Some dongles, such as Apple, required link training done at irq_hpd request instead of plugin request. This patch promote irq_hpd hanlder to handle link training and setup hpd_state correctly.
Signed-off-by: Kuogee Hsieh khsieh@codeaurora.org --- drivers/gpu/drm/msm/dp/dp_display.c | 20 ++++++++++++++++++-- 1 file changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/msm/dp/dp_display.c b/drivers/gpu/drm/msm/dp/dp_display.c index 13b66266cd69..55627530957c 100644 --- a/drivers/gpu/drm/msm/dp/dp_display.c +++ b/drivers/gpu/drm/msm/dp/dp_display.c @@ -469,7 +469,9 @@ static int dp_display_handle_irq_hpd(struct dp_display_private *dp) static int dp_display_usbpd_attention_cb(struct device *dev) { int rc = 0; + u32 sink_request; struct dp_display_private *dp; + struct dp_usbpd *hpd;
if (!dev) { DRM_ERROR("invalid dev\n"); @@ -483,10 +485,24 @@ static int dp_display_usbpd_attention_cb(struct device *dev) return -ENODEV; }
+ hpd = dp->usbpd; + /* check for any test request issued by sink */ rc = dp_link_process_request(dp->link); - if (!rc) - dp_display_handle_irq_hpd(dp); + if (!rc) { + sink_request = dp->link->sink_request; + if (sink_request & DS_PORT_STATUS_CHANGED) { + dp->hpd_state = ST_CONNECT_PENDING; + hpd->hpd_high = 1; + } + + rc = dp_display_handle_irq_hpd(dp); + + if (rc && sink_request & DS_PORT_STATUS_CHANGED) { + hpd->hpd_high = 0; + dp->hpd_state = ST_DISCONNECTED; + } + }
return rc; }
base-commit: 0e162b10644605428cd2596c12f8ed410cf9d2d9