[SRU][E][PATCH 10/52] drm/i915: Sanitize the terminology used for TypeC port modes

You-Sheng Yang vicamo.yang at canonical.com
Wed Apr 22 14:11:33 UTC 2020


From: Imre Deak <imre.deak at intel.com>

BugLink: https://bugs.launchpad.net/bugs/1868936

The TypeC port mode can switch dynamically, to reflect that better call
the port's mode as 'mode' rather than 'type'.

While at it:
- s/TC_PORT_TBT/TC_PORT_TBT_ALT/ and s/TC_PORT_TYPEC/TC_PORT_DP_ALT/.
  'TYPEC' is ambiguous, TBT_ALT and DP_ALT better match the reality.

- Remove the 'unknown' TypeC port mode. The mode is always known, it's
  the TBT-alt/safe mode after HW reset and after disconnecting the PHY.
  Simplify the tc_port/tc_type checks accordingly.

- Don't WARN if the port mode changes, that can happen normally.

No functional changes.

Cc: Animesh Manna <animesh.manna at intel.com>
Cc: Paulo Zanoni <paulo.r.zanoni at intel.com>
Cc: Anusha Srivatsa <anusha.srivatsa at intel.com>
Cc: José Roberto de Souza <jose.souza at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Signed-off-by: Imre Deak <imre.deak at intel.com>
Reviewed-by: Lucas De Marchi <lucas.demarchi at intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190628143635.22066-5-imre.deak@intel.com
(cherry picked from commit e9b7e1422d409bb7d3423b8d1e59865227083669)
Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c      | 11 ++---
 drivers/gpu/drm/i915/display/intel_display.h  |  7 ++-
 drivers/gpu/drm/i915/display/intel_dp.c       |  2 +-
 drivers/gpu/drm/i915/display/intel_dpll_mgr.c |  2 +-
 drivers/gpu/drm/i915/display/intel_tc.c       | 48 ++++++++-----------
 drivers/gpu/drm/i915/intel_drv.h              |  2 +-
 6 files changed, 31 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 4742a66608a9..64bce771994b 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -2999,14 +2999,14 @@ static void icl_program_mg_dp_mode(struct intel_digital_port *intel_dig_port)
 	enum tc_port tc_port = intel_port_to_tc(dev_priv, port);
 	u32 ln0, ln1, lane_info;
 
-	if (tc_port == PORT_TC_NONE || intel_dig_port->tc_type == TC_PORT_TBT)
+	if (intel_dig_port->tc_mode == TC_PORT_TBT_ALT)
 		return;
 
 	ln0 = I915_READ(MG_DP_MODE(0, port));
 	ln1 = I915_READ(MG_DP_MODE(1, port));
 
-	switch (intel_dig_port->tc_type) {
-	case TC_PORT_TYPEC:
+	switch (intel_dig_port->tc_mode) {
+	case TC_PORT_DP_ALT:
 		ln0 &= ~(MG_DP_MODE_CFG_DP_X1_MODE | MG_DP_MODE_CFG_DP_X2_MODE);
 		ln1 &= ~(MG_DP_MODE_CFG_DP_X1_MODE | MG_DP_MODE_CFG_DP_X2_MODE);
 
@@ -3049,7 +3049,7 @@ static void icl_program_mg_dp_mode(struct intel_digital_port *intel_dig_port)
 		break;
 
 	default:
-		MISSING_CASE(intel_dig_port->tc_type);
+		MISSING_CASE(intel_dig_port->tc_mode);
 		return;
 	}
 
@@ -3643,8 +3643,7 @@ intel_ddi_pre_pll_enable(struct intel_encoder *encoder,
 	 * Program the lane count for static/dynamic connections on Type-C ports.
 	 * Skip this step for TBT.
 	 */
-	if (dig_port->tc_type == TC_PORT_UNKNOWN ||
-	    dig_port->tc_type == TC_PORT_TBT)
+	if (dig_port->tc_mode == TC_PORT_TBT_ALT)
 		return;
 
 	intel_ddi_set_fia_lane_count(encoder, crtc_state, port);
diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h
index 868914c6d9b5..1d6d0f0af948 100644
--- a/drivers/gpu/drm/i915/display/intel_display.h
+++ b/drivers/gpu/drm/i915/display/intel_display.h
@@ -189,10 +189,9 @@ enum tc_port {
 	I915_MAX_TC_PORTS
 };
 
