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disp: msm: dp: add session check for audio register programming

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Add a check to ensure that audio registers are programmed only
when the DP timing engine (audio session) is enabled. This will
reduce the likelihood of un-clocked register access for audio
related operations.

Change-Id: I6fe59cf53dc721b5470ad4cf7d84e8606800a246
CRs-Fixed: 2465406
Signed-off-by: Tatenda Chipeperekwa <tatendac@codeaurora.org>
This commit is contained in:
Tatenda Chipeperekwa 2019-06-17 16:59:37 -07:00
parent b69f691680
commit 68f8b1a047
1 changed files with 19 additions and 5 deletions
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24
msm/dp/dp_audio.c
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@ -22,7 +22,7 @@ struct dp_audio_private {
struct dp_panel *panel;
bool ack_enabled;
bool session_on;
atomic_t session_on;
bool engine_on;
u32 channels;
@ -293,6 +293,11 @@ static void dp_audio_isrc_sdp(struct dp_audio_private *audio)
static void dp_audio_setup_sdp(struct dp_audio_private *audio)
{
if (!atomic_read(&audio->session_on)) {
pr_warn("session inactive\n");
return;
}
/* always program stream 0 first before actual stream cfg */
audio->catalog->stream_id = DP_STREAM_0;
audio->catalog->config_sdp(audio->catalog);
@ -314,6 +319,11 @@ static void dp_audio_setup_acr(struct dp_audio_private *audio)
u32 select = 0;
struct dp_catalog_audio *catalog = audio->catalog;
if (!atomic_read(&audio->session_on)) {
pr_warn("session inactive\n");
return;
}
switch (audio->dp_audio.bw_code) {
case DP_LINK_BW_1_62:
select = 0;
@ -341,10 +351,14 @@ static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
{
struct dp_catalog_audio *catalog = audio->catalog;
audio->engine_on = enable;
if (!atomic_read(&audio->session_on)) {
pr_warn("session inactive. enable=%d\n", enable);
return;
}
catalog->data = enable;
catalog->enable(catalog);
audio->engine_on = enable;
}
static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
@ -444,7 +458,7 @@ static int dp_audio_get_cable_status(struct platform_device *pdev, u32 vote)
goto end;
}
return audio->session_on;
return atomic_read(&audio->session_on);
end:
return rc;
}
@ -709,7 +723,7 @@ static int dp_audio_on(struct dp_audio *dp_audio)
ext = &audio->ext_audio_data;
audio->session_on = true;
atomic_set(&audio->session_on, 1);
rc = dp_audio_config(audio, EXT_DISPLAY_CABLE_CONNECT);
if (rc)
@ -751,7 +765,7 @@ static int dp_audio_off(struct dp_audio *dp_audio)
end:
dp_audio_config(audio, EXT_DISPLAY_CABLE_DISCONNECT);
audio->session_on = false;
atomic_set(&audio->session_on, 0);
audio->engine_on = false;
dp_audio_deregister_ext_disp(audio);