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drm/i915/tc: Add separate intel_tc_phy_port_to_tc() for TC DDI/PHY ports

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intel_port_to_tc() returns the PORT_TC1..6 -> TC_PORT_1..6 mapping only
for DDI ports that are connected to a TypeC PHY. In some cases this
mapping is also required for TypeC DDI ports which are not connected to
a TypeC PHY. Such DDI ports are the PORT_TC1..4 ports on RKL/ADLS/BMG.

Add a separate intel_tc_phy_to_tc() helper to return the mapping for
ports connected to a TypeC PHY, and make all the current users - which
expect this semantic - call this helper. A follow-up change will need to
get the same mapping for TypeC DDI ports not connected to a TypeC PHY,
leave intel_port_to_tc() exported for that.

Cc: Suraj Kandpal <suraj.kandpal@intel.com>
Cc: Mika Kahola <mika.kahola@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patch.msgid.link/20251120172358.1282765-2-imre.deak@intel.com
This commit is contained in:
Imre Deak
2025-11-20 19:23:55 +02:00
parent 370f45b1ce
commit 8aa2945f04
3 changed files with 22 additions and 6 deletions
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23
drivers/gpu/drm/i915/display/intel_display.c
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@@ -1859,17 +1859,32 @@ enum phy intel_port_to_phy(struct intel_display *display, enum port port)
}
/* Prefer intel_encoder_to_tc() */
/*
* Return TC_PORT_1..I915_MAX_TC_PORTS for any TypeC DDI port. The function
* can be also called for TypeC DDI ports not connected to a TypeC PHY such as
* the PORT_TC1..4 ports on RKL/ADLS/BMG.
*/
enum tc_port intel_port_to_tc(struct intel_display *display, enum port port)
{
if (!intel_phy_is_tc(display, intel_port_to_phy(display, port)))
return TC_PORT_NONE;
if (DISPLAY_VER(display) >= 12)
return TC_PORT_1 + port - PORT_TC1;
else
return TC_PORT_1 + port - PORT_C;
}
/*
* Return TC_PORT_1..I915_MAX_TC_PORTS for TypeC DDI ports connected to a TypeC PHY.
* Note that on RKL, ADLS, BMG the PORT_TC1..4 ports are connected to a non-TypeC
* PHY, so on those platforms the function returns TC_PORT_NONE.
*/
enum tc_port intel_tc_phy_port_to_tc(struct intel_display *display, enum port port)
{
if (!intel_phy_is_tc(display, intel_port_to_phy(display, port)))
return TC_PORT_NONE;
return intel_port_to_tc(display, port);
}
enum phy intel_encoder_to_phy(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
@@ -1902,7 +1917,7 @@ enum tc_port intel_encoder_to_tc(struct intel_encoder *encoder)
{
struct intel_display *display = to_intel_display(encoder);
return intel_port_to_tc(display, encoder->port);
return intel_tc_phy_port_to_tc(display, encoder->port);
}
enum intel_display_power_domain