[Bug 105325] [KBL LSPCON] Linux will reboot when installing with connect HDMI monitor (include PS175 LSPCON)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=105325

--- Comment #18 from James <jameshohuang at supermicro.com> ---
Hi Shashank,
PS175 vendor pointed the reset is caused by send DPCD command address: 0x00600
Data: 02

I check the code, and Linux will set D3 power when booting.

#define DP_SET_POWER                        0x600
# define DP_SET_POWER_D0                    0x1
# define DP_SET_POWER_D3                    0x2

void intel_dp_sink_dpms(struct intel_dp *intel_dp, int mode)
{
        int ret, i;

        /* Should have a valid DPCD by this point */
        if (intel_dp->dpcd[DP_DPCD_REV] < 0x11)
                return;

        if (mode != DRM_MODE_DPMS_ON) {
                if (downstream_hpd_needs_d0(intel_dp))
                        return;

                ret = drm_dp_dpcd_writeb(&intel_dp->aux, DP_SET_POWER,
                                         DP_SET_POWER_D3);
        } else {

Is there any boot option we can skip DP set power d3?

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