drm/radeon/kms/avivo: fix some bugs in the display bandwidth setup
Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c
index 7793239..6aa4ad8 100644
--- a/drivers/gpu/drm/radeon/rv515.c
+++ b/drivers/gpu/drm/radeon/rv515.c
@@ -889,8 +889,9 @@
b.full = rfixed_const(mode->crtc_hdisplay);
c.full = rfixed_const(256);
- a.full = rfixed_mul(wm->num_line_pair, b);
- request_fifo_depth.full = rfixed_div(a, c);
+ a.full = rfixed_div(b, c);
+ request_fifo_depth.full = rfixed_mul(a, wm->num_line_pair);
+ request_fifo_depth.full = rfixed_ceil(request_fifo_depth);
if (a.full < rfixed_const(4)) {
wm->lb_request_fifo_depth = 4;
} else {
@@ -992,15 +993,17 @@
a.full = rfixed_const(16);
wm->priority_mark_max.full = rfixed_const(crtc->base.mode.crtc_hdisplay);
wm->priority_mark_max.full = rfixed_div(wm->priority_mark_max, a);
+ wm->priority_mark_max.full = rfixed_ceil(wm->priority_mark_max);
/* Determine estimated width */
estimated_width.full = tolerable_latency.full - wm->worst_case_latency.full;
estimated_width.full = rfixed_div(estimated_width, consumption_time);
if (rfixed_trunc(estimated_width) > crtc->base.mode.crtc_hdisplay) {
- wm->priority_mark.full = rfixed_const(10);
+ wm->priority_mark.full = wm->priority_mark_max.full;
} else {
a.full = rfixed_const(16);
wm->priority_mark.full = rfixed_div(estimated_width, a);
+ wm->priority_mark.full = rfixed_ceil(wm->priority_mark);
wm->priority_mark.full = wm->priority_mark_max.full - wm->priority_mark.full;
}
}