Re: [PATCH] drm: bridge: dw-hdmi: Avoid resetting force in the detect function

[Sam Ravnborg]

Hi Jonathan
On Sat, Oct 31, 2020 at 07:17:47PM +1100, Jonathan Liu wrote:
> It has been observed that resetting force in the detect function can
> result in the PHY being powered down in response to hot-plug detect
> being asserted, even when the HDMI connector is forced on.
> 
> Enabling debug messages and adding a call to dump_stack() in
> dw_hdmi_phy_power_off() shows the following in dmesg:
> [  160.637413] dwhdmi-rockchip ff940000.hdmi: EVENT=plugin
> [  160.637433] dwhdmi-rockchip ff940000.hdmi: PHY powered down in 0 iterations
> 
> Call trace:
> dw_hdmi_phy_power_off
> dw_hdmi_phy_disable
> dw_hdmi_update_power
> dw_hdmi_detect
> dw_hdmi_connector_detect
> drm_helper_probe_detect_ctx
> drm_helper_hpd_irq_event
> dw_hdmi_irq
> irq_thread_fn
> irq_thread
> kthread
> ret_from_fork
> 
> Fixes: 381f05a7a842 ("drm: bridge/dw_hdmi: add connector mode forcing")
> Signed-off-by: Jonathan Liu <net147@xxxxxxxxx>

Applied to drm-misc-fixes.

	Sam