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drm: adv7511: Fix crash in IRQ handler when no encoder is associated
The ADV7511 is probed before its slave encoder init function associates it with an encoder. This creates a time window during which hot plug detection interrupts can occur with an encoder, resulting in a crash in the IRQ handler. Fix this by ignoring hot plug detection IRQs when no encoder is associated yet. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Acked-by: Lars-Peter Clausen <lars@metafoo.de>
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@ -438,7 +438,7 @@ static int adv7511_irq_process(struct adv7511 *adv7511)
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regmap_write(adv7511->regmap, ADV7511_REG_INT(0), irq0);
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regmap_write(adv7511->regmap, ADV7511_REG_INT(1), irq1);
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if (irq0 & ADV7511_INT0_HDP)
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if (irq0 & ADV7511_INT0_HDP && adv7511->encoder)
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drm_helper_hpd_irq_event(adv7511->encoder->dev);
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if (irq0 & ADV7511_INT0_EDID_READY || irq1 & ADV7511_INT1_DDC_ERROR) {
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