Commit d490f455 authored by Steve Longerbeam's avatar Steve Longerbeam Committed by Philipp Zabel
Browse files

drm_modes: add drm_display_mode_to_videomode 



Add conversion from drm_display_mode to videomode.

Signed-off-by: default avatarSteve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
parent 73099f12

drivers/gpu/drm/drm_modes.c

+40 −0
Original line number Diff line number Diff line
@@ -615,6 +615,46 @@ void drm_display_mode_from_videomode(const struct videomode *vm, 
}

EXPORT_SYMBOL_GPL(drm_display_mode_from_videomode);



/**

 * drm_display_mode_to_videomode - fill in @vm using @dmode,

 * @dmode: drm_display_mode structure to use as source

 * @vm: videomode structure to use as destination

 *

 * Fills out @vm using the display mode specified in @dmode.

 */

void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,

				   struct videomode *vm)

{

	vm->hactive = dmode->hdisplay;

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

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

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



	vm->vactive = dmode->vdisplay;

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

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

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



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



	vm->flags = 0;

	if (dmode->flags & DRM_MODE_FLAG_PHSYNC)

		vm->flags |= DISPLAY_FLAGS_HSYNC_HIGH;

	else if (dmode->flags & DRM_MODE_FLAG_NHSYNC)

		vm->flags |= DISPLAY_FLAGS_HSYNC_LOW;

	if (dmode->flags & DRM_MODE_FLAG_PVSYNC)

		vm->flags |= DISPLAY_FLAGS_VSYNC_HIGH;

	else if (dmode->flags & DRM_MODE_FLAG_NVSYNC)

		vm->flags |= DISPLAY_FLAGS_VSYNC_LOW;

	if (dmode->flags & DRM_MODE_FLAG_INTERLACE)

		vm->flags |= DISPLAY_FLAGS_INTERLACED;

	if (dmode->flags & DRM_MODE_FLAG_DBLSCAN)

		vm->flags |= DISPLAY_FLAGS_DOUBLESCAN;

	if (dmode->flags & DRM_MODE_FLAG_DBLCLK)

		vm->flags |= DISPLAY_FLAGS_DOUBLECLK;

}

EXPORT_SYMBOL_GPL(drm_display_mode_to_videomode);



#ifdef CONFIG_OF

/**

 * of_get_drm_display_mode - get a drm_display_mode from devicetree

include/drm/drm_modes.h

+2 −0
Original line number Diff line number Diff line
@@ -197,6 +197,8 @@ struct drm_display_mode *drm_gtf_mode_complex(struct drm_device *dev, 
					      int GTF_K, int GTF_2J);

void drm_display_mode_from_videomode(const struct videomode *vm,

				     struct drm_display_mode *dmode);

void drm_display_mode_to_videomode(const struct drm_display_mode *dmode,

				   struct videomode *vm);

int of_get_drm_display_mode(struct device_node *np,

			    struct drm_display_mode *dmode,

			    int index);