> -----Original Message----- > From: Intel-gfx <[email protected]> On Behalf Of Imre > Deak > Sent: Thursday, March 23, 2023 4:21 PM > To: [email protected] > Subject: [Intel-gfx] [PATCH 25/29] drm/i915/adlp/tc: Align the > connect/disconnect PHY sequence with bspec > > Bspec has updated the TC connect/disconnect sequences, add the required > platform hooks for these. > > The difference wrt. the old sequence is the order of taking the PHY ownership > - > while holding a port power reference this requires - and blocking the TC-cold > power state. > > Bspec: 49294 >
Reviewed-by: Mika Kahola <[email protected]> > Signed-off-by: Imre Deak <[email protected]> > --- > drivers/gpu/drm/i915/display/intel_tc.c | 111 ++++++++++++++++++++---- > 1 file changed, 94 insertions(+), 17 deletions(-) > > diff --git a/drivers/gpu/drm/i915/display/intel_tc.c > b/drivers/gpu/drm/i915/display/intel_tc.c > index f202ba324fd0a..36454ec5e8e09 100644 > --- a/drivers/gpu/drm/i915/display/intel_tc.c > +++ b/drivers/gpu/drm/i915/display/intel_tc.c > @@ -59,7 +59,6 @@ static enum intel_display_power_domain > tc_phy_cold_off_domain(struct intel_tc_port *); static u32 > tc_phy_hpd_live_status(struct intel_tc_port *tc); static bool > tc_phy_is_ready(struct intel_tc_port *tc); -static bool > tc_phy_take_ownership(struct intel_tc_port *tc, bool take); static enum > tc_port_mode tc_phy_get_current_mode(struct intel_tc_port *tc); > > static const char *tc_port_mode_name(enum tc_port_mode mode) @@ -581,7 > +580,7 @@ static bool icl_tc_phy_connect(struct intel_tc_port *tc, > return true; > > if ((!tc_phy_is_ready(tc) || > - !tc_phy_take_ownership(tc, true)) && > + !icl_tc_phy_take_ownership(tc, true)) && > !drm_WARN_ON(&i915->drm, tc->mode == TC_PORT_LEGACY)) { > drm_dbg_kms(&i915->drm, "Port %s: can't take PHY ownership > (ready %s)\n", > tc->port_name, > @@ -596,7 +595,7 @@ static bool icl_tc_phy_connect(struct intel_tc_port *tc, > return true; > > out_release_phy: > - tc_phy_take_ownership(tc, false); > + icl_tc_phy_take_ownership(tc, false); > out_unblock_tc_cold: > tc_cold_unblock(tc, fetch_and_zero(&tc->lock_wakeref)); > > @@ -612,7 +611,7 @@ static void icl_tc_phy_disconnect(struct intel_tc_port > *tc) > switch (tc->mode) { > case TC_PORT_LEGACY: > case TC_PORT_DP_ALT: > - tc_phy_take_ownership(tc, false); > + icl_tc_phy_take_ownership(tc, false); > fallthrough; > case TC_PORT_TBT_ALT: > tc_cold_unblock(tc, fetch_and_zero(&tc->lock_wakeref)); > @@ -769,6 +768,94 @@ static bool adlp_tc_phy_is_owned(struct intel_tc_port > *tc) > return val & DDI_BUF_CTL_TC_PHY_OWNERSHIP; } > > +static void adlp_tc_phy_get_hw_state(struct intel_tc_port *tc) { > + struct drm_i915_private *i915 = tc_to_i915(tc); > + enum intel_display_power_domain port_power_domain = > + tc_port_power_domain(tc); > + intel_wakeref_t port_wakeref; > + > + port_wakeref = intel_display_power_get(i915, port_power_domain); > + > + tc->mode = tc_phy_get_current_mode(tc); > + if (tc->mode != TC_PORT_DISCONNECTED) > + tc->lock_wakeref = tc_cold_block(tc); > + > + intel_display_power_put(i915, port_power_domain, port_wakeref); } > + > +static bool