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Commit adde0f23 authored by Adam Jackson's avatar Adam Jackson Committed by Dave Airlie
Browse files

drm/modes: Fix CVT-R modeline generation 

Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=16651



Signed-off-by: default avatarAdam Jackson <ajax@redhat.com>
Tested-by: default avatarAdam Serbinski <adam@serbinksi.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent 08f2e669

drivers/gpu/drm/drm_modes.c

+4 −1
Original line number Diff line number Diff line
@@ -251,7 +251,10 @@ struct drm_display_mode *drm_cvt_mode(struct drm_device *dev, int hdisplay, 
		drm_mode->htotal = drm_mode->hdisplay + CVT_RB_H_BLANK;

		/* Fill in HSync values */

		drm_mode->hsync_end = drm_mode->hdisplay + CVT_RB_H_BLANK / 2;

		drm_mode->hsync_start = drm_mode->hsync_end = CVT_RB_H_SYNC;

		drm_mode->hsync_start = drm_mode->hsync_end - CVT_RB_H_SYNC;

		/* Fill in VSync values */

		drm_mode->vsync_start = drm_mode->vdisplay + CVT_RB_VFPORCH;

		drm_mode->vsync_end = drm_mode->vsync_start + vsync;

	}

	/* 15/13. Find pixel clock frequency (kHz for xf86) */

	drm_mode->clock = drm_mode->htotal * HV_FACTOR * 1000 / hperiod;