diff options
| author | Alex Deucher <alexdeucher@gmail.com> | 2010-08-02 12:13:46 -0400 |
|---|---|---|
| committer | Dave Airlie <airlied@redhat.com> | 2010-08-04 09:49:20 +1000 |
| commit | e06b14ee91a2ddefc9a67443a6cd8ee0fa800115 (patch) | |
| tree | 621e5dc5f78e538ff80a0448a803fb1f3ce93add /drivers/gpu/drm/radeon/rs690.c | |
| parent | ba4420c224c2808f2661cf8428f43ceef7a73a4a (diff) | |
| download | blackbird-op-linux-e06b14ee91a2ddefc9a67443a6cd8ee0fa800115.tar.gz blackbird-op-linux-e06b14ee91a2ddefc9a67443a6cd8ee0fa800115.zip | |
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.c | 27 |
1 files changed, 9 insertions, 18 deletions
diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c index f3a8c9344c64..6fbb874583f4 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) |
