Patch "drm/radeon/audio: don't enable packets until the end" has been added to the 4.0-stable tree

[<gregkh@linuxfoundation.org>]

This is a note to let you know that I've just added the patch titled

    drm/radeon/audio: don't enable packets until the end

to the 4.0-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     drm-radeon-audio-don-t-enable-packets-until-the-end.patch
and it can be found in the queue-4.0 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@vger.kernel.org> know about it.


>From 362ff251390f3d1f8fe94666f4fc4e5876381114 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 31 Mar 2015 11:43:12 -0400
Subject: drm/radeon/audio: don't enable packets until the end

From: Alex Deucher <alexander.deucher@amd.com>

commit 362ff251390f3d1f8fe94666f4fc4e5876381114 upstream.

Don't enable the audio and avi infoframes and audio stream
until all the state is set up.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/gpu/drm/radeon/evergreen_hdmi.c |   30 +++++++++++++++++-------------
 1 file changed, 17 insertions(+), 13 deletions(-)

--- a/drivers/gpu/drm/radeon/evergreen_hdmi.c
+++ b/drivers/gpu/drm/radeon/evergreen_hdmi.c
@@ -222,10 +222,6 @@ void evergreen_set_avi_packet(struct rad
 	WREG32_P(HDMI_INFOFRAME_CONTROL1 + offset,
 		 HDMI_AVI_INFO_LINE(2),	/* anything other than 0 */
 		 ~HDMI_AVI_INFO_LINE_MASK);
-
-	WREG32_OR(HDMI_INFOFRAME_CONTROL0 + offset,
-		  HDMI_AVI_INFO_SEND |	/* enable AVI info frames */
-		  HDMI_AVI_INFO_CONT);	/* required for audio info values to be updated */
 }
 
 void dce4_hdmi_audio_set_dto(struct radeon_device *rdev,
@@ -370,9 +366,13 @@ void dce4_set_audio_packet(struct drm_en
 	WREG32(AFMT_AUDIO_PACKET_CONTROL2 + offset,
 		AFMT_AUDIO_CHANNEL_ENABLE(0xff));
 
+	WREG32(HDMI_AUDIO_PACKET_CONTROL + offset,
+	       HDMI_AUDIO_DELAY_EN(1) | /* set the default audio delay */
+	       HDMI_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */
+
 	/* allow 60958 channel status and send audio packets fields to be updated */
-	WREG32(AFMT_AUDIO_PACKET_CONTROL + offset,
-		AFMT_AUDIO_SAMPLE_SEND | AFMT_RESET_FIFO_WHEN_AUDIO_DIS | AFMT_60958_CS_UPDATE);
+	WREG32_OR(AFMT_AUDIO_PACKET_CONTROL + offset,
+		  AFMT_RESET_FIFO_WHEN_AUDIO_DIS | AFMT_60958_CS_UPDATE);
 }
 
 
@@ -398,17 +398,16 @@ void evergreen_hdmi_enable(struct drm_en
 		return;
 
 	if (enable) {
-		WREG32(HDMI_INFOFRAME_CONTROL1 + dig->afmt->offset,
-		       HDMI_AUDIO_INFO_LINE(2)); /* anything other than 0 */
-
-		WREG32(HDMI_AUDIO_PACKET_CONTROL + dig->afmt->offset,
-		       HDMI_AUDIO_DELAY_EN(1) | /* set the default audio delay */
-		       HDMI_AUDIO_PACKETS_PER_LINE(3)); /* should be suffient for all audio modes and small enough for all hblanks */
-
 		WREG32(HDMI_INFOFRAME_CONTROL0 + dig->afmt->offset,
+		       HDMI_AVI_INFO_SEND | /* enable AVI info frames */
+		       HDMI_AVI_INFO_CONT | /* required for audio info values to be updated */
 		       HDMI_AUDIO_INFO_SEND | /* enable audio info frames (frames won't be set until audio is enabled) */
 		       HDMI_AUDIO_INFO_CONT); /* required for audio info values to be updated */
+		WREG32_OR(AFMT_AUDIO_PACKET_CONTROL + dig->afmt->offset,
+			  AFMT_AUDIO_SAMPLE_SEND);
 	} else {
+		WREG32_AND(AFMT_AUDIO_PACKET_CONTROL + dig->afmt->offset,
+			   ~AFMT_AUDIO_SAMPLE_SEND);
 		WREG32(HDMI_INFOFRAME_CONTROL0 + dig->afmt->offset, 0);
 	}
 
@@ -434,6 +433,9 @@ void evergreen_dp_enable(struct drm_enco
 		struct radeon_connector_atom_dig *dig_connector;
 		uint32_t val;
 
+		WREG32_OR(AFMT_AUDIO_PACKET_CONTROL + dig->afmt->offset,
+			  AFMT_AUDIO_SAMPLE_SEND);
+
 		WREG32(EVERGREEN_DP_SEC_TIMESTAMP + dig->afmt->offset,
 		       EVERGREEN_DP_SEC_TIMESTAMP_MODE(1));
 
@@ -457,6 +459,8 @@ void evergreen_dp_enable(struct drm_enco
 			EVERGREEN_DP_SEC_STREAM_ENABLE);	/* Master enable for secondary stream engine */
 	} else {
 		WREG32(EVERGREEN_DP_SEC_CNTL + dig->afmt->offset, 0);
+		WREG32_AND(AFMT_AUDIO_PACKET_CONTROL + dig->afmt->offset,
+			   ~AFMT_AUDIO_SAMPLE_SEND);
 	}
 
 	dig->afmt->enabled = enable;


Patches currently in stable-queue which might be from alexander.deucher@amd.com are

queue-4.0/drm-radeon-fix-lockup-when-bos-aren-t-part-of-the-vm-on-release.patch
queue-4.0/drm-radeon-reset-bos-address-after-clearing-it.patch
queue-4.0/drm-radeon-adjust-pll-when-audio-is-not-enabled.patch
queue-4.0/drm-radeon-add-si-dpm-quirk-for-sapphire-r9-270-dual-x-2g-gddr5.patch
queue-4.0/drm-radeon-only-enable-audio-streams-if-the-monitor-supports-it.patch
queue-4.0/drm-radeon-only-mark-audio-as-connected-if-the-monitor-supports-it-v3.patch
queue-4.0/drm-radeon-drop-dce6_dp_enable.patch
queue-4.0/drm-radeon-audio-don-t-enable-packets-until-the-end.patch
queue-4.0/drm-radeon-check-new-address-before-removing-old-one.patch
queue-4.0/drm-radeon-fix-ordering-of-avi-packet-setup.patch
queue-4.0/drm-radeon-use-drm_calloc_ab-for-cs-relocs.patch