> -----Original Message-----
> From: Intel-gfx <intel-gfx-boun...@lists.freedesktop.org> On Behalf Of Imre
> Deak
> Sent: Thursday, March 23, 2023 4:20 PM
> To: intel-gfx@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH 16/29] drm/i915/tc: Block/unblock TC-cold in the
> PHY connect/disconnect hooks
>
> Move blocking/unblocking the TC-cold power state to the platform specific PHY
> connect / disconnect hooks. This allows for adjusting the connect/disconnect
> sequence as required for each platform.
>
Reviewed-by: Mika Kahola <mika.kah...@intel.com>
> Signed-off-by: Imre Deak <imre.d...@intel.com>
> ---
> drivers/gpu/drm/i915/display/intel_tc.c | 43 ++++++++-----------------
> 1 file changed, 13 insertions(+), 30 deletions(-)
>
> diff --git a/drivers/gpu/drm/i915/display/intel_tc.c
> b/drivers/gpu/drm/i915/display/intel_tc.c
> index e8bd54d1582bc..253ab30c34f7a 100644
> --- a/drivers/gpu/drm/i915/display/intel_tc.c
> +++ b/drivers/gpu/drm/i915/display/intel_tc.c
> @@ -482,6 +482,8 @@ static bool icl_tc_phy_connect(struct intel_tc_port *tc,
> {
> struct drm_i915_private *i915 = tc_to_i915(tc);
>
> + tc->lock_wakeref = tc_cold_block(tc, &tc->lock_power_domain);
> +
> if (tc->mode == TC_PORT_TBT_ALT)
> return true;
>
> @@ -491,7 +493,7 @@ static bool icl_tc_phy_connect(struct intel_tc_port *tc,
> drm_dbg_kms(&i915->drm, "Port %s: can't take PHY ownership
> (ready %s)\n",
> tc->port_name,
> str_yes_no(tc_phy_is_ready(tc)));
> - return false;
> + goto out_unblock_tc_cold;
> }
>
>
> @@ -502,6 +504,10 @@ static bool icl_tc_phy_connect(struct intel_tc_port *tc,
>
> out_release_phy:
> tc_phy_take_ownership(tc, false);
> +out_unblock_tc_cold:
> + tc_cold_unblock(tc,
> + tc->lock_power_domain,
> + fetch_and_zero(&tc->lock_wakeref));
>
> return false;
> }
> @@ -518,6 +524,9 @@ static void icl_tc_phy_disconnect(struct intel_tc_port
> *tc)
> tc_phy_take_ownership(tc, false);
> fallthrough;
> case TC_PORT_TBT_ALT:
> + tc_cold_unblock(tc,
> + tc->lock_power_domain,
> + fetch_and_zero(&tc->lock_wakeref));
> break;
> default:
> MISSING_CASE(tc->mode);
> @@ -888,32 +897,9 @@ static bool intel_tc_port_needs_reset(struct
> intel_tc_port *tc) static void intel_tc_port_update_mode(struct intel_tc_port
> *tc,
> int required_lanes, bool
> force_disconnect) {
> - enum intel_display_power_domain domain;
> - intel_wakeref_t wref;
> - bool needs_reset = force_disconnect;
> -
> - if (!needs_reset) {
> - /* Get power domain required to check the hotplug live status.
> */
> - wref = tc_cold_block(tc, &domain);
> - needs_reset = intel_tc_port_needs_reset(tc);
> - tc_cold_unblock(tc, domain, wref);
> - }
> -
> - if (!needs_reset)
> - return;
> -
> - /* Get power domain required for resetting the mode. */
> - wref = tc_cold_block_in_mode(tc, TC_PORT_DISCONNECTED,
> &domain);
> -
> - intel_tc_port_reset_mode(tc, required_lanes, force_disconnect);
> -
> - /* Get power domain matching the new mode after reset. */
> - tc_cold_unblock(tc, tc->lock_power_domain,
> - fetch_and_zero(&tc->lock_wakeref));
> - if (tc->mode != TC_PORT_DISCONNECTED)
> - tc->lock_wakeref = tc_cold_block(tc, &tc-
> >lock_power_domain);
> -
> - tc_cold_unblock(tc, domain, wref);
> + if (force_disconnect ||
> + intel_tc_port_needs_reset(tc))
> + intel_tc_port_reset_mode(tc, required_lanes,
> force_disconnect);
> }
>
> static void __intel_tc_port_get_link(struct intel_tc_port *tc) @@ -1053,9
> +1039,6 @@ void intel_tc_port_sanitize_mode(struct intel_digital_port
> *dig_port,
> tc_port_mode_name(tc->init_mode));
> tc_phy_disconnect(tc);
> __intel_tc_port_put_link(tc);
> -
> - tc_cold_unblock(tc, tc->lock_power_domain,
> - fetch_and_zero(&tc->lock_wakeref));
> }
>
> drm_dbg_kms(&i915->drm, "Port %s: sanitize mode (%s)\n",
> --
> 2.37.1
