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display: trigger dptx hpd before waiting for iboot hpd

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This is not enough to make the display work but at least triggers
dptx-phy link config (lane count/link rate).
This commit is contained in:
Janne Grunau 2023-02-01 14:22:25 +01:00
parent 26ceac4a3a
commit d4b3e758da
1 changed files with 7 additions and 0 deletions
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7
src/display.c
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@ -331,6 +331,13 @@ int display_configure(const char *config)
int timing_cnt, color_cnt;
int hpd = 0, retries = 0;
/* trigger HPD on dptx endpoint, triggers a request from dcp to configure
* the dptx-phy config (lane count/link rate) but according to dcp's
* syslog the AP is not ready for hotplug event and dcp_ib_get_hpd() will
* timeout.
*/
dcp_dptx_hpd(dptx, 0, true);
/* After boot DCP does not immediately report a connected display. Retry getting display
* information for 2 seconds.
*/