diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_aux.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_dp_aux.c | 45 |
1 files changed, 27 insertions, 18 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_dp_aux.c b/drivers/gpu/drm/i915/display/intel_dp_aux.c index 705915d50565..0c27db8ae4f1 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_aux.c +++ b/drivers/gpu/drm/i915/display/intel_dp_aux.c @@ -161,14 +161,14 @@ static u32 g4x_get_aux_send_ctl(struct intel_dp *intel_dp, timeout = DP_AUX_CH_CTL_TIME_OUT_400us; return DP_AUX_CH_CTL_SEND_BUSY | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_INTERRUPT | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - timeout | - DP_AUX_CH_CTL_RECEIVE_ERROR | - (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - (g4x_dp_aux_precharge_len() << DP_AUX_CH_CTL_PRECHARGE_2US_SHIFT) | - (aux_clock_divider << DP_AUX_CH_CTL_BIT_CLOCK_2X_SHIFT); + DP_AUX_CH_CTL_DONE | + DP_AUX_CH_CTL_INTERRUPT | + DP_AUX_CH_CTL_TIME_OUT_ERROR | + timeout | + DP_AUX_CH_CTL_RECEIVE_ERROR | + DP_AUX_CH_CTL_MESSAGE_SIZE(send_bytes) | + DP_AUX_CH_CTL_PRECHARGE_2US(g4x_dp_aux_precharge_len()) | + DP_AUX_CH_CTL_BIT_CLOCK_2X(aux_clock_divider); } static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp, @@ -185,14 +185,14 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp, * ICL+: 4ms */ ret = DP_AUX_CH_CTL_SEND_BUSY | - DP_AUX_CH_CTL_DONE | - DP_AUX_CH_CTL_INTERRUPT | - DP_AUX_CH_CTL_TIME_OUT_ERROR | - DP_AUX_CH_CTL_TIME_OUT_MAX | - DP_AUX_CH_CTL_RECEIVE_ERROR | - (send_bytes << DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT) | - DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(intel_dp_aux_fw_sync_len()) | - DP_AUX_CH_CTL_SYNC_PULSE_SKL(intel_dp_aux_sync_len()); + DP_AUX_CH_CTL_DONE | + DP_AUX_CH_CTL_INTERRUPT | + DP_AUX_CH_CTL_TIME_OUT_ERROR | + DP_AUX_CH_CTL_TIME_OUT_MAX | + DP_AUX_CH_CTL_RECEIVE_ERROR | + DP_AUX_CH_CTL_MESSAGE_SIZE(send_bytes) | + DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(intel_dp_aux_fw_sync_len()) | + DP_AUX_CH_CTL_SYNC_PULSE_SKL(intel_dp_aux_sync_len()); if (intel_tc_port_in_tbt_alt_mode(dig_port)) ret |= DP_AUX_CH_CTL_TBT_IO; @@ -268,6 +268,11 @@ intel_dp_aux_xfer(struct intel_dp *intel_dp, intel_pps_check_power_unlocked(intel_dp); + /* + * FIXME PSR should be disabled here to prevent + * it using the same AUX CH simultaneously + */ + /* Try to wait for any previous AUX channel activity */ for (try = 0; try < 3; try++) { status = intel_de_read_notrace(i915, ch_ctl); @@ -373,8 +378,7 @@ done: } /* Unload any bytes sent back from the other side */ - recv_bytes = ((status & DP_AUX_CH_CTL_MESSAGE_SIZE_MASK) >> - DP_AUX_CH_CTL_MESSAGE_SIZE_SHIFT); + recv_bytes = REG_FIELD_GET(DP_AUX_CH_CTL_MESSAGE_SIZE_MASK, status); /* * By BSpec: "Message sizes of 0 or >20 are not allowed." @@ -810,3 +814,8 @@ enum aux_ch intel_dp_aux_ch(struct intel_encoder *encoder) return aux_ch; } + +void intel_dp_aux_irq_handler(struct drm_i915_private *i915) +{ + wake_up_all(&i915->display.gmbus.wait_queue); +} |