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drm/bridge: it6505: Check power state with it6505->powered in IRQ handler

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On system resume, the driver might call it6505_poweron directly if the
runtime PM hasn't been enabled. In such case, pm_runtime_get_if_in_use
will always return 0 because dev->power.runtime_status stays at
RPM_SUSPENDED, and the IRQ will never be handled.

Use it6505->powered from the driver struct fixes this because it always
gets updated when it6505_poweron is called.

Fixes: 5eb9a43140 ("drm/bridge: it6505: Guard bridge power in IRQ handler")
Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org>
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230727100131.2338127-1-treapking@chromium.org
This commit is contained in:
Pin-yen Lin 2023-07-27 18:01:10 +08:00 committed by Neil Armstrong
parent c71b7aa861
commit e9d699af3f
1 changed files with 3 additions and 1 deletions
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4
drivers/gpu/drm/bridge/ite-it6505.c
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@ -2517,9 +2517,11 @@ static irqreturn_t it6505_int_threaded_handler(int unused, void *data)
};
int int_status[3], i;
if (it6505->enable_drv_hold || pm_runtime_get_if_in_use(dev) <= 0)
if (it6505->enable_drv_hold || !it6505->powered)
return IRQ_HANDLED;
pm_runtime_get_sync(dev);
int_status[0] = it6505_read(it6505, INT_STATUS_01);
int_status[1] = it6505_read(it6505, INT_STATUS_02);
int_status[2] = it6505_read(it6505, INT_STATUS_03);