drm/radeon: 9800 SE has only one quadpipe

Although these cards have 2 pipelines on the silicon only
the first passed the QA and the other should be disabled.

http://www.digital-daily.com/video/ati-radeon9800se/
http://www.rojakpot.com/showarticle.aspx?artno=101&pgno=1

agd5f: add some other SE cards as well; fix up kms

Signed-off-by: Tormod Volden <debian.tormod@gmail.com>
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

1 files changed, 6 insertions, 0 deletions

diff --git a/drivers/gpu/drm/radeon/r420.c b/drivers/gpu/drm/radeon/r420.c
index 0b8603ca6974..100af6570b09 100644
--- a/drivers/gpu/drm/radeon/r420.c
+++ b/drivers/gpu/drm/radeon/r420.c
@@ -58,6 +58,12 @@ void r420_pipes_init(struct radeon_device *rdev)
         /* get max number of pipes */
         gb_pipe_select = RREG32(0x402C);
         num_pipes = ((gb_pipe_select >> 12) & 3) + 1;
+
+        /* SE chips have 1 pipe */
+        if ((rdev->pdev->device == 0x5e4c) ||
+            (rdev->pdev->device == 0x5e4f))
+                num_pipes = 1;
+
         rdev->num_gb_pipes = num_pipes;
         tmp = 0;
         switch (num_pipes) {