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drm/mode: add the GTF algorithm in kernel space

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Add the GTF algorithm in kernel space. And this function can be called to
generate the required modeline.

I copied it from the file of xserver/hw/xfree86/modes/xf86gtf.c. What I have
done is to translate it by using integer calculation. This is to avoid
the float-point calculation in kernel space.
At the same tie I also refer to the function of fb_get_mode in
drivers/video/fbmon.c

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
This commit is contained in:
Zhao Yakui
2009-06-22 13:17:09 +08:00
committed by Dave Airlie
parent d782c3f95c
commit 26bbdadad3
2 changed files with 200 additions and 0 deletions
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3
include/drm/drm_crtc.h
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@@ -739,4 +739,7 @@ extern bool drm_detect_hdmi_monitor(struct edid *edid);
extern struct drm_display_mode *drm_cvt_mode(struct drm_device *dev,
int hdisplay, int vdisplay, int vrefresh,
bool reduced, bool interlaced);
extern struct drm_display_mode *drm_gtf_mode(struct drm_device *dev,
int hdisplay, int vdisplay, int vrefresh,
bool interlaced, int margins);
#endif /* __DRM_CRTC_H__ */