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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/dss/display.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/dss/display.c')
-rw-r--r-- | drivers/video/fbdev/omap2/omapfb/dss/display.c | 327 |
1 files changed, 327 insertions, 0 deletions
diff --git a/drivers/video/fbdev/omap2/omapfb/dss/display.c b/drivers/video/fbdev/omap2/omapfb/dss/display.c new file mode 100644 index 000000000..f91db94c9 --- /dev/null +++ b/drivers/video/fbdev/omap2/omapfb/dss/display.c @@ -0,0 +1,327 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * linux/drivers/video/omap2/dss/display.c + * + * Copyright (C) 2009 Nokia Corporation + * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> + * + * Some code and ideas taken from drivers/video/omap/ driver + * by Imre Deak. + */ + +#define DSS_SUBSYS_NAME "DISPLAY" + +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/jiffies.h> +#include <linux/platform_device.h> +#include <linux/of.h> + +#include <video/omapfb_dss.h> +#include "dss.h" +#include "dss_features.h" + +void omapdss_default_get_resolution(struct omap_dss_device *dssdev, + u16 *xres, u16 *yres) +{ + *xres = dssdev->panel.timings.x_res; + *yres = dssdev->panel.timings.y_res; +} +EXPORT_SYMBOL(omapdss_default_get_resolution); + +int omapdss_default_get_recommended_bpp(struct omap_dss_device *dssdev) +{ + switch (dssdev->type) { + case OMAP_DISPLAY_TYPE_DPI: + if (dssdev->phy.dpi.data_lines == 24) + return 24; + else + return 16; + + case OMAP_DISPLAY_TYPE_DBI: + if (dssdev->ctrl.pixel_size == 24) + return 24; + else + return 16; + case OMAP_DISPLAY_TYPE_DSI: + if (dsi_get_pixel_size(dssdev->panel.dsi_pix_fmt) > 16) + return 24; + else + return 16; + case OMAP_DISPLAY_TYPE_VENC: + case OMAP_DISPLAY_TYPE_SDI: + case OMAP_DISPLAY_TYPE_HDMI: + case OMAP_DISPLAY_TYPE_DVI: + return 24; + default: + BUG(); + return 0; + } +} +EXPORT_SYMBOL(omapdss_default_get_recommended_bpp); + +void omapdss_default_get_timings(struct omap_dss_device *dssdev, + struct omap_video_timings *timings) +{ + *timings = dssdev->panel.timings; +} +EXPORT_SYMBOL(omapdss_default_get_timings); + +int dss_suspend_all_devices(void) +{ + struct omap_dss_device *dssdev = NULL; + + for_each_dss_dev(dssdev) { + if (!dssdev->driver) + continue; + + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) { + dssdev->driver->disable(dssdev); + dssdev->activate_after_resume = true; + } else { + dssdev->activate_after_resume = false; + } + } + + return 0; +} + +int dss_resume_all_devices(void) +{ + struct omap_dss_device *dssdev = NULL; + + for_each_dss_dev(dssdev) { + if (!dssdev->driver) + continue; + + if (dssdev->activate_after_resume) { + dssdev->driver->enable(dssdev); + dssdev->activate_after_resume = false; + } + } + + return 0; +} + +void dss_disable_all_devices(void) +{ + struct omap_dss_device *dssdev = NULL; + + for_each_dss_dev(dssdev) { + if (!dssdev->driver) + continue; + + if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE) + dssdev->driver->disable(dssdev); + } +} + +static LIST_HEAD(panel_list); +static DEFINE_MUTEX(panel_list_mutex); +static int disp_num_counter; + +int omapdss_register_display(struct omap_dss_device *dssdev) +{ + struct omap_dss_driver *drv = dssdev->driver; + int id; + + /* + * Note: this presumes all the displays are either using DT or non-DT, + * which normally should be the case. This also presumes that all + * displays either have an DT alias, or none has. + */ + + if (dssdev->dev->of_node) { + id = of_alias_get_id(dssdev->dev->of_node, "display"); + + if (id < 0) + id = disp_num_counter++; + } else { + id = disp_num_counter++; + } + + snprintf(dssdev->alias, sizeof(dssdev->alias), "display%d", id); + + /* Use 'label' property for name, if it exists */ + if (dssdev->dev->of_node) + of_property_read_string(dssdev->dev->of_node, "label", + &dssdev->name); + + if (dssdev->name == NULL) + dssdev->name = dssdev->alias; + + if (drv && drv->get_resolution == NULL) + drv->get_resolution = omapdss_default_get_resolution; + if (drv && drv->get_recommended_bpp == NULL) + drv->get_recommended_bpp = omapdss_default_get_recommended_bpp; + if (drv && drv->get_timings == NULL) + drv->get_timings = omapdss_default_get_timings; + + mutex_lock(&panel_list_mutex); + list_add_tail(&dssdev->panel_list, &panel_list); + mutex_unlock(&panel_list_mutex); + return 0; +} +EXPORT_SYMBOL(omapdss_register_display); + +void omapdss_unregister_display(struct omap_dss_device *dssdev) +{ + mutex_lock(&panel_list_mutex); + list_del(&dssdev->panel_list); + mutex_unlock(&panel_list_mutex); +} +EXPORT_SYMBOL(omapdss_unregister_display); + +struct omap_dss_device *omap_dss_get_device(struct omap_dss_device *dssdev) +{ + if (!try_module_get(dssdev->owner)) + return NULL; + + if (get_device(dssdev->dev) == NULL) { + module_put(dssdev->owner); + return NULL; + } + + return dssdev; +} +EXPORT_SYMBOL(omap_dss_get_device); + +void omap_dss_put_device(struct omap_dss_device *dssdev) +{ + put_device(dssdev->dev); + module_put(dssdev->owner); +} +EXPORT_SYMBOL(omap_dss_put_device); + +/* + * ref count of the found device is incremented. + * ref count of from-device is decremented. + */ +struct omap_dss_device *omap_dss_get_next_device(struct omap_dss_device *from) +{ + struct list_head *l; + struct omap_dss_device *dssdev; + + mutex_lock(&panel_list_mutex); + + if (list_empty(&panel_list)) { + dssdev = NULL; + goto out; + } + + if (from == NULL) { + dssdev = list_first_entry(&panel_list, struct omap_dss_device, + panel_list); + omap_dss_get_device(dssdev); + goto out; + } + + omap_dss_put_device(from); + + list_for_each(l, &panel_list) { + dssdev = list_entry(l, struct omap_dss_device, panel_list); + if (dssdev == from) { + if (list_is_last(l, &panel_list)) { + dssdev = NULL; + goto out; + } + + dssdev = list_entry(l->next, struct omap_dss_device, + panel_list); + omap_dss_get_device(dssdev); + goto out; + } + } + + WARN(1, "'from' dssdev not found\n"); + + dssdev = NULL; +out: + mutex_unlock(&panel_list_mutex); + return dssdev; +} +EXPORT_SYMBOL(omap_dss_get_next_device); + +struct omap_dss_device *omap_dss_find_device(void *data, + int (*match)(struct omap_dss_device *dssdev, void *data)) +{ + struct omap_dss_device *dssdev = NULL; + + while ((dssdev = omap_dss_get_next_device(dssdev)) != NULL) { + if (match(dssdev, data)) + return dssdev; + } + + return NULL; +} +EXPORT_SYMBOL(omap_dss_find_device); + +void videomode_to_omap_video_timings(const struct videomode *vm, + struct omap_video_timings *ovt) +{ + memset(ovt, 0, sizeof(*ovt)); + + ovt->pixelclock = vm->pixelclock; + ovt->x_res = vm->hactive; + ovt->hbp = vm->hback_porch; + ovt->hfp = vm->hfront_porch; + ovt->hsw = vm->hsync_len; + ovt->y_res = vm->vactive; + ovt->vbp = vm->vback_porch; + ovt->vfp = vm->vfront_porch; + ovt->vsw = vm->vsync_len; + + ovt->vsync_level = vm->flags & DISPLAY_FLAGS_VSYNC_HIGH ? + OMAPDSS_SIG_ACTIVE_HIGH : + OMAPDSS_SIG_ACTIVE_LOW; + ovt->hsync_level = vm->flags & DISPLAY_FLAGS_HSYNC_HIGH ? + OMAPDSS_SIG_ACTIVE_HIGH : + OMAPDSS_SIG_ACTIVE_LOW; + ovt->de_level = vm->flags & DISPLAY_FLAGS_DE_HIGH ? + OMAPDSS_SIG_ACTIVE_HIGH : + OMAPDSS_SIG_ACTIVE_LOW; + ovt->data_pclk_edge = vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE ? + OMAPDSS_DRIVE_SIG_RISING_EDGE : + OMAPDSS_DRIVE_SIG_FALLING_EDGE; + + ovt->sync_pclk_edge = ovt->data_pclk_edge; +} +EXPORT_SYMBOL(videomode_to_omap_video_timings); + +void omap_video_timings_to_videomode(const struct omap_video_timings *ovt, + struct videomode *vm) +{ + memset(vm, 0, sizeof(*vm)); + + vm->pixelclock = ovt->pixelclock; + + vm->hactive = ovt->x_res; + vm->hback_porch = ovt->hbp; + vm->hfront_porch = ovt->hfp; + vm->hsync_len = ovt->hsw; + vm->vactive = ovt->y_res; + vm->vback_porch = ovt->vbp; + vm->vfront_porch = ovt->vfp; + vm->vsync_len = ovt->vsw; + + if (ovt->hsync_level == OMAPDSS_SIG_ACTIVE_HIGH) + vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH; + else + vm->flags |= DISPLAY_FLAGS_HSYNC_LOW; + + if (ovt->vsync_level == OMAPDSS_SIG_ACTIVE_HIGH) + vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH; + else + vm->flags |= DISPLAY_FLAGS_VSYNC_LOW; + + if (ovt->de_level == OMAPDSS_SIG_ACTIVE_HIGH) + vm->flags |= DISPLAY_FLAGS_DE_HIGH; + else + vm->flags |= DISPLAY_FLAGS_DE_LOW; + + if (ovt->data_pclk_edge == OMAPDSS_DRIVE_SIG_RISING_EDGE) + vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE; + else + vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE; +} +EXPORT_SYMBOL(omap_video_timings_to_videomode); |