
> +
> +static const struct hx8394_panel_desc hsd060bhw4_desc = {
> + .mode = &hsd060bhw4_mode,
> + .lanes = 4,
> + .mode_flags = MIPI_DSI_MODE_VIDEO | MIPI_DSI_MODE_VIDEO_BURST,
> + .format = MIPI_DSI_FMT_RGB888,
> + .init_sequence = hsd060bhw4_init_sequence,
> +};
> +
> +static int hx8394_enable(struct drm_panel *panel)
> +{
> + struct hx8394 *ctx = panel_to_hx8394(panel);
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> + int ret;
> +
> + dev_info(ctx->dev, "enable\n");
Drop this - or at least move to debug level
> +
> + ret = ctx->desc->init_sequence(ctx);
> + if (ret) {
> + dev_err(ctx->dev, "Panel init sequence failed: %d\n", ret);
> + return ret;
> + }
> +
> + ret = mipi_dsi_dcs_exit_sleep_mode(dsi);
> + if (ret) {
> + dev_err(ctx->dev, "Failed to exit sleep mode: %d\n", ret);
> + return ret;
> + }
> +
> + /* Panel is operational 120 msec after reset */
> + msleep(120);
> +
> + ret = mipi_dsi_dcs_set_display_on(dsi);
> + if (ret) {
> + dev_err(ctx->dev, "Failed to turn on the display: %d\n", ret);
> + goto sleep_in;
> + }
> +
> + return 0;
> +
> +sleep_in:
> + /* This will probably fail, but let's try orderly power off anyway. */
> + ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
> + if (!ret)
> + msleep(50);
> +
> + return ret;
> +}
> +
> +static int hx8394_disable(struct drm_panel *panel)
> +{
> + struct hx8394 *ctx = panel_to_hx8394(panel);
> + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev);
> + int ret;
> +
> + dev_info(ctx->dev, "disable\n");
debug
> +
> + ret = mipi_dsi_dcs_enter_sleep_mode(dsi);
> + if (ret) {
> + dev_err(ctx->dev, "Failed to enter sleep mode: %d\n", ret);
> + return ret;
> + }
> +
> + msleep(50); /* about 3 frames */
> +
> + return 0;
> +}
> +
> +static int hx8394_unprepare(struct drm_panel *panel)
> +{
> + struct hx8394 *ctx = panel_to_hx8394(panel);
> +
> + if (!ctx->prepared)
> + return 0;
> +
> + dev_info(ctx->dev, "unprepare\n");
debug
> +
> + gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> +
> + regulator_disable(ctx->iovcc);
> + regulator_disable(ctx->vcc);
> +
> + ctx->prepared = false;
> +
> + return 0;
> +}
> +
> +static int hx8394_prepare(struct drm_panel *panel)
> +{
> + struct hx8394 *ctx = panel_to_hx8394(panel);
> + int ret;
> +
> + if (ctx->prepared)
> + return 0;
> +
> + dev_info(ctx->dev, "prepare\n");
debug
> +
> + gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> +
> + ret = regulator_enable(ctx->vcc);
> + if (ret) {
> + dev_err(ctx->dev, "Failed to enable vcc supply: %d\n", ret);
> + return ret;
> + }
> +
> + ret = regulator_enable(ctx->iovcc);
> + if (ret) {
> + dev_err(ctx->dev, "Failed to enable iovcc supply: %d\n", ret);
> + goto disable_vcc;
> + }
> +
> + gpiod_set_value_cansleep(ctx->reset_gpio, 0);
> +
> + msleep(180);
> +
> + ctx->prepared = true;
> +
> + return 0;
> +
> +disable_vcc:
> + gpiod_set_value_cansleep(ctx->reset_gpio, 1);
> + regulator_disable(ctx->vcc);
> + return ret;
> +}
> +
> +static int hx8394_get_modes(struct drm_panel *panel,
> + struct drm_connector *connector)
> +{
> + struct hx8394 *ctx = panel_to_hx8394(panel);
> + struct drm_display_mode *mode;
> +
> + mode = drm_mode_duplicate(connector->dev, ctx->desc->mode);
> + if (!mode) {
> + dev_err(ctx->dev, "Failed to add mode %ux%u@%u\n",
> + ctx->desc->mode->hdisplay, ctx->desc->mode->vdisplay,
> + drm_mode_vrefresh(ctx->desc->mode));
> + return -ENOMEM;
> + }
> +
> + drm_mode_set_name(mode);
> +
> + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
> + connector->display_info.width_mm = mode->width_mm;
> + connector->display_info.height_mm = mode->height_mm;
> + drm_mode_probed_add(connector, mode);
> +
> + return 1;
> +}
> +
> +static const struct drm_panel_funcs hx8394_drm_funcs = {
> + .disable = hx8394_disable,
> + .unprepare = hx8394_unprepare,
> + .prepare = hx8394_prepare,
> + .enable = hx8394_enable,
> + .get_modes = hx8394_get_modes,
> +};
> +
> +static int hx8394_probe(struct mipi_dsi_device *dsi)
> +{
> + struct device *dev = &dsi->dev;
> + struct hx8394 *ctx;
> + int ret;
> +
> + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL);
> + if (!ctx)
> + return -ENOMEM;
> +
> + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
> + if (IS_ERR(ctx->reset_gpio))
> + return dev_err_probe(dev, PTR_ERR(ctx->reset_gpio),
> + "Failed to get reset gpio\n");
> +
> + mipi_dsi_set_drvdata(dsi, ctx);
> +
> + ctx->dev = dev;
> + ctx->desc = of_device_get_match_data(dev);
> +
> + dsi->mode_flags = ctx->desc->mode_flags;
> + dsi->format = ctx->desc->format;
> + dsi->lanes = ctx->desc->lanes;
> +
> + ctx->vcc = devm_regulator_get(dev, "vcc");
> + if (IS_ERR(ctx->vcc))
> + return dev_err_probe(dev, PTR_ERR(ctx->vcc),
> + "Failed to request vcc regulator\n");
> +
> + ctx->iovcc = devm_regulator_get(dev, "iovcc");
> + if (IS_ERR(ctx->iovcc))
> + return dev_err_probe(dev, PTR_ERR(ctx->iovcc),
> + "Failed to request iovcc regulator\n");
> +
> + drm_panel_init(&ctx->panel, dev, &hx8394_drm_funcs,
> + DRM_MODE_CONNECTOR_DSI);
> +
> + ret = drm_panel_of_backlight(&ctx->panel);
> + if (ret)
> + return ret;
> +
> + drm_panel_add(&ctx->panel);
> +
> + ret = mipi_dsi_attach(dsi);
> + if (ret < 0) {
> + dev_err_probe(dev, ret, "mipi_dsi_attach failed\n");
> + drm_panel_remove(&ctx->panel);
> + return ret;
> + }
> +
> + dev_info(dev, "%ux%u@%u %ubpp dsi %udl - ready\n",
> + ctx->desc->mode->hdisplay, ctx->desc->mode->vdisplay,
> + drm_mode_vrefresh(ctx->desc->mode),
> + mipi_dsi_pixel_format_to_bpp(dsi->format), dsi->lanes);
debug
> +
> + return 0;
> +}
> +
> +static void hx8394_shutdown(struct mipi_dsi_device *dsi)
> +{
> + struct hx8394 *ctx = mipi_dsi_get_drvdata(dsi);
> + int ret;
> +
> + ret = drm_panel_disable(&ctx->panel);
> + if (ret < 0)
> + dev_err(&dsi->dev, "Failed to disable panel: %d\n", ret);
> +
> + ret = drm_panel_unprepare(&ctx->panel);
> + if (ret < 0)
> + dev_err(&dsi->dev, "Failed to unprepare panel: %d\n", ret);
> +}
> +
> +static void hx8394_remove(struct mipi_dsi_device *dsi)
> +{
> + struct hx8394 *ctx = mipi_dsi_get_drvdata(dsi);
> + int ret;
> +
> + hx8394_shutdown(dsi);
> +
> + ret = mipi_dsi_detach(dsi);
> + if (ret < 0)
> + dev_err(&dsi->dev, "Failed to detach from DSI host: %d\n", ret);
> +
> + drm_panel_remove(&ctx->panel);
> +}
> +
> +static const struct of_device_id hx8394_of_match[] = {
> + { .compatible = "hannstar,hsd060bhw4", .data = &hsd060bhw4_desc },
> + { /* sentinel */ }
> +};
> +MODULE_DEVICE_TABLE(of, hx8394_of_match);
> +
> +static struct mipi_dsi_driver hx8394_driver = {
> + .probe = hx8394_probe,
> + .remove = hx8394_remove,
> + .shutdown = hx8394_shutdown,
> + .driver = {
> + .name = DRV_NAME,
> + .of_match_table = hx8394_of_match,
> + },
> +};
> +module_mipi_dsi_driver(hx8394_driver);
> +
> +MODULE_AUTHOR("Kamil Trzciński <ayufan@xxxxxxxxx>");
> +MODULE_DESCRIPTION("DRM driver for Himax HX8394 based MIPI DSI panels");
> +MODULE_LICENSE("GPL");
> --
> 2.38.1
