From: Alex Deucher <[email protected]> ===================================================================== | This is a commit scheduled for the next v2.6.34 longterm release. | | If you see a problem with using this for longterm, please comment.| =====================================================================
commit e06b14ee91a2ddefc9a67443a6cd8ee0fa800115 upstream. 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 <[email protected]> Signed-off-by: Dave Airlie <[email protected]> Signed-off-by: Paul Gortmaker <[email protected]> --- drivers/gpu/drm/radeon/rs690.c | 27 +++++++++------------------ drivers/gpu/drm/radeon/rv515.c | 23 +++++++++-------------- 2 files changed, 18 insertions(+), 32 deletions(-) diff --git a/drivers/gpu/drm/radeon/rs690.c b/drivers/gpu/drm/radeon/rs690.c index 97e3002..6249cf7 100644 --- a/drivers/gpu/drm/radeon/rs690.c +++ b/drivers/gpu/drm/radeon/rs690.c @@ -400,7 +400,9 @@ 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; @@ -497,10 +499,6 @@ 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 (rfixed_trunc(wm0.dbpp) > 64) a.full = rfixed_mul(wm0.dbpp, wm0.num_line_pair); @@ -530,13 +528,7 @@ void rs690_bandwidth_update(struct radeon_device *rdev) d1mode_priority_a_cnt = rfixed_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 (rfixed_trunc(wm1.dbpp) > 64) a.full = rfixed_mul(wm1.dbpp, wm1.num_line_pair); else @@ -565,13 +557,12 @@ void rs690_bandwidth_update(struct radeon_device *rdev) d2mode_priority_a_cnt = rfixed_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) diff --git a/drivers/gpu/drm/radeon/rv515.c b/drivers/gpu/drm/radeon/rv515.c index 9035121..cf8f27f 100644 --- a/drivers/gpu/drm/radeon/rv515.c +++ b/drivers/gpu/drm/radeon/rv515.c @@ -1017,7 +1017,9 @@ void rv515_bandwidth_avivo_update(struct radeon_device *rdev) struct drm_display_mode *mode1 = NULL; struct rv515_watermark wm0; struct rv515_watermark wm1; - u32 tmp, d1mode_priority_a_cnt, d2mode_priority_a_cnt; + u32 tmp; + u32 d1mode_priority_a_cnt = MODE_PRIORITY_OFF; + u32 d2mode_priority_a_cnt = MODE_PRIORITY_OFF; fixed20_12 priority_mark02, priority_mark12, fill_rate; fixed20_12 a, b; @@ -1091,10 +1093,6 @@ void rv515_bandwidth_avivo_update(struct radeon_device *rdev) d1mode_priority_a_cnt |= MODE_PRIORITY_ALWAYS_ON; d2mode_priority_a_cnt |= MODE_PRIORITY_ALWAYS_ON; } - WREG32(D1MODE_PRIORITY_A_CNT, d1mode_priority_a_cnt); - WREG32(D1MODE_PRIORITY_B_CNT, d1mode_priority_a_cnt); - WREG32(D2MODE_PRIORITY_A_CNT, d2mode_priority_a_cnt); - WREG32(D2MODE_PRIORITY_B_CNT, d2mode_priority_a_cnt); } else if (mode0) { if (rfixed_trunc(wm0.dbpp) > 64) a.full = rfixed_div(wm0.dbpp, wm0.num_line_pair); @@ -1124,11 +1122,7 @@ void rv515_bandwidth_avivo_update(struct radeon_device *rdev) d1mode_priority_a_cnt = rfixed_trunc(priority_mark02); if (rdev->disp_priority == 2) d1mode_priority_a_cnt |= MODE_PRIORITY_ALWAYS_ON; - WREG32(D1MODE_PRIORITY_A_CNT, d1mode_priority_a_cnt); - WREG32(D1MODE_PRIORITY_B_CNT, d1mode_priority_a_cnt); - WREG32(D2MODE_PRIORITY_A_CNT, MODE_PRIORITY_OFF); - WREG32(D2MODE_PRIORITY_B_CNT, MODE_PRIORITY_OFF); - } else { + } else if (mode1) { if (rfixed_trunc(wm1.dbpp) > 64) a.full = rfixed_div(wm1.dbpp, wm1.num_line_pair); else @@ -1157,11 +1151,12 @@ void rv515_bandwidth_avivo_update(struct radeon_device *rdev) d2mode_priority_a_cnt = rfixed_trunc(priority_mark12); if (rdev->disp_priority == 2) d2mode_priority_a_cnt |= MODE_PRIORITY_ALWAYS_ON; - WREG32(D1MODE_PRIORITY_A_CNT, MODE_PRIORITY_OFF); - WREG32(D1MODE_PRIORITY_B_CNT, MODE_PRIORITY_OFF); - WREG32(D2MODE_PRIORITY_A_CNT, d2mode_priority_a_cnt); - WREG32(D2MODE_PRIORITY_B_CNT, d2mode_priority_a_cnt); } + + WREG32(D1MODE_PRIORITY_A_CNT, d1mode_priority_a_cnt); + WREG32(D1MODE_PRIORITY_B_CNT, d1mode_priority_a_cnt); + WREG32(D2MODE_PRIORITY_A_CNT, d2mode_priority_a_cnt); + WREG32(D2MODE_PRIORITY_B_CNT, d2mode_priority_a_cnt); } void rv515_bandwidth_update(struct radeon_device *rdev) -- 1.7.4.4 _______________________________________________ stable mailing list [email protected] http://linux.kernel.org/mailman/listinfo/stable
