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#if IS_ENABLED(CONFIG_VIDEOMODE)

int drm_display_mode_from_videomode(const struct videomode *vm,

				    struct drm_display_mode *dmode)

{

	dmode->hdisplay = vm->hactive;

	dmode->hsync_start = dmode->hdisplay + vm->hfront_porch;

	dmode->hsync_end = dmode->hsync_start + vm->hsync_len;

	dmode->htotal = dmode->hsync_end + vm->hback_porch;

	dmode->vdisplay = vm->vactive;

	dmode->vsync_start = dmode->vdisplay + vm->vfront_porch;

	dmode->vsync_end = dmode->vsync_start + vm->vsync_len;

	dmode->vtotal = dmode->vsync_end + vm->vback_porch;

	dmode->clock = vm->pixelclock / 1000;

	dmode->flags = 0;

	if (vm->dmt_flags & VESA_DMT_HSYNC_HIGH)

		dmode->flags |= DRM_MODE_FLAG_PHSYNC;

	else if (vm->dmt_flags & VESA_DMT_HSYNC_LOW)

		dmode->flags |= DRM_MODE_FLAG_NHSYNC;

	if (vm->dmt_flags & VESA_DMT_VSYNC_HIGH)

		dmode->flags |= DRM_MODE_FLAG_PVSYNC;

	else if (vm->dmt_flags & VESA_DMT_VSYNC_LOW)

		dmode->flags |= DRM_MODE_FLAG_NVSYNC;

	if (vm->data_flags & DISPLAY_FLAGS_INTERLACED)

		dmode->flags |= DRM_MODE_FLAG_INTERLACE;

	if (vm->data_flags & DISPLAY_FLAGS_DOUBLESCAN)

		dmode->flags |= DRM_MODE_FLAG_DBLSCAN;

	drm_mode_set_name(dmode);

	return 0;

}

EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);

#endif

#if IS_ENABLED(CONFIG_OF_VIDEOMODE)

/**

 * of_get_drm_display_mode - get a drm_display_mode from devicetree

 * @np: device_node with the timing specification

 * @dmode: will be set to the return value

 * @index: index into the list of display timings in devicetree

 *

 * This function is expensive and should only be used, if only one mode is to be

 * read from DT. To get multiple modes start with of_get_display_timings and

 * work with that instead.

 */

int of_get_drm_display_mode(struct device_node *np,

			    struct drm_display_mode *dmode, int index)

{

	struct videomode vm;

	int ret;

	ret = of_get_videomode(np, &vm, index);

	if (ret)

		return ret;

	drm_display_mode_from_videomode(&vm, dmode);

	pr_debug("%s: got %dx%d display mode from %s\n",

		of_node_full_name(np), vm.hactive, vm.vactive, np->name);

	drm_mode_debug_printmodeline(dmode);

	return 0;

}

EXPORT_SYMBOL_GPL(of_get_drm_display_mode);

#endif