diff options
Diffstat (limited to '')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lspcon.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c index 768825472754..dcbc786479f9 100644 --- a/drivers/gpu/drm/i915/intel_lspcon.c +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -132,6 +132,7 @@ static bool lspcon_wake_native_aux_ch(struct intel_lspcon *lspcon) static bool lspcon_probe(struct intel_lspcon *lspcon) { + int retry; enum drm_dp_dual_mode_type adaptor_type; struct i2c_adapter *adapter = &lspcon_to_intel_dp(lspcon)->aux.ddc; enum drm_lspcon_mode expected_mode; @@ -140,10 +141,18 @@ static bool lspcon_probe(struct intel_lspcon *lspcon) DRM_LSPCON_MODE_PCON : DRM_LSPCON_MODE_LS; /* Lets probe the adaptor and check its type */ - adaptor_type = drm_dp_dual_mode_detect(adapter); + for (retry = 0; retry < 6; retry++) { + if (retry) + usleep_range(500, 1000); + + adaptor_type = drm_dp_dual_mode_detect(adapter); + if (adaptor_type == DRM_DP_DUAL_MODE_LSPCON) + break; + } + if (adaptor_type != DRM_DP_DUAL_MODE_LSPCON) { DRM_DEBUG_KMS("No LSPCON detected, found %s\n", - drm_dp_get_dual_mode_type_name(adaptor_type)); + drm_dp_get_dual_mode_type_name(adaptor_type)); return false; } |