| From 90d20bb5e94027fe643733b1ca8a97fd87cdf41e Mon Sep 17 00:00:00 2001 |
| From: Archit Taneja <architt@codeaurora.org> |
| Date: Mon, 16 Jan 2017 16:52:49 -0800 |
| Subject: [PATCH 004/255] 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 <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> |
| Tested-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> |
| Signed-off-by: Archit Taneja <architt@codeaurora.org> |
| Link: http://patchwork.freedesktop.org/patch/msgid/1484614372-15342-4-git-send-email-john.stultz@linaro.org |
| |
| (cherry picked from commit 40d86d2d22b04c2b2e48e2fe7054b85cf5021f25) |
| Signed-off-by: Simon Horman <horms+renesas@verge.net.au> |
| --- |
| drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 +++++- |
| 1 file changed, 5 insertions(+), 1 deletion(-) |
| |
| --- 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 adv7 |
| * 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 |
| 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; |
| } |
| |
