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drm/bridge: tpd12s015: Fix irq registering in tpd12s015_probe

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[ Upstream commit c2530cc961 ]

gpiod_to_irq() return negative value in case of error,
the existing code doesn't handle negative error codes.
If the HPD gpio supports IRQs (gpiod_to_irq returns a
valid number), we use the IRQ. If it doesn't (gpiod_to_irq
returns an error), it gets polled via detect().

Fixes: cff5e6f7e8 ("drm/bridge: Add driver for the TI TPD12S015 HDMI level shifter")
Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201102143024.26216-1-yuehaibing@huawei.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
YueHaibing
2020-11-02 22:30:24 +08:00
committed by Greg Kroah-Hartman
parent 332a2c3b6f
commit 6ed6e024e3
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/bridge/ti-tpd12s015.c
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@@ -160,7 +160,7 @@ static int tpd12s015_probe(struct platform_device *pdev)
/* Register the IRQ if the HPD GPIO is IRQ-capable. */
tpd->hpd_irq = gpiod_to_irq(tpd->hpd_gpio);
if (tpd->hpd_irq) {
if (tpd->hpd_irq >= 0) {
ret = devm_request_threaded_irq(&pdev->dev, tpd->hpd_irq, NULL,
tpd12s015_hpd_isr,
IRQF_TRIGGER_RISING |