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drm/bridge: it6505: Disable IRQ when powered off

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When the bridge is powered off, disable the IRQ until the next power on
to workaround an interrupt storm on some badly-designed hardware.

Signed-off-by: Pin-yen Lin <treapking@chromium.org>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240719110623.1850021-1-treapking@chromium.org
This commit is contained in:
Pin-yen Lin 2024-07-19 19:05:36 +08:00 committed by Robert Foss
parent 7214da0ed2
commit 10ba375366
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GPG Key ID: 3EFD900F76D1D784
1 changed files with 12 additions and 5 deletions
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17
drivers/gpu/drm/bridge/ite-it6505.c
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@ -460,6 +460,8 @@ struct it6505 {
bool enable_drv_hold;
const struct drm_edid *cached_edid;
int irq;
};
struct it6505_step_train_para {
@ -2624,6 +2626,8 @@ static int it6505_poweron(struct it6505 *it6505)
it6505_init(it6505);
it6505_lane_off(it6505);
enable_irq(it6505->irq);
return 0;
}
@ -2640,6 +2644,8 @@ static int it6505_poweroff(struct it6505 *it6505)
return 0;
}
disable_irq_nosync(it6505->irq);
if (pdata->gpiod_reset)
gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
@ -3389,7 +3395,7 @@ static int it6505_i2c_probe(struct i2c_client *client)
struct it6505 *it6505;
struct device *dev = &client->dev;
struct extcon_dev *extcon;
int err, intp_irq;
int err;
it6505 = devm_kzalloc(&client->dev, sizeof(*it6505), GFP_KERNEL);
if (!it6505)
@ -3430,17 +3436,18 @@ static int it6505_i2c_probe(struct i2c_client *client)
it6505_parse_dt(it6505);
intp_irq = client->irq;
it6505->irq = client->irq;
if (!intp_irq) {
if (!it6505->irq) {
dev_err(dev, "Failed to get INTP IRQ");
err = -ENODEV;
return err;
}
err = devm_request_threaded_irq(&client->dev, intp_irq, NULL,
err = devm_request_threaded_irq(&client->dev, it6505->irq, NULL,
it6505_int_threaded_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT,
IRQF_TRIGGER_LOW | IRQF_ONESHOT |
IRQF_NO_AUTOEN,
"it6505-intp", it6505);
if (err) {
dev_err(dev, "Failed to request INTP threaded IRQ: %d", err);