diff options
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_tc.c')
| -rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.c | 322 |
1 files changed, 257 insertions, 65 deletions
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c index f45328712bff..bd8c9df5f98f 100644 --- a/drivers/gpu/drm/i915/display/intel_tc.c +++ b/drivers/gpu/drm/i915/display/intel_tc.c @@ -5,6 +5,7 @@ #include "i915_drv.h" #include "i915_reg.h" +#include "intel_ddi.h" #include "intel_de.h" #include "intel_display.h" #include "intel_display_power_map.h" @@ -118,6 +119,24 @@ assert_tc_cold_blocked(struct intel_digital_port *dig_port) drm_WARN_ON(&i915->drm, !enabled); } +static enum intel_display_power_domain +tc_port_power_domain(struct intel_digital_port *dig_port) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + enum tc_port tc_port = intel_port_to_tc(i915, dig_port->base.port); + + return POWER_DOMAIN_PORT_DDI_LANES_TC1 + tc_port - TC_PORT_1; +} + +static void +assert_tc_port_power_enabled(struct intel_digital_port *dig_port) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + + drm_WARN_ON(&i915->drm, + !intel_display_power_is_enabled(i915, tc_port_power_domain(dig_port))); +} + u32 intel_tc_port_get_lane_mask(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); @@ -418,9 +437,9 @@ static bool icl_tc_phy_is_owned(struct intel_digital_port *dig_port) val = intel_de_read(i915, PORT_TX_DFLEXDPCSSS(dig_port->tc_phy_fia)); if (val == 0xffffffff) { drm_dbg_kms(&i915->drm, - "Port %s: PHY in TCCOLD, assume safe mode\n", + "Port %s: PHY in TCCOLD, assume not owned\n", dig_port->tc_port_name); - return true; + return false; } return val & DP_PHY_MODE_STATUS_NOT_SAFE(dig_port->tc_phy_fia_idx); @@ -464,7 +483,8 @@ static void icl_tc_phy_connect(struct intel_digital_port *dig_port, u32 live_status_mask; int max_lanes; - if (!tc_phy_status_complete(dig_port)) { + if (!tc_phy_status_complete(dig_port) && + !drm_WARN_ON(&i915->drm, dig_port->tc_legacy_port)) { drm_dbg_kms(&i915->drm, "Port %s: PHY not ready\n", dig_port->tc_port_name); goto out_set_tbt_alt_mode; @@ -539,62 +559,171 @@ static void icl_tc_phy_disconnect(struct intel_digital_port *dig_port) } } -static bool icl_tc_phy_is_connected(struct intel_digital_port *dig_port) +static bool tc_phy_is_ready_and_owned(struct intel_digital_port *dig_port, + bool phy_is_ready, bool phy_is_owned) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); - if (!tc_phy_status_complete(dig_port)) { - drm_dbg_kms(&i915->drm, "Port %s: PHY status not complete\n", - dig_port->tc_port_name); - return dig_port->tc_mode == TC_PORT_TBT_ALT; - } + drm_WARN_ON(&i915->drm, phy_is_owned && !phy_is_ready); + + return phy_is_ready && phy_is_owned; +} - /* On ADL-P the PHY complete flag is set in TBT mode as well. */ - if (IS_ALDERLAKE_P(i915) && dig_port->tc_mode == TC_PORT_TBT_ALT) - return true; +static bool tc_phy_is_connected(struct intel_digital_port *dig_port, + enum icl_port_dpll_id port_pll_type) +{ + struct intel_encoder *encoder = &dig_port->base; + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + bool phy_is_ready = tc_phy_status_complete(dig_port); + bool phy_is_owned = tc_phy_is_owned(dig_port); + bool is_connected; - if (!tc_phy_is_owned(dig_port)) { - drm_dbg_kms(&i915->drm, "Port %s: PHY not owned\n", - dig_port->tc_port_name); + if (tc_phy_is_ready_and_owned(dig_port, phy_is_ready, phy_is_owned)) + is_connected = port_pll_type == ICL_PORT_DPLL_MG_PHY; + else + is_connected = port_pll_type == ICL_PORT_DPLL_DEFAULT; - return false; + drm_dbg_kms(&i915->drm, + "Port %s: PHY connected: %s (ready: %s, owned: %s, pll_type: %s)\n", + dig_port->tc_port_name, + str_yes_no(is_connected), + str_yes_no(phy_is_ready), + str_yes_no(phy_is_owned), + port_pll_type == ICL_PORT_DPLL_DEFAULT ? "tbt" : "non-tbt"); + + return is_connected; +} + +static void tc_phy_wait_for_ready(struct intel_digital_port *dig_port) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + + if (wait_for(tc_phy_status_complete(dig_port), 100)) + drm_err(&i915->drm, "Port %s: timeout waiting for PHY ready\n", + dig_port->tc_port_name); +} + +static enum tc_port_mode +hpd_mask_to_tc_mode(u32 live_status_mask) +{ + if (live_status_mask) + return fls(live_status_mask) - 1; + + return TC_PORT_DISCONNECTED; +} + +static enum tc_port_mode +tc_phy_hpd_live_mode(struct intel_digital_port *dig_port) +{ + u32 live_status_mask = tc_port_live_status_mask(dig_port); + + return hpd_mask_to_tc_mode(live_status_mask); +} + +static enum tc_port_mode +get_tc_mode_in_phy_owned_state(struct intel_digital_port *dig_port, + enum tc_port_mode live_mode) +{ + switch (live_mode) { + case TC_PORT_LEGACY: + case TC_PORT_DP_ALT: + return live_mode; + default: + MISSING_CASE(live_mode); + fallthrough; + case TC_PORT_TBT_ALT: + case TC_PORT_DISCONNECTED: + if (dig_port->tc_legacy_port) + return TC_PORT_LEGACY; + else + return TC_PORT_DP_ALT; } +} - return dig_port->tc_mode == TC_PORT_DP_ALT || - dig_port->tc_mode == TC_PORT_LEGACY; +static enum tc_port_mode +get_tc_mode_in_phy_not_owned_state(struct intel_digital_port *dig_port, + enum tc_port_mode live_mode) +{ + switch (live_mode) { + case TC_PORT_LEGACY: + return TC_PORT_DISCONNECTED; + case TC_PORT_DP_ALT: + case TC_PORT_TBT_ALT: + return TC_PORT_TBT_ALT; + default: + MISSING_CASE(live_mode); + fallthrough; + case TC_PORT_DISCONNECTED: + if (dig_port->tc_legacy_port) + return TC_PORT_DISCONNECTED; + else + return TC_PORT_TBT_ALT; + } } static enum tc_port_mode intel_tc_port_get_current_mode(struct intel_digital_port *dig_port) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); - u32 live_status_mask = tc_port_live_status_mask(dig_port); + enum tc_port_mode live_mode = tc_phy_hpd_live_mode(dig_port); + bool phy_is_ready; + bool phy_is_owned; enum tc_port_mode mode; - if (!tc_phy_is_owned(dig_port) || - drm_WARN_ON(&i915->drm, !tc_phy_status_complete(dig_port))) - return TC_PORT_TBT_ALT; + /* + * For legacy ports the IOM firmware initializes the PHY during boot-up + * and system resume whether or not a sink is connected. Wait here for + * the initialization to get ready. + */ + if (dig_port->tc_legacy_port) + tc_phy_wait_for_ready(dig_port); - mode = dig_port->tc_legacy_port ? TC_PORT_LEGACY : TC_PORT_DP_ALT; - if (live_status_mask) { - enum tc_port_mode live_mode = fls(live_status_mask) - 1; + phy_is_ready = tc_phy_status_complete(dig_port); + phy_is_owned = tc_phy_is_owned(dig_port); - if (!drm_WARN_ON(&i915->drm, live_mode == TC_PORT_TBT_ALT)) - mode = live_mode; + if (!tc_phy_is_ready_and_owned(dig_port, phy_is_ready, phy_is_owned)) { + mode = get_tc_mode_in_phy_not_owned_state(dig_port, live_mode); + } else { + drm_WARN_ON(&i915->drm, live_mode == TC_PORT_TBT_ALT); + mode = get_tc_mode_in_phy_owned_state(dig_port, live_mode); } + drm_dbg_kms(&i915->drm, + "Port %s: PHY mode: %s (ready: %s, owned: %s, HPD: %s)\n", + dig_port->tc_port_name, + tc_port_mode_name(mode), + str_yes_no(phy_is_ready), + str_yes_no(phy_is_owned), + tc_port_mode_name(live_mode)); + return mode; } +static enum tc_port_mode default_tc_mode(struct intel_digital_port *dig_port) +{ + if (dig_port->tc_legacy_port) + return TC_PORT_LEGACY; + + return TC_PORT_TBT_ALT; +} + +static enum tc_port_mode +hpd_mask_to_target_mode(struct intel_digital_port *dig_port, u32 live_status_mask) +{ + enum tc_port_mode mode = hpd_mask_to_tc_mode(live_status_mask); + + if (mode != TC_PORT_DISCONNECTED) + return mode; + + return default_tc_mode(dig_port); +} + static enum tc_port_mode intel_tc_port_get_target_mode(struct