diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_clocks.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_clocks.c | 23 |
1 files changed, 21 insertions, 2 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_clocks.c b/drivers/gpu/drm/radeon/radeon_clocks.c index a81354167621..b062109efbee 100644 --- a/drivers/gpu/drm/radeon/radeon_clocks.c +++ b/drivers/gpu/drm/radeon/radeon_clocks.c @@ -44,6 +44,10 @@ uint32_t radeon_legacy_get_engine_clock(struct radeon_device *rdev) ref_div = RREG32_PLL(RADEON_M_SPLL_REF_FB_DIV) & RADEON_M_SPLL_REF_DIV_MASK; + + if (ref_div == 0) + return 0; + sclk = fb_div / ref_div; post_div = RREG32_PLL(RADEON_SCLK_CNTL) & RADEON_SCLK_SRC_SEL_MASK; @@ -70,6 +74,10 @@ static uint32_t radeon_legacy_get_memory_clock(struct radeon_device *rdev) ref_div = RREG32_PLL(RADEON_M_SPLL_REF_FB_DIV) & RADEON_M_SPLL_REF_DIV_MASK; + + if (ref_div == 0) + return 0; + mclk = fb_div / ref_div; post_div = RREG32_PLL(RADEON_MCLK_CNTL) & 0x7; @@ -98,8 +106,19 @@ void radeon_get_clock_info(struct drm_device *dev) ret = radeon_combios_get_clock_info(dev); if (ret) { - if (p1pll->reference_div < 2) - p1pll->reference_div = 12; + if (p1pll->reference_div < 2) { + if (!ASIC_IS_AVIVO(rdev)) { + u32 tmp = RREG32_PLL(RADEON_PPLL_REF_DIV); + if (ASIC_IS_R300(rdev)) + p1pll->reference_div = + (tmp & R300_PPLL_REF_DIV_ACC_MASK) >> R300_PPLL_REF_DIV_ACC_SHIFT; + else + p1pll->reference_div = tmp & RADEON_PPLL_REF_DIV_MASK; + if (p1pll->reference_div < 2) + p1pll->reference_div = 12; + } else + p1pll->reference_div = 12; + } if (p2pll->reference_div < 2) p2pll->reference_div = 12; if (rdev->family < CHIP_RS600) { |