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| author | Slava Grigorev <slava.grigorev@amd.com> | 2016-01-26 16:56:25 -0500 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-01-27 12:48:32 -0500 |
| commit | a64c9dab1c4d05c87ec8a1cb9b48915816462143 (patch) | |
| tree | 374bfa1bb2f03adba7d22642c0dc8b550ad8933c /drivers/gpu/drm/radeon/dce6_afmt.c | |
| parent | c9a392eac18409f51a071520cf508c0b4ad990e2 (diff) | |
| download | linux-a64c9dab1c4d05c87ec8a1cb9b48915816462143.tar.gz linux-a64c9dab1c4d05c87ec8a1cb9b48915816462143.tar.bz2 linux-a64c9dab1c4d05c87ec8a1cb9b48915816462143.zip | |
drm/radeon: Add a common function for DFS handling
Move encoding of DFS (digital frequency synthesizer) divider into a
separate function and improve calculation precision.
Signed-off-by: Slava Grigorev <slava.grigorev@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon/dce6_afmt.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/dce6_afmt.c | 12 |
1 files changed, 2 insertions, 10 deletions
diff --git a/drivers/gpu/drm/radeon/dce6_afmt.c b/drivers/gpu/drm/radeon/dce6_afmt.c index ea4e3fc2744f..367a916f364e 100644 --- a/drivers/gpu/drm/radeon/dce6_afmt.c +++ b/drivers/gpu/drm/radeon/dce6_afmt.c @@ -304,18 +304,10 @@ void dce6_dp_audio_set_dto(struct radeon_device *rdev, unsigned int div = (RREG32(DENTIST_DISPCLK_CNTL) & DENTIST_DPREFCLK_WDIVIDER_MASK) >> DENTIST_DPREFCLK_WDIVIDER_SHIFT; - - if (div < 128 && div >= 96) - div -= 64; - else if (div >= 64) - div = div / 2 - 16; - else if (div >= 8) - div /= 4; - else - div = 0; + div = radeon_audio_decode_dfs_div(div); if (div) - clock /= div; + clock = clock * 100 / div; WREG32(DCE8_DCCG_AUDIO_DTO1_PHASE, 24000); WREG32(DCE8_DCCG_AUDIO_DTO1_MODULE, clock); |