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drm/sunxi-hdmi: keep forced connector connected

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This commit is contained in:
Qubot 2026-06-05 21:14:10 +08:00
parent 3958ba5d6b
commit a2acb6fcd7
1 changed files with 26 additions and 4 deletions
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30
bsp/drivers/drm/sunxi_drm_hdmi.c
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@ -1479,6 +1479,21 @@ static int _sunxi_drv_hdmi_thread(void *parg)
} else if (ret == 0x2)
goto next_loop;
/*
* The kernel command line may force the connector on
* (video=HDMI-A-1:e). In that mode a transient HPD low after a
* modeset/DPMS transition must not be treated as a real unplug,
* otherwise the driver tears down HDMI and immediately modesets it
* again, which shows up as a periodic HDMI "jump" on screen.
*/
if (hdmi->hdmi_ctrl.drm_hpd_force == DRM_FORCE_ON) {
if (!_sunxi_drv_hdmi_hpd_get(hdmi)) {
temp_hpd = 1;
goto handle_change;
}
goto next_loop;
}
/* check physical hpd state */
temp_hpd = sunxi_hdmi_get_hpd();
if (temp_hpd == _sunxi_drv_hdmi_hpd_get(hdmi))
@ -2664,7 +2679,8 @@ static int _sunxi_drm_hdmi_get_modes(struct drm_connector *connector)
return -1;
}
if (!_sunxi_drv_hdmi_hpd_get(hdmi))
if (!_sunxi_drv_hdmi_hpd_get(hdmi) &&
hdmi->hdmi_ctrl.drm_hpd_force != DRM_FORCE_ON)
return -1;
ret = _sunxi_drv_hdmi_read_edid(hdmi);
@ -2772,7 +2788,10 @@ _sunxi_drm_hdmi_detect(struct drm_connector *connector, bool force)
return ret;
}
ret = _sunxi_drv_hdmi_hpd_get(hdmi);
if (hdmi->hdmi_ctrl.drm_hpd_force == DRM_FORCE_ON)
ret = 1;
else
ret = _sunxi_drv_hdmi_hpd_get(hdmi);
hdmi_inf("drm hdmi detect: %s\n", ret ? "connect" : "disconnect");
return ret == 1 ? connector_status_connected : connector_status_disconnected;
}
@ -2789,10 +2808,13 @@ static void _sunxi_drm_hdmi_force(struct drm_connector *connector)
hdmi->hdmi_ctrl.drm_hpd_force = (int)connector->force;
if (connector->force == DRM_FORCE_ON)
if (connector->force == DRM_FORCE_ON) {
_sunxi_drv_hdmi_hpd_plugin(hdmi);
else if (connector->force == DRM_FORCE_OFF)
_sunxi_drv_hdmi_hpd_set(hdmi, 0x1);
} else if (connector->force == DRM_FORCE_OFF) {
_sunxi_drv_hdmi_hpd_plugout(hdmi);
_sunxi_drv_hdmi_hpd_set(hdmi, 0x0);
}
hdmi_inf("drm hdmi set force hpd: %s\n", force_string[connector->force]);
}