On Thu, Apr 20, 2023 at 03:40:49PM +0300, Mika Kahola wrote:
> From: Anusha Srivatsa <[email protected]>
>
> Unlike previous platforms that used PORT_TX_DFLEXDPSP
> for max_lane calculation, MTL uses only PORT_TX_DFLEXPA1
> from which the max_lanes has to be calculated.
>
> Bspec: 50235, 65380
>
Reviewed-by: Matt Atwood <[email protected]>
> Signed-off-by: Anusha Srivatsa <[email protected]>
> Signed-off-by: Jose Roberto de Souza <[email protected]>
> Signed-off-by: Mika Kahola <[email protected]>
> ---
> drivers/gpu/drm/i915/display/intel_tc.c | 28 +++++++++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_tc.c
> b/drivers/gpu/drm/i915/display/intel_tc.c
> index b192265a3d78..4fca711a58bc 100644
> --- a/drivers/gpu/drm/i915/display/intel_tc.c
> +++ b/drivers/gpu/drm/i915/display/intel_tc.c
> @@ -16,6 +16,10 @@
> #include "intel_mg_phy_regs.h"
> #include "intel_tc.h"
>
> +#define DP_PIN_ASSIGNMENT_C 0x3
> +#define DP_PIN_ASSIGNMENT_D 0x4
> +#define DP_PIN_ASSIGNMENT_E 0x5
> +
> enum tc_port_mode {
> TC_PORT_DISCONNECTED,
> TC_PORT_TBT_ALT,
> @@ -281,6 +285,27 @@ u32 intel_tc_port_get_pin_assignment_mask(struct
> intel_digital_port *dig_port)
> DP_PIN_ASSIGNMENT_SHIFT(tc->phy_fia_idx);
> }
>
> +static int mtl_tc_port_get_pin_assignment_mask(struct intel_digital_port
> *dig_port)
> +{
> + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> + intel_wakeref_t wakeref;
> + u32 pin_mask;
> +
> + with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref)
> + pin_mask = intel_tc_port_get_pin_assignment_mask(dig_port);
> +
> + switch (pin_mask) {
> + default:
> + MISSING_CASE(pin_mask);
> + fallthrough;
> + case DP_PIN_ASSIGNMENT_D:
> + return 2;
> + case DP_PIN_ASSIGNMENT_C:
> + case DP_PIN_ASSIGNMENT_E:
> + return 4;
> + }
> +}
> +
> int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)
> {
> struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev);
> @@ -294,6 +319,9 @@ int intel_tc_port_fia_max_lane_count(struct
> intel_digital_port *dig_port)
>
> assert_tc_cold_blocked(tc);
>
> + if (DISPLAY_VER(i915) >= 14)
> + return mtl_tc_port_get_pin_assignment_mask(dig_port);
> +
> lane_mask = 0;
> with_intel_display_power(i915, POWER_DOMAIN_DISPLAY_CORE, wakeref)
> lane_mask = intel_tc_port_get_lane_mask(dig_port);
> --
> 2.34.1
>
