diff options
Diffstat (limited to 'drivers/gpu/drm/radeon/rv770.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/rv770.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/rv770.c b/drivers/gpu/drm/radeon/rv770.c index 82e06e9a76d2..18e02889ec7d 100644 --- a/drivers/gpu/drm/radeon/rv770.c +++ b/drivers/gpu/drm/radeon/rv770.c @@ -1123,6 +1123,35 @@ void r700_cp_fini(struct radeon_device *rdev) radeon_scratch_free(rdev, ring->rptr_save_reg); } +void rv770_set_clk_bypass_mode(struct radeon_device *rdev) +{ + u32 tmp, i; + + if (rdev->flags & RADEON_IS_IGP) + return; + + tmp = RREG32(CG_SPLL_FUNC_CNTL_2); + tmp &= SCLK_MUX_SEL_MASK; + tmp |= SCLK_MUX_SEL(1) | SCLK_MUX_UPDATE; + WREG32(CG_SPLL_FUNC_CNTL_2, tmp); + + for (i = 0; i < rdev->usec_timeout; i++) { + if (RREG32(CG_SPLL_STATUS) & SPLL_CHG_STATUS) + break; + udelay(1); + } + + tmp &= ~SCLK_MUX_UPDATE; + WREG32(CG_SPLL_FUNC_CNTL_2, tmp); + + tmp = RREG32(MPLL_CNTL_MODE); + if ((rdev->family == CHIP_RV710) || (rdev->family == CHIP_RV730)) + tmp &= ~RV730_MPLL_MCLK_SEL; + else + tmp &= ~MPLL_MCLK_SEL; + WREG32(MPLL_CNTL_MODE, tmp); +} + /* * Core functions */ |