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drm/radeon/dpm: fix spread spectrum setup (v2)

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Need to check for engine and memory clock ss separately
and only enable dynamic ss if either of them are found.

This should fix systems which have a ss table, but do
not have entries for engine or memory.  On those systems
we may enable dynamic spread spectrum without enabling
it on the engine or memory clocks which can lead to a
hang in some cases.

fixes some systems reported here:
https://bugs.freedesktop.org/show_bug.cgi?id=66963

v2: fix typo

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher
2013-07-31 18:32:33 -04:00
parent fda837241f
commit b841ce7b41
7 changed files with 30 additions and 76 deletions
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14
drivers/gpu/drm/radeon/cypress_dpm.c
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@@ -2038,9 +2038,6 @@ int cypress_dpm_init(struct radeon_device *rdev)
{
struct rv7xx_power_info *pi;
struct evergreen_power_info *eg_pi;
int index = GetIndexIntoMasterTable(DATA, ASIC_InternalSS_Info);
uint16_t data_offset, size;
uint8_t frev, crev;
struct atom_clock_dividers dividers;
int ret;
@@ -2092,16 +2089,7 @@ int cypress_dpm_init(struct radeon_device *rdev)
eg_pi->vddci_control =
radeon_atom_is_voltage_gpio(rdev, SET_VOLTAGE_TYPE_ASIC_VDDCI, 0);
if (atom_parse_data_header(rdev->mode_info.atom_context, index, &size,
&frev, &crev, &data_offset)) {
pi->sclk_ss = true;
pi->mclk_ss = true;
pi->dynamic_ss = true;
} else {
pi->sclk_ss = false;
pi->mclk_ss = false;
pi->dynamic_ss = true;
}
rv770_get_engine_memory_ss(rdev);
pi->asi = RV770_ASI_DFLT;
pi->pasi = CYPRESS_HASI_DFLT;