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UPSTREAM: drm: bridge: dw-hdmi: Don't forward HPD events to DRM core before attach

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Hotplug events should only be forwarded to the DRM core by the interrupt
handler when the bridge has been attached, otherwise the DRM device
pointer will be NULL, resulting in a crash.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Jose Abreu <joabreu@synopsys.com>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/20170117082910.27023-7-laurent.pinchart+renesas@ideasonboard.com

Change-Id: Ic1387b5253d4586774cdb82e089effdd4104e380
Signed-off-by: Zheng Yang <zhengyang@rock-chips.com>
(cherry pick from ba5d7e6160)
This commit is contained in:
Laurent Pinchart
2017-01-17 10:28:56 +02:00
committed by Zheng Yang
parent 6c0f053621
commit f3bb4cdf7b
1 changed files with 2 additions and 1 deletions
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3
drivers/gpu/drm/bridge/dw-hdmi.c
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@@ -291,7 +291,8 @@ static void repo_hpd_event(struct work_struct *p_work)
{
struct dw_hdmi *hdmi = container_of(p_work, struct dw_hdmi, work.work);
drm_helper_hpd_irq_event(hdmi->bridge.dev);
if (hdmi->bridge.dev)
drm_helper_hpd_irq_event(hdmi->bridge.dev);
#ifdef CONFIG_SWITCH
if (hdmi->hpd_state)
switch_set_state(&hdmi->switchdev, 1);