linux-kernel - [PATCH 4.16 136/196] drm/amd/display: HDMI has no sound after Panel power off/on

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Date:   Sun, 22 Apr 2018 15:52:36 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Charlene Liu <charlene.liu@....com>,
        Krunoslav Kovac <Krunoslav.Kovac@....com>,
        Harry Wentland <harry.wentland@....com>,
        Alex Deucher <alexander.deucher@....com>
Subject: [PATCH 4.16 136/196] drm/amd/display: HDMI has no sound after Panel power off/on

4.16-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Charlene Liu <charlene.liu@....com>

commit af2ac326087da632e9580f65205f4cc4205caf85 upstream.

Signed-off-by: Charlene Liu <charlene.liu@....com>
Reviewed-by: Krunoslav Kovac <Krunoslav.Kovac@....com>
Acked-by: Harry Wentland <harry.wentland@....com>
Cc: stable@...r.kernel.org
Signed-off-by: Alex Deucher <alexander.deucher@....com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>

---
 drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c |    2 ++
 1 file changed, 2 insertions(+)

--- a/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_stream_encoder.c
@@ -736,6 +736,8 @@ static void dce110_stream_encoder_update
 		if (info_frame->avi.valid) {
 			const uint32_t *content =
 				(const uint32_t *) &info_frame->avi.sb[0];
+			/*we need turn on clock before programming AFMT block*/
+			REG_UPDATE(AFMT_CNTL, AFMT_AUDIO_CLOCK_EN, 1);
 
 			REG_WRITE(AFMT_AVI_INFO0, content[0]);