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drm/i915/dp: Do not switch aux to TBT mode for non-TC ports 

Non-TC ports always have tc_mode == TC_PORT_TBT_ALT so it was
switching aux to TBT mode for all combo-phy ports, happily this did
not caused any issue but is better follow BSpec.
Also this is reserved bit before ICL.

Cc: Imre Deak <imre.deak@intel.com>
Signed-off-by: José Roberto de Souza <jose.souza@intel.com>
Fixes: e9b7e1422d ("drm/i915: Sanitize the terminology used for TypeC port modes")
Reviewed-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20191029011014.286885-1-jose.souza@intel.com
This commit is contained in:
José Roberto de Souza 2019-10-28 18:10:14 -07:00
parent 034982cff1
commit 4974826482
1 changed files with 5 additions and 1 deletions
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6
drivers/gpu/drm/i915/display/intel_dp.c
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@ -1293,6 +1293,9 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
u32 unused)
{
struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
struct drm_i915_private *i915 =
to_i915(intel_dig_port->base.base.dev);
enum phy phy = intel_port_to_phy(i915, intel_dig_port->base.port);
u32 ret;
ret = DP_AUX_CH_CTL_SEND_BUSY |
@ -1305,7 +1308,8 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
if (intel_dig_port->tc_mode == TC_PORT_TBT_ALT)
if (intel_phy_is_tc(i915, phy) &&
intel_dig_port->tc_mode == TC_PORT_TBT_ALT)
ret |= DP_AUX_CH_CTL_TBT_IO;
return ret;