diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_lspcon.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_lspcon.c | 22 |
1 files changed, 15 insertions, 7 deletions
diff --git a/drivers/gpu/drm/i915/intel_lspcon.c b/drivers/gpu/drm/i915/intel_lspcon.c index beb9baaf2f2e..dcbc786479f9 100644 --- a/drivers/gpu/drm/i915/intel_lspcon.c +++ b/drivers/gpu/drm/i915/intel_lspcon.c @@ -56,7 +56,7 @@ static enum drm_lspcon_mode lspcon_get_current_mode(struct intel_lspcon *lspcon) struct i2c_adapter *adapter = &lspcon_to_intel_dp(lspcon)->aux.ddc; if (drm_lspcon_get_mode(adapter, ¤t_mode)) { - DRM_ERROR("Error reading LSPCON mode\n"); + DRM_DEBUG_KMS("Error reading LSPCON mode\n"); return DRM_LSPCON_MODE_INVALID; } return current_mode; @@ -68,16 +68,15 @@ static enum drm_lspcon_mode lspcon_wait_mode(struct intel_lspcon *lspcon, enum drm_lspcon_mode current_mode; current_mode = lspcon_get_current_mode(lspcon); - if (current_mode == mode || current_mode == DRM_LSPCON_MODE_INVALID) + if (current_mode == mode) goto out; DRM_DEBUG_KMS("Waiting for LSPCON mode %s to settle\n", lspcon_mode_name(mode)); - wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode || - current_mode == DRM_LSPCON_MODE_INVALID, 100); + wait_for((current_mode = lspcon_get_current_mode(lspcon)) == mode, 100); if (current_mode != mode) - DRM_DEBUG_KMS("LSPCON mode hasn't settled\n"); + DRM_ERROR("LSPCON mode hasn't settled\n"); out: DRM_DEBUG_KMS("Current LSPCON mode %s\n", @@ -133,6 +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; @@ -141,10 +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; } |