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disp: msm: dp: check panel state before accessing dp audio registers

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During DP disable, it is possible for audio and display to race
causing the audio to send teardown notification after display driver
has disabled all the clocks. This change adds a check for panel state to
avoid accessing registers during this callback.

Change-Id: I6322726a04745bc6c73338cd33f65cfdbfe42ec7
Signed-off-by: Nisarg Bhavsar <quic_bhavsar@quicinc.com>
This commit is contained in:
Nisarg Bhavsar
2023-03-07 09:18:13 -08:00
parent c3622fa326
commit 65925ebbf0
3 changed files with 15 additions and 2 deletions
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4
msm/dp/dp_audio.c
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@@ -1,6 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2022, Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2022-2023, Qualcomm Innovation Center, Inc. All rights reserved.
* Copyright (c) 2016-2021, The Linux Foundation. All rights reserved.
*/
@@ -362,6 +362,8 @@ static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
return;
}
catalog->data = enable;
if (audio->panel->get_panel_on(audio->panel))
catalog->enable(catalog);
}

10
msm/dp/dp_panel.c
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@@ -3126,6 +3126,15 @@ int dp_panel_sink_crc_enable(struct dp_panel *dp_panel, bool enable)
return rc;
}
bool dp_panel_get_panel_on(struct dp_panel *dp_panel)
{
struct dp_panel_private *panel;
panel = container_of(dp_panel, struct dp_panel_private, dp_panel);
return panel->panel_on;
}
struct dp_panel *dp_panel_get(struct dp_panel_in *in)
{
int rc = 0;
@@ -3204,6 +3213,7 @@ struct dp_panel *dp_panel_get(struct dp_panel_in *in)
dp_panel->get_src_crc = dp_panel_get_src_crc;
dp_panel->get_sink_crc = dp_panel_get_sink_crc;
dp_panel->sink_crc_enable = dp_panel_sink_crc_enable;
dp_panel->get_panel_on = dp_panel_get_panel_on;
sde_conn = to_sde_connector(dp_panel->connector);
sde_conn->drv_panel = dp_panel;

1
msm/dp/dp_panel.h
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@@ -198,6 +198,7 @@ struct dp_panel {
int (*sink_crc_enable)(struct dp_panel *dp_panel, bool enable);
int (*get_src_crc)(struct dp_panel *dp_panel, u16 *crc);
int (*get_sink_crc)(struct dp_panel *dp_panel, u16 *crc);
bool (*get_panel_on)(struct dp_panel *dp_panel);
};
struct dp_tu_calc_input {