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