X-Git-Url: https://gerrit.opnfv.org/gerrit/gitweb?a=blobdiff_plain;ds=sidebyside;f=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fradeon%2Frs690.c;fp=kernel%2Fdrivers%2Fgpu%2Fdrm%2Fradeon%2Frs690.c;h=6bc44c24e837b30e39970f0a74e64eab4be88294;hb=e09b41010ba33a20a87472ee821fa407a5b8da36;hp=516ca27cfa12847e904bd9f8ecb8047db53bdba5;hpb=f93b97fd65072de626c074dbe099a1fff05ce060;p=kvmfornfv.git

diff --git a/kernel/drivers/gpu/drm/radeon/rs690.c b/kernel/drivers/gpu/drm/radeon/rs690.c
index 516ca27cf..6bc44c24e 100644
--- a/kernel/drivers/gpu/drm/radeon/rs690.c
+++ b/kernel/drivers/gpu/drm/radeon/rs690.c
@@ -207,6 +207,9 @@ void rs690_line_buffer_adjust(struct radeon_device *rdev,
 {
 	u32 tmp;
 
+	/* Guess line buffer size to be 8192 pixels */
+	u32 lb_size = 8192;
+
 	/*
 	 * Line Buffer Setup
 	 * There is a single line buffer shared by both display controllers.
@@ -243,6 +246,13 @@ void rs690_line_buffer_adjust(struct radeon_device *rdev,
 		tmp |= V_006520_DC_LB_MEMORY_SPLIT_D1_1Q_D2_3Q;
 	}
 	WREG32(R_006520_DC_LB_MEMORY_SPLIT, tmp);
+
+	/* Save number of lines the linebuffer leads before the scanout */
+	if (mode1)
+		rdev->mode_info.crtcs[0]->lb_vblank_lead_lines = DIV_ROUND_UP(lb_size, mode1->crtc_hdisplay);
+
+	if (mode2)
+		rdev->mode_info.crtcs[1]->lb_vblank_lead_lines = DIV_ROUND_UP(lb_size, mode2->crtc_hdisplay);
 }
 
 struct rs690_watermark {