On HP 800 G4 DM, if HDMI cable isn't plugged before boot, the HDMI port becomes useless and never responds to cable hotplugging: [ 3.031904] [drm:lspcon_init [i915]] *ERROR* Failed to probe lspcon [ 3.031945] [drm:intel_ddi_init [i915]] *ERROR* LSPCON init failed on port D Seems like the lspcon chip on the system in question only gets powered after the cable is plugged. So let's call lspcon_init() dynamically to properly initialize the lspcon chip and make HDMI port work. Closes: https://gitlab.freedesktop.org/drm/intel/issues/203 Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx> --- drivers/gpu/drm/i915/display/intel_hotplug.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_hotplug.c b/drivers/gpu/drm/i915/display/intel_hotplug.c index fc29046d48ea..e2862e36d0bf 100644 --- a/drivers/gpu/drm/i915/display/intel_hotplug.c +++ b/drivers/gpu/drm/i915/display/intel_hotplug.c @@ -28,6 +28,7 @@ #include "i915_drv.h" #include "intel_display_types.h" #include "intel_hotplug.h" +#include "intel_lspcon.h" /** * DOC: Hotplug @@ -336,6 +337,8 @@ static void i915_digport_work_func(struct work_struct *work) continue; dig_port = enc_to_dig_port(&encoder->base); + if (HAS_LSPCON(dev_priv) && !dig_port->lspcon.active) + lspcon_init(dig_port); ret = dig_port->hpd_pulse(dig_port, long_hpd); if (ret == IRQ_NONE) { -- 2.17.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/intel-gfx
