diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-12-09 17:46:59 -0500 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2014-01-09 12:25:11 -0800 |
| commit | 677e753653ae531e38edcfd4c1d61205790655f7 (patch) | |
| tree | 76f7af15a799fdd7d2b7d79522b65585f6a7de46 /drivers/gpu/drm | |
| parent | c9f74a1c0ad7c1be8adc07bfa1a609195628b4d4 (diff) | |
| download | lwn-677e753653ae531e38edcfd4c1d61205790655f7.tar.gz lwn-677e753653ae531e38edcfd4c1d61205790655f7.zip | |
drm/radeon/dpm: disable ss on Cayman
commit c745fe611ca42295c9d91d8e305d27983e9132ef upstream.
Spread spectrum seems to cause hangs when dynamic clock
switching is enabled. Disable it for now. This does not
affect performance or the amount of power saved. Tracked
down by Martin Andersson.
bug:
https://bugs.freedesktop.org/show_bug.cgi?id=69723
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770_dpm.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c index 913b025ae9b3..374499db20c7 100644 --- a/drivers/gpu/drm/radeon/rv770_dpm.c +++ b/drivers/gpu/drm/radeon/rv770_dpm.c @@ -2328,6 +2328,12 @@ void rv770_get_engine_memory_ss(struct radeon_device *rdev) pi->mclk_ss = radeon_atombios_get_asic_ss_info(rdev, &ss, ASIC_INTERNAL_MEMORY_SS, 0); + /* disable ss, causes hangs on some cayman boards */ + if (rdev->family == CHIP_CAYMAN) { + pi->sclk_ss = false; + pi->mclk_ss = false; + } + if (pi->sclk_ss || pi->mclk_ss) pi->dynamic_ss = true; else |