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drm_modes: add drm_display_mode_to_videomode 

Add conversion from drm_display_mode to videomode.

Signed-off-by: Steve Longerbeam <steve_longerbeam@mentor.com>
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
This commit is contained in:
Steve Longerbeam 2014-12-18 18:00:22 -08:00 committed by Philipp Zabel
parent 73099f12b0
commit d490f455f4
2 changed files with 42 additions and 0 deletions
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40
drivers/gpu/drm/drm_modes.c
View File

@ -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

2
include/drm/drm_modes.h
View File

@ -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);