Question: Re: [PATCH] drm/bridge: analogix: protect power when get_modes or detect

On 2016年10月12日 22:51, Sean Paul wrote: > On Wed, Oct 12, 2016 at 6:22 AM, Mark yao wrote: >> I'm not familiar with the analogix driver, maybe use a power reference count >> would better then direct power on/off analogix_dp. >> >> Does anyone has the idea to protect detect and get_modes conte

Question: Re: [PATCH] drm/bridge: analogix: protect power when get_modes or detect

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[PATCH] drm/bridge: analogix: protect power when get_modes or detect

The drm callback ->detect and ->get_modes seems is not power safe, they may be called when device is power off, do register access on detect or get_modes will cause system die. Here is the path call ->detect before analogix_dp power on [] analogix_dp_detect+0x44/0xdc [] drm_helper_probe_single_co

Question: Re: [PATCH] drm/bridge: analogix: protect power when get_modes or detect

On Wed, Oct 12, 2016 at 6:22 AM, Mark yao wrote: > > I'm not familiar with the analogix driver, maybe use a power reference count > would better then direct power on/off analogix_dp. > > Does anyone has the idea to protect detect and get_modes context? > I'm not sure a reference count is going to