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display: trigger dptx hpd before waiting for iboot hpd
This is not enough to make the display work but at least triggers dptx-phy link config (lane count/link rate).
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1 changed files with 7 additions and 0 deletions
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@ -331,6 +331,13 @@ int display_configure(const char *config)
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int timing_cnt, color_cnt;
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int hpd = 0, retries = 0;
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/* trigger HPD on dptx endpoint, triggers a request from dcp to configure
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* the dptx-phy config (lane count/link rate) but according to dcp's
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* syslog the AP is not ready for hotplug event and dcp_ib_get_hpd() will
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* timeout.
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*/
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dcp_dptx_hpd(dptx, 0, true);
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/* After boot DCP does not immediately report a connected display. Retry getting display
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* information for 2 seconds.
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*/
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