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| author | Alex Deucher <alexander.deucher@amd.com> | 2013-08-31 00:18:35 +0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-08-31 00:31:24 +0400 |
| commit | 1ff60ddb84bb9ff6fa182710c4e08b66badf918c (patch) | |
| tree | 34a8876fe4c3cebb2915c1a3b36fef9b13014afd /drivers/gpu/drm/radeon/btc_dpm.c | |
| parent | 5b7d245009e734588e553092f5c0b0bd788b3a55 (diff) | |
| download | linux-1ff60ddb84bb9ff6fa182710c4e08b66badf918c.tar.xz | |
drm/radeon/dpm: make sure dc performance level limits are valid (BTC-SI) (v2)
Check to make sure the dc limits are valid before using them.
Some systems may not have a dc limits table. In that case just
use the ac limits. This fixes hangs on systems when the power
state is changed when on battery (dc) due to invalid performance
state parameters.
Should fix:
https://bugs.freedesktop.org/show_bug.cgi?id=68708
v2: fix up limits in dpm_init()
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon/btc_dpm.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/btc_dpm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/btc_dpm.c b/drivers/gpu/drm/radeon/btc_dpm.c index 9953e1fbc46d..084e69414fd1 100644 --- a/drivers/gpu/drm/radeon/btc_dpm.c +++ b/drivers/gpu/drm/radeon/btc_dpm.c @@ -2699,6 +2699,12 @@ int btc_dpm_init(struct radeon_device *rdev) else rdev->pm.dpm.dyn_state.sclk_mclk_delta = 10000; + /* make sure dc limits are valid */ + if ((rdev->pm.dpm.dyn_state.max_clock_voltage_on_dc.sclk == 0) || + (rdev->pm.dpm.dyn_state.max_clock_voltage_on_dc.mclk == 0)) + rdev->pm.dpm.dyn_state.max_clock_voltage_on_dc = + rdev->pm.dpm.dyn_state.max_clock_voltage_on_ac; + return 0; } |