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| author | Slava Grigorev <slava.grigorev@amd.com> | 2016-01-27 00:56:25 +0300 |
|---|---|---|
| committer | Alex Deucher <alexander.deucher@amd.com> | 2016-01-27 20:48:32 +0300 |
| commit | a64c9dab1c4d05c87ec8a1cb9b48915816462143 (patch) | |
| tree | 374bfa1bb2f03adba7d22642c0dc8b550ad8933c /drivers/gpu/drm/radeon/radeon_audio.c | |
| parent | c9a392eac18409f51a071520cf508c0b4ad990e2 (diff) | |
| download | linux-a64c9dab1c4d05c87ec8a1cb9b48915816462143.tar.xz | |
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/radeon_audio.c')
| -rw-r--r-- | drivers/gpu/drm/radeon/radeon_audio.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_audio.c b/drivers/gpu/drm/radeon/radeon_audio.c index 85e1c234f020..b214663b370d 100644 --- a/drivers/gpu/drm/radeon/radeon_audio.c +++ b/drivers/gpu/drm/radeon/radeon_audio.c @@ -775,3 +775,15 @@ void radeon_audio_dpms(struct drm_encoder *encoder, int mode) if (radeon_encoder->audio && radeon_encoder->audio->dpms) radeon_encoder->audio->dpms(encoder, mode == DRM_MODE_DPMS_ON); } + +unsigned int radeon_audio_decode_dfs_div(unsigned int div) +{ + if (div >= 8 && div < 64) + return (div - 8) * 25 + 200; + else if (div >= 64 && div < 96) + return (div - 64) * 50 + 1600; + else if (div >= 96 && div < 128) + return (div - 96) * 100 + 3200; + else + return 0; +} |