diff options
| author | Alex Deucher <alexander.deucher@amd.com> | 2013-04-09 13:32:18 -0400 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2013-06-26 16:11:48 -0400 |
| commit | 2c67912c439ca501c7a23d69183bf71eab167d35 (patch) | |
| tree | eb14046b6d7c800f222679e180191b66b8935201 /drivers/gpu/drm/radeon/cik.c | |
| parent | 1d5d0c349790b66fcd338f0b5ce04b9aa7483118 (diff) | |
drm/radeon: add get_xclk() callback for CIK
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/cik.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/cik.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/cik.c b/drivers/gpu/drm/radeon/cik.c index cbfb028ac53..445f497c7fc 100644 --- a/drivers/gpu/drm/radeon/cik.c +++ b/drivers/gpu/drm/radeon/cik.c @@ -78,6 +78,28 @@ extern void si_rlc_fini(struct radeon_device *rdev); extern int si_rlc_init(struct radeon_device *rdev); static void cik_rlc_stop(struct radeon_device *rdev); +/** + * cik_get_xclk - get the xclk + * + * @rdev: radeon_device pointer + * + * Returns the reference clock used by the gfx engine + * (CIK). + */ +u32 cik_get_xclk(struct radeon_device *rdev) +{ + u32 reference_clock = rdev->clock.spll.reference_freq; + + if (rdev->flags & RADEON_IS_IGP) { + if (RREG32_SMC(GENERAL_PWRMGT) & GPU_COUNTER_CLK) + return reference_clock / 2; + } else { + if (RREG32_SMC(CG_CLKPIN_CNTL) & XTALIN_DIVIDE) + return reference_clock / 4; + } + return reference_clock; +} + #define BONAIRE_IO_MC_REGS_SIZE 36 static const u32 bonaire_io_mc_regs[BONAIRE_IO_MC_REGS_SIZE][2] = |