-enum tc_port_type {
-	TC_PORT_UNKNOWN = 0,
-	TC_PORT_TYPEC,
-	TC_PORT_TBT,
+enum tc_port_mode {
+	TC_PORT_TBT_ALT,
+	TC_PORT_DP_ALT,
 	TC_PORT_LEGACY,
 };
 
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 7b8fa4c9115c..a3dfe1ba281c 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1267,7 +1267,7 @@ static u32 skl_get_aux_send_ctl(struct intel_dp *intel_dp,
 	      DP_AUX_CH_CTL_FW_SYNC_PULSE_SKL(32) |
 	      DP_AUX_CH_CTL_SYNC_PULSE_SKL(32);
 
-	if (intel_dig_port->tc_type == TC_PORT_TBT)
+	if (intel_dig_port->tc_mode == TC_PORT_TBT_ALT)
 		ret |= DP_AUX_CH_CTL_TBT_IO;
 
 	return ret;
diff --git a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
index f199a6769962..5ba6a752187b 100644
--- a/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/display/intel_dpll_mgr.c
@@ -2832,7 +2832,7 @@ icl_get_dpll(struct intel_crtc_state *crtc_state,
 			intel_dig_port = enc_to_dig_port(&encoder->base);
 		}
 
-		if (intel_dig_port->tc_type == TC_PORT_TBT) {
+		if (intel_dig_port->tc_mode == TC_PORT_TBT_ALT) {
 			min = DPLL_ID_ICL_TBTPLL;
 			max = min;
 			ret = icl_calc_dpll_state(crtc_state, encoder);
diff --git a/drivers/gpu/drm/i915/display/intel_tc.c b/drivers/gpu/drm/i915/display/intel_tc.c
index 906b6fe515dc..0748a6a12445 100644
--- a/drivers/gpu/drm/i915/display/intel_tc.c
+++ b/drivers/gpu/drm/i915/display/intel_tc.c
@@ -7,19 +7,18 @@
 #include "i915_drv.h"
 #include "intel_tc.h"
 
-static const char *tc_type_name(enum tc_port_type type)
+static const char *tc_port_mode_name(enum tc_port_mode mode)
 {
 	static const char * const names[] = {
-		[TC_PORT_UNKNOWN] = "unknown",
+		[TC_PORT_TBT_ALT] = "tbt-alt",
+		[TC_PORT_DP_ALT] = "dp-alt",
 		[TC_PORT_LEGACY] = "legacy",
-		[TC_PORT_TYPEC] = "typec",
-		[TC_PORT_TBT] = "tbt",
 	};
 
-	if (WARN_ON(type >= ARRAY_SIZE(names)))
-		type = TC_PORT_UNKNOWN;
+	if (WARN_ON(mode >= ARRAY_SIZE(names)))
+		mode = TC_PORT_TBT_ALT;
 
-	return names[type];
+	return names[mode];
 }
 
 int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)
@@ -29,7 +28,7 @@ int intel_tc_port_fia_max_lane_count(struct intel_digital_port *dig_port)
 	intel_wakeref_t wakeref;
 	u32 lane_info;
 
-	if (tc_port == PORT_TC_NONE || dig_port->tc_type != TC_PORT_TYPEC)
+	if (dig_port->tc_mode != TC_PORT_DP_ALT)
 		return 4;
 
 	lane_info = 0;
@@ -82,8 +81,8 @@ static bool icl_tc_phy_connect(struct intel_digital_port *dig_port)
 	enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
 	u32 val;
 
