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author | Imre Deak <imre.deak@intel.com> | 2023-03-23 16:20:31 +0200 |
---|---|---|
committer | Imre Deak <imre.deak@intel.com> | 2023-04-03 11:35:31 +0300 |
commit | 9796a5b2725d1b3ddbbe7b1f3dec56af8cc6af22 (patch) | |
tree | c4514c075df64af9240a5bce9c7dca6a8c22dff1 /drivers/gpu/drm/i915 | |
parent | ebcabb8b15708023b71b7044fdf928454613d118 (diff) | |
download | linux-stable-9796a5b2725d1b3ddbbe7b1f3dec56af8cc6af22.tar.gz linux-stable-9796a5b2725d1b3ddbbe7b1f3dec56af8cc6af22.tar.bz2 linux-stable-9796a5b2725d1b3ddbbe7b1f3dec56af8cc6af22.zip |
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 <mika.kahola@intel.com>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230323142035.1432621-26-imre.deak@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915')
-rw-r--r-- | drivers/gpu/drm/i915/display/intel_tc.c | 111 |
1 files 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 40bd34a633c4..0f147f94341d 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) { |