drm/radeon/kms: respect single crtc cards, only create one crtc. (v2)

Also add single crtc for RN50 chips.

changes in v2:
fix vblank init to respect single crtc flag
fix r100 mode bandwidth to respect single crtc flag

Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 5 insertions, 3 deletions

diff --git a/drivers/gpu/drm/radeon/r100.c b/drivers/gpu/drm/radeon/r100.c
index 7bea923b1b29..5fe12c02d2dd 100644
--- a/drivers/gpu/drm/radeon/r100.c
+++ b/drivers/gpu/drm/radeon/r100.c
@@ -2135,9 +2135,11 @@ void r100_bandwidth_update(struct radeon_device *rdev)
                 mode1 = &rdev->mode_info.crtcs[0]->base.mode;
                 pixel_bytes1 = rdev->mode_info.crtcs[0]->base.fb->bits_per_pixel / 8;
         }
-        if (rdev->mode_info.crtcs[1]->base.enabled) {
-                mode2 = &rdev->mode_info.crtcs[1]->base.mode;
-                pixel_bytes2 = rdev->mode_info.crtcs[1]->base.fb->bits_per_pixel / 8;
+        if (!(rdev->flags & RADEON_SINGLE_CRTC)) {
+                if (rdev->mode_info.crtcs[1]->base.enabled) {
+                        mode2 = &rdev->mode_info.crtcs[1]->base.mode;
+                        pixel_bytes2 = rdev->mode_info.crtcs[1]->base.fb->bits_per_pixel / 8;
+                }
         }
 
         min_mem_eff.full = rfixed_const_8(0);