adlp_tc_phy_connect(struct intel_tc_port *tc, int > +required_lanes) { > + struct drm_i915_private *i915 = tc_to_i915(tc); > + enum intel_display_power_domain port_power_domain = > + tc_port_power_domain(tc); > + intel_wakeref_t port_wakeref; > + > + if (tc->mode == TC_PORT_TBT_ALT) { > + tc->lock_wakeref = tc_cold_block(tc); > + return true; > + } > + > + port_wakeref = intel_display_power_get(i915, port_power_domain); > + > + if (!adlp_tc_phy_take_ownership(tc, true) && > + !drm_WARN_ON(&i915->drm, tc->mode == TC_PORT_LEGACY)) { > + drm_dbg_kms(&i915->drm, "Port %s: can't take PHY > ownership\n", > + tc->port_name); > + goto out_put_port_power; > + } > + > + if (!tc_phy_is_ready(tc) && > + !drm_WARN_ON(&i915->drm, tc->mode == TC_PORT_LEGACY)) { > + drm_dbg_kms(&i915->drm, "Port %s: PHY not ready\n", > + tc->port_name); > + goto out_release_phy; > + } > + > + tc->lock_wakeref = tc_cold_block(tc); > + > + if (!tc_phy_verify_legacy_or_dp_alt_mode(tc, required_lanes)) > + goto out_unblock_tc_cold; > + > + intel_display_power_put(i915, port_power_domain, port_wakeref); > + > + return true; > + > +out_unblock_tc_cold: > + tc_cold_unblock(tc, fetch_and_zero(&tc->lock_wakeref)); > +out_release_phy: > + adlp_tc_phy_take_ownership(tc, false); > +out_put_port_power: > + intel_display_power_put(i915, port_power_domain, port_wakeref); > + > + return false; > +} > + > +static void adlp_tc_phy_disconnect(struct intel_tc_port *tc) { > + struct drm_i915_private *i915 = tc_to_i915(tc); > + enum intel_display_power_domain port_power_domain = > + tc_port_power_domain(tc); > + intel_wakeref_t port_wakeref; > + > + port_wakeref = intel_display_power_get(i915, port_power_domain); > + > + tc_cold_unblock(tc, fetch_and_zero(&tc->lock_wakeref)); > + > + switch (tc->mode) { > + case TC_PORT_LEGACY: > + case TC_PORT_DP_ALT: > + adlp_tc_phy_take_ownership(tc, false); > + fallthrough; > + case TC_PORT_TBT_ALT: > + break; > + default: > + MISSING_CASE(tc->mode); > + } > + > + intel_display_power_put(i915, port_power_domain, port_wakeref); } > + > static void adlp_tc_phy_init(struct intel_tc_port *tc) { > tc_phy_load_fia_params(tc, true); > @@ -779,9 +866,9 @@ static const struct intel_tc_phy_ops adlp_tc_phy_ops = { > .hpd_live_status = adlp_tc_phy_hpd_live_status, > .is_ready = adlp_tc_phy_is_ready, > .is_owned = adlp_tc_phy_is_owned, > - .get_hw_state = icl_tc_phy_get_hw_state, > - .connect = icl_tc_phy_connect, > - .disconnect = icl_tc_phy_disconnect, > + .get_hw_state = adlp_tc_phy_get_hw_state, > + .connect = adlp_tc_phy_connect, > + .disconnect = adlp_tc_phy_disconnect, > .init = adlp_tc_phy_init, > }; > > @@ -823,16 +910,6 @@ static void tc_phy_get_hw_state(struct intel_tc_port > *tc) > tc->phy_ops->get_hw_state(tc); > } > > -static bool tc_phy_take_ownership(struct intel_tc_port *tc, bool take) -{ > - struct drm_i915_private *i915 = tc_to_i915(tc); > - > - if (IS_ALDERLAKE_P(i915)) > - return adlp_tc_phy_take_ownership(tc, take); > - > - return icl_tc_phy_take_ownership(tc, take); > -} > - > static bool tc_phy_is_ready_and_owned(struct intel_tc_port *tc, > bool phy_is_ready, bool phy_is_owned) { > -- > 2.37.1
