From: Archit Taneja architt@codeaurora.org
On some adv7511 implementations, we can get some spurious disconnect signals which can cause monitor probing to fail.
This patch enables HPD (hot plug detect) interrupt support which allows the monitor to be properly re-initialized when the spurious disconnect signal goes away.
This also enables proper hotplug support.
Cc: David Airlie airlied@linux.ie Cc: Archit Taneja architt@codeaurora.org Cc: Wolfram Sang wsa+renesas@sang-engineering.com Cc: Lars-Peter Clausen lars@metafoo.de Cc: Laurent Pinchart laurent.pinchart@ideasonboard.com Cc: dri-devel@lists.freedesktop.org Acked-by: Laurent Pinchart laurent.pinchart@ideasonboard.com Originally-by: Archit Taneja architt@codeaurora.org [jstultz: Added proper commit message] Signed-off-by: John Stultz john.stultz@linaro.org --- drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 2caca0c..9f8dffd 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -338,7 +338,7 @@ static void adv7511_power_on(struct adv7511 *adv7511) * Still, let's be safe and stick to the documentation. */ regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0), - ADV7511_INT0_EDID_READY); + ADV7511_INT0_EDID_READY | ADV7511_INT0_HPD); regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1), ADV7511_INT1_DDC_ERROR); } @@ -833,6 +833,10 @@ static int adv7511_bridge_attach(struct drm_bridge *bridge) if (adv->type == ADV7533) ret = adv7533_attach_dsi(adv);
+ if (adv->i2c_main->irq) + regmap_write(adv->regmap, ADV7511_REG_INT_ENABLE(0), + ADV7511_INT0_HPD); + return ret; }