diff options
Diffstat (limited to 'drivers/gpu/drm/msm/dp/dp_catalog.c')
| -rw-r--r-- | drivers/gpu/drm/msm/dp/dp_catalog.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/drivers/gpu/drm/msm/dp/dp_catalog.c b/drivers/gpu/drm/msm/dp/dp_catalog.c index 5869901d8659..aff1e504f66f 100644 --- a/drivers/gpu/drm/msm/dp/dp_catalog.c +++ b/drivers/gpu/drm/msm/dp/dp_catalog.c @@ -245,6 +245,19 @@ void dp_catalog_aux_update_cfg(struct dp_catalog *dp_catalog) phy_calibrate(phy); } +int dp_catalog_aux_wait_for_hpd_connect_state(struct dp_catalog *dp_catalog) +{ + u32 state; + struct dp_catalog_private *catalog = container_of(dp_catalog, + struct dp_catalog_private, dp_catalog); + + /* poll for hpd connected status every 2ms and timeout after 500ms */ + return readl_poll_timeout(catalog->io->dp_controller.aux.base + + REG_DP_DP_HPD_INT_STATUS, + state, state & DP_DP_HPD_STATE_STATUS_CONNECTED, + 2000, 500000); +} + static void dump_regs(void __iomem *base, int len) { int i; |