drm/radeon: fix DP mode validation

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / radeon / dce6_afmt.c

diff --git a/drivers/gpu/drm/radeon/dce6_afmt.c b/drivers/gpu/drm/radeon/dce6_afmt.c
index 6bfc46369db1b4f8daa02fba453a382e863a3585..367a916f364e94617a1b15fcd7d78cd3f90c8dc6 100644 (file)
--- 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 = rdev->clock.gpupll_outputfreq * 10 / div;
+                       clock = clock * 100 / div;
 
                WREG32(DCE8_DCCG_AUDIO_DTO1_PHASE, 24000);
                WREG32(DCE8_DCCG_AUDIO_DTO1_MODULE, clock);