drm/radeon/kms: fix bandwidth calculation when sideport is present

Fixes fdo bug 27529:
https://bugs.freedesktop.org/show_bug.cgi?id=27529

Reported-by: steckdenis@yahoo.fr
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c
index bcc3319..64b94a8 100644 (file)
--- a/drivers/gpu/drm/radeon/rs690.c
+++ b/drivers/gpu/drm/radeon/rs690.c
@@ -228,10 +228,6 @@ void rs690_crtc_bandwidth_compute(struct radeon_device *rdev,
        fixed20_12 a, b, c;
        fixed20_12 pclk, request_fifo_depth, tolerable_latency, estimated_width;
        fixed20_12 consumption_time, line_time, chunk_time, read_delay_latency;
-       /* FIXME: detect IGP with sideport memory, i don't think there is any
-        * such product available
-        */
-       bool sideport = false;
 
        if (!crtc->base.enabled) {
                /* FIXME: wouldn't it better to set priority mark to maximum */
@@ -300,7 +296,7 @@ void rs690_crtc_bandwidth_compute(struct radeon_device *rdev,
 
        /* Maximun bandwidth is the minimun bandwidth of all component */
        rdev->pm.max_bandwidth = rdev->pm.core_bandwidth;
-       if (sideport) {
+       if (rdev->mc.igp_sideport_enabled) {
                if (rdev->pm.max_bandwidth.full > rdev->pm.sideport_bandwidth.full &&
                        rdev->pm.sideport_bandwidth.full)
                        rdev->pm.max_bandwidth = rdev->pm.sideport_bandwidth;