[PATCH] drm/radeon/kms: fix regression is handling >2 heads on cedar/caicos

[alexdeuc...@gmail.com]

From: Alex Deucher <alexander.deuc...@amd.com>

Need to add support for 4 crtcs when setting the possible crtcs
for the encoders.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
Cc: stable at kernel.org
---
 drivers/gpu/drm/radeon/radeon_encoders.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/gpu/drm/radeon/radeon_encoders.c 
b/drivers/gpu/drm/radeon/radeon_encoders.c
index 4c4d8e5..39cfef6 100644
--- a/drivers/gpu/drm/radeon/radeon_encoders.c
+++ b/drivers/gpu/drm/radeon/radeon_encoders.c
@@ -2394,6 +2394,9 @@ radeon_add_atom_encoder(struct drm_device *dev,
        default:
                encoder->possible_crtcs = 0x3;
                break;
+       case 4:
+               encoder->possible_crtcs = 0xf;
+               break;
        case 6:
                encoder->possible_crtcs = 0x3f;
                break;
-- 
1.7.1.1