[PATCH v2 05/23] drm/i915: Don't enable the DDI-IO power in the TypeC TBT-alt mode

Imre Deak
2019-06-20T14:06:13Z

According to the spec we should not enable the DDI-IO power domain if
the TypeC port is in the TBT-alt mode, so do that only in the other
TypeC modes or for non-TypeC ports. See the internal BSpec Index/22243.

v2:
- Add the internal BSpec reference to the log message. (José)

Cc: Manasi Navare <manasi.d.navare@intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa@intel.com>
Cc: José Roberto de Souza <jose.souza@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: José Roberto de Souza <jose.souza@intel.com>
---
drivers/gpu/drm/i915/display/intel_ddi.c | 11 ++++++++---
1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 442cd3997109..c16fa789a931 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3124,7 +3124,10 @@ static void intel_ddi_pre_enable_dp(struct intel_encoder *encoder,

intel_ddi_clk_select(encoder, crtc_state);

- intel_display_power_get(dev_priv, dig_port->ddi_io_power_domain);
+ if (!intel_port_is_tc(dev_priv, port) ||
+ dig_port->tc_mode != TC_PORT_TBT_ALT)
+ intel_display_power_get(dev_priv,
+ dig_port->ddi_io_power_domain);

icl_program_mg_dp_mode(dig_port);
icl_disable_phy_clock_gating(dig_port);
@@ -3306,8 +3309,10 @@ static void intel_ddi_post_disable_dp(struct intel_encoder *encoder,
intel_edp_panel_vdd_on(intel_dp);
intel_edp_panel_off(intel_dp);

- intel_display_power_put_unchecked(dev_priv,
- dig_port->ddi_io_power_domain);
+ if (!intel_port_is_tc(dev_priv, encoder->port) ||
+ dig_port->tc_mode != TC_PORT_TBT_ALT)
+ intel_display_power_put_unchecked(dev_priv,
+ dig_port->ddi_io_power_domain);

intel_ddi_clk_disable(encoder);
}