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| From | John Stultz <john.stultz@linaro.org> |
| Newsgroups | linux.kernel |
| Subject | [RFC][PATCH 3/5 v3] drm/bridge: adv7511: Enable HPD interrupts to support hotplug and improve monitor detection |
| Date | Mon, 12 Dec 2016 22:10:01 +0100 |
| Message-ID | <sNG1b-R8-3@gated-at.bofh.it> (permalink) |
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| X-Original-Cc | Archit Taneja <architt@codeaurora.org>, David Airlie <airlied@linux.ie>, Wolfram Sang <wsa+renesas@sang-engineering.com>, Lars-Peter Clausen <lars@metafoo.de>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, dri-devel@lists.freedesktop.org, John Stultz <john.stultz@linaro.org> |
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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 d93d66f..4b90975 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; } -- 2.7.4
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[RFC][PATCH 3/5 v3] drm/bridge: adv7511: Enable HPD interrupts to support hotplug and improve monitor detection John Stultz <john.stultz@linaro.org> - 2016-12-12 22:10 +0100
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