-	if (dig_port->tc_type != TC_PORT_LEGACY &&
-	    dig_port->tc_type != TC_PORT_TYPEC)
+	if (dig_port->tc_mode != TC_PORT_LEGACY &&
+	    dig_port->tc_mode != TC_PORT_DP_ALT)
 		return true;
 
 	val = I915_READ(PORT_TX_DFLEXDPPMS);
@@ -107,7 +106,7 @@ static bool icl_tc_phy_connect(struct intel_digital_port *dig_port)
 	 * Now we have to re-check the live state, in case the port recently
 	 * became disconnected. Not necessary for legacy mode.
 	 */
-	if (dig_port->tc_type == TC_PORT_TYPEC &&
+	if (dig_port->tc_mode == TC_PORT_DP_ALT &&
 	    !(I915_READ(PORT_TX_DFLEXDPSP) & TC_LIVE_STATE_TC(tc_port))) {
 		DRM_DEBUG_KMS("TC PHY %d sudden disconnect.\n", tc_port);
 		icl_tc_phy_disconnect(dig_port);
@@ -126,15 +125,12 @@ void icl_tc_phy_disconnect(struct intel_digital_port *dig_port)
 	struct drm_i915_private *dev_priv = to_i915(dig_port->base.base.dev);
 	enum tc_port tc_port = intel_port_to_tc(dev_priv, dig_port->base.port);
 
-	if (dig_port->tc_type == TC_PORT_UNKNOWN)
-		return;
-
 	/*
 	 * TBT disconnection flow is read the live status, what was done in
 	 * caller.
 	 */
-	if (dig_port->tc_type == TC_PORT_TYPEC ||
-	    dig_port->tc_type == TC_PORT_LEGACY) {
+	if (dig_port->tc_mode == TC_PORT_DP_ALT ||
+	    dig_port->tc_mode == TC_PORT_LEGACY) {
 		u32 val;
 
 		val = I915_READ(PORT_TX_DFLEXDPCSSS);
@@ -144,9 +140,9 @@ void icl_tc_phy_disconnect(struct intel_digital_port *dig_port)
 
 	DRM_DEBUG_KMS("Port %c TC type %s disconnected\n",
 		      port_name(dig_port->base.port),
-		      tc_type_name(dig_port->tc_type));
+		      tc_port_mode_name(dig_port->tc_mode));
 
-	dig_port->tc_type = TC_PORT_UNKNOWN;
+	dig_port->tc_mode = TC_PORT_TBT_ALT;
 }
 
 static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
@@ -154,26 +150,22 @@ static void icl_update_tc_port_type(struct drm_i915_private *dev_priv,
 				    bool is_legacy, bool is_typec, bool is_tbt)
 {
 	enum port port = intel_dig_port->base.port;
-	enum tc_port_type old_type = intel_dig_port->tc_type;
+	enum tc_port_mode old_mode = intel_dig_port->tc_mode;
 
 	WARN_ON(is_legacy + is_typec + is_tbt != 1);
 
 	if (is_legacy)
-		intel_dig_port->tc_type = TC_PORT_LEGACY;
+		intel_dig_port->tc_mode = TC_PORT_LEGACY;
 	else if (is_typec)
-		intel_dig_port->tc_type = TC_PORT_TYPEC;
+		intel_dig_port->tc_mode = TC_PORT_DP_ALT;
 	else if (is_tbt)
-		intel_dig_port->tc_type = TC_PORT_TBT;
+		intel_dig_port->tc_mode = TC_PORT_TBT_ALT;
 	else
 		return;
 
-	/* Types are not supposed to be changed at runtime. */
-	WARN_ON(old_type != TC_PORT_UNKNOWN &&
-		old_type != intel_dig_port->tc_type);
-
-	if (old_type != intel_dig_port->tc_type)
+	if (old_mode != intel_dig_port->tc_mode)
 		DRM_DEBUG_KMS("Port %c has TC type %s\n", port_name(port),
-			      tc_type_name(intel_dig_port->tc_type));
+			      tc_port_mode_name(intel_dig_port->tc_mode));
 }
 
 /*
diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index ebf789b4e6cf..ab1406859f0f 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1232,7 +1232,7 @@ struct intel_digital_port {
 	enum aux_ch aux_ch;
 	enum intel_display_power_domain ddi_io_power_domain;
 	bool tc_legacy_port:1;
-	enum tc_port_type tc_type;
+	enum tc_port_mode tc_mode;
 
 	void (*write_infoframe)(struct intel_encoder *encoder,
 				const struct intel_crtc_state *crtc_state,
-- 
2.25.1




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