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disp: msm: add display frequency change notification

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Added notifier to inform registered consumers about display changing
frequency.

Change-Id: Ibc2de44c680e5499282c9b0c96d3a03e4f019f8a
Signed-off-by: Konstantin Makariev <hcv867@motorola.com>
Reviewed-on: https://gerrit.mot.com/1697620
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Guobin Zhang <zhanggb@motorola.com>
Submit-Approved: Jira Key
This commit is contained in:
Konstantin Makariev 2019-11-25 13:33:46 -06:00 • committed by tongkun1
commit 1d87f2a40c
1 changed files with 7 additions and 0 deletions
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7
msm/dsi/dsi_panel.c
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@ -20,6 +20,9 @@
#include "sde_vdc_helper.h"
#include "dsi_display.h"
static struct blocking_notifier_head dsi_freq_head =
BLOCKING_NOTIFIER_INIT(dsi_freq_head);
EXPORT_SYMBOL_GPL(dsi_freq_head);
/**
* topology is currently defined by a set of following 3 values:
@ -5251,6 +5254,10 @@ int dsi_panel_switch(struct dsi_panel *panel)
panel->name, rc);
mutex_unlock(&panel->panel_lock);
/* notify consumers only if refresh rate has been updated */
if (!rc)
blocking_notifier_call_chain(&dsi_freq_head,
(unsigned long)panel->cur_mode->timing.refresh_rate, NULL);
return rc;
}