drm/radeon: fix audio dto programming on DCE4+

We need to set the dto source before setting the
dividers otherwise we may get stability problems
with the dto leading to audio playback problems.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Cc: stable@vger.kernel.org

diff --git a/drivers/gpu/drm/radeon/evergreen_hdmi.c b/drivers/gpu/drm/radeon/evergreen_hdmi.c
index b0d3fb3..bb9ea36 100644 (file)
--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -157,9 +157,9 @@ static void evergreen_audio_set_dto(struct drm_encoder *encoder, u32 clock)
         * number (coefficient of two integer numbers.  DCCG_AUDIO_DTOx_PHASE
         * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
         */
+       WREG32(DCCG_AUDIO_DTO_SOURCE, DCCG_AUDIO_DTO0_SOURCE_SEL(radeon_crtc->crtc_id));
        WREG32(DCCG_AUDIO_DTO0_PHASE, base_rate * 100);
        WREG32(DCCG_AUDIO_DTO0_MODULE, clock * 100);
-       WREG32(DCCG_AUDIO_DTO_SOURCE, DCCG_AUDIO_DTO0_SOURCE_SEL(radeon_crtc->crtc_id));
 }