From: Archit Taneja Date: Tue, 17 Jan 2017 00:52:49 +0000 (-0800) Subject: drm/bridge: adv7511: Enable HPD interrupts to support hotplug and improve monitor... X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=40d86d2d22b04c2b2e48e2fe7054b85cf5021f25;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git drm/bridge: adv7511: Enable HPD interrupts to support hotplug and improve monitor detection 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 Cc: Archit Taneja Cc: Wolfram Sang Cc: Lars-Peter Clausen Cc: Laurent Pinchart Cc: dri-devel@lists.freedesktop.org Acked-by: Laurent Pinchart Tested-by: Laurent Pinchart Originally-by: Archit Taneja [jstultz: Added proper commit message] Signed-off-by: John Stultz Signed-off-by: Archit Taneja Link: http://patchwork.freedesktop.org/patch/msgid/1484614372-15342-4-git-send-email-john.stultz@linaro.org --- diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 60773387fcdf..72939d429da6 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); } @@ -846,6 +846,10 @@ 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; }