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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2016 Google, Inc
* Written by Simon Glass <[email protected]>
*/
#define LOG_CATEGORY UCLASS_PANEL
#include <dm.h>
#include <panel.h>
int panel_enable_backlight(struct udevice *dev)
{
struct panel_ops *ops = panel_get_ops(dev);
if (!ops->enable_backlight)
return -ENOSYS;
return ops->enable_backlight(dev);
}
/**
* panel_set_backlight - Set brightness for the panel backlight
*
* @dev: Panel device containing the backlight to update
* @percent: Brightness value (0=off, 1=min brightness,
* 100=full brightness)
* Return: 0 if OK, -ve on error
*/
int panel_set_backlight(struct udevice *dev, int percent)
{
struct panel_ops *ops = panel_get_ops(dev);
if (!ops->set_backlight)
return -ENOSYS;
return ops->set_backlight(dev, percent);
}
static void drm_mode_to_display_timing(const struct drm_display_mode *mode,
struct display_timing *timing)
{
timing->pixelclock.typ = mode->clock * 1000; /* kHz to Hz */
timing->hactive.typ = mode->hdisplay;
timing->hfront_porch.typ = mode->hsync_start - mode->hdisplay;
timing->hsync_len.typ = mode->hsync_end - mode->hsync_start;
timing->hback_porch.typ = mode->htotal - mode->hsync_end;
timing->vactive.typ = mode->vdisplay;
timing->vfront_porch.typ = mode->vsync_start - mode->vdisplay;
timing->vsync_len.typ = mode->vsync_end - mode->vsync_start;
timing->vback_porch.typ = mode->vtotal - mode->vsync_end;
/* DRM_MODE_FLAG_* defines are already mapped to u-boot DISPLAY_FLAGS */
timing->flags = mode->flags;
}
int panel_get_display_timing(struct udevice *dev,
struct display_timing *timings)
{
struct panel_ops *ops = panel_get_ops(dev);
const struct drm_display_mode *modes;
int ret = -ENOSYS;
if (ops->get_display_timing) {
ret = ops->get_display_timing(dev, timings);
if (ret != -ENODEV)
return ret;
}
if (!ops->get_modes)
return ret;
ret = ops->get_modes(dev, &modes);
if (ret < 0)
return ret;
else if (ret == 0)
return -ENODEV;
drm_mode_to_display_timing(&modes[0], timings);
return 0;
}
UCLASS_DRIVER(panel) = {
.id = UCLASS_PANEL,
.name = "panel",
};
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