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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c')
-rw-r--r-- | drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c | 320 |
1 files changed, 320 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c b/drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c new file mode 100644 index 000000000..ff3d1e8e1 --- /dev/null +++ b/drivers/video/fbdev/omap2/omapfb/displays/panel-dpi.c @@ -0,0 +1,320 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Generic MIPI DPI Panel Driver + * + * Copyright (C) 2013 Texas Instruments + * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> + */ + +#include <linux/gpio.h> +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/slab.h> +#include <linux/of.h> +#include <linux/of_gpio.h> + +#include <video/omapfb_dss.h> +#include <video/omap-panel-data.h> +#include <video/of_display_timing.h> + +struct panel_drv_data { + struct omap_dss_device dssdev; + struct omap_dss_device *in; + + int data_lines; + + struct omap_video_timings videomode; + + /* used for non-DT boot, to be removed */ + int backlight_gpio; + + struct gpio_desc *enable_gpio; +}; + +#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) + +static int panel_dpi_connect(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 0; + + return in->ops.dpi->connect(in, dssdev); +} + +static void panel_dpi_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 panel_dpi_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; + + gpiod_set_value_cansleep(ddata->enable_gpio, 1); + + if (gpio_is_valid(ddata->backlight_gpio)) + gpio_set_value_cansleep(ddata->backlight_gpio, 1); + + dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; + + return 0; +} + +static void panel_dpi_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; + + if (gpio_is_valid(ddata->backlight_gpio)) + gpio_set_value_cansleep(ddata->backlight_gpio, 0); + + gpiod_set_value_cansleep(ddata->enable_gpio, 0); + + in->ops.dpi->disable(in); + + dssdev->state = OMAP_DSS_DISPLAY_DISABLED; +} + +static void panel_dpi_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 panel_dpi_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 panel_dpi_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 panel_dpi_ops = { + .connect = panel_dpi_connect, + .disconnect = panel_dpi_disconnect, + + .enable = panel_dpi_enable, + .disable = panel_dpi_disable, + + .set_timings = panel_dpi_set_timings, + .get_timings = panel_dpi_get_timings, + .check_timings = panel_dpi_check_timings, + + .get_resolution = omapdss_default_get_resolution, +}; + +static int panel_dpi_probe_pdata(struct platform_device *pdev) +{ + const struct panel_dpi_platform_data *pdata; + struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct omap_dss_device *dssdev, *in; + struct videomode vm; + int r; + + pdata = dev_get_platdata(&pdev->dev); + + in = omap_dss_find_output(pdata->source); + if (in == NULL) { + dev_err(&pdev->dev, "failed to find video source '%s'\n", + pdata->source); + return -EPROBE_DEFER; + } + + ddata->in = in; + + ddata->data_lines = pdata->data_lines; + + videomode_from_timing(pdata->display_timing, &vm); + videomode_to_omap_video_timings(&vm, &ddata->videomode); + + dssdev = &ddata->dssdev; + dssdev->name = pdata->name; + + r = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio, + GPIOF_OUT_INIT_LOW, "panel enable"); + if (r) + goto err_gpio; + + ddata->enable_gpio = gpio_to_desc(pdata->enable_gpio); + + ddata->backlight_gpio = pdata->backlight_gpio; + + return 0; + +err_gpio: + omap_dss_put_device(ddata->in); + return r; +} + +static int panel_dpi_probe_of(struct platform_device *pdev) +{ + struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct device_node *node = pdev->dev.of_node; + struct omap_dss_device *in; + int r; + struct display_timing timing; + struct videomode vm; + struct gpio_desc *gpio; + + gpio = devm_gpiod_get_optional(&pdev->dev, "enable", GPIOD_OUT_LOW); + if (IS_ERR(gpio)) + return PTR_ERR(gpio); + + ddata->enable_gpio = gpio; + + ddata->backlight_gpio = -ENOENT; + + r = of_get_display_timing(node, "panel-timing", &timing); + if (r) { + dev_err(&pdev->dev, "failed to get video timing\n"); + return r; + } + + videomode_from_timing(&timing, &vm); + videomode_to_omap_video_timings(&vm, &ddata->videomode); + + in = omapdss_of_find_source_for_first_ep(node); + if (IS_ERR(in)) { + dev_err(&pdev->dev, "failed to find video source\n"); + return PTR_ERR(in); + } + + ddata->in = in; + + return 0; +} + +static int panel_dpi_probe(struct platform_device *pdev) +{ + struct panel_drv_data *ddata; + struct omap_dss_device *dssdev; + int r; + + ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL); + if (ddata == NULL) + return -ENOMEM; + + platform_set_drvdata(pdev, ddata); + + if (dev_get_platdata(&pdev->dev)) { + r = panel_dpi_probe_pdata(pdev); + if (r) + return r; + } else if (pdev->dev.of_node) { + r = panel_dpi_probe_of(pdev); + if (r) + return r; + } else { + return -ENODEV; + } + + if (gpio_is_valid(ddata->backlight_gpio)) { + r = devm_gpio_request_one(&pdev->dev, ddata->backlight_gpio, + GPIOF_OUT_INIT_LOW, "panel backlight"); + if (r) + goto err_gpio; + } + + dssdev = &ddata->dssdev; + dssdev->dev = &pdev->dev; + dssdev->driver = &panel_dpi_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(&pdev->dev, "Failed to register panel\n"); + goto err_reg; + } + + return 0; + +err_reg: +err_gpio: + omap_dss_put_device(ddata->in); + return r; +} + +static int __exit panel_dpi_remove(struct platform_device *pdev) +{ + struct panel_drv_data *ddata = platform_get_drvdata(pdev); + struct omap_dss_device *dssdev = &ddata->dssdev; + struct omap_dss_device *in = ddata->in; + + omapdss_unregister_display(dssdev); + + panel_dpi_disable(dssdev); + panel_dpi_disconnect(dssdev); + + omap_dss_put_device(in); + + return 0; +} + +static const struct of_device_id panel_dpi_of_match[] = { + { .compatible = "omapdss,panel-dpi", }, + {}, +}; + +MODULE_DEVICE_TABLE(of, panel_dpi_of_match); + +static struct platform_driver panel_dpi_driver = { + .probe = panel_dpi_probe, + .remove = __exit_p(panel_dpi_remove), + .driver = { + .name = "panel-dpi", + .of_match_table = panel_dpi_of_match, + .suppress_bind_attrs = true, + }, +}; + +module_platform_driver(panel_dpi_driver); + +MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); +MODULE_DESCRIPTION("Generic MIPI DPI Panel Driver"); +MODULE_LICENSE("GPL"); |