intel_digital_port *dig_port) { u32 live_status_mask = tc_port_live_status_mask(dig_port); - if (live_status_mask) - return fls(live_status_mask) - 1; - - return TC_PORT_TBT_ALT; + return hpd_mask_to_target_mode(dig_port, live_status_mask); } static void intel_tc_port_reset_mode(struct intel_digital_port *dig_port, @@ -660,11 +789,24 @@ static void intel_tc_port_update_mode(struct intel_digital_port *dig_port, tc_cold_unblock(dig_port, domain, wref); } -static void -intel_tc_port_link_init_refcount(struct intel_digital_port *dig_port, - int refcount) +static void __intel_tc_port_get_link(struct intel_digital_port *dig_port) +{ + dig_port->tc_link_refcount++; +} + +static void __intel_tc_port_put_link(struct intel_digital_port *dig_port) +{ + dig_port->tc_link_refcount--; +} + +static bool tc_port_is_enabled(struct intel_digital_port *dig_port) { - dig_port->tc_link_refcount = refcount; + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + + assert_tc_port_power_enabled(dig_port); + + return intel_de_read(i915, DDI_BUF_CTL(dig_port->base.port)) & + DDI_BUF_CTL_ENABLE; } /** @@ -679,6 +821,7 @@ void intel_tc_port_init_mode(struct intel_digital_port *dig_port) struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); intel_wakeref_t tc_cold_wref; enum intel_display_power_domain domain; + bool update_mode = false; mutex_lock(&dig_port->tc_lock); @@ -689,63 +832,105 @@ void intel_tc_port_init_mode(struct intel_digital_port *dig_port) tc_cold_wref = tc_cold_block(dig_port, &domain); dig_port->tc_mode = intel_tc_port_get_current_mode(dig_port); + /* + * Save the initial mode for the state check in + * intel_tc_port_sanitize_mode(). + */ + dig_port->tc_init_mode = dig_port->tc_mode; + if (dig_port->tc_mode != TC_PORT_DISCONNECTED) + dig_port->tc_lock_wakeref = + tc_cold_block(dig_port, &dig_port->tc_lock_power_domain); + + /* + * The PHY needs to be connected for AUX to work during HW readout and + * MST topology resume, but the PHY mode can only be changed if the + * port is disabled. + * + * An exception is the case where BIOS leaves the PHY incorrectly + * disconnected on an enabled legacy port. Work around that by + * connecting the PHY even though the port is enabled. This doesn't + * cause a problem as the PHY ownership state is ignored by the + * IOM/TCSS firmware (only display can own the PHY in that case). + */ + if (!tc_port_is_enabled(dig_port)) { + update_mode = true; + } else if (dig_port->tc_mode == TC_PORT_DISCONNECTED) { + drm_WARN_ON(&i915->drm, !dig_port->tc_legacy_port); + drm_err(&i915->drm, + "Port %s: PHY disconnected on enabled port, connecting it\n", + dig_port->tc_port_name); + update_mode = true; + } + + if (update_mode) + intel_tc_port_update_mode(dig_port, 1, false); + /* Prevent changing dig_port->tc_mode until intel_tc_port_sanitize_mode() is called. */ - intel_tc_port_link_init_refcount(dig_port, 1); - dig_port->tc_lock_wakeref = tc_cold_block(dig_port, &dig_port->tc_lock_power_domain); + __intel_tc_port_get_link(dig_port); tc_cold_unblock(dig_port, domain, tc_cold_wref); - drm_dbg_kms(&i915->drm, "Port %s: init mode (%s)\n", - dig_port->tc_port_name, - tc_port_mode_name(dig_port->tc_mode)); - mutex_unlock(&dig_port->tc_lock); } +static bool tc_port_has_active_links(struct intel_digital_port *dig_port, + const struct intel_crtc_state *crtc_state) +{ + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + enum icl_port_dpll_id pll_type = ICL_PORT_DPLL_DEFAULT; + int active_links = 0; + + if (dig_port->dp.is_mst) { + /* TODO: get the PLL type for MST, once HW readout is done for it. */ + active_links = intel_dp_mst_encoder_active_links(dig_port); + } else if (crtc_state && crtc_state->hw.active) { + pll_type = intel_ddi_port_pll_type(&dig_port->base, crtc_state); + active_links = 1; + } + + if (active_links && !tc_phy_is_connected(dig_port, pll_type)) + drm_err(&i915->drm, + "Port %s: PHY disconnected with %d active link(s)\n", + dig_port->tc_port_name, active_links); + + return active_links; +} + /** * intel_tc_port_sanitize_mode: Sanitize the given port's TypeC mode * @dig_port: digital port + * @crtc_state: atomic state of CRTC connected to @dig_port * * Sanitize @dig_port's TypeC mode wrt. the encoder's state right after driver * loading and system resume: * If the encoder is enabled keep the TypeC mode/PHY connected state locked until * the encoder is disabled. * If the encoder is disabled make sure the PHY is disconnected. + * @crtc_state is valid if @dig_port is enabled, NULL otherwise. */ -void intel_tc_port_sanitize_mode(struct intel_digital_port *dig_port) +void intel_tc_port_sanitize_mode(struct intel_digital_port *dig_port, + const struct intel_crtc_state *crtc_state) { struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); - struct intel_encoder *encoder = &dig_port->base; - int active_links = 0; mutex_lock(&dig_port->tc_lock); - if (dig_port->dp.is_mst) - active_links = intel_dp_mst_encoder_active_links(dig_port); - else if (encoder->base.crtc) - active_links = to_intel_crtc(encoder->base.crtc)->active; - drm_WARN_ON(&i915->drm, dig_port->tc_link_refcount != 1); - intel_tc_port_link_init_refcount(dig_port, active_links); - - if (active_links) { - if (!icl_tc_phy_is_connected(dig_port)) - drm_dbg_kms(&i915->drm, - "Port %s: PHY disconnected with %d active link(s)\n", - dig_port->tc_port_name, active_links); - } else { + if (!tc_port_has_active_links(dig_port, crtc_state)) { /* * TBT-alt is the default mode in any case the PHY ownership is not * held (regardless of the sink's connected live state), so * we'll just switch to disconnected mode from it here without * a note. */ - if (dig_port->tc_mode != TC_PORT_TBT_ALT) + if (dig_port->tc_init_mode != TC_PORT_TBT_ALT && + dig_port->tc_init_mode != TC_PORT_DISCONNECTED) drm_dbg_kms(&i915->drm, "Port %s: PHY left in %s mode on disabled port, disconnecting it\n", dig_port->tc_port_name, - tc_port_mode_name(dig_port->tc_mode)); + tc_port_mode_name(dig_port->tc_init_mode)); icl_tc_phy_disconnect(dig_port); + __intel_tc_port_put_link(dig_port); tc_cold_unblock(dig_port, dig_port->tc_lock_power_domain, fetch_and_zero(&dig_port->tc_lock_wakeref)); @@ -768,16 +953,23 @@ void intel_tc_port_sanitize_mode(struct intel_digital_port *dig_port) * connected ports are usable, and avoids exposing to the users objects they * can't really use. */ +bool intel_tc_port_connected_locked(struct intel_encoder *encoder) +{ + struct intel_digital_port *dig_port = enc_to_dig_port(encoder); + struct drm_i915_private *i915 = to_i915(dig_port->base.base.dev); + + drm_WARN_ON(&i915->drm, !intel_tc_port_ref_held(dig_port)); + + return tc_port_live_status_mask(dig_port) & BIT(dig_port->tc_mode); +} + bool intel_tc_port_connected(struct intel_encoder *encoder) { struct intel_digital_port *dig_port = enc_to_dig_port(encoder); bool is_connected; intel_tc_port_lock(dig_port); - - is_connected = tc_port_live_status_mask(dig_port) & - BIT(dig_port->tc_mode); - + is_connected = intel_tc_port_connected_locked(encoder); intel_tc_port_unlock(dig_port); return is_connected; @@ -857,14 +1049,14 @@ void intel_tc_port_get_link(struct intel_digital_port *dig_port, int required_lanes) { __intel_tc_port_lock(dig_port, required_lanes); - dig_port->tc_link_refcount++; + __intel_tc_port_get_link(dig_port); intel_tc_port_unlock(dig_port); } void intel_tc_port_put_link(struct intel_digital_port *dig_port) { intel_tc_port_lock(dig_port); - --dig_port->tc_link_refcount; + __intel_tc_port_put_link(dig_port); intel_tc_port_unlock(dig_port); /* |