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disp: msm: dp: update hpd handling for mst

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On hpd low signaling, if MST is enabled, then the dp driver should
send the uevent to usermode and wait for the displays to be turned
off before destroying the connectors. In the current mst driver,
hpd low handling is a monolithic step. This change breaks this
into two separate callbacks into the mst driver so the display
driver can wait for usermode completion between these two steps.

When processing hpd low in sim mode, the mst driver uses the drm
framework's the port detection function. When hpd unplug is signaled
to the usermode, it checks the port status before disabling it. But
since the port hasn't been destroyed yet, the framework reports that
the port as still connected. This causes the driver to timeout while
waiting for the the displays to be disabled. This change adds a
wrapper which will report the port status as disconnected when hpd
low is signaled.

Change-Id: I1c59a4878018a300f258bd67c36d1cf4eaf5f67b
Signed-off-by: Rajkumar Subbiah <rsubbia@codeaurora.org>
This commit is contained in:
Rajkumar Subbiah
2020-07-23 12:29:19 -04:00
committed by Gerrit - the friendly Code Review server
parent 32e305e278
commit 65534be8da
3 changed files with 94 additions and 37 deletions
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5
msm/dp/dp_display.h
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@@ -30,11 +30,12 @@ struct dp_mst_hpd_info {
};
struct dp_mst_drm_cbs {
void (*hpd)(void *display, bool hpd_status,
struct dp_mst_hpd_info *info);
void (*hpd)(void *display, bool hpd_status);
void (*hpd_irq)(void *display, struct dp_mst_hpd_info *info);
void (*set_drv_state)(void *dp_display,
enum dp_drv_state mst_state);
int (*set_mgr_state)(void *dp_display, bool state,
struct dp_mst_hpd_info *info);
};
struct dp_mst_drm_install_info {