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From:   Kuogee Hsieh <khsieh@codeaurora.org>
To:     robdclark@gmail.com, sean@poorly.run, swboyd@chromium.org
Cc:     tanmay@codeaurora.org, abhinavk@codeaurora.org,
        aravindh@codeaurora.org, khsieh@codeaurora.org, airlied@linux.ie,
        daniel@ffwll.ch, linux-arm-msm@vger.kernel.org,
        dri-devel@lists.freedesktop.org, freedreno@lists.freedesktop.org,
        linux-kernel@vger.kernel.org
Subject: [PATCH v2 2/3] drm/msm/dp: initialize audio_comp when audio starts
Date:   Wed, 14 Apr 2021 14:02:50 -0700
Message-Id: <1618434170-28302-1-git-send-email-khsieh@codeaurora.org>
Precedence: bulk

Initialize audio_comp when audio starts and wait for audio_comp at
dp_display_disable(). This will take care of both dongle unplugged
and display off (suspend) cases.

Changes in v2:
-- add dp_display_start_audio()

Signed-off-by: Kuogee Hsieh <khsieh@codeaurora.org>
---
 drivers/gpu/drm/msm/dp/dp_audio.c   |  1 +
 drivers/gpu/drm/msm/dp/dp_display.c | 13 ++++++++-----
 drivers/gpu/drm/msm/dp/dp_display.h |  1 +
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/msm/dp/dp_audio.c b/drivers/gpu/drm/msm/dp/dp_audio.c
index 82a8673..52994f2 100644
--- a/drivers/gpu/drm/msm/dp/dp_audio.c
+++ b/drivers/gpu/drm/msm/dp/dp_audio.c
@@ -527,6 +527,7 @@ int dp_audio_hw_params(struct device *dev,
 	dp_audio_setup_acr(audio);
 	dp_audio_safe_to_exit_level(audio);
 	dp_audio_enable(audio, true);
+	dp_display_start_audio(dp_display);
 	dp_display->audio_enabled = true;
 
 end:
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c
index 0ba71c7..8a69bcd 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.c
+++ b/drivers/gpu/drm/msm/dp/dp_display.c
@@ -177,6 +177,14 @@ static int dp_del_event(struct dp_display_private *dp_priv, u32 event)
 
 	return 0;
 }
+void dp_display_start_audio(struct msm_dp *dp_display)
+{
+	struct dp_display_private *dp;
+
+	dp = container_of(dp_display, struct dp_display_private, dp_display);
+
+	reinit_completion(&dp->audio_comp);
+}
 
 void dp_display_signal_audio_complete(struct msm_dp *dp_display)
 {
@@ -648,10 +656,6 @@ static int dp_hpd_unplug_handle(struct dp_display_private *dp, u32 data)
 	/* start sentinel checking in case of missing uevent */
 	dp_add_event(dp, EV_DISCONNECT_PENDING_TIMEOUT, 0, DP_TIMEOUT_5_SECOND);
 
-	/* signal the disconnect event early to ensure proper teardown */
-	reinit_completion(&dp->audio_comp);
-	dp_display_handle_plugged_change(g_dp_display, false);
-
 	dp_catalog_hpd_config_intr(dp->catalog, DP_DP_HPD_PLUG_INT_MASK |
 					DP_DP_IRQ_HPD_INT_MASK, true);
 
@@ -894,7 +898,6 @@ static int dp_display_disable(struct dp_display_private *dp, u32 data)
 	/* wait only if audio was enabled */
 	if (dp_display->audio_enabled) {
 		/* signal the disconnect event */
-		reinit_completion(&dp->audio_comp);
 		dp_display_handle_plugged_change(dp_display, false);
 		if (!wait_for_completion_timeout(&dp->audio_comp,
 				HZ * 5))
diff --git a/drivers/gpu/drm/msm/dp/dp_display.h b/drivers/gpu/drm/msm/dp/dp_display.h
index 6092ba1..55fe0d4 100644
--- a/drivers/gpu/drm/msm/dp/dp_display.h
+++ b/drivers/gpu/drm/msm/dp/dp_display.h
@@ -34,6 +34,7 @@ int dp_display_get_modes(struct msm_dp *dp_display,
 int dp_display_request_irq(struct msm_dp *dp_display);
 bool dp_display_check_video_test(struct msm_dp *dp_display);
 int dp_display_get_test_bpp(struct msm_dp *dp_display);
+void dp_display_start_audio(struct msm_dp *dp_display);
 void dp_display_signal_audio_complete(struct msm_dp *dp_display);
 
 #endif /* _DP_DISPLAY_H_ */
-- 
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