drm/radeon: properly set dto for dp on DCE4/5

If DCPLL or ext PLL is used, use the disp clk.  If
PPLL is used, use the dp clock.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/radeon/evergreen_hdmi.c

@@ -294,7 +294,7 @@ void dce4_dp_audio_set_dto(struct radeon_device *rdev,
 	 * is the numerator, DCCG_AUDIO_DTOx_MODULE is the denominator
 	 */
 	WREG32(DCCG_AUDIO_DTO1_PHASE, 24000);
-	WREG32(DCCG_AUDIO_DTO1_MODULE, rdev->clock.max_pixel_clock * 10);
+	WREG32(DCCG_AUDIO_DTO1_MODULE, clock);
 }
 
 void dce4_set_vbi_packet(struct drm_encoder *encoder, u32 offset)

drivers/gpu/drm/radeon/radeon_audio.c

@@ -724,6 +724,10 @@ static void radeon_audio_dp_mode_set(struct drm_encoder *encoder,
 	struct radeon_device *rdev = dev->dev_private;
 	struct radeon_encoder *radeon_encoder = to_radeon_encoder(encoder);
 	struct radeon_encoder_atom_dig *dig = radeon_encoder->enc_priv;
+	struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
+	struct radeon_connector *radeon_connector = to_radeon_connector(connector);
+	struct radeon_connector_atom_dig *dig_connector =
+		radeon_connector->con_priv;
 
 	if (!dig || !dig->afmt)
 		return;
@@ -731,7 +735,10 @@ static void radeon_audio_dp_mode_set(struct drm_encoder *encoder,
 	radeon_audio_write_speaker_allocation(encoder);
 	radeon_audio_write_sad_regs(encoder);
 	radeon_audio_write_latency_fields(encoder, mode);
+	if (rdev->clock.dp_extclk || ASIC_IS_DCE5(rdev))
 		radeon_audio_set_dto(encoder, rdev->clock.default_dispclk * 10);
+	else
+		radeon_audio_set_dto(encoder, dig_connector->dp_clock);
 	radeon_audio_set_audio_packet(encoder);
 	radeon_audio_select_pin(encoder);