summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/radeon/rs690.c
diff options
context:
space:
mode:
authorAlex Deucher <alexdeucher@gmail.com>2010-08-02 12:13:46 -0400
committerDave Airlie <airlied@redhat.com>2010-08-04 09:49:20 +1000
commite06b14ee91a2ddefc9a67443a6cd8ee0fa800115 (patch)
tree621e5dc5f78e538ff80a0448a803fb1f3ce93add /drivers/gpu/drm/radeon/rs690.c
parentba4420c224c2808f2661cf8428f43ceef7a73a4a (diff)
drm/radeon/kms: handle the case of no active displays properly in the bandwidth code
Logic was: if (mode0 && mode1) else if (mode0) else Should be: if (mode0 && mode1) else if (mode0) else if (mode1) Otherwise we may end up calculating the priority regs with unitialized values. Fixes: https://bugzilla.kernel.org/show_bug.cgi?id=16492 Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/rs690.c')
-rw-r--r--drivers/gpu/drm/radeon/rs690.c27
1 files changed, 9 insertions, 18 deletions
diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c
index f3a8c9344c6..6fbb874583f 100644
--- a/drivers/gpu/drm/radeon/rs690.c
+++ b/drivers/gpu/drm/radeon/rs690.c
@@ -398,7 +398,9 @@ void rs690_bandwidth_update(struct radeon_device *rdev)
struct drm_display_mode *mode1 = NULL;
struct rs690_watermark wm0;
struct rs690_watermark wm1;
- u32 tmp, d1mode_priority_a_cnt, d2mode_priority_a_cnt;
+ u32 tmp;
+ u32 d1mode_priority_a_cnt = S_006548_D1MODE_PRIORITY_A_OFF(1);
+ u32 d2mode_priority_a_cnt = S_006548_D1MODE_PRIORITY_A_OFF(1);
fixed20_12 priority_mark02, priority_mark12, fill_rate;
fixed20_12 a, b;
@@ -495,10 +497,6 @@ void rs690_bandwidth_update(struct radeon_device *rdev)
d1mode_priority_a_cnt |= S_006548_D1MODE_PRIORITY_A_ALWAYS_ON(1);
d2mode_priority_a_cnt |= S_006D48_D2MODE_PRIORITY_A_ALWAYS_ON(1);
}
- WREG32(R_006548_D1MODE_PRIORITY_A_CNT, d1mode_priority_a_cnt);
- WREG32(R_00654C_D1MODE_PRIORITY_B_CNT, d1mode_priority_a_cnt);
- WREG32(R_006D48_D2MODE_PRIORITY_A_CNT, d2mode_priority_a_cnt);
- WREG32(R_006D4C_D2MODE_PRIORITY_B_CNT, d2mode_priority_a_cnt);
} else if (mode0) {
if (dfixed_trunc(wm0.dbpp) > 64)
a.full = dfixed_mul(wm0.dbpp, wm0.num_line_pair);
@@ -528,13 +526,7 @@ void rs690_bandwidth_update(struct radeon_device *rdev)
d1mode_priority_a_cnt = dfixed_trunc(priority_mark02);
if (rdev->disp_priority == 2)
d1mode_priority_a_cnt |= S_006548_D1MODE_PRIORITY_A_ALWAYS_ON(1);
- WREG32(R_006548_D1MODE_PRIORITY_A_CNT, d1mode_priority_a_cnt);
- WREG32(R_00654C_D1MODE_PRIORITY_B_CNT, d1mode_priority_a_cnt);
- WREG32(R_006D48_D2MODE_PRIORITY_A_CNT,
- S_006D48_D2MODE_PRIORITY_A_OFF(1));
- WREG32(R_006D4C_D2MODE_PRIORITY_B_CNT,
- S_006D4C_D2MODE_PRIORITY_B_OFF(1));
- } else {
+ } else if (mode1) {
if (dfixed_trunc(wm1.dbpp) > 64)
a.full = dfixed_mul(wm1.dbpp, wm1.num_line_pair);
else
@@ -563,13 +555,12 @@ void rs690_bandwidth_update(struct radeon_device *rdev)
d2mode_priority_a_cnt = dfixed_trunc(priority_mark12);
if (rdev->disp_priority == 2)
d2mode_priority_a_cnt |= S_006D48_D2MODE_PRIORITY_A_ALWAYS_ON(1);
- WREG32(R_006548_D1MODE_PRIORITY_A_CNT,
- S_006548_D1MODE_PRIORITY_A_OFF(1));
- WREG32(R_00654C_D1MODE_PRIORITY_B_CNT,
- S_00654C_D1MODE_PRIORITY_B_OFF(1));
- WREG32(R_006D48_D2MODE_PRIORITY_A_CNT, d2mode_priority_a_cnt);
- WREG32(R_006D4C_D2MODE_PRIORITY_B_CNT, d2mode_priority_a_cnt);
}
+
+ WREG32(R_006548_D1MODE_PRIORITY_A_CNT, d1mode_priority_a_cnt);
+ WREG32(R_00654C_D1MODE_PRIORITY_B_CNT, d1mode_priority_a_cnt);
+ WREG32(R_006D48_D2MODE_PRIORITY_A_CNT, d2mode_priority_a_cnt);
+ WREG32(R_006D4C_D2MODE_PRIORITY_B_CNT, d2mode_priority_a_cnt);
}
uint32_t rs690_mc_rreg(struct radeon_device *rdev, uint32_t reg)